CN114567119B - Flywheel anti-impact rotary mechanism for flywheel energy storage system - Google Patents
Flywheel anti-impact rotary mechanism for flywheel energy storage system Download PDFInfo
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- CN114567119B CN114567119B CN202210339575.0A CN202210339575A CN114567119B CN 114567119 B CN114567119 B CN 114567119B CN 202210339575 A CN202210339575 A CN 202210339575A CN 114567119 B CN114567119 B CN 114567119B
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- flywheel
- energy storage
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- 238000004146 energy storage Methods 0.000 title claims abstract description 35
- 230000007246 mechanism Effects 0.000 title claims abstract description 28
- 238000005096 rolling process Methods 0.000 claims description 15
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
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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
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/007—Systems for storing electric energy involving storage in the form of mechanical energy, e.g. fly-wheels
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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
Abstract
The flywheel anti-impact rotating mechanism for the flywheel energy storage system is arranged at two axial ends of a flywheel body of the flywheel energy storage system and comprises an annular fixed disc and an annular rotating disc, wherein the annular fixed disc and the annular rotating disc can rotate relatively; one surface of the rotating disk, which faces the flywheel body, protrudes out of the fixing part of the fixing disk, and one surface of the rotating disk, which faces away from the flywheel body, is lower than the ring surface of the fixing part of the fixing disk. The invention can effectively solve the problem of impact heat damage of the flywheel under extremely special working conditions, ensures the running safety performance of the flywheel with MW level, and is beneficial to the challenge of the flywheel energy storage system to high performance.
Description
Technical Field
The invention belongs to the field of flywheel energy storage systems, and particularly relates to a flywheel anti-impact rotating mechanism for a flywheel energy storage system.
Background
The flywheel energy storage system mainly comprises three parts: the high-speed rotation flywheel comprises a 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 system is as follows: when the energy provided by the power grid is higher than the energy required by the load, the flywheel 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 and 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.
The flywheel body in the flywheel energy storage system is heavy, for large energy storage types, the weight is as high as 80000N, and the flywheel body is mainly unloaded and supported by a magnetic suspension bearing, and a small part is supported by a lower mechanical bearing. Under normal working conditions, the performance requirements of long service life and low loss of the lower mechanical bearing can be guaranteed, but under extreme special working conditions (larger vibration or power system fault), the flywheel body can rotate upwards or downwards at full gravity to impact the mechanical bearing at high speed, and the energy storage type of the flywheel body at MW level is especially serious due to larger load of the flywheel body and faster rotating speed, so that the upper/lower mechanical bearing can be impacted and overheated to be damaged, and therefore the impact prevention structure of the flywheel energy storage system plays a vital role in realizing the impact resistance of the flywheel energy storage system. At present, the flywheel motor stator mounting structure only has an axial magnetic bearing, and the shock resistance completely depends on a lower mechanical bearing, but the lower mechanical bearing cannot be too large due to the temperature rise requirement of the bearing, and the shock resistance requirement cannot be met on the premise of meeting the thermal performance requirement.
Disclosure of Invention
The invention aims to provide a flywheel anti-impact rotating mechanism for a flywheel energy storage system, which meets the impact resistance requirement.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the flywheel anti-impact rotating mechanism is arranged at two axial ends of a flywheel body of the flywheel energy storage system and comprises an annular fixed disc and an annular rotating disc, wherein the annular fixed disc and the annular rotating disc can rotate relatively; one surface of the rotating disk, which faces the flywheel body, protrudes out of the fixing part of the fixing disk, and one surface of the rotating disk, which faces away from the flywheel body, is lower than the ring surface of the fixing part of the fixing disk.
A plurality of horizontal needle grooves for accommodating the horizontal needle rollers are uniformly distributed on the annular surfaces on two sides of the supporting part of the fixed disc along the circumferential direction, one horizontal needle roller is placed in each horizontal needle groove, and the depth of each horizontal needle groove is smaller than the diameter of each horizontal needle roller.
The central line of the horizontal needle groove is positioned in the horizontal needle groove.
A plurality of vertical rolling needles are arranged between the inner circular surface of the fixed disc and the bottom surface of the annular groove of the rotating disc.
