CN218958725U - Flywheel energy storage unit and system - Google Patents
Flywheel energy storage unit and system Download PDFInfo
- Publication number
- CN218958725U CN218958725U CN202222827669.0U CN202222827669U CN218958725U CN 218958725 U CN218958725 U CN 218958725U CN 202222827669 U CN202222827669 U CN 202222827669U CN 218958725 U CN218958725 U CN 218958725U
- Authority
- CN
- China
- Prior art keywords
- energy storage
- cooling
- storage unit
- flywheel
- heat pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The application discloses flywheel energy storage unit, including casing and flywheel, the flywheel is located the casing, and the pivot of flywheel passes through the bearing to be connected with the casing, still includes: the cooling groove is connected with the shell, an opening of the cooling groove faces to one end of the rotating shaft sleeve, which is provided with the bearing, and cooling liquid is arranged in the cooling groove; one end of the heat pipe is used for being connected with the rotating shaft, the other end of the heat pipe is positioned in the cooling groove, and the heat pipe is used for transferring heat of the rotating shaft to one end of the heat pipe positioned in the cooling groove. When the flywheel energy storage unit works, the rotating shaft runs at a high speed, a large amount of heat can be generated by the rotating shaft, the rotating shaft can radiate heat through the heat pipe, meanwhile, the rotating shaft carries the heat pipe to rotate so as to stir the cooling liquid in the cooling tank, the heat pipe and the cooling liquid form forced convection heat exchange, and the cooling liquid and the cooling tank also form forced convection heat exchange, so that the heat radiation effect of the rotating shaft and the bearing can be improved, and the running safety performance of the flywheel energy storage unit is further improved.
Description
Technical Field
The application relates to the technical field of flywheel energy storage, in particular to a flywheel energy storage unit and a flywheel energy storage system.
Background
The flywheel energy storage system mainly comprises a high-speed rotating flywheel body, a motor/generator, a controller and a power electronic conversion device, wherein the flywheel body and the motor/generator are supported by magnetic suspension bearings and are sealed in a vacuum device.
The working principle of the flywheel energy storage system is as follows: when the energy provided by the power grid is higher than the energy required by the load, the flywheel energy storage system works in a charging state, and the controller controls the motor to drive the flywheel to rotate, so that the electric energy is converted into mechanical energy to be stored; when the energy provided by the power grid is lower than the energy required by the load, the flywheel works in a power generation state under the control of the controller, and the mechanical energy is converted into electric energy which is supplied to the load after power conversion.
Because the inside of the flywheel energy storage system is in a vacuum environment, the heat dissipation performance of the bearing below the flywheel is poor, the bearing loss is high, the temperature is continuously increased under the high-speed working condition, and when the temperature reaches the bearing temperature bearing limit, the problem of burnout and bonding is easy to occur, so that the supporting function of the bearing is invalid, and the normal work of the flywheel energy storage system is affected.
The existing heat dissipation device can only conduct radial heat conduction of the outer ring of the bearing and radiate heat on the surface of the bearing, and cannot meet the heat dissipation requirement of high-speed heavy loads.
Disclosure of Invention
An object of the present application is to provide a flywheel energy storage unit, which can improve the heat dissipation effect of a rotating shaft and a bearing, and another object is to provide a flywheel energy storage system including the flywheel energy storage unit.
In order to achieve the above purpose, the present application provides the following technical solutions:
the utility model provides a flywheel energy storage unit, includes casing and flywheel, and the flywheel is located the casing, and the pivot of flywheel passes through the bearing to be connected with the casing, still includes:
the cooling groove is connected with the shell, the opening of the cooling groove faces one end of the rotating shaft sleeve provided with the bearing, and cooling liquid is arranged in the cooling groove;
one end of the heat pipe is used for being connected with the rotating shaft, the other end of the heat pipe is positioned in the cooling groove, and the heat pipe is used for transferring heat of the rotating shaft to one end of the heat pipe positioned in the cooling groove;
when the rotating shaft rotates, the heat pipe is carried to rotate so as to stir the cooling liquid in the cooling tank.
According to some embodiments of the present application, the opening of the cooling tank is provided with a baffle, and the baffle is provided with a through hole for the heat supply pipe to extend into the cooling tank.
