国产黄A片免费网站免费,无套内谢少妇毛片A片打工皇帝 ,高清一区二区三区日本久,少妇高潮A片无套内谢麻豆传

收縮
  • QQ咨詢

  • 在線咨詢
  • 點擊這里給我發(fā)消息
  • 電話咨詢

  • 86-578-2633999
18867831888

Current location:Home>

Bearing seal 

Source:https://baike.so.com/doc/5328210-5563382.html     Release time:2018/11/20 15:17:00

Bearing seal can be divided into two categories, own seal and seal. The so-called bearing with seal is made bearing itself into a sealing device. Such as bearing with dust cover, sealing ring, etc. This seal take up the space is small, easy installation and disassembly, cost is low.

Alleged bearing and sealing device, it is inside the installation end cover manufacturing into a sealing device has a variety of performance.

The choice of bearing and seal should consider the following several major factors:

1. Bearing lubricant and types (grease and lubricating oil);

2. The size of the bearing work environment, take up the space;

3. Shaft supporting structure advantages, allowing the angular deviation;

4. The circumference of the sealing surface speed;

5. The working temperature of bearing;

6. The manufacturing cost.

According to the bearing working condition and working environment requirement for sealing on the engineering design is often integrated use of various seal form, in order to achieve better sealing effect.