基于刚柔耦合的变排量齿轮式机油泵振动特性分析
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摘要
变排量齿轮式机油泵的齿轮振动特性对其正常运行起着至关重要的作用。基于该机油泵的工作原理与多刚体动力学模型,建立虚拟样机的刚柔耦合动力学模型。通过该机油泵综合性能台架试验结果及稳态工况下的仿真结果验证了该模型的有效性与合理性。在此基础上,确定该机油泵振动激励的大小与方向,建立了振动分析模型,通过系统模态及加速度频率响应曲线进行了振动特性及故障分析。研究结果可为该机油泵的结构优化及振动故障诊断等提供参考。
Gear vibration characteristics play a crucial role in normal operating process of the variable displacement gear type oil pump. The rigid-flexible coupling dynamics model of the virtual prototype was established based on the operating principle and multi-body dynamic model of the oil pump. Meanwhile, the reasonability of this dynamic model was verified successfully via the bench test assessing the comprehensive performance of the oil pump and the simulated analysis under the steady-state condition. Based on this dynamic model, the magnitude and direction of the excitation were conformed, resulting in the establishment of the vibration model. Subsequently, the curves of the system modality and frequency response of acceleration were obtained to analysis the vibration characteristics and fault analysis of the oil pump. The study results provide reference for the structure optimization and fault diagnosis of the oil pump.
Gear vibration characteristics play a crucial role in normal operating process of the variable displacement gear type oil pump. The rigid-flexible coupling dynamics model of the virtual prototype was established based on the operating principle and multi-body dynamic model of the oil pump. Meanwhile, the reasonability of this dynamic model was verified successfully via the bench test assessing the comprehensive performance of the oil pump and the simulated analysis under the steady-state condition. Based on this dynamic model, the magnitude and direction of the excitation were conformed, resulting in the establishment of the vibration model. Subsequently, the curves of the system modality and frequency response of acceleration were obtained to analysis the vibration characteristics and fault analysis of the oil pump. The study results provide reference for the structure optimization and fault diagnosis of the oil pump.
引文
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[2]SHEN W,MAI Y F,SU X Y,et al.A new electric hydraulic actuator adopted the variable displacement pump[J].Asian Journal of Control,2018,18(1):178-191.
[3]HAO C Y,FENG G B,SUN H G,et al.Rigid-flexible coupling dynamics simulation of planetary gear transmission based on MFBD[J].Journal of Vibroengineering,2017,19(8):5668-5678.
[4]李增彬.基于虚拟样机技术的振动筛动力学分析及优化设计[D].太原:太原理工大学,2010:49-65.
[5]邱星慧,杨建伟,陈忠伟.刚柔耦合地铁齿轮传动系统振动响应分析[J].机械传动,2018,42(3):85-89.QIU X H,YANG J W,CHEN Z W.Analysis of vibration response of rigid-flexible coupled subway gear transmission system[J].Journal of Mechanical Transmission,2018,42(3):85-89.
[6]TIAN Q,LOU J,MIKKOLA A.A new elastohydrodynamic lubricated spherical joint model for rigid-flexible multibody dynamic[J].Mechanism and Machine Theory,2017,107:210-228.
[7]郝驰宇,冯广斌,闫鹏程,等.基于刚柔耦合的综合传动汇流行星排断齿故障动态特性仿真研究[J].振动与冲击,2018,37(5):248-256.HAO C Y,FENG G B,YAN P C,et al.Effects of broken tooth fault on dynamic characteristics of conflux planetary gear in power shift steering transmission based on rigid-flexible coupled method[J].Journal of Vibration and Shock,2018,37(5):248-256.
[8]刘许兵,王孝兰,刘新田,等.变排量齿轮式机油泵齿轮可靠性研究[J].机械传动,2015,39(11):38-41.LIU X B,WANG X L,LIU X T,et al.Reliability research of the gear of variable displacement gear type oil pump[J].Journal of Mechanical Transmission,2015,39(11):38-41.
[9]ZEHNER B,B?RNER J H,G?RZ I,et al.Workflows for generating tetrahedral meshes for finite element simulations on complex geological structures[J].Computers & Geosciences,2015,79:105-117.