1, pump repair (1) pump crack repair. Generally can be cast 508 nickel-copper welding rod welding, welding requirements after the weld tight no air hole, and the pump cover surface flatness error should not exceed 0.05mm. (2) Repair of shaft bushing hole and driven shaft hole after wear. After the shaft bushing hole is worn out, the reaming method can be adopted to eliminate the wear marks, and then insert the bushing with an enlarged size; after the driven shaft hole is worn, the reaming method is also used to eliminate the wear marks, and then the reamed hole is pressed. The actual size, the preparation of the diameter of the larger size of the driven shaft. (3) Repair of the pump casing after wear. Generally used to repair the ring set in circles. After the inner chamber has been enlarged, cast iron or steel rings are fitted. After inserting the ring, the inner cavity is then raked to the required standard size, and the ring protruding from the end face is ground off so that it is flush with the decomposition surface of the pump casing. (4) Seat repair after wear. After the spherical valve seat is worn out, a steel ball can be placed on the valve seat and the steel ball can be tapped several times with a metal rod until the ball valve is in close contact with the valve seat. If the valve seat is worn out, it can be controlled first. 2. Repair of the pump cover (1) Repair of the work surface of the pump cover after wear. When the wear depth of the working plane of the pump cover exceeds 0.1mm, it should be repaired. When the working level of the pump cover is small, the manual grinding method can be used to eliminate the wear marks, that is, the pump cover is placed on the platform or the thick glass plate, and the valve sand is added between the work surface of the pump cover and the surface of the platform for grinding. When the amount of wear is large and there is serious unevenness, the method of first grinding and then grinding should be adopted. (2) Repair of the active shaft shot hole after wear. The repair method is the same as that of the active shaft sleeve hole on the housing.
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