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The use requirements and installation of mechanical seals

by:Lepu Seal     2021-06-15
Requirements and installation of mechanical seal (1) Use of mechanical seal (1) Pay attention to the direction of rotation of the mechanical seal, whether the coupling is centered, whether the lubricating oil at the bearing part is added properly, and whether the piping is correct. (2) Before the mechanical seal is operated, first open the medium and cooling mechanical seal water valve to check whether the gas in the seal cavity is completely discharged to prevent leakage caused by the static mechanical shaft seal pressure, and then start the machine to run. (3) Whether the mechanical seal works normally and stably after driving, whether there is abnormal torque caused by the shaft rotation of the mechanical seal, as well as abnormal noise and overheating. (4) When the temperature of the medium conveyed by the mechanical seal is high, low, or contains impurity particles, is flammable, explosive, or toxic, corresponding measures such as sealing, washing, cooling, and filtering must be taken. (5) Before turning the mechanical seal, pay attention to whether the torque is too large, whether there is rubbing or abnormal sound. (2) The installation method of mechanical seal varies with the type of mechanical seal and the type of machine, but the essentials of mechanical seal installation are almost the same. The installation steps and precautions of mechanical seal are as follows: (1) Mechanical seal installation Before, the shaft (sleeve) and gland should be free of burrs, and the bearing should be in good condition; the seals, shaft, seal 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. Taking into account the compatibility of the rubber O-ring, if it is not suitable to use oil, it can be coated with soapy water. The floating static ring has no anti-rotation pin structure, so it is not suitable to be oiled, and should be dry installed into the gland. (2) First install the static ring of the mechanical seal and the gland on the shaft, taking care not to collide with the shaft, and then install the moving ring assembly. The set screws of the spring seat or transmission seat should be tightened evenly in several times. Before fixing the gland, push the compensation ring by hand for axial compression. After loosening the compensation ring, the compensation ring can automatically spring back without jamming, and then evenly lock the gland bolts. (3) Determine the size of the mechanical seal when installing the mechanical seal. When installing the mechanical seal, ensure the installation size of the mechanical seal according to the product's instruction manual or sample. Keywords: mechanical seals, mechanical seals, mechanical shaft seals
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