Flywheel rotor heat dissipation mechanism

Abstract

The present application discloses a heat dissipation mechanism for a flywheel rotor, comprising a rotor and a cooling trough. The rotor is configured to rotate about a rotation axis during operation, and a cooling channel is provided along the rotation axis. The cooling trough is configured to contain coolant and is disposed at an end of the rotor along the length of the rotation axis and communicates with the cooling channel. The cooling trough includes a flow channel screw embedded in the cooling channel. Through the above-described method, the present application can achieve rapid heat dissipation of the flywheel rotor, avoid the use of an external liquid pump system, reduce the difficulty and complexity of the system structure design, and reduce production costs.

Description

Technical Field

[0001] The present application relates to the technical field of flywheel energy storage, and in particular to a heat dissipation mechanism of a flywheel rotor. Background Art

[0002] Flywheel energy storage systems operate under the special conditions of high vacuum. Since the heat generated by the flywheel rotor cannot be dissipated through convection heat transfer through the air medium, it can only rely on the rotor's own radiation or other special methods to dissipate heat. The existing flywheel rotor cooling method generally uses oil cooling in the shaft hole. However, the cooling method of oil cooling in the shaft hole requires an external liquid pump for liquid cooling circulation, which increases the difficulty and complexity of the system structure design, and the newly added liquid pump equipment will bring greater costs. Summary of the Invention

[0003] The present application mainly provides a heat dissipation mechanism for a flywheel rotor to solve the problems of high difficulty and high cost in the system structure design of the flywheel rotor cooling method in the prior art.

[0004] To solve the above technical problems, a technical solution adopted in the present application is: to provide a heat dissipation mechanism for a flywheel rotor, the heat dissipation mechanism comprising: a rotor, configured to rotate about a rotation axis during operation, the rotor being provided with a cooling channel along the rotation axis; a cooling groove, configured to contain a coolant, being provided at an end portion of the rotor along the length direction of the rotation axis and being connected to the cooling channel, the cooling groove comprising a flow channel screw, the flow channel screw being embedded in the cooling channel; wherein, when the rotor rotates about the rotation axis, the cooling channel and the flow channel screw rotate relative to each other, thereby driving the coolant along the flow channel screw from the cooling groove into the cooling channel to dissipate heat for the rotor, and the coolant flows back from the cooling channel into the cooling groove under the action of gravity; or the coolant enters the cooling channel under the action of gravity to dissipate heat for the rotor, and when the rotor rotates about the rotation axis, the cooling channel and the flow channel screw rotate relative to each other, thereby driving the coolant along the flow channel screw from the cooling channel into the cooling groove.

[0005] According to an embodiment provided in the present application, there are two cooling channels, which are respectively arranged at both ends of the rotor along the length direction of the rotating shaft. There are two cooling grooves, and the two cooling grooves are respectively arranged corresponding to the two cooling channels.

[0006] According to one embodiment provided in the present application, the rotor further includes a return channel and a connecting channel. The return channel surrounds the cooling channel and is spaced apart from the cooling channel. The connecting channel is arranged at the end of the cooling channel away from the cooling groove, and is used to connect the cooling channel with one end of the return channel, and the other end of the return channel is connected to the cooling groove.

[0007] According to one embodiment provided in the present application, the reflux channel includes a plurality of sub-channels, and the plurality of sub-channels are arranged at intervals around the cooling channel.

[0008] According to an embodiment provided in the present application, the heat dissipation mechanism further includes a shell, and the rotor and the cooling groove are arranged in the shell.

[0009] According to one embodiment provided in the present application, the heat dissipation mechanism further includes an external cooling component, which is disposed on the shell for performing heat exchange with the cooling tank.

[0010] According to one embodiment provided in the present application, the external cooling component includes one or more of a liquid cooling system, a heat pipe system, and an air cooling system.

[0011] According to an embodiment provided in the present application, the heat dissipation mechanism further includes a motor stator, which is disposed in the housing and sleeved on the rotor to cooperate with the rotor to drive the rotor to rotate around the rotation axis.

[0012] According to an embodiment provided in the present application, the heat dissipation mechanism further includes a magnetic bearing stator, which is disposed in the housing and is used to suspend the rotor relative to the magnetic bearing stator.

