| 摘要 |
PURPOSE:To make abrasive power accumulated inside the said gap preventable from penetrating into the high pressure side, by installing an air-jet nozzle, to be opened to the low pressure side, in a transitional region ranging from the low pressure side to the high pressure side of a pressure gradient produced inside the gap between a center housing and a rotary sleeve. CONSTITUTION:A pressure gradient is produced inside a gap between a center housing 2 and rotary sleeve 4 of a vane-type compressore, but in the center housing if a transitional region ranging from the low pressure side to the high pressure side, there are provided with air-jet nozzles 20 and 21. These air-jet nozzles 20 and 21 are opened toward the low pressure side, while they are interconnected to the vicinity of a discharge port 34 via an interconnecting passage 25. Therefore, abrasive powder to be accumulated inside the said gap is no longer entered into a narrow gap at the high pressure side and, that is more, seizure or binding between the rotary sleeve and the center housing is preventable. |
