Heat pump seal the three major problems

Heat pump seal there are three major problems: 1, the use of existing mechanical seal and its ancillary systems, high temperature pump in the operation process, variable operating conditions occur from time to time. Pump pumping, misuse, man-made flow regulation so that the mechanical seal is in variable working conditions. When the pressure of the sealing medium fluctuates violently, it can cause mutual impact of the friction pairs and damage the end faces, which will affect the sealing effect. If the sealing chamber pressure fluctuates and instantly becomes negative pressure, the bellows shrinks and can not recover in time. The dynamic and static friction Vice film between the formation of the oil seal is damaged caused by sudden leakage failure. 2, the working medium temperature is very high, coupled with the frictional heat of the seal friction end face, once the flushing system fails, the temperature of the end face is sharply increased, resulting in dry friction of the liquid film on the end face and short of the seal, , High temperature can also make graphite ring performance degradation, severe immersion agent can melt; Third, when the static and dynamic ring material to take tungsten carbide and graphite pairing, high temperature graphite ring can also ring (ring) surface ring groove, carbonation Tungsten (moving ring) is also easy to fall off; finally, the frictional heat deformation under high temperature causes the friction state of the end surface to change, leading to the early failure of the sealing system. 3, high operating costs, energy consumption.

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