CN102723805A - Method and device for improving kinetic stability of high-stored-energy flywheel metal hub - Google Patents
Method and device for improving kinetic stability of high-stored-energy flywheel metal hub Download PDFInfo
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- CN102723805A CN102723805A CN2012102072768A CN201210207276A CN102723805A CN 102723805 A CN102723805 A CN 102723805A CN 2012102072768 A CN2012102072768 A CN 2012102072768A CN 201210207276 A CN201210207276 A CN 201210207276A CN 102723805 A CN102723805 A CN 102723805A
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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
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- 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
The invention discloses a method and a device for improving kinetic stability of a metal hub of a high-stored-energy flywheel. By changing the geometric dimension of the metal hub of the high-stored-energy flywheel, the natural frequency of the metal hub is changed to avoid resonance resulting from the fact that the natural frequency of the metal hub and the working frequency of the metal hub are the same; and a deflection torque is generated in the rotation process of the hub to prevent the edge of the hub from falling off from the hub and keep the magnitude of interference of the hub, so as to improve the kinetic stability of the metal hub. The natural frequency and the center of the centrifugal force of the hub are changed by changing the geometric dimension of the metal hub, therefore, not only is the probability of resonance generated in the operation is effectively reduced, but also the problem of loss of magnitude of interference of the edge of the hub and the metal hub is effectively solved, and the kinetic stability of the metal hub is improved.
Description
Technical field
The present invention relates to the machine science field, especially a kind of method and device that improves high accumulated energy flywheel metal wheel hub dynamic stability.
Background technology
High energy-storing flywheel system is historical as a kind of long service life, existing 30 years of researches of pollution is little, maintenance cost is low mechanical energy storing device.At the initial stage, the main element of energy storage is the wheel rim rotor, is formed by made usually, and like high strength steel, but huge centrifugal force will make metallic rotator be split into three bulks during high speed rotating.The energy storage total amount not only with square being directly proportional of flywheel mass, rotary speed, and be directly proportional with the ratio of rotor material hot strength, density, therefore reduce quality, rev up can improve the energy storage total amount of flywheel energy storage system to greatest extent.Composite material rotor compare with metallic rotator have the intensity height, characteristics that density is little, can store more energy.Resin base fiber reinforced composite material like this like carbon fibre or glass, has intensity height, characteristics that density is little, is desirable flywheel rim rotor manufactured materials, in high accumulated energy flywheel, occupies an important seat.
High running speed has brought great centrifugal force, produces high radial stress, circumferential stress in the wheel rim.The reciprocation of radial stress and circumferential stress radially outwards expands the composite material wheel rim.The flywheel metal wheel hub is as the connector that keeps interference fit between wheel rim and gyroaxis, and metal alloy or composite material higher by intensity, that quality is less are processed usually.The metal alloy metal wheel hub provides the strength and stiffness of flywheel assembly.But the deflection of the radial-deformation of metal wheel hub and composite material wheel rim is not on the same order of magnitude; Wheel rim separates with metal wheel hub like this; Produce sharply vibration, flexible better by the metal wheel hub that composite material is processed, can reduce separating of metal wheel hub and wheel rim; But usually because rigidity is not enough, himself critical whirling speed is little than the design and operation rotating speed for the composition metal wheel hub.
The composite material wheel rim that cooperates when interference separates with metal wheel hub, will bring the high vibration that is difficult to imagine when producing the gap.When this vibration frequency and flywheel assembly and each part generation resonance, can directly destroy operating high energy-storing flywheel system.But common correlation technique is devoted to solve the consistency problem of flywheel assembly and ultralight, high-strength composite material wheel rim.
The disclosed two kinds of metal wheel hub structures of Chinese patent (patent No. ZL 200410010855.9) are respectively the titanium alloy metal wheel hubs that the metal wheel hub that links to each other with internal rotor is made up of interior ring, outer shroud and spoke; Link to each other with external rotor; The titanium alloy metal wheel hub of forming by interior ring, outer shroud, spoke, magnetic guiding loop; And the process for making of metal wheel hub, not relating to the critical whirling speed and the response thereof of rotor in this method, rotor will produce rapid the vibration during through first critical speed.
Summary of the invention
The objective of the invention is: a kind of method and device that improves high accumulated energy flywheel metal wheel hub dynamic stability is provided; It can reduce the high-speed cruising hour wheel and lose because of the metal wheel hub magnitude of interference; And reduce the resonance possibility when moving, to overcome the deficiency of prior art.
The present invention is achieved in that the method that improves high accumulated energy flywheel metal wheel hub dynamic stability; It is characterized in that: the physical dimension of the metal wheel hub through changing high accumulated energy flywheel; The natural frequency of metal wheel hub is changed, thereby avoid the natural frequency of metal wheel hub identical with its operating frequency and produce and resonate; And make wheel hub in rotation process, produce a deflection torque, and avoid wheel rim to come off from wheel hub, keep its magnitude of interference, to improve the dynamic stability of metal wheel hub.
