Wireless passive temperature sensor, wind turbine gearbox and wireless passive temperature measurement system

Abstract

A wireless passive temperature sensor (10), comprising: a rod body (11), which comprises a measurement end (111) and a transmitting end (112); a measurement pin (12), which is arranged on the measurement end (111); and a transmitting antenna (13), which is arranged on the transmitting end (112) and is electrically connected to the measurement pin (12), wherein the rod body (11) is elongated, the measurement end (111) being configured to extend into a planetary plain bearing (50) from an axial end surface (52) of the planetary plain bearing (50), such that the measurement pin (12) is located at the axial midpoint of the planetary plain bearing (50), and the transmitting end (112) being configured to abut against the axial end surface (52) of the planetary plain bearing (50), such that the transmitting antenna (13) is located outside the planetary plain bearing (50). While enabling measurement of the temperature at the axial center of the planetary plain bearing (50), the temperature sensor, which is of an elongated structure and does not require integration of a battery module, occupies less space, facilitating replacement of the planetary plain bearing (50). Further disclosed are a wind turbine gearbox and a wireless passive temperature measurement system.

Description

Wireless passive temperature sensor, wind turbine gearbox and wireless passive temperature measurement system Technical Field

[0001] The present invention relates to the technical field of wind turbines, and in particular to a wireless passive temperature sensor, a wind turbine gearbox and a wireless passive temperature measurement system. Background Art

[0002] With the development of offshore wind power, large-megawatt wind turbines are the future development trend. At the same time, the reduction in the cost of electricity has put more stringent requirements on the cost and operational reliability of wind turbine gearboxes. Planetary bearings are key components in wind turbine gearboxes. If the planetary bearings fail, the wind turbine gearbox will fail, resulting in a large amount of maintenance time and cost waste. Therefore, the temperature of the planetary bearings in the wind turbine gearbox needs to be accurately and real-time monitored. A temperature sensor is usually installed in the wind turbine gearbox to measure the temperature of the planetary bearings.

[0003] In the known related technologies, temperature sensors used for measuring the temperature of planetary sliding bearings include: infrared temperature sensors, temperature sensors with electric slip rings, and active wireless temperature sensors with batteries.

[0004] Infrared temperature sensors enable contactless temperature measurement. For example, when measuring the temperature through the peephole of a wind turbine gearbox, a specific point on a planetary sliding bearing is measured. However, if you want to measure this point again, it is difficult to confirm it. Because as the planetary sliding bearing rotates, the point prone to high temperatures will also rotate. It is difficult to confirm that the points measured multiple times are at the same location on the same structure. Therefore, infrared temperature sensors are not suitable for measuring the temperature of rotating planetary sliding bearings.

[0005] The temperature sensor of a powered slip ring can be powered and output using wires. However, this requires a large installation space, can only measure the surface temperature of the planetary bearing, is prone to wear, and has a short lifespan. Furthermore, the power supply and signal transmission of the temperature sensor of a powered slip ring require wires, which must be routed inside the wind turbine gearbox. This increases the difficulty of installation and the probability of failure due to the rotating components within the wind turbine gearbox.

[0006] Active wireless temperature sensors with batteries integrate additional battery modules and transmit temperature signals wirelessly. However, these batteries are bulky, which inevitably affects the integration of the temperature sensor with the planetary sliding bearing. Furthermore, once a wind turbine gearbox is assembled in a wind farm, it is typically not disassembled until the end of the wind turbine's service life, as this would be time-consuming and labor-intensive. However, the batteries in active wireless temperature sensors with integrated battery modules have a limited lifespan and are prone to running low after a period of use, necessitating regular battery replacement. This, in turn, requires disassembly of the entire wind turbine gearbox housing.

[0007] It can be seen that temperature sensors with powered slip rings and active wireless temperature sensors with batteries are only suitable for short-term testing and are not suitable for long-term temperature status monitoring of planetary bearings. In short, the temperature sensors currently used in planetary sliding bearings are difficult to meet the needs of planetary sliding bearing temperature measurement.

