A high-stability flywheel energy storage device

Abstract

The present invention relates to the field of flywheel energy storage technology, and specifically to a high-stability flywheel energy storage device, comprising a flywheel and a housing, wherein a cavity for mounting the flywheel is provided in the housing, a fixed ring is provided in the housing, and an air duct is formed between the fixed ring and the housing; and a diverter plate, wherein the diverter plate is movably mounted on the fixed ring and can rotate toward the flywheel to guide the hot air flow around the flywheel into the air duct for natural cooling and then flow back to the cavity where the flywheel is located. The present invention controls the simultaneous opening of multiple groups of diverter plates to guide the hot air flow around the flywheel into the air duct for active heat dissipation, and re-introduces the heat-dissipated gas into the housing. At the same time, through the special arrangement of the drainage grooves provided on the diverter plate, the boundary layer airflow on the entire width of the flywheel is gradually introduced into the air duct, which can break the boundary layer on the outer surface of the flywheel and fully circulate the gas and dissipate heat.

Description

Technical Field

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

[0002] The flywheel energy storage system is a highly efficient and energy-saving inertial energy storage device. In the existing technology, the heat dissipation in the flywheel energy storage device is mainly achieved by changing the ambient temperature to reduce the ambient temperature of the flywheel. It is usually equipped with a high-power air conditioner to cool the entire ambient temperature. The fan then draws the cold air from the environment into the flywheel cabinet through the filter on the flywheel cabinet door panel, passes through the ventilation and heat dissipation channel inside the flywheel cabinet, and is then drawn out by the fan on the top of the flywheel cabinet to achieve the cooling purpose.

[0003] Due to the large power loss of the flywheel, the required air conditioning configuration is high, and the air conditioning maintenance and operation costs are 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 flywheel surface. The gas flow rate in the boundary layer is slower than the normal airflow, that is, the fan on the top of the cabinet cannot be used with maximum efficiency. In this way, the surface heat of the flywheel cannot be removed by the fan on the top of the cabinet, resulting in a cumulative increase in the temperature of the flywheel surface and a decrease in the radiation heat dissipation efficiency of the flywheel.

[0004] The invention patent with announcement number CN116094251B discloses a flywheel energy storage device. By arranging multiple groups of first cooling fans on the periphery of the flywheel, the boundary layer of the flywheel is destroyed when it rotates, and heat is dissipated at the same time, with good heat dissipation effect. On the other hand, the angle between the cooling fan and the flywheel is adjustable to increase the cooling range. However, although arranging multiple groups of first cooling fans on the periphery of the flywheel can directly dissipate heat on the periphery of the flywheel, the rotation angle of the cooling fan is fixed, and the wind blown by the cooling fan cannot fully dissipate heat for the entire flywheel. At the same time, the wind blown by the cooling fan has a wide range, and the air flow velocity per unit area is weak, which cannot fully destroy the boundary layer on the periphery of the flywheel, affecting the heat dissipation efficiency. Summary of the Invention

[0005] In view of the above-mentioned shortcomings 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 objectives, the present invention is implemented through the following technical solutions:

[0007] The present invention provides a high-stability flywheel energy storage device, comprising a flywheel and:

[0008] A housing, wherein a cavity for mounting a flywheel is provided in the housing, a fixing ring is provided in the housing, and an air duct is formed between the fixing ring and the housing;

[0009] And a diverter plate, which is movably mounted on the fixed ring and can rotate toward the flywheel to guide the hot air flow around the flywheel into the air duct for natural cooling and then flow back to the cavity where the flywheel is located.

[0010] Furthermore, a discharge groove is provided on the side of the diverter plate facing the flywheel after rotation.

[0011] Furthermore, the diverter plates are provided in multiple groups and distributed in an annular array on the fixed ring, and the rotating shafts of the diverter plates are connected to the driving device.

[0012] Furthermore, there are multiple groups of discharge grooves on each group of the diverter plates, and the discharge grooves on the multiple groups of the diverter plates are staggered.

