无油涡旋压缩机齿端面密封机构的设计  

Structural Design on Tooth Seal of Oil-Free Scroll Compressor

作　　者：李海生[1] 陈英华[1] 吴开波[1] 张小卫[1] 王建松[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州221116

出　　处：《润滑与密封》2015年第3期13-16,共4页Lubrication Engineering

基　　金：国家自然科学青年基金项目(51105362)

摘　　要：针对涡旋压缩机齿端面介质泄漏的特点,提出一种齿端面密封机构模型,通过齿端面开设的密封槽内安装自润滑材料密封条和弹簧,实现涡旋齿轴向间隙的密封。通过分析不同位置的密封条所受压差力情况,将密封条的工作状态分为无压差和有压差2种工况,分别建立密封机构的简化力学模型,通过密封条和动涡盘的受力分析,研究弹簧力、压差力和背压气体力3种载荷对密封机构工作过程的影响。结合受力分析结果,从密封槽深度、弹簧位移、背压腔直径等三方面,实现密封机构的结构设计,获得满足密封机构正常工作时的结构参数取值范围,为涡旋齿端面密封机构的设计提供了理论依据。According to the leakage characteristics of the scroll tooth of scroll compressor, a mechanism model of sealing was presented in order to realize the sealing of axial clearance.The mechanism model consists of the seal element, and the seal element is made of self-lubricating materials and spring and is installed into the seal groove of scroll tooth.Through analyzing the differential pressure force of different positions, there are two kinds of working conditions for seal element, including with differential pressure condition and without differential pressure condition.The simplified mechanical model of the sealing mechanism was established according to the different working conditions ,respectively.Through force analysis of the seal element and the orbiting scroll, the working process of the sealing mechanism under the action of the spring force, pressure difference and back pressure force of the orbiting scroll was studied.The structure design of the sealing mechanism was discussed in the light of the force analysis results in order to insure the normal work of sealing mechanism, and the structural parameters＇ ranges were obtained, including the spring displacement, the seal groove depth and the diameter of back pressure cavity.

关 键 词：涡旋压缩机 密封机构 密封条 压差力 

分 类 号：TH45[机械工程—机械制造及自动化] TH136