Features of slide vane pumps and precautions during operation

Sliding vane pumps are used for transporting any acidic, alkaline, or corrosive media； It is used in industry, urban water supply and drainage, as well as for irrigation and drainage in farmlands and orchards, for transporting clean water or other liquids with physical and chemical properties similar to those of clean water. The sliding vane pump has a compact and rational design, as well as good reliability. Under normal operating conditions, it generally does not require disassembly for maintenance; when a fault is detected, the cause should be identified and resolved. 1. Bearings. The bearings used in the pump are needle bearings, which do not need to be replaced during regular maintenance; they are replaced only when wear is severe enough to affect normal operation. 2. Sliding plate. The normal wear amount of the sliding vane is extremely small; when the wear becomes severe and exceeds 2 mm (referring to the wear at the contact area between the sliding vane and the inner wall of the pump chamber), the sliding vane must be replaced. 3. Pump end cover. Under normal conditions, the left and right end caps of the pump suffer very little wear, and the wear on both sides should be even. If excessive wear or uneven wear is detected during maintenance, the cause must be identified and addressed. 4. Mechanical seal. Mechanical seals should generally not be disassembled for inspection as long as there is no oil leakage. If severe oil leakage occurs at the lower leakage port of the pump end cover, the mechanical seal should be disassembled and inspected. When installing or removing mechanical seals, handle them gently and pay attention to the cleanliness of the mating surfaces. During installation and removal, it is necessary to protect the smooth surfaces of the rotating and stationary rings; hitting or knocking them is strictly prohibited. The main cause of leakage in mechanical seals is the roughening of the surfaces of the friction pairs; the repair method involves grinding these surfaces to restore their smoothness, or the friction pairs can be replaced. Another reason for leakage is improper installation or deformation and aging of the O-ring (the oil transfer pump is made of oil-resistant rubber); in such cases, it is necessary to adjust or replace the O-ring and reassemble the pump. 5. Safety valve. Safety valves generally do not fail, and it is strictly prohibited to open them under normal circumstances. If they become damaged, a new safety valve should be installed.