Oil abrasive particle sensor integrated with filtering function

Abstract

The invention relates to an oil abrasive particle sensor integrated with a filtering function, which comprises a sensor assembly, the sensor assembly comprises a sensor shell, a coil framework mounted in the sensor shell, a coil wound on the coil framework and an oil liquid through hole which is formed in the sensor shell and extends to penetrate through the coil framework; the filter assembly comprises a machine filter shell installed on one end face of the sensor shell and a filter element unit installed in the machine filter shell, the machine filter shell is provided with a containing cavity, and a liquid inlet and a liquid outlet which are communicated with the containing cavity are formed in the machine filter shell; a one-way valve assembly; a bypass valve assembly. By arranging the filter assembly on one side of the sensor assembly, a filtering and monitoring integrated framework is achieved, oil way inflection points are reduced, pressure loss and signal interference caused by redundant flow channels are avoided, and the real-time performance and detection precision of abrasive particle recognition are improved.

Description

Technical Field

[0001] This invention belongs to the field of sensor technology and relates to an oil abrasive sensor, specifically an oil abrasive sensor with integrated filtration function. Background Technology

[0002] As industrial equipment evolves towards higher precision and reliability, lubricating oil condition monitoring plays an increasingly crucial role in equipment health management. Oil abrasive sensors, as a key component, can detect the metal particle content in lubricating oil in real time, forming the core foundation for predictive maintenance and fault early warning. However, most oil abrasive sensors on the market only have detection functions. When faced with high concentrations of contaminated oil or particulate impurities, they are prone to response distortion or even sensor clogging, limiting their real-time performance and system stability.

[0003] Chinese invention patent application number 202410697416.7 discloses a multi-layer lubricating oil filter element structure, including a base and a housing, the housing being fixed to one side of the base, and a filter assembly disposed on the housing for filtering lubricating oil; it also includes a replacement assembly disposed on one side of the housing for replacing the filter element of the filter assembly; the housing has an inlet and an outlet on its outer side. This application achieves graded filtration of particulate matter in lubricating oil through a multi-layer composite filter element structure, achieving a certain balance between improving filtration efficiency and ease of replacement. However, this structure focuses on the design of the filter element itself, lacks a linkage mechanism with monitoring sensors, and does not consider bypass control under high pressure differential conditions, making it difficult to meet the requirements of overall coordinated operation of the system under complex working conditions. Summary of the Invention

[0004] This invention provides an oil abrasive sensor with integrated filtration function. By integrating a filter element assembly and a bypass control unit into the sensor structure, the monitoring and filtration functions are deeply integrated.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: an oil abrasive sensor with integrated filtration function, comprising: A sensor assembly, the sensor assembly including a sensor housing, a coil frame installed inside the sensor housing, a coil wound on the coil frame, and an oil passage opening opened inside the sensor housing and extending through the coil frame; A filter assembly, comprising an oil filter housing mounted on one end face of the sensor housing and a filter element unit mounted inside the oil filter housing, wherein the oil filter housing has a receiving cavity and has an inlet and an outlet communicating with the receiving cavity; A one-way valve assembly; the one-way valve assembly includes a one-way valve body mounted between the sensor housing and the filter housing, and a one-way valve core adjustablely mounted on the one-way valve body; A bypass valve assembly, the bypass valve assembly including a bypass valve body installed in the receiving cavity and cooperating with the filter element unit, and a bypass valve core adjustablely installed on the bypass valve body.

[0006] Ideally, the sensor assembly also includes an electromagnetic shield covering the periphery of the coil frame.

[0007] Optimally, the filter element unit includes an inner support column tube, a filter screen formed on the outer surface of the inner support column tube, a pleated filter paper disposed on the outer ring of the filter screen, and an outer support column tube disposed on the outer ring of the pleated filter paper.