[0008] Summary of the Invention

[0009] In order to overcome the problems existing in the related art, the present disclosure provides a wireless passive temperature sensor, a wind turbine gearbox and a wireless passive temperature measurement system.

[0010] According to a first aspect of an embodiment of the present disclosure, the present disclosure provides a wireless passive temperature sensor, comprising: a rod body, comprising a detection end and a transmitting end; a detection pin, arranged at the detection end; and a transmitting antenna, arranged at the transmitting end and electrically connected to the detection pin, wherein the rod body is slender, the detection end is used to extend into the planetary sliding bearing from the axial end face of the planetary sliding bearing, so that the detection pin is located at the axial midpoint of the planetary sliding bearing, and the transmitting end is used to abut against the axial end face of the planetary sliding bearing, so that the transmitting antenna is located outside the planetary sliding bearing.

[0011] In some embodiments, the detection end is provided with a retractable pin and a spring, the retractable pin is elastically connected to the rod body through the spring, and the detection pin is provided at the end of the retractable pin away from the spring.

[0012] In some embodiments, the rod body is a telescopic rod structure.

[0013] In some embodiments, the wireless passive temperature sensor also includes an anti-rotation gasket, which is sleeved on the outside of the rod body and abuts between the axial end face of the planetary sliding bearing and the transmitting end of the rod body, wherein the anti-rotation gasket includes a fixing plate, which is used to be inserted into the fixing hole of the axial end face of the planetary sliding bearing to limit the rotation of the anti-rotation gasket relative to the planetary sliding bearing.

[0014] In some embodiments, the launching end of the rod body is non-circular, and the anti-rotation gasket also includes an anti-rotation plate, which is bent toward one side of the launching end to form a non-circular space. The launching end is located in the non-circular space and abuts against the inner wall of the non-circular space.

[0015] In some embodiments, the launch end of the rod body is hexagonal in shape, and the anti-rotation plate includes four plates, which respectively abut against four sides of the launch end.

[0016] In some embodiments, a first toothed portion is provided at the edge of the launch end of the rod body, and a second toothed portion is provided at the edge of the anti-rotation plate. The second toothed portion is bent toward the launch end and inserted into the tooth groove of the first toothed portion.

[0017] According to a second aspect of an embodiment of the present disclosure, the present disclosure provides a wind turbine gearbox, comprising: a wireless passive temperature sensor as described in the first aspect, a planetary shaft and a planetary gear, wherein the planetary gear sleeve is arranged on the outside of the planetary shaft; wherein the outer wall of the planetary shaft and the inner wall of the planetary gear abut to form a planetary sliding bearing, the planetary sliding bearing includes a mounting hole, the mounting hole extends from the axial end face of the planetary sliding bearing to the axial midpoint of the planetary sliding bearing, and the mounting hole is located at the axial end face of the planetary shaft or the planetary gear.

[0018] In some embodiments, an extending direction of the mounting hole is parallel to an axial direction of the planetary sliding bearing.

[0019] According to a third aspect of an embodiment of the present disclosure, the present disclosure provides a wireless passive temperature measurement system based on radio frequency identification technology, comprising: a wireless passive temperature sensor as described in the first aspect; a processor antenna, connected to the wireless passive temperature sensor via radio frequency identification technology for contactless communication; a processor, connected to the processor antenna via wires; and a server, connected to the processor via wires or wirelessly.

[0020] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: the slender wireless passive temperature sensor can detect the temperature inside the axial center of the planetary sliding bearing, and detect the position with the highest temperature and the most prone to fracture. In addition, the slender wireless passive temperature sensor occupies a small volume, and when the planetary sliding bearing with a temperature sensor is replaced with a planetary sliding bearing without a temperature sensor, it does not occupy additional space in the wind turbine gearbox. Moreover, the temperature sensor can obtain energy through radio frequency technology, without an integrated battery, thus avoiding battery replacement and reducing the space occupied by the temperature sensor. In addition, the temperature sensor is installed by the axial end face of the planetary sliding bearing, which is easy to install, and the transmitting end with the transmitting antenna is located outside the axial end face, which is convenient for communication connection with the processor antenna, so that the wireless passive temperature sensor can obtain sufficient working energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0022] FIG1 is a schematic diagram of a wireless passive temperature measurement system based on radio frequency identification technology according to an exemplary embodiment;

