Overhaul of the mechanical seal

Mechanical seals are composed of two sealing elements (static ring and ring) perpendicular to the axis, smooth and flat surface bonded to each other and relative to the rotation of a sealing means. It is sealed by a pressure medium in the rotating ring contact surface of the stationary ring together (end) to generate an appropriate pressing force, so that the two end faces closely, face the maintenance of a very thin layer of the liquid film to seal strap purposes. This layer of liquid film has a dynamic pressure and static pressure of the liquid and plays the role of lubricating co counterweight.
1 a cleaning and inspection of the mechanical seal
1) The working principle of the mechanical seal mechanical seal requirements without any impurities inside. In the assembly of mechanical seal thoroughly before cleaning ring, stationary rings, bushings and other components.
2) Check the static ring surfaces for scratches, cracks and other defects, which poses a serious mechanical seal leakage. Conditions can be checked with a special tool sealing surface is smooth, sealed surface is not flat, the pressure of water will enter the assembly of the movement after the mechanical seal ring sealing surface, will separate the static ring, mechanical seal failure. When necessary, can be made before assembly tooling hydrostatic test.
3) check whether there is movement affect the sealing ring seat defects. Such as movement and movement ring seat ring seal mating surface for defects.
4) Check the mechanical seal spring compensation for damage and deformation, stubborn coefficient is changed.
5) Check that the sealing sleeve existence of burrs, grooves and other defects.
6) Check all gasket sweeping the presence of cracks, holes and other defects, whether the diameter measurement apron within tolerance.
7) has a pumping mechanism of screw pump mechanical security seals also check whether there is a spiral line cracks, breakage and other defects.