Reasons for aging of bearings in high corrosion and wear resistant multistage pumps

Category: Water pump knowledge

2025-05-15

High corrosion-resistant and wear-resistant multi-stage pumps, as important fluid conveying equipment, are widely used in many fields. Their core components—bearings—experience aging during use, affecting their performance and service life. The following are the main reasons for the aging of bearings in high corrosion-resistant and wear-resistant multi-stage pumps.

I. Mechanical Stress Factors

1. Fatigue stress: During high-speed operation, bearings are subjected to periodic alternating stresses, leading to material fatigue, crack generation, and eventual aging.

2. Friction and wear: When the pump conveys media containing solid particles, the bearing surface is worn, reducing precision and performance.

II. Chemical Corrosion Factors

1. Chemical media corrosion: For high corrosion-resistant and wear-resistant multi-stage pumps, although the bearing material has high corrosion resistance, it will still be eroded when in long-term contact with strongly corrosive media, leading to changes in material properties.

2. Corrosion fatigue: The interaction between the chemical medium and the bearing surface causes changes in the material's microstructure, accelerating the expansion of fatigue cracks.

III. Physical Factors

1. Temperature effects: When bearings operate in high-temperature environments, the mechanical properties of the material change, leading to reduced strength and easy aging.

2. Poor lubrication: Insufficient lubrication or aging of lubricating oil leads to increased bearing friction, accelerating wear and aging.

IV. Operation and Maintenance Factors

1. Overload operation: When the pump operates in an overloaded state, the load on the bearing increases, leading to stress concentration and accelerated aging.

2. Improper maintenance: Failure to replace lubricating oil or clean bearings in a timely manner will worsen the bearing operating environment and accelerate aging.

To extend the service life of bearings in high corrosion-resistant and wear-resistant multi-stage pumps, the following measures should be taken:

1. Select appropriate bearing materials and lubrication methods.

2. Optimize the pump's operating environment and avoid overload operation.

3. Strengthen equipment maintenance, and regularly check the wear condition of the bearings.

4. In environments with severe chemical corrosion, select bearing materials with better corrosion resistance.

In summary, the causes of bearing aging in high corrosion-resistant and wear-resistant multi-stage pumps are diverse, involving mechanical, chemical, physical, and operational maintenance aspects. Understanding these causes and taking appropriate measures can extend the service life of the bearings and improve the pump's performance and reliability.

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