CN217883068U - Heat radiation structure of flywheel energy storage device and flywheel energy storage device - Google Patents
Heat radiation structure of flywheel energy storage device and flywheel energy storage device Download PDFInfo
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- CN217883068U CN217883068U CN202123001603.8U CN202123001603U CN217883068U CN 217883068 U CN217883068 U CN 217883068U CN 202123001603 U CN202123001603 U CN 202123001603U CN 217883068 U CN217883068 U CN 217883068U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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Abstract
The utility model discloses a heat radiation structure and flywheel energy memory of flywheel energy memory, heat radiation structure includes the frame, the frame be bilayer structure, including outer wall and inner wall, outer wall and inner wall between be provided with the runner, the inside wall of inner wall on be provided with black body radiation material layer, the runner internal circulation flow have coolant; the flywheel energy storage device comprises a flywheel body arranged in a base, upper supports connected with the base are arranged on two sides of the upper portion of the flywheel body, lower supports connected with the base are arranged on the lower portion of the flywheel body, stators are arranged on the upper supports and the lower supports, cooling ring pipes are arranged on the stators, and cooling media flow in the cooling ring pipes. The utility model provides a motor stator and rotor, the heat dissipation problem of magnetic suspension bearing stator and rotor, reduced the temperature of motor and magnetic bearing, improved flywheel energy memory's reliability and life-span.
Description
Technical Field
The utility model relates to a flywheel energy storage technical field specifically is a flywheel energy memory's heat radiation structure and flywheel energy memory.
Background
The flywheel energy storage system is a common system which adopts a flywheel motor to freely convert mechanical energy and electric energy and stores system energy. Such as single-rotor single-stator disc type permanent magnet motor, double-rotor single-stator disc type permanent magnet motor, etc., has the advantages of no iron core and ferromagnetic loss of the stator, high efficiency, etc.
The magnetic suspension flywheel energy storage refers to an energy storage flywheel supported by a magnetic suspension bearing. The traditional mechanical bearing has larger friction loss, and the energy loss in the energy storage process is very large by adopting a flywheel energy storage system of the mechanical bearing. The magnetic suspension bearing is adopted to support the flywheel, and the bearing pair is not in direct contact, so that the bearing is stable in operation, the abrasion is basically avoided in the operation process, and the service life of the bearing is long.
Because the internal space of the magnetic suspension flywheel energy storage device is compact and is in a vacuum environment, no air medium exists, and heat dissipation is not available through air convection and heat conduction. Dissipation of heat from the internal components of the device is only achieved by two forms: structural heat conduction and vacuum heat radiation.
Two heat sources are mainly arranged in the flywheel energy storage device: 1. the iron loss and the copper loss of a motor stator and the eddy current loss of rotor magnetic steel are mainly generated in the charging/discharging process, and the heat loss is very small in the standby process of a flywheel. 2. The iron loss and the copper loss of a stator of the magnetic suspension bearing and the iron loss of a rotor exist all the time in the charging/discharging and standby processes.
Along with the improvement of the single-machine power of the flywheel energy storage device, the loss of each heating source is increased, the high-power flywheel energy storage device works in a cycle of charging/standby/discharging for a long time, if the loss described above is not transmitted in time, the temperature of each working part is increased rapidly due to the accumulation of the loss, the service life of a stator and a rotor of the motor is shortened greatly, the working performance of the magnetic bearing is reduced, the performance control of the motor and the magnetic bearing is difficult, and even serious hidden danger is brought to the safe operation of the flywheel energy storage device.
However, there are many heat dissipation structures for flywheel energy storage devices so far, for example, cooling pipes are arranged in the flywheel and the rotor for cooling, but the flow of fluid in the inner hole of the rotor may cause disturbance to the rotor, and particularly, at high speed, the flywheel rotor may be unstable; the rotor and the heat pipe are sealed by magnetic fluid, the structure is complex, and the problem of seal leakage exists; heat pipes are arranged on the rotor and the stator winding to conduct heat out, but the sealing leakage problem also exists when the heat pipes are arranged on the rotor. Therefore, no reliable heat dissipation cooling scheme is provided at present to meet the heat dissipation requirement of the flywheel energy storage device.
