Research on Dynamic Characteristics of Turbine Pump Ball Bearing Under Different Axial Clearance

Gong Zhicheng; Xu Zili; Wang Jun; Huang Jinping

doi:10.7652/xjtuxb202307009

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Research on Dynamic Characteristics of Turbine Pump Ball Bearing Under Different Axial Clearance

更新时间：2025-07-09

- Research on Dynamic Characteristics of Turbine Pump Ball Bearing Under Different Axial Clearance
- Vol. 57, Issue 7, Pages: 101-110(2023)
- 作者机构：
  
  1. 西安交通大学机械结构强度与振动国家重点实验室,西安,710049
  2. 西安航天动力研究所,西安,710100
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202307009
  CLC： TH133.3
- Online First：10 July 2023，
  
  Published：2023
- 稿件说明：
移动端阅览
Gong Zhicheng, Xu Zili, Wang Jun, et al. Research on Dynamic Characteristics of Turbine Pump Ball Bearing Under Different Axial Clearance[J]. 2023, 57(7): 101-110.
DOI：

Gong Zhicheng, Xu Zili, Wang Jun, et al. Research on Dynamic Characteristics of Turbine Pump Ball Bearing Under Different Axial Clearance[J]. 2023, 57(7): 101-110. DOI： 10.7652/xjtuxb202307009.

摘要

针对不合理的轴向游隙会恶化轴承的工作环境、降低轴承寿命并影响到涡轮泵球轴承-转子系统的稳定运行的问题

根据轴向游隙与接触角间的数学关系

将轴向游隙引入轴承部件的几何分析中

并基于Hertz接触定理和各部件间的相互作用

建立了考虑轴向游隙的涡轮泵球轴承动态特性计算模型。依据部件间变形几何关系进行变量缩减

简化了解析形式刚度矩阵的建立流程

降低了迭代计算的复杂度。以涡轮泵某型号球轴承为例

对不同载荷工况下轴向游隙对接触载荷、刚度和旋滚比的影响进行计算分析。计算结果表明:当轴向游隙增大

滚球与内、外滚道间的接触载荷均会降低

轴向刚度增大

径向刚度减小

所有滚球旋滚比均会升高

各滚球旋滚比之间的差异也会增大; 当轴承所受径向力较大或转速较高时

轴向游隙越大

轴承刚度和旋滚比随外载荷改变而变化的程度越明显。所建立的模型和动力学典型算例的计算结果偏差最大不超过2.02%

整体偏差较低

证明了所建立的模型在轴承动态参数计算上的有效性和稳定性

同时也表明了在数值求解及迭代矩阵建立上采取的简化措施是可行的。

Abstract

In terms of the problem that the unreasonable axial clearance worsens the working environment of the bearing

shortens the bearing life and affects the stable operation of the turbine pump ball bearing-rotor system

the axial clearance is introduced into the geometric analysis of the bearing components according to the mathematical relationship between the axial clearance and the contact angle; based on the Hertz contact theorem and the interaction between the components

the dynamic characteristics calculation model of the turbine pump ball bearing regarding the axial clearance is established. The variable reduction is carried out depending on the deformation geometric relationship between the components

thus simplifying the establishment process of the analytical formal stiffness matrix

and reducing the complexity of iterative calculation. With a certain type of turbine pump ball bearings taken as an example

the effects of axial clearance on contact load

stiffness and spin-roll ratio under different load conditions are calculated and analyzed. The calculation results show that when the axial clearance increases

the contact load between the ball and the inner and outer raceways will decrease

the axial stiffness will increase

the radial stiffness will decrease

the spin-roll ratios of all balls will increase

and the difference between the spin-roll ratios of balls will also increase; the larger the radial force applied on the bearing is or the higher the rotational speed is

and the larger the axial clearance is

the more obviously the bearing stiffness and the spin-roll ratio will change with the change of external load. The maximum deviation of the established model and the typical dynamic examples is less than 2.02%

and the overall deviation is low

which proves the effectiveness and stability of the established model in the calculation of bearing dynamic parameters. It also shows that the simplified measures taken in the numerical solution and the establishment of iterative matrixes are feasible.

关键词

Keywords

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