Wireless power supply system and monitoring device for monitoring device of rotating parts of locomotive

Abstract

A wireless power supply system and monitoring device for a monitoring device of a rotating part of a locomotive, the wireless power supply system includes an energy transmitting module and an energy receiving module, the energy transmitting module includes a DC power supply, an inverter and a first LC oscillating circuit electrically connected in sequence, the energy receiving module includes a second LC oscillating circuit electrically connected in sequence, a rectifier and a load, the first LC oscillating circuit includes a first inductor, the second LC oscillating circuit includes a second inductor, the wireless power supply system also includes a first magnetic isolation material layer and a second magnetic isolation material layer, the first magnetic isolation material layer is arranged between a gear box and the first inductor, the second magnetic isolation material layer is arranged between a rotating shaft and the second inductor, the first coil of the first inductor is arranged on the first magnetic isolation material layer, the second coil of the second inductor is arranged on the second magnetic isolation material layer, and the first coil and the second coil are electromagnetically coupled. The wireless power supply system can realize stable and reliable energy supply for the monitoring device on the rotating part of the locomotive.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply, and in particular to a wireless power supply system of a monitoring device for a rotating part of a locomotive and a monitoring device having the same. Background Art

[0002] With the expansion of the application scope of EMUs, the vibration impact caused by higher operating speeds and heavier loads has an increasingly greater impact on the life of rotating parts. The differences in line and vehicle maintenance conditions have also increased the difficulty of calculation and evaluation methods. With the increase in the mileage of EMUs, changes in line conditions and the status of the vehicles themselves, the need to inspect and measure the operating status of rotating parts is becoming more and more urgent.

[0003] Monitoring devices are usually installed on key high-speed rotating parts of locomotives such as high-speed trains to monitor and analyze the health of rotating parts to ensure the safe operation of the locomotive. In the long-term operation of the monitoring device, an additional functional system is required for the monitoring device function. The existing functional systems mainly use wired collector ring power supply or wireless power supply to avoid wire entanglement caused by ordinary wired power supply.

[0004] (1) Wired collector ring power supply: The collector ring is an electrical component responsible for connecting the rotating body, transmitting energy and signals. It transmits electrical signals and energy between the fixed part and the rolling or sliding part through the sliding contact, electrostatic coupling or electromagnetic coupling of the conductive ring. The collector ring solution has mature collector ring technology and mature application experience; however, due to the constraints of the installation structure, the tested part needs to be installed and modified; at the same time, due to the difficulty of collector ring manufacturing, the number of test channels is small.

[0005] (2) Wireless power supply: Using the principle of electromagnetic induction or magnetic resonance, install the transmitting coil on the fixed part and the receiving induction coil on the rotating part. Wireless power supply requires less installation modification to the tested part, is less constrained by the installation structure, and is less difficult to manufacture. Ordinary wireless power supply based on the principle of electromagnetic induction can only work over a short distance. The fixed end and the rotating end of the locomotive are far apart, so it is suitable to use magnetic resonance wireless power supply. However, the existing magnetic resonance wireless function mode has a complex structure, high cost, and is easy to interfere with rotating parts, affecting the driving safety of the locomotive. Summary of the invention

[0006] In view of this, the present invention provides a wireless power supply system for a monitoring device of a locomotive rotating part and a monitoring device having the same, wherein the wireless power supply system can realize stable and reliable energy supply for the monitoring device on the locomotive rotating part.

[0007] A wireless power supply system for a monitoring device for a locomotive rotating component, wherein the locomotive rotating component comprises a gear box and a rotating shaft, wherein the rotating shaft is arranged on the gear box and can rotate around the gear box, wherein the wireless power supply system comprises an energy transmitting module and an energy receiving module, wherein the energy transmitting module comprises a DC power supply, an inverter and a first LC oscillation circuit which are electrically connected in sequence, wherein the energy receiving module comprises a second LC oscillation circuit, a rectifier and a load which are electrically connected in sequence, wherein the first LC oscillation circuit comprises a first inductor, and the second LC oscillation circuit comprises a second inductor, wherein the wireless power supply system further comprises a first magnetic isolation material layer and a second magnetic isolation material layer, wherein the first magnetic isolation material layer is arranged on the gear box, and the second magnetic isolation material layer is arranged on the rotating shaft, wherein a first coil of the first inductor is arranged on the first magnetic isolation material layer, and a second coil of the second inductor is arranged on the second magnetic isolation material layer, and the first coil and the second coil are arranged opposite to each other.

