Wet-type rotary vane electric vacuum pump for automobile

Abstract

The invention discloses a wet-type rotary vane electric vacuum pump for an automobile, which comprises a pump body assembly, wherein the pump body assembly comprises a rear end cover and a supporting seat which are fixedly connected; the supporting seat is fixedly connected with a cylinder body through a cover plate and a bottom plate; the inside of the cylinder body is eccentrically provided with a rotor; one end of a rotating shaft of the rotor is connected with the cover plate and the other end of the rotating shaft of the rotor runs through the bottom plate and the supporting seat sequentially for through connection; the supporting seat is provided with a pumping hole E; the top of the cylinder body is provided with an exhaust port F; the rotor is adjustably connected with two vanes; a spring device is arranged in the rotor, so that end parts of the vanes are always pressed against the inner wall of the cylinder body; an air cavity A, an air cavity B and an air cavity C are formed among the vanes, the rotor and the cylinder body; and the air cavity A corresponds to the pumping hole E, and the air cavity C corresponds to the exhaust port F. The wet-type rotary vane electric vacuum pump effectively meets the vacuum demands during the repeated braking of vehicles under the condition of idle speed, and the response speed is quick; and simultaneously, the vacuum pump is provided with a vacuum pump oil-way circulation, and vacuum pump oil is attached to the cylinder body, the rotor and vane surfaces uniformly with the vanes, so that operating noises are reduced effectively, and the operating reliability is improved.

Description

technical field [0001] The invention relates to an electric vacuum pump for automobiles. Background technique [0002] The rotary vane pump is mainly composed of stator, rotor, rotary vane, fixed cover, spring and other parts. Its structure is to use the rotor eccentrically installed in the stator cavity (the gap between the outer circle of the rotor and the inner surface of the stator is very small) and the sliding in the rotor slot is close to the inner wall of the stator by means of spring tension and centrifugal force When the rotor rotates, the two rotating vanes always slide along the inner wall of the stator. Usually, the gap between the rotary vane and the pump chamber is sealed with oil, so the rotary vane vacuum pump is generally an oil-sealed mechanical vacuum pump. In a traditional internal combustion engine model equipped with a vacuum servo system, the vacuum source comes from the vacuum pump driven by the engine crankshaft. . [0003] The State Intellectual...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a wet-type rotary vane electric vacuum pump for automobiles, which can effectively solve the problem that the existing vacuum pump has a limited vacuum pumping rate at idling speed. In some cases, the vacuum pump cannot meet the requirements, seriously affecting the braking effect of the vehicle and causing potential safety hazards

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