Bearing sealing failure of elimination method

Seal is extremely important for bearing, if sealing parts problems will cause great impact on bearing, such as irregular shape, short of tiny crack defects such as meat, the seal is not possible. Bearing sealing test is on after assembly cylinder sealing parts and assessment of the reliability of the joint assembly and work. Crock mouth seal and connection such as cylinder, cylinder piston ( There are no bar and rod cavity) The dynamic and static seals and sealing condition, etc. Bearing the leakage test pressure is very big, especially for the rodless cavity pressure test, without tooling, by the rodless cavity pressure testing and through a lot of pressure acting on the piston rod, piston, if only the connection to withstand oil crock mouth is absolutely not. Therefore, this type of pressure testing is usually after carefully oil cylinder assembly, to enter assembly machine commissioning phases. 一个。 Improper assembly method and trunnion bearing or bearing hole of the interference is small, with pressure into the method of assembly. The simplest method is to use copper bar and hammer, according to certain order way symmetry on bearing seat with interference fit, the bearing pressure into the smoothly. In addition, also can use soft metal casing borrowed hammer into or press press. If improper operation, it will make the seat deformation craze, or a hammer hit the interference fit in the seat, will make the raceway and rolling body produces indirect indentation or bearing was damaged. B。 Assembly time when improper temperature control bearing assembly, if its interference with diameter of axle is bigger, generally USES the hot pack assembly. The bearing in cans containing oil, engine oil barrels outside with hot water or flame heating, heating process requirement of the oil temperature control at 80 ℃ ~ 90 ℃, generally will not exceed 100 ℃, most will not exceed 120 ℃. Bearing heated rapidly remove the suit on the journal. If improper temperature control heating temperature is too high, the bearing causes tempering hardness due to lower, in the operation of the bearing is easy to wear and spalling, and even cracking. C。 Improper assembly clearance adjustment of rolling bearing clearance is divided into radial clearance and axial clearance, its function is to guarantee the normal operation of the rolling body and lubrication and compensating thermal elongation. For bearing clearance can be adjusted, because of its axial gap and radial gap there is a direct proportion relationship between, so the installation is adjust axial clearance can be obtained as long as the radial clearance, but they are usually in pairs ( In the ends of the shaft or end) And, therefore, only need to adjust a bearing axial clearance. Generally, gasket, is used to adjust axial clearance, some screw or thrust ring adjustment is also available.