How the mechanical seal works! What are the technical requirements

How the mechanical seal works! What are the technical requirements? 　　Mechanical seals are shaft seals for rotating machinery. The drive shaft passes through the inside and outside of the equipment, so there is a circumferential gap between the shaft and the equipment. The medium in the equipment leaks out through the gap. If the pressure inside the equipment is lower than atmospheric pressure, air will leak into the equipment, so it must be stopped. The shaft seal is leaking, this time you need a mechanical seal to keep the fluid in place to prevent fluid leakage! 　　Mechanical seal parts are relatively accurate parts, usually consisting of a fixed ring, a rotating ring, a spring element, a spring seat, and a rotation aid Seal ring composition.　　First of all, it has sufficient strength and rigidity: 　　Under working conditions such as pressure, temperature and bone speed, it will not be damaged, the deformation should be as small as possible, and the sealing condition can be maintained when the working conditions fluctuate. In other words, the sealed end face of the housing must have sufficient strength and certain corrosion resistance to ensure that the product has a satisfactory service life.　　Second, it has good thermal shock ability: 　　 Therefore, the material is required to have high thermal conductivity and small linear expansion coefficient, and it will not break when subjected to thermal shock.　　Three, the smaller the friction coefficient: 　　The seal ring fittings should have a small friction coefficient　　four, good self-lubricating　　If a short period of friction occurs during the working process, the sealing end face will not be damaged. Therefore, the sealing ring should have good self-lubricating performance, and the material and sealing liquid of the sealing ring should have good full lubricating performance.　　5, mechanical seal, its structure is simple 　　The structure of the seal ring should be simple and symmetrical. It is preferable to use a monolithic structure or a combined (e.g., installed) sealing ring to avoid the use of a sealed end surface spray structure.　　 Sixth, the sealing ring should be easy to manufacture and manufacture 　　 The mechanical seal is easy to install and maintain, and the price is low.