Stepless adjustment device for air quantity of reciprocating compressor intake valve

Abstract

The invention discloses a stepless adjustment device for the air quantity of a reciprocating compressor intake valve. The stepless adjustment device is characterized that a rotating valve sheet arranged in a T shape with a transmission shaft is fixedly connected to the bottom end of the transmission shaft and is driven by the transmission shaft, and the rotating valve sheet is in coaxial fit withan upper seat and a bottom seat; an output shaft of a stepper motor is connected with the transmission shaft through a coupling; the rotating valve sheet is mutually spaced from a valve sheet sector hole through a valve sheet sector surface, and the upper seat and the bottom seat form a valve sheet sector passage by mutually aligning an upper seat sector hole and a bottom seat sector hole; when the valve sheet sector surface rotates to the position of the valve sheet sector passage, an air valve is closed; and when the valve sheet sector hole rotates to the position of the valve sheet sector passage, the air valve is opened. According to the stepless adjustment device disclosed by the invention, the stepless adjustment of the air quantity of a reciprocating compressor within the range of 0-100% can be realized.

Description

technical field [0001] The invention relates to a stepless adjustment device for gas volume of a reciprocating piston compressor. Background technique [0002] Reciprocating compressors are widely used in oil refining, chemical industry, national defense, metallurgy and other fields. In order to meet the needs of process changes, the compressor does not need to operate at full load in most cases, and the flow rate needs to be adjusted according to the process flow. The method of stepless adjustment of air volume with top-opening suction valve has attracted much attention because of its wide adjustment range, stepless adjustment within the range of 0-100%, and the ability to reduce energy waste. figure 1 It is a schematic cycle indicator diagram for the stepless adjustment of the air volume of the top-opening suction valve, P s is the suction pressure of the compressor, P d It is the exhaust pressure of the compressor. In the case of no stepless air volume adjustment system...

AI Technical Summary

Problems solved by technology

The technical scheme has a complex structure, many transmission parts, the solenoid valve is in a high-frequency working state, and the actuator continuously impacts the intake valve, which has high requirements for the reliability of the components.

Chinese patent CN1987098A discloses a top-opening intake valve device based on time control, which uses a stepping motor to drive a rotary hydraulic distributor, which plays the same role as the electromagnetic valve in the device disclosed in US patent document US5833209 to generate pressure pulses , the hydraulic piston drives the actuator to forcibly open the intake valve. The structure of the whole device is complex, requiring the use of a hydraulic station, and the actuator has frequent impacts on the air valve.

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