An eddy current damping device with heat dissipation capability

Abstract

The application provides an eddy current damping device with heat dissipation capacity, comprising a rotating shaft, a shell sleeved outside the rotating shaft, a magnetic steel assembly arranged on the rotating shaft, and a conductor arranged on the shell, and further comprising a main heat dissipation channel communicated with external air and an auxiliary heat dissipation channel communicated with the main heat dissipation channel, wherein the main heat dissipation channel penetrates the axial direction of the magnetic steel assembly and the radial direction of the conductor in sequence; the auxiliary heat dissipation channel comprises a radial flow section and an axial flow section communicated with each other, the radial flow section penetrates the magnetic steel assembly, and the axial flow section is arranged between the magnetic steel assembly and the conductor. The application has the advantages of good cooling and heat dissipation effect, and avoidance of eddy current damping recession or failure.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation in damping devices, and more particularly to an eddy current damping device with heat dissipation capability. Background Technology

[0002] Damping devices are commonly used for vibration reduction, braking, and providing test loads. Currently, existing damping devices generally come in two forms: 1. Friction damping devices, which rely on the frictional resistance generated when two moving surfaces come into contact to achieve braking or load provision. However, they suffer from the problem of easily worn moving parts requiring periodic replacement. 2. Eddy current damping devices, which rely on the resistance generated by a conductor moving in a magnetic field provided by a permanent magnet. When a conductor in a magnetic field cuts magnetic lines of force, eddy currents are generated within the conductor. These eddy currents produce a new magnetic field opposite in direction to the original magnetic field, thus creating resistance between the original magnetic field and the conductor, hindering their relative motion. Simultaneously, the conductor's resistance converts its kinetic energy into heat energy through the eddy currents. Compared to friction damping devices, eddy current damping devices offer advantages such as high reliability, good durability, and simple construction, making them suitable for working environments requiring long fatigue life and difficult maintenance.

[0003] Existing eddy current damping devices suffer from thermal decay and partial or complete demagnetization of the permanent magnet component when the temperature rises too high. This leads to damping degradation or failure, rendering the device ineffective for vibration reduction, braking, or load provision. To address this issue, existing eddy current damping devices typically employ forced air cooling and forced liquid cooling. Since the heat source is a conductor, current cooling methods directly target this conductor. However, some heat generated by the conductor is transferred to the magnet component through the air gap. Therefore, even with cooling of the conductor, the magnet component's temperature still rises. If the magnet component exceeds its tolerance temperature, demagnetization occurs. Thus, existing cooling structures still cannot guarantee the vibration reduction, braking, or load provision effects of the eddy current damping device. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an eddy current damping device with heat dissipation capability that has good cooling and heat dissipation effect and avoids the phenomenon of eddy current damping decay or failure.

[0005] To solve the above-mentioned technical problems, the technical solution proposed by this invention is as follows:

[0006] An eddy current damping device with heat dissipation capability includes a rotating shaft, a housing sleeved outside the rotating shaft, a magnet assembly disposed on the rotating shaft, and a conductor disposed on the housing. It also includes a main heat dissipation channel communicating with external air and an auxiliary heat dissipation channel communicating with the main heat dissipation channel. The main heat dissipation channel sequentially passes through the axial direction of the magnet assembly and the radial direction of the conductor. The auxiliary heat dissipation channel includes a radial flow section and an axial flow section that communicate with each other. The radial flow section passes through the magnet assembly, and the axial flow section is located between the magnet assembly and the conductor.

[0007] As a further improvement to the above technical solution:

[0008] The magnet assembly includes a magnet mounting plate fitted onto the rotating shaft, and magnet blocks spaced apart along the outer periphery of the magnet mounting plate; the main heat dissipation channel includes an air inlet, an axial ventilation hole, and an air outlet connected in sequence, the axial ventilation hole being disposed through the magnet mounting plate, the air inlet being disposed on the end face of the outer shell, and the air outlet being disposed on the shell of the outer shell and the conductor; the radial flow passage is a radial through hole disposed on the magnet mounting plate and the magnet blocks; the axial flow passage is a flow gap disposed between the magnet blocks and the conductor.

[0009] There are at least two magnet assemblies, which are arranged axially along the rotating shaft; the axial ventilation holes are provided through each magnet assembly; and the air outlets are provided between adjacent magnet assemblies.

