A screw compressor fault diagnosis method and system

A screw compressor and fault judgment technology, applied in the direction of machine/engine, etc., can solve the problems of the braking system supplying compressed air, the inability to ensure the effectiveness of the braking force of locomotives and vehicles, and the loss of wind blowing ability, so as to ensure safe operation. Effect

Active Publication Date: 2020-06-23
ZHUZHOU ELECTRIC LOCOMOTIVE CO LTD
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Problems solved by technology

[0004] However, in the prior art, when a fault such as a broken shaft occurs inside the screw compressor and the air blowing ability is lost, the pressure switch will still output a usable signal, which cannot be protected and prompted. At this time, the air source system cannot provide the braking system Compressed air cannot guarantee the effectiveness of the braking force of locomotives and vehicles, which will affect the safe operation of locomotives and vehicles

Method used

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  • A screw compressor fault diagnosis method and system
  • A screw compressor fault diagnosis method and system

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation.

[0025] The flow chart of the fault judgment method is attached figure 1 , the comparison chart of the pressure switch status under normal and fault status is shown in the attachment figure 2 .

[0026] Screw compressor failure judgment method of the present invention comprises the following steps:

[0027] Step A, monitor whether the screw compressor is shut down, and jump to step B if the screw compressor is shut down;

[0028] Step B: From the moment the screw compressor stops, after a set period of time, check whether the normally closed contact of the pressure switch is disconnected. If the normally closed contact of the pressure switch is not disconnected, it is judged that the screw compressor is faulty. When the screw compressor fails, the fault status is sent to the driver's cab for display.

[0029] In step A, determi...

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Abstract

The invention discloses a method and system for judging faults of screw compressors, wherein the method for judging faults comprises the following steps: step A, monitoring whether the screw compressor is stopped, and in the case of the stoppage of the screw compressor, jumping to step B; step B , From the time when the screw compressor is stopped, after a set period of time, check whether the normally closed contact of the pressure switch is disconnected. If the normally closed contact of the pressure switch is not disconnected, it is judged that the screw compressor is faulty. The invention utilizes the existing equipment, according to the working principle of the screw compressor, and can realize the timely identification of the fault state of the screw compressor by adding a logic judgment function in the control unit, which is simple and reliable, and ensures the operation safety of the locomotive and the vehicle.

Description

technical field [0001] The invention particularly relates to a screw compressor fault judgment method and system. Background technique [0002] The existing locomotive air source system uses a screw compressor. During the control process of the screw compressor, the air pressure in the screw compressor is generally monitored through an internal pressure switch. When the internal pressure exceeds a certain value, the pressure switch is disconnected. The switch outputs an unavailable signal to prevent the locomotive from starting the screw compressor to start the screw compressor with load and damage the screw compressor. [0003] At the same time, when the internal pressure of the screw compressor is lower than the set pressure, the pressure switch outputs an available signal of the screw compressor, allowing the screw compressor to start. [0004] However, in the prior art, when a fault such as a broken shaft occurs inside the screw compressor and the air blowing ability is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C28/28
CPCF04C28/28
Inventor 李锦辉方长征曾萍谢仕川郭莹莹黎丹
Owner ZHUZHOU ELECTRIC LOCOMOTIVE CO LTD
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