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1. 发明专利

JPH0755016A MECHANICAL FACE SEAL 失效
公开(公告)号：JPH0755016A
公开(公告)日：1995-03-03
申请号：JP14589994
申请日：1994-06-28
申请人： CRANE JOHN INC
发明人： GUREN JII PEKUTO , JIYON HAMAKAA , PIITAA ERU KEI
IPC分类号： F16J15/34
摘要： PURPOSE: To suppress leakage of sealing fluid by providing a dam part extending inwardly from a circumference of one seal face, and an annular groove part formed between first and second circumferential edges. CONSTITUTION: When a ring having entrance lands 58 is rotated, circumferential edges 60, 62 act as a skimmer on the fluid on the high pressure side of a seal in response to the rotation direction of a shaft to drive or dip out the fluid inwardly within the seal face. When the fluid enters between the seal faces 40, an angle is formed by either of side edges 52, 54 of a land 46 in response to the rotation direction of the shaft. As a result, since the traveling direction of the land 46 is generated, the fluid is continued to be dipped out diametrically inwardly from the circumferential area of the respective following lands 46, and finally the fluid collides with a dam part 42, and a striking pressure zone is then maintained in the neighborhood of the dam part 42 adjacent to a groove part 44. Thus, leakage of the sealing fluid can be suppressed.

2. 发明专利

JPH06101765A SECONDARY SEAL 失效
公开(公告)号：JPH06101765A
公开(公告)日：1994-04-12
申请号：JP9905693
申请日：1993-04-26
申请人： CRANE JOHN INC
发明人： GUREN JII PETSUTO , PIITAA ERU KEI
IPC分类号： F16J15/24 , F01D11/00 , F16J15/00 , F16J15/34
摘要： PURPOSE: To provide a high-temp. resisting secondary seal made of non- elastomer material for use in a gas turbine by installing a high-temp. carbon graphite secondary seal ring of split type which is to be biased in the axial direction by a first biasing means and in the radial direction by a second biasing means. CONSTITUTION: A holding device is formed from a primary ring 30, holder 40, secondary seal rings 60 and 70, and a biasing means consisting of a disc 54 and spring 52, and the secondary seal rings 60 and 70 and the primary ring 30 are biased by the spring 52 via the disc 54 in the axial direction and the seal face 32 of the primary ring 30 is biased toward the surface 12 of a fit ring 10. The holder 40 has a contour portion 42 on that side of the holding device facing the periphery of the primary ring 30, and circular springs 62 and 82 are installed in the connection part 46 of the holder, so that the secondary seal rings 60 and 70 are biased in the radial direction. The whole surfaces of the secondary seal rings 60 and 70 are coated with a dry lubricant.

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