High accumulated energy flywheel metal wheel hub comprises inner ring, and the outer ring is connected with web between inner ring and outer ring, and the inner ring top is littler by 1/3～1/2 to the vertical length at center than the inner ring bottom to the vertical length at center.
On the outer ring, be provided with vertically to equally distributed groove.Fluting is divided into several with groove with the outer ring of metal wheel hub on the outer ring, has so not only interrupted the circumferential stress transmission, promotes the radially extension in the turning course, produces interfacial stress, just reduces value of interference fit and comes transmitting torque; And this compression also will reduce the radial drawing stress in the wheel rim, can improve total energy storage.This structure can increase the compatibility of metal wheel hub and composite material wheel rim, guarantees the magnitude of interference of wheel rim and metal wheel hub, can change the stress state of wheel hub itself, improves its deflection.
The outer wall of outer ring is a back taper, and its tapering is 1:150.Back taper can guarantee the axiality and the magnitude of interference of wheel rim and metal wheel hub.
The link position of web and inner ring and outer ring is provided with chamfering, and the radius of curvature of chamfering is 1/5 of a web length.Web is that metal wheel hub provides rigidity, rigidity and web thickness proportion relation.Web thickness is thick more, then provides rigidity high more.
The present invention adopts the non-uniform thickness in metal wheel hub cross section to design, but economical with materials, raising critical frequency and operation rotating speed, and better the reduction assembled cooling time.
The present invention considers under the situation of metal wheel hub dynamic performance and distortion, intensity the metal wheel hub structure to be designed at the same time.Select the physical dimension of metal wheel hub, design, in the design process, adopt finite element analysis, carry out design of Interaction as using the ANSYS finite element analysis software like web thickness, faying face length, inner ring, outer ring thickness.
It is 1.4-3 times that metal wheel hub structure among the present invention, its critical whirling speed surpass the working speed multiple.The design operation rotating speed of metal wheel hub is 16000 rev/mins (RPM) among the present invention, and corresponding design operation frequency is 266.7HZ, and this metal wheel hub is processed by 3J33.In the metal wheel hub structure, can know among the present invention that outer ring thickness is 18mm through finite element analysis.It is big that axle and the coefficient of friction of metal wheel hub are taken turns intermarginal coefficient of friction than metal wheel hub and composite material, so outer ring length compares more longerly with inner ring, with assurance the enough frictional resistance with inner ring place same order is provided.Metal wheel hub structure among the present invention, under the normal running rotating speed, its radial deformation guarantees to contact with the composite material wheel rim, such as interference fit.
Owing to adopt above-mentioned technical scheme; Compared with prior art; The present invention adopts the mode that changes the metal wheel hub physical dimension to change its natural frequency, and the centrifugal force center, has both effectively reduced the possibility that produces resonance in the running; Can efficiently solve the problem of the wheel rim and metal wheel hub magnitude of interference loss again, improve the dynamic stability of metal wheel hub; The inventive method is simple, and the structure that is adopted is made easily, and is with low cost, and result of use is good.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention.
Embodiment
Embodiments of the invention 1: the method that improves high accumulated energy flywheel metal wheel hub dynamic stability; The physical dimension of the metal wheel hub through changing high accumulated energy flywheel; The natural frequency of metal wheel hub is changed, thereby avoid the natural frequency of metal wheel hub identical with its operating frequency and produce and resonate; And make wheel hub in rotation process, produce a deflection torque, and avoid wheel rim to come off from wheel hub, keep its magnitude of interference, to improve the dynamic stability of metal wheel hub.
The structure of high accumulated energy flywheel metal wheel hub is as shown in Figure 1, comprises inner ring 1, and outer ring 3 is connected with web 2 between inner ring 1 and outer ring 3, and inner ring 1 top is littler by 1/2 to the vertical length at center than inner ring 1 bottom to the vertical length at center; On outer ring 3, be provided with vertically to equally distributed groove 5; The outer wall of outer ring 3 is a back taper, and its tapering is 1:150; Web 2 is provided with chamfering 4 with the link position of inner ring 1 and outer ring 3, and the radius of curvature of chamfering 4 is 1/5 of a web length.
The outer ring 3 of metal wheel hub, inner ring 1 and web 2 can adopt high duty metal, like titanium alloy TC 4, aluminium alloy 7075, elastic alloy 3J33 etc.The good cost performance of aluminium alloy.
When choosing metal wheel hub critical frequency coefficient of safety, relevant with supporting, in the present embodiment, to choose 3 and be coefficient of safety, critical whirling speed is 48000 rev/mins (RPM), corresponding design operation frequency is 800HZ.The metal wheel hub structure under the high speed operation rotating speed, 16000 rev/mins (RPM), corresponding design operation frequency is 266.7HZ, needs to guarantee that effective contact-making surface length minimum of outer ring and wheel rim is 412mm.
Product of the present invention is not considered the distortion of compound wheel rim when hanging down the operation rotating speed, when the rotating speed increase, wheel rim deforms, and deflections take place in the outer ring 3 of resultant metal wheel hub of the present invention, to guarantee interference fit, also can reduce the tangential stress between wheel rim and metal wheel hub.Like this, because the critical speed and the frequency of the metal wheel hub self among the present invention are higher, therefore can not resonate.
