Let's explain what vulnerable parts the water pump has and how to maintain the water pump.
Vulnerable parts are the most vulnerable parts of water pumps, which need special care during use, repair and maintenance. So what are the vulnerable parts of the pump? What should I pay attention to?
1. The shell of water pump is generally cast iron, which is easy to crack under the action of mechanical force or thermal stress. In winter, when the water pump freezes due to cavitation impact or the accumulated water in the pump shell cannot be released, it is also easy to break. If the damage is serious and beyond repair, the pump housing should be replaced with a new one.
2. The water pump shaft is generally made of carbon steel, but it is also easy to be damaged due to manufacturing quality, use or installation. There may be cracks, bending, journal wear, thread damage, etc. Fracture accidents may also occur on the pump shaft. If the damage is serious and beyond repair, replace the shaft with a new one.
3. Impeller is an important working part of water pump, which is made of cast iron. It is also easy to be damaged due to manufacturing quality and use. Cracks may occur in the impeller, and holes or perforations may be formed on the surface due to cavitation. After a long period of cleaning and wear, the blade may become thinner or eccentric, or even crushed by debris. Some defects can be repaired; Some defects cannot be repaired, that is, the impeller should be replaced with a new one.
4. The bearing bush of sliding bearing is made of copper-tin alloy, which has poor wear resistance and is one of the most easily worn and burned parts. Generally speaking, bearing shells can be repaired or replaced with new ones. The average service life of general rolling bearings is 5000 hours, but it is easy to wear or damage if it is improperly installed, used for a long time or poorly maintained. Rolling bearings generally need to be replaced as a whole, and individual parts can be replaced with new ones.
5. Mouth ring, also known as leakage reduction ring or wear reduction ring, is one of the most easily worn parts in water pump. It can be repaired or replaced with a new one after wear. When replacing a new leakage reduction ring, its inner diameter should be configured according to the outer diameter of the impeller inlet. If the outer diameter of the impeller inlet is worn, the groove marks and ellipses can be eliminated by turning, and then the leakage reduction ring with reduced inner diameter can be configured. Generally, the outer diameter of the impeller inlet can turn three times.
6. When the filler is used for a long time, it will harden and lose its elasticity, making the water pump leak. Usually, new packing should be replaced.
7. Water pump oil seal is a rubber product, which is easy to wear and age, and generally needs to be replaced with a new one.