Gear pump maintenance methods

　   1, gear pump drive shaft and bushing repair after wear

Gear pump drive shaft and bush wear with the gap increases, will certainly affect the pump oil.This situation can repair the drive shaft or bushing method to restore its normal fit clearance.If the drive shaft wear slightly pressure Replace the standard bushing after the old bushing, with the gap can be restored to the allowable range.If the drive shaft and bushing wear serious and serious with the gap not only to replace the bushing, and the drive shaft also applies chrome or vibration Surfacing method to increase its diameter, and then grinding to the standard size, with the bushing to restore the requirements.

2, the repair of the lubricating oil pump shell crack repair

Oil pump shell cracks 508 cast nickel-copper welding electrode weld should be close to the hole with the pump cover the flatness error of not more than 0.05 mm.

3, gear pump drive shaft bushings and driven shaft hole wear repair

Oil tank truck gear pump drive shaft bushings bore hole can be used to eliminate wear traces after reaming method, and then with increased to the appropriate size of the bushing. Driven shaft hole reaming method to wear and tear to eliminate wear marks and then reaming The actual size of the hole configures the driven shaft.

4, gear pump pump cavity cavity repair

Gear pump pump housing lumen wear after the general use of the lumen inlaid method to repair, the cavity is enameled big set with cast iron or steel bushings. After setting the cavity lining, seat repair: pressure limiting valve with ball valve And the plunger valve two spherical seat wear a ball on the valve seat, and then gently tap the metal ball until the ball valve and valve seat so close, such as the valve seat wear serious first Reaming to remove the wear marks and then use the law to make it close.Lock valve seat wear can be put into a little valve sand grinding until the close.

5, gear pump cover repair

Oil pump work plane repair: If the KCB gear pump pump cover wear a small work surface, manual grinding method can be used to eliminate wear marks, that is, put a little valve in the platform or thick glass sand and then put the pump cover on the grinding until worn Traces to eliminate the work surface until smooth.When the pump cover working surface wear depth of more than 0.1 mm should be taken after the first turning grinding method to repair.