[0008] Furthermore, the first magnetic isolation material layer and the first coil are arranged on the end surface of the gear box facing the rotating shaft, and the second coil and the second magnetic isolation material layer are wound around the outer circumference of the rotating shaft.

[0009] Furthermore, the first coils are wound in the same plane and arranged in a planar spiral shape with the axis of the rotating shaft as the center.

[0010] Furthermore, the wireless power supply system also includes a base fixed on the gear box, the base includes a base portion and cover plates arranged on both sides of the base portion, the first coil is wound on the base portion in a planar spiral shape, and the first magnetic isolation material layer and the first coil are both sandwiched between the two cover plates.

[0011] Furthermore, the second coil is wound around the outer circumference of the rotating shaft and extends along the length direction of the rotating shaft.

[0012] Furthermore, the first LC oscillation circuit further includes a first capacitor, the second LC oscillation circuit further includes a second capacitor, and the product of the capacitance value of the first capacitor and the inductance value of the first inductor is equal to the product of the capacitance value of the second capacitor and the inductance value of the second inductor.

[0013] Furthermore, the first capacitor and the second capacitor are both adjustable capacitors, and the first inductor and the second inductor are both adjustable inductors.

[0014] Furthermore, the wireless power supply system also includes a box body, which is arranged on the gear box, and the inverter and the first capacitor of the first LC oscillation circuit are both arranged in the box body.

[0015] Furthermore, the wireless power supply system further includes a flexible circuit board, which is attached to the rotating shaft along the circumferential direction of the rotating shaft, and the rectifier and the second capacitor in the second LC oscillation circuit are formed on the flexible circuit board.

[0016] Furthermore, the magnetic permeability of the first magnetic isolation material layer and the second magnetic isolation material layer is 10H / m-300H / m.

[0017] The present invention also provides a monitoring device for a locomotive rotating component, and the monitoring device comprises the wireless power supply system of the above-mentioned monitoring device for a locomotive rotating component.

[0018] In summary, in this embodiment, by arranging a magnetic isolation material layer on the gearbox and the rotating shaft, and then arranging the first coil of the first inductor and the second coil of the second inductor on the corresponding magnetic isolation material layer, the interference of the hard magnetic material components of the locomotive rotating parts themselves on the electromagnetic conversion can be avoided, the energy conversion efficiency is improved, and the reliable power supply of the wireless power supply system is realized. Furthermore, by arranging the first coil in the first inductor on the end face of the gearbox facing the rotating shaft, on the one hand, the distance between the first inductor and the second inductor can be shortened, and on the other hand, the first coil in the first inductor can be prevented from interfering with the related components near the gearbox. Furthermore, by arranging the first coil in the first inductor in a planar spiral shape around the axis of the rotating shaft on the end face of the gearbox, the thickness of the first coil on the first inductor can be shortened, and the layout of the first inductor can be prevented from interfering with the rotating parts of the locomotive. The above-mentioned improvement can reduce the interference of the wireless function system on the rotating parts of the locomotive, and can realize stable and reliable power supply for the monitoring device on the rotating parts of the locomotive.

[0019] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shown is a system block diagram of a wireless power supply system for a locomotive rotating component monitoring device provided by an embodiment of the present invention.

[0021] Figure 2 Shown Figure 1 Schematic diagram of the circuit structure of the wireless power supply system.

[0022] Figure 3 It is a schematic diagram of the front view structure of the wireless power supply system of the monitoring device of the rotating component of a locomotive provided by an embodiment of the present invention installed on the rotating component.

[0023] Figure 4 Shown Figure 3 Schematic diagram of the test structure of the wireless power supply system of the rotating parts monitoring device of a locomotive installed on the rotating parts.

[0024] Figure 5 Shown is a structural schematic diagram of the winding method of the first coil on the first inductor. DETAILED DESCRIPTION

[0025] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description in conjunction with the accompanying drawings and preferred embodiments.

[0026] The present invention provides a wireless power supply system for a monitoring device of a locomotive rotating part and a monitoring device having the same. The wireless power supply system can realize stable and reliable energy supply for the monitoring device on the locomotive rotating part.