[0008] Optimally, the one-way valve assembly further includes a one-way valve cover disposed within the receiving cavity and cooperating with the one-way valve body. The one-way valve cover has a one-way valve through hole and a first receiving hole coaxial with the one-way valve through hole at its center. The one-way valve assembly also includes a one-way valve compression spring connected to the one-way valve core and disposed within the first receiving hole. The one-way valve through hole corresponds to the oil through hole.

[0009] Ideally, the filter element unit is installed between the one-way valve cover and the bypass valve body.

[0010] Optimally, the bypass valve assembly further includes a first groove formed on the bypass valve core, a second groove formed on the inner wall of the filter housing, and a bypass valve compression spring disposed in the first groove and the second groove, wherein a flow gap is formed between the circumferential surface of the bypass valve body and the inner wall of the filter housing.

[0011] Optimally, the filter assembly further includes an outlet filter screen mounted on the filter housing and cooperating with the outlet port, and an outlet filter screen cap mounted on the filter housing and covering the outlet filter screen.

[0012] Furthermore, the inner support column tube and the outer support column tube of the filter element are independently provided with filter pores with a diameter of 100~800μm, the filter screen is a filter screen with a diameter of 50~200μm, and the pleated filter paper is a filter paper with a diameter of 10~50μm.

[0013] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: This invention integrates a filter-equipped oil abrasive sensor. By setting a filter assembly on one side of the sensor assembly, it achieves an integrated architecture of filtration and monitoring, reducing oil circuit inflection points, avoiding pressure loss and signal interference caused by redundant flow channels, and improving the real-time performance and detection accuracy of abrasive identification. Furthermore, it prevents oil backflow and contamination of the detection chamber through a one-way valve, and the bypass valve automatically opens under high pressure differential, ensuring continuous oil supply under blockage conditions and monitoring response capability under abnormal conditions.

[0014] The filter element unit of this invention adopts a graded design of filter screen and filter paper, combined with the outlet filter screen to form a gradient filtration path, which enhances the oil impurity interception capacity and extends the service life of the lubrication system. The overall structural scheme adopts an axial linear layout, with modular connection of each functional component. The overall structure is compact and reasonable, which facilitates the installation of sensors and pipelines and subsequent disassembly and maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the oil abrasive sensor with integrated filtration function of the present invention; Figure 2 This is a cross-sectional view of the oil abrasive sensor with integrated filtration function of the present invention. Figure 3 This is a side view of the oil abrasive sensor with integrated filtration function of the present invention. Figure 4 This is a schematic diagram of the filter circuit in normal operation of the oil abrasive sensor with integrated filtration function of the present invention. Figure 5 This is a schematic diagram showing the bypass valve opening during overload operation of the oil abrasive sensor with integrated filtration function of the present invention. Figure 6 This is a perspective view of the filter element unit in the oil abrasive sensor with integrated filtration function of the present invention; Figure 7 This is a cross-sectional view of the filter element unit in the oil abrasive sensor with integrated filtration function of the present invention. Detailed Implementation

[0016] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0017] like Figure 1 and Figure 2 The oil abrasive sensor with integrated filtration function shown mainly includes a sensor assembly 100, a one-way valve assembly 200, a filter assembly 300, and a bypass valve assembly 400.

[0018] The sensor assembly 100 includes a sensor housing 110, a coil frame 120 installed inside the sensor housing 110 (e.g., a receiving groove matching the coil frame 120 can be formed on the sensor housing 110, and the coil frame 120 can be placed in the receiving groove and sealed), a coil 140 wound on the coil frame 120, and an oil passage 100 formed inside the sensor housing 110 and extending through the coil frame 120. Oil flows through the oil passage 100 into the sensor assembly 100. When metal abrasive particles flow through the sensor frame 120, they cut the magnetic field lines of the coil 140, causing a change in the magnetic field. This causes a change in the impedance of the coil 140, generating a voltage signal, which is transmitted through a cable (i.e., the coil 140 is connected to the cable).

