Rotating speed sensor structure and wire winding method

Abstract

The invention discloses a rotating speed sensor structure and a wire winding method, the rotating speed sensor structure comprises a shell, a skeleton, a coil, a permanent magnet assembly and a signal transmission assembly, the shell is internally provided with an installation chamber, the skeleton is fixedly installed in the installation chamber in the shell, the coil is wound on the outer surface of the skeleton, and the permanent magnet assembly is fixedly installed in the installation chamber. Insulating paint capable of resisting preset temperature is arranged between adjacent wire rods of the coil in a vacuum infiltration mode, the permanent magnet assembly is located in an installation chamber of the shell and used for providing a magnetic field for the coil, the signal input end of the signal transmission assembly is connected with the coil, and the signal output end of the signal transmission assembly is connected with the shell. And the signal transmission assembly is used for transmitting the signal generated by the coil. According to the invention, the insulating paint which can resist the preset temperature is infiltrated into the gaps in the coil, so that the coil can resist the preset temperature, and the sensor can meet the use environment with the preset temperature.

Description

Technical Field

[0001] The invention relates to the technical field of rotation speed sensors, in particular to a rotation speed sensor structure and a wire winding method. Background Art

[0002] In the field of speed sensor technology, especially in aviation, gas turbine and high temperature environment applications, although the traditional magnetoelectric speed sensor design has been widely adopted and has shown good performance, it still faces some key technical challenges, especially stability and reliability issues in high temperature environments.

[0003] The traditional magnetoelectric speed sensor is mainly composed of magnets, magnetic rods, skeletons, coils and shells. Its core working principle relies on the periodic change of the distance between the measured object (such as gears) and the sensor when it rotates, thereby inducing a voltage signal with the same frequency as the speed in the coil. This design can work effectively in a normal temperature environment, accurately measuring and converting the speed information into an electrical signal for subsequent processing and display.

[0004] However, with the increasing requirements for equipment performance in high-temperature environments in the fields of aviation and energy, the material selection of traditional speed sensors has become a bottleneck restricting their further application. Specifically, the coils used in traditional speed sensors are usually wound with enameled wires, most of which are made of organic insulating materials (such as polyimide) wrapped around copper core wires. Although this type of organic insulating material has good electrical insulation properties, its high-temperature resistance is limited and can usually only withstand a maximum temperature of about 240°C, which is far from meeting the long-term stable operation requirements in high-temperature environments (such as gas turbines and aircraft engines).

[0005] On the other hand, although inorganic materials have excellent high temperature resistance, they are difficult to process into filaments suitable for winding coils due to their brittle texture. The insulation layer is easily damaged during the winding process, causing poor insulation problems, thus limiting the direct application of inorganic materials in speed sensor coils.

[0006] To this end, we provide a speed sensor structure and a wire winding method to solve the above problems. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a rotation speed sensor structure and a wire winding method.

[0008] The purpose of the present invention is achieved through the following technical solutions:

[0009] A rotation speed sensor structure comprises a shell, a skeleton, a coil, a permanent magnet component and a signal transmission component, wherein the shell has an installation chamber inside, the skeleton is fixedly installed in the installation chamber inside the shell, the coil is wound on the outer surface of the skeleton, and insulating varnish that can withstand a preset temperature is provided between adjacent wires of the coil through vacuum infiltration, the permanent magnet component is located in the installation chamber of the shell, the permanent magnet component is used to provide a magnetic field for the coil, the signal input end of the signal transmission component is connected to the coil, and the signal transmission component is used to transmit the signal generated by the coil.

[0010] Preferably, the permanent magnet assembly includes a fixing ring fixedly installed in the installation chamber of the shell, a fixing plate is installed at the end of the fixing ring away from the skeleton, the fixing ring, the fixing plate and the skeleton define an accommodating cavity, a permanent magnet is fixedly installed in the accommodating cavity, a magnetic rod is provided at the end of the permanent magnet, and the magnetic rod is located in the center hole of the skeleton.

[0011] Preferably, the signal transmission component includes a connector connected to the housing opening, and the connector is connected to a signal line electrically connected to the skeleton.

[0012] Preferably, insulating sheets are fixedly provided at both ends of the wire trough of the skeleton.

[0013] Preferably, the coil comprises a first insulating tape wound on the outer surface of the skeleton wire slot, and the outer surface of the first insulating tape is alternately wound with insulating wires and second insulating tapes.

