Wear resistant slurry pumps are more prone to wear due to the special properties of the slurry they transport, as the slurry or tailings they transport are solid-liquid mixtures containing solid particles. During the Yuxing process, erosion wear, cavitation wear, chemical corrosion, and electrochemical corrosion are prone to occur. The overcurrent components of the slurry pump serve to protect the pump body, including the sheath, volute shell, protective plate (front and rear protective plates), secondary impeller, impeller, pressure relief cover, and so on. Once the sheath of the wear-resistant slurry pump fails, it will cause wear on the pump body. It can be seen that the role of the sheath is very important. When we encounter sheath failure problems, we should find the reasons from the following four aspects.
The rubber sheath of the slurry pump is a component used on the pump body, equivalent to the pump casing. Its main function is to reduce the wear of corrosive slurry on the pump body, thereby extending the service life of the slurry pump.
The reasons for the failure of the rubber sheath of the slurry pump are
1. Excessive wear and tear
The sheath is a component that comes into direct contact with a slurry containing a large amount of solid particles. The high-speed movement of the slurry will have a strong impact on the sheath, causing continuous wear and tear of the rubber sheath material. When the wear reaches a certain level, the rubber sheath fails and the slurry comes into direct contact with the pump body. At this time, the sheath should be replaced.
2. High temperature
We know that the high temperature resistance of rubber is not high. When it reaches a certain temperature, the rubber will soften, the wear resistance will decrease, and even burn. At present, although rubber has made some breakthroughs in high temperature, if the cooling system of the slurry pump is not good, the service life of rubber will be greatly shortened.
3. Severe cavitation
At the low pressure near the center of the impeller, water and gas form bubbles. When the bubbles flow with the slurry to a higher pressure area, they instantly burst or shrink, and the nearby slurry fills the void caused by the burst of bubbles at high speed. During this process, the slurry causes strong wear on the sheath.
4. Corrosion
Each type of rubber sheath has its own more suitable pH condition, and if it is higher or lower than this value, it will shorten the service life of the sheath.
