Six kinds of gear pumps and maintenance of various components

1, the drive shaft and bush wear After repair gear pump drive shaft and bush wear, with the gap increases, will certainly affect the pump oil. In this case, you can repair the drive shaft or bushing method to restore its normal with the gap. If the drive shaft wear slightly, simply press the old bushing and put on the standard size bushing, with the gap can be restored to the allowable range. If the drive shaft and bushing wear serious and serious with excessive clearance, not only to replace the bushing, and the drive shaft also applies chrome or vibration welding method to increase its diameter, and then grinding to the standard size, recovery and bushing With the requirements.

2, drive shaft bushing hole and driven shaft hole wear Repair drive shaft bushing hole wear, the reaming method can be used to eliminate wear marks, and then with increased to the appropriate size of the bushing. Driven shaft hole wear and tear to reaming method to eliminate wear marks, and then press the hole reaming the actual size of the preparation of the driven shaft 3, the repair of the oil pump housing crack shell repair available 508 nickel-copper welding electrode Make up Welds to be close and yuan stomatal, with the flatness of the pump cover with no more than 0.05 mm flatness.

4, the pump chamber cavity repair Pump chamber cavity wear, the general cavity set method to repair, about enlarging the cavity after the set with cast iron or steel bushings. Inlaid, the cavity enamel 5, the valve seat repair: pressure limiting valve with a ball valve and plunger valve two. Ball seat wear, the ball can be placed on a valve seat, and then gently tap the metal ball, until the ball valve and valve seat so close. If the valve seat is worn seriously, first remove the worn marks by reaming, and then use the method to make it close. Plunger seat wear, you can put a little valve sand grinding until close together.

5, the pump cover repair work plane repair: If the pump cover wear a small plane, manual grinding method to eliminate wear marks, that is, put a little valve on the platform or thick glass plate sand, and then put the pump cover on the ground , Until the wear marks disappear, the work surface is flat so far. When the pump cover working surface wear depth of more than 0.1 mm, should be taken after the turning grinding method to repair.

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