关键词: 斜盘式轴向柱塞泵, 机液耦合, 仿真, 试验

Abstract:

In order to solve the problem of digital design of swashplate axial piston pump in the condition of mechanical and hydraulic coupling, this paper used the co-simulation method to bulid the model and analyse the coupling of the piston pump. A power bond graph theory was used to establish hydraulic model of the piston pump, the piston chamber pressure was defined as the coupling variables. The Lagrange method was used to establish dynamics model of the piston pump, coupling variables in hydraulic model were defined as input variables of mechanics model, and the actual speed measured on mechanic model was defined as the input variable of hydraulic model.The decoupling analysis was finished by the complete mechanical and hydraulic coupling model. Finally, an experimental platform was built to verify the correctness and feasibility of the simulation method, the flow rate and pressure between experiment and simulation were compared, and the foundation for the integrated design of piston pump will be built.

Key words: swashplate axial piston pump, mechanical-hydraulic coupling, simulation;experiment