Mechanical seal is the shaft seal of torsion machinery
2021-09-10 09:40
What is the working principle of the mechanical seal? What are the technical requirements?
The mechanical seal is the shaft seal of the torsion machine. The drive shaft passes through the inside and outside of the equipment, so there is a circumferential clearance between the shaft and the equipment. The medium in the device leaks out through the gap. If the pressure inside the device is below atmospheric pressure, air will leak into the device and must be stopped. The shaft seal leaks and this time you need a mechanical seal to keep the fluid in place to prevent fluid leakage.
The mechanical seal part is a relatively precise part, usually composed of a fixed ring, a torsion ring, a spring element spring seat and a torsion auxiliary seal ring.
1. First, it should have 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 are bumpy. That is to say, the sealing end face of the shell must have sufficient strength and certain corrosion resistance to ensure that the product has a satisfactory application life.
Second, it has good thermal shock ability:
Therefore, the mechanical seal requires the material to have high thermal conductivity and small linear expansion coefficient, and it will not crumble when subjected to thermal shock.
