CN217159461U - Rotor heat dissipation assembly of flywheel energy storage unit - Google Patents
Rotor heat dissipation assembly of flywheel energy storage unit Download PDFInfo
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- CN217159461U CN217159461U CN202220744362.1U CN202220744362U CN217159461U CN 217159461 U CN217159461 U CN 217159461U CN 202220744362 U CN202220744362 U CN 202220744362U CN 217159461 U CN217159461 U CN 217159461U
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- 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
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Abstract
A rotor heat dissipation assembly of a flywheel energy storage unit comprises an emission ring and an absorption ring which are arranged above a rotor, wherein the emission ring is of a cylindrical structure with a flange, the emission ring is fixedly sleeved on a flywheel shaft, the lower end face of the flange of the emission ring is in contact with the rotor, and the outer circular surface of the emission ring and the upper end face of the flange of the emission ring form a wavy heat radiation surface; the absorption ring is of a flanged cylindrical structure and is fixed on the inner wall of a shell of the flywheel energy storage system, a safety gap is reserved between the inner circular surface of the absorption ring and the outer circular surface of the emission ring, and a safety gap is reserved between the lower end surface of the absorption ring and the upper end surface of the flange of the emission ring. The utility model discloses possess special heat radiation structure and measure, can carry the external world with the heat that rotor work produced better, control the temperature rise of flywheel rotor effectively.
Description
Technical Field
The utility model belongs to flywheel energy storage system, concretely relates to flywheel energy storage unit's rotor cooling module.
Background
The flywheel energy storage unit realizes the interconversion of electric energy and mechanical energy through the motor stator and the rotor, and the motor rotor is integrally installed on the energy storage flywheel. To reduce wind friction losses, flywheel energy storage units typically operate within a sealed vacuum cavity formed by the housing. When the temperature exceeds the maximum working temperature which can be borne by the permanent magnet on the rotor of the permanent magnet motor, the magnetic performance of the permanent magnet can be irreversibly degraded, so that the performance of a flywheel energy storage system is seriously reduced. In the vacuum environment, heat can hardly be dissipated by air convection, so that heat dissipation of the rotor is very difficult, and it is very important to enhance the heat dissipation capability of the rotor by an unconventional means.
The existing rotor heat dissipation technology under vacuum has two types: one is to hollow the flywheel shaft and directly cool the rotor through a liquid or gas medium system; the other is that the flywheel is coated with radiation heat-dissipation coating, and the heat generated by the motor rotor is firstly conducted to the flywheel and then radiated to the shell through the surface of the flywheel.
The first method has the following defects: 1. the flywheel machining process is complex, and 2, an additional cooling system is needed in the system, so that the cost is high, and the overall energy conversion efficiency is reduced. The second method has the following defects: the heat transfer path is long, the transfer efficiency is low, and the heat dissipation effect is not good.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a rotor cooling module of flywheel energy storage unit possesses special heat radiation structure and measure, can carry the external world with the heat that rotor work produced betterly, controls the temperature rise of flywheel rotor effectively.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a rotor heat dissipation assembly of a flywheel energy storage unit comprises an emission ring and an absorption ring which are arranged above a rotor, wherein the emission ring is of a cylindrical structure with a flange, the emission ring is fixedly sleeved on a flywheel shaft, the lower end face of the flange of the emission ring is in contact with the rotor, and the outer circular surface of the emission ring and the upper end face of the flange of the emission ring form a wavy heat radiation surface; the absorption ring is of a flanged cylindrical structure and is fixed on the inner wall of a shell of the flywheel energy storage system, a safety gap is reserved between the inner circular surface of the absorption ring and the outer circular surface of the emission ring, and a safety gap is reserved between the lower end surface of the absorption ring and the upper end surface of the flange of the emission ring.
The trough on the heat radiation surface is semicircular, and the crest is a straight line shape with filleted corners arranged at two ends.
And a heat-conducting coating is also arranged on the heat radiation surface.
And a plurality of screw through holes are uniformly distributed on the flange of the absorption ring and are used for fixing the absorption ring on the inner wall of the shell of the flywheel energy storage system by using screws.
And heat-conducting coatings are arranged on the outer circular surface and the lower end surface of the absorption ring.
The heat conducting coating is made of nano carbon powder paint or silicon carbide paint, and the thickness of the heat conducting coating is 0.05 mm-0.08 mm.
