一、前言卧轴式砼搅拌机的轴端密封设计至少应考虑到如下一些问题:(1)能有效地防止砂浆对轴承的浸蚀和磨蚀,保证拌轴的正常运转;(2)使用寿命长,工作可靠性好;(3)结构紧凑,安装空间小,装卸简单,便于维护保养;(4)具有经济的价格,较为方便的配套件供应。旋转轴的密封设计方法很多,但就一般 I. INTRODUCTION The design of the shaft end seal of the horizontal shaft type concrete mixer should at least take into account the following issues: (1) It can effectively prevent the erosion and abrasion of the mortar on the bearing and ensure the normal operation of the shaft; (2) Long service life , The work reliability is good; (3) The structure is compact, the installation space is small, the loading and unloading is simple, and the maintenance is easy; (4) It has the economical price and the supply of the more convenient accessory parts. There are many ways to design a rotary shaft seal, but in general