斜盘式轴向柱塞泵壳体动态特性分析

Dynamic characteristic analysis of housing for a swash-plate axial piston pump

基于斜盘式轴向柱塞泵的几何参数、运动学参数和液压参数建立泵转子的动态平衡方程。求解动态平衡方程,并从泵转子和壳体之间的三大载荷传递路径入手,逐一确定滑靴、轴承和配流盘等运动部件对壳体的动态载荷。用运动部件对壳体的动态载荷等效它们之间的相互作用,从而实现壳体结构与运动部件的单向解耦。建立柱塞泵壳体有限元模型,采用试验模态分析验证模型的正确性。在壳体结构上施加不同工况下的动态载荷,计算壳体结构的动态响应,并用试验数据验证,进一步地,基于振动烈度评估壳体结构的振动大小。斜盘式轴向柱塞泵壳体动态特性分析为面向减振降噪的壳体结构优化设计奠定基础。

A dynamic equilibrium equation of the swash-plate axial piston pump was established based on its geometric,kinematic,and hydraulic parameters.The dynamic equilibrium equation was solved,and from the three load transmission paths between the pump rotor and the housing,the dynamic loads of the slippers,bearings,valve-plate and other moving parts on the housing were determined one by one.The dynamic load of the moving parts on the housing was used to replace the interaction between them,so as to realize the unidirectional decoupling of the housing structure and moving parts.A finite element model of the piston pump housing was established,and the model was verified by experimental modal analysis.The dynamic loads were applied to the housing structure under different working conditions,then the dynamic response of the housing structure was calculated,and verified by measured data.Then the vibration magnitude of the housing structure was evaluated based on vibration intensity.Dynamic characteristic analysis of housing for the swash-plate axial piston pump laid a foundation for its housing structural optimization design for vibration and noise reduction.