转子式压缩机泵体压插管力与螺钉拧紧力矩关系的分析与验证OA北大核心CSTPCD

In order to improve the product capability and energy efficiency of rotary compressors,a coupled design method for the pressure insertion tube force and screw tightening torque of the rotary compressor pump body was proposed through theoretical analysis,which ensures that the radial clearance design parameters of the pump body do not change during the machining process.First of all,the insertion force is controlled by adjusting the interference fit of 12.7～39.1 μm and the length of 9 mm,so that there is no working medium leakage at the joint and no lateral displacement of the pump body will occur.Secondly,considering that the tightening torque of the cylinder screw is 5 N·m,under the premise of ensuring that the friction force produced by the cylinder screw is sufficient to resist the transverse force produced by the pressure tube insertion and the maximum differential pressure of the gas when the pump body is working,the tightening torque of the screw is the smallest,so that the stress and deformation between the related parts are minimized.The feasibility of the theoretical method was verified through experiments,and the error between the two was within 5%,achieving an improvement in product performance.The research results can provide reference for the optimization design of rotary compressors.