Double-excitation solenoid type particle sensitive detection device adopting full-band filtering

Abstract

The invention relates to a double-excitation solenoid type particle sensitive detection device adopting full-band filtering. The device is arranged on a hydraulic pipeline, and comprises a filter, a separation and absorption module, a rotary shaping module, an exciting coil I, an induction coil and an exciting coil II which are sequentially arranged on the hydraulic pipeline; the exciting coil I and the exciting coil II are in series-opposing connection; the induction coil is positioned in the center of a part between the exciting coil I and the exciting coil II; an electronic control unit (ECU) is respectively and electrically connected with and used for controlling the filter, the separation and absorption module, the rotary shaping module, the exciting coil I, the exciting coil II and the induction coil; a full-band filter is adopted as the filter; the separation and absorption module consists of a mechanical centrifugal module, a magnetization module, a magnetic absorption module, an electrification module and an electric absorption module which are sequentially connected. The double-excitation solenoid type online wear particle detection system adopts a non-contact measurement way, and has the advantages of being good in signal consistency, high in reliability, strong in detection signals, low in error, and the like.

Description

【Technical field】 [0001] The invention relates to a hydraulic oil wear particle detection device, in particular to a dual-excitation solenoid type particle sensitive detection device adopting full frequency band filtering, which belongs to the technical field of hydraulic equipment. 【Background technique】 [0002] Wear is one of the main factors for the failure of mechanical parts, and wear particles are the most direct information element for monitoring the wear process and diagnosing the type of wear failure. Statistics at home and abroad show that 70% of hydraulic machinery failures come from particle pollution of oil. Therefore, on-line monitoring of metal wear particles in oil has become one of the important ways to reduce wear and jamming failures of hydraulic systems. [0003] The inductive sensor is a non-contact measurement method. The material and quantity of metal wear particles contained in the oil change the equivalent inductance of the sensor, thereby realizin...

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Problems solved by technology

[0007] 3. Under normal circumstances, the particle size of metal wear particles is small, about 5um, and they are mainly ball abrasive particles, whose fineness is smaller than other abrasive particles, and the detection ability of the sensor coil is relatively weak

For example, Patent Document 1 can only deal with metal particles of about 10um, and cannot monitor the early wear of parts

[0008] 4. The magnetic induction intensity B in the solenoid is non-uniformly distributed along its axial direction, which will lead to serious measurement errors; at the same time, the detection ability of the same type of inductor for iron particles is greater than that for copper particles, which is also will cause measurement error

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