[0014] Preferably, a plurality of rows of through holes are evenly spaced apart on each layer of the second insulating tape; and the through holes on adjacent second insulating tapes are staggered.

[0015] Preferably, the thickness of the first insulating tape and the second insulating tape is 0.03 mm to 0.1 mm.

[0016] Preferably, the diameter of the through hole is between 1 mm and 2 mm.

[0017] The present application also provides a method for winding a rotation speed sensor wire, which is used for winding a rotation speed sensor structure described in any one of the above items, and specifically comprises:

[0018] S100: The coil is wound and arranged on the outer surface of the skeleton wire slot;

[0019] S200: The frame wound with the coil is immersed and placed in a container filled with insulating paint that can withstand a preset temperature;

[0020] S300: placing the skeleton in the container into a vacuum box;

[0021] S400: Evacuate the vacuum box to allow the insulating varnish to penetrate into the coil;

[0022] S500: After the infiltration of the coiled frame is completed, it is taken out from the vacuum box and then placed in an oven for baking. The baking conditions are: baking at a temperature of 110°C to 130°C for 1h to 3h to harden the insulating paint.

[0023] Preferably, in S300, the vacuum box pressure is set to 0.1Mpa to 0.5Mpa, the vacuum box is evacuated for 1h to 2h, then the air is released and left to stand for 5-10 minutes, and then the vacuum box is evacuated for another 1h to 2h to make the vacuum value 0.1Mpa to 0.5Mpa.

[0024] The present invention has the following advantages:

[0025] 1. The present invention allows the coil to withstand the preset temperature by infiltrating the gap in the coil with insulating varnish that can withstand the preset temperature. Therefore, the sensor can meet the use environment of the preset temperature.

[0026] 2. The present invention guides the permanent magnet to the position of the coil through the magnetic rod, thereby providing the magnetic field required for detection.

[0027] 3. The present invention transmits the signal generated by the coil to the connector through the signal line, and then transmits it to the device connected thereto through the connector, thereby realizing the transmission of the signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front cross-sectional schematic diagram of the present invention.

[0029] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0030] Figure 3 It is a three-dimensional cross-sectional schematic diagram of the present invention.

[0031] Figure 4 It is a schematic diagram of the overall explosion state of the present invention.

[0032] Figure 5 It is a schematic cross-sectional view of the estimated winding coil of the present invention.

[0033] Figure 6 For the present invention Figure 5 Enlarged structural diagram at A in the middle.

[0034] Figure 7 It is a partial structural schematic diagram of the second insulating tape of the present invention.

[0035] In the figure, 100, housing; 200, frame; 300, coil; 310, first insulating tape; 320, insulating wire; 330, second insulating tape; 340, through hole; 400, permanent magnet assembly; 410, fixing ring; 420, permanent magnet; 430, magnetic rod; 440, fixing plate; 500, signal transmission assembly; 510, connector; 520, signal line; 600, insulating sheet. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example:

[0039] The coil 300 used in the existing speed sensor is usually made of enameled wire. Although the coil 300 made of enameled wire has good conductivity and insulation, the insulating paint on the outer surface of the enameled wire can usually only withstand about 240°C, so it cannot meet the needs of some high temperature environments. For example, in high temperature fields such as gas turbines and aircraft engines, the insulating paint on the surface of the enameled wire will be damaged at this high temperature, thereby causing the speed sensor to fail or become insensitive.

[0040] Based on the above reasons, the present application provides a speed sensor structure. Specifically, the speed sensor structure includes a shell 100, a skeleton 200, a coil 300, a permanent magnet component 400 and a signal transmission component 500. The shell 100 has an installation chamber inside, and the skeleton 200 is fixedly installed in the installation chamber inside the shell 100. The coil 300 is wound on the outer surface of the skeleton 200, and insulating paint that can withstand a preset temperature is provided between adjacent wires of the coil 300 through vacuum infiltration. The permanent magnet component 400 is located in the installation chamber of the shell 100, and the permanent magnet component 400 is used to provide a magnetic field for the coil 300. The signal input end of the signal transmission component 500 is electrically connected to the coil 300, and the signal transmission component 500 is used to transmit the signal generated by the coil.