According to some embodiments of the application, a cylinder is arranged in the cooling groove, the lower end of the cylinder is connected to the bottom surface in the cooling groove, the lower end of the heat pipe extends into the cylinder from the upper end of the cylinder, the side wall of the upper end of the cylinder is provided with a liquid outlet, and the side wall of the lower end of the cylinder is provided with a liquid inlet;
the liquid level of the cooling liquid is higher than the liquid inlet and lower than the liquid outlet in a static state.
According to some embodiments of the present application, a plurality of liquid outlets are uniformly arranged on the side wall of the upper end of the cylinder body along the circumferential direction, and a plurality of liquid inlets are uniformly arranged on the side wall of the lower end of the cylinder body along the circumferential direction.
According to some embodiments of the present application, the bottom of the cylinder is provided with a chassis, the outer diameter of which is larger than the outer diameter of the cylinder, and the chassis is fixedly connected to the bottom surface of the cooling tank.
According to some embodiments of the present application, the flywheel energy storage unit further comprises a heat dissipating water jacket sleeved outside the bearing.
According to some embodiments of the application, the flywheel energy storage unit further comprises a base connected to the shell, the base is sleeved outside the radiating water sleeve, the cooling groove is connected to the base, and a channel extending out of the heating pipe is arranged on the base.
According to some embodiments of the application, the base is provided with a water inlet hole for the water inlet end of the heat dissipation water jacket to be led in and a water outlet hole for the water outlet end to be led out.
The flywheel energy storage system comprises a flywheel controller and further comprises any one of the flywheel energy storage units, and the flywheel controller is connected with the flywheel energy storage units and used for controlling charge and discharge of the flywheel energy storage units.
Compared with the prior art, the technical scheme has the following advantages:
according to the flywheel energy storage unit and the flywheel energy storage system, when the rotating shaft rotates, the rotating shaft can carry the heat pipe to rotate, working media inside the heat pipe can be attached to the pipe wall due to centrifugal force and rise along with the rotating speed, the working media attach to the wall surface to form rotating fluid, so that the convection heat exchange rate of the wall surface and the working media is increased, a large amount of heat in the rotating shaft is absorbed, the working media absorb the heat, when the temperature rises to reach a boiling point, steam is generated, a large amount of heat is taken away, the upper air pressure after boiling is larger than the lower air pressure, the steam moves downwards to the lower end of the heat pipe due to the existence of upper air pressure difference and lower air pressure difference, the lower end of the heat pipe rotates at a high speed to stir cooling liquid in the cooling groove, the heat pipe and the cooling liquid form forced convection heat exchange, and the cooling liquid and the cooling groove form forced convection heat exchange, so that the heat dissipation effect of the rotating shaft and the bearing can be improved, and the running safety performance of the flywheel energy storage unit is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings may be obtained according to the provided drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic structural diagram of a flywheel energy storage unit according to an embodiment of the present disclosure;
fig. 2 is an enlarged view of area a in fig. 1.
The reference numerals are as follows:
1 is a shell, 2 is a flywheel, 3 is a rotating shaft, 4 is a bearing, 5 is a cooling groove, 51 is a baffle, 511 is a through hole, 6 is a heat pipe, 7 is a cylinder, 71 is a liquid outlet, 72 is a liquid inlet, 73 is a chassis, 8 is a radiating water sleeve, 9 is a base, and 91 is a channel.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a flywheel energy storage unit according to an embodiment of the present application; fig. 2 is an enlarged view of area a in fig. 1.
