CN111327145A - Flywheel energy storage device with novel structure for realizing bearing lubrication and heat dissipation by using gas circulation - Google Patents
Flywheel energy storage device with novel structure for realizing bearing lubrication and heat dissipation by using gas circulation Download PDFInfo
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- CN111327145A CN111327145A CN201911326281.9A CN201911326281A CN111327145A CN 111327145 A CN111327145 A CN 111327145A CN 201911326281 A CN201911326281 A CN 201911326281A CN 111327145 A CN111327145 A CN 111327145A
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- helium
- energy storage
- flywheel
- storage device
- flywheel energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/163—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at only one end of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/02—Additional mass for increasing inertia, e.g. flywheels
- H02K7/025—Additional mass for increasing inertia, e.g. flywheels for power storage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention provides a flywheel energy storage device with a new structure for realizing bearing lubrication and heat dissipation by using gas circulation, which mainly comprises a flywheel energy storage device and equipment for realizing bearing lubrication and heat dissipation by using helium circulation, wherein a certain amount of helium is filled in a vacuum chamber of the flywheel energy storage device, a motor is used for driving a flywheel to rotate at a high speed, a helium vacuum pump is used for pumping out the helium in the vacuum chamber, so that the interior of the device is in a negative pressure state, an equipment operation environment with low wind resistance is manufactured, heat generated during the operation of the equipment is taken away, then the taken heat is released by a radiating fin, high-pressure helium is generated by a helium compressor, and the heat dissipation of frequent charging and discharging of the flywheel is provided by matching with an air bearing. The invention realizes that the helium gas is utilized to realize that the gas and air flotation composite bearing enables the flywheel to rotate at higher speed, and the helium gas vacuum pump and the helium gas compressor are used for manufacturing the flywheel energy storage system which can not only keep the running environment of the device with low wind resistance, but also maintain good heat dissipation.
Description
Technical Field
The invention relates to the field of flywheel energy storage, in particular to a flywheel energy storage device with a new structure, which uses gas circulation to lubricate a bearing and dissipate heat.
Background
With the increase in the number of human beings and the change in human survival patterns, energy problems have become an important issue. In order to fully utilize the existing energy while developing new energy, human beings need to develop advanced energy storage technology. Among a plurality of energy storage technologies, the flywheel energy storage system has the advantages of high energy storage density, high energy conversion rate, long service life, short charging time, environmental friendliness and the like, and can be widely applied to the fields of uninterrupted UPS power supply, aerospace, electric vehicles, electric power and the like.
Flywheel energy storage is applied to new energy automobiles for a long time, and along with the gradual development of renewable energy, the contradiction of unbalanced power supply and demand becomes more obvious. The energy storage technology can provide powerful support for aspects such as peak regulation of a renewable energy power grid and improvement of electric energy quality, improve the consumption level of renewable energy, promote the gradual conversion from traditional fossil energy to renewable energy, and realize new development of energy industry
At present, the electric energy storage technology comprises water pumping energy storage, compressed air energy storage, flywheel energy storage, storage battery energy storage, superconducting magnetic energy, super capacitor and the like. The flywheel energy storage has the characteristics of high efficiency (84-96%), fast response, high power, long service life, cleanness, no pollution and the like, and is mainly applied to the fields of electric automobiles, smart grid/distributed grid frequency modulation and amplitude modulation, high-quality power supplies, aviation, aerospace, rail transit energy recovery and the like. With the gradual improvement of flywheel energy storage technology, it will become one of the most promising energy storage technologies at present.
