スクロール形流体機械

Abstract

PURPOSE:To reduce the deflection of a stationary scroll as well as to make it simple to form an oil feed passage to a fluid operating chamber by communicating the chamber with an oil sump within a casing with each other by the use of an oil passage furnished with a squeezing section, and concurrently communicating the bottom section of the chamber with the fluid operating chamber in an intermediate pressure range by the use of an oil feed path. CONSTITUTION:A chamber 7 at the back face of a stationary scroll 2 is communicated with a high pressure oil pump 97 within a hermetic casing 1 through an oil passage 6 furnished with a section squeezed by a main bearing 5. The chamber 7 is concurrently communicated with a fluid operating chamber 4 in an intermediate pressure range through an oil feed path 70. The inner pressure of the chamber 7 is maintained at the pressure which is decreased by a decrement equivalent to the passage squeezed by the main bearing 5 against high pressure, that is, at the intermediate pressure close to pressure within the operating chamber 4, oil is thereby introduced to the chamber 7 out of the oil sump 97, so that oil is therefore fed into the operating chamber 4 from the bottom section of the chamber 7 through the oil feed path 70. In this case, since pressure at the back face side of the scroll 2 falls in the intermediate pressure range, energizing force from the back face is prevented from being excessive, deformation due to the deflection of the scroll 2 can thereby be reduced.
(57)【要約】 【目的】固定スクロール2のたわみ変形を低減し、且つ 作動流体の加熱を抑制して性能を改善し、しかも流体作 動室4内への油注入のための通路構成を簡易化する。 【構成】可動スクロール3側に吐出穴34を開口し、固 定スクロール2の背面とボトム13との間にチャンバー 7を区画して、チャンバー7とモータ9の下部に設ける 高圧の油溜97との間を、途中部にクランク軸93の主 軸受5を利用した絞り部をもつ油通路6で連通し、且つ チャンバー7の底部と中間圧力領域にある流体作動室4 との間を油注入路70で連通し、チャンバー7内を中間 圧力として、固定スクロール2の背面からの付勢力を抑 制し、且つ圧縮ガスの加熱を抑制し、更にチャンバー7 の底部利用により油注入のための通路構成を簡易化し た。

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Cited By (4)

    Publication numberPublication dateAssigneeTitle
    EP-1087141-A3April 03, 2002Kabushiki Kaisha Toyota JidoshokkiSpiralverdichter
    US-6135738-AOctober 24, 2000Daikin Industries, Ltd.Scroll compressor having a discharge port in the moveable scroll
    US-6454551-B2September 24, 2002Kabushiki Kaisha Toyoda Jidoshokki SeisakushoSeal structure in a scroll type compressor
    WO-9749918-A1December 31, 1997Daikin Industries, Ltd.Scroll compressor