Log in

Relevant bibliographies by topics / Digital Radial Piston Pump / Journal articles

Journal articles on the topic 'Digital Radial Piston Pump'

To see the other types of publications on this topic, follow the link: Digital Radial Piston Pump.

Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Digital Radial Piston Pump.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Tao, Jing, Huaiyu Wang, Haohan Liao, and Suiran Yu. "Mechanical design and numerical simulation of digital-displacement radial piston pump for multi-megawatt wind turbine drivetrain." Renewable Energy 143 (December 2019): 995–1009. http://dx.doi.org/10.1016/j.renene.2019.04.159.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Nordås, Sondre, Michael M. Beck, Morten K. Ebbesen, and Torben O. Andersen. "Dynamic Response of a Digital Displacement Motor Operating with Various Displacement Strategies." Energies 12, no. 9 (May 8, 2019): 1737. http://dx.doi.org/10.3390/en12091737.

Full text

Abstract:

Digital displacement technology has the potential of revolutionizing the performance of hydraulic piston pumps and motors. Instead of connecting each cylinder chamber to high and low pressure in conjunction with the shaft position, two electrically-controlled on/off valves are connected to each chamber. This allows for individual cylinder chamber control. Variable displacement can be achieved by using different displacement strategies, like for example the full stroke, partial stroke, or sequential partial stroke displacement strategy. Each displacement strategy has its transient and steady-state characteristics. This paper provides a detailed simulation analysis of the transient and steady-state response of a digital displacement motor running with various displacement strategies. The non-linear digital displacement motor model is verified by experimental work on a radial piston motor.

APA, Harvard, Vancouver, ISO, and other styles

3

Jasiński, Ryszard. "Research of Hydrotronic Variable-Displacement Radial Piston Pump with Electro-Pneumatic Control." Solid State Phenomena 164 (June 2010): 37–40. http://dx.doi.org/10.4028/www.scientific.net/ssp.164.37.

Full text

Abstract:

The paper presents the developed new electro-pneumatic control (pneumotronic) system for hydraulic fixed-displacement radial piston pump. Hydraulic fixed-displacement radial piston pump equipped with the proposed control system changes into hydrotronic variable-displacement radial piston pump. Pump flow rate control is realized by means of programmable logic controller, electro-pneumatic valves, pneumatic cylinders and a sensor.

APA, Harvard, Vancouver, ISO, and other styles

4

Guo, Tong, Shengdun Zhao, and Chen Liu. "Study on flow characteristics and flow ripple reduction schemes of spool valves distributed radial piston pump." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 231, no. 12 (February 6, 2016): 2291–301. http://dx.doi.org/10.1177/0954406216630570.

Full text

Abstract:

This paper studies the flow characteristics and flow ripple reduction techniques of a spool valves distributed radial piston pump. The mathematical models of the pump are established, and simulations based on the mathematics are performed in AMESim environment. The results indicate that the spool valves distributed radial piston pump has fewer flow fluctuations than the pump distributed by check valves, due to the rigid motion of its distribution component—the spool valves. Then, in order to reduce the flow ripple of the spool valves distributed radial piston pump, three techniques, namely, time delay, relief chamfer and transition compression filter volume, are proposed and their working principles are illustrated. Particularly, the design method of time delay is elaborated and its effectiveness is evaluated. The simulation results suggest that with the usage of the time delay method, the fluctuation range of the spool valves distributed radial piston pump is expected to be reduced by 21.7%.

APA, Harvard, Vancouver, ISO, and other styles

5

Dong, Peng, Shengdun Zhao, Shuqin Fan, Muzhi Zhu, and Peng Zhang. "Double-rotator and valve plate distribution radial piston pump." Assembly Automation 40, no. 2 (November 3, 2019): 265–71. http://dx.doi.org/10.1108/aa-12-2018-0270.

Full text

Abstract:

Purpose The drive shaft and the distribution shaft of a traditional radial piston pump are in a cantilever state. To solve this problem, this paper aims to present a radial piston pump with through shaft driving and valve plate distribution. Design/methodology/approach The working principle of the pump is discussed in detail. In this radial piston pump, valve plate distribution parts are designed to distribute oil to the piston chambers, and the distribution shaft is replaced. A bearing is installed between the stator and rotator to reduce the friction. The transmission shaft is supported by two bearings to ensure smooth operation. The support force of the transmission shaft is optimized. In addition, the flow pulsation principle is presented. To accomplish the change, the displacement of the radial piston pump, the proportional control system is designed. Findings After completing the machining and assembly of the pump, an experimental study was carried out. The results show that the output flow of the pump is basically the same as the theoretical flow. Originality/value The friction between the slipping shoes and the stator is greatly reduced due to the function of rolling bearings. The higher stability of the driveshaft is obtained for the reason of double-sided support. The radial piston pump has a novel structural design in reducing the friction between the shoes and the stator and improving the stability of the transmission shaft.

APA, Harvard, Vancouver, ISO, and other styles

6

Cai, Han Ming, and Ming Jie Tian. "Design of a Shaft Assignment Radial Piston Pump." Advanced Materials Research 510 (April 2012): 9–12. http://dx.doi.org/10.4028/www.scientific.net/amr.510.9.

Full text

Abstract:

This paper introduces a kind of shaft structure improvement after assignment radial piston pump, its structure and working principle to improve the axial flow past with radial piston pump shaft with flow the stress of the situation, and improve the hydraulic pump pressure of work and service life.

