Multifunctional electrode for oil oxidation test and oil oxidation test system and method

Abstract

The invention provides a multifunctional electrode for an oil oxidation test, and an oil oxidation test system and method. The multifunctional electrode comprises a main body frame, an electrode plate, a metal coil, a wiring terminal and a mounting assembly, the main body frame comprises an upper end cover, a lower end cover and a plurality of stand columns, and an internal cavity is formed among the three; the wiring terminals comprise two first wiring terminals, two second wiring terminals and a plurality of third wiring terminals; the two first wiring terminals are fixed with the two metal plates of the electrode plate; the two second wiring terminals are connected with the metal coil; the third wiring terminal is connected with an electronic component; the mounting assembly is located in the internal cavity. The multifunctional electrode provided by the invention simulates the oil service condition in a complex scene to a great extent, realizes the oxidation decay test of oil under the coupling action of multiple physical fields such as electricity, magnetism, heat, oxygen and metal, and also realizes the synchronous monitoring of material compatibility, compatibility of electronic components and oil, corrosion and electrical performance in the oil oxidation process.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil detection, and in particular relates to a multifunctional electrode for oil oxidation testing, an oil oxidation testing system and a method. Background Art

[0002] As a core component of lubricants, lubricating base oils have expanded their application from traditional industrial equipment (such as engines and gearboxes) to applications where electricity, magnetism, heat, oxygen, and complex materials coexist, including new energy vehicle drive motors, high-power charging stations, electrochemical energy storage systems, and data center immersion cooling. In these scenarios, the oil must function for long periods in a multi-field coupled environment where electric and magnetic fields, high temperatures, oxidation, and complex materials coexist. Its performance stability and material compatibility are directly related to equipment reliability.

[0003] The oil evaluation technology in the existing technology (such as patents CN215812773U and CN114113551A) mainly focuses on the influence of single factors such as heat, oxygen, moisture and metal catalysis on the oxidation stability of oil products. The test methods include standard experiments such as DKA oxidation (CEC L-48-A-00), but cannot realize oil performance testing and real-time monitoring under complex working conditions coupled with multiple scenarios such as electromagnetic, high temperature and oxidation. Electric field and magnetic field, as basic thermodynamic parameters, will significantly change the dielectric properties and polarization behavior of oil, thereby affecting its insulation and anti-aging ability. Although the invention patent CN102628819A discloses a test device for evaluating the oxidation stability of transformer oil under high-voltage AC or DC electric field, it has a complex structure, low integration, limited electrical performance monitoring indicators, and cannot simultaneously evaluate key parameters such as metal corrosion, which limits its application in related fields.

[0004] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a multifunctional electrode, an oil oxidation testing system and a method for oil oxidation testing, which are used to solve the problem in the prior art that the performance evaluation of oils serving in electromagnetic environments cannot fully consider the combined coupling effects of multiple factors such as electricity, magnetism, metal corrosion and material compatibility.

[0006] To achieve the above-mentioned and other related objectives, the present invention provides a multifunctional electrode for oil oxidation testing, characterized in that the multifunctional electrode comprises:

[0007] A main frame, the main frame comprising an upper end cover, a lower end cover, and a plurality of columns, the plurality of columns being circumferentially distributed along the lower surface of the upper end cover and vertically fixed between the upper end cover and the lower end cover, and forming an internal cavity between the plurality of columns and the upper end cover and the lower end cover;

[0008] An electrode plate, comprising two symmetrically arranged metal plates, both of which are vertically arranged in the internal cavity;

[0009] A metal coil, wherein the metal coil is formed by winding a metal wire along the outer surface of the plurality of pillars;

[0010] The wiring terminals are arranged above the upper end cover, and include two first wiring terminals, two second wiring terminals, and a plurality of third wiring terminals; the two first wiring terminals are fixedly connected to the upper ends of the two metal plates to implement electric field loading; the two second wiring terminals are respectively connected to the starting end and the ending end of the metal coil to implement magnetic field loading and oil metal corrosion testing; the third wiring terminals are connected to electronic components through wires, and the electronic components are located in the internal cavity to implement compatibility testing of the oil and the electronic components;

[0011] A mounting assembly is fixed below the upper end cover and located in the internal cavity, and is used for mounting compatibility testing materials.

