径向柔性涡旋压缩机接触冲击模型分析  

Contact impact model analysis of radial flexible scroll compressor

作　　者：刘涛[1] 金晓娜 汪贺银 麻德权 LIU Tao;JIN Xiao-na;WANG He-yin;MA De-quan(School of Mechanical and Electrical Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学机电工程学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2025年第2期31-37,共7页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(52265034)。

摘　　要：针对径向柔性涡旋压缩机由啮合误差引起的动、静涡旋齿间泄漏问题,基于接触动力学相关理论和动、静涡旋齿啮合原理,提出了动、静涡旋齿啮合碰撞冲击概念,建立了涡旋压缩机啮合接触冲击动力学模型.同时,采用Lankarani-Nikravesh非线性弹簧阻尼碰撞力模型建立了考虑啮合误差激励的动、静涡旋齿径向间隙接触碰撞模型.运用有限元数值计算方法,对2个模型在啮合点的变形量进行计算,研究在径向啮合接触碰撞力作用下涡旋压缩机的冲击模型.结果表明:在啮合冲击激励下单个压缩周期内,动、静涡盘的涡旋齿变形量随着主轴转角的增大而增大;啮合接触冲击动力学模型与动、静涡旋齿径向间隙接触碰撞模型的啮合点变形趋势一致;动、静涡旋齿径向间隙接触碰撞模型的碰撞恢复系数对碰撞变形具有一定影响,因而通过调整碰撞恢复系数可以为啮合点的初始间隙取值提供依据,也可以为控制涡旋压缩机的径向泄漏提供新思路.Aiming at the leakage problem between dynamic and static scroll teeth caused by the meshing error of radial flexible scroll compressor,based on the contact dynamics theory and the meshing principle of dynamic and static scroll teeth,the concept of meshing collision impact between dynamic and static scroll teeth is put forward,and the meshing contact impact dynamic model of the scroll compressor is established.Based on Lankarani-Nikravesh nonlinear spring damping impact force model,a contact impact model of radial clearance between dynamic and static scroll teeth considering meshing error excitation is given.The deformation at the meshing point of the two models is calculated by the finite element numerical calculation method to investigate the impact model of scroll compressor under a radial meshing contact impact force.The results show that the deformation of scroll teeth increases with the increase of spindle rotation angle under meshing impact excitation in a compression period.The deformation trend at the meshing point obtained from the meshing contact impact dynamic model is consistent with that obtained from the radial clearance contact impact model of dynamic and static scroll teeth.Furthermore,the impact recovery coefficient in the radial clearance contact impact model of dynamic and static scroll teeth also has some influence on the impact deformation.Therefore,the initial clearance of the meshing point can be determined by controlling the collision recovery coefficient,and a new idea for controlling the radial leakage of the scroll compressor can be provided.

关 键 词：径向柔性 位移激励 啮合接触冲击 瞬态动力学 

分 类 号：TH455[机械工程—机械制造及自动化]