The specific operation method of replacing the mechanical seal of the rotor pump

1. Remove the cap nuts on the rotor chamber cover of the rotor pump and remove the cover of the rotor pump.

2. Use a copper rod or wooden block to wrap between the two rotors and use a wrench to remove the two rotor retaining nuts of the rotor pump. Note: The normal factory-configured device drive shaft fixing nut is clockwise to relax, and the driven shaft fixing nut is counterclockwise to relax.

3. Pull out the two rotors by hand. (If you can't pull out the rotor by hand, please follow step 4)

4. Remove the two fixing nuts from the rotor chamber and hammer the back sides of the rotor chamber with a copper rod until the rotor chamber can be removed by hand. (If the rotor is not removed when the third step is operated, the rotor will also be taken out together with the rotor chamber.) Note: At this time, it can be seen that there are adjustment shim at the shoulders of the two transmission shafts, please do not remove them easily. Remove, please remember to adjust the number of shim in this position, so that it can be installed in the original position and quantity when reassembling.

5. Attach the complete O-ring, static ring, wave plate spring and 3 pins to the rotor chamber of the rotor pump.

6. Slide the complete moving ring assembly onto the shaft from the shaft end. If a new type of moving ring combination is used, the two screws on the moving ring sleeve should be screwed on the two planes of the shaft, but the nails should not be fastened on the shaft, so that the moving ring sleeve can be rotated by about 5° on the shaft. The sleeve is rotated 360°. Then add a small amount of paint or grease to the screw holes to prevent the screws from falling off during operation.

7. Install the rotor chamber onto the gearbox of the rotor pump and press it into place against the cabinet. (The rotor chamber and the gearbox assembly position have two tapered pin positions). Insert two locating pin holes with iron rods, and hammer the two locating pins separately so that the rotor chamber is in the original factory position, and lock the two rotor chamber fixing nuts back and forth. Note: After assembling the rotor chamber, if the adjustment shim has been removed when removing the rotor chamber, please install the shim in the original position and the original quantity.

8. Install the rotor in the rotor chamber, use a copper rod or wooden block between the two rotors, and fix the two rotors with a wrench. Note: 1. The rotor, rotor fixing nut and drive shaft are numbered at the factory. Please assemble the parts with the same number when assembling, and you can see the respective numbers after this step is completed. 2. The fixing nut on the normal factory configuration is counterclockwise tightened, and the lower fixing nut is clockwise tightened.

9. Rotate the rotor fixing nut one turn in the locking direction with a wrench to detect the gap between the rotor and the rotor. The gap between the rotor of the rotor pump and the inner and bottom planes of the rotor chamber should be approximately the same, without rubbing.

10. With a flat ruler placed at different positions on the end face of the rotor chamber, the gap between the rotor and the flat ruler should be measured and the gap measured in step 9 should be approximately the same, without rubbing.

11. Assemble the rotor chamber cover of the rotor pump on the rotor chamber, and ensure that there are two right-angled sides around the chamber cover flush with the rotor chamber to lock the respective cap nuts.

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