SCROLL TYPE COMPRESSOR

• Main Authors: KUMA HIROFUMI, MURAKAMI KAZURO, WAKUI MASASHI
• Format: Patent
• Language: English; Japanese
• Published: 24.10.2019
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; WEAPONS

To provide a scroll type compressor capable of suppressing vibration of a rotating shaft in accompany with swing of a balancer, and reducing a load applied to a bearing for the rotating shaft.SOLUTION: A scroll type compressor includes a balancer 40 rotated integrally with a rotating shaft 14. A bush 36 includes a cylindrical portion 37 externally fitted to an inner peripheral face of a bearing for a scroll, and provided with an insertion hole 36a in an axial direction, and an auxiliary weight portion 43 disposed at a radial outer side with respect to the cylindrical portion 37. A position of the insertion hole 36a is determined on a position where moment Ma around an eccentric shaft 35 generated by centrifugal force Fa acting on a movable scroll 32 and moment Mb around the eccentric shaft 35 generated by centrifugal force Fb acting on the auxiliary weight portion 43 are directed in opposite directions. A center of gravity Z of the bush 36 is positioned at a side same as a center axis M of the eccentric shaft 35 with respect to a straight line T connecting a central axis N of the cylindrical portion 37 and a central axis L of the rotating shaft 14 when observed from the axial direction of the rotating shaft 14.SELECTED DRAWING: Figure 3 【課題】バランサのスイングに伴う回転軸の振動を抑制できるとともに、回転軸用軸受に加わる荷重を低減できるスクロール型圧縮機を提供すること。【解決手段】スクロール型圧縮機は、回転軸１４と一体回転するバランサ４０を備える。ブッシュ３６は、スクロール用軸受の内周面に外嵌され、かつ嵌挿孔３６ａが軸線方向に形成された円筒部３７と、円筒部３７より径方向外側に配置された副ウエイト部４３とを備える。嵌挿孔３６ａの位置は、可動スクロール３２に作用する遠心力Ｆａにより発生する偏心軸３５回りのモーメントＭａと、副ウエイト部４３に作用する遠心力Ｆｂにより発生する偏心軸３５回りのモーメントＭｂが、それぞれ逆方向となる位置に設けられる。回転軸１４の軸線方向から見て、ブッシュ３６の重心Ｚは、円筒部３７の中心軸線Ｎと回転軸１４の中心軸線Ｌを結んだ直線Ｔに対し、偏心軸３５の中心軸線Ｍと同じ側に位置する。【選択図】図３