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    • 9. 发明专利
    • SHAFT SEAL
    • JPS5884267A
    • 1983-05-20
    • JP18324281
    • 1981-11-16
    • TOKYO SHIBAURA ELECTRIC CO
    • MATSUDA TAKESHI
    • F16J15/40F16J15/26
    • PURPOSE:To uniformize the distribution of clearance in such a way that the outer diametral dimensions of segmented seal rings mating sealing action by means that they are retained by a spring around a shaft, and feed a pressurizing medium into the clearance to the shaft are made gradually smaller from the part near the turning direction to the parts away from it. CONSTITUTION:The structure is made up such that the outer diametral dimensions of segmented seal rings 11a-11d constituting a seal ring 11, can be gradually diminished along the turning direction 12. As the result, since force of a spring 3 to each segmented seal ring 11a-11d is gradually weakened along the turning direction 12 of a rotor, and it is in counterpoise with the pressure which is generated on the oil film in the clearance 8 between the seal ring 11 and a rotary shaft 1, eccentricity of the seal ring 11 is suppressed and distribution of the clearance 8 can be uniformly maintained.