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Large-caliber lubricating oil path online metal particle monitoring device and detection method

A technology of metal particles and lubricating oil circuit, which is applied in measuring devices, particle and sedimentation analysis, particle size analysis, etc., to achieve the effect of high safety, simple operation method and simple driving circuit

Inactive Publication Date: 2019-05-10
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the existing online wear particle monitoring technology, most sensors based on the principle of inductance detection can only detect small-diameter lubricating oil passages, but in actual production activities, online detection of particle information in large-diameter lubricating oil passages is also required.

Method used

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  • Large-caliber lubricating oil path online metal particle monitoring device and detection method
  • Large-caliber lubricating oil path online metal particle monitoring device and detection method
  • Large-caliber lubricating oil path online metal particle monitoring device and detection method

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Embodiment 1

[0024] On the basis of the above, this embodiment introduces a method for monitoring and detecting metal particles in a large-diameter lubricating oil line, which specifically includes the following steps:

[0025] Guide the oil through a large-diameter oil pipe along the lubricating oil system of the mechanical equipment. The size of the large-diameter oil pipe used in this embodiment is 50mm in outer diameter×40mm in inner diameter×110mm in length, and the two magnetic poles of the sensor are attached to the outside of the large-diameter oil pipe. Together, the distance from the upper surface of the first magnetic pole and the second magnetic pole to the inner wall of the large-diameter oil pipe is 3mm;

[0026] Connect the excitation coil on the sensor to a DC power supply with a drive current of 0.6A, and use a DC signal to drive the excitation coil to generate a high-gradient static magnetic field along the axial direction of the large-diameter oil pipe between the first m...

Embodiment 2

[0031] On the basis of this implementation 1, in order to illustrate the distribution of the magnetic field generated by the sensor and the induced voltage generated in the detection coil when the abrasive particles flow through the sensor, the finite element analysis of the sensor was carried out by using Ansoft Maxwell, and the magnetic field distribution in the oil pipe was obtained situation, such as figure 2 and image 3 shown by image 3 It can be seen that the distribution of the magnetic field in the longitudinal direction of the tubing is uneven, showing a high gradient change, and the magnetic induction intensity is the largest at the air gap of the two magnetic poles, and the farther away from the air gap, the weaker the magnetic induction. Only when the abrasive particles enter the local area near the air gap, the magnetic flux of the detection coil will change, which helps to improve the abrasive particle resolution.

[0032] Assuming that a 1mm×1mm×1mm copper ...

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Abstract

The invention belongs to the field of mechanical equipment state monitoring, and particularly relates to a large-caliber lubricating oil path online metal particle monitoring device and detection method. The device comprises a sensor; the sensor comprises a first magnetic pole, a large-caliber oil pipe outer side plane groove, a detection coil, a second magnetic pole and an excitation coil; oil liquid is guided to pass through a large-caliber oil pipe along a lubricating oil path system of mechanical equipment; the two magnetic poles of the sensor are attached to the outer side of the large-caliber oil pipe; the excitation coil on the sensor is connected with a direct-current power supply; the detection coil is arranged on the outer surface of the large-caliber oil pipe; and the detectioncoil is connected with a voltage signal acquisition device. A direct current is used for driving the sensor to generate an axial high-gradient static magnetic field as an excitation source, and the sensor is good in anti-interference capability; and compared with a traditional inductance sensor which adopts high-frequency excitation, a driving circuit is simple, and the tiny parameter change of the excitation coil does not cause the considerable change of a sensor output, so that the manufacturing precision requirement on the sensor is not high.

Description

technical field [0001] The invention belongs to the field of state monitoring of mechanical equipment, and in particular relates to an online metal particle monitoring device and a detection method of a large-diameter lubricating oil circuit. Background technique [0002] On-line oil monitoring technology is an important method of mechanical equipment fault detection. In the process of wear and aging, mechanical equipment will produce tiny particles, which will exist in the lubricating oil circuit system of the equipment, which will cause considerable harm to mechanical equipment. Since most of these abrasive particles are ferromagnetic particles, which will carry a large amount of effective information on wear intensity and wear mode, by extracting information such as the concentration of abrasive particles, the properties, size and morphological characteristics of abrasive particles, it is possible to detect mechanical damage in real time. The operation status of the equi...

Claims

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Application Information

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IPC IPC(8): G01N15/00G01N15/02
Inventor 冯松王鑫宇萧红罗久飞李洪丞
Owner CHONGQING UNIV OF POSTS & TELECOMM
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