Static seals and sealing conditions of SKF imported bearings

SKF imported bearing tightness test is often an assessment of the assembly and working reliability of the assembled cylinder seal and its joints, such as the sealing and connection of the cylinder port, the cylinder piston (with the rod cavity and the rodless cavity) , static seals and sealing conditions. Because the test pressure is very large, especially for the pressure test of the rodless cavity, if there is no tooling to withstand the pressure exerted by the piston without the rod cavity and exert a large pressure on the piston rod through the piston, it is absolutely impossible to bear by the connection of the cylinder port. of. Therefore, for such pressure test, after carefully assembling the oil cylinder, it is carried out in the commissioning stage of the final assembly machine.

   The frame of the machine to which the cylinder belongs is subjected to a large pressure. If there is no problem in the assembly of the cylinder, the cylinder will be smooth in the final assembly pressure test, which not only saves the tooling that is separately tested after the cylinder is assembled, but also saves the corresponding working hours, and also shortens the production cycle. Favorable; if there is a problem in the assembly of the cylinder, it will be exposed during the assembly and commissioning. It will be unloaded to disassemble the new assembly, but it will take time and labor to affect the production progress, which is not worth the loss. This is often the result of the operator's inability to carefully examine and work hard.

   Therefore, before assembling SKF bearings, it is necessary to carefully check whether the dimensional accuracy of the relevant parts conforms to the drawings. The failure of the sealing parts is often caused by the dimensional accuracy of the sealing groove or the roughness of the sealing surface is not up to the requirement, and secondly to the sealing parts. The geometry should be carefully examined, especially for the inspection of the sealing lip. Seals with irregular shapes, lack of meat, micro cracks, etc., cannot be placed in the product.

   In addition, the material and hardness of SKF imported bearing seals should be checked against the product certificate and delivery list. For example, the O-ring has four pressure levels from I to 1 to I and four, and its bearing capacity is also different from low to high. Especially for those who have no experience, the seal of the same specification is often from the outside. It is difficult to distinguish. If the low-pressure sealing ring is accidentally installed in the high-pressure part, it is thought that there will be no problem in the assembly process. As a result, the sealing member is easily broken down during the test or work, resulting in seal failure or a significant shortened service life, and its influence and loss can be imagined. And know.