Why does the hydraulic press system pressure leak

Why does the pressure of the hydraulic press system leak? What are the main reasons leading to the leak. Today, Xiaobian will take you to understand what are the reasons for the pressure leakage of the hydraulic press system.

1. Oil press pipe joints and oil plugs, most of the pipe joint oil leakage occurs in the integrated block, valve base plate, pipe components and other pipe joint connection parts, when the pipe joint is connected with metric thread, the screw hole center line is not vertical sealing plane, that is, the geometric accuracy and processing dimensional accuracy of the screw hole do not meet the requirements, will cause the combination gasket seal is not strict and leakage. When conical pipe thread is connected, the thread and plug can not fit perfectly, which is easy to leak oil. Once the above two situations occur, it is difficult to cure, and only liquid sealant or polytetrafluoroethylene raw material belt can be filled and sealed.

2. The oil leakage between the plate valve, superimposed valve and other joint surfaces is mainly: the collision with the O-ring mounting surface, scratch, installation screw length, insufficient strength, will produce oil leakage. Solution: deal with the above problems separately

3. There are many reasons for the oil leakage of the hydraulic cylinder of the hydraulic press, such as the adhesion of dust and mud on the surface of the piston rod, salt spray, surface bump, partial load and other reasons will cause seal damage and failure to cause oil leakage. The solution is to try not to make the hydraulic cylinder bear partial load, often erase the dust on the piston rod, pay attention to avoid bumps and scratches, and do a good job in the cleanliness of the hydraulic oil management.

4. Temperature rise and heating cause more serious leakage phenomenon, which can make the oil viscosity decrease or deteriorate, so that the internal leakage increases; If the temperature continues to increase, it will cause the sealing material to expand and increase the friction after being heated, accelerate the wear, and cause the axial rotation or sliding part to leak soon. O-ring expansion and deformation cause thermal aging, can not be restored after cooling, lose elasticity and failure, gradually produce leakage.

Through the above points to show that in normal times to often maintain the oil press. In this way, the hydraulic press will not have too many failures, and it can make the hydraulic press have a longer life.