The problems of hot oil pump seal

the three major problems of the hot oil pump seal:
and use of the existing mechanical seal and its auxiliary system, in the process of heat pump operation, varying duty operation. Pump fit, wrong operation, such as artificial flow control all mechanical seal under variable working condition. When the pressure of seal medium produce volatile, can cause the mutual impact, friction pair end surface damage, thus affecting sealing effect; If seal chamber pressure fluctuation and instantaneous into negative pressure operation, corrugated pipe shrinkage and not timely recovery, oil film seal is formed between dynamic and static friction pair was damaged due to sudden leakage failure.
, working medium temperature is very high, plus the end face of the friction heat seal friction pair, once the flushing system fails, make end face temperature rise sharply, lead to end liquid film vaporization dry friction, in a short period of time can make the seal failure; Secondly, high temperature performance, also can make the graphite ring can be serious with impregnant melting; Again, when the action took the pairing of tungsten carbide and graphite ring material, high temperature can make the graphite ring ( Static ring surface annular grooves, tungsten carbide, Ring is easy to fall off; Friction pair in the end, the heat thermal deformation is larger, the friction state changes, cause sealing system failure in advance.
and high operation cost, large amount of energy.