Vibration off-limit discrimination device and method for rotating equipment

A technology for rotating equipment and discrimination devices, which is applied to measuring devices, instruments, and measuring ultrasonic/sonic/infrasonic waves, etc. It can solve the problems of vibration monitoring sensitivity drop, influence of discrimination results, vibration monitoring false alarms, etc., to improve sensitivity and reliability Effect

Active Publication Date: 2016-05-25
NR ELECTRIC CO LTD +1
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Problems solved by technology

Therefore, if a fixed threshold is used, the threshold setting must be greatly increased, otherwise vibration monitoring is prone to false alarms, and a

Method used

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  • Vibration off-limit discrimination device and method for rotating equipment
  • Vibration off-limit discrimination device and method for rotating equipment
  • Vibration off-limit discrimination device and method for rotating equipment

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[0036] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention, but the examples cited are not intended to limit the present invention.

[0037] A device for judging the vibration limit of rotating equipment, such as figure 1 As shown, it includes a sampling module, a characteristic quantity calculation module, a working condition acquisition calculation module, an action threshold calculation module, and an alarm trip logic judgment module, where:

[0038] The sampling module is used to collect vibration signals of rotating equipment;

[0039] The characteristic quantity calculation module is used to calculate the characteristic quantity of the vibration signal according to the sampling result of the sampling module, generally including fundamental wave amplitude, harmonic amplitude, peak...

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Abstract

The invention discloses a vibration off-limit discrimination device and method for rotating equipment, and is characterized in that: the method comprises the following steps: step1, acquiring a vibration signal of the rotating equipment, and calculating a characteristic quantity of the vibration signal; step2, adopting a non-fixed action threshold value, selecting a vibration action threshold calculation algorithm of the rotating equipment according to a rotating equipment working condition quantity, and calculating an action threshold value; and a step3, judging if the characteristic quantity of the vibration signal of the rotating equipment is out of an upper limit range of the action threshold value, if out, judging that the vibration be out of limit. According to the invention, a suitable action threshold value is selected according to the characteristic quantity of the vibration signal of the rotating equipment, the out-of-limit vibration action curve of the rotating equipment is more suitable for the action characteristic of the equipment, the monitoring alarm sensitivity can be improved, and the risk of the monitoring alarm mistake is reduced.

Description

technical field [0001] The invention relates to a device and method for judging vibrations exceeding limits of rotating equipment. Background technique [0002] At present, the devices or methods for judging the vibration of rotating equipment that exceed the limit widely used in the field are all composed of fixed thresholds, and the fixed threshold is only suitable for the situation where the rotational speed and power of the rotating equipment are relatively stable. When the rotational speed of the rotating equipment fluctuates in a large range, For example, during the start-up process of the equipment, the rotating equipment has a resonance zone at a certain speed; or when the power of the rotating equipment fluctuates in a large range, the vibration of the rotating equipment will increase under certain power. Therefore, if a fixed threshold is used, the threshold setting must be greatly increased, otherwise vibration monitoring is prone to false alarms, and a large incr...

Claims

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Application Information

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IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 钟守平张琦雪陈俊王光陈佳胜郭自刚王凯李华忠季遥遥王洪林
Owner NR ELECTRIC CO LTD
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