[0013] Furthermore, it also includes side ring plates arranged on the shell, and the side ring plates are provided in two groups and distributed on both sides of the flywheel. The side ring plates are used to separate the side air cavity between the side wall of the shell and the flywheel, and the inner diameter of the side ring plates is less than or equal to the outer diameter of the flywheel.

[0014] Furthermore, it also includes a movable arc plate elastically installed in the fixed ring and extending toward the diverter plate, and a blowing strip rotatably arranged on the side ring plate and drivingly connected to the movable arc plate. After the blowing strip rotates, an air inlet is provided on the side extending into the air duct, and a plurality of groups of blowing holes are provided on the side of the blowing strip close to the flywheel.

[0015] Furthermore, it also includes a guide plate, which is arranged on the fixing ring and located in the air duct, and the guide plate is in contact with the shell at one end close to the air inlet, and the gap between the other end and the shell is greater than one-third of the width of the fixing ring and less than one-half of the width of the fixing ring.

[0016] Furthermore, the movable arc plate is provided with a guide groove, and the inner wall of the guide groove is provided with an arc-shaped tooth plate, the rotating shaft of the blowing strip extends into the guide groove, and the rotating shaft of the blowing strip is provided with a gear meshing with the arc-shaped tooth plate.

[0017] Furthermore, it also includes an air intake member, which is arranged on the shell and has multiple groups of exhaust fins. The exhaust fins pass through the side wind cavity and extend to the outer peripheral surface of the flywheel.

[0018] Furthermore, the fixing ring is provided with an air leakage hole, and the air leakage hole is located between adjacent diverter plates to connect the space between the air duct and the outer peripheral surface of the flywheel. Beneficial effects

[0019] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0020] First, by controlling the simultaneous opening of multiple groups of manifolds, the hot air around the flywheel is guided into the air duct for active heat dissipation, and the heat-dissipated gas is re-introduced into the shell. At the same time, through the special design of the drainage grooves provided on the manifolds, the boundary layer airflow over the entire width of the flywheel surface is gradually guided into the air duct, which can break up the boundary layer on the outer surface of the flywheel and fully circulate the gas and dissipate heat;

[0021] Second, through the cooperation of the movable arc plate and the blowing strip, the blowing strip is driven to move toward the side of the flywheel when the diverter plate is opened. The blowing strip blows part of the cooled gas to the side of the flywheel to destroy the boundary layer on the side of the flywheel, while replacing part of the airflow to achieve further cooling of the flywheel, improve the heat dissipation and cooling efficiency, and further protect the flywheel. When the flywheel needs to be cooled, the diverter plate and the blowing strip are retracted to minimize the interference with the airflow around the flywheel, thereby reducing the resistance to the flywheel to a certain extent.

[0022] 3. The provision of an air inlet can further improve the heat dissipation of the gas in the air duct. At the same time, the specially provided air leakage holes on the fixing ring can make the cooling gas in the shell contact the flywheel more evenly, thereby improving the stability and uniformity of the flywheel's heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 A partial cross-sectional view of the housing of the present invention;

[0026] Figure 3 It is a schematic diagram of the explosion of the local structure of the present invention;

[0027] Figure 4 Schematic diagram of the structure of the diverter plate of the present invention;

[0028] Figure 5 It is a partial cross-sectional view of the housing and the fixing ring of the present invention;

[0029] Figure 6 This is a schematic structural diagram of the fixing ring, the blowing strip and the guide plate of the present invention;

[0030] Figure 7 This is a schematic diagram of the diverter plate and the blowing strip of the present invention when they are folded up;

[0031] Figure 8 Schematic diagram of the movable arc-shaped ring plate of the present invention;

[0032] Figure 9 Schematic diagram of the cooperation between the movable arc plate and the air inlet member of the present invention;

[0033] Figure 10 Schematic diagram of the structure of the air intake component of the present invention.