[0041] The coil 300 of the present application is wound with general enameled wire. Specifically, the coil 300 can be immersed in an insulating varnish that can withstand a preset temperature. Finally, the coil 300 after immersion is baked and cured, so that the enameled wire located inside the insulation can withstand the preset temperature. In this embodiment, the insulating varnish that the coil 300 can be immersed in can withstand a high temperature of at least 300 degrees. Of course, the insulating varnish that can withstand different temperatures can be selected according to actual needs, and the specific type of insulating varnish is not limited here.

[0042] Furthermore, the present application mainly converts the rotation speed of a rotating object (rotating shaft or the teeth of a measured wheel) into relevant voltage and frequency signals, so as to determine the size of the rotation speed. This part is described in detail below and will not be elaborated here.

[0043] See also Figures 1 to 4 As shown, the permanent magnet component 400 provides a magnetic field for the coil 300. When a rotating object (the object to be measured) approaches, the magnetic field near the sensor changes, causing the magnetic flux in the coil 300 to change, thereby generating a voltage, which is then transmitted to the outside through the signal transmission component 500, thereby realizing the conversion of the rotation speed into signal parameters such as voltage.

[0044] The permanent magnet assembly 400 includes a fixing ring 410 fixedly installed in the installation chamber of the shell 100, and a fixing plate 440 is installed at the end of the fixing ring 410 away from the skeleton 200. The fixing ring 410, the fixing plate 440 and the skeleton 200 define a accommodating cavity, and a permanent magnet 420 is fixedly installed in the accommodating cavity. A magnetic rod 430 is provided at the end of the permanent magnet 420, and the magnetic rod 430 is located in the center hole of the skeleton 200.

[0045] See also Figure 1 , Figure 3 and Figure 4 As shown, the magnetic lines of force in the permanent magnet 420 are guided to the position of the coil 300 by the magnetic rod 430, so that a magnetic field within a certain range is formed at the position of the coil 300, thereby achieving a change in the position of the magnetic field and guiding the magnetic field at the position of the permanent magnet 420.

[0046] The signal transmission component 500 includes a connector 510 connected to the opening of the housing 100 , and the connector 510 is connected to a signal line 520 that is electrically connected to the skeleton 200 .

[0047] See also Figures 1 to 4As shown, in this embodiment, the voltage signal generated by the coil 300 is mainly transmitted to the outside through the signal line 520. Specifically, the connector 510 can be connected to an external controller, computer, or other hardware device that can perform data analysis and processing. Furthermore, a data line can be used to connect the above-mentioned hardware device to the connector 510, so that the voltage signal generated by the coil 300 can be transmitted to the outside through the line formed by the signal line 520 and the connector 510.

[0048] Please continue reading Figure 1 As shown, in this embodiment, in order to facilitate the connection between the signal line 520 and the coil 300, an avoidance hole is opened on the fixing plate 440, and the signal line 520 passes through the avoidance hole of the fixing plate 440 to be electrically connected to the coil 300. .

[0049] It should be noted here that the purpose of setting the fixing plate 440 here is to seal the fixing ring 410 and the permanent magnet 420 to prevent the fixing ring 410 and the permanent magnet 420 from detaching from the housing 100. Furthermore, in order to facilitate the signal line to pass through the fixing plate 440 and connect with the coil 300, the number of holes on the fixing plate 440 is two. In practice, other numbers of holes can be opened as needed. Moreover, in this embodiment, the positions of the holes on the fixing plate 440 are not limited and can be set as needed.

[0050] Insulating sheets 600 are fixedly mounted at both ends of the wire slot of the frame 200 .

[0051] See also Figure 3 , Figure 5 and Figure 6 As shown, in order to prevent the coil 300 from being connected to the outside and causing a short circuit and the external environment from affecting it, insulating sheets 600 are set at both ends of the wire slot of the skeleton 200 for processing. The insulating sheets 600 are used to insulate the coil 300 from the skeleton 200 at the ends of the wire slot. The insulating sheets 600 can be made of organic plastics or inorganic ceramics. In this embodiment, the insulating sheet 600 is made of plastic. More specifically, it can be made of polyimide and other materials. In practice, other materials can be selected as needed, and there is no limitation here.

[0052] The coil 300 includes a first insulating tape 310 wound on the outer surface of the wire slot of the frame 200 , and the outer surface of the first insulating tape 310 is alternately wound with insulating wires 320 and second insulating tapes 330 , and the outermost layer is the second insulating tape 330 .

