Vibration off-limit discrimination device and method for rotating equipment

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...

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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 large increase in the threshold setting will lead to a decrease in the sensitivity of vibration monitoring, which will also affect the judgment results

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