[0010] The air inlet is arranged opposite to the axial ventilation hole, and the air inlet is a plurality of air inlets spaced apart along the outer circumference of the rotating shaft; the air outlet is a plurality of air outlets spaced apart along the circumference of the outer shell.

[0011] The eddy current damping device with heat dissipation capability also includes heat dissipation blades, which are disposed in the main heat dissipation channel and arranged along the axis of the rotating shaft; the included angle θ between the heat dissipation blades and the radial plane of the rotating shaft passing through the middle of the heat dissipation blades satisfies 0°≤θ<90°.

[0012] The magnet assembly includes a magnet mounting plate fitted onto the rotating shaft. The magnet mounting plate has mounting plate end caps with ventilation mounting ports at both ends, and the heat dissipation blades are installed inside the ventilation mounting ports.

[0013] There are multiple heat dissipation blades, which are arranged at circumferential intervals along the rotating shaft; the number of ventilation ports is the same as the number of heat dissipation blades, and the two are set in a one-to-one correspondence.

[0014] The ventilation port is a fan-shaped port, and the heat dissipation blades are installed diagonally opposite the fan-shaped port.

[0015] There are at least two magnet assemblies, which are arranged axially along the rotating shaft and fixedly connected by the same heat dissipation blade.

[0016] The outer surface of the housing is provided with heat dissipation fins arranged at intervals along the circumference of the housing, and the air outlet of the main heat dissipation channel is staggered from the heat dissipation fins.

[0017] Compared with the prior art, the advantages of the present invention are as follows:

[0018] This invention features a main heat dissipation channel and an auxiliary heat dissipation channel that are interconnected. The main heat dissipation channel is connected to the external air, allowing external air to enter and exchange heat with the auxiliary heat dissipation channel before being discharged. This ensures reliable cooling and dissipation of heat inside the damping device. Simultaneously, the main heat dissipation channel is sequentially located along the axial direction of the magnet assembly and the radial direction of the conductor, allowing external air to exchange heat with the magnet assembly and conductor sequentially. The auxiliary heat dissipation channel includes a radial flow section and an axial flow section that are interconnected. The radial flow section passes through the magnet assembly, and the axial flow section is located between the magnet assembly and the conductor. This allows a portion of the air entering the main heat dissipation channel to dissipate heat from the magnet assembly through the radial flow section. The air then enters the axial flow section and, under the structural constraints of the axial flow section, is discharged towards the outlet. At this point, the air passes over the inner surface of the conductor, increasing the turbulence intensity at the conductor and thus enhancing the air's heat exchange capacity with the conductor.

[0019] As can be seen, while enhancing the cooling of the conductor by using forced air cooling, the present invention achieves direct cooling of the magnet assembly through the setting of heat dissipation channels. At this time, both the conductor that generates heat and the magnet assembly that loses magnetism are cooling targets. Both the main heat dissipation channel and the auxiliary heat dissipation channel cool and exchange heat for the conductor and the magnet assembly. This greatly improves the heat dissipation capacity of the forced air-cooled eddy current damping device, avoids the problem of eddy current damping decay or failure, and ensures the damping device's vibration reduction, braking, or load-providing effects.

[0020] Furthermore, the main heat dissipation channel is equipped with heat dissipation blades, which are arranged along the axial direction of the rotating shaft. The angle θ between the heat dissipation blades and the radial plane passing through the center of the blades satisfies 0°≤θ<90°. At this time, the heat dissipation blades rotate under the drive of the rotating shaft, acting as fans. This enhances the airflow inside the damping device, thereby drawing some air through the main heat dissipation channel, enhancing forced heat exchange between the air and the conductor components and magnet assembly, and further improving the device's heat dissipation capacity. Simultaneously, the heat dissipation blades only need to be installed within the main heat dissipation channel, eliminating the need for additional space for components that improve airflow (such as fans). This simplifies the structure and reduces space occupation while improving heat dissipation efficiency. Attached Figure Description

[0021] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the eddy current damping device of the present invention;

[0023] Figure 2 This is a three-dimensional structural schematic diagram of the eddy current damping device of the present invention (the outer casing end cap is not shown);

[0024] Figure 3 This is a three-dimensional structural schematic diagram of the eddy current damping device of the present invention (outer shell not shown);

[0025] Figure 4 This is a front view of the eddy current damping device of the present invention;

[0026] Figure 5 yes Figure 4 A sectional view of section AA; Figure 6 yes Figure 5 A sectional view of section BB.