[0013] According to an embodiment provided in the present application, there are two magnetic bearing stators, and the two magnetic bearing stators are respectively arranged on both sides of the motor stator along the length direction of the rotating shaft.

[0014] The beneficial effects of the present application are: different from the prior art, the present application sets a cooling channel in the rotor, and then sets a cooling groove connected to the cooling channel at the end of the rotor, and sets a flow channel screw in the cooling groove and embeds it into the cooling channel, so that the rotation of the rotor can be used to make the cooling channel and the flow channel screw rotate relative to each other, so that the coolant in the cooling groove can flow into or out of the cooling channel, and flow out or into the cooling channel under the action of gravity, so that the coolant flows back and forth between the cooling channels and continuously takes away the heat of the rotor, thereby realizing rapid heat dissipation of the flywheel rotor, and the above design can avoid the use of an external liquid pump system, reduce the difficulty and complexity of the system structure design, and thus reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0016] Figure 1 This is a schematic structural diagram of a first embodiment of a heat dissipation mechanism for a flywheel rotor provided in this application;

[0017] Figure 2 yes Figure 1 A schematic structural diagram of an embodiment of a cooling slot in a heat dissipation mechanism of a flywheel rotor is shown;

[0018] Figure 3 yes Figure 1 A schematic structural diagram of a local area A of the heat dissipation mechanism of the flywheel rotor shown;

[0019] Figure 4 This is a schematic structural diagram of a second embodiment of the heat dissipation mechanism for a flywheel rotor provided in this application;

[0020] Figure 5 yes Figure 4 A schematic structural diagram of a local area B of the heat dissipation mechanism of the flywheel rotor is shown;

[0021] Figure 6 yes Figure 4 A schematic top view of the return channel in the heat dissipation mechanism of the flywheel rotor is shown. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0023] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0025] See also Figures 1-6 The present application provides a heat dissipation mechanism 10 for a flywheel rotor. The heat dissipation mechanism 10 includes a rotor 100 and a cooling tank 200 .

[0026] The rotor 100 is configured to rotate about a rotation axis during operation, and a cooling channel 110 is provided along the rotation axis. The cooling groove 200 is configured to accommodate coolant. The cooling groove 200 is provided at an end of the rotor 100 along the length of the rotation axis and communicates with the cooling channel 110, allowing the coolant to flow back and forth between the cooling channel 110 and the cooling groove 200.

[0027] like Figure 1 、 Figure 2 as well as Figure 3 As shown, the cooling tank 200 includes a flow channel screw 210 . Specifically, the flow channel screw 210 is disposed on the bottom surface of the cooling tank 200 and embedded in the cooling channel 110 .

[0028] In a specific scenario, when the rotor 100 rotates around the rotation axis during operation, the cooling channel 110 and the flow channel screw 210 rotate relative to each other, thereby driving the coolant along the flow channel screw 210 from the cooling groove 200 into the cooling channel 110 to dissipate heat from the rotor 100. Specifically, a threaded flow channel is provided on the surface of the flow channel screw 210. When the cooling channel 110 and the flow channel screw 210 rotate relative to each other, based on the centrifugal effect and the effect of fluid dynamics, the flow channel screw 210 and the inner wall of the cooling channel 110 form a flow channel space, thereby driving the coolant in the cooling groove 200 to enter the cooling channel 110 along the flow channel space, thereby contacting the rotor 100, and then dissipating heat from the rotor 100. Subsequently, the coolant flows back from the cooling channel 110 into the cooling groove 200 under the action of gravity, thereby completing a cycle. During the rotation of the rotor 100 , the coolant circulates from the cooling tank 200 into the cooling channel 110 and flows out of the cooling channel 110 into the cooling tank 200 , thereby taking away the heat of the rotor 100 to achieve the effect of dissipating heat from the rotor 100 .