[0019] The filter assembly 300 includes an oil filter housing 320 mounted on one end face of the sensor housing 110 (at this time, the oil filter housing 320 is located on one side of the sensor housing 110) and a filter element unit 310 mounted inside the oil filter housing 320. The oil filter housing 320 has a receiving cavity and has an inlet and an outlet that communicate with the receiving cavity, so that the aforementioned oil enters the filter element unit 310 through the inlet, and then flows out of the filter element unit 310 and out through the outlet.

[0020] A one-way valve assembly 200 is installed between the filter assembly 300 and the sensor assembly 100 (using conventional installation methods, such as connection via bolts or other fasteners). This assembly includes a one-way valve body 210 installed between the sensor housing 110 and the filter housing 320, and a one-way valve core 220 adjustablely mounted on the one-way valve body 210. Specifically, a valve orifice is provided at the center of the one-way valve body 210, and the one-way valve core 220 is adjustablely mounted at the valve orifice to open or close the orifice (i.e., the one-way valve core 220 has two states: closed or open valve orifice, such as...). Figure 3 and Figure 4 (As shown). When the valve orifice is open, the aforementioned oil flows into the filter element unit 310 through the valve orifice; when the valve orifice is closed, the aforementioned oil cannot flow into the filter element unit 310.

[0021] The bypass valve assembly 400 includes a bypass valve body 410 installed within the receiving cavity and cooperating with the filter element unit 310, and a bypass valve core 420 adjustablely mounted on the bypass valve body 410. The cooperation between the bypass valve core 420 and the bypass valve body 410 is similar to the cooperation between the aforementioned check valve body 210 and check valve core 220; specifically, a valve hole is also provided at the center of the bypass valve body 410, and the bypass valve core 420 is adjustablely mounted at the valve hole to open or close the valve hole, such as... Figure 4 and Figure 5As shown. Specifically, the one-way valve assembly 200, the filter assembly 300, and the sensor assembly 100 are assembled and integrated by bolts. Under the preload generated by the thread tightening, the bypass valve assembly 400 achieves reliable positioning within the cavity by relying on its structural adaptation with the cavity of the filter assembly 300.

[0022] In this embodiment, the sensor assembly 100 further includes an electromagnetic shield 130 covering the periphery of the coil frame 120 to prevent the coil 140 from being interfered with by electromagnetic signals, magnetic fields, etc., from outside the oil abrasive sensor. The filter element unit 310 is as follows... Figure 6 and Figure 7 As shown, the filter includes an inner support column tube 311, a filter screen 312 formed on the outer surface of the inner support column tube 311, a pleated filter paper 313 disposed on the outer ring of the filter screen 312, and an outer support column tube 314 disposed on the outer ring of the pleated filter paper 313. The inner support column tube 311 and the outer support column tube 314 are independently provided with filter pores with a diameter of 100~800μm. The filter screen 312 is a filter screen with a diameter of 50~200μm, and the pleated filter paper 313 is a filter paper with a diameter of 10~50μm. The filter element unit 310 is a radially nested four-layer composite structure. The inner support column 311 and the outer support column 314 of the filter element have good rigidity and pre-filtration capabilities, which are used to withstand fluid pressure, block the impact of large particles, and improve the overall strength. The two middle layers are the filter screen 312 and the pleated filter paper 313, which respectively intercept 100~500μm coarse particles and 20~100μm fine particles, achieving graded filtration. The four-layer structure is based on the pore size gradient and functional synergy design to build an efficient and stable oil graded filtration system, thereby forming a gradient filtration path, enhancing the oil impurity retention capacity, and extending the service life of the lubrication system.