The embodiment of the application provides a flywheel energy storage unit, including casing 1 and flywheel 2, flywheel 2 is located casing 1, and flywheel 2's pivot 3 passes through bearing 4 to be connected with casing 1, still includes: the cooling device comprises a cooling tank 5 and a heat pipe 6, wherein the cooling tank 5 is connected with a shell 1, an opening of the cooling tank 5 faces one end of a rotating shaft 3, which is sleeved with a bearing 4, cooling liquid is arranged in the cooling tank 5, and the cooling tank 5 is preferably of a cylindrical structure; one end of the heat pipe 6 is used for being connected with the rotating shaft 3, preferably by being connected with the rotating shaft 3 in an interference fit mode, the other end of the heat pipe 6 is located in the cooling groove 5, and the heat pipe 6 is used for transferring heat of the rotating shaft 3 to one end of the heat pipe located in the cooling groove 5. When the flywheel 2 energy storage unit works, due to the high-speed operation of the rotating shaft 3, the rotating shaft 3 and the bearing 4 can generate a large amount of heat, when the rotating shaft 3 rotates, the rotating shaft 3 can carry the heat pipe 6 to rotate, working medium inside the heat pipe 6 can be attached to the pipe wall due to centrifugal force and can be lifted along with the rotation speed, the working medium is attached to the wall surface to form rotating fluid, so that the convection heat exchange rate of the wall surface and the working medium is increased, a large amount of heat in the rotating shaft 3 is absorbed, the temperature of the working medium is lifted, the working medium with the boiling point of 100 ℃ can be selected, steam is generated when the working medium reaches the boiling point, a large amount of heat is taken away, the upper air pressure after boiling is larger than the lower air pressure, the steam moves downwards to the lower end of the heat pipe 6 due to the existence of the upper air pressure difference and lower air pressure difference, the lower end of the heat pipe 6 rotates at a high speed to stir cooling liquid in the cooling tank 5, the forced convection heat exchange is formed between the heat pipe 6 and the cooling liquid and the cooling tank 5, and the forced convection heat exchange is also formed by the cooling liquid, so that the heat dissipation effect of the rotating shaft 3 and the bearing 4 can be improved, and the running safety performance of the flywheel 2 energy storage unit is improved.
In order to prevent the cooling liquid from splashing out of the cooling tank 5, a baffle plate 51 is arranged at the opening of the cooling tank 5, a through hole 511 is formed in the baffle plate 51, the heating pipe 6 stretches into the cooling tank 5, when the cooling liquid in the cooling tank 5 runs at a high speed, the condition that the liquid level rises under the action of centrifugal force can occur, and when the cooling liquid contacts with the bottom surface of the baffle plate 51, the cooling liquid can return downwards, namely, the cooling liquid running at a high speed can be refluxed through the baffle plate 51, so that the purpose of circulating reflux is realized, and the cooling liquid is preferably oil or other liquid capable of playing a role in cooling.
In some embodiments of the present application, a cylinder 7 is further disposed in the cooling tank 5, the lower end of the cylinder 7 is connected to the bottom surface of the cooling tank 5, the gap between the baffle 51 and the cylinder 7 is preferably 8-10 mm, the lower end of the heat pipe 6 extends into the cylinder 7 from the upper end of the cylinder 7, the gap between the heat pipe 6 and the cylinder 7 is preferably 3-4 mm, the side wall of the upper end of the cylinder 7 is provided with a liquid outlet 71, and the side wall of the lower end of the cylinder 7 is provided with a liquid inlet 72. The liquid level of the cooling liquid is higher than the liquid inlet 72 and lower than the liquid outlet 71 in the static state. When the heat pipe 6 agitates the cooling liquid, the liquid level of the cooling liquid in the cylinder 7 is higher than the liquid outlet 71 under the action of centrifugal force to flow out of the cylinder 7, and meanwhile, the cooling liquid between the cooling groove 5 and the cylinder 7 flows back into the cylinder 7 to realize the flow of the cooling liquid between the cylinder 7 and the outside of the cylinder 7, thereby improving the cooling effect, generating the circulation of the cooling liquid in the working mode, and preventing the oil loss of the flywheel 2 under high speed.
Wherein, evenly be equipped with a plurality of liquid outlets 71 along the circumferencial direction on the lateral wall of barrel 7 upper end, evenly be equipped with a plurality of inlet 72 along the circumferencial direction on the lateral wall of barrel 7 lower extreme, for example can evenly set up a plurality of liquid outlets 71 in same high position on the lateral wall of barrel 7 upper end, can evenly set up a plurality of inlet 72 in same high position on the lateral wall of barrel 7 lower extreme, the shape of inlet 72 and outlet 71 is the round hole preferably, the axis direction of outlet 71 and inlet 72 extends along the radial direction of barrel 7, can improve the circulation efficiency of coolant liquid in the cooling tank 5 through a plurality of outlet 71 and inlet 72, and then improve the radiating effect.
