How to ensure good fit performance of mechanical seal

The fit performance of the mechanical seal is the key to ensuring the use efficiency and quality of the accessories. Therefore, in the use of the equipment, it is very important to ensure the use requirements, achieve satisfactory use efficiency, and ensure the good fit performance of the equipment.

This seal is a device used to solve the sealing between the rotating shaft and the body. It is a device that prevents fluid leakage by the action of at least one pair of end faces perpendicular to the rotation axis, the elastic force (or magnetic force) of the compensation mechanism, and the cooperation of auxiliary seals to keep fit and slide relative to each other to prevent fluid leakage. Rotary fluid machinery such as compressors, reaction stirring tanks, etc., and also used for sealing of gearboxes, ship tail shafts, etc. Therefore, the seal is a universal shaft sealing device.

There are various seal structures, and the commonly used seal structure is end seal. The static ring and the moving ring of the end face seal form a pair of friction pairs, and the function of the friction pairs is to prevent the leakage of the medium. It requires the static ring and the moving ring to have good wear resistance. The moving ring can move flexibly in the axial direction, and automatically compensate for the wear of the sealing surface, so that it fits well with the static ring; the static ring has a floating property and acts as a buffer. .

For this reason, the sealing surface requires good processing quality to ensure good sealing performance. The basic components that constitute the mechanical seal are static ring, moving ring, gland, push ring, spring, positioning ring, shaft sleeve, moving ring sealing ring, static ring sealing ring, shaft sleeve sealing ring, etc.

Rubber is a commonly used sealing material. In addition to rubber, graphite, polytetrafluoroethylene and various sealants are suitable for sealing materials.

At present, the new technologies of various seals using new materials and processes are progressing rapidly, and there are the following new technologies for seals. Sealing surface grooved sealing technology In recent years, various flow grooves have been opened on the sealing end face of the seal to generate hydrostatic and dynamic pressure effects, and it is still being updated continuously.

Zero-Leak Sealing Technology It used to be that contact and non-contact seals could not achieve zero leakage (or no leakage). Israel uses slotted sealing technology to propose a new concept of zero-leakage non-contact mechanical face seal, which has been used in lubricating oil pumps in nuclear power plants. Dry-running gas sealing technology This type of seal uses slot sealing technology for gas sealing. The upstream pumping seal technology utilizes the open flow groove on the sealing surface to pump a small amount of leakage fluid from the downstream back to the upstream.

The above is an introduction to the operation of how to ensure the good fit of the mechanical seal. According to its introduction, the equipment can be better used and the efficiency can be exerted, so as to effectively meet its use requirements.