When product of the present invention and compound wheel rim assembled, the mode that the initial magnitude of interference adopts cold charge and pressure assembling to combine guaranteed.Chilling temperature is subzero 145 ℃; Be 30 minutes cooling time, and being pressed into length is 75mm, and the power of being pressed into is 270KN, and press-in speed is 4m/s, after press-fiting, keeps axial compressive force 30min.
Claims (5)
1. method that improves high accumulated energy flywheel metal wheel hub dynamic stability; It is characterized in that: the physical dimension of the metal wheel hub through changing high accumulated energy flywheel; The natural frequency of metal wheel hub is changed, thereby avoid the natural frequency of metal wheel hub identical with its operating frequency and produce and resonate; And make wheel hub in rotation process, produce a deflection torque, and avoid wheel rim to come off from wheel hub, keep its magnitude of interference, to improve the dynamic stability of metal wheel hub.
2. one kind high accumulated energy flywheel metal wheel hub; Comprise inner ring (1); Outer ring (3) is connected with web (2) between inner ring (1) and outer ring (3), it is characterized in that: inner ring (1) top is littler by 1/3～1/2 to the vertical length at center than inner ring (1) bottom to the vertical length at center.
3. high accumulated energy flywheel metal wheel hub according to claim 2 is characterized in that: on outer ring (3), be provided with vertically to equally distributed groove (5).
4. high accumulated energy flywheel metal wheel hub according to claim 2 is characterized in that: the outer wall of outer ring (3) is a back taper, and its tapering is 1:150.
5. high accumulated energy flywheel metal wheel hub according to claim 2 is characterized in that: web (2) is provided with chamfering (4) with the link position of inner ring (1) and outer ring (3), and the radius of curvature of chamfering (4) is 1/5 of a web length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210207276.8A CN102723805B (en) | 2012-06-21 | 2012-06-21 | Method for improving kinetic stability of high-stored-energy flywheel metal hub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210207276.8A CN102723805B (en) | 2012-06-21 | 2012-06-21 | Method for improving kinetic stability of high-stored-energy flywheel metal hub |
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| Publication Number | Publication Date |
|---|---|
| CN102723805A true CN102723805A (en) | 2012-10-10 |
| CN102723805B CN102723805B (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210207276.8A Expired - Fee Related CN102723805B (en) | 2012-06-21 | 2012-06-21 | Method for improving kinetic stability of high-stored-energy flywheel metal hub |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321977A (en) * | 2018-03-06 | 2018-07-24 | 广东电网有限责任公司电力科学研究院 | One kind dividing valve circular ring shell alloy wheel hub combined accumulation energy flywheel |
| CN113595322A (en) * | 2021-07-29 | 2021-11-02 | 中国科学院工程热物理研究所 | Anti-disengagement flywheel structure and flywheel energy storage system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4860611A (en) * | 1986-08-15 | 1989-08-29 | Flanagan Ralph C | Energy storage rotor with flexible rim hub |
| CN1592044A (en) * | 2004-05-12 | 2005-03-09 | 中国科学院长春光学精密机械与物理研究所 | High-Energy accumulation density flywheel hub structure and making method thereof |
| CN202073979U (en) * | 2010-12-17 | 2011-12-14 | 上海复合材料科技有限公司 | Flywheel with composite material structure |
| CN202280752U (en) * | 2011-10-27 | 2012-06-20 | 南通大通宝富风机有限公司 | Novel hub |
| CN202651976U (en) * | 2012-06-21 | 2013-01-02 | 贵州大学 | High energy-storage metal wheel hub of flywheel |
-
2012
- 2012-06-21 CN CN201210207276.8A patent/CN102723805B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4860611A (en) * | 1986-08-15 | 1989-08-29 | Flanagan Ralph C | Energy storage rotor with flexible rim hub |
| CN1592044A (en) * | 2004-05-12 | 2005-03-09 | 中国科学院长春光学精密机械与物理研究所 | High-Energy accumulation density flywheel hub structure and making method thereof |
| CN202073979U (en) * | 2010-12-17 | 2011-12-14 | 上海复合材料科技有限公司 | Flywheel with composite material structure |
| CN202280752U (en) * | 2011-10-27 | 2012-06-20 | 南通大通宝富风机有限公司 | Novel hub |
| CN202651976U (en) * | 2012-06-21 | 2013-01-02 | 贵州大学 | High energy-storage metal wheel hub of flywheel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321977A (en) * | 2018-03-06 | 2018-07-24 | 广东电网有限责任公司电力科学研究院 | One kind dividing valve circular ring shell alloy wheel hub combined accumulation energy flywheel |
| CN113595322A (en) * | 2021-07-29 | 2021-11-02 | 中国科学院工程热物理研究所 | Anti-disengagement flywheel structure and flywheel energy storage system |
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| CN102723805B (en) | 2014-12-10 |
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Granted publication date: 20141210 Termination date: 20190621 |