How to Check the Sealing of Centrifugal Pump


Published:

Feb 22,2024

In order to ensure that there is no leakage of the mechanical seal after the centrifugal pump is assembled, it is essential to check the tightness of the centrifugal pump. The following is the specific operation method.

How to Check the Sealing of Centrifugal Pump

In order to ensure that there is no leakage of the mechanical seal after the centrifugal pump is assembled, it is essential to check the tightness of the centrifugal pump. The following is the specific operation method.

1. Measure the dimensions of the dynamic and static ring sealing surfaces. This data is used to verify the radial width of the dynamic ring. When different friction materials are used, the radial width of the friction surface of the hard material should be 1-3mm larger than the soft one, otherwise it will easily cause the edge of the end face of the hard material to be embedded in the soft material. The end face up.

2. Measure whether the length of the compensation spring changes. Changes in spring function will directly affect the mechanical seal end face pressure. Under normal circumstances, the length of the spring will shorten after long-term operation, and the mechanical seal that compensates the spring on the moving ring will also deform due to centrifugal force.

3. Check the clearance between the moving ring, the static ring and the shaft or sleeve. The inner diameter of the static ring is usually 1-2mm larger than the shaft diameter. For the moving ring, in order to ensure flotation, the inner diameter is 0.5-1mm larger than the shaft diameter. Compensate the vibration and deflection of the shaft, but the gap cannot be too large, otherwise the moving ring seal will get stuck and cause damage to the mechanical seal performance.

4. Measure the length of the anti-rotation pin of the static ring and the depth of the pin hole to prevent the pin from being too long and unable to assemble the static ring in place. This situation will damage the mechanical seal.

Keyword:

Centrifugal pump