Mechanical seal device

The utility model provides a mechanical tighness system, includes pump shaft, gland, stationary ring, rotating ring, axle sleeve, the axle sleeve from the outer end to the inner in proper order is provided with actuating mechanism, locating plate, gland, stationary ring, rotating ring, rotating seat and spring holder, be provided with seal ring between said stationary ring terminal surface and the gland and prevent changeing the screw, be provided with a O shape circle a between stationary ring excircle and the gland, rotating ring and axle sleeve between is provided with O shape circle B, evenly be provided with the blind hole that a plurality of is the same on said spring holder and the rotating seat, be provided respectively in the blind hole of spring holder and rotating seat at the spring both ends, it connects the trundle of rotating seat also evenly to be provided with a plurality of on the spring holder. The utility model discloses it is rational in infrastructure, improved the sealing performance of pump, prolonged life, reduced use cost.