Purpose

The purpose of this paper is to study the characteristics of gas foil conical bearings (GFCBs) considering the misalignment, the static and dynamic performances with different misalignment cases were studied.

Design/methodology/approach

A test rig on the air compressor supported by GFCBs has been developed to measure the practicability. A nonlinear bump stiffness model and one-dimensional beam top foil stiffness model were used as a basis for the calculation of static and dynamic performance. The finite element method and finite difference method are adopted to solve the Reynolds equation and the film thickness equation coupled, in which different misalignment cases were considered by changing the film thickness.

Findings

The supporting performance of GFCB is excellent, and the film clearance plays a critical role. The misalignment effects depend on the assembled angle and the misalignment angle. The load capacity, friction torque, temperature of GFCB decrease when the misalignment assembled angle is between 120° and 240°, while the dynamic bearing stability is improved. The static and dynamic performances show the opposite law for the other assembled angles, and the misalignment effect is more dramatic when there is a larger misalignment angle. Moreover, the bearing and running parameters largely affect the bearing performance.

Originality/value

The present study focuses on the static and dynamic characteristics of GFCB and investigates the effects of misalignment on the bearing performance.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-04-2020-0117

中文翻译：

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考虑偏心的气箔圆锥轴承的特性

目的

本文的目的是在考虑偏心的情况下研究气箔圆锥轴承（GFCBs）的特性，研究不同偏心情况下的静态和动态性能。

设计/方法/方法

已经开发了由GFCB支持的空气压缩机的试验台，以测量实用性。非线性凸块刚度模型和一维梁顶箔刚度模型被用作计算静态和动态性能的基础。采用有限元法和有限差分法求解Reynolds方程和膜厚方程，通过改变膜厚考虑了不同的失准情况。

发现

GFCB的支撑性能非常好，膜间隙起着至关重要的作用。失准效应取决于组装角度和失准角。当未对中组装角在120°至240°之间时，GFCB的负载能力，摩擦扭矩，温度降低，同时动态轴承稳定性得到改善。静态和动态性能对于其他装配角度显示出相反的规律，并且当存在较大的未对准角度时，未对准效果更加明显。此外，轴承和运行参数在很大程度上影响轴承性能。

创意/价值

本研究关注GFCB的静态和动态特性，并研究未对准对轴承性能的影响。

同行评审

本文的同行评审历史记录可在以下网址获得：https://publons.com/publon/10.1108/ILT-04-2020-0117