SUMMERY OF THE UTILITY MODEL
The utility model provides a flywheel energy memory's heat radiation structure and flywheel energy memory has solved motor stator and rotor, and the heat dissipation problem of magnetic suspension bearing stator and rotor has reduced the temperature of motor and magnetic bearing, has improved flywheel energy memory's reliability and life-span.
In order to achieve the above object, in a first aspect, the present invention provides the following technical solutions: a heat dissipation structure for a flywheel energy storage device, comprising:
the frame, the frame be bilayer structure, including outer wall and inner wall, outer wall and inner wall between be provided with the runner, the inside wall of inner wall on be provided with black body radiation material layer, the runner inner loop flow have coolant.
Preferably, the flow channel between the outer wall and the inner wall is formed by dividing a flow channel rib.
Preferably, a plurality of heat dissipation ribs are arranged on the outer side of the outer wall.
In a second aspect, the utility model provides a flywheel energy memory, it is including setting up as the first aspect the inside flywheel body of frame, the upper portion both sides of flywheel body be provided with the upper bracket that links to each other with the frame, the lower part of flywheel body be provided with the lower carriage that links to each other with the frame, upper bracket and lower carriage on all install the stator, the stator on install the cooling ring canal, the cooling ring canal in flow have coolant.
Preferably, the stator comprises an upper radial magnetic bearing stator and an axial magnetic bearing stator which are arranged on an upper bracket, and a lower radial bearing stator and a motor stator which are arranged on a lower bracket, the upper side wall of the flywheel body is provided with an upper radial magnetic bearing rotor and an axial magnetic bearing thrust disc which are in one-to-one correspondence with the upper radial magnetic bearing stator and the axial magnetic bearing stator, and the lower side wall of the flywheel body is provided with a lower radial magnetic bearing rotor and a motor rotor which are in one-to-one correspondence with the lower radial bearing stator and the motor stator;
the cooling ring pipe comprises an upper cooling ring pipe and a lower cooling ring pipe, the upper radial magnetic bearing stator and the axial magnetic bearing stator are connected with the upper cooling ring pipe, and the lower radial bearing stator and the motor stator are connected with the upper cooling ring pipe.
Furthermore, the upper cooling ring pipe and the lower cooling ring pipe are respectively connected with an upper cooling medium inlet and a lower cooling medium inlet on the machine base through an upper collecting pipe and a lower collecting pipe, the upper cooling medium inlet and the lower cooling medium inlet are simultaneously communicated with a flow channel in the machine base, and the machine base is also provided with a cooling medium outlet.
Preferably, the cooling ring pipe is connected with the stator in an interference fit mode.
Preferably, the cooling ring pipe is disposed at a yoke portion of the stator and arranged in a circumferential direction.
Preferably, the cooling ring pipe is arranged in an S shape.
Preferably, the upper side and the lower side of the flywheel body are respectively connected with the engine base through an upper auxiliary bearing and a lower auxiliary bearing.
Compared with the prior art, the beneficial effects of the utility model are that:
the engine base is of a double-layer structure and comprises an inner wall, a flow channel and an outer wall, wherein the flow channel can be arranged spirally, horizontally or vertically, heat inside the flywheel energy storage device is taken away through a cooling medium in the flow channel through an air-water heat exchanger, the heat generated by the stator is transferred to the engine base in a heat conduction mode, the inner wall of the engine base is coated with a layer of black body radiation coating to absorb the heat radiated from a heating component, and a yoke part of the motor stator and the magnetic bearing stator is provided with a cooling ring pipe in the circumferential direction and finally converges to the inner wall of the flywheel engine base. In order to enhance the heat dissipation effect, the outer side of the outer wall is provided with transverse or longitudinal heat dissipation ribs, and partial heat can be taken away through heat convection with the environment. The high-temperature problem of the motor and the magnetic suspension bearing is solved, and the running reliability and the service life of the flywheel energy storage device are improved.