[0053] A plurality of rows of through holes 340 are evenly spaced apart on each layer of the second insulating tape 330 .

[0054] See also Figures 5 to 7As shown, the purpose of first setting the first insulating tape 310 on the outer surface of the wire trough of the skeleton 200 is to achieve insulation between the insulating wire 320 and the surface of the wire trough of the skeleton 200 through the first insulating tape 310, thereby improving the insulation degree. In this embodiment, the insulating wire 320 is a conductor with insulating paint on the outer surface, and ordinary enameled wire can be selected.

[0055] In one embodiment, the insulating wire 320 is wound in a sparsely wound manner in a wire groove on the skeleton 200, and the spacing between the insulating wires 320 is not limited here. The purpose of this is to accommodate more insulating varnish that can withstand a preset temperature, thereby improving the degree of high temperature resistance.

[0056] In this embodiment, the first insulating tape 310 and the insulating wire 320 are insulating tapes. Furthermore, the insulating tape can be polyimide insulating tape, and the voltage withstanding of polyimide insulating tape is generally about 4000V. Of course, in practice, other types of insulating tapes can also be selected under the premise of meeting the use requirements, which is not limited here.

[0057] It should be noted here that the materials used for the first insulating tape 310 and the insulating wire 320 can be the same or different as long as the use requirements are met. In the present embodiment, the first insulating tape 310 and the insulating wire 320 are made of the same material, and the difference between the two is that multiple rows of through holes 340 are evenly arranged on the outer surface of the insulating wire 320.

[0058] Specifically, the purpose of opening the through hole 340 on the outer surface of the second insulating tape 330 is that in the subsequent wetting process, the insulating varnish can enter the gap between the second insulating tape 330 and the insulating wire 320 and the gap between the insulating wire 320 through the through hole 340, so that the insulation completely covers the insulating wire 320, thereby improving the high temperature resistance of the insulating wire 320, and even if the insulating varnish on the surface of the insulating wire 320 fails at high temperature, a short circuit will not occur, because the insulating wire 320 is covered with the insulating varnish that can withstand the preset temperature, thereby achieving the insulation effect.

[0059] According to the above description, it can be seen that the description is made from the inside to the outside. The innermost first insulating tape 310 is used to isolate the insulating wire 320 from the skeleton 200 to achieve insulation, and then the insulating wire 320 is wound and set, and then the second insulating tape 330 and the insulating wire 320 are alternately wound and set, and finally the outermost is the second insulating tape 330. The purpose of winding the second insulating tape 330 on the outermost is to stick the outermost insulating wire 320 to prevent it from spreading, and then the signal line 520 is connected to the insulating wire 320 by welding to facilitate the subsequent signal transmission. After welding, the outermost is wrapped with the second insulating tape 330, and finally the signal line 520 is fixed to the coil 300 by aramid wire binding; it should be noted that this winding method can make the through hole 340 between the adjacent layers of the second insulating tape 330 form a channel for the insulating paint resistant to a preset temperature to pass through, so that the entire coil 300 is filled with insulating paint, and the through hole 340 meets the high temperature resistance requirement after the insulating paint in the coil 300 is cured.

[0060] See also Figures 5 to 7 As shown, the through holes 340 on adjacent second insulating bands 330 are arranged alternately, that is, the through holes 340 on adjacent layers are arranged alternately, and the centers of the through holes 340 on adjacent layers are no longer on the same plane.

[0061] Continue reading Figure 5 The purpose of staggered arrangement of the through holes 340 on adjacent second insulating tapes 330 is to prevent the insulating wires 320 from being concentrated at the through holes 340 after winding, so as to facilitate the insulating varnish to pass smoothly into the gaps between adjacent insulating wires 320 and the gaps between the insulating wires 320 and the second insulating tapes 330.

[0062] The aperture of the through hole 340 is between 1 mm and 2 mm, that is, the diameter of the through hole 340 can be any value between 1 mm and 2 mm, for example, it can be 1 mm, 1.5 mm or 2 mm. In the present embodiment, the diameter of the through hole 340 is 1.5 mm, and the corresponding diameter of the through hole 340 can be selected according to the diameter of the insulating wire 320. In practice, other diameter values ​​can be selected according to needs, including but not limited to the above examples.

[0063] In one embodiment, the thickness of the first insulating tape 310 and the second insulating tape 330 is 0.03 mm to 0.1 mm.

