Rotary compressor
AssigneeNippon Piston Ring Co., Ltd.
InventorsHiroshi Sakamaki, Yukio Horikoshi
Life of this patent
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Abstract
A sliding-vane type oil free rotary compressor comprising a rotary sleeve rotatably mounted in a center housing, a rotor eccentrically contained in the rotary sleeve, and a plurality of vanes movably fitted in the rotor. The rotary sleeve and the center housing are arranged to define an annular pressure chamber between their inner and outer surfaces. A part of the compressed fluid is introduced to at least a high-pressure passage and then injected therefrom to the pressure chamber through a throttle to produce dynamic pressure for floatingly supporting the rotary sleeve.
Claims10
A rotary compressor comprising a center housing, two side housings, a rotary sleeve rotatably mounted in said center housing, a rotor eccentrically contained in said rotary sleeve, a plurality of vanes movably fitted in said rotor, a discharge chamber provided in said side housing, a pressure chamber defined by and between said rotary sleeve and said center housing and connected to said discharge chamber through at least a high-pressure passage, said high-pressure passage being disposed in the center housing and communicating with a passage extending to and along the side surface of said center housing, through said side housing and communicating with said discharge chamber, said high-pressure passage opening to said pressure chamber through at least one throttle means, whereby said rotary sleeve is floatingly supported by at least one of the static pressure of said pressure chamber and the dynamic pressure of fluid flowing through said throttle means from said high-pressure passage to said pressure chamber.
Dependencies are inferred from the claim text.