Drawings
Fig. 1 is a schematic structural view of a main body of the flywheel energy storage device of the present invention;
FIG. 2 is a block diagram of the cooling collar of the present invention;
FIG. 3 is a view showing the installation structure of the cooling collar of the present invention;
fig. 4 is a partial sectional structural view of the frame of the present invention.
Reference numerals:
1. the cooling structure comprises an upper auxiliary bearing, 11, a lower cooling ring pipe, 12, a lower auxiliary bearing, 13, a motor rotor, 14, a motor stator, 15, a lower radial bearing stator, 16, a lower radial magnetic bearing rotor, 17, a flywheel body, 18, an axial magnetic bearing stator, 19, an axial magnetic bearing thrust disc, 2, an upper radial magnetic bearing rotor, 21, a machine base, 3, an upper radial magnetic bearing stator, 4, an upper collecting pipe, 5, a cooling medium upper inlet, 6, an upper support, 7, a cooling medium outlet, 8, a lower support, 9, a lower collecting pipe, 10, a cooling medium lower inlet, 20, an upper cooling ring pipe, 201, a cooling ring pipe, 204, a stator, 301, an outer wall, 302, a flow channel rib, 303, an inner wall, 304, a flow channel, 305, a black body radiation material layer, 306 and a heat dissipation rib.
Detailed Description
The technical solution 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.
As shown in fig. 1-4, the utility model discloses a solve the high temperature problem of motor and magnetic suspension bearing, improved flywheel energy memory's operational reliability and life-span, the utility model provides a following technical scheme:
example 1:
a heat dissipation structure of a flywheel energy storage device, comprising:
the engine base 21, the engine base 21 be bilayer structure, including outer wall 301 and inner wall 303, outer wall 301 and inner wall 303 between be provided with runner 304, the inside wall of inner wall 303 on be provided with black body radiation material layer 305, runner 304 internal circulation flow have a cooling medium, can take away the heat that the inside heating component of engine base 21 radiated on the engine base 21 through the continuous flow of cooling medium, and black body radiation material layer 305 has the effect of heat absorption, and the heat of absorption also can directly be taken away by the cooling medium in runner 304, and the cooling medium can be water, ethylene glycol etc., and runner 304 can be spiral, horizontal, or vertical arrangement. Blackbody under any conditions, a body that completely absorbs any wavelength of extraneous radiation without any reflection, i.e., a body with an absorption ratio of 1, can be sprayed with a material for the blackbody on the inner sidewall of the inner wall 303. The flow channel 304 between the outer wall 301 and the inner wall 303 is formed by separating the flow channel rib 302, and the flow channel rib 302 can be an additional component, and can be flexibly arranged between the outer wall 301 and the inner wall 303 to separate the flow channels 304 with different shapes.
Meanwhile, in order to further improve the heat dissipation effect, the outer side of the outer wall 301 is provided with a plurality of heat dissipation ribs 306, the heat dissipation ribs 306 can be transversely or longitudinally arranged, the connection mode can adopt a welding or casting mode, the surface area of the outer wall 301 can be improved, the heat dissipation effect is improved, and the number of the heat dissipation ribs 306 can be increased or decreased as required.
Example 2:
the embodiment provides a flywheel energy storage device, which comprises a flywheel body 17 arranged in a base 21 as described in embodiment 1, wherein upper supports 6 connected with the base 21 are arranged on two sides of the upper portion of the flywheel body 17, a lower support 8 connected with the base 21 is arranged on the lower portion of the flywheel body 17, stators 204 are respectively arranged on the upper supports 6 and the lower supports 8, cooling circular pipes 201 are arranged on the stators 204, cooling media flow in the cooling circular pipes 201, interference fit is formed between the lower supports 8 and the base 21 and between the lower supports 8 and the base 8, heat generated by the stators 204 can be transferred to the base 21, and the heat can be taken away through the cooling media flowing in the base 21.
Meanwhile, in order to improve the heat dissipation and cooling effects of the stator 204, the cooling ring pipe 201 is further arranged on the stator 204, and the cooling medium in the cooling ring pipe 201 can also quickly take away heat on the stator 204, so that the purpose of quickly dissipating heat is achieved.
