Patent ID: 8210541

Claim:
A mechanical seal device for sealing sealed fluid which flows in a space between a shaft and an inner circumferential face of a casing body comprising: an attachment component made of a resin material having a mounting face to attach around said inner circumferential face at an outer face of said casing body, a fitting face, a ring shape groove face, and a shutoff face formed on an inner peripheral face which encloses said shaft in order in a direction from said mounting face towards an outboard direction, and a cooling fluid passage communicating with a cooling chamber in said ring shape groove face through which quenching fluid flows, a first seal ring made of rustless material having a moving face movably fitting in contact with said fitting face of said attachment component, a passage inner face to form a space between the passage inner face and said shaft, and a seal face provided at a tip end face biased elastically towards the outboard direction by a spring means arranged at a position where said sealed fluid does not contact, a second seal ring made of rustless material having a counter seal face slidably in contact with said seal face of said first seal ring, and a circumferential face section at an opposite side of said counter seal face to enclose said shaft, a seal collar hermetically fitted with said shaft and made of a resin material having a ring shape and a supporting circumferential face which supports and contacts said circumferential face section of said second seal ring, a fixing component fitted to the rotary shaft on an outboard side than the seal collar in an axial direction and made of a metal material having an inboard side end face in contact with an outboard side end face of the seal collar to support said seal collar, a fixing pin anchored to said fixing component for fixing said seal collar to said seal collar without pivotally moving, and a seal ring having a third seal face in contact with said shutoff face, sandwiched between said supporting circumferential face of said seal collar and said circumferential face section of said second seal ring so as to prevent said quenching fluid from flowing out of said cooling chamber.