Study On The Influence That The Bottom Structure Of Slipper On The Performance Of Slipper Pair In The Axial Piston Pump

Swash plate type axial piston pump is one of the most widely used power component in modern hydraulic transmission, which has obvious advantages, such as large driving power, high efficiency, excellent dynamic performance, easily stepless speed changing, so it is used in kinds of hydraulic fields. Slipper Pair is a major friction interface of axial piston pump, which ha s particularly influence on high pressure and high flow characteristics of axial piston pump. Therefore it’s the key that improve the characteristics of Slipper Pair to enhance the function of axial piston pump.In this paper, the oil film characteristics of the slipper pair were analyzed. Based on the matching study of elastic deformation on slipper bottom and oil film deformation, an optimization of slipper bottom structure was put forward. By means of programming and simulation, static pressure and dyna mic pressure characteristics which before and after optimization were analyzed. The correctness of the optimization scheme was verified, so it provided a reliable way to optimize the structure of bottom structure of slipper.Through the study on kinematic and mechanical properties of slipper, slipper pair’s dynamic static model was established and supporting mode of bottom was analyzed. Elastic deformation and oil film thickness deformation of inner supporting ring were solved and then pressure and thickness fields were solved with the finite difference method. The flow field of slipper pair was studied by using Fluent, and the velocity vector diagram of the oil film flow field was obtained, and the leakage characteristics of the flow field were analyzed.With the efficiency contribution and the remaining compaction force as a measure of standard, optimized design on the ring structure was carried out with fgoalattain function of Matlab. The elastic deformation of the inner supporting ring, the oil film deformation, the auxiliary power loss, the efficiency, the residual compression force and the flow field characteristics were investigated. According to the optimization scheme, a platform for the optimum design of the ring structure of slipper with user interface was established by means of GUI.The ADAMS dynamic analysis model of axial piston pump was established. The Matlab program which solved the pressure field and the oil film thickness field was converted to C++ program, then it was packaged as a subroutine call ADAMS software solutions. Finally the supporting force of the slipper, the oil film thickness of the bottom surface, and the change of the leakage and friction torque of a single slipper were obtained. Dynamic pressure characteristics of the optimi zed Slipper pair were analyzed and the change of dynamic pressure of the slipper before and after the ring structure size optimization was obtained and the optimization scheme was verified.