APA, Harvard, Vancouver, ISO, and other styles

7

MUKAI, Hiroshi. "Basic study on Variable Displacement Radial Piston Pump." Proceedings of Mechanical Engineering Congress, Japan 2016 (2016): S1120203. http://dx.doi.org/10.1299/jsmemecj.2016.s1120203.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Nizhegorodov, A. I., A. N. Gavrilin, B. B. Moyzes, A. I. Cherkasov, O. M. Zharkevich, G. S. Zhetessova, and N. A. Savelyeva. "Radial-piston pump for drive of test machines." IOP Conference Series: Materials Science and Engineering 289 (January 2018): 012014. http://dx.doi.org/10.1088/1757-899x/289/1/012014.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Zhou, Tian Yue. "Research on Velocity Vibration Characteristics of Stator of Radial Piston Pump in Time Domain." Advanced Materials Research 681 (April 2013): 229–33. http://dx.doi.org/10.4028/www.scientific.net/amr.681.229.

Full text

Abstract:

The working mode of constant-pressure radial piston pump includes the mode of constant flow and constant pressure. The dynamic model of stator vibration was established and the analysis was made on the stator vibrating velocity in time domain to the two modes. Measurement mechanism was designed to test the vibration of stator of JB32H-type radial piston pump. It is concluded from the analysis and test results that the velocity of stator vibrates periodically on the two modes. The maximum amplitude on the mode of constant pressure is smaller than the one on the mode of constant flow. The conclusions are helpful to the noise control of piston pump.

APA, Harvard, Vancouver, ISO, and other styles

10

Jiang, Wei, X. G. Qiu, Guo Zhong Chai, and Jian Xing Zhou. "Research of the Pressure Pulsation within Piston Chamber in Radial Piston Pump." Advanced Materials Research 69-70 (May 2009): 626–30. http://dx.doi.org/10.4028/www.scientific.net/amr.69-70.626.

Full text

Abstract:

Noise reduction in piston pumps has been being the focus research. Many methods have been designed to smooth it. Research shows that noise takes place at the time when pistons enter the discharge port or enter the suction port. In fact, noise is induced by imbalance pressure in piston chamber. In this paper, piston initial volume and instantaneous controlled volume are deduced. Equations describing pressure angle-rate-of-change are also deduced. Keep the pressure increment equal when the pump eccentric distance is maximum and minimum, and then find out the optimal structure parameters. The parameters makes the pressure ripple minimize and makes the lowest noise.

APA, Harvard, Vancouver, ISO, and other styles

11

Xu, Bing, Junhui Zhang, Huayong Yang, and Bin Zhang. "Investigation on the radial micro-motion about piston of axial piston pump." Chinese Journal of Mechanical Engineering 26, no. 2 (March 2013): 325–33. http://dx.doi.org/10.3901/cjme.2013.02.325.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Zhou, Tian Yue. "Analysis on Velocity Vibration Characteristics of Stator of Radial Piston Pump." Advanced Materials Research 230-232 (May 2011): 679–84. http://dx.doi.org/10.4028/www.scientific.net/amr.230-232.679.

Full text

Abstract:

The working mode of constant-pressure radial piston pump includes the mode of constant flow and constant pressure. The dynamic model of stator vibration was established and the analysis was made on the stator vibrating velocity in frequency domain to the two modes. Measurement mechanism was designed to test the vibration of stator of JB32H-type radial piston pump. It is concluded from the analysis and test results that the velocity of stator vibrates periodically on the two modes. Stator velocity vibrates in the range of higher frequency on the mode of constant flow than on the mode of constant pressure. The conclusions are helpful to the noise control of piston pump.

APA, Harvard, Vancouver, ISO, and other styles

13

Shen, Hui, Zhuxin Zhou, Dong Guan, Zhongtao Liu, Li Jing, and Chun Zhang. "Dynamic Contact Analysis of the Piston and Slipper Pair in Axial Piston Pump." Coatings 10, no. 12 (December 13, 2020): 1217. http://dx.doi.org/10.3390/coatings10121217.

Full text

Abstract:

The dynamic analysis model of axial piston pump was established; both the kinematics and dynamics simulation analysis were conducted by virtual prototyping approach. The displacement, velocity, acceleration and stress curves of the piston under different working conditions were investigated. In addition, a ball-in-socket contact model was established, and the effects of hydraulic pressure, piston radius and radial clearance on normal displacement, contact radius, maximum contact pressure, normal contact stiffness and tangential contact stiffness were analyzed comprehensively. The results indicate that the normal displacement, maximum contact pressure, contact radius, normal contact stiffness and tangential contact stiffness can be improved by enlarging the piston radius and decreasing the radial clearance.

APA, Harvard, Vancouver, ISO, and other styles

14

Guan, Dong, Li Jing, Harry H. Hilton, and Junjie Gong. "Dynamic lubrication analysis for a spherical pump." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 233, no. 1 (February 28, 2018): 18–29. http://dx.doi.org/10.1177/1350650118762603.

