Device and method for online monitoring metal abrasive particles of oil in large-caliber oil return pipe

Abstract

The invention discloses a device and method for online monitoring metal abrasive particles of oil in a large-caliber oil return pipe.The device comprises a plurality of flow dividing guide pipes, a plurality of external-penetration-type eddy current detection probes, two porous end face transferring pipes, a fixing pipe and a multi-channel eddy current detector.The small-pipe-flow-dividing and multi-channel eddy current monitoring method is adopted; as the diameter of the flow dividing guide pipes is smaller than that of the large-caliber oil return pipe, the small-caliber external-penetration-type eddy current detection probes can be adopted for detection, detection accuracy and detection sensitivity are greatly improved, the detection missing probability is reduced, and the low-sensitivity problem of large-caliber external-penetration-type eddy current detection probes is effectively solved.As horn-shaped holes are formed in the porous end face transferring pipes unique in design, the drainage function is achieved, the resistance to flowing of oil is greatly reduced, and meanwhile oil dirt is not prone to accumulation.

Description

Technical field [0001] The invention relates to a non-destructive testing device and method, in particular to an online large-diameter oil return pipe oil metal abrasive particle monitoring device and method. Background technique [0002] General online oil monitoring, usually for aircraft engines, the diameter of the lubricating oil pipe is relatively small, and the oil flow rate is relatively high. The electromagnetic eddy current monitoring method can be used to monitor the metal abrasive particles in the oil, so as to indirectly monitor the aircraft engine. security status. For other large-scale equipment, such as wind power, shield machine and other equipment, the conventional electromagnetic eddy current monitoring method cannot be realized. The main reason is that the oil return pipe of the engine has a large diameter and the oil flow rate is relatively low. If a large-caliber external through-type eddy current detection probe is directly used, the detection sensitiv...

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Problems solved by technology

For other large-scale equipment, such as wind power, shield machine and other equipment, the conventional electromagnetic eddy current monitoring method cannot be realized. The main reason is that the oil return pipe of the engine has a large diameter and the oil flow rate is relatively low. If a large-caliber external through-type eddy current detection probe is directly used, the detection sensitivity is very low, and only larger metal abrasive particles can be detected, and the probability of missed detection is high, so it cannot be used for actual engineering monitoring work at present.

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