A great deal of research and application are carried out at home and abroad aiming at the flywheel energy storage technology. At present, aiming at the existing flywheel energy storage system developed by commercial application or prototype, the scale of the foreign low-speed flywheel energy storage single machine is as follows: 3MW, 60MJ, 7700 r/min; the scale of the domestic low-speed flywheel energy storage single machine is as follows: 1MW, 60MJ, 8000 r/min. The foreign high-speed flywheel energy storage scale is as follows: 333kW, 90MJ, 52000 r/min; the domestic high-speed flywheel energy storage scale is as follows: 300kW, 36MJ, 16000 r/min. With the increasing development of flywheel energy storage technology, the characteristics of high power, high rotation speed, short-time high-frequency charge and discharge, high vacuum and the like cause the flywheel energy storage system to face severe heat dissipation requirements. In particular, each rotor of the flywheel energy storage system is affected by phase harmonics, and induced currents are generated at the magnetic poles of the rotors, which cause temperature rise. Because each rotor of the flywheel energy storage system is in a vacuum and magnetic suspension state, the heat is difficult to be led out. In order to prevent the rotor from being over-heated, the enhanced heat dissipation of the rotor under the vacuum condition is a problem worthy of research.
Disclosure of Invention
The invention aims to provide a flywheel energy storage device with a new structure, which uses gas circulation to lubricate a bearing and dissipate heat, and can effectively solve the problem that the flywheel energy storage device can work at a high-speed rotary dumping energy and simultaneously solve the problem of difficult system heat dissipation, so that a flywheel system can be charged and discharged at a high frequency, and the operation efficiency and the reliability are improved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the novel-structure flywheel energy storage device comprises a flywheel energy storage device, wherein the flywheel energy storage device comprises a flywheel body, a starting/power generator, a vacuum chamber, a gas bearing, a pneumatic floating disc and a power converter, the device further comprises a helium circulating system, the helium circulating system comprises a helium vacuum pump, a radiating fin and a helium compressor which are sequentially connected, the input end of the helium vacuum pump is connected to the vacuum chamber, and the output end of the helium compressor is connected to the air bearing and the pneumatic floating disc. By using the helium circulating system, a helium vacuum pump and a helium compressor are used for manufacturing the flywheel energy storage device which can keep the running environment of the device with low wind resistance and can also keep good heat dissipation.
According to the invention, a certain amount of helium is filled in the vacuum chamber of the flywheel energy storage device, the motor is utilized to drive the flywheel to rotate at a high speed, the helium vacuum pump is used for pumping out the helium in the vacuum chamber, so that the interior of the device is in a negative pressure state, the equipment operation environment with low wind resistance is manufactured, meanwhile, heat generated during the operation of the equipment is taken away, then the taken-away heat is released out through the radiating fins, high-pressure helium is generated through the helium compressor, and the heat is matched with the air bearing and the pneumatic floating disc to provide the heat radiation of frequent charging and discharging of the flywheel. The invention realizes that the helium circulating system is utilized, the helium is utilized to realize that the gas and air floatation composite bearing enables the flywheel to rotate at higher speed, and the helium vacuum pump and the helium compressor are used for manufacturing the flywheel energy storage system which can not only keep the running environment of the device with low wind resistance, but also maintain good heat dissipation.
In the flywheel energy storage device with the novel structure for realizing bearing lubrication and heat dissipation by using gas circulation, the motor/generator is a permanent magnet brushless motor, and the flywheel energy storage device is simple in structure, low in cost, wide in constant-power speed regulation range and high in efficiency under various conditions.
In the working method of the flywheel energy storage device with the new structure for realizing bearing lubrication and heat dissipation by using gas circulation, the helium in the vacuum chamber is pumped out by the low wind resistance operating environment and the heat dissipation system of the flywheel energy storage device through the helium vacuum pump, the heat generated by the system is continuously taken away, the temperature of the helium is reduced through the radiator, and finally the cooled high-pressure helium is guided into the air floatation bearing and the pneumatic floating disc through the helium compressor, and the flywheel is supported and fixed, so that the operating resistance of the device is reduced.