[0034] Figure numerals: 1. Shell; 101. Air duct; 102. Side air chamber; 11. Fixed ring; 111. Diverter plate; 1101. Discharge groove; 12. Side ring plate; 13. Movable arc plate; 1301. Make way groove; 1302. Guide groove; 131. Gear; 132. Arc-shaped tooth plate; 14. Blowing strip; 141. Air inlet; 15. Guide plate; 16. Air intake member; 161. Exhaust plate; 2. Flywheel. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] The present invention will be further described below with reference to the embodiments.

[0037] Refer to the attached Figure 1-10 , a high-stability flywheel energy storage device, comprising a flywheel 2, and further comprising:

[0038] The housing 1 has a cavity for mounting the flywheel 2 therein, a fixing ring 11 therein, and an air duct 101 formed between the fixing ring 11 and the housing 1. The inner wall of the air duct 101 is provided with an annular heat sink (not shown) to increase the contact area between the gas flowing through the air duct 101 and the housing 1, thereby improving the active heat dissipation effect;

[0039] And the diverter plate 111, the diverter plate 111 is movably mounted on the fixed ring 11 and can rotate toward the flywheel 2 to guide the hot air flow around the flywheel 2 to the air duct 101 for natural cooling and then flow back to the cavity where the flywheel 2 is located. Since the flywheel 2 has a transitional boundary layer on the outer surface of the flywheel 2 during rapid rotation, the formation of the boundary layer causes the gas flow rate to be slower than the normal air flow, thereby affecting the heat exchange of the gas close to the side of the flywheel 2. When the conventional setting is used to introduce cold air to cool the heat generated by the rapid rotation of the flywheel 2 and the friction between the gas, the cold air cannot fully and efficiently contact the flywheel 2, thereby reducing the heat dissipation. Thermal efficiency, and when the present application opens the diverter plate 111 and rotates it toward the flywheel 2, the diverter plate 111 will guide the airflow in the boundary layer around the flywheel 2 into the air duct 101, first separating the higher temperature gas in the boundary layer from the outer peripheral surface of the flywheel 2, and then the guided gas flows through the air duct 101 and fully contacts the shell 1 and actively dissipates heat, relying on the shell 1 to actively dissipate heat and reintroduce the dissipated gas into the shell 1, after the boundary layer gas around the flywheel 2 enters the air duct 101, the gas in other parts of the shell 1 will automatically replenish the peripheral surface of the flywheel 2, forming an automatic circulation of airflow inside the shell 1.

[0040] Specifically, after the diverter plate 111 rotates, a discharge groove 1101 is provided on the side facing the flywheel 2. By providing the discharge groove 1101 on the diverter plate 111, local airflow can be introduced into the air duct 101, while the other part continues to rotate around the flywheel 2, thereby reducing the resistance to the flywheel 2 and preventing the internal airflow from being turbulent and generating eddy noise.

[0041] Furthermore, the diverter plates 111 are provided with multiple groups and distributed in a circular array on the fixed ring 11, and the rotating shaft of the diverter plates 111 is connected to the driving device. The diverter plates 111 are actively opened and closed by the driving device, and the opening timing is determined according to the internal temperature of the shell 1. The specific measures can be achieved by setting a stability sensor on the inner wall of the shell 1. By setting a threshold, when the temperature sensor detects that the temperature reaches the threshold, a signal is generated to the control device to start the driving device to rotate the diverter plate 111 for active heat dissipation.

[0042] Furthermore, there are multiple groups of discharge grooves 1101 on each group of diverter plates 111, and the discharge grooves 1101 on the multiple groups of diverter plates 111 are staggered, that is, the discharge grooves 1101 on the multiple groups of diverter plates 111 do not overlap in the same dimension. Under the joint action of the multiple groups of diverter plates 111, the boundary layer airflow around the flywheel 2 is slowly changed, further preventing the local airflow from quickly rushing into the air duct 101, and effectively preventing the leeward side of the diverter plate 111 (that is, the side close to the flywheel 2) from generating eddies and causing noise.

