发明名称 |
Sealing device and sealing structure |
摘要 |
The sealing device includes: an outer peripheral ring 2000 that is in contact with a side wall surface of an annular groove 4100 at a low pressure side (L), and slides with respect to an inner peripheral surface of a shaft hole in a housing 5000 through which a shaft 4000 is inserted. An inner peripheral ring 3000 made of a rubber-like elastic body that is in contact with an inner peripheral surface of the outer peripheral ring 2000 and a groove bottom surface of the annular groove 4100, respectively. The outer peripheral ring 2000 is formed on its outer peripheral surface with a concave portion 2220 which extends from an end of a high pressure side (H) to a position which does not arrive at an end of a low pressure side, so as to introduce fluid thereinto from the high pressure side. |
申请公布号 |
US9157530(B2) |
申请公布日期 |
2015.10.13 |
申请号 |
US201314384501 |
申请日期 |
2013.03.11 |
申请人 |
NOK CORPORATION |
发明人 |
Seki Kazunari;Watanabe Koji;Tokunaga Wataru;Takao Yuki;Xu Fangman;Mizuta Hirotaka;Nakashima Keisuke;Igawa Takuya;Yoshida Yusuke;Watanabe Hideya;Kondo Yosuke |
分类号 |
F16J15/34;F16J15/16;F16J15/32;F16J15/44;F16J15/18 |
主分类号 |
F16J15/34 |
代理机构 |
Harness, Dickey & Pierce, P.L.C. |
代理人 |
Harness, Dickey & Pierce, P.L.C. |
主权项 |
1. A sealing device which is fitted into an annular groove formed in an outer periphery of a shaft so as to seal an annular gap between said shaft and a housing which rotate relative to each other, thereby to hold a fluid pressure in a region to be sealed which is constructed such that the fluid pressure therein changes, comprising:
an outer peripheral ring made of resin that is in intimate contact with a side wall surface of said annular groove at a low pressure side thereof, and slides with respect to an inner peripheral surface of a shaft hole in said housing through which said shaft is inserted; and an inner peripheral ring made of a rubber-like elastic body that is in intimate contact with an inner peripheral surface of said outer peripheral ring and a groove bottom surface of said annular groove, respectively, thereby to push said outer peripheral ring toward an outer peripheral surface side thereof; wherein said outer peripheral ring is formed on its outer peripheral surface with a concave portion which extends from an end of a high pressure side to a position which does not arrive at an end of a low pressure side, so as to introduce fluid thereinto from the high pressure side, in a state where said outer peripheral ring is fitted in a normal direction; and wherein said outer peripheral ring is formed with a fitting direction detection passage that forms a flow passage through which fluid to be sealed leaks from the high pressure side to the low pressure side, in a state where said outer peripheral ring is fitted in a reverse direction. |
地址 |
Tokyo JP |