The principle of the double-end mechanical seal is basically the same as that of the single-end mechanical seal, which is formed by the end face (friction pair) perpendicular to the axis of rotation under the action of the fluid pressure and the elastic force of the compensation mechanism and the cooperation of the auxiliary seal. Device for fluid leakage. The double-end mechanical seal has two end-face seals. If the primary seal fails, the secondary seal can still seal to prevent leakage.Generally, double-end seals require an external sealing liquid system, and the sealing liquid is introduced into the sealing cavity for sealing, lubrication and cooling, and most of them are used for circulating cooling.The sealing fluid can not only flush the friction pair to improve the working environment of the mechanical seal, but also serve as an important detection method for the failure of the primary sealing surface.
