The demand of gear oil pump for mechanical seal

The working principle of mechanical seals Mechanical seals, also known as mechanical seals, are dynamic seals for rotating shafts in mechanical seal factories. Mechanical seals have reliable performance, small leakage, long service life, and low power consumption. It is suitable for the automation of the production process and high temperature, low temperature, high pressure, vacuum, high speed and various strong corrosive media. The demand for sealing under severe working conditions such as medium containing solid particles. The mechanical seal is made by one or several pairs of straight shafts. The relatively lubricated end face remains engaged under the effect of the fluid pressure of the seal factory and the elastic force* (or magnetic force) of the compensating tissue, and is equipped with an auxiliary seal to achieve a leak-proof shaft seal device. Gear oil pumps require mechanical seals, mechanical seals Compared with the soft packing seal as follows: Advantages: 1) The seal is reliable, the sealing condition is very stable during long-term work, and the leakage is small, and its leakage is about 1% of the soft packing seal: 2) Long service life, in oil, water It usually lasts for 1~2 years or longer in the medium. It usually works for more than half a year in the medium of mechanical seals for chemical pumps: 3) The consumption of rubbing power is small, and its conflict power is only 10%~50% of the soft packing seal 4) The shaft or bushing 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 frequent repairs: 6) The vibration resistance is good, and the vibration of the rotating shaft and the deviation of the shaft to the sealing cavity Inclined insensitivity: 7) Wide range of applications, mechanical seals can be used for high temperature, low temperature, high pressure, vacuum, different rotation frequencies, and sealing of various corrosive media and abrasive-containing media.

Disadvantages: 1) It is more complicated and requires high processing 2) The comparison between installation and replacement is laborious, requiring workers to have a certain technical level 3) When an accidental accident occurs, it is difficult to deal with. Preparatory work before sealing: 1) Check the mechanical seal Whether the standard meets the requirements of the design drawings, so whether 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 parts of the mechanical seal Whether the matching standard, roughness and parallelism meet the design requirements 3) When using the 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. The amount of swing and the degree of winding are Whether it meets the technical requirements, whether the sealing chamber meets the device standard, whether the sealing end cover and the shaft are straight, usually requires: the shaft movement is not greater than ±0.5mm: the shaft swing (at the rotary ring seal) is not greater than 0.06mm: the shaft The maximum winding degree is not more than 0.05mm: the non-straightness tolerance of the contact plane between the sealing end cover and the gasket facing the center line is 0.03~0.05mm5) should be kept clean, especially the sealing surface of the rotating ring and the static ring and the surface of the auxiliary sealing ring should be free from Impurities. Dust. It is not allowed to wipe the sealing surface without cleaning. 6) It is not allowed to hit the sealing element with things. To avoid damage to the seal