基于Modelica的斜盘式轴向柱塞泵建模仿真研究

Modeling and Simulation of Swash Plate Axial Piston Pump Based on Modelica

斜盘式轴向柱塞泵是典型机电液混合的复杂系统,故障隐蔽性强,缺乏基于实际机械结构的多领域仿真建模。本文开展了基于Modelica的斜盘式柱塞泵建模仿真研究。首先研究了实际某型柱塞泵机械结构参数,进行部件划分和组装建模,搭建了以斜盘式柱塞泵为核心的局部液压系统。然后针对柱塞泵常见的泄漏、压损、堵塞和气穴等故障模式,分别基于模型进行故障注入和定量仿真分析。明确了不同故障发生对液压系统造成的影响,充分验证了该模型对于柱塞泵常见故障问题仿真分析的可用性。该模型提高了斜盘式轴向柱塞泵多领域统一建模的精确性,为故障诊断和健康监测提供了参考。

The swash plate axial piston pump is a typical complex system of electro-hydraulic mixing.Its faults are hardly identified,and a multi-domain simulation modeling method based on actual mechanical structure is on the demand.In this regard,a Modelica-based modeling and simulation approach for the swash plate piston pump is carried out.First,based on the actual mechanical structure parameters of a certain type of piston pumps,component division and assembly modeling are carried out,and a local hydraulic system for the swash plate piston pump is built.Second,common failures of the piston pumps,including leakage,pressure loss,blockage and cavitation,are simulated by the model,and quantitative simulation analysis is carried out.The impact of different faults on the hydraulic system is identified.This demonstrates that the proposed model can work well for the analysis on common faults of piston pumps.This model improves the accuracy of multi-domain unified modeling of swash plate axial piston pumps and provides reference for fault diagnosis and health monitoring.