[0012] Preferably, the plurality of columns are evenly distributed circumferentially along the lower surface of the upper end cover, and at least three columns are provided.

[0013] Preferably, a plurality of grooves are formed on the surface of each column along the circumferential direction, and the plurality of grooves are arranged parallel to each other, and the grooves are used to fix the metal wires.

[0014] Preferably, each of the metal plates includes an upper metal plate and a lower metal plate, the lateral spacing between the two upper metal plates is greater than the lateral spacing between the two lower metal plates, and the internal space between the two upper metal plates is used to accommodate the compatibility test material mounted on the mounting assembly.

[0015] Preferably, each of the lower metal plates is provided with at least two threaded holes, the insulating screws pass through the two corresponding threaded holes in sequence, and the lateral distance between the two lower metal plates is adjusted by the insulating gasket.

[0016] Preferably, each of the lower metal plates is provided with a circulation hole, the circulation hole being located between two adjacent threaded holes, and the circulation hole being used for the circulation of oil.

[0017] Preferably, the multifunctional electrode further comprises a gripping mechanism, which is fixed to the top end of the main frame, and is used to place the multifunctional electrode into or take it out of the oxidation container.

[0018] Preferably, the gripping mechanism, the upper end cover, the lower end cover and the column are all made of oil-resistant solid insulating material.

[0019] The present invention also provides an oil oxidation test system, the oil oxidation test system comprising the above-mentioned multifunctional electrode for oil oxidation testing; and

[0020] Compatibility testing materials, the compatibility testing materials being hung on the mounting assembly;

[0021] an electronic component fixed in the internal cavity via a third terminal;

[0022] An electromagnetic field loading unit, the electromagnetic field loading unit comprising an electric field loading power supply and a magnetic field loading power supply, the electric field loading power supply being connected to the two first wiring terminals via a wire to implement electric field loading during the oil testing process; the magnetic field loading power supply being connected to the two second wiring terminals via a wire to excite a magnetic field through the metal coil to implement magnetic field loading during the oil testing process;

[0023] A test unit, comprising a resistance test device, a withstand voltage test device, an impedance test device, and an electronic test device; the resistance test device is connected to the two second terminals via a wire to test the metal corrosion performance of the oil; the withstand voltage test device is connected to the two first terminals via a wire to test the breakdown voltage during the oil test; the impedance test device is connected to the two first terminals via a wire to test the impedance value during the oil test; and the electronic test device is connected to the third terminal via a wire to test the performance of electronic components under oil immersion conditions;

[0024] A control unit is electrically connected to the electric field loading power supply, the magnetic field loading power supply, the resistance testing equipment, the withstand voltage testing equipment, the impedance testing equipment and the electronic testing equipment.

[0025] The present invention also provides an oil oxidation test method, which uses the above-mentioned oil oxidation test system to perform an oil oxidation test, and specifically includes the following steps:

[0026] The compatibility test material is hung on the mounting object, and the multifunctional electrode is immersed in the heated oil through the gripping mechanism to perform an oil oxidation test. After the test, the compatibility test material is taken out and its physical property changes are tested, thereby achieving material compatibility testing;

[0027] Connecting a magnetic field loading power supply to the two second wiring terminals through a wire, and connecting an electric field loading power supply to the two third wiring terminals through a wire;

[0028] Connecting a resistance test device to the two second wiring terminals via wires, connecting a withstand voltage test device to the two first wiring terminals via wires, connecting an impedance test device to the two first wiring terminals via wires, and connecting the electronic test device to the third wiring terminal via wires;

[0029] The control unit controls the on and off of different circuits through programs, thereby realizing the testing of electric field, magnetic field loading and various electrical signals.