[0027] Figure 1 FIG. 1 is a system block diagram of a wireless power supply system for a monitoring device for a rotating component of a locomotive provided by an embodiment of the present invention. Figure 2 Shown Figure 1 Schematic diagram of the circuit structure of the wireless power supply system. Figure 3 The figure shows a schematic diagram of the front view of the structure of the wireless power supply system of the monitoring device for the rotating parts of a locomotive provided by an embodiment of the present invention installed on the rotating parts. Figure 4 Shown Figure 3 Schematic diagram of the test structure of the wireless power supply system of the rotating parts monitoring device of a locomotive installed on the rotating parts. Figures 1 to 4 As shown, the wireless power supply system of the locomotive rotating parts monitoring device provided in an embodiment of the present invention includes an energy transmitting module 10 and an energy receiving module 20, the energy transmitting module 10 includes a DC power supply 11, an inverter 12 and a first LC oscillation circuit 13 electrically connected in sequence, the energy receiving module 20 includes a second LC oscillation circuit 21, a rectifier 22 and a load 23 connected in sequence, and the first LC oscillation circuit 13 is electromagnetically coupled with the second LC oscillation circuit 21.

[0028] The DC power supply 11 in the energy transmitting module 10 converts DC power into high-frequency AC power through the inverter 12. After the high-frequency AC power enters the first LC oscillation circuit 13, the electrical energy of the AC power can be converted into electromagnetic wave energy and emitted. The second LC oscillation circuit 21 in the energy receiving module 20 can convert the energy of the electromagnetic wave into AC power again. After the AC power passes through the rectifier 22, it is converted again into DC power that can be used by the load 23, that is, the monitoring device, to complete the wireless transmission of energy.

[0029] In this embodiment, the first LC oscillating circuit 13 includes a first capacitor 131 and a first inductor 132 (eg, Figure 2 C f and L f ), the second LC oscillating circuit 21 includes a second capacitor 211 and a second inductor 212 (such as Figure 2 C s and L s ). Since there is a strong magnetic environment near the rotating part of the locomotive, it will cause great interference to the self-inductance strength of the energy transmitting module 10 and the energy receiving module 20, so the first LC oscillation circuit 13 and the second LC oscillation circuit need to adapt to each other. In order to ensure efficient energy transmission, in this embodiment, the product of the capacitance value of the first capacitor 131 and the inductance value of the first inductor 132 in the first LC oscillation circuit 13 is equal to the product of the capacitance value of the second capacitor 211 and the inductance value of the second inductor 212 in the second LC oscillation circuit 21, that is, L f *C f =L s *C s .

[0030] Furthermore, in order to adapt the first LC oscillating circuit 13 and the second LC oscillating circuit 21 to different environments, in this embodiment, the first capacitor 131 and the second capacitor 211 are both adjustable capacitors, and similarly, the first inductor 132 and the second inductor 212 are both adjustable inductors.

[0031] like Figure 3 and Figure 4As shown, in this embodiment, the locomotive rotating part includes a gear box 31 and a rotating shaft 32, the rotating shaft 32 is arranged on the gear box 31 and can rotate relative to the gear box 31, the DC power supply 11, the inverter 12 and the first LC oscillating circuit 13 are all arranged on the gear box 31 fixed to the locomotive, and the second LC oscillating circuit 21, the rectifier 22 and the load 23 are all arranged on the rotating shaft 32 of the locomotive rotating part. More specifically, the power supply system also includes a first magnetic isolation material layer 42 and a second magnetic isolation material layer 41, the first magnetic isolation material layer 42 is arranged on the gear box 31, the second magnetic isolation material layer 41 is arranged on the rotating shaft 32, the first coil 1321 in the first inductor 132 is arranged on the first magnetic isolation material layer 42, the second coil 2121 in the second inductor 212 is arranged on the second magnetic isolation material layer 41, and the first coil 1321 and the second coil 2121 are arranged opposite to each other. By setting the first magnetic isolation material layer 42 and the second magnetic isolation material layer 41, it is possible to prevent the electromagnetic wave energy converted from the electric energy from being absorbed by the hard magnetic materials such as the gear box 31 and the rotating shaft 32 on the locomotive rotating parts, and to make most of the electromagnetic wave energy converted by the first LC oscillation circuit 13 absorbed by the second LC oscillation circuit 21, thereby reducing the absorption of the electromagnetic field generated by the transmitting coil by the hard magnetic material components of the locomotive rotating parts themselves, improving the energy transfer efficiency, and realizing reliable energy supply of the wireless power supply system. In this embodiment, the magnetic permeability of the first magnetic isolation material layer 42 and the second magnetic isolation material layer 41 is 10H / m-300H / m.

