JPS63154785U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the central part showing the vane chattering prevention mechanism in the vane compressor according to this invention, Figs. 2 and 3 are front views showing the front and rear side plates, respectively, and Fig. 4 is A cross-sectional view of a vane compressor, FIG. 5 is a graph showing the relationship between vane tip pressure and vane back pressure, FIG. 6 is a vertical cross-sectional view of the central part of a conventional vane compressor, and FIG. 7 is a cross-sectional view of the same. , FIG. 8 is a graph showing the relationship between vane tip pressure and vane back pressure, FIG. 9 is a vertical sectional view of the central part showing another conventional example, and FIG. 10 is a front view of the rear side plate of the above conventional example. . Cylinder...1, Front side plate...
2. Rear side plate...3. Rotor...11
, Working chamber...12, Vane...13, Vane groove...
...14, Back pressure passage...15, Compression chamber...16, Suction port...18, Discharge port...19, Discharge chamber...20
, communication hole...21, oil passage...26, back pressure groove...
27, 28, Intermediate pressure oil supply passage consisting of oil passage 26, annular passage 3b, slit of plain bearing 10, and shaft hole 3a... 29, High pressure oil consisting of oil passage 26, annular passage 3b, and oil passage 3d Supply passage...
30, High pressure gas supply passage...32, Check valve...3
3. Compression spring as biasing member...34, Confinement section of back pressure passage 15...D.

Claims (1)

[Claims for Utility Model Registration] 1. An elliptical cylindrical cylinder having an inlet and an outlet, front and rear side plates joined and fixed to both front and rear end surfaces of the cylinder, and a pair of working chambers within the cylinder. a rotor rotatably supported by a rotating shaft so as to form a rotor; a vane slidably inserted into a plurality of radial vane grooves formed in the rotor; and a vane configured to cover at least the rear side plate. a housing that is provided in the rear side plate and forms an oil separation chamber between the side surface of the rear side plate; a communication hole that is provided through the rear side plate and communicates the discharge chamber and the oil separation chamber; and a rotor of the rear side plate. a pair of back pressure grooves formed on the side sliding contact surface and communicating with the back pressure passage formed at the bottom of the vane groove from the beginning to the middle of the compression stroke; an intermediate pressure oil supply passage for reducing the pressure of oil in the oil separation chamber to an intermediate pressure and supplying the oil to the back pressure groove; Between the pressure grooves, that is, in the confinement section where the back pressure passage is in a closed state at the end of the compression stroke, oil corresponding to the discharge pressure that is opened so as to correspond to the sliding end surface on the rear side of the rotor is always kept in sliding contact with the rear side of the rotor. a high-pressure oil supply passage for supplying to the end face; a high-pressure gas supply passage for supplying refrigerant gas from the oil separation chamber to the back pressure groove; and a high-pressure gas supply passage housed in the high-pressure gas supply passage and not always attached. a check valve biased to an open position by a biasing member;
A vane chattering prevention mechanism in a vane compressor constructed by 2. The vane chattering prevention mechanism in a vane compressor according to claim 1, wherein the check valve is formed in a spherical shape, and the biasing member is a coiled compression spring.