Gear oil pumps demand for mechanical seals

Gear oil pumps demand for mechanical seals. The working principle of mechanical seals. Mechanical seals, also known as end seals (Mechanicalseal), are dynamic seals for rotating shafts in mechanical seal factories. The mechanical seals have reliable functions, small leakage, long service life, and low power consumption. There is no need for frequent repairs, and it can be adapted to the automation of the production process and high temperature, low temperature, high pressure, vacuum, high speed and various strong corrosive media. The medium containing solid particles and other harsh working conditions are sealed. Mechanical seals rely on a pair. Or several pairs of end faces that are relatively straight to the shaft and are kept in contact under the effect of the fluid pressure of the seal factory and the elastic force* (or magnetic force) of the compensation tissue, and are equipped with a leak-proof shaft sealing device that assists in the sealing. For the requirements of mechanical seals, the comparison between mechanical seals and soft packing seals is as follows: Advantages: 1) The seal is firm, the sealing condition is very stable during long-term work, and the leakage is small, and the leakage is about 1% of the soft packing seal: 2) Use Long life, usually up to 1 to 2 years or longer in oil and water media. It usually works for more than half a year in the mechanical seal medium for chemical pumps: 3) The rubbing power consumption is small, and the conflict power is only the soft packing seal 10%~50% 4) The shaft or sleeve is basically not worn: 5) The repair cycle is long. After the end face is worn, it can be actively compensated, and usually does not need to be repaired frequently: 6) Good vibration resistance, vibration to the rotating shaft And the shaft is not sensitive to the deflection of the sealed cavity: 7) It has a wide range of applications, and the mechanical seal can be used for high temperature, low temperature, high pressure, vacuum, different rotation frequencies, and sealing of various corrosive media and abrasive media. Disadvantages: 1) More complex, high processing requirements 2) Comparing installation and replacement, requiring workers to have a certain technical level 3) When accidents occur, it is difficult to deal with. Preparatory work before sealing: 1) Check the type of mechanical seal Whether the standard meets the needs of the planning drawings, so the parts (not only the sealing surface, auxiliary sealing ring) are damaged, deformed, cracks, etc. If there are defects, it is necessary to replace or repair 2) Check the coordination of the parts of the mechanical seal Standards, roughness, and parallelism are not suitable for planning requirements 3) When using a small spring mechanical seal, check whether the length and rigidity of the small spring are the same. 4) Check the amount of movement of the host. Whether the swing amount and the winding are suitable Technical requirements, whether the sealed cavity meets the device standards, whether the sealing end cover and the shaft are straight, usually require: the amount of shaft movement is not more than ±0.5mm: the amount of shaft swing (at the sealing ring of the rotating ring) is not more than 0.06mm: the maximum winding of the shaft The degree is not more than 0.05mm: the non-straightness tolerance of the sealing end cover and the gasket touching the center line is 0.03~0.05mm5) should be kept clean, except for the rotating ring and the stationary ring sealing surface and the auxiliary sealing ring surface should be free of impurities. Dust. It is not allowed to wipe the sealing surface without cleaning. 6) It is not allowed to knock the sealing element with something to avoid damage to the seal. Key words: seal factory, mechanical seal factory, pump mechanical seal