[0064] See also Figure 5 and Figure 6As shown, the thinner the first insulating tape 310 and the insulating wire 320 are, the more turns the insulating wire 320 can be wound around. Conversely, the thicker the first insulating tape 310 and the insulating wire 320 are, the fewer turns the insulating wire 320 can be wound around. Under the premise that the insulating wire 320 can be wound around a predetermined number of turns, the cost or production difficulty of the first insulating tape 310 and the insulating wire 320 must also be considered. Generally speaking, the thinner the product is, the more difficult it is to process. The first insulating tape 310 and the second insulating tape 330 can be selected to have a thickness of 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, and 0.1 mm. In this embodiment, the first insulating tape 310 and the insulating wire 320 are selected to have a thickness of 0.04 mm. In practice, they can be selected according to needs, and the specific thickness is not limited here.

[0065] The present application also discloses a method for winding a rotation speed sensor wire, which is used for winding any of the rotation speed sensor structures described above, and the method comprises:

[0066] S100: The coil 300 is wound and arranged on the outer surface of the wire slot of the frame 200;

[0067] Among them, the insulating wire 320 is then wound in a sparse winding manner and arranged in the wire groove on the surface of the skeleton 200. Specifically, a layer of the first insulating tape 310 is first wound on the outer surface of the skeleton 200, and then the insulating wire 320 and the second insulating tape 330 are alternately wound until the insulating wire 320 is wound with a predetermined number of turns and layers, and the outermost layer is the second insulating tape 330. For this purpose, the coil 300 is composed of the innermost layer of the first insulating tape 310 and the alternately wound multiple layers of insulating wires 320 and second insulating tapes 330.

[0068] S200: The frame 200 wound with the coil 300 is immersed and placed in a container filled with insulating paint that can withstand a preset temperature;

[0069] S300: placing the skeleton 200 in the container into a vacuum box;

[0070] S400: evacuating the vacuum box to allow the insulating varnish to penetrate into the coil 300;

[0071] In the process of vacuuming, the air in the gaps of the coil 300 is gradually extracted. Under the action of the pressure difference, the insulating paint that can withstand the preset temperature will enter these gaps, thereby covering the insulating wire 320, so that the outer surface of the insulating wire 320 is filled with high temperature that can withstand the preset temperature.

[0072] S500: After the infiltration is completed, the frame 200 wound with the coil 300 is taken out from the vacuum box and then put into an oven for baking. The baking conditions are: baking at a temperature of 110° C. to 130° C. for 1 hour to 3 hours to harden the insulating paint.

[0073] The baking temperature and time of the insulating paint can be selected according to different types of insulating paint, that is, the temperature and time of different types of insulating paint are also different. The selection is adaptively made according to the curing temperature and time of the insulating paint. In the present embodiment, the baking temperature in the above baking conditions is 110°C, 120°C or 130°C, and the baking time can be selected as 1h, 2h or 3h. In the present embodiment, in order to consider energy consumption and efficiency, the baking temperature is selected as 120 degrees and the baking time is selected as 2h. The purpose of baking is to harden the insulating paint; in the above S300, the vacuum box pressure value is set to 0.1Mpa~0.5Mpa, the vacuum box is evacuated for 1h~2h, then deflated and left to stand for 5-10 minutes, and then evacuated for 1h~2h to make the vacuum value 0.1Mpa~0.5Mpa.

[0074] In this embodiment, the pressure value of the vacuum box is set according to the size of each sensor, and can also be set according to the number of coils 300. The more layers of coils 300, the greater the vacuum value and the longer the vacuuming time. Furthermore, the purpose of standing still after deflation is to expel bubbles that may exist in the insulating paint, prevent the bubbles from staying inside the coil 300, and improve the wetting effect. Then, vacuuming again can further allow the insulating paint to enter the interior of the coil 300, ensure the uniformity of the insulating paint in the coil, and further improve the quality of the sensor.

[0075] In the above, the vacuum pressure value can be set to 0.1Mpa, 0.2Mpa, 0.3Mpa, 0.4Mpa and 0.5Mpa, etc., and the vacuum can be drawn for 1h, 1.5h, 2h, etc. In the embodiment, the vacuum pressure value can be selected to be 0.3Mpa, and then the vacuum is drawn for 1.5h.

