Patent ID: 6811155
Filing Date: 2004-11-02
Classification: F16J

Abstract:
A shaft seal device for providing a process fluid between a housing and a rotary shaft, said shaft seal device comprising:a) a first seal portion being located inwardly relative to an apparatus and comprising a first stationary seal ring retained in said housing and a first rotary seal ring for making a sealing engagement relative to said first stationary seal ring; b) a first sleeve having a large diameter surface by which said first rotary seal ring is retained; c) a second sleeve having a large diameter surface and being located on the opposite side of said process fluid relative to said first sleeve; d) a second seal portion which comprises a second rotary seal ring retained in said large diameter surface of said second sleeve and a second stationary ring to form a sealing engagement relative to said second rotary seal ring; e) a fixed sleeve having an outer diameter surface and an inner diameter surface in which said outer diameter surface is fitted with said inner diameter surface of said first sleeve and said second sleeve and said inner diameter surface is fitted over said rotary shaft; and f) a connecting means being disposed, respectively, in said fixed sleeve and said second sleeve by which the two sleeves are joined relative to each other, wherein the first seal portion is arranged in a first seal installation chamber formed in the housing, the second seal portion is arranged in a second seal installation chamber formed in the housing, pressurized sealant fluid is introduced via the first installation chamber into a sealed fluid chamber disposed between the first seal portion and the second seal portion along the rotary shaft, and both of the first rotary seal ring and the second rotary seal ring are disposed in a manner for facing the sealed fluid chamber.