In the working method of the flywheel energy storage device with the novel structure for realizing bearing lubrication and heat dissipation by using gas circulation, the helium vacuum pump and the helium compressor are used for simultaneously exhausting and inflating to enable the gas bearing to be installed in the vacuum chamber, and the flywheel adopts the gas and air floatation composite bearing to enable the flywheel to rotate at a higher speed, so that the energy storage density of the flywheel is greatly improved. The problem that a gas/air bearing cannot be used in a flywheel vacuum chamber is solved by simultaneously inflating and exhausting by using a helium vacuum pump and a helium compressor.
Compared with the prior art, the invention has the advantages that: the flywheel energy storage device can effectively solve the problems that a gas/air bearing cannot be used, bearing resistance and gas viscous resistance are effectively reduced, and the system is difficult to dissipate heat when the flywheel energy storage device works at a higher rotating speed, and meanwhile, the operation efficiency and the reliability are improved.
Drawings
FIG. 1 is a schematic structural diagram of a flywheel energy storage device with a new structure for lubricating a bearing and dissipating heat by using gas circulation in an embodiment of the present invention.
Detailed Description
The technical solution adopted by the present invention will be further explained with reference to the schematic drawings.
The embodiment of the invention provides a flywheel energy storage device (hereinafter referred to as the device) with a new structure for realizing bearing lubrication and heat dissipation by using gas circulation, which mainly comprises a flywheel energy storage device (an air bearing, a vacuum chamber, a motor/generator, a flywheel body and a pneumatic floating disc) and equipment (a helium vacuum pump, a heat radiator and a helium compressor) for realizing bearing lubrication and heat dissipation by using helium circulation, and the device is described in detail by combining with the figure 1.
Referring to fig. 1, the flywheel energy storage device with a new structure for realizing bearing lubrication and heat dissipation by using gas circulation comprises a flywheel energy storage device, the flywheel energy storage device comprises a flywheel body 1, a starting/generating machine 2, a vacuum chamber 3, a gas bearing 4, a pneumatic floating disc 5 and a power converter 6, the starting/generating machine 2 and the flywheel body 1 which are installed in the vacuum chamber 3 are coaxially installed, the top and the bottom of a rotor shaft of the starting/generating machine 2 are both provided with the gas bearing 4 (air bearing), the power converter 6 is connected with the starting/generating machine 2, the pneumatic floating disc 5 is installed on the rotor shaft and is positioned at the lower part of the flywheel body 1, the device also comprises a helium circulating system, and a flywheel energy storage device which can keep the running environment of the device with low wind resistance and can keep good heat dissipation is manufactured by using the helium circulating system, a helium vacuum pump and a helium compressor. The helium circulating system comprises a helium vacuum pump 7, a radiating fin 8 and a helium compressor 9 which are sequentially connected, wherein the input end of the helium vacuum pump is connected to the vacuum chamber, and the output end of the helium compressor is connected to the air bearing 4 and the pneumatic floating disc 5.
It is worth mentioning that the flywheel adopts the gas and air floatation composite bearing to enable the flywheel to rotate at a higher speed, so that the energy storage density of the flywheel is greatly improved, and meanwhile, the problem that the gas/air floatation bearing cannot be used in a flywheel vacuum chamber is solved by simultaneously inflating and exhausting by using a helium vacuum pump and a helium compressor.
The working principle of the device is as follows: when the flywheel energy storage device works, a certain amount of helium is filled into a vacuum chamber of a helium compressor through a gas/gas bearing, so that a rotating mechanism is in a gas floating state and a gas lubricating state, a flywheel driven by a motor rotates at a high speed, the rotating speed of the flywheel is 50000r/min, a helium vacuum pump simultaneously pumps out the helium in the vacuum chamber, the interior of the flywheel energy storage device is in a negative pressure state, an equipment operation environment with low wind resistance is manufactured, heat generated during equipment operation is taken away, the taken heat is released through a cooling fin, the cooled helium generates high-pressure helium through the helium compressor, and accordingly continuous and frequent charging and discharging heat dissipation of the flywheel energy storage device is achieved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, which are provided as exemplary embodiments and illustrative of the principles of the present invention, and that the present invention may be embodied in other specific forms without departing from the novel concepts of the present invention and within the scope of the appended claims. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The novel-structure flywheel energy storage device for achieving bearing lubrication and heat dissipation through gas circulation comprises a flywheel energy storage device, wherein the flywheel energy storage device comprises a flywheel body, a starting/power generator, a vacuum chamber, a gas bearing, a pneumatic floating disc and a power converter.
