CN102904369A - Novel method for supporting high-speed motor rotor - Google Patents
Novel method for supporting high-speed motor rotor Download PDFInfo
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- CN102904369A CN102904369A CN2012104547530A CN201210454753A CN102904369A CN 102904369 A CN102904369 A CN 102904369A CN 2012104547530 A CN2012104547530 A CN 2012104547530A CN 201210454753 A CN201210454753 A CN 201210454753A CN 102904369 A CN102904369 A CN 102904369A
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Abstract
The invention discloses a non-contact method for supporting a high-speed motor rotor by using ultrasonic vibration. A bearing bush 2 with a conical surface is sleeved at each of the left end and the right end of the motor rotor 3; the bearing bushes 2 are respectively connected with an ultrasonic transducer 1; the inner conical surfaces of the bearing bushes 2 are matched with the outer conical surfaces of the ultrasonic transducers 1; when the ultrasonic transducers 1 are in an ultrasonic vibration states, the outer conical surfaces have suspension capacity; under the mutual action of the outer conical surfaces of the ultrasonic transducers 1 and the inner conical surfaces of the bearing bushes 2, suspension force is transmitted to the motor rotor 3, and motor rotor 3 is suspended under the extrusion action of the suspension force on two sides, so that an aim of supporting the motor rotor 3 without any contact is fulfilled; and moreover, the motor rotor 3 and a stator 4 are in a clearance non-friction state, so that high-rotating-speed rotation can be realized. The method has the advantages that an ultrasonic suspension supporting system is simple in structure, easy to control and high in stability; electromagnetic coupling does not exist between an ultrasonic suspension process and a motor, so that any influence on a rotating magnetic field of the motor can be avoided; and besides the conventional air floating, liquid floating or magnetic suspension, the invention provides another novel non-contact method for supporting the high-speed motor rotor.
Description
Technical field
The invention belongs to a kind of suspension support method of rotor, be specifically related to a kind of contactless method for supporting of rotor that utilizes ultrasonic vibration.
Background technology
High-speed electric expreess locomotive is widely used in industrial circles such as high-speed machine tool, turbomolecular pump, supercentrifuge, accurate gyroscope, flywheel storage, in recent years be successfully applied to especially flywheel energy storage in the small satellite system/attitude device, demonstrate it and become more and more important and wide application prospect.The rotor of tradition high-speed electric expreess locomotive is supported by two mechanical bearings, and friction and wear is large, the life-span is low, poor reliability, also produces serious mechanical oscillation and noise.The method that addresses these problems at present is the contactless air supporting of employing, liquid is floating or magnetic suspension bearing, can substantially realize hanging down and rub or turn round without friction, makes motor speed bring up to the above level of 50000r/min.But brought also thereupon that system configuration is complicated, energy consumption is large, efficient is low, bulky and problem that control system is complicated, seriously restricting further developing and using of high-speed electric expreess locomotive.
Its surface had the phenomenon of antifriction and suspending power when object carried out ultrasonic vibration, was confirmed by correlation theory and great many of experiments, had all delivered a large amount of papers both at home and abroad, and had successively some patents to begin to occur.The present invention proposes this Ultrasonic Levitation Ability is served as support to high speed rotor of motor, and realizes the automatic centering to rotor, be existing air supporting, liquid is floating or magnetic suspension outside another high speed rotor of motor noncontact support new method.
Summary of the invention
The invention provides a kind of contactless method for supporting that utilizes the rotor of ultrasonic vibration, the friction and wear that exists for existing contact friction bearing thus is large, vibration and noise serious problems, and the volume that contactless bearing exists is large, efficient is low, complex structure and other problems finds an alternative solution.
Supersonic wave suspended supporting way of the present invention can illustrate with Fig. 1.The left and right two ends of rotor 3 respectively are socketed one with the bearing shell 2 of the conical surface among Fig. 1, and bearing shell 2 respectively is connected with a ultrasonic transducer 1 respectively.The inner conical surface 201 (Fig. 2) of its intermediate bushing 2 matches with the male cone (strobilus masculinus) 106 (Fig. 3) of ultrasonic transducer 1.Then when ultrasonic transducer 1 is in the ultrasonic vibration state, produce suspending power at its male cone (strobilus masculinus) 106 places, and by with the interaction of the inner conical surface 201 of bearing liner 2, suspending power is passed to rotor 3.Since about a cover ultrasonic transducer 1 is respectively arranged in effect, then rotor 3 suspend under the suspending power squeezing action of both sides, has reached the purpose of contactless supporting motor rotor.Be in gapped between rotor and the stator 4 this moment and without Frotteurism, thereby can realize that large rotating speed rotates.
