Development of the Rexroth High-Pressure Piston Pump Test for Hydraulic Fluid Qualification

2002 ◽  
Author(s):  
R. Michael ◽  
H. M. Melief ◽  
C. G. Fey ◽  
G. E. Totten ◽  
R. J. Bishop
Keyword(s):  
High Pressure ◽  
Piston Pump ◽  
Hydraulic Fluid ◽  
Pump Test

scholarly journals Development of a New High-Pressure Piston Pump Test for Hydraulic Fluid Qualification

2002 ◽  
Vol 2002 (5-1) ◽  
pp. 245-250 ◽  
Author(s):  
R. Michael ◽  
H. M. Melief ◽  
C. G. Fey ◽  
G. E. Totten ◽  
R. J. Bishop
Keyword(s):  
High Pressure ◽  
Piston Pump ◽  
Hydraulic Fluid ◽  
Pump Test

scholarly journals Development of a Standard High-Pressure Hydraulic Piston Pump Test: Status of ASTM D.02.N.07 Piston Pump Task Force Activities

2002 ◽  
Vol 2002 (5-1) ◽  
pp. 277-282
Author(s):  
George E. Totten ◽  
Gary H. Kling ◽  
Peter W. Offutt ◽  
Roland J. Bishop ◽  
John V. Sherman
Keyword(s):  
High Pressure ◽  
Task Force ◽  
Piston Pump ◽  
Hydraulic Piston Pump ◽  
Pump Test ◽  
D 02

Development of a High Pressure Vane Type Hydraulic Pump Test

1975 ◽  
Author(s):  
D. A. Chirichella ◽  
R. W. Jack ◽  
E. A. Baniak
Keyword(s):  
High Pressure ◽  
Hydraulic Pump ◽  
Pump Test

Study on the Influence of Deformation of the Slipper of Axial Piston Pump under High Pressure on Oil Film Structure

2014 ◽  
Vol 900 ◽  
pp. 734-737 ◽  
Author(s):  
Huai Chao Wu ◽  
Yun Liu Yu
Keyword(s):  
High Pressure ◽  
Film Structure ◽  
Piston Pump ◽  
Axial Piston Pump ◽  
Working Pressure ◽  
Element Analysis ◽  
Oil Film ◽  
The Finite Element Analysis ◽  
Order Of Magnitude ◽  
Axial Piston

The stress and strain of the slipper of 35 MPa high pressure axial piston pump are analyzed by the finite element analysis method, and the following facts are revealed: in spite of the fact that the slipper can satisfy the use requirement in the aspect of stress, whereas, in the aspect of strain, the deformation of the bottom of the slipper increases with the pressure increase, and the deformation of the slipper has reached the order of magnitude of the oil film thickness under 35 MPa working pressure. Therefore, when the slipper pair of 35 MPa high pressure axial piston pump is designed and its oil film performances are studied, the influence of deformation of the slipper on the oil film structure must be considered comprehensively. The results of this study can provide some guides for developing 35 MPa high pressure axial piston pump.

Tribological study of piston–cylinder interface of radial piston pump in high-pressure common rail system considering surface topography effect

2019 ◽  
Vol 234 (9) ◽  
pp. 1381-1395 ◽  
Author(s):  
Bo Qi ◽  
Zhang Yong
Keyword(s):  
High Pressure ◽  
Surface Topography ◽  
Tribological Properties ◽  
Reynolds Equation ◽  
Energy Equation ◽  
Common Rail ◽  
Piston Pump ◽  
Common Rail System ◽  
Topography Effect ◽  
Piston Cylinder

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.

Calculation Method of Lubricant Film Pressure Distribution of Axial Piston Pump Slippers

2013 ◽  
Vol 328 ◽  
pp. 629-633
Author(s):  
Ya Jun Wang
Keyword(s):  
High Pressure ◽  
Pressure Distribution ◽  
Mass Conservation ◽  
Piston Pump ◽  
Axial Piston Pump ◽  
Shearing Flow ◽  
Pump Speed ◽  
Pressure Area ◽  
The Difference ◽  
Axial Piston

A method is implemented to get the pressure distribution of the axial piston pump slipper. Slipper was seen as translating thrust bearing, taking slipper tilt and spin in account, based on finite volume method, hydrodynamic and hydrostatic pressure has been calculated by using the mass conservation principle. For a representative element volume, the difference flow was averaged by the difference flow between the tilting planes, and the shearing flow by slipper translating was averaged by the shearing flow between the tilting planes. The numerical calculating result based two liquid resistance assume was compared, the results showed that two methods have got the same pressure distribution schematics, and the high pressure area locates at the slipper titling direction, but for the pressure values at high pressure area, the second method is slightly higher than the first method, and that the higher pump speed were, the higher the pressure values, and at the same pump speed, the slipper spin speed affects slightly the pressure, and at the lower pump speed, the lubricant pressure tends to the hydrostatic lubrication.

scholarly journals Study on Film Characteristics of Piston-Cylinder Interface of High Pressure Common Rail Radial Piston Pump with Viscosity-Temperature-Pressure Effect

2019 ◽  
Vol 256 ◽  
pp. 02007
Author(s):  
Bo Qi ◽  
Yong Zhang ◽  
Guoyou Meng ◽  
Yao Ding
Keyword(s):  
High Pressure ◽  
Pressure Effect ◽  
Hydrodynamic Lubrication ◽  
Engineering Application ◽  
Basic Research ◽  
Common Rail ◽  
Piston Pump ◽  
Piston Cylinder ◽  
Film Characteristics ◽  
High Pressure Common Rail

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.

scholarly journals Research on thermal-fluid-structure coupling of valve plate pair in an axial piston pump with high pressure and high speed

2018 ◽  
Vol 70 (6) ◽  
pp. 1137-1144
Author(s):  
Zhanling Ji
Keyword(s):  
High Pressure ◽  
High Speed ◽  
Valve Plate ◽  
Piston Pump ◽  
Axial Piston Pump ◽  
Fluid Structure ◽  
Content Type ◽  
Oil Film ◽  
Field Coupling ◽  
Axial Piston

Purpose High pressure and high speed of the axial piston pump can improve its power density, but they also deteriorate the thermal-fluid-structure coupling effect of the friction pairs. This paper aims to reveal the coupling mechanism of the pump, for example, valve plate pair, by carrying out research on multi-physics field coupling. Design/methodology/approach Considering the influences of temperature on material properties and thermal fluid on structure, the thermal-fluid elastic mechanics model is established. A complete set of fast and effective thermal-fluid-structure coupling method is presented, by which the numerical analysis is conducted for the valve plate pair. Findings According to calculations, it is revealed that the temperature and pressure evolution laws of oil film with time, the pressure distribution law of the fluid, stress and displacement distribution laws of the solid in the valve plate pair. In addition, the forming history of the wedge-shaped oil film and mating clearance change law with rotational speed and outlet pressure in the valve plate pair are presented. Originality/value For an axial piston pump operating under high speed, high pressure and wide temperature range, the multi-physics field coupling analysis is an indispensable means and method. This paper provides theoretical evidence for the development of the pump and lays a solid foundation for the research of the same kind of problem.

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