In this embodiment, in order to improve the stability of the connection of the cylinder 7 in the cooling tank 5, the bottom of the cylinder 7 is provided with a chassis 73, the outer diameter of the chassis 73 is larger than that of the cylinder 7, and the chassis 73 is fixedly connected to the bottom surface in the cooling tank 5. Wherein the chassis 73 is preferably a disc, the chassis 73 and the cylinder 7 are preferably of a unitary structure, and the chassis 73 can be fixed in the cooling tank 5 by screws or other fastening means.
In some embodiments of the present application, the flywheel energy storage unit further includes a heat dissipation water jacket 8 sleeved outside the bearing 4, where the heat dissipation water jacket 8 may be always cooled by water, so as to further improve the heat dissipation effect of the bearing 4.
In some embodiments of the application, flywheel energy storage unit still includes the base 9 of connecting in casing 1, the base 9 cover is established in the cooling water cover 8 outsides, cooling tank 5 connects in base 9, the upper end of cooling tank 5 is equipped with the flange of outside extension, the flange can be fixed on base 9 through the fastener, the upper end inboard of cooling tank 5 is equipped with the counter bore, baffle 51 is located the counter bore, be equipped with the passageway 91 that heating tube 6 stretched out on the base 9, wherein base 9 includes the body and is located the ring of body upper surface, the external diameter of ring is less than the external diameter of body, the body can be fixed in casing 1 bottom through the screw from bottom to top cross-under, the bottom of casing 1 is equipped with the mounting hole, the ring is installed in the mounting hole, cooling water cover 8 is located the ring.
Wherein, be equipped with the apopore that the inlet port that supplies the inlet end of heat dissipation water jacket 8 to introduce and the apopore that the play water end was drawn forth on the base 9, promptly when the cooling water is introduced and the in-process of drawing forth can also cool off base 9 to further improve the radiating effect.
The embodiment of the application also provides a flywheel energy storage system, which comprises a flywheel controller and the flywheel energy storage unit provided by any one of the embodiments, wherein the flywheel controller is connected with the flywheel energy storage unit and is used for controlling the charge and discharge of the flywheel energy storage unit, and the beneficial effects of the flywheel energy storage system are described with reference to the flywheel energy storage unit, and are not repeated herein.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The flywheel energy storage unit and the flywheel energy storage system provided by the application are described in detail above. Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.
Claims (9)
1. The utility model provides a flywheel energy storage unit, includes casing (1) and flywheel (2), flywheel (2) are located in casing (1), pivot (3) of flywheel (2) pass through bearing (4) with casing (1) are connected, its characterized in that still includes:
the cooling groove (5) is connected with the shell (1), an opening of the cooling groove (5) faces one end of the rotating shaft (3) sleeved with the bearing (4), and cooling liquid is arranged in the cooling groove (5);
one end of the heat pipe (6) is used for being connected with the rotating shaft (3), the other end of the heat pipe is positioned in the cooling groove, and the heat pipe (6) is used for transferring heat of the rotating shaft to one end of the heat pipe positioned in the cooling groove;
when the rotating shaft (3) rotates, the heat pipe (6) is carried to rotate so as to stir the cooling liquid in the cooling groove (5).
2. Flywheel energy storage unit according to claim 1, characterized in that a baffle (51) is arranged at the opening of the cooling tank (5), and a through hole (511) is arranged on the baffle (51) for the heat pipe (6) to extend into the cooling tank (5).
3. Flywheel energy storage unit according to claim 1 or 2, characterized in that a cylinder (7) is arranged in the cooling tank (5), the lower end of the cylinder (7) is connected to the bottom surface in the cooling tank (5), the lower end of the heat pipe (6) extends into the cylinder (7) from the upper end of the cylinder (7), the side wall of the upper end of the cylinder (7) is provided with a liquid outlet (71), and the side wall of the lower end of the cylinder (7) is provided with a liquid inlet (72);
the liquid level of the cooling liquid is higher than the liquid inlet (72) and lower than the liquid outlet (71) in a static state.