[0030] As described above, the multifunctional electrode, oil oxidation testing system, and method for oil oxidation testing of the present invention have the following beneficial effects:

[0031] The multifunctional electrode in the present invention includes a main frame consisting of an upper end cover, a lower end cover and multiple columns, and also includes an electrode plate, a metal coil, a terminal and a mounting assembly. The electrode plate is connected to the two first terminals to realize electric field loading, the metal coil is connected to the two second terminals to realize magnetic field loading and oil metal corrosion testing, and the third terminal is connected to the electronic components through a wire to realize the compatibility test of the oil and electronic components. In addition, the compatibility test material is mounted through the mounting assembly to realize the material compatibility test; the present invention is based on an integrated oil oxidation test system based on a multifunctional electrode, which is used for the comprehensive performance evaluation of oil under an electromagnetic coupling environment. It not only simulates the oil service conditions in complex scenes to a large extent, realizes the oxidation decay test of oil under the coupling of multiple physical fields such as electricity, magnetism, heat, oxygen, and metal, but also realizes the synchronous monitoring of material compatibility, compatibility between electronic components and oil, corrosion and electrical properties during the oil oxidation process, which is of great significance to promoting the development and application of oil serving in an electromagnetic environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Shown is a schematic structural diagram of a multifunctional electrode for oil oxidation testing in a specific embodiment of the present invention.

[0033] Figure 2 Shown is a schematic diagram of the exploded structure of the electrode plate in a specific embodiment of the present invention.

[0034] Figure 3Shown is a structural schematic diagram of an oil oxidation testing system in a specific embodiment of the present invention.

[0035] Component number description

[0036] 101 upper end cover

[0037] 102 lower end cover

[0038] 103 columns

[0039] 1031 Groove

[0040] 104 internal cavity

[0041] 105 end plate

[0042] 200 gripping mechanism

[0043] 300 Metal Plate

[0044] 301 upper metal plate

[0045] 3011 fixing hole

[0046] 302 lower metal plate

[0047] 3021 Insulated Screws

[0048] 3022 Insulation Nut

[0049] 3023 Insulation Gasket

[0050] 3024 Flow hole

[0051] 401 first terminal

[0052] 402 Second terminal

[0053] 403 third terminal

[0054] 4031 electronic components

[0055] 500 Mounting Components

[0056] 501 Compatibility Test Materials

[0057] 601 Electric Field Loading Power Supply

[0058] 602 Magnetic Field Loading Power Supply

[0059] 603 Resistance Testing Equipment

[0060] 604 Hipot test equipment

[0061] 605 Impedance Test Equipment

[0062] 606 Electronic testing equipment

[0063] 6071 Computer

[0064] 6072 Control Circuit DETAILED DESCRIPTION

[0065] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0066] Before further describing the specific embodiments of the present invention, it should be understood that the scope of the present invention is not limited to the specific embodiments described below. It should also be understood that the terminology used in the examples is intended to describe specific embodiments and is not intended to limit the scope of the present invention. The experimental procedures in the following examples, where specific conditions are not specified, were generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0067] When the embodiments provide numerical ranges, it should be understood that, unless otherwise specified in the present invention, both endpoints of each numerical range and any numerical value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those generally understood by those skilled in the art. In addition to the specific methods, equipment, and materials used in the embodiments, according to the understanding of the prior art by those skilled in the art and the description of the present invention, any methods, equipment, and materials of the prior art similar or equivalent to the methods, equipment, and materials described in the embodiments of the present invention may also be used to implement the present invention.

[0068] See also Figures 1 to 3 It should be noted that the diagrams provided in this embodiment are merely schematic illustrations of the basic concept of the present invention. Therefore, the diagrams only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0069] The oil evaluation methods in the existing technology mainly focus on the effects of heat, oxygen, moisture and metal catalysis on the oxidation stability and material compatibility of oil products. In the fields of new energy vehicle electric drive systems, data center immersion cooling and immersion cooling electrochemical energy storage, the service conditions of oil are relatively complex. The present invention provides a multifunctional electrode to restore the oil service conditions in complex scenarios to a large extent, and realize the oxidation decay test of oil under the multi-physical coupling effects of electricity, magnetism, heat, oxygen, metal corrosion and material compatibility, and realize the synchronous monitoring of the compatibility, corrosion, electrical properties, etc. of materials, electronic components and oil during the oil oxidation process.

