泵控马达液压系统压力拍振成因及其动态分析  

Analysis of Pressure Beat Vibration Mechanism and Dynamic Characteristic of Pump-Controlled Motor System

作　　者：杨莎 谷立臣[2] 钱铎宙 YANG Sha;GU Lichen;QIAN Duozhou(School of Railway Equipment Manufacturing,Shaanxi Railway Institute,Weinan Shaanxi 714000,China;School of Mechanical and Electrical,Xi′an University of Architecture and Technology,Xi′an Shaanxi 710055,China;Ningbo Geely Royal Engine Components Co.,Ltd.,Ningbo Zhejiang 315300,China)

机构地区：[1]陕西铁路工程职业技术学院铁道装备制造学院,陕西渭南714000 [2]西安建筑科技大学机电工程学院,陕西西安710055 [3]宁波吉利罗佑发动机零部件有限公司,浙江宁波315300

出　　处：《机床与液压》2024年第17期136-141,共6页Machine Tool & Hydraulics

基　　金：国家自然科学基金面上项目(51675399);陕西铁路工程职业学院2022年校级科研基金项目(KY2022-27)。

摘　　要：针对液压系统中泵和马达的压力脉动频率相近时影响输出稳定性和负载工作可靠性的问题,采用AMESim多学科仿真软件对多能域耦合闭式液压系统进行物理建模,研究不同柱塞副间隙下拍振现象的规律特性。通过计算泵控马达液压系统的阻尼比及分析蓄能器模固有频率,提出利用蓄能器对压力拍振现象进行测试和分析。最后,通过搭建机电液一体化实验平台对仿真分析进行验证。理论分析和实验结果均表明:压力拍振对于压力信号和柱塞磨损等液压系统常见故障的故障特征有明显放大作用,蓄能器对于液压系统压力拍振幅值有明显的缓冲作用。Aiming at the problem that the output stability and load reliability are affected when the pressure pulsation frequencies of the pump and the motor are similar in the hydraulic system,a multidisciplinary simulation software AMESim was used to build a physical model for the multi-energy coupled closed hydraulic system,and the regular characteristics of the beat vibration phenomenon under different plunger pair clearances were studied.Based on the damping ratio of pump-controlled motor system and the natural frequency of accumulator,it was proposed to test and analyze the phenomenon of pressure beat vibration by using accumulator.Finally,the simulation analysis was verified by setting up the mechatronics integrated experimental platform.Both theoretical analysis and experimental results show that the pressure beat vibration has an obvious amplification effect on the fault characteristics of the common hydraulic system faults such as pressure signal and plunger wear,and the accumulator has a significant buffer effect on the pressure beat amplitude of the hydraulic system.

关 键 词：压力拍振 蓄能器 泵控马达 轴向柱塞泵 

分 类 号：TH137.51[机械工程—机械制造及自动化]