The bottom surface of the groove is provided with a plurality of vertical needle grooves, a vertical needle roller is placed in each vertical needle groove, and the depth of each vertical needle groove is smaller than the diameter of each vertical needle roller.
The central line of the vertical needle groove is positioned in the vertical needle groove.
The rotary disk is formed by fixedly connecting a first rotary disk and a second rotary disk.
The first rotating disc is arranged adjacent to the flywheel body.
The vertical needle groove is formed in the second rotating disc.
The principle of the invention is as follows: when the flywheel energy storage system is under an extreme special working condition (vibration is large or a power system fails), the flywheel can impact the rotating disc upwards/downwards, as the rotating disc is contacted with the horizontal rolling needles on the upper ring surface and the lower ring surface of the fixed disc, and the horizontal rolling needles are contacted with the fixed disc, the fixed disc is fixed with the flywheel shell, all impact forces can act on the horizontal rolling needles, the horizontal rolling needles are in line contact with the rotating disc and the fixed disc, the flywheel energy storage system has larger impact resistance, the horizontal rolling needles can roll freely in needle grooves of the flywheel energy storage system and have high-speed rotation capability, and when the flywheel energy storage system is arranged, the horizontal rolling needles are arranged into dozens of rolling needles, so that each rolling needle bears smaller rolling needle, the anti-impact rotation mechanism has high-speed heavy load capability, the anti-impact rotation mechanism protrudes out of 0.3mm of an axial magnetic bearing structure in the system, the high-speed heavy load can not act on the axial magnetic bearing, but completely acts on the anti-impact rotation mechanism, and the service life and thermal performance requirements of the upper mechanical bearing and the lower mechanical bearing in the flywheel energy storage system are ensured.
The vertical needle roller can prevent the impact-resistant rotating mechanism from moving left and right after being impacted.
The beneficial effects of the invention are as follows: the invention can effectively solve the problem of impact heat damage of the flywheel under extremely special working conditions (larger vibration or power system fault), ensures the running safety performance of the flywheel with MW level, and is also beneficial to the basis of challenges of the flywheel energy storage system to high performance.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the present invention assembled on a flywheel energy storage system;
the marks in the figure: 1. the device comprises a fixed disc, 2, a horizontal needle groove, 3, a second rotating disc, 4, a horizontal needle roller, 5, a vertical needle groove, 6, a vertical needle roller, 7, a countersunk head screw, 8 and a first rotating disc; 100. the anti-impact flywheel rotating mechanism comprises 200 parts of flywheel shell, 300 parts of axial magnetic bearing, 400 parts of flywheel body, 500 parts of cushion block.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples, which are not intended to be limiting.
Referring to the drawings, a flywheel anti-impact rotating mechanism for a flywheel energy storage system is used for being arranged at two axial ends of a flywheel body 400, the mechanism comprises an annular fixed disc 1 and an annular rotating disc, the cross section of the fixed disc 1 is of a step-shaped structure, the outer side in the radial direction is higher than the inner side in the radial direction, the outer side is a fixed part and the inner side is a supporting part, one annular surface in the axial direction of the fixed disc 1 is a plane, the other annular surface is a step surface, a plurality of horizontal needle grooves 2 are uniformly arranged on the lower surface of the step surface along the circumferential direction at intervals, the plurality of horizontal needle grooves 2 are all directed at the circle center of the fixed disc 1, and a horizontal needle roller 4 capable of freely rolling in the needle grooves is arranged in each horizontal needle groove 2; the rotary disk has the ring channel that can block the supporting part of fixed disk 1, and the notch of ring channel is seted up on the outer disc of rotary disk, and for the convenience of installation, the rotary disk can be formed by two parts upper and lower involution connection of first rotary disk 8 and second rotary disk 3, and first rotary disk 8 and second rotary disk 3 are the carousel that the transversal L was personally submitted to L shape, and first rotary disk 8 and second rotary disk 3 are to merging by countersunk head screw 7 in the axial direction to form the ring channel, after the rotary disk is installed on fixed disk 1, the ring channel both inner wall of rotary disk with horizontal needle 4 contact, through the roll of horizontal needle 4, the rotary disk can be for fixed disk 1 circumference rotation.
