Multi-parameter torsional vibration model and dynamic features of an elliptical gear pump with low flow fluctuation

被引：0

作者：

Liu D. ^{[1
,2
]}

Ba Y. ^{[1
]}

机构：

[1] College of Mechanical Engineering, Yanshan University, Qinhuangdao

[2] National Engineering Technology Research Center of Cold Rolling Strip Equipment and Technology, Yanshan University, Qinhuangdao

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2020年 / 39卷 / 03期

关键词：

Gear dynamics; Non-circular gear; Parametric excitation; Torsional vibration;

D O I：

10.13465/j.cnki.jvs.2020.03.012

中图分类号：

学科分类号：

摘要：

New type elliptical gear pump has performance advantages of low flow fluctuation and large output volume, and it is widely used in fluid transportation field. Here, aiming at the pump's two-stage non-circular gear transmission mechanism, the pump's dynamic features were studied under multiple parametric excitations. The flow fluctuation composition of the pump was analyzed, and a method based on non-circular gears' variable-speed drive was proposed to suppress main ripple caused by non-circular rotor. The exciting mechanism of non-circular gear time-varying instantaneous center was discussed, and the dynamic model of the two-stage non-circular gear transmission mechanism was established. Using Runge-Kutta method, the torsional vibration features of the pump's transmission mechanism were quantitatively studied under the compound excitation of instantaneous center and stiffness. The results showed that the elliptical gear pump's transmission mechanism has complicated multi-frequency response; with increase in eccentricity, rotating speed and the pump's outlet pressure, rotor vibrations due to instantaneous center and stiffness have different changes, and finally cause two rotors' vibration to intensify. © 2020, Editorial Office of Journal of Vibration and Shock. All right reserved.

引用

页码：88 / 94and103

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