[0023] FIG2 is a cross-sectional view of a planetary sliding bearing and a temperature sensor according to an exemplary embodiment;

[0024] FIG3 is a schematic diagram of the three-dimensional structure of the temperature sensor in FIG2 ;

[0025] FIG4 is a schematic diagram of a three-dimensional structure of a planet shaft and an anti-rotation washer according to an exemplary embodiment;

[0026] FIG5 is a schematic structural diagram of the anti-rotation plate of the anti-rotation gasket in FIG4 when it is not bent;

[0027] FIG6 is a schematic structural diagram of the anti-rotation plate of the anti-rotation gasket in FIG4 after being bent;

[0028] FIG. 7 is a partial enlarged schematic diagram of point A in FIG. 4 . DETAILED DESCRIPTION

[0029] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0030] In order to better understand the present invention, the structure of the wireless passive temperature sensor of the wind turbine gearbox 100 of the present invention is described in detail below with reference to Figures 2 to 7. Figure 2 shows a sectional perspective view of the wind turbine gearbox 100 after the wireless passive temperature sensor is installed according to an embodiment of the present invention, wherein the axial direction of the wind turbine gearbox 100 is represented by A, and the radial direction is represented by R. In addition, "communication connection" means that two devices or components can communicate through the transmission of signals, which can be a wireless communication connection. "Fixed connection" means that the two components can achieve a torque-resistant connection through interference fit and bolt connection, so that there is no relative movement between the two components.

[0031] To address the aforementioned technical issues, the present disclosure provides a wind turbine gearbox. According to embodiments of the present invention, the wind turbine gearbox is suitable for installation in a wind turbine generator set, providing a speed-increasing transmission. Typically, the rotor's rotational speed is very low, far below the speed required by the generator. The wind turbine gearbox accelerates the rotor's speed under the influence of wind power through a gear pair, increasing the speed to the required speed and transmitting it to the generator.

[0032] As shown in Figure 2 , the wind turbine gearbox includes a planetary sliding bearing 50 and a temperature sensor 10. The temperature sensor 10 is fixed to the planetary sliding bearing 50 and is used to measure and monitor the temperature of the planetary sliding bearing 50. The wind turbine gearbox obtains and processes the temperature of the planetary sliding bearing 50 through a wireless passive temperature measurement system 200. As shown in Figure 1 , in addition to the aforementioned temperature sensor 10, the wireless passive temperature measurement system 200 also includes a processor antenna 20, a processor 30, and a server 40.

[0033] As shown in FIG1 , the temperature sensor 10 is connected to the processor antenna 20 via contactless communication using radio frequency identification technology; the processor antenna 20 is electrically connected to the processor 30 , and the processor 30 is also electrically connected to the server 40 .

[0034] The wireless passive temperature measurement system 200 is implemented based on radio frequency identification (RFID) technology. In this embodiment, the temperature sensor 10 is a wireless passive temperature sensor 10. Specifically, the processor antenna 20 is used to transmit a radio frequency signal of a specific frequency to the temperature sensor 10. When the temperature sensor 10 enters the effective working area, an induced current is generated, thereby obtaining energy and activating the system. The temperature sensor 10 transmits the measured temperature signal through the built-in temperature sensor antenna 10. The processor antenna 20 receives the modulated temperature signal sent from the temperature sensor 10 and transmits it to the processor 30 for processing. The processor 30 then sends the processed signal to the server 40.

[0035] The temperature sensor 10 in this embodiment does not require additional power supply batteries or wires, avoiding the arrangement of wires or batteries in the wind turbine gearbox. The structure and design are simpler, there is no risk of explosion under high temperature or collision, making the system more stable and reducing the volume of the temperature sensor 10 and the space occupied in the wind turbine gearbox.

[0036] The wireless passive temperature sensor 10 is wireless and more suitable for moving or rotating parts. In particular, in wind turbine gearboxes, wired temperature sensors 10 are almost unusable due to their complex structure and oil environment.