Full text

Abstract:

Dynamic lubrication analyses for a spherical pump, consisting of a piston and cylinder, are presented. Contact forces between piston and cylinder are modeled first using an equivalent ball-on-plane model. Both the effects of external loads and operating conditions are considered in a dynamic elastohydrodynamic lubrication model, which is derived from Reynolds equation. Two assumed time-dependent sine-wave and square-wave loads are applied to the model. Fluid film thicknesses are estimated using the model and assumed loads, effects of different structural, and operational parameters, such as piston diameter, radial clearance, applied load, piston speed, lubricant viscosity, and surface roughness, on fluid film thickness are investigated. Fluid film thickness reactions of more realistic smooth and continuous sine wave loads are compared to discontinuous ones in order to verify whether or not assumed ideal loads are acceptable and reliable. Results indicate that piston diameter, speed, lubricant viscosity have positive relations on the dynamic lubrication performance, and increasing these values can improve the dynamic lubrication regime. While the parameters such as radial clearance, applied load, and surface roughness have the verse effects. Furthermore, the impacts of all the above parameters on fluid film are different either. These obtained results can be used to effectively optimize spherical pump lubrication performance.

APA, Harvard, Vancouver, ISO, and other styles

15

Qiao, Fengli. "PERFORMANCE PREDICTION OF VIRTUAL ELECTROHYDRAULIC CONTROL RADIAL PISTON PUMP." Chinese Journal of Mechanical Engineering 41, no. 10 (2005): 66. http://dx.doi.org/10.3901/jme.2005.10.066.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

SATOH, Yasukazu, and Hirohisa TANAKA. "Pressure pulsation of a small-displacement radial piston pump." Transactions of the Japan Society of Mechanical Engineers Series B 56, no. 526 (1990): 1708–11. http://dx.doi.org/10.1299/kikaib.56.1708.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Zhao, Shengdun, Tong Guo, Yanghuiwen Yu, Peng Dong, Chen Liu, and Wanqiang Chen. "Design and experimental studies of a novel double-row radial piston pump." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 231, no. 10 (December 16, 2015): 1884–96. http://dx.doi.org/10.1177/0954406215623309.

Full text

Abstract:

This paper proposed a novel double-row radial piston pump. In this pump, the transformation from the rotation of the shaft to the reciprocation of the piston is realized by a pentagon mechanism, and the oil is distributed by check valves, which are integrally designed on the pump body. Theoretical calculation demonstrated that this improved design can substantially reduce the force on the main shaft of pump. The formulas of instantaneous flow rate and fluctuation coefficient of the pump are deduced. For studying the working characteristics of the pump further, a prototype was manufactured and tested. Results show that when the rotation speed is over 125 r/min, the performances of pump prototype are qualified, the fluctuation rate is limited to 20% and the volumetric efficiency can reach 90%. Moreover, the pump was disassembled after 100 h of service and the wear condition was checked. Except for the pentagon which has indentation on the surface, the components of the pump are all kept intact.

APA, Harvard, Vancouver, ISO, and other styles

18

Zhao, Kaiping, Tao He, Chuanli Wang, Qiangman Chen, and Zhipeng Li. "Lubrication characteristics analysis of slipper pair of digital valve distribution axial piston pump." Advances in Mechanical Engineering 14, no. 3 (March 2022): 168781322210854. http://dx.doi.org/10.1177/16878132221085442.

Full text

Abstract:

The digital valve distribution axial piston pump is a swashplate rotary piston pump, the force on slippers is different from that of traditional axial piston pump. At the same time, the control strategy of the distribution valve will affect the pressure in the piston cavity, and then affect the oil film lubrication. According to these characteristics, the modeling method of oil film thickness field was proposed, and the force model of slipper pair and the numerical solution model of oil film lubrication of digital valve distribution axial piston pump were further established. The influence of swashplate rotation speed, swashplate inclination angle, and distribution valve control strategy on the characteristics of oil film lubrication were solved. The results show that the established thickness field model of oil film conforms to the stress characteristics of the slipper of the valve distribution pump. Increasing the swashplate rotation speed and the swashplate inclination angle is beneficial to optimize the oil film lubrication performance. The discharge valve should be opened in advance or closed in delay, which is beneficial to prevent eccentric wear and adhesion wear of slippers. The research results can provide theoretical basis for the optimal design of valve distribution axial piston pump.

APA, Harvard, Vancouver, ISO, and other styles

19

Deng, Hong Chuan, Yu Zhang, and Hai Sheng Qian. "Kinematic Analysis of Swash Plate Axial Piston Pump Based on Adams Simulation." Applied Mechanics and Materials 741 (March 2015): 517–20. http://dx.doi.org/10.4028/www.scientific.net/amm.741.517.

Full text

Abstract:

The swash plate axial piston pump is a main part in liquid press system.It is a positive displacement pump which rely on the change of the plunger cavity content to realize oil absorption or discharge of oil by the reciprocating movement of the plunger in the plunger cavity. Plunger, the slippery boots, oil pan, cylinder body are important parts of the swash plate axial piston pump. Sliding boots is one of commonly used by high-pressure plunger pump form, it can meet the needs of the high pressure high speed;the oil distribution plate and cylinder directly affect of the pump efficiency and life span[1]. Because the swash plate axial piston pump has the advantages of compact structure, fewer parts, good manufacture ability, low cost, small volume, light weight, than the radial pump has the advantages of simple structure, easy to realize step less variable and convenient maintenance, it has been widely used in the industrial production.

APA, Harvard, Vancouver, ISO, and other styles

20

Qi, Bo, Yong Zhang, Guoyou Meng, and Yao Ding. "Study on Film Characteristics of Piston-Cylinder Interface of High Pressure Common Rail Radial Piston Pump with Viscosity-Temperature-Pressure Effect." MATEC Web of Conferences 256 (2019): 02007. http://dx.doi.org/10.1051/matecconf/201925602007.