[0076] The working process of the present invention is as follows: the speed sensor disclosed in the present application has a probe, which can be the end of a magnetic rod 430. When the teeth of the gear of the object to be measured or the protrusion of the rotating shaft are close to the speed sensor disclosed in the present application, the magnetic field distribution at the position of the probe is changed, resulting in a change in the magnetic flux in the coil 300, thereby generating a forward output voltage. When the object to be measured suddenly moves away from the probe, the coil 300 generates a reverse output voltage, thereby forming a signal similar to a sine wave. As the object to be measured rotates, it continuously approaches or moves away from the sensor, so the sensor in the application will generate a signal related to the speed and frequency, and then transmit the signal to an external hardware device through a signal line 520 for analysis, thereby obtaining the speed. The specific analysis process is not elaborated here, and this part is well known to those skilled in the art.

[0077] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotation speed sensor structure, characterized in that: include: A housing (100), wherein the housing (100) has an installation chamber therein; A frame (200), the frame (200) being fixedly installed in an installation chamber inside the housing (100); A coil (300), wherein the coil (300) is wound on the outer surface of the frame (200), and insulating varnish capable of withstanding a preset temperature is provided between adjacent wires of the coil (300) through vacuum infiltration; a permanent magnet component (400), the permanent magnet component (400) being located in the installation chamber of the housing (100), and the permanent magnet component (400) being used to provide a magnetic field for the coil (300); A signal transmission component (500), wherein a signal input end of the signal transmission component (500) is connected to the coil (300), and the signal transmission component (500) is used to transmit the signal generated by the coil (300).

2. The rotation speed sensor structure according to claim 1, characterized in that: The permanent magnet assembly (400) includes a fixing ring (410) fixedly installed in the installation chamber of the housing (100), and a fixing plate (440) is installed at the end of the fixing ring (410) away from the frame (200). The fixing ring (410), the fixing plate (440) and the frame (200) define a receiving cavity, and a permanent magnet (420) is fixedly installed in the receiving cavity. A magnetic rod (430) is provided at the end of the permanent magnet (420), and the magnetic rod (430) is located in the center hole of the frame (200).

3. The rotation speed sensor structure according to claim 1, characterized in that: The signal transmission component (500) includes a connector (510) connected to an opening of the housing (100), and the connector (510) is connected to a signal line (520) electrically connected to the skeleton (200).

4. The rotation speed sensor structure according to claim 1, characterized in that: Insulating sheets (600) are fixedly provided at both ends of the wire slot of the frame (200).

5. The rotation speed sensor structure according to claim 1, characterized in that: The coil (300) comprises a first insulating tape (310) wound on the outer surface of the wire slot of the frame (200), and the outer surface of the first insulating tape (310) is alternately wound with insulating wires (320) and second insulating tapes (330).

6. The rotation speed sensor structure according to claim 5, characterized in that: A plurality of rows of through holes (340) are evenly spaced apart on each layer of the second insulating tape (330), and the through holes (340) on adjacent second insulating tapes (330) are arranged in a staggered manner.

7. The rotation speed sensor structure according to claim 5, characterized in that: The thickness of the first insulating tape (310) and the second insulating tape (330) is 0.03 mm to 0.1 mm.

8. The rotation speed sensor structure according to claim 6, characterized in that: The diameter of the through hole (340) is between 1 mm and 2 mm.

9. A method for winding a rotation speed sensor wire, used for winding a rotation speed sensor structure according to any one of claims 1 to 8, characterized in that: include: S100: The coil (300) is wound and arranged on the outer surface of the wire slot of the frame (200); S200: the frame (200) wound with the coil (300) is immersed and placed in a container filled with insulating paint capable of withstanding a preset temperature; S300: placing the skeleton (200) in the container into a vacuum box; S400: evacuating the vacuum box to allow the insulating varnish to penetrate into the coil (300); S5 00: After the infiltration is completed, the frame (200) wound with the coil (300) is taken out from the vacuum box and then placed in an oven for baking. The baking conditions are: baking at a temperature of 110° C. to 130° C. for 1 h to 3 h to harden the insulating paint.

10. A method for winding a rotation speed sensor wire according to claim 9, characterized in that: In S300, the pressure value of the vacuum box is set to 0.1Mpa-0.5Mpa, the vacuum box is evacuated for 1h-2h, then the air is released and left to stand for 5-10 minutes, and then the vacuum box is evacuated for another 1h-2h to a vacuum value of 0.1Mpa-0.5Mpa.

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