Actual results show that the mechanical seals failure of the sealing elements is dynamic and static ring face, pump seals dynamic and static ring bad beacause there is a common failure cracking phenomenon,
Main reasons:
① Install the sealing surface when the gap is too large, fluid too late to take away the heat generated by friction; fluid leakage from the sealing surface of the gap to go, resulting in overheating and damage to the face.
② vaporization of liquid medium expansion, so that both ends of the surface by the vaporization and expansion of force to separate the sealing surface when the two hard lamination, resulting in damage to face the surface of lubricant film overheating.
③ poor lubrication liquid medium, combined with operating pressure overload, two sealing surface tracking rotation is not synchronized. Such as high-speed pump speed 20445r/min, center sealing surface diameter of 7cm, the pump speed up its operation after the 75 m / s, when there is a lag can not track the rotating sealing surface, resulting in transient high-temperature sealing surface damage.
④ fluid sealing plate or filter clogged, causing water shortage, the mechanical seal failure.
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