Full text

Abstract:

Aiming at the inaccuracy of equivalent viscosity method in solving the film characteristics of piston-cylinder interface of high-pressure common rail radial piston pump, the film characteristics equation of piston-cylinder interface was established based on the theory of thermo-hydrodynamic lubrication. Through the solution, the thermal properties of the piston-cylinder interface film, which accounted for viscosity-temperature-pressure effect, were studied. The effects of cam speed and film inlet pressure on the characteristics of the piston-cylinder interface film were discussed. The conclusion has certain theoretical and engineering application value for the design and basic research of piston-cylinder interface.

APA, Harvard, Vancouver, ISO, and other styles

21

Kumar, Lokesh, and Nimai Pada Mandal. "Pressure control of variable displacement radial piston pump with PID controller." Materials Today: Proceedings 45 (2021): 5158–65. http://dx.doi.org/10.1016/j.matpr.2021.01.692.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Choi, S. R., J. C. Lim, and I. Y. Lee. "Pressure Pulsation Characteristics of a Multiple-Delivery Radial Piston Hydrulic Pump." Journal of The Korean Society for Fluid Power & Construction Equipments 11, no. 2 (June 1, 2014): 1–8. http://dx.doi.org/10.7839/ksfc.2014.11.2.001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Guan, Dong, Harry H. Hilton, Zhengwei Yang, Li Jing, and Kuan Lu. "Lubrication regime analysis for spherical pump." Industrial Lubrication and Tribology 70, no. 8 (November 12, 2018): 1437–46. http://dx.doi.org/10.1108/ilt-07-2017-0207.

Full text

Abstract:

Purpose This paper aims to investigate the lubrication regime in spherical pump, especially under different structural parameters and operational conditions. Design/methodology/approach A ball-on-plane configuration is adopted to represent the contact model between spherical piston and cylinder cover. The governing equations, which include the Reynolds and elasticity equations, are solved and validated by Jin–Dowson model. Both minimum film thickness and lambda ratio (ratio of minimum fluid film thickness to combined surface roughness of the piston and cylinder cover) of the equivalent model are obtained using an established model. Findings The results indicate that piston diameter and radial clearance are the two main factors affecting the pump lubrication regime. Other related parameters such as rotation speed of the piston, load, viscosity of working medium, material matching and surface roughness of piston and cylinder cover also have different impacts on the lubrication regime of the spherical pump. Originality/value These results emphasize the importance of the design and manufacturing parameters on the tribological performance of spherical pumps and these are also helpful in improving the spherical pump lubrication regime and enlarging its life cycle. This is to certify that to the best of the authors’ knowledge, the content of this manuscript is their own work. This manuscript has only been submitted to this journal and never been published elsewhere. The authors certify that the intellectual content of this manuscript is the product of their own work and that all the assistance received in preparing this manuscript and sources has been acknowledged.

APA, Harvard, Vancouver, ISO, and other styles

24

Qi, Bo, and Zhang Yong. "Tribological study of piston–cylinder interface of radial piston pump in high-pressure common rail system considering surface topography effect." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 234, no. 9 (November 22, 2019): 1381–95. http://dx.doi.org/10.1177/1350650119887820.

Full text

Abstract:

Based on the theory of thermal fluid dynamic lubrication, the Reynolds equation and energy equation of the average flow of a piston–cylinder interface of a radial piston pump in a high-pressure common rail system are established, considering the surface topography effect. The tribological properties of the piston–cylinder interface are calculated by solving the Reynolds equation and energy equation. A surface wear model is established and the wear distribution and trend of the piston–cylinder interface are studied. The wear characteristics of the piston–cylinder interface are verified through experiment, and the wear lubrication of the piston–cylinder interface is discussed. The surface topography effect has a considerable influence on the characteristics of the piston–cylinder interface film. Different surface morphologies change the film characteristics of the piston–cylinder interface, yielding different wear behaviors on the mating surface. The wear of the piston–cylinder interface first decreases along the film outlet to the inlet and then rises. The cylinder surface mainly exhibits abrasive, cavitation, and micro-convex scratch wear, whereas the piston surface mainly shows cavitation wear. The results obtained in this study are of considerable significance as they reveal the tribological properties of the piston–cylinder interface under the surface topography effect.

APA, Harvard, Vancouver, ISO, and other styles

25

Li, Lan, Jiang Ye, and Xue Fei Zheng. "The Electro-Hydraulic Proportional Control and Simulation of the Radial Piston Pump Based on Proportional-Integral-Derivative Neural Network." Advanced Materials Research 139-141 (October 2010): 1749–52. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.1749.

Full text

Abstract:

In this paper a new control method has been studied in which PID control system was integrated into the neural network. It could overcome some disadvantages such as neural network’s slow rate of convergence and PID’s difficulty in application of multivariate nonlinear systems. A controller of the Electro-hydraulic proportional control stroking mechanism for radial piston pump was designed based on the PID neural network control algorithm. The system responses of system variable control signal of system track were achieved by computer simulation. It was found by PIDNN that the control system could reach steady state in a shorter time, compared with PID control system response time by 65% to 80%. The simulation results showed that the controller for the Electro-hydraulic proportional Radial Piston Pump based PID neural network control algorithm would have a good controlling performance.