2. The flywheel energy storage device of new construction using gas circulation for lubrication of bearings and heat dissipation of claim 1, wherein said motor/generator is a permanent magnet brushless motor.
3. The working method of the flywheel energy storage device with the new structure for realizing the lubrication and the heat dissipation by using the gas circulation as claimed in any one of claims 1 to 2 is characterized in that the low wind resistance operating environment and the heat dissipation system of the flywheel energy storage device pump out helium in the vacuum chamber through a helium vacuum pump, continuously take away heat generated by the system, reduce the temperature of the helium through a radiator, finally guide the cooled high-pressure helium into the air bearing and the pneumatic floating disc through a helium compressor, support and fix the flywheel, and reduce the operating resistance of the device.
4. The method of claim 3 wherein the helium vacuum pump and the helium compressor are used to simultaneously pump and pump air to install the gas bearing in the vacuum chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911326281.9A CN111327145A (en) | 2019-12-20 | 2019-12-20 | Flywheel energy storage device with novel structure for realizing bearing lubrication and heat dissipation by using gas circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911326281.9A CN111327145A (en) | 2019-12-20 | 2019-12-20 | Flywheel energy storage device with novel structure for realizing bearing lubrication and heat dissipation by using gas circulation |
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| Publication Number | Publication Date |
|---|---|
| CN111327145A true CN111327145A (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911326281.9A Pending CN111327145A (en) | 2019-12-20 | 2019-12-20 | Flywheel energy storage device with novel structure for realizing bearing lubrication and heat dissipation by using gas circulation |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1750364A (en) * | 2005-10-13 | 2006-03-22 | 西安交通大学 | High pressure gas support flying wheel battery |
| CN107658101A (en) * | 2017-11-03 | 2018-02-02 | 宁波奉化飞天人精密模具设计有限公司 | A kind of height warm area differentiation power transformer cooling device |
| CN108242817A (en) * | 2016-12-27 | 2018-07-03 | 安阳市凯创科技有限公司 | A kind of flywheel energy storage standby ac power supply apparatus |
| CN209029342U (en) * | 2018-12-03 | 2019-06-25 | 德淮半导体有限公司 | Gas circulation unit and semiconductor board |
| CN110319002A (en) * | 2019-06-25 | 2019-10-11 | 珠海格力电器股份有限公司 | Compressor with a compressor housing having a plurality of compressor blades |
-
2019
- 2019-12-20 CN CN201911326281.9A patent/CN111327145A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1750364A (en) * | 2005-10-13 | 2006-03-22 | 西安交通大学 | High pressure gas support flying wheel battery |
| CN108242817A (en) * | 2016-12-27 | 2018-07-03 | 安阳市凯创科技有限公司 | A kind of flywheel energy storage standby ac power supply apparatus |
| CN107658101A (en) * | 2017-11-03 | 2018-02-02 | 宁波奉化飞天人精密模具设计有限公司 | A kind of height warm area differentiation power transformer cooling device |
| CN209029342U (en) * | 2018-12-03 | 2019-06-25 | 德淮半导体有限公司 | Gas circulation unit and semiconductor board |
| CN110319002A (en) * | 2019-06-25 | 2019-10-11 | 珠海格力电器股份有限公司 | Compressor with a compressor housing having a plurality of compressor blades |
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Application publication date: 20200623 |
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