And the safety clearance between the outer circular surface of the transmitting ring and the inner circular surface of the absorbing ring is larger than the air gap of the motor stator and the motor rotor of the flywheel energy storage system.
The safety clearance between the lower end face of the absorption ring and the upper end face of the flange of the emission ring is larger than the air gap of the axial magnetic bearing of the flywheel energy storage system.
The principle of the utility model is that: the utility model discloses an emission ring is installed in electric motor rotor top to with electric motor rotor direct contact, the emission ring has two functions here, firstly replaces the last magnetic shield in the traditional scheme, has played the effect of magnetism and restriction electric motor rotor axial position, secondly absorbs the heat that electric motor rotor work produced, goes on transmitting the absorption ring through the mode of heat radiation. The wavy heat radiation face on the surface of the transmitting ring can increase the heat radiation area and is beneficial to improving the heat radiation efficiency, and the heat conductivity and the surface emissivity of the heat conduction coating on the heat radiation face are very high, so that the heat radiation efficiency is further improved. The absorption ring is made of heat conducting materials, and after the heat conducting coating is arranged on the surface of the absorption ring, the absorption ring is favorable for absorbing heat of the emission ring and conducting the heat to the shell with lower temperature, so that the difficulty of vacuum convection-free heat transfer is overcome, and the heat is transferred to the outside.
The utility model has the advantages that: the utility model discloses simple structure, material are common, realize easily and the cost is lower, and the radiating effect is better, can effectively restrain the rotor temperature rise. Carry out contrast experiment through the preparation model machine, the utility model provides a scheme can improve 18% -23% rotor heat exchange efficiency, reduces 6 ~ 8 ℃ rotor temperature rise.
Drawings
FIG. 1 is a schematic view of the assembly of the present invention on a flywheel energy storage unit;
FIG. 2 is an enlarged view of a portion of FIG. 1;
fig. 3 is a cross-sectional view of a launch ring according to the present invention;
FIG. 4 is a cross-sectional view of an absorbent ring according to the present invention;
the labels in the figure are: 1. flywheel shaft, 2, motor rotor, 3, emission ring, 4, absorption ring, 5, lower magnetic isolation plate, 6, flywheel, 7, heat radiation surface, 8, emission ring flange, 9, trough, 10, wave crest, 11, absorption ring flange.
Detailed Description
The following detailed description of the present invention is provided with reference to the accompanying drawings and examples, but not to be construed as limiting the present invention in any way.
Fig. 1 and 2 show the assembly schematic diagram of the present invention on the flywheel energy storage unit, wherein fig. 2 is right the assembly position of the transmitting ring and the absorbing ring of the present invention is enlarged, so as to be right the structure and the working principle of the present invention are understood.
Referring to fig. 1-4, a rotor heat dissipation assembly of a flywheel energy storage unit comprises a transmitting ring 3 and an absorbing ring 4 which are matched with each other, wherein the transmitting ring 3 is a cylinder structure with a flange, the inner circular surface of the transmitting ring 3 is assembled on a flywheel shaft 1 of the flywheel energy storage unit in an interference fit manner, and is positioned above the motor rotor 2, the lower end surface of the transmitting ring flange 8 is directly contacted with the upper end surface of the motor rotor 2, at this time, the transmitting ring flange 8 can be used as an upper magnetic isolation plate of the motor rotor 2 and has the function of the upper magnetic isolation plate, the outer circular surface of the transmitting ring 3 and the upper end surface of the transmitting ring flange 8 form a continuous wave-shaped heat radiation surface 7, the wave trough 9 is semicircular, the wave crest 10 is in a linear shape with round corners at two ends, the processing is facilitated, the heat radiation area of the surface of the emission ring 3 can be increased as much as possible, and the heat radiation efficiency is improved; the absorption ring 4 and the emission ring 3 are matched for use, the absorption ring 4 is also of a cylinder structure with a flange, a plurality of screw through holes are uniformly distributed on the absorption ring flange 11 along the circumference, during assembly, the absorption ring flange 11 fixes the absorption ring 4 on the inner wall of the shell of the flywheel energy storage unit through screws, the inner circular surface of the absorption ring 4 surrounds the outer circular surface of the emission ring 3, a safety gap with a certain width is reserved between the inner circular surface of the absorption ring 4 and the outer circular surface of the emission ring 3, and the width value of the safety gap is larger than the air gap of a motor stator and a rotor of the flywheel energy storage unit; a safety gap with a certain width is also reserved between the lower end face of the absorption ring 4 and the upper end face of the emission ring flange 8, and the width value of the safety gap is larger than the axial magnetic bearing air gap of the flywheel energy storage unit.