APA, Harvard, Vancouver, ISO, and other styles

26

Zhang, Xiao Gang, and Long Quan. "The Performance Analysis and Experimental Research of Multiple Oil Ports Axial Piston Pump which Able to Control the Movement of Differential Cylinder Directly in the Closed Circuit." Advanced Materials Research 308-310 (August 2011): 388–400. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.388.

Full text

Abstract:

In order to realize that an asymmetric flow piston pump can control an asymmetric differential cylinder, a proposal about the application of an asymmetric flow-distributing axial piston pump is put forward. The new type of piston pump can output the flows with two different values to control the movement of the differential cylinder directly in the closed circuit and realize much ideal result of the control of the differential cylinder by a single pump. Also a simulation model of the hydraulic pump is established under the circumstance of SimulationX software, considering the characteristics of the movement of an individual piston, the oil compressibility, and the flow distribution area changed with the rotation angle. The key data of the pump is defined by means of digital simulation. In particular, an analysis is made on the dimension of the unloading groove of the port plate and the characteristics of the flow pulse of the pump. Furthermore, an experimental model pump is manufactured, the basic performances of the pump is tested on the experimental platform at various rotatory speeds such as pressure, flow and noise, in the end the accuracy of the principle is verified.

APA, Harvard, Vancouver, ISO, and other styles

27

Kumar, Lokesh, and NimaiPada Mandal. "Reduced Flow Fluctuation of Radial Piston Pump with Silencing Groove Valve Plate." International Journal of Fluid Machinery and Systems 15, no. 1 (March 31, 2022): 38–55. http://dx.doi.org/10.5293/ijfms.2022.15.1.038.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Guo, Tong, Shengdun Zhao, Yanghuiwen Yu, and Peng Shang. "Design and theoretical analysis of a sliding valve distribution radial piston pump." Journal of Mechanical Science and Technology 30, no. 1 (January 2016): 327–35. http://dx.doi.org/10.1007/s12206-015-1236-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Yin, Fanglong, Songlin Nie, Zhenghua Zhang, and Xiaojun Zhang. "Research on the sliding bearing pair of water hydraulic axial piston pump." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, no. 9 (March 21, 2013): 2049–63. http://dx.doi.org/10.1177/0954406212470364.

Full text

Abstract:

Sliding bearing pair is one of the important friction pairs within water hydraulic axial piston pump, which can result in significant influences on the pump’s performance. Generally, owing to the characteristics of low viscosity and poor lubrication of water, the sliding bearing will operate under condition of dry or mixed lubrication, leading to a severe adhesives wear and material softening. In order to investigate the flow field of the sliding bearing in hydrodynamic condition, the effects of the water film pressure distribution, load carrying capacity changing with radial clearance and width–radius ratio of the sliding bearing pair have been simulated through MATLAB. And a suitable material combination of the sliding bearing pair was selected though a custom-manufactured friction and wear test rig. Based on the theoretical and experimental studies, an appropriate structure of the sliding bearing within water hydraulic axial piston pump was designed. The loading experiments for the developed water hydraulic axial piston pump assembled with two different flanges have been conducted at a water hydraulic component test rig. The experimental results revealed that the volumetric efficiency and noise characteristics of the pump are remarkably improved when the sliding bearing work under hydrodynamic lubrication condition in comparison with dry lubrication condition. The research results have laid the foundation for the development and improvement of the water hydraulic axial piston pump.

APA, Harvard, Vancouver, ISO, and other styles

30

Du, Boran, Jihai Jiang, and Geqiang Li. "Investigation of end effect in integrated permanent magnetic damper for cylinder block–valve plate pair in axial piston pump." AIP Advances 12, no. 4 (April 1, 2022): 045004. http://dx.doi.org/10.1063/5.0080222.

Full text

Abstract:

The present work develops an integrated permanent magnetic damper (IPMD) to apply magnetic torque on a cylinder block, which makes it possible to suppress eccentric wear of the cylinder block–valve plate pair in an axial piston pump. Then, the structure and working principle of the IPMD are described. According to the relationship between the axial and the radial magnetic pole gap, the corresponding end flux tube models are established. Based on the principle of micro-displacement, the axial magnetic force and torque output by IPMD are derived. After separating from the relevant structures inside the pump, to ensure the effectiveness of the results, the test method of IPMD independent of the axial piston pump is provided. To make a more comprehensive analysis of the magnetic bearing characteristics, the prototype of IPMD is manufactured and tested. The influence of the end effect of IPMD on the residual hydraulic torque under different discharge pressures is studied. The results verified the correctness of the theoretical analysis, which have important guiding significance to improve the reliability of the cylinder block–valve plate pair in the axial piston pump.

APA, Harvard, Vancouver, ISO, and other styles

31

Wang, Yu Qing, and You Jie Cai. "Design of the Several Pneumatic Tendon Piston." Applied Mechanics and Materials 151 (January 2012): 451–57. http://dx.doi.org/10.4028/www.scientific.net/amm.151.451.

Full text

Abstract:

With the rapid development of hydraulic technology, pressure-driven piston pump, the output pressure, simple structure, in the field of mechanical engineering and field engineering work has been widely used. For existing pneumatic piston existence of a functional insufficiency, poor technical performance, the irrational structure, and high-pressure areas, especially in high pressure areas occupy an irreplaceable position in the axial and radial piston pumps, there are also complex, expensive, traffic pulse rate not ideal and other indicators of disadvantage. In this paper, the normal replacement method for flexible-rigid pneumatic cylinder replacement tendons, structural design, light weight, is able to adapt to harsh environments tendon type pneumatic piston. Practical results shows that the design of the pneumatic piston in the wild-type tendon in applied engineering work obtains good results.

