In this paper, the design and experimental verification of the rotor system with gas foil bearings are carried out with a vehicle compressor developed in our laboratory. The designed rotating speed 100,000 rpm with 50 g/s mass flow and 1.8 pressure ratio. The journal foil bearing with inhomogeneous bump foil is designed and tested by a push-pull device to evaluate the structure stiffness of bump foil. The result shows that the stiffness curves of two bearings with the same manufacturing process are not consistent, which indicates the uncertainly in the manufacture of foil bearings and it is necessary to obtain the foil stiffness data by experiment. A multi-disc model is established to simulate the impeller in the finite element model (FEM) for the vehicle compressor is too short to ignore the impeller width. The stiffness and damping coefficients of foil bearings are used to proceed rotordynamic analysis. The vibration experiments indicate that with the operating speed enhancement, the center orbit falls smaller. When the rotating speed increases to about 60,000 rpm, two sub-synchronous frequency occur and remain at 150 and 307 Hz finally. Two radial acceleration peaks appear at 9736 and 25,828 rpm respectively, which are close to the critical speed of damped Campbell diagram. The compressor performance map shows that the pressure ratio of the compressor is slightly lower than the design value due to the eccentricity of the foil bearing, which can be solved by increasing the operating speed. This paper provides some reference value for the design and experiment of vehicle compressor supported by the foil bearings.

在本文中，使用我们实验室开发的车载压缩机进行了带有气箔轴承的转子系统的设计和实验验证。设计转速为 100,000 rpm，质量流量为 50 g/s，压力比为 1.8。采用推拉装置设计并测试了具有不均匀波箔的轴颈箔片轴承，以评估波箔的结构刚度。结果表明，相同制造工艺的两个轴承的刚度曲线不一致，说明箔片轴承制造存在不确定性，需要通过实验获得箔片刚度数据。在有限元模型（FEM）中建立了多盘模型来模拟叶轮，因为车用压缩机太短而忽略了叶轮宽度。箔片轴承的刚度和阻尼系数用于进行转子动力学分析。振动实验表明，随着运行速度的提高，中心轨道下降得更小。当转速增加到 60,000 rpm 左右时，出现两个次同步频率，最终保持在 150 和 307 Hz。两个径向加速度峰值分别出现在 9736 和 25,828 rpm，接近阻尼坎贝尔图的临界速度。压缩机性能图显示，由于箔片轴承偏心，压缩机压比略低于设计值，可通过提高运转速度来解决。本文为箔片轴承支撑的车载压缩机的设计和试验提供了一定的参考价值。