[0023] In this embodiment, the one-way valve assembly 200 further includes a one-way valve cover 240 disposed within the receiving cavity and cooperating with the one-way valve body 210, the one-way valve cover 240 being sealed to the inner wall of the receiving cavity. The one-way valve cover 240 has a one-way valve through hole and a first receiving hole coaxial with the one-way valve through hole at its center (the diameter of the first receiving hole is larger than the diameter of the one-way valve through hole and the first receiving hole does not penetrate the one-way valve cover 240, thus forming a first step between the first receiving hole and the one-way valve through hole); the one-way valve assembly 200 also includes a one-way valve spring 230 connected to the one-way valve core 220 and disposed within the first receiving hole, such that the one-way valve spring 230 abuts against the first step, and the one-way valve through hole corresponds to the oil through hole 100. When the pressure of the oil on the one-way valve core 220 exceeds the elastic force of the one-way valve spring 230, the one-way valve spring 230 is compressed, and the valve hole at the center of the one-way valve body 210 is opened. The oil enters the filter element unit 310 through the one-way valve through hole (at this time, the filter element unit 310 is installed between the one-way valve cover 240 and the bypass valve body 410, preferably with both ends of the filter element unit 310 embedded in the one-way valve cover 240 and the bypass valve body 410). At this time, the channel of the filter element unit 310 is normal, the filter hole is not blocked, the bypass valve body 410 is in the closed state, and the oil flows out from the outlet after being filtered by the filter element unit 310, returning to the engine, and so on.

[0024] In this embodiment, the bypass valve assembly 400 further includes a first groove formed on the bypass valve core 420, a second groove formed on the inner wall of the filter housing 320, and a bypass valve compression spring 430 disposed in the first and second grooves. A flow gap is formed between the circumferential surface of the bypass valve body 410 and the inner wall of the filter housing 320. The filter assembly 300 further includes an outlet filter screen 330 mounted on the filter housing 320 and cooperating with the liquid outlet, and an outlet filter screen cap 340 mounted on the filter housing 320 and covering the outlet filter screen 330. When the filter element unit 310 channel is abnormal and the filter holes are blocked, the oil cannot flow. When the pressure in the containment chamber exceeds the opening pressure of the bypass valve core 420 (that is, greater than the elastic force of the bypass valve spring 430), the bypass valve core 420 is opened. The oil does not pass through the filter element unit 310 and flows out through the bypass valve core 420 through the outlet filter screen 330 after coarse filtration, returning to the engine. This cycle repeats. The sensor signal count can be used to determine whether there is an internal blockage or abnormality.

[0025] Specifically, Figure 4The diagram shows the normal operating state of the filter circuit of the present invention. As shown, the oil enters from the inlet, passes through the sensor assembly 100, and when the metal abrasive particles flow through the sensor frame 120, they cut the magnetic field lines of the coil 140, causing a change in the magnetic field. This results in a change in the impedance of the coil 140, generating a voltage signal that is transmitted through a cable. Subsequently, the one-way valve core 220 is opened and enters the chamber of the filter assembly 300. At this time, the channel of the filter element assembly 310 is normal and not blocked, and the bypass valve body 410 is in the closed state. After being filtered by the filter element assembly 310, the oil flows out from the outlet and returns to the engine, thus repeating the cycle. Figure 5 This is a schematic diagram of the overload working state bypass valve core 420 opening, as shown in the figure. The front end works with... Figure 4 Similarly, the oil enters through the inlet, passes through the sensor assembly 100, and when the metal abrasive particles flow through the sensor frame 120, they cut the magnetic field lines of the coil 140, causing a change in the magnetic field. This results in a change in the impedance of the coil 140, generating a voltage signal that is transmitted through a cable. Subsequently, the one-way valve core 220 is opened, allowing the oil to enter the chamber of the filter assembly 300. At this time, the filter element assembly 310 is blocked due to an abnormality, preventing the oil from flowing. The pressure inside the chamber exceeds the opening pressure of the bypass valve core 420, causing the bypass valve core 420 to open. The oil bypasses the filter element assembly 310 and flows out through the bypass valve core 420 through the outlet filter screen 330 after coarse filtration, returning to the engine. This cycle repeats continuously. The sensor signal count can be used to determine whether there is an internal blockage or abnormality.