APA, Harvard, Vancouver, ISO, and other styles

32

Pan, Liu Ping, and Zhi Nan Mi. "Variable-Frequency Pump Controlled Piston System for Box Jacking." Applied Mechanics and Materials 365-366 (August 2013): 959–62. http://dx.doi.org/10.4028/www.scientific.net/amm.365-366.959.

Full text

Abstract:

In Shanghai Beihong Vehicular Undercrossing Tunnel project, a new type of hydraulic speed-regulating system, which is variable-frequency pump controlled piston system, was used. It uses variable-frequency technology to adjust rotary speed of driving motor. It can fulfill stepless speed-regulating and has good characteristic of power adaptation and energy-saving. The composition of system and working principle are stated, and mathematical model is derived. Digital simulation results show that the system has good controllability.

APA, Harvard, Vancouver, ISO, and other styles

33

Li, Jingxiang, Xingwang Meng, Peng Dong, and Shengdun Zhao. "Design and analysis of an axial flux permanent magnet motor for the direct drive radial piston pump." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 19-20 (August 25, 2019): 7077–88. http://dx.doi.org/10.1177/0954406219869970.

Full text

Abstract:

Direct drive motor-pumps have attracted a lot of attention from researchers because of high efficiency and compact structure. This paper presents a new type of direct drive motor-pump, which integrates the structure of the radial piston pump and axial-flux permanent-magnet machine. The rotor of the disc motor is fixedly connected to the pump rotor, and the new pump uses a new type of distribution shaft for oil distribution. This structure reduces the intermediate transmission mechanism, and the application of the disc motor further reduces the axial size, the overall volume, and heat dissipation. The efficiency of the entire system has been improved. The three-dimensional finite element method is used to dynamically analyze flow field in the flow channel, which is extracted and simplified. The flow and pressure of the pump meet the design requirements in the simulation. A disc motor was designed for the pump, and the theoretical formula of the disc motor was derived. The initial size of the motor was obtained. The response surface method and three-dimensional finite element are used to optimize the corresponding axial-flux permanent-magnet machine. Loading the torque condition of the pump to the load end of the motor, the response of the motor meets the requirements.

APA, Harvard, Vancouver, ISO, and other styles

34

Kumar, Lokesh, and Nimai Pada Mandal. "Pressure control of fixed displacement variable speed radial piston pump using PID controller." Materials Today: Proceedings 56 (2022): 1840–46. http://dx.doi.org/10.1016/j.matpr.2021.11.034.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Qi, Bo, Yong Zhang, Guoyou Meng, Yao Ding, and Ming Ye. "Study on Film Characteristics of Piston-Cylinder Interface of High-Pressure Common Rail Radial Piston Pump with Micro Motion." IOP Conference Series: Materials Science and Engineering 542 (July 5, 2019): 012018. http://dx.doi.org/10.1088/1757-899x/542/1/012018.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Ułanowicz, Leszek, Grzegorz Jastrzębski, Paweł Szczepaniak, Ryszard Sabak, and Dariusz Rykaczewski. "Malfunctions of Aviation Hydraulic Pumps." Journal of KONBiN 50, no. 3 (October 1, 2020): 257–76. http://dx.doi.org/10.2478/jok-2020-0061.

Full text

Abstract:

AbstractHydraulic pumps are among the most complex and responsible units from the point of view of aircraft flight safety. One of the most important scientific and technical problems in improving the reliability of hydraulic pumps is to understand the physical nature of the cause of damage in them and on this basis to develop measures and recommendations to ensure their reliability. The article discusses the characteristics of hydraulic piston pairs of hydraulic pumps according to the kinematics of their movement and load conditions. Selected actual damages of axial piston pumps are discussed. The paper presents a simplified 3D solid model of the cylinder-piston assembly and the mechanism for adjusting the inclination of the piston cylinder block, the axial hydraulic pump, and the model of breaking loads for selected elements of this pump. The digital solid model and element load analysis were developed in SolidWorks Simulation.

APA, Harvard, Vancouver, ISO, and other styles

37

Muzychuk, Vasyl. "STUDY OF THE DEFORMED STATE CONNECTION OF THE PISTON WITH THE ROD OF THE UNREGULATED PISTON PUMP." Vibrations in engineering and technology, no. 3(98) (October 30, 2020): 95–103. http://dx.doi.org/10.37128/2306-8744-2020-3-10.

Full text

Abstract:

The technological processes of cold rolling of precision workpieces and ring parts, rolling of pipes, rolling of piston-connecting rod axial-rotor piston pump, which are a kind of processing of metals by pressure and contain changes in the shape of workpieces according to performing relative to the axis of the workpiece radial rotational motion. The workpiece can remain stationary or rotate. It is shown that by means of technological process of rolling of pipes, unrolling of preparations various hollow axisymmetric metal products receive, the specified processes are combined by the mechanism of deformation, namely: at them two deformations of compression and one - tension are realized. This mechanical deformation scheme creates favorable conditions for plastic deformation, because intercrystalline displacements are difficult, leading to the violation of mechanical bonds, and plastic deformation occurs mainly due to intracrystalline displacements. It is shown that in the process of connecting the piston-connecting rod in compliance with the process parameters (output supply pressure, feed rate, leaving time) the value of the specified gap either exceeds the maximum value or decreases to the value at which the next operation of the piston-connecting rod spell. The deformed state in the technological operation of rolling the piston-connecting rod pair at different stages of shape change is studied, the process control mechanism is revealed, which prevents the defect in the form of deviation from the regulated gap after rolling between the piston and the connecting rod. The used resource of plasticity at different stages of rolling is calculated, the deformability of the piston workpiece in the rolling process is estimated.