[0032] More specifically, in this embodiment, the first coil 1321 and the first magnetic isolation material layer 42 in the first inductor 132 are arranged on the end surface of the gear box 31 facing the rotating shaft 32, and the second coil 2121 and the second magnetic isolation material layer 41 in the second inductor 212 are wound on the outer circumference of the rotating shaft 32. The first coil 1321 and the first magnetic isolation material layer 42 in the first inductor 132 are arranged on the end surface of the gear box 31 facing the rotating shaft 32, which can shorten the distance between the first inductor 132 and the second inductor 212 on the one hand, and prevent the first coil 1321 in the first inductor 132 from interfering with related components near the gear box 31 on the other hand.

[0033] Figure 5 FIG. 4 is a schematic diagram showing a first coil winding method on a first inductor. Figure 5 As shown, further, in this embodiment, the first coil 1321 on the first inductor 132 is wound in the same plane and arranged in a spiral line with the axis of the rotating shaft 32 as the center. This wiring method can shorten the thickness of the first coil 1321 on the first inductor 132 and prevent the hard magnetic material from absorbing the emitted electromagnetic field and causing energy loss.

[0034] See also Figures 3 to 5Further, in this embodiment, the energy transmitting module 10 further includes a base 33, the first coil 1321 on the first inductor 132 is wound on the base 33, the base 33 includes a base portion 331 and a cover plate 332 arranged on both sides of the base portion 331, and the first coil 1321 of the first inductor 132 is wound on the base portion 331 in a planar spiral shape (for ease of understanding, Figure 5 The base 33 in the figure omits the cover plate 332 on one side to show the arrangement of the first coil 1321 of the first inductor 132), the first magnetic isolation material layer 42 is arranged on the cover plate 332 on the side close to the gear box 31, and the first coil 1321 is arranged on the first magnetic isolation material layer 42, that is, the first magnetic isolation material layer 42 and the first coil are sandwiched between the two cover plates 332. The base 33 includes two arc plates 333, which are spliced ​​and sleeved outside the rotating shaft 32 and fixed on the gear box 31.

[0035] Furthermore, the energy transmitting module 10 further includes a box body 34 , which is fixed on the gear box 31 , and the inverter 12 and the first capacitor 131 in the first LC oscillation circuit 13 are both disposed in the box body 34 .

[0036] The second coil 2121 of the second inductor 212 is wound on the outer circumference of the rotating shaft 32 and extends along the length direction of the rotating shaft 32 to reduce the thickness of the rotating shaft 32 in the direction perpendicular to the axis. The energy receiving module 20 also includes a flexible circuit board 35, which is attached to the rotating shaft 32 along the circumferential direction of the rotating shaft 32. The rectifier 22 of the energy receiving module 20 and the second capacitor 211 in the second LC oscillating circuit 21 are both formed on the flexible circuit board 35.

[0037] In summary, in this embodiment, by setting a magnetic isolation material layer on the gear box 31 and the rotating shaft 32, and then setting the first coil 1321 of the first inductor 132 and the second coil 2121 in the second inductor 212 on the corresponding magnetic isolation material layer, this can reduce the absorption of the electromagnetic field generated by the transmitting coil of the components of the hard magnetic material of the locomotive rotating parts themselves, improve the energy conversion efficiency, and realize the reliable power supply of the wireless power supply system. Furthermore, by arranging the first coil 1321 in the first inductor 132 on the end face of the gear box 31 facing the rotating shaft 32, on the one hand, the distance between the first inductor 132 and the second inductor 212 can be shortened, and on the other hand, the first coil 1321 in the first inductor 132 can be prevented from interfering with the related components near the gear box 31. Furthermore, by arranging the first coil 1321 in the first inductor 132 in a plane spiral shape around the axis of the rotating shaft 32 on the end surface of the gear box 31, the thickness of the first coil 1321 on the first inductor 132 can be shortened, and the hard magnetic material absorbs the emitted electromagnetic field, causing energy loss. The above improvement can reduce the interference of the wireless function system on the rotating parts of the locomotive, and can realize stable and reliable energy supply to the monitoring device on the rotating parts of the locomotive.

