A honeycomb-shaped online electromagnetic detection sensor for oil-liquid metal wear particles

Abstract

The present invention discloses a honeycomb-shaped online electromagnetic detection sensor for metal abrasive particles in oil. Under the premise of not affecting the cross-sectional area of ​​oil flow, the existing oil sensor structure is improved, a multi-coil combination structure is adopted, and a small-diameter multi-probe method is used to improve the effect of improving the detection sensitivity. Furthermore, when the oil flow rate is too high, the longitudinal cross-sectional area of ​​the coil assembly and the oil guide tube assembly is increased, that is, the oil flow cross-sectional area is increased, so as to reduce the detection rate index requirement of the sensor, thereby meeting the needs of on-site detection. The present invention can effectively overcome the signal amplitude change caused by the eccentricity of metal abrasive particles passing through the coil, and the technical problem that the detection sensitivity is attenuated due to the large coil diameter, thereby affecting the judgment and analysis of the size of metal abrasive particles.

Description

Technical Field

[0001] The invention relates to an oil detection sensor, in particular to a honeycomb-shaped online oil metal wear particle electromagnetic detection sensor. Background Art

[0002] The principle of online oil metal abrasive particle detection is similar to the eddy current detection method for tubes, rods and wires. Since metal abrasive particles inevitably have eccentricity when passing through the coil, the signal amplitude changes, and the coil diameter is too large, the detection sensitivity is attenuated, thus affecting the judgment and analysis of the size of metal particles. Summary of the invention

[0003] The purpose of the present invention is to solve the problems mentioned in the above background technology part by means of a honeycomb-shaped online oil-liquid metal wear particle electromagnetic detection sensor.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a honeycomb-shaped online oil-metal abrasive particle electromagnetic detection sensor, characterized in that it includes a shell, connectors arranged at both ends of the shell, an oil guide pipe assembly arranged in the shell, a coil assembly and a circuit board, and a socket arranged on the top of the shell for connecting a signal source, characterized in that: the coil assembly includes a cylindrical coil structure mounting frame and a plurality of detection coil units arranged in a honeycomb shape inside the coil structure mounting frame; the oil guide pipe assembly includes an oil inlet channel and an oil outlet channel arranged on the left and right sides of the coil assembly; the longitudinal cross-sectional area of ​​the coil assembly is equal to the longitudinal cross-sectional area of ​​the oil guide pipe assembly; the oil inlet channel, the coil assembly, and the oil outlet channel are coaxially connected in sequence, and a sealing sleeve is provided at the connection between the oil inlet channel and the coil assembly, and at the connection between the oil outlet channel and the coil assembly.

[0005] Furthermore, when the oil flow rate is too high, the longitudinal cross-sectional area of ​​the coil assembly and the oil guide tube assembly is increased, that is, the oil flow cross-sectional area is increased, so as to reduce the detection rate index requirement of the sensor, thereby adapting to the on-site detection needs.

[0006] Beneficial effects of the present invention: Compared with the prior art, the advantages of the present invention are that the detection coil in the sensor is no longer designed to be sleeved on the outer periphery of the oil guide tube assembly (there will inevitably be problems of eccentricity and excessive coil diameter, which will affect the detection sensitivity), but the detection coil in the sensor is designed as a multi-coil combination structure without affecting the cross-sectional area of ​​the oil flow, and a small-diameter multi-probe method is used, specifically, multiple coils are arranged in a honeycomb shape, and the coil assembly is coaxially connected with the oil guide tube assembly, so that the oil flows through the entire coil assembly, which can greatly reduce the eccentricity of the metal abrasive particles in the oil when passing through the small-diameter coil, thereby achieving the effect of improving the detection sensitivity. Further, when the oil flow rate is too high, by increasing the longitudinal cross-sectional area of ​​the coil assembly and the oil guide tube assembly, that is, increasing the oil flow cross-sectional area, the detection rate index requirements of the sensor are reduced, thereby meeting the needs of on-site detection. The present invention can effectively overcome the signal amplitude change caused by the eccentricity of the metal abrasive particles passing through the coil, and the large coil diameter, which attenuates the detection sensitivity, thereby affecting the judgment and analysis of the size of the metal abrasive particles.

[0007] The present invention is further described in detail below in conjunction with the embodiments, but the honeycomb-shaped online oil-liquid metal wear particle electromagnetic detection sensor of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0009] Figure 1 Schematic diagram of a sensor structure according to an embodiment of the present invention.

[0010] Figure 2 A cross-sectional view showing the position of a coil assembly of a sensor according to an embodiment of the present invention.