[0070] The present invention provides a multifunctional electrode for oil oxidation testing, which includes a main frame, an electrode plate, a metal coil, a terminal block and a mounting assembly 500; wherein the main frame includes an upper end cover 101, a lower end cover 102 and a plurality of columns 103, the plurality of columns 103 are circumferentially distributed along the lower surface of the upper end cover 101 and are vertically fixed between the upper end cover 101 and the lower end cover 102, and an internal cavity 104 is formed between the plurality of columns 103 and the upper end cover 101 and the lower end cover 102; the electrode plate includes two symmetrically arranged metal plates 300, and the two metal plates 300 are vertically arranged in the internal cavity 104; the metal coil (not shown in the figure) is formed by winding a metal wire along the outer surface of the plurality of columns 103; the terminal block is arranged Above the upper end cover 101, the wiring terminals include two first wiring terminals 401, two second wiring terminals 402 and multiple third wiring terminals 403; the two first wiring terminals 401 are fixedly connected to the upper ends of the two metal plates 300 to realize electric field loading; the two second wiring terminals 402 are respectively connected to the starting end and the ending end of the metal coil to realize magnetic field loading and oil metal corrosion testing; the third wiring terminals 403 are connected to the electronic components 4031 through wires, and the electronic components 4031 are located in the internal cavity 104 to realize the compatibility test of the oil and the electronic components 4031; the mounting assembly 500 is fixed below the upper end cover 101 and is located in the internal cavity 104, and is used to mount the compatibility test material 501.

[0071] Specifically, the upper end cover 101 is parallel to the lower end cover 102 and is separated by a plurality of vertically arranged columns 103 to form an internal cavity 104; the electrode plate and the terminal are both made of conductive materials, preferably metal conductive materials; the metal coil is wound with metal wires, and the metal wires are made of copper, silver, and iron, which are easily corroded by oil; the diameter of the metal wire is usually less than 0.5mm, preferably, the diameter of the metal wire is less than 0.25mm, but it is necessary to ensure that the metal wire has sufficient strength and is not easy to break; more preferably, the metal wire is made of copper and has a diameter of 0.2mm; there are at least two third terminal blocks 403, that is, a group, and can also be set to 4, each group of third terminal blocks 403 are symmetrically arranged, and the electronic components 4031 are connected to the symmetrically distributed third terminal blocks 403 through wires to realize the compatibility test of oil and electronic components 4031. The specific structure of the mounting assembly 500 is not limited here. The mounting assembly 500 is used to mount the compatibility testing material 501 in the internal cavity 104 to implement material compatibility testing.

[0072] As an example, the upper end cover 101 and the lower end cover 102 are both discs or rings.

[0073] As an example, a plurality of columns 103 are evenly distributed circumferentially along the lower surface of the upper end cover 101 , and at least three columns 103 are provided.

[0074] Specifically, the upper end cap 101 is a closed circular disc or partially hollow ring; the number of columns 103 can be three, four, five, or six. Preferably, the upper end cap 101 and the lower end cap 102 are discs or rings less than 10 mm thick, and at least three columns 103 greater than 10 mm in length ensure parallel and concentric alignment of the upper and lower end caps 101, 102. More preferably, the upper and lower end caps 101, 102 are 2 mm to 5 mm thick and have the same diameter.

[0075] In one embodiment of the present invention, see Figure 1 As shown, the upper end cover 101 and the lower end cover 102 are hollow rings with the same diameter. The thickness of the upper end cover 101 is 2.0 mm. The parallelism and concentricity of the upper end cover 101 and the lower end cover 102 are achieved by six columns 103 with a length of 90 mm.

[0076] In one embodiment of the present invention, the upper end cover 101 is in the shape of a ring, and the end plate 105 is fixed to the ring-shaped upper end cover 101 via symmetrical second terminal blocks 402. The other first terminal blocks 401 and third terminal blocks 403 are also fixed to the end plate 105. The material of the end plate 105 is preferably polytetrafluoroethylene.

[0077] When the upper end cover 101 is in the shape of a disc, the end plate 105 may not be provided. In this case, the connection terminals are all symmetrically fixed on the upper end cover 101 .

[0078] As an example, a plurality of grooves 1031 are formed on the surface of each column 103 along the circumferential direction. The plurality of grooves 1031 are arranged parallel to each other, and the grooves 1031 are used to fix the metal wires.

