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A novel porous tilting pad bearing (PTPB) with umbrella-type dampers (UDs) is proposed to enable the oil-free operation of high-power turbomachinery. Viscoelastic material is embedded inside the umbrella damper. A mechanical model of UDs is presented based on the force method and the principle of energy conservation. A numerical model of the novel gas bearing is presented by coupling the PTPB model and the mechanical model of UDs. The effects of the geometrical parameters of UDs and operating conditions on the dynamic characteristics of the bearings are thoroughly discussed. The predictions show that the energy dissipation capacity of the UD increases with increasing negative Poisson’s ratio. Research results broaden the way of realizing dampers for use in oil-free environments.

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Dynamic Characteristics of a Novel Porous Tilting Pad Bearing with Umbrella-Type Dampers Featuring Negative Poisson’s Ratio

  • 会议论文

  • 发表日期：

    2026年

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  • Shaocun Han,
  • Jianwei Wang,
  • Kai Feng

摘要

A novel porous tilting pad bearing (PTPB) with umbrella-type dampers (UDs) is proposed to enable the oil-free operation of high-power turbomachinery. Viscoelastic material is embedded inside the umbrella damper. A mechanical model of UDs is presented based on the force method and the principle of energy conservation. A numerical model of the novel gas bearing is presented by coupling the PTPB model and the mechanical model of UDs. The effects of the geometrical parameters of UDs and operating conditions on the dynamic characteristics of the bearings are thoroughly discussed. The predictions show that the energy dissipation capacity of the UD increases with increasing negative Poisson’s ratio. Research results broaden the way of realizing dampers for use in oil-free environments.