The mechanical seal is made of loose material with capillary holes as gasket-

The mechanical seal is made of loose material with capillary holes as gasket

　2017-06-16　　

The mechanical seal is made of loose material with pores as gasket:

When a loose material with capillary pores is used as a gasket, it is easy to cause permeation and leakage. 43 Mechanical seal leakage is related to the physical properties of the medium. For example, using asbestos rubber sheet as the gasket, when the temperature and the stress on the gasket (the same 9.8MPa) are the same, the medium is air, and the internal pressure rises to 0.588MPa to cause leakage; the medium is water, and the internal pressure rises to 2.94 MPa, still no water droplets. To overcome leakage, fillers are often added to leak-prone materials to fill up the pores. However, when the pressure is released, the micropores in the gasket will expand; the effect of high temperature will cause the filler to age and fail, and the viscosity of the medium will decrease, and the connection will accelerate the leakage. Therefore, it is necessary to use non-permeable materials (such as metal) to make gaskets when sealing low-viscosity media under high temperature, high pressure and high pressure.　　464.html,

The laminated seal structure of the mechanical seal 　　 the interface leakage of the mechanical seal