JPH0237287U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing a gas compressor according to the present invention, Fig. 2 is a plan view of the rear side block of the same gas compressor, Fig. 3 is a side sectional view of a conventional gas compressor, and Fig. 4 is a side sectional view of the gas compressor according to the present invention. FIG. 2 is a plan view showing a conventional rear side block. 1...Cylinder block, 2...Front side block, 3...Rear side block, 4...
Vane groove, 5... Vane, 6... Rotor, 8...
Lubricating oil, 9...Casing, 14, 15, 16...
...Oil distribution route, 19a, 19b, 20a, 20b
...Wire groove, 30...Communication hole, a...Gas compressor main body.

Claims (1)

[Scope of Claim for Utility Model Registration] A cylinder block with a substantially elliptical inner circumference provided between the front and rear side blocks;
It has a cylinder chamber formed by the cylinder block and both side blocks, and a plurality of vanes that are rotatably suspended horizontally within the cylinder chamber and that are movable in and out of a plurality of vane grooves provided in the radial direction. a rotor, a casing having a space at the rear of the rear side block for storing lubricating oil under discharge pressure and surrounding both sides and the cylinder block, and the vane on the rotor side of one or both of the side blocks. A plurality of wiper grooves are formed at positions facing the grooves, and the lubricating oil is supplied to the wiper grooves with reduced pressure through the rotating shaft of the rotor, and the vane grooves and the wiper grooves are connected to each other. When communicated, lubricating oil reduced in pressure in the wiper groove is supplied to the vane groove to obtain vane pressure.In the cylinder chamber b, vane grooves 5, 5, etc. are movable in and out of the vane groove 4 provided in the radial direction thereof. A rotor 6 is horizontally mounted rotatably, a space 7 is formed at the rear of the rear side block 3, and lubricating oil 8 is pressurized in this space 7 by the discharge pressure of the gas discharged from the discharge port of the cylinder chamber. It is constructed with a casing 9 with one end open for storing oil. The gas that enters the cylinder chamber b from the intake hole 11 of the front head 10 through the intake port 1a of the cylinder block 1 is compressed into high-pressure gas as the vanes 5 advance and retreat as the rotor 6 rotates, and the gas enters the cylinder chamber b through the intake port 1a of the cylinder block 1. 1b and the oil separator 12 into the space 7, and the discharge hole 1 of the casing 9.
3 is discharged to the outside. In the rotary vane type gas compressor as described above, the lubricating oil 8 in the space 7 is distributed to the rear and front side blocks 2, 3 and the cylinder 1 by the discharge pressure of the gas from the cylinder chamber b. In a gas compressor in which oil is supplied to the bearings of the rotor shaft 6a through formed oil distribution channels 14, 15 and 16 for lubrication, the tip of the vane passes through a discharge hole in one or both of the side blocks. Opening a communication hole that communicates with the space in a sealed section of the vane groove until the vane groove is located in the next cylinder chamber and until the vane groove leaves one wiper groove and approaches the next wiper groove, A gas compressor characterized in that the pressure within the vane groove in the sealed section is released to the space side.