In order to further improve the efficiency of heat radiation and conduction of the emission ring 3 and the absorption ring 4, the emission ring 3 and the absorption ring 4 are both required to be made of materials with higher heat conductivity coefficients, such as aluminum and copper, and the emission ring 3 is also required to have enough structural strength while having high heat conductivity under the action of centrifugal force considering that the emission ring 3 is directly arranged on the flywheel shaft 1, rotates with the flywheel 6 at high speed and is manufactured by 6 series or 7075 aluminum alloy; the absorption ring 4 is fixed on the shell, and the requirement on the strength of the absorption ring is not high, so that the absorption ring can be made of red copper or brass.
Furthermore, in another embodiment of the present invention, the heat radiation surface 7 of the emission ring 3 and the outer surface of the absorption ring 4 can be coated with a heat conductive coating, so as to further improve the ability of radiation heat dissipation and facilitate the absorption ring 4 to absorb the heat of the emission ring 3 and conduct the heat to the lower temperature housing. Specifically, the heat conducting coating is made of nano carbon powder paint or silicon carbide paint, and the thickness of the heat conducting coating is 0.05 mm-0.08 mm.
The above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and it should be understood by those of ordinary skill in the art that the embodiments of the present invention can be modified or replaced with equivalents with reference to the above embodiments, and any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are all within the scope of the claims of the present application.
Claims (8)
1. The utility model provides a rotor cooling module of flywheel energy storage unit which characterized in that: the transmission ring is of a cylindrical structure with a flange, the transmission ring is fixedly sleeved on a flywheel shaft, the lower end face of the flange of the transmission ring is contacted with the rotor, and the outer circular surface of the transmission ring and the upper end face of the flange of the transmission ring form a wavy heat radiation surface; the absorption ring is of a flanged cylindrical structure and is fixed on the inner wall of a shell of the flywheel energy storage system, a safety gap is reserved between the inner circular surface of the absorption ring and the outer circular surface of the emission ring, and a safety gap is reserved between the lower end surface of the absorption ring and the upper end surface of the flange of the emission ring.
2. The rotor heat sink assembly of a flywheel energy storage unit of claim 1, wherein: the wave trough on the heat radiation surface is semicircular, and the wave crest is a straight line shape with round corners at two ends.
3. The rotor heat sink assembly of a flywheel energy storage unit of claim 1, wherein: and a heat-conducting coating is also arranged on the heat radiation surface.
4. The rotor heat sink assembly of a flywheel energy storage unit of claim 1, wherein: and a plurality of screw through holes are uniformly distributed on the flange of the absorption ring and are used for fixing the absorption ring on the inner wall of the shell of the flywheel energy storage system by using screws.
5. The rotor heat sink assembly of a flywheel energy storage unit of claim 1, wherein: and heat-conducting coatings are arranged on the outer circular surface and the lower end surface of the absorption ring.
6. A rotor heat sink assembly for a flywheel energy storage unit as claimed in claim 3 or 5, wherein: the heat conducting coating is made of nano carbon powder paint or silicon carbide paint, and the thickness of the heat conducting coating is 0.05 mm-0.08 mm.
7. The rotor heat sink assembly of a flywheel energy storage unit of claim 1, wherein: and the safety clearance between the outer circular surface of the transmitting ring and the inner circular surface of the absorbing ring is larger than the air gap of the motor stator and the motor rotor of the flywheel energy storage system.
8. The rotor heat sink assembly of a flywheel energy storage unit of claim 1, wherein: the safety clearance between the lower end face of the absorption ring and the upper end face of the flange of the emission ring is larger than the air gap of the axial magnetic bearing of the flywheel energy storage system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220744362.1U CN217159461U (en) | 2022-04-01 | 2022-04-01 | Rotor heat dissipation assembly of flywheel energy storage unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220744362.1U CN217159461U (en) | 2022-04-01 | 2022-04-01 | Rotor heat dissipation assembly of flywheel energy storage unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217159461U true CN217159461U (en) | 2022-08-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220744362.1U Active CN217159461U (en) | 2022-04-01 | 2022-04-01 | Rotor heat dissipation assembly of flywheel energy storage unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217159461U (en) |
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2022
- 2022-04-01 CN CN202220744362.1U patent/CN217159461U/en active Active
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