[0079] For details, see Figure 1 Each column 103 is provided with a plurality of grooves 1031, with each pair of adjacent grooves 1031 arranged in parallel. The number of grooves 1031 provided on each column 103 should be consistent. The metal coil is formed by winding a metal wire along the outer surface of the plurality of columns 103. The starting end of the metal wire is connected to one of the second terminals 402, and the other end is wound along the grooves 1031 on the same plane. After winding one circle, it is wound around the groove 1031 on the next adjacent plane and then wound around. After winding around the groove 1031 on the last plane, the ending end of the metal wire is connected to another second terminal 402, thereby forming a metal coil. The metal wire is embedded in the grooves 1031 of the column 103 to prevent the metal wires on two adjacent planes from contacting each other.

[0080] In addition, in order to better fix the metal wire, two holes are opened on any column 103, and the two holes are respectively located at the upper and lower ends of the groove 1031. The starting end of the metal wire is connected to one of the second wiring terminals 402, and the other end passes through one hole and is wound into a metal coil on the column 103. The metal wire is embedded in the groove 1031 of the column 103, and the ending end of the metal wire passes through the other hole, so that the metal wire is connected to the other second wiring terminal 402. For the arrangement of the holes on the column, see Figure 1 Each column is provided with two holes, which makes the winding of the metal coil more diverse, but there is no restriction here. In actual application, any two holes can meet the use requirements.

[0081] As an example, each metal plate 300 includes an upper metal plate 301 and a lower metal plate 302 , the lateral spacing between the two upper metal plates 301 is greater than the lateral spacing between the two lower metal plates 302 , and the internal space between the two upper metal plates 301 is used to accommodate the compatibility test material 501 mounted on the mounting assembly 500 .

[0082] In one embodiment of the present invention, see Figure 2The top of the upper metal plate 301 is also provided with a wiring ear, which has a fixing hole 3011. The first terminal 401 fixes the metal plate 300 to the lower surface of the upper end cover 101 through the corresponding fixing hole 3011. Then, each metal plate 300 is connected to the corresponding first terminal 401 through a wire to achieve electric field loading. After the tops of the two upper metal plates 301 are fixed, the distance between the two upper metal plates 301 is fixed. Figure 1 As shown, in a specific embodiment of the present invention, the lateral distance between the two upper metal plates 301 is much greater than the lateral distance between the two lower metal plates 302 .

[0083] For example, see Figure 2 Each lower metal plate 302 has at least two threaded holes, and the insulating screws 3021 pass through the two corresponding threaded holes in sequence, and the lateral distance between the two lower metal plates 302 is adjusted by the insulating gasket 3023.

[0084] Specifically, each lower metal plate 302 has at least two threaded holes, and two, three or more threaded holes can be opened. There is no excessive restriction here, but it is necessary to ensure that the number of threaded holes opened on the two metal plates is the same, and the positions of the threaded holes are set correspondingly; the insulating gasket 3023 is set between the two lower metal plates 302 to separate the two lower metal plates 302. After the insulating screw 3021 passes through the two corresponding threaded holes, the open end of the insulating screw 3021 is fixed by the insulating nut 3022, thereby fixing the distance between the two lower metal plates 302.

[0085] In one example of the present invention, two lower metal plates 302 are located in the internal cavity 104, and the lateral spacing between the two lower metal plates 302 is adjusted by insulating screws 3021, insulating nuts 3022 and insulating gaskets 3023. Preferably, the lateral spacing is the thickness of the insulating gasket 3023, and the thickness of the insulating gasket 3023 is preferably 1 mm.

[0086] As an example, each lower metal plate 302 is provided with a circulation hole 3024 . The circulation hole 3024 is located between two adjacent threaded holes. The circulation hole 3024 is used for the circulation of oil.

[0087] For details, see Figure 2 Each lower metal plate 302 has two threaded holes, and the flow hole 3024 is located between the two threaded holes. If each lower metal plate 302 has three threaded holes, a flow hole 3024 can be opened between any two adjacent threaded holes. Of course, a flow hole 3024 can also be opened between every two adjacent threaded holes. There is no excessive restriction here, as long as the flow of oil is guaranteed.

[0088] As an example, the multifunctional electrode further includes a gripping mechanism 200 , which is fixed to the top end of the main frame. The multifunctional electrode is placed into or taken out of the oxidation container through the gripping mechanism 200 .

[0089] Preferably, the gripping mechanism 200 is located at a central position above the upper end cover 101 and is connected to the upper end cover 101 by screws.