[0026] This invention integrates sensor monitoring and filtration functions into one unit, achieving compact interconnection through shared fluid pipelines. It completes the detection and filtration purification of abrasive particle size and material during a single oil flow, eliminating structural redundancy compared to traditional separate equipment, reducing system maintenance frequency, and is suitable for integrated intelligent operation and maintenance of aero-engine lubrication oil pipelines.

[0027] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An oil abrasive sensor with integrated filtration function, characterized in that, It includes: The sensor assembly (100) includes a sensor housing (110), a coil frame (120) mounted inside the sensor housing (110), a coil (140) wound on the coil frame (120), and an oil through hole (100) opened inside the sensor housing (110) and extending through the coil frame (120). The filter assembly (300) includes an oil filter housing (320) mounted on one end face of the sensor housing (110) and a filter element unit (310) mounted inside the oil filter housing (320). The oil filter housing (320) has a receiving cavity and has an inlet and an outlet connected to the receiving cavity. One-way valve assembly (200); the one-way valve assembly (200) includes a one-way valve body (210) mounted between the sensor housing (110) and the oil filter housing (320) and a one-way valve core (220) adjustablely mounted on the one-way valve body (210). A bypass valve assembly (400) includes a bypass valve body (410) installed in the receiving cavity and cooperating with the filter element unit (310) and a bypass valve core (420) adjustablely installed on the bypass valve body (410).

2. The oil abrasive sensor with integrated filtration function according to claim 1, characterized in that: The sensor assembly (100) also includes an electromagnetic shield (130) covering the periphery of the coil frame (120).

3. The oil abrasive sensor with integrated filtration function according to claim 1, characterized in that: The filter element unit (310) includes an inner support column tube (311), a filter screen (312) formed on the outer surface of the inner support column tube (311), a pleated filter paper (313) disposed on the outer ring of the filter screen (312), and an outer support column tube (314) disposed on the outer ring of the pleated filter paper (313).

4. The oil abrasive sensor with integrated filtration function according to claim 1, characterized in that: The one-way valve assembly (200) further includes a one-way valve cover (240) disposed in the receiving cavity and cooperating with the one-way valve body (210). The one-way valve cover (240) has a one-way valve through hole and a first receiving hole coaxial with the one-way valve through hole at its center. The one-way valve assembly (200) further includes a one-way valve compression spring (230) connected to the one-way valve core (220) and disposed in the first receiving hole. The one-way valve through hole corresponds to the oil through hole (100).

5. The oil abrasive sensor with integrated filtration function according to claim 1, characterized in that: The filter element unit (310) is installed between the one-way valve cover (240) and the bypass valve body (410).

6. The oil abrasive sensor with integrated filtration function according to claim 1, characterized in that: The bypass valve assembly (400) further includes a first groove formed on the bypass valve core (420), a second groove formed on the inner wall of the filter housing (320), and a bypass valve compression spring (430) disposed in the first groove and the second groove, wherein a flow gap is formed between the circumferential surface of the bypass valve body (410) and the inner wall of the filter housing (320).

7. The oil abrasive sensor with integrated filtration function according to claim 1, characterized in that: The filter assembly (300) further includes an outlet filter screen (330) mounted on the filter housing (320) and cooperating with the outlet, and an outlet filter screen cap (340) mounted on the filter housing (320) and covering the outlet filter screen (330).

8. The oil abrasive sensor with integrated filtration function according to claim 3, characterized in that: The inner support column tube (311) and the outer support column tube (314) of the filter element are independently provided with filter pores with a diameter of 100~800μm, the filter screen (312) is a filter screen with a diameter of 50~200μm, and the pleated filter paper (313) is a filter paper with a diameter of 10~50μm.

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