In this embodiment, the flywheel energy storage device has various stators therein, specifically, the stator 204 includes an upper radial magnetic bearing stator 3 and an axial magnetic bearing stator 18 mounted on the upper bracket 6, and a lower radial bearing stator 15 and a motor stator 14 mounted on the lower bracket 8, the upper side wall of the flywheel body 17 is mounted with upper radial magnetic bearing rotors 2 and axial magnetic bearing thrust disks 19 corresponding to the upper radial magnetic bearing stator 3 and the axial magnetic bearing stator 18 one by one, and the lower side wall of the flywheel body 17 is mounted with lower radial magnetic bearing rotors 16 and motor rotors 13 corresponding to the lower radial magnetic bearing stator 15 and the motor stator 14 one by one;
meanwhile, in order to simultaneously dissipate heat of a plurality of stators, the cooling ring pipe 201 comprises an upper cooling ring pipe 20 and a lower cooling ring pipe 11, the upper radial magnetic bearing stator 3 and the axial magnetic bearing stator 18 are connected with the upper cooling ring pipe 20, the lower radial bearing stator 15 and the motor stator 14 are connected with the upper cooling ring pipe 20, the upper cooling ring pipe 20 and the lower cooling ring pipe 11 are not connected with each other as a connection mode of the cooling ring pipe 201, the upper cooling ring pipe 20 and the lower cooling ring pipe 11 are respectively connected with an upper cooling medium inlet 5 and a lower cooling medium inlet 10 on the base 21 through an upper bus pipe 4 and a lower bus pipe 9, the upper cooling medium inlet 5 and the lower cooling medium inlet 10 are simultaneously communicated with a flow channel 304 inside the base 21, the base 21 is further provided with a cooling medium outlet 7, and the cooling media in the upper cooling ring pipe 20 and the lower cooling ring pipe 11 are the same as the cooling medium in the base 21 and form a circulation system, so that heat can be quickly taken away.
In order to make the heat dissipation and transmission of the stator 204 faster, the cooling collar 201 and the stator 204 are connected in an interference fit manner, and the cooling collar 201 can be embedded into the stator 204, so that the contact area for heat dissipation can be increased, and the heat dissipation efficiency can be improved.
In the present embodiment, the cooling collar 201 is disposed at the yoke of the stator 204 and arranged along the circumferential direction, and since the yoke of the stator 204 is the main location for generating heat, the cooling collar 201 is disposed at the yoke of the stator 204 to directly remove the generated heat. Preferably, the cooling collar 201 is S-shaped to increase the contact area with the stator 204.
Meanwhile, in order to transfer heat generated by the flywheel body 17 to the base 21, the upper side and the lower side of the flywheel body 17 are respectively connected with the base 21 through the upper auxiliary bearing 1 and the lower auxiliary bearing 12, and the upper auxiliary bearing 1 and the lower auxiliary bearing 12 can support the flywheel body 17 and realize rapid heat dissipation.
Therefore, the heat dissipation structure in the embodiment solves the heat dissipation problem of the stator and the rotor of the motor and the stator and the rotor of the magnetic suspension bearing, reduces the temperature of the motor and the magnetic bearing, and improves the reliability and the service life of the flywheel energy storage device.
It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "secured" are to be construed broadly, and thus, for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, the technical solutions of the embodiments of the present invention can be combined with each other, but it is necessary to use a person skilled in the art to realize the basis, and when the technical solutions are combined and contradictory to each other or cannot be realized, the combination of the technical solutions should not exist, and is not within the protection scope of the present invention.
Claims (10)
1. A heat radiation structure of a flywheel energy storage device is characterized by comprising:
frame (21), frame (21) be bilayer structure, including outer wall (301) and inner wall (303), outer wall (301) and inner wall (303) between be provided with runner (304), the inside wall of inner wall (303) on be provided with blackbody radiation material layer (305), runner (304) inner loop flow have coolant.
2. The heat dissipation structure of a flywheel energy storage device of claim 1, wherein: the flow channel (304) between the outer wall (301) and the inner wall (303) is formed by separating the flow channel ribs (302).
