The reason is too tightly installed. Observe the mechanical sealing dynamic static ring plane. If there is severe burning phenomenon, the plane is black and deep traces, the sealing rubber hardening (public account: pump steward), losing elasticity, this phenomenon is caused by too tight installation.

Reason two: Poor loose installation. Observation machine seals and static ring planes, the surface has a layer of thin dirt, which can be wiped off. The surface is basically no wear. This is caused by the loss of elasticity and assembly of the spring, or the axial movement of the motor.

Reason three, water quality difference contains particles. Due to poor water quality, the content of small particles and medium is high, and the plane or strain surface of the abrasive wear machine seal is generated to produce grooves and ring grooves.

Reasons IV, water shortage causes dry wear. This phenomenon is more common in the negative pressure of the underlying valve -type installation form. There is air in the water inlet pipe, and the air in the pump cavity has air. After the pump is turned on, the machine seal is high -speed when the rubbing of the machine can be cooled. The rubbing surface was scorched and black, and the rubber hard and cracking.

Reason five, qi erosion. Qi erosion is mainly produced in the heat pump. Because the medium is hot water, the water temperature is too high to generate steam, and the steam body in the pipeline enters the height of the pump cavity. This part of the auto body cannot be ruled out, which will cause water shortage and operation. Air valve, replacement machine seal.

Reason 6, assembly problem. When installing the pump cover, there may be no flat loading, causing the shaft and the pump cover to cause the dynamic plane to not match, and the boot time is not long, causing unilateral wear and water seepage. It is also possible that the rubber part is damaged when installing the static ring, or the moving ring surface is injured.