High-stability flywheel energy storage device

Abstract

The invention relates to the technical field of flywheel energy storage, in particular to a high-stability flywheel energy storage device which comprises a flywheel and further comprises a shell, a cavity used for installing the flywheel is formed in the shell, a fixing ring is arranged in the shell, and an air channel is formed between the fixing ring and the shell. The splitter plate is movably installed on the fixing ring and can rotate towards the flywheel so as to guide hot airflow on the circumferential face of the flywheel into the air channel to be naturally cooled and flow back to the cavity where the flywheel is located again. According to the flywheel heat dissipation device, the multiple sets of splitter plates are controlled to be opened together, hot air flow on the circumferential face of the flywheel is guided to enter the air channel for active heat dissipation, and heat-dissipated air is guided into the shell again; the air flow of the boundary layer on the whole width of the peripheral surface of the flywheel is gradually guided into the air duct, so that the boundary layer on the peripheral surface of the flywheel can be broken, and the air is fully circulated and cooled.

Description

Technical Field

[0001] The present invention relates to the technical field of flywheel energy storage, and particularly relates to a flywheel energy storage device with high stability. Background Art

[0002] A flywheel energy storage system is an efficient and energy-saving inertial energy storage device. In the prior art, heat dissipation in the flywheel energy storage device mainly reduces the ambient temperature of the flywheel by changing the ambient temperature. Usually, a high-power air conditioner is configured to cool the entire ambient temperature, and then a fan sucks the cold air in the environment into the flywheel cabinet through a filter on the door panel of the flywheel cabinet, passes through the ventilation and heat dissipation channels inside the flywheel cabinet, and is then extracted by the fan at the top of the flywheel cabinet to achieve the purpose of cooling.

[0003] Due to the large power loss of the flywheel, a high configuration of the air conditioner is required, and the maintenance and operation costs of the air conditioner are relatively high. At the same time, when the gas in the space around the flywheel interacts with the flywheel, there is a transitional boundary layer / boundary layer on the surface of the flywheel, and the gas flow velocity in its boundary layer is slower than the normal air flow, that is, the fan at the top of the cabinet cannot be utilized with maximum efficiency, so that the heat on the surface of the flywheel cannot be taken away by the fan at the top of the cabinet, resulting in the cumulative increase in the surface temperature of the flywheel and the reduction of the flywheel radiation heat dissipation efficiency.

[0004] The invention patent with the publication number CN116094251B discloses a flywheel energy storage device. By arranging multiple groups of first heat dissipation fans on the circumferential side of the flywheel, the boundary layer during the rotation of the flywheel is destroyed and heat is dissipated at the same time, and the heat dissipation effect is good. On the other hand, the angle between the heat dissipation fan and the flywheel is adjustable to increase the cooling range. However, although arranging multiple groups of first heat dissipation fans on the circumferential surface of the flywheel can directly dissipate heat from the circumferential surface of the flywheel, the rotation angle of the heat dissipation fan is fixed, the wind blown by the heat dissipation fan cannot fully dissipate heat from the entire flywheel, and at the same time, the range of the wind blown by the heat dissipation fan is relatively wide, and the air flow velocity per unit area is weak, so that the boundary layer on the circumferential surface of the flywheel cannot be fully destroyed, affecting the heat dissipation efficiency. Summary of the Invention

[0005] In view of the above-mentioned drawbacks of the prior art, the present invention provides a flywheel energy storage device with high stability, which can effectively solve the problem of insufficient heat dissipation of the flywheel by setting a fan in the prior art.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: The present invention provides a flywheel energy storage device with high stability, including a flywheel, and further including: A housing, a cavity for installing the flywheel is provided inside the housing, a fixing ring is provided inside the housing, and an air duct is formed between the fixing ring and the housing; and a flow splitter plate, which is movably installed on the fixed ring and can rotate towards the flywheel to guide the hot air flow on the circumferential surface of the flywheel into the air duct for natural cooling and then flow back into the cavity where the flywheel is located again.

