Repair Method Of Sanitary Centrifugal Pump Bushing After Wear

1.Sanitary Centrifugal Pump Repair of worn driving shaft and bushing

After the driving shaft and bushing of the gear pump are worn, the clearance increases, which will inevitably affect the pump oil volume. In this case, the driving shaft or bushing can be repaired to restore its normal clearance. If the driving shaft is slightly worn, just press out the old bushing and replace it with a bushing of standard size, and the clearance can be restored to the allowable range. If the driving shaft and bushing are severely worn and the clearance exceeds the standard, not only the bushing should be replaced, but also the driving shaft should be chrome-plated or vibrated to increase its diameter, and then ground to the standard size and restored to the bushing. Matching requirements.

2. Repair of lubricating oil pump housing and repair of housing cracks

The cracks in the oil pump housing can be repaired with cast 508 nickel-copper welding rods. The weld must be tight and the flatness error of the gas hole and the oil pump cover joint surface should not exceed 0.05 mm.

3. Repair of wear on the active shaft bushing hole and the driven shaft hole of the sanitary centrifugal pump

After the wear of the active shaft bushing hole of the sanitary centrifugal pump, the wear marks can be eliminated by reaming, and then the bushing enlarged to the corresponding size can be used. The wear of the driven shaft hole can also be eliminated by reaming, and then the driven shaft can be equipped according to the actual size of the hole after reaming.

4. Repair of the inner cavity of the pump casing of a sanitary centrifugal pump

After the inner cavity of the pump casing of a sanitary centrifugal pump is worn, the inner cavity is generally repaired by the inner cavity sleeve method, that is, the inner cavity is enlarged and then inlaid with a cast iron or steel sleeve. After the sleeve is inlaid, the inner cavity is enameled and the valve seat is repaired: There are two types of pressure limiting valves: ball valves and plunger valves. After the ball valve seat is worn, a steel ball can be placed on the valve seat, and then the steel ball is gently tapped with a metal rod until the ball valve and the valve seat are tightly fitted. If the valve seat is severely worn, it can be reamed to remove the wear marks and then the above method can be used to make it fit tightly. After the plunger valve seat is worn, a little valve sand can be put in and ground until it fits tightly.

5. Repair of the pump cover of a sanitary centrifugal pump

Repair of the working plane of the oil pump: If the working plane of the pump cover of a sanitary centrifugal pump is less worn, the wear marks can be eliminated by manual grinding, that is, a little valve sand is placed on a platform or thick glass plate and then the pump cover is placed on it for grinding until the wear marks are eliminated and the working surface is flat. When the wear depth of the working plane of the pump cover exceeds 0.1 mm, it should be repaired by turning first and then grinding.