[0037] The wireless passive temperature sensors 10 have a long service life and require no maintenance. They can be used throughout the entire life of the wind turbine gearbox. Therefore, they can record the temperature of the wind turbine gearbox planetary sliding bearings 50 in all operating states. By timely analyzing this temperature data, major accidents can be predicted and prevented.

[0038] Furthermore, the axial center of the planetary sliding bearing 50 is close to the load area, so the temperature at this position is also the highest. According to experience, the position with the highest temperature is also the position where the oil film of the planetary sliding bearing 50 is easily broken. The oil film is the lubricating oil film formed by lubricating grease or lubricant on the outer wall of the planetary sliding bearing 50. The rupture of the oil film can easily lead to wear of the planetary sliding bearing 50 and shorten its service life.

[0039] As can be seen from the background technology, the infrared temperature sensor 10, the temperature sensor 10 with electric slip ring and the active wireless temperature sensor 10 with battery in the related technology are all unable to measure the temperature at the center of the load area of ​​the planetary sliding bearing 50, and cannot play the role of monitoring the temperature of the planetary sliding bearing 50.

[0040] To this end, as shown in Figure 2, planetary sliding bearing 50 includes a mounting hole 51 extending from an axial end face 52 of planetary sliding bearing 50 to its axial midpoint; that is, the opening of mounting hole 51 is located at axial end face 52 of planetary sliding bearing 50, and the bottom of mounting hole 51 is located at the axial midpoint of planetary sliding bearing 50. A wireless passive temperature sensor 10 is inserted into mounting hole 51 to measure the temperature at the axial center of planetary sliding bearing 50, thereby determining the maximum temperature of planetary sliding bearing 50, enabling server 40 to conduct timely analysis, make predictions, and prevent major accidents.

[0041] It should be noted that the bottom of the mounting hole 51 is located at the axial midpoint of the planetary sliding bearing 50, which does not necessarily mean that it is located at the axial center of the planetary sliding bearing. It can be determined according to the position of the high-temperature point where the oil film is prone to rupture. It can be located to the right of the center point, as shown in Figure 2, close to the opening of the mounting hole, or it can be located to the left of the center point. No specific limitation is made here.

[0042] 3 , the wireless passive temperature sensor 10 includes a rod 11, a detection pin 12, and a transmitting antenna 13. The mounting hole 51 is elongated, and the rod 11 is also elongated, and the shape of the rod 11 matches the shape of the mounting hole 51.

[0043] The rod 11 includes a detection end 111 and a transmission end 112 along its length. A detection pin 12 is provided at the detection end 111, and a transmission antenna 13 is provided at the transmission end 112. The transmission antenna 13 is electrically connected to the detection pin 12. After the detection pin 12 detects the temperature of the planetary sliding bearing 50, it transmits the temperature signal to the transmission antenna 13, which then transmits the signal to the processor antenna 20.

[0044] Among them, the detection end 111 of the rod body 11 can be extended into the mounting hole 51 of the planetary sliding bearing 50, so that the detection pin 12 is located at the axial midpoint of the planetary sliding bearing 50, and the radial dimension of the transmitting end 112 can be larger than the aperture of the mounting hole 51, so that the transmitting end 112 can abut against the axial end face 52 of the planetary sliding bearing 50, and the transmitting antenna 13 located at the transmitting end 112 is located outside the planetary sliding bearing 50. Therefore, the transmitting antenna 13 is convenient for communication connection with the processor antenna 20, so that the wireless passive temperature sensor 10 can obtain sufficient working energy.

[0045] Furthermore, the slender rod 11 occupies a small volume within the planetary sliding bearing 50, eliminating the need to redesign the structure of the planetary sliding bearing 50 when replacing one without the temperature sensor 10. This minimizes design changes and verification work, allowing for the replacement of planetary sliding bearings 50 with and without temperature sensors 10. Furthermore, due to its small size, the rod 11 does not occupy additional space within the wind turbine gearbox, and other components adjacent to the planetary sliding bearing 50 do not require structural changes. Furthermore, the temperature sensor 10 is inserted externally from the axial end face 52 of the planetary sliding bearing 50, making installation easy.