[0007] Further, a drainage groove is provided on the side of the flow splitter plate facing the flywheel after rotation.

[0008] Further, multiple groups of the flow splitter plates are provided and are annularly arrayed on the fixed ring, and the rotation axis of the flow splitter plate is connected to the driving device.

[0009] Further, multiple groups of drainage grooves are provided on each group of the flow splitter plates, and the drainage grooves on multiple groups of the flow splitter plates are staggeredly distributed.

[0010] Further, it further includes side ring plates provided on the housing. Two groups of the side ring plates are provided and are distributed on both sides of the flywheel. The side ring plates are used to separate a side air cavity between the side wall of the housing and the flywheel, and the inner diameter dimension of the side ring plates is less than or equal to the outer diameter dimension of the flywheel.

[0011] Further, it further includes a movable arc plate elastically installed in the fixed ring and extending towards the flow splitter plate, and a blowing strip rotatably provided on the side ring plate and drivingly connected to the movable arc plate. An air inlet is provided on the side of the blowing strip that extends into the air duct after rotation, and multiple groups of air blowing holes are provided on the side of the blowing strip close to the flywheel.

[0012] Further, it further includes a guide plate, which is provided on the fixed ring and is located in the air duct. One end of the guide plate close to the air inlet is attached to the housing, and the gap between the other end and the housing is greater than one-third of the width of the fixed ring and less than one-half of the width of the fixed ring.

[0013] Further, a guide groove is provided on the movable arc plate, and an arc-shaped toothed plate is provided on the inner wall of the guide groove. The rotation axis of the blowing strip extends into the guide groove, and a gear meshingly connected to the arc-shaped toothed plate is provided on the rotation axis of the blowing strip.

[0014] Further, it further includes an air inlet member, which is provided on the housing, and multiple groups of exhaust fins are provided on the air inlet member. The exhaust fins pass through the side air cavity and extend towards the outer circumferential surface of the flywheel.

[0015] Further, leakage holes are provided on the fixed ring, and the leakage holes are located between adjacent flow splitter plates to connect the space between the air duct and the outer circumferential surface of the flywheel. Beneficial effects

[0016] The technical solution provided by the present invention has the following beneficial effects compared with the known prior art: 1. By controlling the simultaneous opening of the multi-component flow deflector, guiding the hot air flow on the peripheral surface of the flywheel into the air duct for active heat dissipation, and re-introducing the cooled gas back into the housing. At the same time, through the bleed grooves provided on the flow deflector, with the special setting of the bleed grooves, the boundary layer air flow across the entire width of the flywheel peripheral surface can be gradually introduced into the air duct, which can break the boundary layer on the outer peripheral surface of the flywheel and fully circulate and dissipate heat from the gas. 2. Through the cooperation of the movable arc plate and the air blowing strip, when the flow deflector is opened, the air blowing strip is driven to move towards the side surface of the flywheel. The air blowing strip blows a part of the cooled gas towards the side surface of the flywheel to break the boundary layer on the side surface of the flywheel, and at the same time replace part of the air flow, realizing re-cooling of the flywheel, improving the heat dissipation and cooling efficiency, and further protecting the flywheel. When heat dissipation and cooling of the flywheel are required, when the flow deflector and the air blowing strip are retracted, the interference to the air flow on the peripheral surface of the flywheel can be minimized, and the resistance to the flywheel is reduced to a certain extent. 3. By providing an air inlet component, the heat dissipation of the gas in the air duct can be further improved. At the same time, in cooperation with the special leakage holes provided on the fixed ring, the cooling gas in the housing can contact the flywheel more evenly, improving the stability and uniformity during the heat dissipation of the flywheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial cross-sectional view of the housing of the present invention; Figure 3 It is an exploded schematic diagram of the partial structure of the present invention; Figure 4 It is a schematic diagram of the structure of the flow deflector of the present invention; Figure 5 It is a partial cross-sectional view of the housing and the fixed ring of the present invention; Figure 6 It is a schematic diagram of the structure of the fixed ring, the air blowing strip and the guide plate of the present invention; Figure 7 It is a schematic diagram when the flow deflector and the air blowing strip are retracted in the present invention; Figure 8 It is a schematic diagram of the movable arc-shaped ring plate of the present invention; Figure 9 It is a schematic diagram of the cooperation between the movable arc plate and the air inlet component of the present invention; Figure 10 This is a schematic structural diagram of the air intake component of the present invention.