[0027] The labels in the diagram represent:

[0028] 1. Shaft; 2. Housing; 21. Housing end cap; 22. Housing; 3. Magnet assembly; 31. Magnet mounting plate; 311. Mounting plate end cap; 312. Ventilation mounting port; 32. Magnet block; 4. Conductor; 5. Main heat dissipation channel; 51. Air inlet; 52. Axial ventilation hole; 53. Air outlet; 6. Auxiliary heat dissipation channel; 61. Radial flow section; 62. Axial flow section; 7. Heat dissipation blades; 8. Heat dissipation fins. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of protection of the present invention.

[0030] Figures 1 to 6An embodiment of the eddy current damping device with heat dissipation capability of the present invention is shown, which can be used for vibration reduction, braking, or providing test loads for rotating equipment, such as gear shafts. In this embodiment, the eddy current damping device includes a rotating shaft 1, a housing 2, a magnet assembly 3, a conductor 4, a main heat dissipation channel 5, and an auxiliary heat dissipation channel 6. The input end of the rotating shaft 1 is connected to an external device to apply eddy current damping force to the device; the housing 2 is fitted over the rotating shaft 1 and fixedly installed; the magnet assembly 3 is located on the rotating shaft 1 and rotates synchronously with the rotating shaft 1; the conductor 4 is located on the housing 2, and the conductor 4 moves relative to the magnet assembly 3 when the rotating shaft 1 rotates to generate eddy current damping force. Simultaneously, the main heat dissipation channel 5 is connected to external air, and the auxiliary heat dissipation channel 6 is connected to the main heat dissipation channel 5, allowing external air to enter the main heat dissipation channel 5 and the auxiliary heat dissipation channel 6 for heat exchange and then discharge after heat exchange, ensuring reliable cooling and dissipation of heat inside the damping device.

[0031] In this embodiment, the main heat dissipation channel 5 is sequentially connected to the axial direction of the magnet assembly 3 and the radial direction of the conductor 4, allowing external air to exchange heat through the magnet assembly 3 and the conductor 4 in sequence. The auxiliary heat dissipation channel 6 includes a radial flow section 61 and an axial flow section 62 that are interconnected. The radial flow section 61 passes through the magnet assembly 3, and the axial flow section 62 is located between the magnet assembly 3 and the conductor 4. This allows a portion of the air entering the main heat dissipation channel 5 to dissipate heat from the magnet assembly 3 through the radial flow section 61. Afterward, the air passing through the radial flow section 61 enters the axial flow section 62 and is discharged towards the air outlet 53 under the structural constraints of the axial flow section 62. At this time, the air passes through the inner surface of the conductor 4, which increases the turbulence intensity at the conductor 4, thereby enhancing the air's ability to exchange heat with the conductor 4.

[0032] As can be seen, while enhancing the cooling of the conductor 4 by using forced air cooling, the present invention achieves direct cooling of the magnet assembly 3 through the setting of heat dissipation channels. At this time, both the conductor 4, which generates heat, and the magnet assembly 3, which loses magnetism, are cooling targets. Both the main heat dissipation channel 5 and the auxiliary heat dissipation channel 6 cool and exchange heat for the conductor 4 and the magnet assembly 3. This greatly improves the heat dissipation capacity of the forced air-cooled eddy current damping device, avoids the problem of eddy current damping decay or failure, and ensures the damping device's vibration reduction, braking, or load-providing effects.

[0033] like Figure 3 and Figure 5As shown, the magnet assembly 3 includes a magnet mounting plate 31 and magnet blocks 32. The magnet mounting plate 31 is fitted onto the rotating shaft 1 and rotates synchronously with the rotating shaft 1; there are multiple magnet blocks 32, which are arranged at intervals along the outer periphery of the magnet mounting plate 31; the conductor 4 is a conductor cylinder fitted outside the magnet blocks 32. The conductor 4 and the magnet blocks 32 move relative to each other when the rotating shaft 1 rotates, generating eddy current damping force. In this embodiment, the main heat dissipation channel 5 includes an air inlet 51, an axial ventilation hole 52, and an air outlet 53 connected in sequence. The axial ventilation hole 52 is provided through the magnet mounting plate 31, the air inlet 51 is provided on the end face of the outer shell 2, and the air outlet 53 is provided on the shell 22 of the outer shell 2 and the conductor 4. This forms a heat dissipation channel that connects the magnet mounting plate 31 and the conductor 4, ensuring that both the magnet mounting plate 31 and the conductor 4 can be effectively cooled and dissipated, and its structure is simple and compact.

[0034] Meanwhile, the radial flow section 61 is a radial through hole, which is provided on the magnet mounting plate 31 and the magnet block 32 for cooling and heat dissipation. The axial flow section 62 is a flow gap, which is provided between the magnet block 32 and the conductor 4. At this time, air passes through the inner surface of the conductor 4, which increases the turbulence intensity at the conductor 4, thereby enhancing the heat exchange capacity of the air to the conductor 4.

[0035] In this embodiment, the magnet assembly 3 is configured in two groups, arranged axially along the rotating shaft 1. Axial ventilation holes 52 pass through the two groups of magnet assemblies 3 to cool and dissipate heat. Simultaneously, an air outlet 53 is provided between the two groups of magnet assemblies 3 to cool and dissipate heat to the conductor 4, and the layout is compact. In other embodiments, the number of magnet assemblies 3 can be adjusted according to requirements, such as one, three, or four groups. When multiple groups of magnet assemblies 3 are configured, an air outlet 53 is provided between adjacent magnet assemblies 3 to ensure effective exhaust of dissipated air and guarantee the heat dissipation effect.

[0036] Furthermore, the air inlet 51 is arranged opposite to the axial ventilation hole 52 to ensure that external air quickly enters the axial ventilation hole 52 and effectively dissipates heat from the magnet mounting plate 31. Figure 1 and Figure 4 As shown, the air inlets 51 are multiple air inlets 51 spaced apart along the outer circumference of the rotating shaft 1. The air inlets 51 are arc-shaped to ensure that external air can fully and evenly enter the magnet mounting plate 31 for heat dissipation. Simultaneously, there are multiple air outlets 53, which are spaced apart along the circumference of the outer casing 2 to ensure that the heat-exchanged air is fully discharged. In other embodiments, the position and form of the air inlets 51 and air outlets 53 can be determined as long as they ensure effective entry and exit of external air. For example, the air inlets 51 can be circular, and the air outlets 53 can be arc-shaped.

[0037] like Figure 5 As shown, both ends of the outer casing 2 have air inlets 51 on their end caps 21. In other embodiments, the air inlets 51 need only be able to ensure that external air can effectively enter the magnet mounting plate 31; for example, an air inlet 51 may only be provided at one end of the outer casing 2.

[0038] Preferably, such as Figure 3 , Figure 5 and Figure 6 As shown, the eddy current damping device also includes heat dissipation blades 7, which are disposed within the main heat dissipation channel 5 and arranged axially along the rotating shaft 1. The angle θ between the heat dissipation blades 7 and the radial plane passing through the center of the rotating shaft 1 satisfies 0°≤θ<90°. At this time, the heat dissipation blades 7 rotate under the drive of the rotating shaft 1, acting as a fan. This enhances the airflow inside the damping device, thereby driving some air through the main heat dissipation channel 5, enhancing the forced heat exchange between the air and the conductor 4 and the magnet assembly 3, further improving the device's heat dissipation capacity. Simultaneously, the heat dissipation blades 7 only need to be disposed within the main heat dissipation channel 5, eliminating the need for additional space for components that improve airflow (such as fans). This simplifies the structure and reduces space occupation while improving heat dissipation.

[0039] More preferably, the magnet mounting plate 31 has mounting plate end caps 311 with ventilation mounting ports 312 at both ends, and the heat dissipation blades 7 are installed in the ventilation mounting ports 312, which makes the heat dissipation blades 7 securely and effectively installed, and ensures effective air passage.

[0040] In this embodiment, there are six heat dissipation blades 7, which are arranged at circumferential intervals along the rotating shaft 1. The number of ventilation mounting ports 312 is the same as the number of heat dissipation blades 7, and the heat dissipation blades 7 are installed in the corresponding ventilation mounting ports 312. The installation structure is simple, compact, and low in cost. In other embodiments, the number of heat dissipation blades 7 can be set according to the actual situation, such as three, four, etc.

