Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1991-09-03
1993-06-01
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418 88, 418 94, F04C 1804, F04C 2902
Patent
active
052154521
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to lubrication in a scroll compressor.
BACKGROUND ART
As prior-art examples of structures related to lubrication in a scroll compressor of the type in which the pressure on the discharge side acts on the electric motor, the lubricating oil sump, etc., reference will be made to Japanese Patent Publication No. 61-19803 (Lubricating Device in a Scroll Fluid Machine) and the specification of U.S. Pat. No. 4,552,518 (Scroll Machine). FIG. 1 shows the structure of the scroll compressor disclosed in Japanese Patent Publication No. 61-19803 mentioned above, which includes a closed container 101, which contains a compression mechanism 102, an electric-motor stator 103 fixed in position therebelow, and further below the same, a lubricating oil sump 104 for gathering lubricating oil. The compression mechanism 102 comprises: a stationary scroll wrap member 107 having a stationary scroll wrap 106 which is integrally formed on a stationary end plate 105; an orbiting scroll wrap member 110 having an orbiting scroll wrap 108 which is formed on an orbiting end plate 109 and which is engaged with the stationary scroll wrap 106 so as to define a plurality of compression chambers 111; a rotation restraining member 112 which prevents the orbiting scroll wrap member 110 from rotating so as to allow it to make an orbiting movement only; a crankshaft 115 having an eccentric drive shaft 114 which is adapted to cause an orbiting drive shaft 113 provided on the orbiting end plate 109 to make an eccentric orbiting movement; a bearing member 119 having a first and second main shaft bearing 117 and 118 which support a main shaft 116 of the crankshaft 115; etc. Further, a frame body plane 120 on the orbiting-end-plate side of the stationary end plate 105 and an orbiting-end-plate surface 121 on the stationary-end-plate side of the orbiting end plate 109 are so arranged as to slidably abut against each other, and, at the same time, an intermediate pressure hole 122 communicating with the compression chambers 111 is provided in the orbiting end plate 109 so as to keep the pressure in a back-pressure chamber 123 on that side of the orbiting end plate 109 which is opposite to the orbiting scroll wrap 108 at a pressure level which is intermediate between the discharge pressure and the intake pressure. Refrigerant gas, sucked into the compression mechanism 102 through an intake pipe 124 of the compressor, is compressed in the compression chambers 111, and then discharged through a discharge outlet 125. It then passes through a peripheral passage 126 around the compression chambers 111 and is discharged to the exterior of the compressor through a discharge pipe 127. The lubricating oil in the lubricating oil sump 104 is supplied by way of an eccentric oil feeding path 129 extending through the main shaft 116 of the crankshaft 105 and a first branch oil feeding path to the second main shaft bearing 118. That portion of the lubricating oil which flows through the oil feeding path 129 and a second branch oil feeding path 131 passes through an oil groove on the outside of the main shaft 116 and lubricates the first main shaft bearing 117 before it reaches the back-pressure chamber 123. The lubricating oil supplied to the bottom portion 133 of the orbiting drive bearing 113 after passing through the eccentric oil feeding path 129 undergoes pressure reduction in the gap between the eccentric drive shaft 114 and the orbiting drive bearing 113 and is discharged into the back-pressure chamber 123. The lubricating oil which is in the back-pressure chamber 123 passes through the intermediate pressure hole 122, etc. and flows through the compression chambers 111, where it is compressed and discharged out of the compression mechanism along with the refrigerant. That is, all of the lubricating oil which has lubricated the first main shaft bearing 117 and the orbiting drive bearing 113 ultimately enters the compression chambers 111. FIG. 2 is a sectional view showing the structure of the scroll compressor which is d
REFERENCES:
patent: 4552518 (1985-12-01), Utter
patent: 4898521 (1990-02-01), Sakurai et al.
patent: 5017108 (1991-05-01), Murayama et al.
Muramatsu Shigeru
Yamamoto Shuichi
Yamamura Michio
Matsushita Electric - Industrial Co., Ltd.
Vrablik John J.
LandOfFree
Compressor having an oil pump ring associated with the orbiting does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compressor having an oil pump ring associated with the orbiting , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compressor having an oil pump ring associated with the orbiting will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1810713