What is the Function of a Slurry Pump Shaft Sleeve?

The shaft sleeve of a slurry pump is a key component inside the pump body, mainly used to protect the pump shaft, reduce wear, and extend the service life of the equipment. Shaft sleeves are made of materials such as 3Cr13, 304, 316, and ceramic sprayed materials.

• Protecting the pump shaft
  The medium transported by slurry pumps contains high-concentration abrasive particles (such as ore pulp, coal slime). As a "protective shield", the shaft sleeve wraps around the pump shaft, directly withstanding particle scouring and preventing the pump shaft from rapid wear or corrosion.

• Reducing maintenance costs
  Shaft sleeves are usually made of wear-resistant alloys with high hardness and are replaceable. When the shaft sleeve is worn, only the sleeve needs to be replaced instead of the entire pump shaft, thus reducing costs.

• Assisting in sealing
  It cooperates with mechanical seals or packing seals to prevent slurry from leaking into the bearing box. For example, in the auxiliary impeller + packing seal structure, the shaft sleeve can stabilize the pressure in the seal chamber and reduce medium leakage.

• Reducing vibration and eccentricity
  Through precision machining, the shaft sleeve ensures coaxiality with the pump shaft, avoiding vibration and bearing damage caused by shaft eccentricity.

Generally, a slurry pump shaft sleeve needs to be replaced when deep grooves (with a depth exceeding 2mm) appear on its surface. Alternatively, if leakage persists even after replacing the packing at the packing position, replacing the shaft sleeve should be considered.