This paper aims to study the bearing performance with different cone angle errors, to study the effect law of manufacturing taper error on the properties of gas foil conical bearing (GFCB).,For the GFCB supported by separated bump foil strips, a nonlinear structure stiffness model considering Coulomb friction and arch characteristics was proposed. The finite element method and finite difference method were used to solve the Reynolds equation and the film thickness equation by coupling, and the properties of the GFCB were obtained. The effect of foil and bearing structure parameters on the static and dynamic performance under different taper error cases was analyzed. Moreover, a test on the air compressor supported by GFCBs was conducted to verify the practicability.,The taper error has a largely adverse effect on the load capacity of GFCB. When the taper error is −0.03°, the radial load capacity Fr and axial load capacity Fz decrease by 37.5 and 58.3%, respectively. The taper error decreases the direct stiffness and cross-coupled damping of GFCB, which will weaken the bearing stability. Moreover, the performance of GFCB is closely related to the foil and bearing parameters.,The taper error adversely affects the static and dynamic characteristics of GFCB, which should be concerned by bearing designers, researchers and academicians.,The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-03-2020-0089/

中文翻译：

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锥度误差对气箔圆锥轴承性能的影响

本文旨在研究不同锥角误差下的轴承性能，研究制造锥度误差对气体箔圆锥轴承（GFCB）性能的影响规律。,对于由分离的凸箔条支撑的GFCB，非线性结构刚度提出了考虑库仑摩擦和拱特性的模型。采用有限元法和有限差分法对雷诺方程和膜厚方程进行耦合求解，得到GFCB的性能。分析了不同锥度误差情况下箔片和轴承结构参数对静、动态性能的影响。此外，对GFCB支撑的空压机进行了试验验证其实用性。锥度误差对GFCB的负载能力有很大的不利影响。当锥度误差为-0.03°时，径向承载能力Fr和轴向承载能力Fz分别降低37.5%和58.3%。锥度误差降低了GFCB的直接刚度和交叉耦合阻尼，从而削弱了轴承的稳定性。而且GFCB的性能与箔片和轴承参数密切相关,锥度误差对GFCB的静态和动态特性产生不利影响，应引起轴承设计者、研究人员和院士的关注。,本文同行评审历史可在：https://publons.com/publon/10.1108/ILT-03-2020-0089/