| 摘要 |
PROBLEM TO BE SOLVED: To prevent damage to a bearing end part especially in the case where a bearing is under the eccentric contact condition by always generating proper lubricating fluid film pressure in the whole area in a bearing surface. SOLUTION: This displacement fluid machinery includes a mechanism part 13 for compressing or transferring fluid or taking out dynamic energy from working fluid, a shaft 7 for driving the mechanism part 13 or taking out dynamic energy, bearings 3f, 4f for supporting the shaft 7, a lubricating fluid supply hole 7f for supplying a lubricating fluid to a bearing part formed by the shaft 7 and the bearings 3f, 4f, and a storage chamber for storing lubricating fluid. In this fluid machinery, lubricating fluid supply grooves 31, 32 communicating with the lubricating fluid supply hole 7f are provided axially in the bearing part, and the lubricating fluid supply grooves 31, 32 are formed to be gradually decreased in sectional area as they go toward the ends of the supply grooves 31, 32 where lubricating fluid flows.
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