The function of the back blades of the front and rear cover plates of the slurry pump impeller

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• TIME : 2024-12-05

A slurry pump is a type of pump specifically designed to transport liquid mixtures containing solid particles. Its impeller design includes front and rear cover plates and back blades, which play a crucial role in the operation of the pump. The following are the specific functions of the back blades of the front and rear cover plates of the slurry pump impeller:

1. Balance axial force

Back blades can help balance the axial force of the impeller. Axial force is caused by the pressure difference at different positions inside the pump. If not controlled, it may lead to axial displacement of the pump, affecting its stable operation. The back blade, through its special structural design, can to some extent counteract this axial force, thereby protecting the bearings and other key components of the pump.

2. Self cleaning function to prevent slag accumulation

The back blade also has a self-cleaning function, which can prevent solid particles from accumulating between the impeller and the pump casing. This is particularly important for slurry pumps, as they typically handle media containing large amounts of solid particles. The rotational motion of the back blade can agitate the liquid, prevent solid particles from depositing, and thus maintain the efficient operation of the pump.

3. Sealing function, reducing the pressure in the sealing chamber

The back blade is located near the back of the impeller cover plate, which can play a sealing role and reduce the pressure in the sealing chamber. This helps reduce the possibility of liquid leakage from high-pressure areas to low-pressure areas and improve the overall efficiency of the pump. In addition, the back blade can also reduce axial force, making balance easier to achieve and more cost-effective than using balance tubes and balance holes.

4. Dynamic sealing to reduce seal leakage

As a part of the dynamic seal, the secondary impeller (i.e. the back blade) can further reduce the pressure in the sealing chamber and minimize seal leakage. This is particularly important for handling media containing solid particles, as it can prevent solid particles or other impurities from entering the sealing chamber, thereby extending the service life of the seal.

conclusion

In summary, the back blades of the front and rear cover plates of the slurry pump impeller play an important role in balancing axial forces, self-cleaning, sealing, and dynamic sealing. These functions not only improve the operating efficiency of the pump, but also extend its service life, ensuring the reliable operation of the pump under harsh working conditions.

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(Editor in charge: Slurry Pump https://www.fuyangpumps.com/)

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