| 摘要 |
PROBLEM TO BE SOLVED: To reduce the deformation of a lip under a high pressure and to improve durability by holding the inner periphery of a lip tip section with a support metal fixture, providing a reinforcing outer cover metal fixture on the outer periphery, and holding the lip tip section with both metal fixtures in a sandwich shape. SOLUTION: A rubber seal member 5 is constituted of a cylinder cover section 5a, an inner flange outer cover section 5b and a lip section 13, and the lip section 13 is constituted of a short cylinder section 13a parallel with a rotary shaft 32 and a lip tip section 13b shrunk in diameter toward a fluid storage chamber 33 side. A support metal fixture 12 is provided between a first seal element 7 and a seal member 5, the back face of the inner flange outer cover section 5b from the inner periphery of the lip tip section 13b through the inner periphery of the short cylinder section 13a is held by the ring-like support metal fixture 12, and a portion from the outer periphery of the lip tip section 13b to the outer periphery of the short cylinder section 5b is covered with a reinforcing outer cover metal fixture 21. The lip tip section 13b is held by the metal fixtures 12, 21 in a sandwich shape and is prevented from being directly applied with a high pressure, its deformation is reduced, and it can secure a high sealing property. |
