What are the precautions for repairing the wear of the gear oil pump of the diesel generator set? First of all, the repair after the wear of the driving shaft and the bushing of the gear oil pump of the diesel generator set, due to the weight of the driving gear of the oil pump itself and the radial thrust generated by the meshing of the passive gear, it is easy to the shaft and the bushing hole are eccentrically worn, and the clearance increases. Therefore, during operation, the oil will leak due to the increased clearance, and the oil supply will be reduced. After the driving shaft and the bushing of the diesel generator set are worn, the matching clearance can be restored by repairing the journal or repairing the bushing. When the journal wear is slight, it is only necessary to press out the old bushing and replace it with a new bushing, and the shaft generally does not need to be repaired, so that the fitting clearance can be restored to the allowable range. When the shaft and bushing are severely worn, the fitting clearance increases. When it is very large, not only the bushing should be replaced, but the shaft should also be enlarged in diameter by chrome plating or vibration surfacing, and then ground to the standard size to restore the matching requirements of the journal and the bushing.
Repair after the wear of the inner cavity of the pump casing and the gear teeth, the wear of the inner cavity of the pump casing and the gear teeth has a great influence on the pump oil quantity. When the shaft and the bushing or the shaft hole are seriously worn, the tooth tip and the surface of the inner cavity of the pump casing will have undue contact during operation. In addition, because the pressure of the oil outlet cavity is higher than that of the oil inlet cavity, under the action of the pressure difference, the tooth tip is in more contact with the oil inlet cavity of the pump casing, so the inner cavity of the pump casing wears more here, so that the inner cavity and the tooth are in contact with each other more. Top gap increases. As a result, the pressure difference between the inlet and outlet chambers of the oil pump is reduced, the oil scraping and oil pressure effects of the gear teeth are reduced, the oil supply pressure is lowered, the pump oil volume is reduced, and the wear of the inner chamber of the pump casing is generally carried out by the inner chamber sleeve method. be repaired.
Secondly, due to the wear of the gear teeth in the direction of the tooth thickness, the meshing gap between the main and passive gears increases. Its wear characteristics are that the wear on one side is heavier, so the gear can be turned 180 degrees for use. Repair after the wear of the gear end face and the pump cover, there is a certain gap between the gear end face of the diesel generator set and the inner plane of the pump cover. The end face clearance is called the end face clearance. The wear of the contact surface between the gear end face and the inner plane of the pump cover during operation will increase the end face clearance. When the limit is exceeded, it will have a significant impact on the pump oil volume. When the end face of the gear is worn, the end face can be ground flat, and the decomposition surface of the oil pump casing can be ground at the same time to ensure that the end face clearance of the pump is within the required range.
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