APA, Harvard, Vancouver, ISO, and other styles

38

Yue, Daling, Xiukun Zuo, Zengguang Liu, Yinshui Liu, Liejiang Wei, and Yuyang Zhao. "An Adaptive Control Method for the Distribution Valve of a Digital Pump." Machines 11, no. 2 (January 21, 2023): 148. http://dx.doi.org/10.3390/machines11020148.

Full text

Abstract:

Perfect flow distribution is extremely important and essential for digital pumps. However, the fluctuation of motor speed and the change of valve dynamic characteristics cause the flow distribution flaw, which generates the backflow of the oil in the piston chamber and the decrease in pump volumetric efficiency. Based on the three-dimensional and mathematical modeling of the digital pump, the perfect distribution state of the digital pump is analyzed. Then, the adverse effects of the variations in motor speed and valve dynamic characteristics on the flow distribution of the digital pump were simulated and investigated by the software AMESim. To overcome the aforementioned problems, we proposed an adaptive control method for the flow distribution valve of a digital pump, which was realized by adopting the axis rotation angle and the pressure difference between the inlet and outlet of the flow distribution valve. The results show that the control signal of the flow distribution valve can be regulated automatically along with the motor speed and the valve dynamic characteristics, achieving the ideal flow distribution of the digital pump designed in this paper. The study can be used as a reference for the optimal design and prototype manufacturing of the digital pump.

APA, Harvard, Vancouver, ISO, and other styles

39

Sheng, Xiao Ming. "Digital Control Hydraulic Variable Pump Based on Mechatronic-Hydraulic-Air Integration Driven by Compressed Air." Advanced Materials Research 291-294 (July 2011): 2643–46. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.2643.

Full text

Abstract:

This paper introduces digital control hydraulic variable pump based on mechatronic-hydraulic- air integration driven by compressed air. By inserting the toggle force amplifier in between double-acting rodless air cylinder and variable pump, this pump, driven by compressed air, utilizes small forced air to create big output power. The displacement of air cylinder piston is measured by using digitally linear displacement sensor and it is compared with input signal by computer in order to control pressure and flow rate output by hydraulic cylinder. This pump provides high flexibility and high reliability, simple structure and compact; it is easier to control by artificial intelligence and it will be widely used in the industry.

APA, Harvard, Vancouver, ISO, and other styles

40

Ehsan, Md, W. H. S. Rampen, and S. H. Salter. "Modeling of Digital-Displacement Pump-Motors and Their Application as Hydraulic Drives for Nonuniform Loads." Journal of Dynamic Systems, Measurement, and Control 122, no. 1 (June 26, 1997): 210–15. http://dx.doi.org/10.1115/1.482444.

Full text

Abstract:

The digital-displacement pump-motor is a hybrid device, which combines reciprocating hydraulics with micro-processor control, creating a highly integrated machine capable of producing variable flow and power. It is based on the conventional hydraulic piston pump but with actively controlled poppet valves for each cylinder. This allows enabling or disabling on a stroke-by-stroke basis in any desired sequence. Time-domain modeling of the pump-motor system predicts the performance under variable-demand, variable-speed at different control-modes. The advantages of this approach over conventional techniques lie with both the response speed and the inherent energy efficiency. [S0022-0434(00)00801-7]

APA, Harvard, Vancouver, ISO, and other styles

41

Li, ShaoNian, LieJiang Wei, XiaoPeng Wei, and JunHu Yang. "Change in Oil Pressure in Piston Chamber of a Radial Piston Pump Pre-compression Area When Considering the Compressibility of Oil." International Journal of Fluid Machinery and Systems 13, no. 2 (June 30, 2020): 463–75. http://dx.doi.org/10.5293/ijfms.2020.13.2.463.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Zielinski, Michał, Adam Myszkowski, Marcin Pelic, and Roman Staniek. "Low-speed radial piston pump as an effective alternative power transmission for small hydropower plants." Renewable Energy 182 (January 2022): 1012–27. http://dx.doi.org/10.1016/j.renene.2021.11.014.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Myszkowski, Adam, Roman Staniek, and Michał Zielinski. "Energy analysis of a real suction-pressure unit." Mechanics and Mechanical Engineering 24, no. 1 (September 6, 2020): 26–35. http://dx.doi.org/10.2478/mme-2020-0001.

Full text

Abstract:

AbstractThe article presents an energy analysis of a real suction-pressure unit of a high-efficiency radial piston pump. This pump can be used in small hydropower plants, where, together with a variable displacement hydraulic motor, it would form a hydrostatic transmission. The main advantage of this solution is the possibility of a stepless, automatic change of gear ratio during its operation, which allows an increase of the efficiency of power generation in a hydropower plant. Mathematical models of friction and resistance of flow through self-acting and geometrical deformations of chambers and piston under stress field are presented. In addition, mass, volume, and energy balance calculations were computed for the ideal unit and pressure losses were determined. Derived indicator diagrams for each chamber of the ideal suction-pressure unit served to analyze the technical work of occurring processes. The paper also presents the formulation of total efficiency of the unit. Lastly, the experimental procedure is presented, according to which it is possible to register the most important parameters of the proposed model.

