Dynamic characteristics of misaligned gear coupling⁃bearing⁃rotor system

Guoyuan ZHANG; Maotan LIANG; Jinxing GUO; Xiaozhe NIU

doi:10.13224/j.cnki.jasp.20210017

Chinese

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Dynamic characteristics of misaligned gear coupling⁃bearing⁃rotor system

Structure,Strength and Vibration | 更新时间：2025-04-07

- Dynamic characteristics of misaligned gear coupling⁃bearing⁃rotor system
- Journal of Aerospace Power Vol. 37, Issue 2, Pages: 225-234(2022)
- 作者机构：
  
  1.西安电子科技大学机电工程学院，西安 710071
  2.中国航天科技集团有限公司西安航天动力研究所，西安 710100
- 作者简介：
- 基金信息：
- DOI：10.13224/j.cnki.jasp.20210017
  CLC：
- 稿件说明：
移动端阅览
Guoyuan ZHANG, Maotan LIANG, Jinxing GUO, et al. Dynamic characteristics of misaligned gear coupling⁃bearing⁃rotor system[J]. Journal of Aerospace Power, 2022, 37(2): 225-234.
DOI：

Guoyuan ZHANG, Maotan LIANG, Jinxing GUO, et al. Dynamic characteristics of misaligned gear coupling⁃bearing⁃rotor system[J]. Journal of Aerospace Power, 2022, 37(2): 225-234. DOI： 10.13224/j.cnki.jasp.20210017.

摘要

为适应液体火箭发动机高速涡轮泵模拟运转需求，内啮合齿轮联轴器被设计作为涡轮快速起动过程运动传递的核心零部件；实际中联轴器前后两轴的不对中程度对试验转子动态性能产生了极大影响。构建了此类特定工程应用的内啮合齿轮联轴器刚度阻尼计算模型、多种不对中工况的表征方法及其附加力与力矩的求解模型、考虑不对中因素的联轴器⁃滚动轴承⁃双转子动力学分析模型，耦合上述模型数值求解得到了不对中参数对试验转子动力学性能的影响规律，包括临界转速、振动响应等，与文献对比完成了模型验证。结果表明：构建模型的动态响应误差小于15%；缩短联轴器和提高涡轮和试验转子同轴对中量可较好地降低系统的动力响应值，可有效地降低转子碰磨故障现象的产生，且其对双转子系统临界转速的影响较小，研究将为高速涡轮泵的设计和安全运行提供理论和试验参考。

Abstract

For meeting the requirement of the simulated operation of a high⁃speed turbopump in liquid rocket engine，an internal gear coupling was designed as the key component to transfer the motion during the fast start⁃up stage.The misalignment of the center axis between the turbo rotor and the test rotor had a significant impact on the dynamics performance of the test rotor.The stiffness and damping theoretical model of the internal gear coupling，the model for solving additional forces and moments of the gear coupling under various misalignment conditions，and the dynamic model considering the misalignment factor for double rotor system coupling the gear coupling and the rolling bearing were proposed.The influences of the misalignment parameters on the dynamic performance (critical speed and vibration response) of the test rotor were obtained by numerical solution of the above coupled models，and the model verification was completed by comparing with the literature.The results showed the vibration response error between the proposed model and literature was less than 15%，and shortening the gear coupling length and increasing the center axis alignment can reduce effectively the dynamic response of the rotor system，and had little effect on the critical speed of the double rotor system.The research results provide a theoretical and experimental reference for the design and safe operation of high⁃speed turbopump.

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references

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