| 摘要 |
A fuid-support apparatus supports a rotational sleeve (30) which rotates together with vanes, making use of the air-bearing effect of a bearing chamber (40) formed of a thin layer of air between the inner peripheral surface of a center housing (22) of a rotary compressor and the outer peripheral surface of the rotational sleeve (30). The apparatus is provided with inlet paths (45, 49) which enable the supply of external air to the air-bearing chamber (40), as required. Thick wall portions of the center housing (22) are provided with buffer chambers (47, 57) which open onto the inner peripheral surface of the center housing (22) through a large number of small holes (48, 58). Thus, if the rotation of the rotating sleeve (30) becomes eccentric so that it tries to come into contact with the center housing (22), the rotational sleeve (30) is pushed back by a buffer action of the air within the buffer chambers (47, 57), so that contact between the outer peripheral surface of the rotational sleeve (30) and the inner peripheral surface of the center housing (22) is prevented. |
