| 摘要 |
1,236,582. Torsional vibration dampers. HOLSET ENG. CO. Ltd. 12 July, 1968 [15 Aug., 1967], No. 37356/67. Heading F2S. In a torsional vibration damper of the kind in which an inertia weight 14 rotates freely in an annular chamber containing viscous fluid, the chamber is composed of an integral casing member 10 with a single removable cover 16 sealed to the casing at 20 and 22. In a known damper of this form (Fig. 1, not shown), the seals are so located that the effective area of the cover (i.e. the area bounded by the seals) exceeds the area of the opposite chamber wall 30. The object of the invention is to make these areas equal, thereby eliminating unbalanced axial forces on the housing when the cover and the opposite wall are subjected to pressure in use of the damper. Figs. 2 and 3 show two ways of achieving this. |