3. The heat dissipation structure for a flywheel energy storage device of claim 1, wherein: the outer side of the outer wall (301) is provided with a plurality of heat dissipation ribs (306).
4. The flywheel energy storage device is characterized by comprising a flywheel body (17), wherein the flywheel body (17) is arranged inside a base (21) of the heat dissipation structure of the flywheel energy storage device according to claim 1, upper supports (6) connected with the base (21) are arranged on two sides of the upper portion of the flywheel body (17), lower supports (8) connected with the base (21) are arranged on the lower portion of the flywheel body (17), stators (204) are respectively arranged on the upper supports (6) and the lower supports (8), cooling circular pipes (201) are arranged on the stators (204), and cooling media flow in the cooling circular pipes (201).
5. The flywheel energy storage device of claim 4, wherein: the flywheel comprises a flywheel body (17), a stator (204) and a rotor (13), wherein the stator (204) comprises an upper radial magnetic bearing stator (3) and an axial magnetic bearing stator (18) which are arranged on an upper bracket (6), and a lower radial bearing stator (15) and a motor stator (14) which are arranged on a lower bracket (8), the upper side wall of the flywheel body (17) is provided with upper radial magnetic bearing rotors (2) and axial magnetic bearing thrust discs (19) which are in one-to-one correspondence with the upper radial magnetic bearing stator (3) and the axial magnetic bearing stator (18), and the lower side wall of the flywheel body (17) is provided with lower radial magnetic bearing rotors (16) and motor rotors (13) which are in one-to-one correspondence with the lower radial bearing stator (15) and the motor stator (14);
the cooling ring pipe (201) comprises an upper cooling ring pipe (20) and a lower cooling ring pipe (11), the upper radial magnetic bearing stator (3) and the axial magnetic bearing stator (18) are connected with the upper cooling ring pipe (20), and the lower radial bearing stator (15) and the motor stator (14) are connected with the upper cooling ring pipe (20).
6. The flywheel energy storage device of claim 5, wherein: the upper cooling ring pipe (20) and the lower cooling ring pipe (11) are respectively connected with an upper cooling medium inlet (5) and a lower cooling medium inlet (10) on the machine base (21) through an upper collecting pipe (4) and a lower collecting pipe (9), the upper cooling medium inlet (5) and the lower cooling medium inlet (10) are simultaneously communicated with a flow channel (304) in the machine base (21), and a cooling medium outlet (7) is further arranged on the machine base (21).
7. The flywheel energy storage device of claim 4, wherein: the cooling ring pipe (201) is connected with the stator (204) in an interference fit manner.
8. The flywheel energy storage device of claim 4, wherein: the cooling ring pipe (201) is arranged at the yoke part of the stator (204) and is arranged along the circumferential direction.
9. The flywheel energy storage device of claim 4, wherein: the cooling ring pipe (201) is arranged in an S shape.
10. The flywheel energy storage device of claim 4, wherein: the upper side and the lower side of the flywheel body (17) are respectively connected with the engine base (21) through an upper auxiliary bearing (1) and a lower auxiliary bearing (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123001603.8U CN217883068U (en) | 2021-12-01 | 2021-12-01 | Heat radiation structure of flywheel energy storage device and flywheel energy storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123001603.8U CN217883068U (en) | 2021-12-01 | 2021-12-01 | Heat radiation structure of flywheel energy storage device and flywheel energy storage device |
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| CN217883068U true CN217883068U (en) | 2022-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123001603.8U Active CN217883068U (en) | 2021-12-01 | 2021-12-01 | Heat radiation structure of flywheel energy storage device and flywheel energy storage device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117559705A (en) * | 2023-11-10 | 2024-02-13 | 青岛东湖绿色节能研究院有限公司 | Flywheel energy storage device convenient for heat dissipation |
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2021
- 2021-12-01 CN CN202123001603.8U patent/CN217883068U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117559705A (en) * | 2023-11-10 | 2024-02-13 | 青岛东湖绿色节能研究院有限公司 | Flywheel energy storage device convenient for heat dissipation |
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