[0019] Reference numerals: 1, housing; 101, air duct; 102, side air cavity; 11, fixing ring; 111, flow dividing plate; 1101, drain groove; 12, side ring plate; 13, movable arc plate; 1301, relief through groove; 1302, guide groove; 131, gear; 132, arc-shaped toothed plate; 14, blowing strip; 141, air inlet; 15, guide plate; 16, air intake component; 161, exhaust fin; 2, flywheel. Specific embodiments

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] The present invention will be further described below with reference to the embodiments.

[0022] Referring to Figures 1-10 , a flywheel energy storage device with high stability, including a flywheel 2, further including: A housing 1, a cavity for installing the flywheel 2 is provided inside the housing 1, a fixing ring 11 is provided inside the housing 1, and an air duct 101 is formed between the fixing ring 11 and the housing 1. The inner wall of the air duct 101 is provided with annular heat dissipation fins (not shown in the figure) to increase the contact area between the gas flowing through the air duct 101 and the housing 1 to improve the active heat dissipation effect; and a flow splitter plate 111, which is movably installed on the fixed ring 11 and can rotate towards the flywheel 2 to guide the hot air flow on the circumferential surface of the flywheel 2 into the air duct 101 for natural cooling and then flow back into the cavity where the flywheel 2 is located. Since the flywheel 2 is rotating rapidly, there is a transitional boundary layer on the outer circumferential surface of the flywheel 2. The formation of the boundary layer causes the gas flow velocity to be slower than the normal air flow, which in turn affects the heat exchange of the gas on the side close to the flywheel 2. When cooling the heat generated by the rapid rotation of the flywheel 2 and the gas friction by introducing cold air in the conventional setting, the cold air cannot fully and efficiently contact the flywheel 2, thus reducing the heat dissipation efficiency. In this application, when the flow splitter plate 111 is opened and rotated towards the flywheel 2, the flow splitter plate 111 will guide the air flow in the boundary layer on the circumferential surface of the flywheel 2 into the air duct 101. First, the gas with a higher temperature in the boundary layer is separated from the outer circumferential surface of the flywheel 2. Secondly, the gas after being exported flows through the air duct 101 and fully contacts the housing 1 for active heat dissipation. Relying on the housing 1 to actively dissipate heat and re-introduce the cooled gas into the housing 1. After the air in the boundary layer on the circumferential surface of the flywheel 2 enters the air duct 101, the air in other parts of the housing 1 will automatically supplement to the circumferential surface of the flywheel 2, forming an automatic air flow cycle inside the housing 1.

[0023] Specifically, a flow discharge groove 1101 is provided on the side of the flow splitter plate 111 facing the flywheel 2 after rotation. By providing the flow discharge groove 1101 on the flow splitter plate 111, part of the air flow can be guided into the air duct 101, and the other part continues to rotate on the circumferential surface of the flywheel 2, which can reduce the resistance to the flywheel 2 and prevent the internal air flow from being disordered to generate eddy current noise.

[0024] Furthermore, multiple groups of flow splitter plates 111 are provided and distributed in an annular array on the fixed ring 11, and the rotation axis of the flow splitter plate 111 is connected to a driving device. The flow splitter plate 111 is actively opened and closed by the driving device. The opening time is determined according to the temperature inside the housing 1. The specific measure can be to set a stability sensor on the inner wall of the housing 1. By setting a threshold value, when the temperature sensor detects that the temperature reaches the threshold value, a signal is sent to the control device to start the driving device to rotate the flow splitter plate 111 for active heat dissipation.

