Flow control system with area-adjustable throat part

Abstract

A flow control system with area-adjustable throat part in the technical field of mechanical design comprises a compressor, a motor, a turbine, a connecting pipe, a valve holder, a valve body, a rotary shaft, a volume cavity, a rotary body and an elastic part; the rotary body is mounted in the volume cavity and is hermetically connected with the inner wall surface of the volume cavity; the right wall surface of a partition plate is connected with the rotary body by the elastic part; two ends of a first connecting pipe are respectively communicated with a turbine exhausting pipe and the gas inlet of a volume chamber; two ends of a third connecting pipe are respectively communicated with the gas inlet pipe of the motor and the volume cavity at the left side of the partition plate; when the gas inlet pipe of the motor has higher pressure, the rotary body drives the valve body to rotate clockwise, the exhausting recirculation rate of the motor is larger, and the blasting pressure of the motor is lower; when the gas inlet pipe of the motor has lower pressure, the rotary body drives the valve body to rotate counterclockwise, the motor is smaller in exhausting recirculation rate and lower in oil consumption. The flow control system with the area-adjustable throat part is reasonable in design, simpler in structure, and suitable for the exhausting recirculation systems of boosting motors.

Description

technical field [0001] The invention relates to an exhaust gas recirculation system in the technical field of mechanical design, in particular to a flow control system with throat area adjustment. Background technique [0002] Harmful emissions from engines are a major source of air pollution. With the increasing importance of environmental protection, the goal of reducing harmful emissions from engines has become an important direction for engine development in the world today. With the world's consumption of petroleum products increasing year by year, international oil prices remain high, and the economy of diesel vehicles is becoming more and more prominent, which makes diesel engines occupy an increasingly important position in vehicle power. Therefore, it is the primary task of diesel engine designers to carry out research on the control methods of harmful emissions from diesel engines. Exhaust gas recirculation system is to send a small part of the exhaust gas produce...

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Problems solved by technology

[0003] After searching the existing technical literature, it is found that Chinese patent number ZL200410063439.5, patent name: electronic exhaust gas recirculation gas control device, this patent technology provides a device for controlling the exhaust gas recirculation rate of the engine, which can better Taking into account the medium and high speed conditions of the engine; but the change of the exhaust gas recirculation rate is realized through a special control structure, which makes the control system more complicated

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