[0041] In this embodiment, the ventilation mounting port 312 is a fan-shaped mounting port, and the heat dissipation blades 7 are installed diagonally opposite the fan-shaped mounting port. In other embodiments, any structure that ensures effective air passage and effective installation of the heat dissipation blades 7 should be within the protection scope of this invention. For example, the ventilation mounting port 312 can also be set as an arc-shaped mounting port, etc.

[0042] In this embodiment, the two sets of magnet assemblies 3 are fixedly connected by the same heat dissipation blade 7, so that the two sets of magnet assemblies 3 are connected into a whole, forming a more stable and reliable structure. In other embodiments, the two sets of magnet assemblies 3 may also be provided with heat dissipation blades 7 separately.

[0043] Furthermore, the outer surface of the outer casing 2 is provided with heat dissipation fins 8, which are arranged at intervals along the circumference of the outer casing 2. The air outlet 53 of the main heat dissipation channel 5 is staggered from the heat dissipation fins 8. The arrangement of the heat dissipation fins 8 allows some of the heat generated by the conductor 4 to be dissipated into the air through the heat dissipation fins 8, which further improves the heat dissipation effect of the damping device.

[0044] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An eddy current damping device with heat dissipation capability, comprising a rotating shaft, a housing sleeved outside the rotating shaft, a magnet assembly disposed on the rotating shaft, and a conductor disposed on the housing, characterized in that, It also includes a main heat dissipation channel connecting to the outside air and an auxiliary heat dissipation channel connecting to the main heat dissipation channel. The main heat dissipation channel sequentially passes through the axial direction of the magnet assembly and the radial direction of the conductor. The auxiliary heat dissipation channel includes a radial flow section and an axial flow section that are interconnected. The radial flow section passes through the magnet assembly, and the axial flow section is located between the magnet assembly and the conductor. The magnet assembly includes a magnet mounting plate fitted onto the rotating shaft and magnet blocks spaced apart along the outer periphery of the magnet mounting plate. The main heat dissipation channel includes sequentially connected... The device includes an air inlet, an axial ventilation hole, and an air outlet. The axial ventilation hole extends through the magnet mounting plate. The air inlet is located on the end face of the housing. The air outlet is located on the housing shell and the conductor. The radial flow passage is a radial through hole located on the magnet mounting plate and the magnet block. The axial flow passage is a flow gap located between the magnet block and the conductor. There are at least two magnet assemblies, which are arranged axially along the rotating shaft. The axial ventilation hole passes through each magnet assembly. The air outlet is located between adjacent magnet assemblies.

2. The eddy current damping device with heat dissipation capability according to claim 1, characterized in that, The air inlet is arranged opposite to the axial ventilation hole, and the air inlet is a plurality of air inlets spaced apart along the outer circumference of the rotating shaft; the air outlet is a plurality of air outlets spaced apart along the circumference of the outer shell.

3. The eddy current damping device with heat dissipation capability according to claim 1 or 2, characterized in that, It also includes heat dissipation blades, which are disposed in the main heat dissipation channel and arranged along the axis of the rotating shaft; the included angle θ between the heat dissipation blades and the radial plane of the rotating shaft passing through the middle of the heat dissipation blades satisfies 0°≤θ<90°.

4. The eddy current damping device with heat dissipation capability according to claim 3, characterized in that, The magnet assembly includes a magnet mounting plate fitted onto the rotating shaft. The magnet mounting plate has mounting plate end caps with ventilation mounting ports at both ends, and the heat dissipation blades are installed inside the ventilation mounting ports.

5. The eddy current damping device with heat dissipation capability according to claim 4, characterized in that, There are multiple heat dissipation blades, which are arranged at circumferential intervals along the rotating shaft; the number of ventilation ports is the same as the number of heat dissipation blades, and the two are set in a one-to-one correspondence.

6. The eddy current damping device with heat dissipation capability according to claim 5, characterized in that, The ventilation port is a fan-shaped port, and the heat dissipation blades are installed diagonally opposite the fan-shaped port.

7. The eddy current damping device with heat dissipation capability according to claim 3, characterized in that, There are at least two magnet assemblies, which are arranged axially along the rotating shaft and fixedly connected by the same heat dissipation blade.

8. The eddy current damping device with heat dissipation capability according to claim 1 or 2, characterized in that, The outer surface of the housing is provided with heat dissipation fins arranged at intervals along the circumference of the housing, and the air outlet of the main heat dissipation channel is staggered from the heat dissipation fins.

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