[0029] In another specific scenario, the coolant enters the cooling channel 110 under the action of gravity to dissipate heat from the rotor 100. When the rotor 100 rotates around the rotation axis, the cooling channel 110 and the runner screw 210 rotate relative to each other, thereby driving the coolant along the runner screw 210 from the cooling channel 110 into the cooling tank 200. Specifically, the runner screw 210 in this scenario has a similar structure to the runner screw 210 in the above scenario, but the rotation direction of the threaded runner provided on the surface of the runner screw 210 is different, thereby ensuring that the coolant can enter the cooling channel 110 or the cooling tank 200 along the threaded runner.

[0030] In a specific embodiment, the coolant may be water or other flowing liquid with good heat dissipation properties.

[0031] In the above embodiment, a cooling channel 110 is provided within the rotor 100, a cooling groove 200 connected to the cooling channel 110 is provided at the end of the rotor 100, and a flow channel screw 210 is provided in the cooling groove 200 and embedded in the cooling channel 110. Thus, the rotation of the rotor 100 can be used to cause the cooling channel 110 and the flow channel screw 210 to rotate relative to each other, allowing the coolant in the cooling groove 200 to flow into or out of the cooling channel 110, and to flow out or into the cooling channel 110 under the action of gravity. The coolant flows back and forth between the cooling channels 110 and the cooling channels 110, continuously removing heat from the rotor 100, thereby achieving heat dissipation from the rotor 100.

[0032] Relatively speaking, using coolant provides superior heat dissipation compared to conventional cooling gas. Furthermore, because this application utilizes the rotation of the rotor 100 and gravity to circulate the coolant between the cooling grooves 200 and the cooling channels 110, the structure is simple and effective. Compared to the prior art method of injecting coolant into the rotor 100 via an external water pump, this significantly reduces the complexity of the overall system structure and lowers costs. Furthermore, the vacuum environment in which the heat dissipation mechanism 10 is used can be ignored, achieving internal circulation heat dissipation.

[0033] In a specific embodiment, there can be two cooling channels 110, which are disposed at both ends of the rotor 100 along the longitudinal direction of the rotating shaft, and the two cooling channels 110 are not connected to each other. Correspondingly, there are also two cooling slots 200, and the two cooling slots 200 are disposed corresponding to the two cooling channels 110.

[0034] In a specific application scenario, the rotation axis of the rotor 100 coincides with the direction of gravity or is set at a small angle. The cooling channel 110 located below the rotor 100 can absorb the coolant in the cooling tank 200 by rotating relative to the flow channel screw 210, and the coolant is allowed to flow back into the cooling tank 200 under the action of gravity. The cooling channel 110 located above the rotor 100 can obtain the coolant in the cooling tank 200 by gravity, and discharge the coolant into the cooling tank 200 by rotating relative to the flow channel screw 210, thereby achieving heat dissipation for the rotor 100. The above design can avoid the use of an external liquid pump system, reduce the difficulty and complexity of the system structure design, and thus reduce production costs.

[0035] like Figure 4 and Figure 5 As shown, the rotor 100 also includes a return channel 120 and a connecting channel 130. The return channel 120 is arranged around the cooling channel 110 and is spaced apart from the cooling channel 110. The connecting channel 130 is arranged at the end of the cooling channel 110 away from the cooling groove 200, and is used to connect the cooling channel 110 with one end of the return channel 120, and the other end of the return channel 120 is connected to the cooling groove 200.

[0036] In a specific scenario, if the coolant enters the cooling channel 110 through relative rotation between the cooling channel 110 and the flow channel screw 210, the coolant will enter the connecting channel 130 and the return channel 120 in turn under the action of inertia, and flow from the return channel 120 into the cooling tank 200 under the action of gravity, thus completing a cycle.

[0037] In another specific scenario, if the coolant enters the cooling channel 110 by gravity. In a specific embodiment, the cooling channel 110 and the return channel 120 are both lower than the liquid level of the coolant. Therefore, the coolant can enter the cooling channel 110 and the return channel 120 at the same time under the action of gravity. Then, when the cooling channel 110 and the flow channel screw 210 rotate relative to each other, the coolant in the cooling channel 110 flows out through the flow channel screw 210 and enters the cooling tank 200. As the water level of the coolant in the cooling channel 110 decreases, the coolant in the return channel 120 will flow through the cooling channel 110. The connecting channel 130 enters the cooling channel 110 and flows out through the runner screw 210. At the same time, when the cooling channel 110 and the runner screw 210 rotate relative to each other, some coolant still enters the cooling channel 110 under the action of gravity; that is, for the entire cycle, the coolant enters the cooling channel 110 through the return channel 120 and directly enters the cooling channel 110 under the action of gravity, and then flows out through the runner screw 210 and returns to the cooling tank 200, thereby completing a cycle.

