초록 ▼

A mechanical seal for providing fluid sealing between a housing and a rotatable shaft includes a first seal ring having a first seal face and a second seal ring having a second seal face. The first seal face further has a first portion and a second portion and the seal faces of the first and second

A mechanical seal for providing fluid sealing between a housing and a rotatable shaft includes a first seal ring having a first seal face and a second seal ring having a second seal face. The first seal face further has a first portion and a second portion and the seal faces of the first and second seal rings are opposed to each other when assembled. The first seal ring or the second seal ring is adapted to rotate with the rotatable shaft, and the other seal ring is restrained from rotating. The seal is a non-contacting seal that provides for the introduction of a barrier fluid between the seal faces. A first surface of the first seal ring and a first surface of the second seal ring are exposed to the process fluid. An opening force is developed between the first and second seal faces that inhibits contact between the seal faces. The seal further includes a system for regulating the opening force on the seal face as a function of the difference between the pressure of the fluid introduced between the seal faces, i.e., the barrier fluid, and the pressure of the process fluid.

대표청구항 ▼

[ Having described the invention, what is claimed as new and desired to be secured by letters patent is:] [1.] A mechanical face seal for providing fluid sealing between a housing and a rotatable shaft, the housing being exposed to a process fluid at a process fluid pressure, the seal comprisinga fi

[ Having described the invention, what is claimed as new and desired to be secured by letters patent is:] [1.] A mechanical face seal for providing fluid sealing between a housing and a rotatable shaft, the housing being exposed to a process fluid at a process fluid pressure, the seal comprisinga first seal ring having a first seal face extending between a first surface and a second surface,a second seal ring having a second seal face extending between a first surface and a second surface, said first and second seal faces being opposed to each other when assembled, said first surface of said first seal ring and said first surface of said second seal ring being exposed to a first fluid at a first pressure,one of said first seal ring and said second seal ring being adapted to rotate with the shaft, the other of said first and second seal rings being restrained from rotating,means for introducing a second fluid at a second pressure between the first and second seal faces, the difference between said first and second pressures developing an opening force between said first and said second seal faces, anda pressure regulating system coupled to said seal and adjusting the opening force as a function of the difference between the pressures of said first and said second fluids.