JPS6421288U - - Google Patents

Description

[Brief explanation of the drawing]

1 to 5 show an embodiment embodying this invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a sectional view taken along the line A--A in FIG. 1, and FIG. B-B in the diagram
4 is a sectional view taken along line CC in FIG. 1, FIG. 5 is a partial sectional view showing the vicinity of the on-off valve mechanism, and FIG. 6 is a partially cutaway side view of the conventional device. Front housing 1, rear housing 2, suction chamber 1a, cylinder 3, discharge chambers 3a, 3b, front side plate 4, rotor 6, vane 8, suction ports 12, 13, discharge ports 14, 15, capacity control plate 21, spool A chamber 24, a spool 25, a drive pin 26 as a connecting member, a long hole 27, a check valve 32 forming an opening/closing valve mechanism, a piston 33, a pressing spring 34, a seal groove 3 forming a seal portion.
5a, the same seal ring 36, the intermediate passage 37 as a supply route, the same connection passage 38, the same supply passages 39, 40, the oil supply passages 41, 42, 43,
Lubricating oil O, first pressure chamber S1, second pressure chamber S2.

Claims (1)

[Claims for Utility Model Registration] 1. A rotor having a plurality of vanes is rotatably accommodated and supported between a pair of side plates bonded and fixed to both ends of a cylinder in a housing, so that the inner circumferential surface of the cylinder and the outer circumferential surface of the rotor are connected. The space between them is divided into a plurality of compression chambers by the vanes, and the compression chambers expand or contract as the rotor rotates, and alternately communicate with the suction port and the discharge port to suck, compress, and discharge refrigerant gas, and a variable capacity vane compressor in which a capacity control plate for controlling a maximum volume when the compression chamber is closed is rotatably interposed between the one side plate and the rotor, the capacity control plate of the one side plate; a spool chamber provided at a predetermined position corresponding to the spool chamber; a first pressure chamber that is reciprocatably accommodated in the spool chamber and into which refrigerant gas corresponding to the discharge pressure is introduced; and a first pressure chamber into which refrigerant gas corresponding to the discharge pressure is introduced. Second introduced
a spool that is partitioned into a pressure chamber and movably connected to the capacity control plate via a connecting member; and an on-off valve mechanism that controls when to introduce oil corresponding to the discharge pressure into the second pressure chamber. , an annular seal provided between the capacity control plate and the side plate to separate and cut off both high and low pressure regions, and to which oil equivalent to the discharge pressure is always supplied; and an annular seal provided in the cylinder to control the capacity. A variable capacity vane compressor comprising an oil supply section that supplies high pressure oil to apply pressure to the plate in a direction in which the capacity control plate moves away from the cylinder. 2. A utility model registration in which the oil to the oil supply passage and the annular seal portion are supplied from the same source, and the oil supply passage is provided in a plurality of spots at a position where the outlet portion faces the capacity control plate. A variable displacement vane compressor according to claim 1.