In routine repair Gear pump There will be problems such as lack of pump oil, or even no oil. * The reason is that the relevant parts are excessively worn. The wearing parts * of the gear pump should include the driving shaft and bushing, the center hole and shaft pin of the driven gear, the pump casing cavity and gear, the gear end face and the pump cover. After the lubricating oil pump is worn out, if its technical guidelines fail to meet the requirements, it shall be disassembled and differentiated, the wear position and level shall be checked, and the corresponding methods shall be accepted for correction.

1、 Correction gear after the driving shaft and bushing are worn. After the driving shaft and bushing are worn, their clearance will increase, which will affect the oil volume of the pump. The normal clearance can be recovered by repairing the driving shaft or bushing. If the driving shaft is slightly worn, just press out the old bushing and replace it with a standard size bushing, and the clearance together will recover to the allowable limit. If the driving shaft and bushing are severely worn and the gap between them is severely overspent, it is not only necessary to replace the bushing, but also the driving shaft is enlarged in diameter by chrome plating or oscillatory surfacing, and then grinded to the standard size to recover the requirements with the bushing.

2、 Repair of lubricating oil pump shell Repair of shell crack: shell crack can be repaired by welding with 508 nickel copper welding rod. The weld must be tight and free of pores, and the flatness error of the connecting surface with the pump cover shall not be greater than 0.05 mm. Repair of wear of driving shaft bushing hole and driven shaft hole: after the driving shaft bushing hole is worn, the reaming method can be used to eliminate the wear traces, and then the bushing with corresponding size shall be used. The driven shaft hole wear is also eliminated by reaming, and then the repair of the driven shaft pump casing inner cavity is prepared according to the practical dimension of the reamed hole: after the pump casing inner cavity is worn, it is generally accepted that the inner cavity inlay method is used for correction, and the inner cavity of the single precipitator is expanded and then inlaid with cast iron or steel bushings. After the bushing is inserted, the inner cavity shall be lined to the required dimension, and the bushing protruding from the end face shall be polished to make it flush with the connecting surface of the pump casing. Repair of valve seat: there are two types of pressure limiting valve: ball valve and plunger valve. After the ball valve seat is worn, a steel ball can be placed on the valve seat, and then the steel ball can be knocked quietly with a metal rod until the ball valve and the valve seat close together. If the valve seat is severely worn, it can be reamed to remove the wear mark, and then the upper method can be used to make it close. After the plunger valve seat is worn, a small amount of valve sand can be put in for grinding until the sealing stops.

3、 Repair of the pump cover Repair of the mission plane: If the wear of the mission plane of the pump cover is small, manual grinding can be used to eliminate the wear traces, that is, put a small amount of valve sand on the platform or thick glass plate, and then put the pump cover on it for grinding until the wear traces are eliminated, and the mission surface is flat. When the wear depth of the mission plane of the pump cover exceeds 0.1mm, the method of turning first and then grinding shall be adopted for correction. Repair of dust remover bag cage driving shaft bushing hole: repair of driving shaft bushing hole wear on the pump cover is the same as repair of housing driving shaft bushing hole wear. 4、 The turning over of the gear uses the gear pump to wear the gear * If it is at the tooth thickness, the wear of the gear end face and the tooth top is relatively light. The gear is worn unilaterally at the tooth thickness, so the gear can be turned 180 degrees for use. When the end face of the gear is worn, the end face can be ground flat, and the connecting surface of the lubricating oil pump housing can also be ground to ensure that the gap between the end face of the gear and the pump cover is within the standard limit. IMO agent , IMO screw pump , ALLWEILER