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importance of sealing in KCB gear oil pump

Source:未知 Time:2021-06-30 21:25
The sealing surface quality directly affects the service life of the KCB gear oil pump, and the surface material of the sealing surface and the sealing surface are important factors to ensure the quality of the sealing surface.
Therefore, when selecting sealing surface material of KCB gear oil pump, consider the following factors:
 
(1) corrosion.
"Erosion", under the action of the medium, through the process of surface damage in the sealing surface.
If the surface is subjected to such damage, the seal cannot be guaranteed and, therefore, the sealing surface material must be corrosion resistant.
Corrosion resistance mainly depends on the extreme chemical stability of the material.
 
② Anti-scratch.
"Scratch" is the relative movement of the sealing surface that causes the material to be damaged by friction.
This damage will inevitably lead to the destruction of the sealing surface, therefore, sealing surface materials must have good wear resistance, especially the door.
The scratch resistance of a material is often determined by the internal properties of the material.
 
③ corrosion resistance.
"Erosion" is the medium that flows through the high speed sealing surface and destroys the sealing surface in the process.
In high temperature damage, high pressure steam used in the medium throttle valve seal has a great impact on the use of more obvious damage, therefore, corrosion resistance is also one of the important requirements of the sealing surface material.
 
④ should have a certain hardness and a large drop in hardness appears at the predetermined operating temperature.
 
⑤ Sealing surface and linear coefficient of expansion should be roughly blocky material, which is inlaid sealing structure is more important to avoid high temperature and easy to appear loosening caused by additional stress.
 
Under high temperature conditions, it has sufficient oxidation resistance, thermal fatigue resistance and thermal cycling and other problems.
 
In the current situation, it is difficult to find the sealing surface material in full compliance with the above requirements, can only rely on the type and purpose of the valve to meet certain requirements, focus.
For example, KCB should pay special attention to the requirements of anti-corrosion sealing surface when using gear pump in high-speed media;
The medium containing solid impurities should be selected for the higher surface hardness of the sealing material.
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