Selection and use of mechanical seals for kettles

Selection and use of mechanical seals for kettles 0.06MM. (2) The axial movement of the rotor does not exceed 0.3MM. (3) The runout tolerance of the positioning end of the sealing cavity combined with the sealing end cover facing the surface of the shaft (or shaft sleeve) should not exceed 0.04-0.06MM. 2. Confirmation of mechanical seal for pump (1) Confirm whether the installed seal is consistent with the required model. (2) Before installation, carefully check with the general assembly drawing to see if the number of parts is complete. (3) For the mechanical seal driven by the parallel coil spring, the spring can be divided into left and right rotation, which must be selected according to the rotation direction of the rotating shaft. 3. The installation method of the mechanical seal of the water pump varies with the type of mechanical seal and the type of the machine, but the installation essentials are almost the same. The installation steps and precautions are as follows: When installing, the product should be installed according to the instruction manual or sample. Mechanical seal installation dimensions. (2) Before loading, the shaft (sleeve) and gland should be free of burrs, and the bearing should be in good condition; the seals, shaft, sealing cavity and gland should be cleaned. In order to reduce frictional resistance, the part where the mechanical seal is installed on the shaft should be coated with a thin layer of oil for lubrication. Considering the compatibility of rubber O-rings, if oil is not suitable, soapy water can be applied. The structure of floating static ring without anti-rotation pin should not be oiled, and should be installed in the gland dry. (3) Install the static ring together with the gland on the shaft first, being careful not to collide with the shaft, and then install the moving ring assembly. The set screw of the spring seat or transmission seat should be evenly tightened several times. Before the gland is not fixed, push the compensation ring by hand for axial compression. After loosening, the compensation ring can automatically spring back without jamming, and then the gland bolts are evenly locked. 4. Use of mechanical seal of water pump (1) When the temperature of the conveying medium is too high, too low, or contains impurity particles, flammable, explosive or toxic, take corresponding measures such as blocking, flushing, cooling and filtering. (2) Turn the car by hand before running, pay attention to whether the torque is too large, whether there is friction and abnormal sound. (3) Pay attention to the direction of rotation, whether the coupling is centered, whether the addition of lubricating oil in the bearing part is appropriate, and whether the piping is correct.