[0046] In some embodiments, the extending direction of the mounting hole 51 is parallel to the axial direction of the planetary sliding bearing 50. That is, the mounting hole 51 extends along the axial direction of the planetary sliding bearing 50. In this way, when machining the mounting hole 51, the position of the mounting hole 51 is easier to calibrate.

[0047] In other embodiments, the mounting hole 51 may also be tilted, and in this case, the rod 11 of the corresponding temperature sensor 10 is also tilted. In this way, the detection pin 12 of the detection end 111 of the rod 11 can be adjusted according to the location of the point where high temperature is likely to occur, so as to be closer to the heat source (i.e., the optimal detection position), making the temperature detection of the wireless passive temperature measurement system 200 more accurate and more realistically reflecting the working status of the planetary sliding bearing 50.

[0048] Furthermore, in some embodiments, the detection end 111 of the rod body 11 is provided with a retractable pin and a spring (not shown in the figure), the retractable pin is elastically connected to the rod body 11 via the spring, and the detection pin 12 is provided at the end of the retractable pin away from the spring. The retractable pin can be moved relative to the rod body 11 by the spring to change the position of the detection pin 12. When the rod body 11 is inserted into the mounting hole 51, the retractable pin is elastically connected to the rod body 11, so that the detection pin 12 located at the end of the retractable pin can always abut against the bottom of the mounting hole 51. When the planetary sliding bearing 50 rotates, the detection pin 12 can accurately measure the temperature at the axial center of the planetary sliding bearing 50, and the position of the detection pin 12 can also be stabilized.

[0049] Furthermore, the rod body 11 may also be a telescopic rod structure. Specifically, the rod body 11 itself can be telescopic, so that the temperature sensor 10 can be adapted to mounting holes 51 of different lengths, thereby increasing the adaptability of the temperature sensor 10 to different planetary sliding bearings 50. At the same time, it also reduces the machining accuracy of the mounting holes 51 on the planetary sliding bearings 50.

[0050] In this embodiment, the transmitting end 112 of the rod body 11 of the temperature sensor 10 can be threadedly connected to the mounting hole 51 of the planetary sliding bearing 50 , thereby making the installation of the wireless passive temperature sensor 10 more convenient.

[0051] Furthermore, as shown in Figures 4 to 7, the wind turbine gearbox also includes an anti-rotation gasket 60. As shown in Figures 4 and 7, a through hole 61 is provided in the middle of the anti-rotation gasket 60, so that the anti-rotation gasket 60 can be sleeved on the outside of the rod body 11. After the launch end 112 of the rod body 11 is connected to the planetary sliding bearing 50 through a thread, the anti-rotation gasket 60 abuts between the axial end face 52 of the planetary sliding bearing 50 and the launch end 112 of the rod body 11.

[0052] The anti-rotation washer 60 can increase the friction between the transmitting end 112 of the rod body 11 and the axial end face 52 of the planetary sliding bearing 50, thereby strengthening the connection between the temperature sensor 10 and the planetary sliding bearing 50. The anti-rotation washer 60 can also prevent the transmitting end 112 from directly contacting the axial end face 52 of the planetary sliding bearing 50, thereby reducing wear on the axial end face 52 of the planetary sliding bearing 50 and extending the service life of the planetary sliding bearing 50.

[0053] Furthermore, as shown in Figures 5 and 6, the anti-rotation gasket 60 includes a fixing plate 62, and the axial end face 52 of the planetary sliding bearing 50 is provided with a fixing hole 53. The fixing plate 62 is inserted into the fixing hole 53, which can limit the rotation of the anti-rotation gasket 60 relative to the planetary sliding bearing 50.

[0054] In some embodiments, the transmitting end 112 of the rod body 11 is non-circular, as shown in Figures 5 and 6. The anti-rotation gasket 60 also includes an anti-rotation plate 63, which is bent toward the side of the axial end face 52 away from the planetary sliding bearing 50 to form a non-circular space 64. The transmitting end 112 of the rod body 11 is located in the non-circular space 64 and abuts against the inner wall of the non-circular space 64, thereby preventing the non-circular transmitting end 112 from rotating, and preventing the rod body 11 of the temperature sensor 10 from falling off due to long-term rotation of the planetary sliding bearing 50.