4. A flywheel energy storage unit according to claim 3, wherein a plurality of liquid outlets (71) are uniformly arranged on the side wall of the upper end of the cylinder (7) along the circumferential direction, and a plurality of liquid inlets (72) are uniformly arranged on the side wall of the lower end of the cylinder (7) along the circumferential direction.
5. A flywheel energy storage unit according to claim 3, characterized in that the bottom of the cylinder (7) is provided with a chassis (73), the outer diameter of the chassis (73) is larger than the outer diameter of the cylinder (7), and the chassis (73) is fixedly connected to the bottom surface in the cooling tank (5).
6. Flywheel energy storage unit according to claim 1, further comprising a cooling water jacket (8) arranged around the outside of the bearing (4).
7. The flywheel energy storage unit according to claim 6, further comprising a base (9) connected to the housing (1), wherein the base (9) is sleeved outside the heat dissipating water jacket (8), the cooling tank (5) is connected to the base (9), and a channel (91) for the heat pipe (6) to extend is provided on the base (9).
8. The flywheel energy storage unit according to claim 7, characterized in that the base (9) is provided with a water inlet hole for the water inlet end of the heat dissipating water jacket (8) to be led in and a water outlet hole for the water outlet end to be led out.
9. A flywheel energy storage system comprising a flywheel controller, further comprising a flywheel energy storage unit according to any one of claims 1 to 8, the flywheel controller being connected to the flywheel energy storage unit and being configured to control charging and discharging of the flywheel energy storage unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222827669.0U CN218958725U (en) | 2022-10-26 | 2022-10-26 | Flywheel energy storage unit and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222827669.0U CN218958725U (en) | 2022-10-26 | 2022-10-26 | Flywheel energy storage unit and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218958725U true CN218958725U (en) | 2023-05-02 |
Family
ID=86110186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222827669.0U Active CN218958725U (en) | 2022-10-26 | 2022-10-26 | Flywheel energy storage unit and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218958725U (en) |
-
2022
- 2022-10-26 CN CN202222827669.0U patent/CN218958725U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105464996B (en) | Electronic liquid pump | |
| CN209375320U (en) | A kind of servo motor water cooling plant | |
| CN113364185A (en) | Flywheel energy storage rotor heat dissipation mechanism | |
| CN204258598U (en) | A kind of radiator structure of power cell and rack | |
| CN113489231A (en) | Magnetic suspension flywheel energy storage system using liquid cooling heat dissipation technology | |
| CN212806624U (en) | Double-fan energy-saving cooling tower with cooling tank | |
| CN112901533B (en) | Phase-change cooling type permanent magnet direct-drive air blower | |
| CN218958725U (en) | Flywheel energy storage unit and system | |
| CN217883068U (en) | Heat radiation structure of flywheel energy storage device and flywheel energy storage device | |
| CN114094765B (en) | Water-cooling structure of motor | |
| CN109088504B (en) | Magnetic suspension motor device with high heat dissipation performance | |
| CN111124087A (en) | CPU water-cooling power device | |
| CN217562337U (en) | Inductor capable of effectively reducing working temperature rise | |
| CN216904554U (en) | Flywheel motor rotor cross-fork type heat dissipation structure and flywheel motor | |
| CN116566121A (en) | Motor cooling structure of air suspension centrifugal fan | |
| CN206180778U (en) | In -wheel motor intracavity spray cooling heat radiation structure | |
| CN212304422U (en) | Comprehensive compensation power distribution cabinet | |
| CN209283031U (en) | A kind of AC frequency conversion traction auxiliary motor | |
| CN219918647U (en) | Hydroelectric power generation group cooling device | |
| CN218953660U (en) | Cooling device of circulating pump | |
| CN214154275U (en) | Motor casing with good heat dissipation | |
| CN212250350U (en) | Tower barrel heat dissipation system of wind driven generator | |
| CN220873371U (en) | Magnetic control energy-saving equipment for environmental protection engineering | |
| CN214255322U (en) | Secondary equipment cabinet heat abstractor of transformer substation | |
| CN117559705B (en) | Flywheel energy storage device convenient for heat dissipation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |