What should be paid attention to in the maintenance of rotary vane vacuum pump?

1、 Remove the rotary vane vacuum pump from the vacuum system. First, remove the low vacuum end. After removing the rear end plate, take down the low vacuum rotor and key. Then remove the front end plate. Take out the vacuum rotor, rotor, spring, etc. remove the mirror, exhaust valve and exhaust cover. Clean all parts thoroughly with gasoline or alcohol. When disassembling, pay attention to the position, direction and combination of each part. The removed parts should be placed separately. It is not allowed to mix together and abrade each other. Check all parts and components to see if there is wear, scuffing, breakage and other adverse phenomena, and repair or replace according to the situation. Pay special attention to the large degree of scratch found on the front and rear end plates, which indicates that the rotor is not perpendicular to the middle diaphragm during assembly, and the locating pin should be adjusted. If it is too serious, it should be repaired or replaced. Check the clearance of rotary vane vacuum pump: put the high rotor into the high vacuum chamber and the low rotor into the low vacuum chamber respectively. Check the clearance with knife edge ruler and thickness gauge. The clearance at both ends should be basically equal.

2、 Clean and dry before assembly, and then assemble. First install the high vacuum end, lift the spring rotating piece into the high rotor, then put it into the high vacuum chamber, install the front end plate, then install the positioning pin, and tighten the screws evenly. After assembly, the rotation should be flexible, easy and uniform. Then install the low vacuum rotor and the rear end cover. The groove of the low rotor should be on the side of the rear end plate. Then install the exhaust valve. The exhaust valve piece should be close to the valve plate seat, and then install other parts.

3、 When assembling the rotary vane vacuum pump, it should be noted that the rotating parts should be filled with vacuum oil first, and attention should be paid to cleaning. It is strictly forbidden that iron chips, mud, sand and dust fall into the pump. The positioning pin should be in good contact. The installed rotary vane vacuum pump should be able to rotate easily without uneven rotating weight and blocking phenomenon. After the final assembly, add oil from the air intake nozzle and oil filling hole respectively, and install the oil of rotary vane vacuum pump at the horizontal line of the mirror, and then test run.