[0025] Still further, multiple groups of flow discharge grooves 1101 are provided on each group of flow splitter plates 111, and the flow discharge grooves 1101 on multiple groups of flow splitter plates 111 are staggeredly distributed, that is, the flow discharge grooves 1101 on multiple groups of flow splitter plates 111 do not coincide in the same dimension. Under the combined action of multiple groups of flow splitter plates 111, the air flow in the boundary layer on the circumferential surface of the flywheel 2 is slowly changed, further preventing part of the air flow from quickly pouring into the air duct 101, and effectively preventing the occurrence of eddy current noise on the leeward side (i.e., the side close to the flywheel 2) of the flow splitter plate 111.

[0026] In the above technical solution, by controlling the multi-component flow plate 111 to open jointly, the hot air flow on the circumferential surface of the flywheel 2 is guided into the air duct 101 for active heat dissipation, and the cooled gas is re-introduced into the housing 1. At the same time, through the bleed slots 1101 provided on the flow plate 111, due to the special setting of the bleed slots 1101, the boundary layer air flow on the entire width of the circumferential surface of the flywheel 2 is gradually introduced into the air duct 101, and the noise problem caused by the rapid export of the air flow can be prevented.

[0027] In addition, it also includes side ring plates 12 provided on the housing 1. There are two groups of side ring plates 12 and they are distributed on both sides of the flywheel 2. The side ring plates 12 are used to separate a side air cavity 102 between the side wall of the housing 1 and the flywheel 2. The inner diameter dimension of the side ring plates 12 is less than or equal to the outer diameter dimension of the flywheel 2. Preferably, the inner diameter dimension of the side ring plates 12 is equal to the outer diameter dimension of the flywheel 2, which can minimize the blockage of the side ring plates 12 to the boundary layer air flow on the side surface of the flywheel 2 and reduce the resistance during the rotation of the flywheel 2. There is a gap between the side ring plates 12 and the flywheel 2. When the boundary layer air flow on the circumferential surface of the flywheel 2 is introduced into the air duct 101 by the flow plate 111, the air flow on the side surface of the flywheel 2 will flow into the circumferential surface of the flywheel 2 from the gap. At the same time, when the air flow on the circumferential surface of the flywheel 2 is too large, it will flow into the side air cavity 102 from the gap, realizing the gas circulation between the side air cavity 102, the circumferential surface of the flywheel 2 and the air duct 101, so as to improve the heat dissipation efficiency of the flywheel 2.

[0028] Among them, it also includes a movable arc plate 13 elastically installed in the fixed ring 11 and extending towards the flow plate 111, and a blowing strip 14 rotatably arranged on the side ring plate 12 and drivingly connected to the movable arc plate 13. When the flow plate 111 is opened, by canceling the extrusion of the movable arc plate 13, at this time the movable arc plate 13 extends and drives the blowing strip 14 to rotate. At this time, the other end of the blowing strip 14 moves towards the axis of the flywheel 2. One side of the blowing strip 14 that extends into the air duct 101 after rotation is provided with an air inlet 141, and there are multiple groups of air blowing holes on the side of the blowing strip 14 close to the flywheel 2. The rotated blowing strip 14 exports the cooled gas in the air duct 101 through the air inlet 141 and blows it towards the side surface of the flywheel 2 through the multiple groups of air blowing holes, thereby destroying the boundary layer generated by the air flow on the side surface of the flywheel 2 and further improving the heat dissipation of the flywheel 2.

