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<p>Aiming at the problem of stiffness and accuracy of hybrid bearing, a&#xa0;new type of hybrid bearing with tilting pads is proposed in this paper. This bearing decouples dynamic pressure and static pressure, ensuring the bearing’s load-bearing characteristics at low speeds and dynamic characteristics at high speeds, while also facilitating independent control of dynamic and static pressure performance. Based on the decoupling characteristics of this bearing structure, a&#xa0;lubrication model for the bearing is established, and a&#xa0;bearing performance calculation method based on the synthesis of balance point performance is proposed. For the case study bearing, the performance under different speeds and load directions is analyzed, and the influence of the pivot point position of the tilting pad on bearing performance is discussed. As the pivot point coefficient increases, the bearing stiffness first increases and then decreases, while the minimum film thickness decreases monotonically. With the increase in preload coefficient, the bearing stiffness increases monotonically, and the minimum film thickness decreases monotonically. Under the conditions that the stiffness and temperature rise limits are satisfied, the adjustable range of the tilting pad pivot point under different working conditions is determined. As the speed increases, the adjustable range gradually decreases. The research presented in this paper provides a&#xa0;theoretical basis and data support for the development of precision, high-stiffness milling machine spindle systems.</p>

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Lubrication model and performance adjust and control of a tilting pad hybrid bearing

  • 期刊论文

  • 发表日期：

    2025年8月27日

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  • Runlin Chen,
  • Weihao Chen,
  • Rushen Deng,
  • Yimo Wang,
  • Fan Xu,
  • Xiaotuan Wang

摘要

Aiming at the problem of stiffness and accuracy of hybrid bearing, a new type of hybrid bearing with tilting pads is proposed in this paper. This bearing decouples dynamic pressure and static pressure, ensuring the bearing’s load-bearing characteristics at low speeds and dynamic characteristics at high speeds, while also facilitating independent control of dynamic and static pressure performance. Based on the decoupling characteristics of this bearing structure, a lubrication model for the bearing is established, and a bearing performance calculation method based on the synthesis of balance point performance is proposed. For the case study bearing, the performance under different speeds and load directions is analyzed, and the influence of the pivot point position of the tilting pad on bearing performance is discussed. As the pivot point coefficient increases, the bearing stiffness first increases and then decreases, while the minimum film thickness decreases monotonically. With the increase in preload coefficient, the bearing stiffness increases monotonically, and the minimum film thickness decreases monotonically. Under the conditions that the stiffness and temperature rise limits are satisfied, the adjustable range of the tilting pad pivot point under different working conditions is determined. As the speed increases, the adjustable range gradually decreases. The research presented in this paper provides a theoretical basis and data support for the development of precision, high-stiffness milling machine spindle systems.