Calculation of fatigue life of tunnel boring machine's main bearing considering roller profile modification

ZHANG Siying

doi:10.16578/j.issn.1004.2539.2026.03.022

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Calculation of fatigue life of tunnel boring machine's main bearing considering roller profile modification

Fault Diagnosis and Failure Analysis | 更新时间：2026-05-27

- Calculation of fatigue life of tunnel boring machine's main bearing considering roller profile modification
- Journal of Mechanical Transmission Vol. 50, Issue 3, Pages: 193-199(2026)
- 作者机构：
  
  中国铁建重工集团股份有限公司，长沙 410110
- 作者简介：
- 基金信息：
- DOI：10.16578/j.issn.1004.2539.2026.03.022
  CLC： TH132
- Received：27 September 2024，
  
  Revised：2024-12-23，
  
  Published：15 March 2026
- 稿件说明：
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张思颖. 考虑滚子修形的盾构机主轴承疲劳寿命计算［J］. 机械传动，2026，50（3）：193-199.

ZHANG Siying. Calculation of fatigue life of tunnel boring machine's main bearing considering roller profile modification［J］. Journal of Mechanical Transmission，2026，50（3）：193-199.
张思颖. 考虑滚子修形的盾构机主轴承疲劳寿命计算［J］. 机械传动，2026，50（3）：193-199. DOI： 10.16578/j.issn.1004.2539.2026.03.022.

ZHANG Siying. Calculation of fatigue life of tunnel boring machine's main bearing considering roller profile modification［J］. Journal of Mechanical Transmission，2026，50（3）：193-199. DOI： 10.16578/j.issn.1004.2539.2026.03.022.

摘要

目的

针对盾构机用三排滚子结构主轴承，建立一种考虑滚子修形的疲劳寿命计算方法，为确定滚子修形方式和程度提供指导。

方法

首先，通过几何分析，建立滚子-滚道接触变形与内圈整体轴向、径向位移的数学关系，基于Palmgren经验公式和内圈受力平衡方程，构建主轴承载荷分布模型，求解得到各滚子载荷；其次，对滚子沿素线方向进行等距切片，利用有限长线接触理论建立修形滚子与滚道的弹性接触模型，获取各切片处的接触应力；最后，依据ISO/TS 16281标准，分别计算对应于套圈基本额定动载荷和当量动载荷的滚子切片载荷，进而计算主轴承的疲劳寿命。

结果

结果表明，滚子修形凸度量显著影响主轴承疲劳寿命；随着凸度量的增大，疲劳寿命呈现先增大后减小的趋势，存在一个最优修形凸度量使主轴承疲劳寿命达到最大值。

Abstract

Objective

Aiming at the main bearing with three-row roller structure for shield tunneling machines

a fatigue life calculation method considering roller profile modification was established to provide guidance for determining the modification method and degree.

Methods

Firstly

through geometric analysis

the mathematical relation between roller-raceway contact deformation and the overall axial and radial displacements of the inner ring was established. Based on Palmgren's empirical formula and the force equilibrium equations of the inner ring

a load distribution model was constructed and solved to obtain the load on each roller. Secondly

the rollers were sliced equidistantly along the generatrix direction. An elastic contact model between the modified roller and the raceway was established using finite line contact theory to obtain the contact stress at each slice. Finally

according to ISO/TS 16281 standard

the roller slice loads corresponding to the basic rated dynamic load and the equivalent dynamic load of the ring were calculated respectively to determine the fatigue life of the main bearing.

Results

The results show that the roller modification convexity significantly affects the fatigue life of the main bearing. With the increase of convexity

the fatigue life increases first and then decreases

indicating the existence of an optimal convexity that maximizes the fatigue life.

关键词

Keywords

references

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