[0011] Figure 3 It is a schematic diagram comparing the eccentricity of the same metal abrasive when passing through a detection coil unit sleeved on the outer periphery of an oil guide tube assembly and a detection coil unit of a honeycomb oil sensor according to an embodiment of the present invention.

[0012] In the figure, 1. shell, 2. connector, 3. oil guide tube assembly, 31. oil inlet channel, 32. oil outlet channel, 4. coil assembly, 41. coil structure mounting frame, 42. detection coil unit, 5 circuit board, 6 socket, 7 sealing sleeve, 8. metal abrasive, 91. detection coil unit of externally inserted type sleeve arranged on the periphery of the oil guide tube assembly, 92. detection coil unit of honeycomb oil sensor, A. degree of eccentricity of metal abrasive when passing through the detection coil unit of externally inserted type sleeve arranged on the periphery of the oil guide tube assembly, B. degree of eccentricity of metal abrasive when passing through the detection coil unit of the honeycomb oil sensor. DETAILED DESCRIPTION

[0013] Examples, such as Figure 1 , 2 As shown in Figure 3, a honeycomb-shaped online oil-metal abrasive particle electromagnetic detection sensor is characterized in that it includes a shell 1, connectors 2 arranged at both ends of the shell, an oil guide tube assembly 3 arranged in the shell 1, a coil assembly 4 and a circuit board 5, and a socket 6 arranged on the top of the shell 1 for connecting to a signal source, characterized in that: the coil assembly 4 includes a cylindrical coil structure mounting frame 41 and a plurality of detection coil units 42 arranged in a honeycomb shape inside the coil structure mounting frame 41; the oil guide tube assembly 3 includes an oil inlet channel 31 and an oil outlet channel 32 arranged on the left and right sides of the coil assembly 4; the longitudinal cross-sectional area of ​​the coil assembly 4 is equal to the longitudinal cross-sectional area of ​​the oil guide tube assembly 3; the oil inlet channel 31, the coil assembly 4, and the oil outlet channel 32 are coaxially connected in sequence, and a sealing sleeve 7 is provided at the connection between the oil inlet channel 31 and the coil assembly 4, and at the connection between the oil outlet channel 32 and the coil assembly 4.

[0014] Experimental verification shows that, under the premise of the same oil flow cross-sectional area, when the same metal abrasive 8 passes through the detection coil unit 91 which is externally mounted on the periphery of the oil guide tube assembly and the detection coil unit 92 of the honeycomb oil sensor, the eccentricity A of the metal abrasive when passing through the detection coil unit which is externally mounted on the periphery of the oil guide tube assembly is greatly reduced compared to the eccentricity B of the metal abrasive when passing through the detection coil unit which is externally mounted on the periphery of the oil guide tube assembly, thereby achieving the effect of improving the detection sensitivity.

[0015] Furthermore, when the oil flow rate is too high, the longitudinal cross-sectional area of ​​the coil assembly and the oil guide tube assembly is increased, that is, the oil flow cross-sectional area is increased, so as to reduce the detection rate index requirement of the sensor, thereby adapting to the on-site detection needs.

[0016] The above description is only a preferred embodiment of the present invention and does not limit the scope of the present invention. Without departing from the design spirit of the present invention, any modification, equivalent substitution and improvement made to the technical solution of the present invention by any technician in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A honeycomb-shaped online oil-liquid metal wear particle electromagnetic detection sensor, comprising a housing, connectors arranged at both ends of the housing, an oil guide tube assembly arranged in the housing, a coil assembly and a circuit board, and a socket arranged at the top of the housing for connecting a signal source, characterized in that: The coil assembly includes a cylindrical coil structure mounting frame and a plurality of detection coil units arranged in a honeycomb shape inside the coil structure mounting frame; the oil guide pipe assembly includes an oil inlet channel and an oil outlet channel arranged on the left and right sides of the coil assembly; the longitudinal cross-sectional area of ​​the coil assembly is equal to the longitudinal cross-sectional area of ​​the oil guide pipe assembly; the oil inlet channel, the coil assembly, and the oil outlet channel are coaxially connected in sequence, and a sealing sleeve is provided at the connection between the oil inlet channel and the coil assembly, and at the connection between the oil outlet channel and the coil assembly.

2. The honeycomb-shaped online oil-liquid metal wear particle electromagnetic detection sensor according to claim 1, characterized in that: Furthermore, when the oil flow rate is too high, the longitudinal cross-sectional area of ​​the coil assembly and the oil guide tube assembly is increased, that is, the oil flow cross-sectional area is increased, so as to reduce the detection rate index requirement of the sensor, thereby adapting to the on-site detection needs.

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