JPS61114092U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a sectional view of essential parts of a vane compressor showing an embodiment of this invention, Fig. 2 is a side sectional view of the rear side plate portion, Fig. 3 is a side sectional view of the front side plate portion, and Fig. 4
The figure is an enlarged partial sectional view showing the lubricating oil communication path from the small hole in the rear side plate to the bottom of the vane groove.
The figure is a graph showing vane back pressure and vane tip pressure with respect to the rotation angle of the vane, Figure 6 is a partial side sectional view showing another embodiment of the back pressure groove, and Figure 7 is a conventional small hole to vane groove groove. FIG. 3 is a partial cross-sectional view showing the configuration of a lubricating oil communication path leading to the bottom. 1... Cylinder, 2... Front side plate, 3... Rear side plate, 4... Rotor shaft, 6... Rotor, 7... Vane groove,
7a...groove bottom, 8...vane, 10...front casing, 11...rear casing, 17...discharge port,
21... Oil reservoir chamber, 22... Lubricating oil, 24... High pressure oil communication passage, 25... Medium pressure oil communication passage, 26, 27... Back pressure groove, 28... Small hole, 29... Gap.

Amendment February 15, 1980 The scope of claims for utility model registration is amended as follows.

[Claim for Utility Model Registration] An elliptical cylinder, front and rear side plates attached to both end faces of the cylinder so as to form a sealed cylinder chamber within the cylinder, and both side plates of the cylinder. The rotor shaft is rotatably housed in the cylinder chamber with the rotor shaft supported, and multiple bases are installed.
a rotor having a vane groove; and a rotor that can be retracted and retracted into each vane groove of the rotor so that the tip is in sliding contact with the inner circumferential surface of the cylinder and the both ends are in sliding contact with the inner surfaces of the front side plate and the rear side plate , respectively. and a casing forming an oil reservoir chamber for storing lubricating oil under discharge pressure at the rear of the rear side plate , and a part of the lubricating oil in the oil reservoir chamber is stored in the vane. In a vane compressor that applies pressure to the bottom of the groove to apply back pressure to the vane to ensure contact pressure of the vane against the inner circumferential surface of the cylinder, a pair of back pressure grooves are provided on the inner surfaces of the side plates. a high-pressure oil communication passage formed at a position corresponding to the rotation locus of the bottom of the vane groove and at a symmetrical position with respect to the rotor axis, corresponding to the volume distribution on the long axis side of the cylinder chamber, and communicating with the oil reservoir chamber; A small hole having a throttling action is branched from the vane groove, and its opening end is also located at a portion of the inner surface of the side plate that partitions the pair of back pressure grooves, and at a position away from the rotation locus of the groove bottom of the vane groove. A vane compressor featuring:

Claims (1)

[Claim for Utility Model Registration] An elliptical cylinder, front and rear side plates attached to both end faces of the cylinder so as to form a sealed cylinder chamber within the cylinder, and both side plates of the cylinder. A rotor is rotatably housed in a cylinder chamber with a rotor shaft supported and has a plurality of base grooves; a plurality of vanes retractably housed in each base groove of the rotor so as to be in sliding contact with each other; and a casing forming an oil reservoir chamber for storing lubricating oil under discharge pressure at the rear of the rear side plate. A base compressor which is configured to force-feed a portion of the lubricating oil in the oil reservoir to the bottom of the vane groove to apply back pressure to the vane and to ensure contact pressure of the vane against the inner circumferential surface of the cylinder. A pair of back pressure grooves are formed on the inner surfaces of the side plates at positions corresponding to the rotation locus of the bottom of the vane grooves, and at positions symmetrical about the rotor axis, corresponding to the volume distribution on the longitudinal axis side of the cylinder chamber. A small hole with a throttling effect is formed from the high-pressure oil communication passage that communicates with the oil reservoir chamber, and the opening end thereof is also located in the portion that partitions the pair of back pressure grooves on the inner surface of the side plate, and is located in the vane groove. A vane compressor characterized in that the vane compressor is located at a position away from the rotation locus at the bottom of the groove.