Steps/methods
1. The first possibility of water seepage in mechanical seals is the plane wear of dynamic and static rings of mechanical seals. There are six reasons for the plane wear of the dynamic and static rings of the engine seals.
2. Installation is too tight. Observing the plane of message ring of mechanical seal, if there is severe burning phenomenon, plane blackening and deep marks, sealing rubber hardens and loses elasticity, this phenomenon is caused by the installation of too tight. Solution: Adjust the installation height, after the impeller is installed, pull out the rotating spring with a screwdriver, the spring has a strong tension, after loosening, it will be complex lambda, with a moving interval of 2-4MM.
3. Installation is too loose. There is a thin layer of scale on the surface of the sealing and static ring plane of the observer, which can be erased without wear and tear. This is caused by the spring losing elasticity and poor assembly, or by the axial movement of the motor.
4. The water quality is poor and contains particles. Because of poor water quality and high hydrochloride content in small particles and medium, grooves and ring grooves are formed on the surface of abrasive wear machine seals or pulled surfaces. Solution: Improve the water pressure or medium, change the seal.
5. Water shortage causes dry wear and tear. This phenomenon is often seen in the bottom valve installation form of negative pressure at the entrance, air in the intake pipe, air in the pump chamber. When the pump is turned on, the friction of the machine seal produces high temperature when it runs at high speed, and can not be cooled. Check the machine seal, the spring tension is normal, the friction surface burns and blackens, and the rubber becomes hard and cracked. Solution: Despite the air in the passage and pump chamber, replace the mechanical seal.
6. cavitation. Cavitation mainly occurs in hot water pumps. Because the medium is hot water, the water temperature is too high to produce steam, the steam in the pipeline enters the pump chamber high, this part of the steam can not be eliminated, resulting in water shortage operation, seal dry grinding failure, cavitation installed automatic exhaust valve, replacement of seal.
Pump treatment method
1. The first possibility of water seepage in mechanical seals is the plane wear of dynamic and static rings of mechanical seals. There are six reasons for the plane wear of the dynamic and static rings of the engine seals.
Reason 1. Installation is too tight. Observing the plane of message ring of mechanical seal, if there is severe burning phenomenon, plane blackening and deep marks, sealing rubber hardens and loses elasticity, this phenomenon is caused by the installation of too tight.
Solution: Adjust the installation height, after the impeller is loaded, pull the rotating spring with a screwdriver, the spring has a strong tension, when it is loosened, it will be complex lambda, with a moving interval of 24 MM.
Reason 2. Installation is too loose. There is a thin layer of scale on the surface of the sealing and static ring plane of the observer, which can be erased without wear and tear. This is caused by the spring losing elasticity and poor assembly, or by the axial movement of the motor.
The third reason is that the water quality is poor and contains particles. Because of poor water quality and high hydrochloride content in small particles and medium, grooves and ring grooves are formed on the surface of abrasive wear machine seals or pulled surfaces.
Solution: Improve the water pressure or medium, change the seal.
Causes 4. Dry wear and tear caused by water shortage. This phenomenon is often seen in the bottom valve installation form of negative pressure at the entrance, air in the intake pipe, air in the pump chamber. When the pump is turned on, the friction of the machine seal produces high temperature when it runs at high speed, and can not be cooled. Check the machine seal, the spring tension is normal, the friction surface burns and blackens, and the rubber becomes hard and cracked. Solution: Despite the air in the passage and pump chamber, replace the mechanical seal.
Cause 5. Cavitation. Cavitation mainly occurs in hot water pumps. Because the medium is hot water, the water temperature is too high to produce steam, the steam in the pipeline enters the pump chamber high, this part of the steam can not be eliminated, resulting in water shortage operation, seal dry grinding failure, cavitation installed automatic exhaust valve, replacement of seal.
Reason 6. Assembly problem. When installing the pump cover, it is possible to install it flat, causing the shaft and the pump cover not vertical, causing the message plane not to coincide, the start-up time is not long, causing unilateral wear and seepage. It is also possible to damage the rubber parts or the surface of the message ring when installing the message ring.
Solution: Remove and reassemble, check whether the pump cover is flat or not.
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