A screw compressor and its control device and control method

Abstract

The invention discloses a control device. The control device comprises a first detecting element, a second detecting element, a control element and a reversing valve; the first detecting element is used for detecting the pressure of a main air cylinder in real time, and transmitting a detected pressure signal to the control element; and the second detecting element is used for detecting the temperature of lubricating oil of the screw compressor in real time, and transmitting the detected temperature signal to the control element. The control device is used for feeding back the pressure feedback value detected by the first detecting element and the temperature detected by the second monitoring element to a working position of the control reversing valve, so as to connect or disconnect an air outlet pipe of the compressor with a main air cylinder, so that the working time of the screw compressor is prolonged, and the compressor can be prevented from being frequently started, the phenomenon that the emulsification is generated due to excessively low temperature of the lubricating oil can be avoided, and the service life and the working performance of the compressor can be prolonged and serviced. The invention also discloses a screw compressor comprising the control device, and a control method based on the control device.

Description

technical field [0001] The invention relates to the technical field of rail locomotive brake systems, in particular to a control device for screw compressors. The present invention also relates to a screw compressor including the above control device, and a control method based on the above control device. Background technique [0002] The braking system of rail locomotives is a key component to ensure the safety of rail transportation. The safety, reliability and stability of the braking system are particularly important. If there are hidden dangers in the braking system, it will pose a serious threat to the safety of the locomotive. The implementation of the rail locomotive braking system mainly depends on compressed air, and the compressed air required by the braking system is provided by the compressor. Therefore, the compressor is a crucial component of the rail locomotive braking system, and its quality directly affects the braking performance of the dynamic system. ...

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned screw compressor, there is a matching problem between the pressure value for controlling the start and stop of the screw compressor and the air volume of the screw compressor, resulting in the phenomenon that the working efficiency of the screw compressor is generally too low, and the running time of the compressor is relatively short , which leads to frequent start-up of the compressor, which affects the life of the compressor screw rotor and the drive motor, and causes the lubricating oil temperature to be too low, which is prone to lubricating oil emulsification

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