[0090] In one example of the present invention, see Figure 1 When the upper end cover 101 is in a hollow circular ring, an end plate 105 is fixed to the upper surface of the upper end cover 101. The end plate 105 is arranged along the diameter direction of the upper end cover 101, and the gripping mechanism 200 is fixed to the central position of the end plate 105 by screws; preferably, the two ends of the end plate 105 are fixed to the circular ring of the upper end cover 101 through symmetrically arranged second wiring terminals 402; more preferably, the first wiring terminals 401 are symmetrically arranged on the end plate 105, and the third wiring terminals 403 are also arranged on the end plate 105.

[0091] Specifically, the end plate 105 is made of oil-resistant solid insulating material, preferably polytetrafluoroethylene. As an example, the gripping mechanism 200, the upper end cover 101, the lower end cover 102 and the column 103 are all made of oil-resistant solid insulating material.

[0092] Preferably, the gripping mechanism 200 , the upper end cover 101 , the lower end cover 102 and the column 103 are all made of polytetrafluoroethylene.

[0093] In addition, the present invention also provides an oil oxidation test system, which includes the multifunctional electrode for oil oxidation test described above, as well as compatibility test material 501, electronic components 4031, an electromagnetic field loading unit, a test unit, and a control unit;

[0094] Wherein, the compatibility test material 501 is hung on the mounting component 500;

[0095] The electronic component 4031 is fixed in the internal cavity 104 via the third terminal 403;

[0096] The electromagnetic field loading unit includes an electric field loading power supply 601 and a magnetic field loading power supply 602. The electric field loading power supply 601 is connected to the two first wiring terminals 401 via wires to achieve electric field loading during the oil test; the magnetic field loading power supply 602 is connected to the two second wiring terminals 402 via wires to excite the magnetic field through the metal coil to achieve magnetic field loading during the oil test.

[0097] The test unit includes a resistance test device 603, a withstand voltage test device 604, an impedance test device 605, and an electronic test device 606. The resistance test device 603 is connected to the two second terminals 402 via wires to test the metal corrosion performance of the oil. The withstand voltage test device 604 is connected to the two first terminals 401 via wires to test the breakdown voltage during the oil test. The impedance test device 605 is connected to the two first terminals 401 via wires to test the impedance value during the oil test. The electronic test device 606 is connected to the third terminal 403 via wires to test the performance of the electronic component 4031 under oil immersion conditions.

[0098] The control unit is electrically connected to the electric field loading power supply 601 , the magnetic field loading power supply 602 , the resistance testing device 603 , the withstand voltage testing device 604 , the impedance testing device 605 and the electronic testing device 606 .

[0099] Specifically, the electric field loading power supply 601 includes a DC power supply or an AC power supply, and the electric field loading power supply 601 is connected to the two first terminals 401 of the electrode plate through a wire combination control unit, thereby realizing electric field loading during the oil test process; the magnetic field loading power supply 602 includes a DC power supply or an AC power supply, and the magnetic field loading power supply 602 is connected to the two first terminals 401 of the metal coil through a wire combination control unit, and the magnetic field is excited by the metal coil, thereby realizing magnetic field loading during the oil test process; the resistance testing device 603 is connected to the two second terminals 402 of the metal coil through a wire combination control unit. When the oil corrodes the metal wire, the diameter of the metal wire is deformed and its resistance value Increased, thereby testing the metal corrosion performance of the oil; the withstand voltage test equipment 604 is connected to the two first terminals 401 of the electrode plate through a wire combination control unit, thereby realizing the test of the breakdown voltage during the oil test; the impedance test equipment 605 is connected to the two first terminals 401 of the electrode plate through a wire combination control unit, thereby realizing the test of the impedance value during the oil test; the electronic components 4031 include electronic components 4031 such as capacitors and resistors, and the electronic components 4031 are connected to the third terminal 403 through a wire, and then combined with related electronic testing equipment 606 such as capacitors, electronics and oscilloscopes to realize real-time performance testing of the electronic components 4031 under oil immersion conditions.

[0100] See Figure 3 The control unit includes a computer 6071 and a control circuit 6072. The control circuit 6072 can be integrated or distributed. The control circuit 6072 is composed of several communication relays. The computer 6071 can be combined with bus technology, PLC control and related instruments and components to realize program control of the on and off of different circuits, thereby realizing electromagnetic field loading and testing of various electrical signals.

