How to adjust the concentricity of a high corrosion and wear resistant multistage pump

Category: Water pump knowledge

2025-05-21

High-corrosion-resistant, wear-resistant multi-stage pumps are widely used in chemical, pharmaceutical, and metallurgical fields. The stability and reliability of their performance are crucial for the continuity of the production process. Concentricity is one of the important parameters of the pump, affecting the pump's operating efficiency and lifespan. Therefore, adjusting the concentricity of the high-corrosion-resistant, wear-resistant multi-stage pump is particularly important.

I. Preparations before adjustment

1. Ensure a clean working environment with sufficient operating space.

2. Prepare the necessary tools, such as a spirit level, vernier caliper, and jack.

3. Understand the pump's structure and performance parameters in detail.

II. Specific adjustment steps

1. Preliminary inspection: Check if all parts of the pump are intact and undamaged, and check the tightness of the fasteners.

2. Installation and positioning: Install the pump in the designated location, ensuring that the foundation is level and stable.

3. Adjust coaxiality: Use a spirit level and vernier caliper to check the coaxiality of the pump shaft. If there is a deviation, it can be corrected by adjusting the pump's foundation bolts or bearing clearance.

4. Adjust concentricity:

(1) Use a dedicated tool, such as a dial indicator, fix it to one end of the pump, and make it contact the other end;

(2) Observe the reading of the dial indicator and adjust the concentricity by adjusting the position of the bearing or adding/removing shims;

(3) Adjust repeatedly until the dial indicator reading is within the allowable range.

5. Recheck and confirm: After adjustment, recheck the coaxiality and concentricity to ensure that they meet the standard requirements.

III. Precautions

1. During the adjustment process, ensure the safety of personnel and avoid accidental injuries.

2. Adjust gently to avoid damaging the equipment.

3. After adjustment, conduct a test run to check whether the pump runs smoothly and whether there are any abnormal sounds.

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