[0029] In addition, it further includes a deflector 15. The deflector 15 is arranged on the fixed ring 11 and is located within the air duct 101. One end of the deflector 15 close to the air inlet 141 is in contact with the housing 1, and the gap between the other end and the housing 1 is greater than one-third of the width of the fixed ring 11 and less than one-half of the width of the fixed ring 11. Since air blowing strips 14 are provided on the sides of the two sets of side ring plates 12 away from the flywheel 2, the number of deflectors 15 is the same as that of the air blowing strips 14 and they are symmetrically distributed on the outer peripheral surface of the fixed ring 11. Through the special setting of the deflector 15, part of the cooled gas is introduced into the air blowing strips 14, and the other part continues to move within the air duct 101, ensuring that the gas in the housing 1 can circulate, thereby maintaining the continuous circulation of the gas on the circumferential surface of the flywheel 2 within the housing 1, that is, maintaining the gas flow in the boundary layer of the flywheel 2 and maintaining stable heat dissipation.

[0030] Furthermore, a guide groove 1302 is provided on the movable arc plate 13, and an arc-shaped toothed plate 132 is provided on the inner wall of the guide groove 1302. The rotating shaft of the air blowing strip 14 extends into the guide groove 1302, and a gear 131 meshing with the arc-shaped toothed plate 132 is provided on the rotating shaft of the air blowing strip 14. When the restriction of the movable arc plate 13 by the shunt plate 111 is cancelled by flipping, the movable arc plate 13 is reset by the internal elastic member. At this time, the movable arc plate 13 moves towards the shunt plate 111 direction, thereby driving the arc-shaped toothed plate 132 to move. At this time, the arc-shaped toothed plate 132 drives the gear 131 to rotate, and then the air blowing strip 14 is rotated out to blow air to the side of the flywheel 2. An exhaust grille is provided on the side of the housing 1, and the exhaust grille is located directly above the rotating shaft of the flywheel 2. Due to the combined action of heat convection and density difference, hot air will preferentially gather at the high position of the cavity. Therefore, when the hot air inside the housing 1 circulates and is blown, it will be discharged from the exhaust grille.

[0031] In the above technical solution, through the cooperation of the movable arc plate 13 and the air blowing strip 14, when the shunt plate 111 is opened, the air blowing strip 14 is driven to move towards the side of the flywheel 2. At this time, the air blowing strip 14 communicated with the air duct 101 blows part of the cooled gas to the side of the flywheel 2 to break the boundary layer on the side of the flywheel 2 and replace part of the air flow at the same time, realizing the re-cooling of the flywheel 2 and improving the heat dissipation and cooling efficiency, further protecting the flywheel 2. When the flywheel 2 does not need to be heat-dissipated and cooled, when the shunt plate 111 and the air blowing strip 14 are retracted, the interference with the air flow on the circumferential surface of the flywheel 2 can be minimized, and the resistance to the flywheel 2 is reduced to a certain extent.

[0032] It is worth noting that it also includes an air intake member 16, wherein the air intake member 16 can be provided in multiple groups, and the specific setting is based on actual conditions. The air intake member 16 is provided on the shell 1, and the air intake member 16 is used to replenish gas in the shell 1, and the gas can be external gas and cold air processed by the equipment. The air intake member 16 is provided with multiple groups of exhaust plates 161, and the movable arc plate 13 is provided with a clearance groove 1301. The exhaust plates 161 pass through the side wind cavity 102 and extend to the outer peripheral surface of the flywheel 2. At the same time, the exhaust plates 161 on the air intake member 16 are in the shape of multiple groups of plates, which will not affect the flow of gas in the air duct 101. At the same time, they will assist in cooling the gas flowing through the exhaust plates 161 in the air duct 101, so that the cold air entering the shell 1 can contact the outer peripheral surface of the flywheel 2 more evenly.

[0033] Among them, a leakage hole is provided on the fixing ring 11, and the leakage hole is located between adjacent diverter plates 111 to connect the space between the air duct 101 and the outer peripheral surface of the flywheel 2, and redirect the partially cooled gas in the air duct 101 to the peripheral surface of the flywheel 2. The blowing direction of the leakage hole is tangent to the rotation direction of the flywheel 2 to prevent the blown gas from creating resistance to the flywheel 2.

