振动影响齿轮泵困油压力的仿真与理论分析

Simulation and theoretical analysis on trapped oil pressure in external gear pump influenced by vibration

为探讨外啮合齿轮泵的齿轮副振动对两困油区内困油压力仿真结果的影响,由困油的体积弹性模量定义建立出有关困油压力的仿真模型,并就有、无振动的两种情况,通过两困油区内来自困油的各种泄漏量的量值比较,分别对2个困油区内困油压力值的大小进行了理论分析,且佐以仿真运算和试验验证。结果表明,第2困油区内的压力峰值大于第1困油区内的压力峰值,振动下的峰值差距较无振动时为小;出口压力越高,峰值差距越大;振动下的仿真结果较无振动时精度更高,例第6组的仿真误差由16.7%改善到7.8%;在困油压力的仿真中,有必要考虑齿轮副的振动因素等,动态困油模型可为泵后续的进一步设计提供理论支持。

For analyzing the influence of gear pair vibration on simulation results of trapped oil pressure stored in the two trapped oil zones of external gear pump,the related pressure simulation model was derived,based on vibration and vibrationless of gear pair,the various leakages from the two trapped oil zones were compared with each other,then the size of two trapped oil pressure value was theoretically analyzed,and the analyzed conclusions were supported by simulation results and experimental verification.All results showed that the pressure peak in the first trapped oil zone was greater than in the second trapped oil zone;the peak difference of two trapped oil pressures in the case of vibration was smaller than in the case of vibrationless;the higher output pressure of pump was,the greater peak difference was;and the simulation results in vibration was more accurate than in vibrationless,for example,the simulation error of the sixth group was reduced from 16.7% to 7.8%,thus in the simulation of trapped oil pressure,the vibration factor was necessary to be involved,et al.The dynamic trapped oil model can provide a theory and for next pump design