In order to ensure that the horizontal needle roller 4 can be kept in the needle groove without falling off when the flywheel is impacted to vibrate up and down, the depth of the horizontal needle groove 2 is larger than the radius of the horizontal needle roller 4 and smaller than the diameter of the horizontal needle roller, so that the central axis of the horizontal needle groove 2 is positioned in the needle groove, namely, after the horizontal needle roller 4 is placed in the horizontal needle groove 2, the central axis of the needle roller is positioned in the horizontal needle groove 2, and a part of the horizontal needle roller 4 is exposed out to form line contact with the rotating disk.
The horizontal needle groove 2 points to an opening at the center of the circle of the fixed disk 1 and is arranged on the inner circular surface of the fixed disk 1, and after the horizontal needle roller 4 is placed in the horizontal needle groove 2, the opening at the inner end of the horizontal needle groove 2 is closed by the groove bottom of the annular groove of the rotary disk, so that the horizontal needle roller 4 is prevented from moving left and right to be separated from the needle groove.
In order to reduce the left-right movement of the rotation impact of the flywheel body 400, a vertical needle roller 6 is further arranged between the groove bottom of the annular groove of the rotating disk and the inner circular surface of the fixed disk 1, and the vertical needle roller 6 can freely roll by taking the axis of the vertical needle roller as a shaft. One side of the first rotary disk 8 or the second rotary disk 3 used for forming the groove bottom of the annular groove is provided with a vertical needle groove 5, the depth of the vertical needle groove 5 is smaller than the diameter of the vertical needle roller 6 and larger than the radius of the vertical needle roller 6, so that after the vertical needle roller 6 is placed in the vertical needle groove 5, the central axis of the vertical needle roller 6 is positioned in the vertical needle groove 5, and the vertical needle roller 6 can be kept in the vertical needle groove 5 and is not separated when the flywheel impact vibration is received.
After the rotary disk and the fixed disk 1 are mounted in a matched manner, one side of the rotary disk, facing the flywheel body 400, protrudes out of the surface of the fixed disk 1, and one side of the rotary disk, facing away from the flywheel body 400, is lower than the surface of the fixed disk 1.
When the flywheel anti-impact rotary mechanism 100 is installed on a flywheel energy storage system, two flywheel anti-impact rotary mechanisms 100 are adopted, after the fixed discs 1 and the rotating discs of the two flywheel anti-impact rotary mechanisms 100 are assembled, the fixed discs are respectively installed at two axial ends of a flywheel body 400 and are sleeved on the outer sides of the outer circles of axial magnetic bearings 300 of the flywheel energy storage system, the fixed discs 1 in the flywheel anti-impact rotary mechanisms 100 are fixed on flywheel shells 200 or cushion blocks 500 fixed in the flywheel energy storage system through screws, the cushion blocks 500 are fixed in the flywheel shells 200, and first rotating discs 8 of the two flywheel anti-impact rotary mechanisms 100 face the flywheel body 400, and the surfaces of the first rotating discs 400 are 0.3mm higher than the end faces of the axial magnetic bearings 300, so that high-speed heavy loads completely act on the body of the anti-impact rotary mechanism 100, and the service lives and the thermal performance requirements of upper and lower mechanical bearings are ensured.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and it should be understood by those skilled in the art that modifications and equivalents may be made to the specific embodiments of the present invention with reference to the above embodiments, and any modifications and equivalents not departing from the spirit and scope of the present invention are within the scope of the claims appended hereto.