[0101] In a specific embodiment of the present invention, the electric field loading power supply 601 adopts an IT6953A DC power supply; the magnetic field loading power supply 602 adopts an IT-M7723 AC power supply; the resistance testing equipment 603 is a GOM-804 micro-ohmmeter; the withstand voltage testing equipment 604 is a GPT-9804 safety meter; and the impedance testing equipment 605 adopts a TH2827C digital bridge.

[0102] In addition, the present invention also provides an oil oxidation test method, which uses the above-mentioned oil oxidation test system to perform an oil oxidation test, and specifically includes the following steps:

[0103] The compatibility test material 501 is hung on a mounting object, and the multifunctional electrode is immersed in heated oil via the gripping mechanism 200 to perform an oil oxidation test. After the test, the compatibility test material 501 is removed and its physical property changes are tested, thereby achieving material compatibility testing; wherein, the physical properties include volume, hardness, and mechanical properties;

[0104] Connect the magnetic field loading power supply 602 to the two second wiring terminals 402 through wires to achieve magnetic field loading, and connect the electric field loading power supply 601 to the two third wiring terminals 403 through wires to achieve electric field loading;

[0105] Connect the resistance tester 603 to the two second terminals 402 via wires, connect the withstand voltage tester 604 to the two first terminals 401 via wires, connect the impedance tester 605 to the two first terminals 401 via wires, and connect the electronic tester 606 to the third terminal 403 via wires.

[0106] The control unit controls the on and off of different circuits through programs, thereby realizing the testing of electric field, magnetic field loading and various electrical signals.

[0107] Specifically, the order of the above steps is not restricted here. The resistance testing device 603 is used to test the metal corrosion performance of the oil, the voltage testing device 604 is used to implement the breakdown voltage test during the oil testing process, the impedance testing device 605 is used to implement the impedance value test during the oil testing process, and the electronic testing device 606 is used to implement the performance test of the electronic component 4031 under oil immersion conditions.

[0108] In summary, the multifunctional electrode of the present invention includes a main frame consisting of an upper end cap, a lower end cap and a plurality of columns, and also includes an electrode plate, a metal coil, a terminal and a mounting assembly. The electrode plate is connected to the two first terminals to realize electric field loading, the metal coil is connected to the two second terminals to realize magnetic field loading and oil metal corrosion testing, and the third terminal is connected to the electronic component through a wire to realize the compatibility test of the oil and the electronic component. In addition, the compatibility test material is mounted by the mounting assembly to realize the material compatibility test. The present invention is based on the multifunctional electrode integrated oil oxidation test system, which is used for the comprehensive performance evaluation of the oil under the electromagnetic coupling environment. It not only simulates the oil service conditions of complex scenes to a large extent, realizes the oxidation decay test of the oil under the coupling of multiple physical fields such as electricity, magnetism, heat, oxygen, and metal, but also realizes the simultaneous monitoring of material compatibility, electronic component and oil compatibility, corrosion and electrical properties during the oil oxidation process, which is of great significance to promoting the development and application of oil service under electromagnetic environment. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has high industrial utilization value.

[0109] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A multifunctional electrode for oil oxidation testing, characterized in that: The multifunctional electrode comprises: A main frame, the main frame comprising an upper end cover, a lower end cover, and a plurality of columns, the plurality of columns being circumferentially distributed along the lower surface of the upper end cover and vertically fixed between the upper end cover and the lower end cover, and forming an internal cavity between the plurality of columns and the upper end cover and the lower end cover; An electrode plate, comprising two symmetrically arranged metal plates, both of which are vertically arranged in the internal cavity; A metal coil, wherein the metal coil is formed by winding a metal wire along the outer surface of the plurality of pillars; The wiring terminals are arranged above the upper end cover, and include two first wiring terminals, two second wiring terminals, and a plurality of third wiring terminals; the two first wiring terminals are fixedly connected to the upper ends of the two metal plates to implement electric field loading; the two second wiring terminals are respectively connected to the starting end and the ending end of the metal coil to implement magnetic field loading and oil metal corrosion testing; the third wiring terminals are connected to electronic components through wires, and the electronic components are located in the internal cavity to implement compatibility testing of the oil and the electronic components; A mounting assembly is fixed below the upper end cover and located in the internal cavity, and is used for mounting compatibility testing materials.

