For rotor pumps, the largest consumable is a mechanical seal, which typically lasts 7000-8000 hours in continuous use. However, the conditions of use, the environment is not ideal, its service life will be greatly reduced. Learn reasonable and correct replacement of mechanical seals, rotor as far as possible to extend the service life, it is necessary. When replacing the mechanical seal, the rotor pump must be disconnected from the power supply. Prevent wounding during accidental start-up during seal replacement. The specific steps are as follows: Remove the rotor chamber cover cap each nut, remove the rotor chamber chamber cover. Use a copper rod or wood pad between the two rotors and remove the two rotor retaining nuts with a wrench. (Note: The loosening direction of the fixing nut can be judged according to the rotation direction of the shaft, that is, the loosening direction of the fixing nut is consistent with the rotation direction of the shaft.) Pull out the two rotors by hand. (If the rotor can not be pulled out by hand, proceed to step 4.) Remove the two fixing nuts in the rotor chamber and hammer the copper rod against the back of the rotor chamber until the rotor chamber can be removed by hand. (For example, if the rotor is not removed during step 3, the rotor will also be removed along with the rotor chamber.) Note: At this time, you may see adjustment shims at the two transmission shoulders. Record the adjustment thin The location and number of shims at the axis of the shim so that they can be loaded in place and in quantity for reassembly. Remove the need to replace the static ring and moving ring. Static Ring Installation: Align the intact static ring with the three pins on the rotor chamber, push the mounting holes of the rotor chamber evenly by hand until the O-rings on the static ring also enter the mounting holes. Installation of moving ring: push the intact moving ring into the driving shaft end until the bottom of the moving ring contacts the shoulder. The location of the two screws on the moving ring should coincide with the position of the second plane on the shaft. Gently screw the two screws on the moving ring until the bottom of the screw is in contact with the plane of the shaft and loosen one or two threads to make the moving ring rotate about 5 ° on the shaft. Remember not to move the moving ring Can rotate 360 ​​° on the shaft. Then drop a small amount of paint or grease into the screw holes to prevent the screws from coming off during operation. Carefully place the stationary ring fitted rotor chamber along the drive shaft and insert the two conical pins on the rotor housing into the two pin holes in the gearbox and into the rotor chamber mounting nuts and insert them into the rotor chamber with iron rods Two dowel pin holes, respectively, hammer two locating pins, until the dowel pin is installed in place, then lock rotor chamber fixing nut, the rotor chamber position and the original factory position. The original well-adjusted shims were installed on the drive shaft as it is. The rotor into the rotor chamber, with a copper rod or wood pad between the two rotors, locking rotor fixing nut. Note: ①The rotor, the rotor fixing nut and the transmission shaft are numbered before leaving the factory. When assembling, please put the same parts together, and you can see their respective numbers after this step is completed. ② According to the direction of rotation of the shaft to determine the fastening nut tightening direction, that fastening nut tightening direction and axis of rotation opposite. Rotor pump shaft coupling, along the rotor pump rotation mark a week to detect the rotor and rotor, rotor and rotor chamber cavity around the bottom and the bottom of the plane should be roughly the same gap, no rubbing phenomenon. Use a flat ruler on the outer plane of the rotor chamber in different positions to detect the gap between the rotor and the ruler and the gap measured in step 11 should be roughly the same, no rubbing phenomenon. Assemble the rotor chamber cover to the rotor chamber and ensure that the upper surface of the chamber cover is flush with the upper surface of the rotor chamber and lock each cover nut. Coupling hand pump rotor pump, pump rotor feel in the process of friction without rubbing phenomenon, such as no rub phenomenon indicates that the assembly has been completed. Install the coupling housing, turn on the power, start the rotor pump to ensure adequate liquid in the pipe, observe the mechanical seal for leakage, if there is no leakage, it means the mechanical seal has been replaced.
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