Claims (8)
1. The utility model provides a flywheel anti-impact rotary mechanism that flywheel energy storage system used which characterized in that: the flywheel anti-impact rotating mechanism is arranged at two axial ends of a flywheel body of the flywheel energy storage system and comprises an annular fixed disc and an annular rotating disc, wherein the annular fixed disc and the annular rotating disc can rotate relatively, the outer side of the fixed disc in the radial direction is a fixed part, the inner side of the fixed disc is a supporting part, the fixed part of the fixed disc is fixed on a cushion block in a flywheel shell or a shell, the rotating disc is provided with an annular groove which can be clamped on the supporting part of the fixed disc, a plurality of horizontal rolling needles are respectively supported between the annular groove and annular surfaces at two sides of the supporting part of the fixed disc in a rolling way, and the plurality of horizontal rolling needles are arranged at intervals along the circumferential direction of the fixed disc;
one surface of the rotating disk, which faces the flywheel body, protrudes out of the fixing part of the fixing disk, and one surface of the rotating disk, which faces away from the flywheel body, is lower than the ring surface of the fixing part of the fixing disk;
a plurality of horizontal needle grooves for accommodating the horizontal needle rollers are uniformly distributed on the annular surfaces on two sides of the supporting part of the fixed disc along the circumferential direction, one horizontal needle roller is placed in each horizontal needle groove, and the depth of each horizontal needle groove is smaller than the diameter of each horizontal needle roller.
2. The flywheel anti-impact rotation mechanism for a flywheel energy storage system of claim 1 wherein: the central line of the horizontal needle groove is positioned in the horizontal needle groove.
3. The flywheel anti-impact rotation mechanism for a flywheel energy storage system of claim 1 wherein: a plurality of vertical rolling needles are arranged between the inner circular surface of the fixed disc and the bottom surface of the annular groove of the rotating disc.
4. A flywheel anti-impact rotation mechanism for a flywheel energy storage system as defined in claim 3, wherein: the bottom surface of the groove is provided with a plurality of vertical needle grooves, a vertical needle roller is placed in each vertical needle groove, and the depth of each vertical needle groove is smaller than the diameter of each vertical needle roller.
5. The flywheel anti-impact rotation mechanism for a flywheel energy storage system of claim 4 wherein: the central line of the vertical needle groove is positioned in the vertical needle groove.
6. The flywheel anti-impact rotation mechanism for a flywheel energy storage system of claim 5 wherein: the rotary disk is formed by fixedly connecting a first rotary disk and a second rotary disk.
7. The flywheel anti-impact rotation mechanism for a flywheel energy storage system of claim 6 wherein: the first rotating disc is arranged adjacent to the flywheel body.
8. The flywheel anti-impact rotation mechanism for a flywheel energy storage system of claim 7 wherein: the vertical needle groove is formed in the second rotating disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210339575.0A CN114567119B (en) | 2022-04-01 | 2022-04-01 | Flywheel anti-impact rotary mechanism for flywheel energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210339575.0A CN114567119B (en) | 2022-04-01 | 2022-04-01 | Flywheel anti-impact rotary mechanism for flywheel energy storage system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114567119A CN114567119A (en) | 2022-05-31 |
| CN114567119B true CN114567119B (en) | 2024-01-30 |
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ID=81719166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210339575.0A Active CN114567119B (en) | 2022-04-01 | 2022-04-01 | Flywheel anti-impact rotary mechanism for flywheel energy storage system |
Country Status (1)
| Country | Link |
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| CN (1) | CN114567119B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002276539A (en) * | 2001-03-16 | 2002-09-25 | Mitsubishi Heavy Ind Ltd | Space electric power storage flywheel device |
| KR20090108429A (en) * | 2008-04-11 | 2009-10-15 | 현대자동차주식회사 | Protecting Appratus for Bearing in Flywheel for Vehicle |
| CN107317426A (en) * | 2017-08-25 | 2017-11-03 | 广东电网有限责任公司电力科学研究院 | A kind of rotation protection device of fly-wheel motor shafting |
-
2022
- 2022-04-01 CN CN202210339575.0A patent/CN114567119B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002276539A (en) * | 2001-03-16 | 2002-09-25 | Mitsubishi Heavy Ind Ltd | Space electric power storage flywheel device |
| KR20090108429A (en) * | 2008-04-11 | 2009-10-15 | 현대자동차주식회사 | Protecting Appratus for Bearing in Flywheel for Vehicle |
| CN107317426A (en) * | 2017-08-25 | 2017-11-03 | 广东电网有限责任公司电力科学研究院 | A kind of rotation protection device of fly-wheel motor shafting |
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| Publication number | Publication date |
|---|---|
| CN114567119A (en) | 2022-05-31 |
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