When we use the gear pump, we cannot avoid the wear of the gear pump, so many problems will occur. Therefore, we should learn the most common maintenance technology for the gear pump. When you have a problem, you can make an accurate judgment. Next, I will tell you about the most common maintenance techniques:
1. maintenance of the working plane: if the wear of the working plane of the pump cover is small, you can remove the wear marks by grinding yourself, that is, put a little valve sand on the platform or thick glass plate, and then put the pump cover on it for grinding until the wear marks are removed and the working surface is flat. If the wear depth of the working plane of the pump cover exceeds 0.1 mm, it should be repaired by turning and grinding first.
2. maintenance of driving shaft bushing hole: the maintenance method for the worn driving shaft bushing hole on the pump cover is the same as that for the worn driving shaft bushing hole on the housing.
Repair of pump casing inner cavity: after the pump casing inner cavity is worn, the inner cavity inlay method is adopted for repair, that is, cast iron or steel bushing is inlaid after the inner cavity is lined. After the sleeve is inserted, the inner cavity shall be lined up to the required size, and the bushing protruding from the end face shall be ground off to be flush with the joint surface of the pump housing.
3. maintenance of valve seat: there are two types of pressure limiting valves: ball valve and plunger valve. After the ball valve seat is worn, put a steel ball on the valve seat, and then gently tap the steel ball with a metal rod until the ball valve and the valve seat are tightly closed. If the valve seat is seriously worn, ream it to remove the wear marks, and then use the above method to make it close. After the plunger valve seat is worn, a little valve sand can be put into it for grinding until it is close.
The above is about the maintenance of the most basic parts of the gear pump. We may encounter different problems in other aspects in the process of application. We have to seriously discuss these different problems and find out the causes of the problems.