[0034] In the above technical solution, the heat dissipation of the gas in the air duct 101 can be further improved by setting the air inlet part 16. At the same time, the specially arranged air leakage holes on the fixing ring 11 can make the cooling gas in the shell 1 contact the flywheel 2 more evenly, thereby improving the stability and uniformity of the heat dissipation of the flywheel 2.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A flywheel energy storage device with high stability, comprising a flywheel (2), characterized in that, It further includes: A housing (1) with a cavity for mounting a flywheel (2) provided therein. A fixing ring (11) is provided in the housing (1), and an air duct (101) is formed between the fixing ring (11) and the housing (1); And a flow dividing plate (111) which is movably mounted on the fixing ring (11) and can rotate towards the flywheel (2) to guide the hot air flow on the circumferential surface of the flywheel (2) into the air duct (101) for natural cooling and then flow back to the cavity where the flywheel (2) is located again.

2. The high-stability flywheel energy storage device according to claim 1, characterized in that, A flow discharge groove (1101) is provided on the side of the flow dividing plate (111) facing the flywheel (2) after rotation.

3. A high-stability flywheel energy storage device according to claim 2, characterized in that, Multiple groups of the flow dividing plates (111) are provided and are distributed in an annular array on the fixing ring (11), and the rotation axis of the flow dividing plate (111) is connected to a driving device.

4. A flywheel energy storage device with high stability according to claim 3, characterized in that, Multiple groups of flow discharge grooves (1101) are provided on each group of the flow dividing plates (111), and the flow discharge grooves (1101) on multiple groups of the flow dividing plates (111) are staggeredly distributed.

5. A flywheel energy storage device with high stability according to claim 4, characterized in that, It further includes side ring plates (12) provided on the housing (1). Two groups of the side ring plates (12) are provided and are distributed on both sides of the flywheel (2). The side ring plates (12) are used to separate a side air cavity (102) between the side wall of the housing (1) and the flywheel (2). The inner diameter dimension of the side ring plates (12) is less than or equal to the outer diameter dimension of the flywheel (2).

6. The high-stability flywheel energy storage device according to claim 5, characterized in that, It further includes a movable arc plate (13) elastically mounted in the fixing ring (11) and extending towards the flow dividing plate (111), and a blowing strip (14) rotatably provided on the side ring plate (12) and drivingly connected to the movable arc plate (13). An air inlet (141) is provided on the side of the blowing strip (14) extending into the air duct (101) after rotation, and multiple groups of air blowing holes are provided on the side of the blowing strip (14) close to the flywheel (2).

7. A flywheel energy storage device with high stability according to claim 6, characterized in that, It further includes a guiding plate (15) which is provided on the fixing ring (11) and is located in the air duct (101). One end of the guiding plate (15) close to the air inlet (141) is in contact with the housing (1), and the gap between the other end and the housing (1) is greater than one-third of the width of the fixing ring (11) and less than one-half of the width of the fixing ring (11).

8. A flywheel energy storage device with high stability according to claim 6, characterized in that, A guiding groove (1302) is provided on the movable arc plate (13), and an arc-shaped toothed plate (132) is provided on the inner wall of the guiding groove (1302). The rotation axis of the blowing strip (14) extends into the guiding groove (1302), and a gear (131) meshingly connected to the arc-shaped toothed plate (132) is provided on the rotation axis of the blowing strip (14).

9. A flywheel energy storage device with high stability according to claim 8, characterized in that, It further includes an air inlet member (16) which is provided on the housing (1), and multiple groups of exhaust fins (161) are provided on the air inlet member (16). The exhaust fins (161) pass through the side air cavity (102) and extend towards the outer circumferential surface of the flywheel (2).

10. A flywheel energy storage device with high stability according to claim 9, characterized in that, Leakage holes are provided on the fixing ring (11), and the leakage holes are located between adjacent flow dividing plates (111) to connect the space between the air duct (101) and the outer circumferential surface of the flywheel (2).

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