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为了研究以波箔型径向气体箔片轴承为支承的轴承-转子系统动力学特性,专门设计了波箔型径向气体箔片轴承试验台,质量为0.458kg的转子在该试验台上实现了超过80 000r/min的运转速度.径向轴承为波箔型径向气体箔片轴承,止推轴承为多叶箔片轴承.试验结果表明:波箔型径向气体箔片轴承能够实现转子高速运行,在转子起飞后具有良好的运行稳定性,其轴承支承处振动位移幅值一直维持在20μm之内.由于驱动涡轮受到不平衡气流力的作用,转轴升速时的起飞转速要高于降速时的起飞转速.
In order to study the dynamic characteristics of the bearing-rotor system supported by the foil-type radial gas foil bearing, the foil-type radial gas foil bearing test bench was specially designed and the rotor with the mass of 0.458kg was realized on the test bench The operating speed of more than 80 000r / min. Radial bearings for the foil-type radial gas foil bearing, thrust bearing for the multi-lobe foil bearing test results show that: the foil-type radial gas foil bearing can achieve the rotor High speed operation with good running stability after rotor take-off, the vibration displacement amplitude of the bearing support has been maintained within 20μm.Because the turbine driven by the unbalanced air force, the take-off speed when the shaft speed up is higher than Take-off speed when slowing down.