Date: 2013-08-20

Bearing seal selection of materials and processing

We know that the bearing seal is composed by a number of parts, and its information is to select the role of press parts, structural requirements and utilization condition. This chapter simply introductions the Friction Group of materials and other components. Friction Group data in a sense, the Friction Group it is mechanical properties, chemical properties, the friction characteristics of the integrated application. Assurance the seal friction Vice lasting use life and good sealing properties the Friction Group data, should pay attention to the following criterion:
(1) wear resistance is one of the most important indicators of the friction pair information, that is, less wear, and use of long life.
(2) good corrosion resistance. The result of wear will reduce the use life, corrosion will increase the clearance of the end surface, the medium leaked increased.
(3) bearing, high strength. To prevent the generation of strength destroyed and the end face of the deformation, it is necessary to have some bearing strength.
(4) a good heat resistance and heat conduction performance. The wear of the frictional heat will give an adverse impact, in order to avoid friction pair of thermal stress is greater than the item promised stress, there are conducive to the maintenance of the liquid film between the end surface, the end face of item must have a good heat resistance and thermal conductivity.
(5) a small coefficient of friction and have certain self smoothness.
The friction coefficient directly affect the size of the frictional heat is not in abundant smooth end face friction in many cases, and thus the Friction Group on the choice of the information necessary to think about these two elements.
To date, a data simultaneously meet the above request. Selection, should be the main factor affecting the sealing performance and reasonable mechanism design compensation data lack, as far as possible to meet the request of the sealing.

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