[0038] In another specific embodiment, the cooling channel 110 is higher than the liquid level of the coolant, and the return channel 120 is lower than the liquid level of the coolant. Therefore, the coolant can only enter the cooling channel 110 from the return channel 120. Subsequently, when the cooling channel 110 and the runner screw 210 rotate relative to each other, the coolant in the cooling channel 110 flows out through the runner screw 210 and enters the cooling tank 200, thereby completing a cycle.

[0039] In a specific embodiment, the connecting channel 130 and the return channel 120 may be the same channel, that is, the connecting channel 130 may be an arc-shaped channel, integrally connecting the cooling channel 110 and the return channel 120 .

[0040] In the above embodiment, the provision of the return channel 120 around the cooling channel 110 not only increases the contact area with the rotor 100 but also enhances the coolant circulation rate, preventing the coolant from being unable to flow out of the cooling channel 110 and re-enter the cooling tank 200 due to the excessively high rotational speed of the rotor 100. Therefore, by increasing the contact area between the coolant and the rotor 100 and accelerating the coolant circulation rate within the rotor 100, the heat dissipation effect of the flywheel rotor can be greatly improved. Furthermore, the above design avoids the need for an external liquid pump system, reduces the difficulty and complexity of the system structure design, and thus reduces production costs.

[0041] like Figure 6 As shown, the return channel 120 includes a plurality of sub-channels 121, which are spaced apart around the cooling channel 110. Specifically, the cross-section of the return channel 120 perpendicular to the rotation axis of the rotor 100 can be a continuous circular ring, or can include a plurality of circular arcs, which are spaced apart around the cooling channel 110 and extend to form a continuous circular ring.

[0042] By configuring the return channel 120 as a plurality of sub-channels 121 , the channel volume of each sub-channel 121 can be reduced, and the circulation speed of the coolant in the sub-channel 121 can be further increased, and the contact area with the rotor 100 can be increased, thereby enhancing the heat dissipation effect.

[0043] like Figure 1 As shown, the heat dissipation mechanism 10 further includes a housing 300 , and the rotor 100 and the cooling tank 200 are disposed in the housing 300 .

[0044] like Figure 1 As shown, the heat dissipation mechanism 10 further includes a motor stator 400 . The motor stator 400 is disposed in the housing 300 and sleeved on the rotor 100 , so as to cooperate with the rotor 100 to drive the rotor 100 to rotate around the rotation axis.

[0045] like Figure 1As shown, the heat dissipation mechanism 10 further includes a magnetic bearing stator 500, which is disposed within the housing 300 and sleeved on the rotor 100 to control the levitation of the rotor 100 relative to the magnetic bearing stator 500. There are two magnetic bearing stators 500, which are disposed on both sides of the motor stator 400 along the length of the rotating shaft.

[0046] Specifically, the magnetic bearing stator 500 is further used to control the suspension of the rotor 100 relative to the motor stator 400 and the housing 300 .

[0047] In a specific embodiment, the magnetic bearing stator 500 cooperates with the rotor 100 by providing electromagnetic force or other forms of magnetic force, so that the rotor 100 can be suspended relative to the magnetic bearing stator 500 , the motor stator 400 and the housing 300 .

[0048] like Figure 1 As shown, the heat dissipation mechanism 10 further includes an external cooling assembly 600, which is disposed on the housing 300 and is used to exchange heat with the cooling tank 200. Specifically, it is used to exchange heat with the coolant in the cooling tank 200. This dissipates heat from the cooling tank 200 or the coolant, removing heat from the rotor 100 through the external cooling assembly 600 to ensure the coolant's heat dissipation effectiveness.

[0049] Specifically, the external cooling assembly 600 includes one or more of a liquid cooling system, a heat pipe system, and an air cooling system.