[0043] In the above technical solution, by controlling the simultaneous opening of multiple groups of diverter plates 111, the hot air flow around the flywheel 2 is guided into the air duct 101 for active heat dissipation, and the heat-dissipated gas is re-introduced into the shell 1. At the same time, through the leakage groove 1101 set on the diverter plate 111, the boundary layer airflow on the entire width of the circumference of the flywheel 2 is gradually introduced into the air duct 101 through the special setting of the leakage groove 1101, and the noise problem caused by the rapid discharge of the airflow can be prevented.

[0044] In addition, it also includes a side ring plate 12 arranged on the shell 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 the side wind cavity 102 between the side wall of the shell 1 and the flywheel 2. The inner diameter of the side ring plate 12 is less than or equal to the outer diameter of the flywheel 2. The inner diameter of the side ring plate 12 is preferably equal to the outer diameter of the flywheel 2. It can minimize the obstruction of the side ring plate 12 to the boundary layer airflow on the side of the flywheel 2 and reduce the resistance of the flywheel 2 during rotation. A gap is provided between the side ring plate 12 and the flywheel 2. When the boundary layer airflow on the peripheral surface of the flywheel 2 is introduced into the air duct 101 by the diverter plate 111, the airflow on the side of the flywheel 2 will flow from the gap into the peripheral surface of the flywheel 2. At the same time, when the airflow on the peripheral surface of the flywheel 2 is too large, it will flow from the gap into the side wind cavity 102, realizing gas circulation between the side wind cavity 102, the peripheral surface of the flywheel 2 and the air duct 101, thereby improving the heat dissipation efficiency of the flywheel 2.

[0045] Among them, it also includes a movable arc plate 13 elastically installed in the fixed ring 11 and extending toward the diverter 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 diverter plate 111 is opened, by canceling the squeezing of the movable arc plate 13, the movable arc plate 13 extends out and drives the blowing strip 14 to rotate. At this time, the other end of the blowing strip 14 moves toward the axis of the flywheel 2. After the blowing strip 14 rotates, an air inlet 141 is provided on the side extending into the air duct 101, and a plurality of groups of blowing holes are provided on the side of the blowing strip 14 close to the flywheel 2. After the rotation, the blowing strip 14 discharges the cooled gas in the air duct 101 through the air inlet 141 and blows toward the side of the flywheel 2 through the plurality of blowing holes, thereby destroying the boundary layer generated by the airflow on the side of the flywheel 2, and further improving the heat dissipation of the flywheel 2.

[0046] In addition, it also includes a guide plate 15, which is arranged on the fixed ring 11 and located in the air duct 101, and one end of the guide plate 15 close to the air inlet 141 is in contact with the shell 1, and the gap between the other end and the shell 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 the two sets of side ring plates 12 are provided with blowing strips 14 on the side away from the flywheel 2, the number of guide plates 15 is the same as the number of blowing strips 14 and is symmetrically distributed on the outer peripheral surface of the fixed ring 11. Through the special setting of the guide plate 15, part of the cooled gas is introduced into the blowing strips 14, and the other part continues to move in the air duct 101, ensuring that the gas in the shell 1 can circulate, thereby maintaining the continuous circulation of the gas around the flywheel 2 in the shell 1, that is, maintaining the boundary layer gas flow of the flywheel 2 and maintaining stable heat dissipation.

[0047] 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 blowing strip 14 extends into the guide groove 1302, and a gear 131 is provided on the rotating shaft of the blowing strip 14 that is meshed with the arc-shaped toothed plate 132. When the diverter plate 111 flips over to cancel the restriction on the movable arc plate 13, the movable arc plate 13 is reset by the internal elastic member. At this time, the movable arc plate 13 moves toward the diverter plate 111, 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, thereby rotating the blowing strip 14 out to achieve blowing on the side of the flywheel 2. An exhaust grille is provided on the side of the shell 1, and the exhaust grille is located directly above the rotating shaft of the flywheel 2. Due to the combined effect of heat convection and density difference, hot air will preferentially gather at the high point of the cavity. Therefore, when the hot air circulates and is blown inside the shell 1, it will be discharged from the exhaust grille.

