engleski

Automation of Screw Compressor

In this paper, the development of a program instruction that controls the operation of a screw compressor will be presented. Screw compressors (helical lobe compressors) is the type of gas compressors that fall into the category of rotary positive displacement compressors. Screw compressors are increasingly used in industries due to their high efficiency, reliability, small dimensions, high capacity and quietness compared to the other types of compressors. Work of screw compressor is controlled by an algorithm that is executed on Programmable Logic Controllers (PLC). PLC is an industrial digital computer that controls machines and industrial processes. Information’s (pressure, temperature, flow, liquid level…) are taken from the environment by sensors. Sensor data are processed by PLC computer based on an algorithm. Output information from PLC is signal that controls actuators. An actuator is a device that produces a motion by converting energy. Actuators in screw compressors are electromotor, electromagnetic valves, pumps, switches… The PLC to be used to automate the operation of the compressor is Siemens Logo 8. The PLC program (program instruction) of the compressor is made with the Logo Soft Comfort software. For programming, the function block diagram (FBD) method was used. FBD is a graphical language for PLC.

Screw Compressors, PLC, Sensors, Actuators, Function Block Diagram

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