| 摘要 |
PROBLEM TO BE SOLVED: To improve the bearing cooling effect in a high-speed hydraulic machinery by providing a doughnut-like flow aligning plate between a bearing support member and a bearing oil reservoir, and providing the predetermined space between the flow aligning plate and the oil reservoir, and providing an air vent pipe in the bearing support member near the peripheral side thereof. SOLUTION: In a hydraulic machinery, a flange-like runner part 1a is provided in a rotary shaft 1, and a cylindrical bearing 2 for supporting the rotary shaft 1 is arranged in the periphery of the runner part 1a. The bearing 2 is housed in a bearing oil reservoir 20, and supported by a support member 21 provided in the oil reservoir 20. In this case, an air vent pipe 13, of which one end is opened under the support member 21 and of which the other end is opened over the oil surface of the lubricating oil, is provided in the support member 21 near the peripheral side thereof. A communicating pipe 8 for guiding the lubricating oil discharged from the bearing 2 to the oil reservoir bottom part 5 is provided at an intermediate part of the support member 21. A doughnut-like flow aligning plate 12 is provided between the support member 21 and the oil reservoir bottom part 5 so as to improve the bearing cooling performance. |