[0050] In summary, the present application provides a heat dissipation mechanism, which is provided by providing a cooling channel 110 within the rotor 100, and then providing a cooling groove 200 connected to the cooling channel 110 at the end of the rotor 100, and by providing a flow channel screw 210 in the cooling groove 200 and embedding it in the cooling channel 110, so that the rotation of the rotor 100 can be used to cause the cooling channel 110 and the flow channel screw 210 to rotate relative to each other, so that the coolant in the cooling groove 200 can flow into or out of the cooling channel 110, and flow out or into the cooling channel 110 under the action of gravity, so that the coolant flows back and forth between the cooling channels 110 and continuously removes heat from the rotor 100. Furthermore, by providing a return channel 120 around the cooling channel 110, on the one hand, the contact area with the rotor 100 is increased, and on the other hand, the circulation speed of the coolant is increased, preventing the coolant from being unable to flow out of the cooling channel 110 and re-entering the cooling groove 200 due to the excessively high rotation speed of the rotor 100. Therefore, by increasing the contact area between the coolant and the rotor 100 and accelerating the circulation speed of the coolant in the rotor 100, rapid heat dissipation of the flywheel rotor can be achieved. The above design can avoid the use of an external liquid pump system, reduce the difficulty and complexity of the system structure design, and reduce production costs.

[0051] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A heat dissipation mechanism for a flywheel rotor, characterized in that: The heat dissipation mechanism comprises: a rotor, configured to rotate about a rotation axis during operation, wherein the rotor is provided with a cooling channel along the rotation axis; a cooling trough for containing a coolant, disposed at an end of the rotor along the length direction of the rotating shaft and communicating with the cooling channel, wherein the cooling trough includes a flow channel screw, and the flow channel screw is embedded in the cooling channel; Wherein, when the rotor rotates around the rotation axis, the cooling channel and the flow channel screw rotate relative to each other, thereby driving the coolant along the flow channel screw from the cooling groove into the cooling channel to dissipate heat for the rotor, and the coolant flows back from the cooling channel into the cooling groove under the action of gravity; or The coolant enters the cooling channel under the action of gravity to dissipate heat from the rotor, and when the rotor rotates around the rotation axis, the cooling channel and the flow channel screw rotate relative to each other, thereby driving the coolant along the flow channel screw from the cooling channel into the cooling tank; The rotor also includes a return channel and a connecting channel. The return channel surrounds the cooling channel and is spaced apart from the cooling channel. The connecting channel is arranged at the end of the cooling channel away from the cooling groove, and is used to connect the cooling channel with one end of the return channel. The other end of the return channel is connected to the cooling groove.

2. The heat dissipation mechanism according to claim 1, characterized in that: There are two cooling channels, which are respectively arranged at two ends of the rotor along the length direction of the rotating shaft. There are two cooling grooves, and the two cooling grooves are respectively arranged corresponding to the two cooling channels.

3. The heat dissipation mechanism according to claim 1, wherein: The return channel includes a plurality of sub-channels, and the plurality of sub-channels are spaced apart around the cooling channel.

4. The heat dissipation mechanism according to claim 1, wherein: The heat dissipation mechanism further includes a shell, and the rotor and the cooling groove are arranged in the shell.

5. The heat dissipation mechanism according to claim 4, characterized in that: The heat dissipation mechanism further includes an external cooling component, which is arranged on the shell and is used for heat exchange with the cooling tank.

6. The heat dissipation mechanism according to claim 5, characterized in that: The external cooling component includes one or a combination of a liquid cooling system, a heat pipe system and an air cooling system.

7. The heat dissipation mechanism according to claim 4, characterized in that: The heat dissipation mechanism further includes a motor stator, which is disposed in the housing and sleeved on the rotor, and is used to cooperate with the rotor to drive the rotor to rotate around the rotation axis.

8. The heat dissipation mechanism according to claim 7, characterized in that: The heat dissipation mechanism further includes a magnetic bearing stator, which is arranged in the housing and is used to suspend the rotor relative to the magnetic bearing stator.

9. The heat dissipation mechanism according to claim 8, characterized in that: There are two magnetic bearing stators, and the two magnetic bearing stators are respectively arranged on both sides of the motor stator along the length direction of the rotating shaft.

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