| 摘要 |
A radially inwardly extending annular flange (47) is integral with an annular portion of an outer shaft. The annular flange (47) forms an oil weir in operation. A radially outwardly extending annular sealing member (56) is mounted on an annular portion (45) of an inner shaft. The shafts are arranged to rotate relative to each other. The outer diameter of the sealing member (56) is greater than the inner diameter of the annular flange (47). In order to introduce or remove the sealing member (56) from the hydraulic seal, past the annular flange (47), the sealing member (56) is in the arm of a spiral ring to define axially overlapping portions (56A, 56B). The sealing member (56) is parted axially to form a clearance and a portion of the annular flange (47) is located in the clearance. The sealing member (56) is rotated about its axis when the slope of the spiral is parallel to the annular flange (47). <IMAGE> |