2. The multifunctional electrode for oil oxidation testing according to claim 1, characterized in that: The plurality of columns are evenly distributed circumferentially along the lower surface of the upper end cover, and at least three columns are provided.

3. The multifunctional electrode for oil oxidation testing according to claim 1, characterized in that: A plurality of grooves are formed on the surface of each column along the circumferential direction. The plurality of grooves are arranged parallel to each other and are used to fix the metal wires.

4. The multifunctional electrode for oil oxidation testing according to claim 1, characterized in that: Each of the metal plates includes an upper metal plate and a lower metal plate, the lateral spacing between the two upper metal plates is greater than the lateral spacing between the two lower metal plates, and the internal space between the two upper metal plates is used to accommodate the compatibility test material mounted on the mounting assembly.

5. The multifunctional electrode for oil oxidation testing according to claim 4, characterized in that: Each of the lower metal plates is provided with at least two threaded holes, and the insulating screws pass through the two corresponding threaded holes in sequence, and the lateral distance between the two lower metal plates is adjusted by the insulating gasket.

6. The multifunctional electrode for oil oxidation testing according to claim 5, characterized in that: A circulation hole is provided on each of the lower metal plates. The circulation hole is located between two adjacent threaded holes and is used for the circulation of oil.

7. The multifunctional electrode for oil oxidation testing according to claim 1, characterized in that: The multifunctional electrode further comprises a gripping mechanism, which is fixed to the top end of the main frame. The multifunctional electrode is placed into or taken out of the oxidation container through the gripping mechanism.

8. The multifunctional electrode for oil oxidation testing according to claim 7, characterized in that: The gripping mechanism, the upper end cover, the lower end cover and the column are all made of oil-resistant solid insulating material.

9. An oil oxidation test system, characterized in that: The oil oxidation test system comprises the multifunctional electrode for oil oxidation test according to any one of claims 1 to 8; as well as Compatibility testing materials, the compatibility testing materials being hung on the mounting assembly; an electronic component fixed in the internal cavity via a third terminal; An electromagnetic field loading unit, the electromagnetic field loading unit comprising an electric field loading power supply and a magnetic field loading power supply, the electric field loading power supply being connected to the two first wiring terminals via a wire to implement electric field loading during the oil testing process; the magnetic field loading power supply being connected to the two second wiring terminals via a wire to excite a magnetic field through the metal coil to implement magnetic field loading during the oil testing process; A testing unit, comprising a resistance testing device, a withstand voltage testing device, an impedance testing device, and an electronic testing device; The resistance test device is connected to the two second terminals via wires to test the metal corrosion performance of the oil; the withstand voltage test device is connected to the two first terminals via wires to test the breakdown voltage during the oil test; the impedance test device is connected to the two first terminals via wires to test the impedance value during the oil test; the electronic test device is connected to the third terminal via wires to test the performance of electronic components under oil immersion conditions; A control unit is electrically connected to the electric field loading power supply, the magnetic field loading power supply, the resistance testing equipment, the withstand voltage testing equipment, the impedance testing equipment and the electronic testing equipment.

10. A method for testing oil oxidation, characterized in that: The oil oxidation test method is to perform an oil oxidation test using the oil oxidation test system described in claim 9, specifically comprising the following steps: The compatibility test material is hung on the mounting object, and the multifunctional electrode is immersed in the heated oil through the gripping mechanism to perform an oil oxidation test. After the test, the compatibility test material is taken out and its physical property changes are tested, thereby achieving material compatibility testing; Connecting a magnetic field loading power supply to the two second wiring terminals through a wire, and connecting an electric field loading power supply to the two third wiring terminals through a wire; Connecting a resistance test device to the two second wiring terminals via wires, connecting a withstand voltage test device to the two first wiring terminals via wires, connecting an impedance test device to the two first wiring terminals via wires, and connecting the electronic test device to the third wiring terminal via wires; The control unit controls the on and off of different circuits through programs, thereby realizing the testing of electric field, magnetic field loading and various electrical signals.

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