[0038] The present invention also provides a locomotive rotating parts monitoring device, which includes the wireless power supply system of the locomotive rotating parts monitoring device mentioned above. For other technical features of the monitoring device, please refer to the prior art and will not be repeated here.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A wireless power supply system for a monitoring device of a locomotive rotating component, wherein the locomotive rotating component comprises a gear box and a rotating shaft fixed to the locomotive, wherein the rotating shaft is arranged on the gear box and can rotate around the axis of the rotating shaft, wherein: The wireless power supply system includes an energy transmitting module and an energy receiving module, the energy transmitting module includes a DC power supply, an inverter and a first LC oscillation circuit electrically connected in sequence, the energy receiving module includes a second LC oscillation circuit, a rectifier and a load electrically connected in sequence, the first LC oscillation circuit includes a first inductor, and the second LC oscillation circuit includes a second inductor. The wireless power supply system also includes a first magnetic isolation material layer and a second magnetic isolation material layer, the first magnetic isolation material layer is arranged between the gear box and the first inductor, the second magnetic isolation material layer is arranged between the rotating shaft and the second inductor, the first coil of the first inductor is arranged on the first magnetic isolation material layer, the second coil of the second inductor is arranged on the second magnetic isolation material layer, and the first coil and the second coil are electromagnetically coupled.

2. The wireless power supply system for a monitoring device for a locomotive rotating component according to claim 1, characterized in that: The first magnetic isolation material layer and the first coil are arranged on the end surface of the gear box facing the rotating shaft, and the second coil and the second magnetic isolation material layer are wound on the outer circumference of the rotating shaft.

3. The wireless power supply system of the locomotive rotating parts monitoring device according to claim 2, characterized in that: The first coils are wound in the same plane and arranged in a planar spiral shape with the axis of the rotating shaft as the center.

4. The wireless power supply system for a monitoring device for a locomotive rotating component as claimed in claim 2, characterized in that: The wireless power supply system also includes a base fixed on the gear box, the base includes a base portion and cover plates arranged on both sides of the base portion, the first coil is wound on the base portion in a planar spiral shape, and the first magnetic isolation material layer and the first coil are both sandwiched between the two cover plates.

5. The wireless power supply system for a monitoring device for a locomotive rotating component as claimed in claim 2, characterized in that: The second coil is wound on the outer circumference of the rotating shaft and extends along the length direction of the rotating shaft.

6. The wireless power supply system for a monitoring device for a locomotive rotating component according to claim 1, characterized in that: The first LC oscillation circuit further includes a first capacitor, and the second LC oscillation circuit further includes a second capacitor, and the product of the capacitance value of the first capacitor and the inductance value of the first inductor is equal to the product of the capacitance value of the second capacitor and the inductance value of the second inductor.

7. The wireless power supply system of the locomotive rotating parts monitoring device according to claim 6, characterized in that: The first capacitor and the second capacitor are both adjustable capacitors, and the first inductor and the second inductor are both adjustable inductors.

8. The wireless power supply system for a monitoring device for a locomotive rotating component as claimed in claim 6, characterized in that: The wireless power supply system further includes a box body, which is disposed on the gear box, and the inverter and the first capacitor of the first LC oscillation circuit are both disposed in the box body.

9. The wireless power supply system for a monitoring device for a locomotive rotating component according to claim 7, characterized in that: The wireless power supply system further includes a flexible circuit board, which is attached to the rotating shaft along the circumferential direction of the rotating shaft, and the rectifier and the second capacitor in the second LC oscillation circuit are formed on the flexible circuit board.

10. The wireless power supply system of the locomotive rotating parts monitoring device according to claim 1, characterized in that: The magnetic permeability of the first magnetic isolation material layer and the second magnetic isolation material layer is 10H / m-300H / m.

11. A monitoring device for a locomotive rotating part, characterized in that: A wireless power supply system comprising a locomotive rotating component monitoring device as described in any one of claims 1 to 10.

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