VANE TYPE COMPRESSOR

PROBLEM TO BE SOLVED: To enable a vane to be properly pushed against the inner face of a cylinder block while preventing the back flow of refrigerant gas and lubricating oil from a discharge chamber via a back pressure supply passage and respective back pressure chambers into a compression chamber a...

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Bibliographische Detailangaben
Hauptverfasser: HOTTA KAZUHIRO, SATO SHINICHI, MIYACHI TOMOYA, KOUMURA TETSUSHI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To enable a vane to be properly pushed against the inner face of a cylinder block while preventing the back flow of refrigerant gas and lubricating oil from a discharge chamber via a back pressure supply passage and respective back pressure chambers into a compression chamber after the stop of a rotating shaft.SOLUTION: Refrigerant gas and lubricating oil flowing from a discharge chamber 29 via an upstream path 41 and a rotation path 16h into a shaft side expansion chamber 51 with the rotation of a rotating shaft 16 flows via the rotation path 16h and a downstream path 42 into a plate side expansion chamber 52 when the shaft side expansion chamber 51 and the downstream path 42 are communicated with each other via the rotation path 16h. The refrigerant gas and the lubricating oil flowing into the plate side expansion chamber 52 is supplied via a plurality of pores 43 to respective back pressure chambers 20. Communication between the upstream path 41 and the shaft side expansion chamber 51 and communication between the shaft side expansion chamber 51 and the downstream path 42 are always made only by the rotation path 16h.SELECTED DRAWING: Figure 1 【課題】ベーンをシリンダブロックの内面に適切に押し付けることができるとともに、回転軸の停止後に、吐出室内の冷媒ガスや潤滑油が背圧供給通路及び各背圧室を介して圧縮室に逆流してしまうことを防止すること。【解決手段】回転軸16の回転に伴って、吐出室29から上流路41及び回転路16hを介して軸側拡張室51に流入した冷媒ガスや潤滑油は、回転路16hを介した軸側拡張室51と下流路42との連通が行われると、回転路16h及び下流路42を介してプレート側拡張室52に流入する。そして、プレート側拡張室52に流入した冷媒ガスや潤滑油は、複数の細孔43を介して各背圧室20に供給される。また、上流路41と軸側拡張室51との連通、及び軸側拡張室51と下流路42との連通は、常に回転路16hのみによってなされる。【選択図】図1