[0048] In the above technical solution, the movable arc plate 13 and the blowing strip 14 cooperate to drive the blowing strip 14 to move toward the side of the flywheel 2 while the diverter plate 111 is opened. At this time, the blowing strip 14 connected to the air duct 101 blows part of the cooled gas to the side of the flywheel 2 to destroy the boundary layer on the side of the flywheel 2, and replaces part of the airflow at the same time to achieve further cooling of the flywheel 2, improve the heat dissipation and cooling efficiency, and further protect the flywheel 2. When the flywheel 2 does not need to be cooled, the diverter plate 111 and the blowing strip 14 are retracted, which can minimize the interference with the airflow around the flywheel 2 and reduce the resistance to the flywheel 2 to a certain extent.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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 high-stability flywheel energy storage device, comprising a flywheel (2), characterized in that: Also includes: A housing (1), wherein a cavity for mounting a flywheel (2) is provided in the housing (1), 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 diverter plate (111), wherein the diverter plate (111) is movably mounted on the fixed ring (11) and is capable of rotating toward the flywheel (2) to guide the hot air flow around the flywheel (2) into the air duct (101) for natural cooling and then flows back to the cavity where the flywheel (2) is located; After the diverter plate (111) rotates, a side facing the flywheel (2) is provided with a discharge groove (1101); the diverter plate (111) is provided with multiple groups and distributed in a circular array on the fixed ring (11), and the rotating shaft of the diverter plate (111) is connected to the driving device; each group of the diverter plates (111) is provided with multiple groups of discharge grooves (1101), and the discharge grooves (1101) on the multiple groups of the diverter plates (111) are staggered.

2. A high-stability flywheel energy storage device according to claim 1, characterized in that: It also includes side ring plates (12) arranged on the housing (1), wherein two groups of the side ring plates (12) are provided and distributed on both sides of the flywheel (2), and 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), and the inner diameter of the side ring plates (12) is less than or equal to the outer diameter of the flywheel (2).

3. A high-stability flywheel energy storage device according to claim 2, characterized in that: The invention also includes a movable arc plate (13) elastically mounted in the fixed ring (11) and extending toward the diverter plate (111), and a blowing strip (14) rotatably mounted on the side ring plate (12) and drivingly connected to the movable arc plate (13), wherein the blowing strip (14) is provided with an air inlet (141) on one side extending into the air duct (101) after rotation, and a plurality of blowing holes are provided on the side of the blowing strip (14) close to the flywheel (2).

4. A high-stability flywheel energy storage device according to claim 3, characterized in that: The air guide plate (15) is also included. The air guide plate (15) is arranged on the fixed ring (11) and is located in the air duct (101). One end of the air guide plate (15) close to the air inlet (141) is in contact with the shell (1), and the gap between the other end and the shell (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).

5. A high-stability flywheel energy storage device according to claim 4, characterized in that: A guide groove (1302) is provided on the movable arc plate (13), and an arc-shaped tooth plate (132) is provided on the inner wall of the guide groove (1302). The rotating shaft of the blowing strip (14) extends into the guide groove (1302), and a gear (131) meshingly connected with the arc-shaped tooth plate (132) is provided on the rotating shaft of the blowing strip (14).

6. A high-stability flywheel energy storage device according to claim 5, characterized in that: It also includes an air intake member (16), the air intake member (16) being arranged on the housing (1), and the air intake member (16) being provided with a plurality of exhaust fins (161), the exhaust fins (161) passing through the side wind cavity (102) and extending toward the outer peripheral surface of the flywheel (2).

7. A high-stability flywheel energy storage device according to claim 6, characterized in that: The fixing ring (11) is provided with an air leakage hole, and the air 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).

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