[0055] In this embodiment, the emitting end 112 of the rod body 11 may be hexagonal in shape, and the anti-rotation plate 63 may include four plates, each of which abuts against the four sides of the emitting end 112. In other embodiments, the emitting end 112 of the rod body 11 may also be triangular, quadrilateral, trapezoidal, or any other irregular shape, and the non-circular space 64 formed by the anti-rotation plate 63 may match the shape of the emitting end 112.

[0056] In other embodiments, the transmitting end 112 of the rod body 11 can be circular or non-circular, and a first tooth-shaped portion is provided at the edge of the transmitting end 112, and a second tooth-shaped portion is provided at the edge of the anti-rotation plate 63. The second tooth-shaped portion is bent toward the transmitting end 112 and inserted into the tooth groove of the first tooth-shaped portion, which can also prevent the transmitting end 112 from rotating.

[0057] In this embodiment, as shown in Figure 2, the wind turbine gearbox includes a planetary shaft 70 and a planetary gear 80, and the planetary gear 80 is sleeved on the outside of the planetary shaft 70; wherein the outer wall of the planetary shaft 70 and the inner wall of the planetary gear 80 abut to form a planetary sliding bearing 50, and the mounting hole 51 is located on the axial end face 52 of the planetary shaft 70 or the axial end face 52 of the planetary gear 80.

[0058] In some other embodiments, the planetary sliding bearing 50 may also be a separate part independent of the planetary shaft 70 or the planetary gear 80. When the axial end face 52 of the planetary sliding bearing 50 is large enough, the temperature sensor 10 may also be set on the independent planetary sliding bearing 50. No specific limitation is made here.

[0059] In addition, the rod body 11 of the temperature sensor 10 can be cylindrical, square, triangular, rhombic or any other irregular cylindrical shape. The shape of the rod body 11 can be set according to the shape of the mounting hole 51.

[0060] Based on the same inventive concept, the present disclosure also provides a wireless passive temperature measurement system 200 based on radio frequency identification technology. The specific methods of implementing the functions in the wireless passive temperature measurement system 200 based on radio frequency identification technology have been described in detail in the embodiment of the wireless passive temperature sensor 10 and will not be elaborated here.

[0061] The working environment inside the wind turbine gearbox is complex and may be filled with lubricating oil, which poses a great challenge to the transmission of temperature data between the transmitting antenna 13 and the processor antenna 20 of the temperature sensor 10. Electromagnetic simulation was performed. It is assumed that the space between the transmitting antenna 13 and the processor antenna 20 is filled with lubricating oil. The output power of the processor antenna 20 is about 30dBi, and the power loss transmitted in the oil is less than 13.01dBi. The simulation results show that the receiving power of the transmitting antenna 13 is greater than 16.99dBi, which is sufficient for the wireless passive temperature sensor 10 to work normally. The simulation results show that the temperature measurement failure risk of the wireless passive temperature sensor 10 disclosed in the present invention is low, and the wireless passive temperature sensor 10 disclosed in the present invention is suitable for temperature measurement of the planetary sliding bearing 50 in the wind turbine gearbox.

[0062] It is understood that in this disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of related objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0063] It will be further understood that the terms "first," "second," and the like are used to describe various structures, but these structures should not be limited to these terms. These terms are merely used to distinguish structures of the same type from one another and do not indicate a particular order or degree of importance. In fact, the expressions "first," "second," and the like are fully interchangeable. For example, a first structure could also be referred to as a second structure, and similarly, a second structure could also be referred to as a first structure without departing from the scope of this disclosure.

[0064] It can be further understood that the terms "center", "longitudinal", "lateral", "front", "back", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation.

[0065] It is further understood that, unless otherwise specified, “connection” includes a direct connection where there are no other components between the two elements, and also includes an indirect connection where there are other elements between the two elements.

[0066] It is further understood that although operations are described in a particular order in the drawings in the embodiments of the present disclosure, this should not be construed as requiring that the operations be performed in the particular order shown or in a serial order, or that all of the operations shown be performed to obtain the desired results. In certain circumstances, multitasking and parallel processing may be advantageous.

