Ngawi shengda packing company

Hebei doors and Windows sealing strip manufacturers Small make up Tell you the hydraulic seal of important role

If the seal of a hydraulic pneumatic components products do not pass, then the hydraulic pneumatic components products, it is not a good product. There are many factors that can affect the seals. First, stress is an important factor affecting the seal is good or bad, high and low pressure, change the length of the pressure cycle, to seal damage (such as extrusion) has a great influence. The higher the pressure, the greater the other factors that affect the performance of the seal, such as temperature, speed, seal material, the clearance between the piston and cylinder, the clearance between the piston and cylinder head. Another is temperature with friction, of a kind of seal material used the highest temperature and minimum temperature it is difficult to describe, because this is the result of a series of comprehensive influence.

　　For the working temperature of piston and piston rod is different, to make a difference to their choice. Another is seal product surface roughness, surface features, pressure, medium, temperature, seal material, seal type and speed of movement these are the factors that affect the seals. The last one is the surface treatment, experience has shown that the characteristic on the surface of a cylinder piston and piston rod seal life has very big effect. Surface roughness RA value to define surface features, RA is the arithmetic mean surface shape deviates from the center line of absolute value. But some numerical cannot fully shows the effect of surface condition of seal, this is because even in the same roughness, different surface shape feature can lead to different to seal the wear degree of the seals.