| 摘要 |
PURPOSE:To obviate the necessity for a side shoe and permit the high-speed operation of a vane pump by eliminating the sliding friction by using at least one of vane bearings as a ball-bearing and fixing the inner ring of the vane bearing in the axial direction relatively to a pivot shaft. CONSTITUTION:The movement of a vane 4 is restricted in the axial direction, as well as in the radial direction, by a ball bearing 5, and a vane side revolves, always keeping a minute interval to a housing 11, cover 2, and a rotor 1, and pumping operation is performed through the variation of the capacity of the operation is performed through the variation of the capacity of the operation space 13 surrounded by the vane 4, housing 11, cover 2, and the rotor 1. Further, since a pivot shaft 3 is thick on the fixed side, the rigidity is increased, so the high-speed revolution is permitted, preventing the top edge of the vane 4 from making contact with the housing 11. |