APA, Harvard, Vancouver, ISO, and other styles

44

Saheban Alahadi, Mohammad Javad, Alireza Shirneshan, and Mojtaba Kolahdoozan. "Experimental investigation of the effect of grooves cut over the piston surface on the volumetric efficiency of a radial hydraulic piston pump." International Journal of Fluid Power 18, no. 3 (July 25, 2017): 181–87. http://dx.doi.org/10.1080/14399776.2017.1337440.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Elashmawy, Mohamed. "Experimental Study on Variable Displacement Radial Piston Pump Performance: Injection Application in Round Pipe Cross-Flow." Journal of Hydraulic Engineering 144, no. 3 (March 2018): 06018001. http://dx.doi.org/10.1061/(asce)hy.1943-7900.0001426.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Quan, Jiang, Yang Hongbo, Yu Yong, Cai Liming, and Cheng Xiankai. "Numerical Analysis of the Water Film Characteristics in the Eccentric State of a Radial Piston Pump." IEEE Access 6 (2018): 15274–82. http://dx.doi.org/10.1109/access.2018.2808298.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Tsukiji, Tetsuhiro, Eishin Noguchi, and Futoshi Yoshida. "Development of Oil Hydraulic Components Using a Flow Visualization Technique." International Journal of Automation Technology 6, no. 4 (July 5, 2012): 410–17. http://dx.doi.org/10.20965/ijat.2012.p0410.

Full text

Abstract:

In the present study, we succeed in observing cavitating flow near a notch (V-shaped groove) in a valve plate in an axial piston pump, and we improve an oil hydraulic ball valve, using the visualization technique. Our model of the axial piston pump, is designed to allow the jet flow near the notch and the cavitation cloud to be observed clearly from two directions using a high-speed video camera. Computational Fluid Dynamics (CFD) is employed to estimate the occurrence and the region of the cavitation cloud. It is found that our CFD method is very useful for estimating the region of the cavitation cloud. It is further found that adding notches serves to greatly reduce the cavitation region. Using a commercially available digital video camera, a high-speed video camera, and X-rays source, we also succeed in improving an oil hydraulic ball valve by preventing vibration, cavitation, and the noise.

APA, Harvard, Vancouver, ISO, and other styles

48

Galoppi, Giovanni, Riccardo Secchi, Lorenzo Ferrari, Giovanni Ferrara, Sotirios Karellas, and Daniele Fiaschi. "Radial piston expander as a throttling valve in a heat pump: Focus on the 2-phase expansion." International Journal of Refrigeration 82 (October 2017): 273–82. http://dx.doi.org/10.1016/j.ijrefrig.2017.06.025.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Deng, Haishun, Qingchun Wang, Haifeng Wang, and Chuanli Wang. "Relative motion relation in the external return spherical bearing pair of a balanced double-row axial piston pump." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 11 (October 9, 2018): 3858–72. http://dx.doi.org/10.1177/0954406218805114.

Full text

Abstract:

Based on the external compaction return mechanism of a balanced double-row axial piston pump and the vector coordinate transformation principle, a mathematical model of the relative motion relation within the external return spherical bearing pair was built. The influence of slant inclination of the external swash plate and of pump shaft rotating speed and eccentricity on the relative motion trail, movement speed and acceleration was analysed. The relative motion velocity and acceleration between external retainer plate and external spherical hinge, at top and bottom dead centres, were discussed. By increasing the slant inclination of the external swash plate, the relative motion trail increased correspondingly, leading to a larger size of the pump integral structure. The relative speed and acceleration increased with the pump shaft speed and the slant inclination of the external swash plate, leading to a larger fluctuation of the slipper pair oil film. The increase of eccentricity slightly influenced the relative velocity and acceleration along the x-axis, without significantly increasing the fluctuation of the slipper pair oil film. Increasing the pump shaft speed, the external swash plate slant inclination and the eccentricity all caused fluctuations in the relative velocity and acceleration along the y- and z-axes, deepening the grinding crack on the compaction surface of the external retainer plate. In case of eccentricity and a 0° rotation angle of the principal axis, the related acceleration of the radial friction surface of the retainer plate showed the largest fluctuation amplitude, and a scratch could easily occur.

APA, Harvard, Vancouver, ISO, and other styles

50

Zeng, Qing Liang, Bin Bin Liu, Xin Chao Wang, and Qiang Gu. "Research on Digital Controls of Piston Pumps Based on Compound Control Using Feed-Forward and Feedback Controls." Applied Mechanics and Materials 727-728 (January 2015): 843–46. http://dx.doi.org/10.4028/www.scientific.net/amm.727-728.843.

Full text

Abstract:

Taking the swash plate piston pump as the research plant, the paper introduces the composition of digital control system of variable pump first; Then the mathematical model of variable mechanism is established according to which the closed-loop flow control system and the power control system are worked out. Also, the paper shows the stability margin of the control system and analyzes some response indices to step command under Matlab simulation. Aiming at the shortage of the closed-loop control system, the paper gives an idea of an optimization design of the compound power control system based on both feed-forward and feedback control. Compared with the conventional closed-loop power control method, the compound one gets a 47.2% reduction in the adjusting time and a 38.2% decrease in the overshoot indicating that the adjusting process is obviously shortened and the disturbance effect effectively weakened.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!