| 摘要 |
PURPOSE:To improve load capacity and high-speed rotating stability by forming shallow grooves and circumferential grooves for force-feeding a lubricating fluid in one direction by rotating on either of cylindrical bearing surfaces and supplying a high-pressure fluid to the grooves through a fluid resistance. CONSTITUTION:A lot of spiral grooves 6a, 6b inclined to the center of a rotary shaft on both sides of the central position symmetrical about the central position of a cylindrical bearing surface 4 are formed on the cylindrical bearing surface 4 of the outer periphery of the rotary shaft 2. Circumferential grooves 7a, 7b are formed at positions suitably spaced from both ends of the cylindrical bearing surface 4 of the rotary shaft 2. Radial passages 8, 9 are formed at the central position of the cylindrical bearing surface 4 and at the positions of the circumferential grooves 7a, 7b. An axial passage 10 is formed at the shaft center position. A high-pressure supply passage 11 is formed by the radial passages 8, 9 and the acial passage 10.
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