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Causes of slurry pump wear and measures to reduce wear
Published:
Dec 25,2024
The slurry pump, as a key industrial equipment mainly used in industries such as mining, coal washing, petroleum and natural gas, wastewater treatment, ports and hydraulic engineering, and construction projects, should pay attention to monitoring the condition of the slurry pump and daily maintenance during regular use to avoid wear on the slurry pump and its components. This article mainly introduces the main reasons for the wear of slurry pumps and measures to reduce wear.
The main causes of wear of slurry pumps include the following aspects:
1. Scouring of solid particles: During the operation of the slurry pump, the solid particles carried in the liquid impact the surface of the flow-through parts at a certain speed, causing material loss. This wear mechanism includes cutting wear, deformation fatigue wear and cutting + deformation composite wear.
2. Corrosion: When the transported medium has a certain pH, the flow-through parts of the slurry pump will also suffer from corrosive wear, that is, the loss of materials under the combined action of corrosion and wear.
3. Friction: During the operation of the slurry pump, friction will occur between the internal parts, resulting in wear of the parts. Especially in the sealing parts of the pump, such as shaft seals and mechanical seals, friction and wear are particularly serious.
4. Impact: Cavitation may occur inside the pump, that is, bubbles generated in the local low-pressure area burst instantly in the high-pressure area, generating impact force. This impact force will cause wear and even damage to the impeller, pump casing and other parts of the pump.
Measures to reduce the wear of slurry pumps include:
1. Select wear-resistant materials: Commonly used wear-resistant materials include high-strength alloy steel and ceramics. These materials have excellent hardness and wear resistance, and can effectively resist the impact and wear of solid particles. When selecting materials, factors such as medium characteristics, working conditions and economic costs should be considered comprehensively.
2. Optimize design: By optimizing the structure and flow channel design of the slurry pump, the impact force and wear degree of solid particles and liquids when flowing inside can be reduced. For example, measures such as adding guide plates and using impellers of special shapes can reduce erosion wear and cavitation wear.
3. Surface treatment: Surface treatment of important parts of slurry pumps, such as spraying wear-resistant coatings, plating or nitriding, can increase the hardness and wear resistance of parts, thereby extending their service life. ,
4. Reasonable design of impeller geometric parameters: Selecting a larger blade inlet diameter and outlet width can reduce the relative speed at the impeller inlet, reduce impeller wear and prevent blockage.
5. Optimize the matching between volute and impeller: The best matching with the impeller should be considered during design, and the velocity of the liquid flow in the volute should be minimized to reduce wear.
Keyword:
Zha Jiang Peng,The use of slurry pumps,Causes of wear in slurry pumps
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