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<p>The main bearing is a crucial component of shield machines and its design has attracted great interest. In this paper, both static analysis and dynamic simulation models of the main bearing are developed. A comparative analysis shows that the load distribution obtained from the dynamic simulation model is closer to reality and serves as load input for the roller profiling design. An optimization equation for roller profiling is proposed, which takes into account multiple factors and has continuous ends. Under rated working conditions, using the proposed method, the main thrust roller reduces the maximum contact stress by approximately 11.49 % and 18.20 % compared to the ISO and Lundberg equations, respectively. Furthermore, under dynamic working conditions, the proposed roller profile design reduces the equivalent maximum contact stress by about 11.37 %, 21.68 %, and 9.28 % for the main thrust roller, auxiliary thrust roller, and radial roller, respectively, compared to the ISO profile scheme.</p>

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Research on roller profile design scheme for the main bearing of shield machine based on dynamic working conditions

  • 期刊论文

  • 发表日期：

    2025年12月4日

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  • Zhihong Xiong,
  • Haiming Zhao,
  • Yimin Xia,
  • Can Weng,
  • Tao Zhang,
  • Anyang Tong

摘要

The main bearing is a crucial component of shield machines and its design has attracted great interest. In this paper, both static analysis and dynamic simulation models of the main bearing are developed. A comparative analysis shows that the load distribution obtained from the dynamic simulation model is closer to reality and serves as load input for the roller profiling design. An optimization equation for roller profiling is proposed, which takes into account multiple factors and has continuous ends. Under rated working conditions, using the proposed method, the main thrust roller reduces the maximum contact stress by approximately 11.49 % and 18.20 % compared to the ISO and Lundberg equations, respectively. Furthermore, under dynamic working conditions, the proposed roller profile design reduces the equivalent maximum contact stress by about 11.37 %, 21.68 %, and 9.28 % for the main thrust roller, auxiliary thrust roller, and radial roller, respectively, compared to the ISO profile scheme.