Numerical Simulation And Research Of Radial Piston Pump Slipper Pair Internal Flow Field

JBP radial piston pump is an independent development volume type hydraulic pump of our country,which has high pressure,large flow,high efficiency.It was widely used in the agricultural machinery,construction machinery,mining machinery,ship construction and so on.Its performance directly influences hydraulic system's performance and operational conditon.Slipper pair is one of the key friction pairs of this series pump,of which performance is playing the very important role to the pump's reliability.Therefore,conducting the further research to its ternal flow field and grasping the slipper pair internal fluid flow field and the temperature field distribution detailedly and accurately,not only has the theoretical signiflcances,but also has very practical values.Firstly,this paper analyzed the working principles and structure of the slipperstator friction pair of JBP32H radial piston pump,used three dimensional software PRO/E to establish the slipper pair's physical model,established the grid model by GAMBIT.Secondly,according to computational fluid dynamics' elementary theory,the paper established mathematical model of the slipper pair field's fluid flow,proposed the governing equations to solving flow field and the temperature fields,as well as the basic assumptions and calculation conditions of solving equation.And in term of the hydraulic oil's actual flow situation in the slipper,the initial conditions and boundary conditions that meet the actual conditions were given out.Thirdly,by selecting the appropriate simulation model and setting the corresponding iteration initial parameters,the model equations are solved by the Finite Volume Method and the segregated solver of FLUENT based on CFD principle and laminar flow model.The numerical simulation curves of the pressure distribution,the velocity distribution as well as the temperature field distribution under the different working conditions were obtained. At last,in view of the existing model's deficiency,this paper proposed an improved slipper structure and the improved model of slipper pair flow field was analyzed.The numerical calculation results indicated that the improved scheme was feasible.This paper applied iterative computation by using FLUENT software of CFD in the research of radial piston pump slipper pair successfully for the first time.The research results could provide evidences for the further researches on the slipper pair and have guiding significances for the radial piston pump slipper pair structure design and the performance optimization.