In fact, the shaft end seal has always been a common problem in the design and manufacture of forced concrete mixer at home and abroad. In order to improve the technical content of concrete mixer, improve the sealing problem of shaft end of mixer, improve the performance of the whole machine, and enhance the market competitiveness, the R & D and design team of our company focused on the principle of shaft end seal after searching for data from many parties, and proposed a new one Design idea:
              

　　1.改变密封形式，采用浮动密封加油脂密封的形式，前后形成四道机械密封；

　　1. Change the seal form, adopt floating seal and grease seal, form four mechanical seals before and after;

　　2.改变密封圈与内浮封座的接触面形式；

　　2. Change the contact surface form between the seal ring and the inner floating seal seat;

　　3.密封圈采用特殊材质，提高密封效果，延长密封件使用寿命；

　　3. The seal ring is made of special material to improve the sealing effect and prolong the service life of the seal;

　　4.加油系统采用四个立泵芯分别向四个轴头供油，避免了使用分流阀的堵塞，减少维修和保养的工作量；

　　4. Four vertical pump cores are used in the refueling system to supply oil to the four shaft heads respectively, so as to avoid the blockage of diverter valve and reduce the workload of repair and maintenance;

　　5.轴端加装润滑油检测点，以检测润滑油脂是否真正到达轴头。

　　5. Install lubricating oil detection point at the shaft end to detect whether the lubricating grease really reaches the shaft head.