旋叶式压缩机小孔和间隙泄压数值模拟分析及实验研究

Numerical Simulation and Experimental Study on Pressure Relief of Small Holes and Clearances of Rotary Vane Compressor

通过研究旋叶式压缩机滑片尾部压力控制形式,发现在排气阶段需要对滑片尾部压力进行提升。结合压缩机运动规律,一般采用小孔、间隙两种泄压方式增加阻力,达到提升滑片尾部压力的目的。本文通过简化模型,采用有限元仿真和单项试验方法得到两种泄压方式的泄漏量。通过对比,间隙泄压方式泄漏量较少,可以有效提高滑片尾部压力。同时仿真结果与试验结果具有较好的一致性,该仿真方法对泄压结构及参数设计具有指导意义。

By studying the pressure control mode of vane tail in rotary vane compressor, it is found that the pressure of vane tail needs to be increased in the discharge stage. Based on the movement of compressor, small hole and clearance are generally used to increase the resistance, so as to increase the pressure of vane tail. In this paper, finite element simulation and single test method are carried out to get the leakage of two pressure relief methods in a simplified model. The results show that the leakage of clearance is less than that of small hole, which can effectively improve the pressure of vane tail. In addition, the simulation results are in good agreement with the test results. The simulation method has guiding significance for the design of pressure relief structure and parameters.