| 摘要 |
PURPOSE:To prevent a rotary sleeve from making contact with a side housing, by a method wherein, in the floating support construction of the rotary sleeve of a vane type rotary compressor, through-holes and gas collecting grooves are provided in the rotary sleeve. CONSTITUTION:A rotary sleeve 17 is rotatably and floatably supported in a center hosuing 1 through the medium of a neumatic bearing chamber 18. A rotor 2, with which vanes 16 insertably engage, is rotatably mounted inside the rotary sleeve 17. Further, through-holes 35, extending through both end surfaces of the rotary sleeve 17, and gas collecting grooves 36, consisting of recesses formed in both end surfaces and having an impasse-like groove edge, positioned facing the relative flow of gas produced occasioned by rotation of the rotary sleeve 17, are provided circumferentially at equal intervals in the rotary sleeve 17. This causes pressures at both ends of the rotary sleeve 17 to be balanced with each other with the aid of the through-holes 35 and prevents the occurrence of deviation of the sleeve in an axial direction, and a gas collecting groove 36 prevents the rotary sleeve 17 from making contact with side housings 6 and 7. |
