Relative air intake flow variable device

Abstract

The invention discloses a relative air intake flow variable device and belongs to the technical field of mechanical design. The device comprises a control body, a centrifugal body, a centrifugal shaft, a centrifugal chamber, a centrifugal body, a centrifugal spring, an arc-shaped plate, an elastic cord, an air discharging pipe, a rotating plate and an arc-shaped spring, wherein the centrifugal chamber, the centrifugal body, the centrifugal spring, the arc-shaped plate and the elastic cord are all arranged inside the control body; one end of the centrifugal body is arranged inside the centrifugal chamber and is connected with the centrifugal shaft by the centrifugal spring; the other end of the centrifugal body is of an arc-shaped structure; the other end of the centrifugal body is in hermetical contact with the arc-shaped plate; the elastic cord is arranged on the outer surface of the arc-shaped plate. When the engine speed is relatively high, the rotating plate rotates anticlockwise, the air discharging pipe is blocked and the engine is normally supplied with air by an air compressor; when the engine speed is relatively low, the rotating plate rotates clockwise, a part of air flows from the front of the air compressor to the back of the air compressor, and the relative flow rate of the air compressor is relatively large, so no surging is generated. The device disclosed by the invention is reasonable in design, simple in structure and applicable to optimization design of a surge-preventing system of the air compressor.

Description

technical field [0001] The invention relates to a compressor surge regulating system in the technical field of mechanical design, in particular to a variable relative intake air flow device suitable for supercharged engines. Background technique [0002] Compressors are designed according to given intake conditions, speed, boost ratio and air flow, but their working conditions (temperature, pressure, speed and air flow of the working environment, etc.) actually change. The performance under various working conditions is called the compressor characteristic. At a certain speed, when the boost ratio of the compressor increases to a certain value, the compressor will enter an unstable working state, and surge is likely to occur, causing the entire system to generate low-frequency and large-amplitude airflow axial pulsations. There may even be a momentary backflow of airflow. Compressor surge can lead to blade breakage, structural damage, combustion chamber overheating and eng...

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Problems solved by technology

[0003] In the prior art, there is no technology to control compressor surge by using the principle of centrifugal force

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