JBP-40 Radial Piston High-pressure Research Moving Parts And Slipper

Radial piston pumps are widely used in various kinds of equipmentfor its high working pressure, simple structure, high volume efficiency,low noise, impact resistance, long serving life and some other advantages.With the continuous advancement and the requirement of industrialmodernization in China, making higher rated pressure rank of hydraulicpumps has become the development trend in piston pumps.A new type of electro-hydraulic proportion load-sensibility variabledisplacement radial piston pumps have been developed by thecooperation between the scientific research team in our university leadedby Professor Mingzhi Wang and Shanxi Pingyang Machinery Factory,which won the first prize of progress of science and technology in ShanxiProvince. But the rated pressure of this series of radial piston pumps is28MPa, which is still lower than the rated pressure of31.5MPa of domesticCY series axial piston pumps. So the market share of this series of radialpiston pumps is greatly impacted. Therefore, based on the originalproduct, it is urgent for the rated pressure of this series of radial pistonpumps being increased by enterprises and researchers to the internationalstandard35MPa, and the study about the feasibility and the high pressurerealization of this series of radial piston pumps should not be delayed.The JBP-40radial piston pumps were taken as the study object inthis paper, then the pressurization of radial piston pumps moving partsand slipper flow field were analyzed, the details are shown below:1)The rated pressure of radial piston pumps was increased from theoriginal28MPa to35MPa, and then finite element analysis was taken onmain moving parts under the highest experiment pressure.3D entitymodel were constructed on the connecting rod, shaft and rotor by3Dsolid modeling software (Pro/E), finite element analysis was then carriedout by ANSYS, so that the stress and deformation states were concluded, and the strength and stiffness were verified.2)The basic knowledge of fluid mechanics was applied in studyingthe structure of radial piston pump slipper and hydrostatic bearing theory,the mathematic model and geometric flow field model of the slipper flowfield were then constructed. After that, the geometric flow field model ofthe slipper flow field was imported into Gambit, which is the formerprocessing software about Fluent. Next, the model was meshed, andboundary conditions according to the real flowing condition of thehydraulic oil in the slipper flow field were set.3)The right simulation model was chosen and correspondingiterative parameters were set. The slipper flow field with different inletpressure boundary conditions at28MPa and35MPa were numericallysimulated respectively, and the pressure contours and the leakage of theslipper flow field can be got. The structure of slipper flow field forserious leakage of slipper under high pressure was also optimized andimproved, and numerical simulation analysis of the improved slipper flowfield model was conducted.The research of this paper can be extended to high pressure study ofJBP series of radial piston pumps, and theoretical basis for thedevelopment of domestic high pressure radial piston pumps is provided insome extent.