[0067] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0068] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A wireless passive temperature sensor (10), characterized in that, Planetary sliding bearing (50) for a wind power gearbox The wireless passive temperature sensor (10) includes: a rod body (11) including a detection end (111) and a transmitting end (112); A detection pin (12) disposed at the detection end (111); and A transmitting antenna (13) disposed at the transmitting end (112) and electrically connected to the detection pin (12), wherein the rod body (11) is elongated, the detection end (111) is for extending into the planetary sliding bearing (50) from an axial end face (52) of the planetary sliding bearing (50) so that the detection pin (12) is located at the axial midpoint of the planetary sliding bearing (50), and the transmitting end (112) is for abutting against the axial end face (52) of the planetary sliding bearing (50) so that the transmitting antenna (13) is located outside the planetary sliding bearing (50).

2. The wireless passive temperature sensor (10) according to claim 1, wherein The detection end (111) is provided with a shrink pin and a spring, the shrink pin is elastically connected to the rod body (11) through the spring, and the detection pin (12) is disposed at an end of the shrink pin away from the spring.

3. The wireless passive temperature sensor (10) according to claim 1, wherein The rod body (11) is a telescopic rod structure.

4. The wireless passive temperature sensor (10) according to claim 1, wherein The wireless passive temperature sensor (10) further includes an anti-rotation gasket (60), the anti-rotation gasket (60) is sleeved outside the rod body (11) and abuts between the axial end face (52) of the planetary sliding bearing (50) and the transmitting end (112) of the rod body (11), wherein the anti-rotation gasket (60) includes a fixing plate (62), and the fixing plate (62) is for inserting into a fixing hole (53) of the axial end face (52) of the planetary sliding bearing (50) to limit the rotation of the anti-rotation gasket (60) relative to the planetary sliding bearing (50).

5. The wireless passive temperature sensor (10) according to claim 4, wherein The transmitting end (112) of the rod body (11) is non-circular, the anti-rotation gasket (60) further includes an anti-rotation plate (63), the anti-rotation plate (63) is bent towards one side of the transmitting end (112) to form a non-circular space (64), the transmitting end (112) is located in the non-circular space (64) and abuts against the inner wall of the non-circular space (64).

6. The wireless passive temperature sensor (10) according to claim 5, wherein The transmitting end (112) of the rod body (11) is hexagonal, and the anti-rotation plate (63) includes four plates respectively abutting against four of the sides of the transmitting end (112).

7. The wireless passive temperature sensor (10) according to claim 4, wherein At the edge of the emitting end (112) of the rod body (11), a first toothed portion is provided, and at the edge of the anti-rotation plate (63), a second toothed portion is provided. The second toothed portion bends towards the emitting end (112) and is inserted into the tooth groove of the first toothed portion.

8. A wind power gearbox, characterized in that, Comprising: The wireless passive temperature sensor (10) according to any one of claims 1-7; A planetary shaft (70) and a planetary gear (80), the planetary gear (80) being sleeved outside the planetary shaft (70); Wherein, the outer wall of the planetary shaft (70) and the inner wall of the planetary gear (80) are in contact to form a planetary sliding bearing (50). The planetary sliding bearing (50) includes a mounting hole (51), and the mounting hole (51) extends from the axial end face (52) of the planetary sliding bearing (50) towards the axial midpoint of the planetary sliding bearing (50). The mounting hole (51) is located at the axial end face (52) of the planetary shaft (70) or the planetary gear (80).

9. The wind power gearbox (10) according to claim 8, characterized in that The extending direction of the mounting hole (51) is parallel to the axis of the planetary sliding bearing (50).

10. A wireless passive temperature measurement system based on radio frequency identification technology, characterized in that, Comprising: The wireless passive temperature sensor (10) according to any one of claims 1-7; A processor antenna (20), which is non-contact communicatively connected to the wireless passive temperature sensor (10) by radio frequency identification technology; A processor (30), which is electrically connected to the processor antenna (20); and A server (40), which is electrically or wirelessly connected to the processor (30).

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