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1. Repair after the wear of the driving shaft and bushing of the mining multistage pump

Due to the weight of the driving gear of the mining multistage pump and the radial thrust generated when the driven gear meshes, it is easy to cause the shaft and the bushing hole to be eccentrically worn and the gap to increase. big. Therefore, the engine oil will leak due to the increase of the gap during work, and the oil supply will decrease. After the drive shaft and the bushing are worn, the fit clearance can be restored by repairing the journal or bushing. When the journal is slightly worn, it is only necessary to press out the old bush and replace it with a new one, and the shaft generally does not need to be repaired, so that the fit clearance can be restored to the allowable range. When the wear of the shaft and the bushing is serious and the fit gap increases greatly, not only the bushing needs to be replaced, but also the diameter of the shaft should be increased by chrome plating or vibration surfacing, and then ground to the standard size to restore the shaft journal and Bushing fit requirements.

2. Repair after the inner cavity of the pump casing and the gear teeth are worn

内腔后的多级泵cas雷竞技官网最新版ing and the teeth of the mining multi-stage pump are worn, the oil volume of the multi-stage pump for mining is greatly affected. When the shaft and the bushing or the shaft hole are severely worn, there will be undue contact between the top of the tooth and the surface of the inner cavity of the pump casing during operation. And because the pressure of the oil outlet chamber is higher than that of the oil inlet chamber, under the action of the pressure difference, the top of the tooth contacts more with the oil inlet chamber of the pump casing, so the inner chamber of the pump casing wears more here, so that the inner chamber and the teeth The head gap increases. As a result, the pressure difference between the inlet and outlet chambers of the oil pump is reduced, which reduces the oil scraping and oil pressure effects of the gear teeth, resulting in a drop in oil supply pressure and a reduction in the pump oil volume. The wear of the inner cavity of the pump casing is generally repaired by the inner cavity inserting method. Secondly, due to the wear of the gear teeth in the direction of tooth thickness, the meshing gap between the main and driven gears increases. Its wear feature is heavy wear on one side, so the gear can be turned 180 degrees for use.

3. Repair after wear of the gear end face and the pump cover
There is a certain gap between the gear end face and the inner plane of the mining multi-stage pump cover, which is called the end face clearance. The wear of the contact surface between the end face of the gear and the inner plane of the pump cover during work will increase the gap between the end faces, and when it exceeds the limit, it will have a significant impact on the oil volume of the mine multi-stage pump. When the end face of the gear is worn, the end face can be ground flat, and at the same time, the disassembled surface of the oil pump casing can be ground to ensure that the end face clearance of the mine multistage pump is within the required range.