A method of reducing windage power loss of a high-Speed motor using a viscous vacuum pump
A method of reducing windage power loss of a high-Speed motor using a viscous vacuum pump
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一种利用粘性真空泵减少高速电机风阻功率损失的方法
DOI：
10.1016/j.precisioneng.2016.11.005
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Takuma Yamauchi
中科院分区：
文献类型：
--
作者：
Fumiya Asami;Masaaki Miyatake;Shigeka Yoshimoto;Eitaro Tanaka;Takuma Yamauchi
提出了一种采用螺旋槽粘性真空泵与气动阶梯止推轴承相结合来降低高速转子风阻功率损失的新结构。所提出的结构可以通过利用螺旋槽的泵送作用将空气从电动机壳体的密封空间中泵出，从而减少转子的风力损失。此外，利用气动阶梯推力轴承与支撑真空泵平板的弹性材料之间的力平衡，在转子与粘性真空泵之间自动形成微小间隙。数值计算表明，在转速为30,000 rpm时，该结构可以将电机壳体密封空间内的压力降低到0.02 MPa，间隙为10 μm。此外，在10,000 rpm转速下的计算结果与实验结果进行了比较，两者吻合较好，表明所提出的结构对于降低高速电机的风损具有重要意义。
A new structure for reducing the windage power loss of a high-speed rotor using a spiral grooved viscous vacuum pump combined with an aerodynamic step thrust bearing is proposed. The proposed structure can pump out the air from within the sealed space of the motor housing by using the pumping effect of the spiral grooves and thereby reduce the windage power loss of the rotor. In addition, a small gap was automatically formed between the rotor and the viscous vacuum pump by using the force balance between the aerodynamic step thrust bearing and the elastic material supporting the flat plate of the vacuum pump. It was numerically shown that the proposed structure could reduce the pressure in the sealed space of the motor housing to 0.02 MPa at 30,000 rpm at a gap of 10 μm. In addition, the calculated results at 10,000 rpm were compared with the experimental results and showed good agreement and the proposed structure was very useful in reducing the windage power loss of a high-speed motor.