Ultrasonic transducer 1 can be made of langevin transducer, and its basic structure is (Fig. 3): front-end block 105, piezoelectric ceramic 103 and back-end block 102 tighten together via trip bolt 101.Connecting plate 104 is installed is used for fixedly langevin transducer.When high frequency (usually greater than the 10kHz) alternate electrical signal of applying for piezoelectric ceramic 103 to satisfy resonance to require, can form ultrasonic vibration at 106 places, surface of the male cone (strobilus masculinus) of front-end block 105.Langevin transducer is that a kind of high-frequency mechanical vibration commonly used (usually greater than 20kHz) forms mechanism, and it also has other various structures and formation method beyond Fig. 3.
Ultrasonic transducer 1 also can be for being suitable for providing other oscillators of dither (generally should be ultrasonic wave with upper frequency), such as piezoelectric stack, twin lamella oscillator etc.Its purpose all is to produce suspending power at 106 places, surface of male cone (strobilus masculinus).
The bearing shell 2 that use at rotor 3 left and right two ends and the ultrasonic transducer 1 that cooperates with it, the reason that its contact-making surface is necessary for taper surface is, according to the transfer principle of power as can be known, taper surface can guarantee that the power (as axially) of the single direction that will accept is decomposed into the power of both direction, namely produce simultaneously original direction and with the power of the direction of original perpendicular direction.Under the effect of these two direction power, rotor could both axially keeping balance (shaftless to movement), also can obtain suspension support at radial force.
The separately size of the both direction power that rotor 3 of the present invention forms after decomposing with bearing shell 2 taper surfaces is relevant with the angle a of taper surface.Affect in the situation disregarding frictional force, when taper surface angle a is 45 °, the power in the same size of both direction.According to weight and the rotating speed requirement of rotor, the angle a of general taper surface can be between 15 °～75 °.Inner conical surface and male cone (strobilus masculinus) are identical transmitting using of power in addition, so the contact-making surface of ultrasonic transducer 1 and the bearing shell 2 inside and outside conical surface each other cooperates requirement but must satisfy.Namely when the contact-making surface of bearing shell 2 was inner conical surface (or male cone (strobilus masculinus)), the contact-making surface of the ultrasonic transducer 1 that cooperates with it then should be male cone (strobilus masculinus) (or inner conical surface), and both conical surface angles are identical, the mating surface contact is good.
The invention has the advantages that: the supersonic wave suspended system configuration is simple, control is easy, good stability.Without electromagnetic coupled, thereby can the rotating magnetic field of motor not exerted an influence between supersonic wave suspended process and the motor; Can realize easily the effect of rotor automatic aligning in addition, anti-diametral interference ability is strong, and control circuit is also comparatively simple.The electric system technology of supersonic wave suspended support has some superiority at aspects such as reducing high-speed electric expreess locomotive weight, raising life and reliability, minimizing output torque ripple, reduction control system complexity.
Description of drawings:
Fig. 1 is structural representation of the present invention;
Fig. 2 is bearing bush structure schematic diagram of the present invention;
Fig. 3 be the ultrasonic transducer that adopts of the present invention a kind of-the langevin transducer structural representation;
Fig. 4 is the structural representation of one of embodiments of the present invention;
The 1-ultrasonic transducer, 2-bearing shell, 3-rotor, the 4-motor stator, 5-ultrasonic transducer holder, 6-motor housing, the 7-motor fixing seat, 8-motor winding, 9-ultrasonic signal generator, the 101-trip bolt, 102-back-end block, 103-piezoelectric ceramic, 104-installs connecting plate, 105-front-end block, the 106-ultrasonic transducer conical surface, the 201-bearing shell conical surface, a-conical surface angle
Embodiment:
The embodiment that provides below in conjunction with accompanying drawing 4 is described in further detail structure of the present invention and principle.
Fig. 4 be one with the contactless method for supporting structural representation of langevin transducer as the rotor of ultrasonic transducer.Wherein the left and right two ends of rotor 3 respectively are socketed one with the bearing shell 2 of the conical surface, and bearing shell 2 respectively is connected with a langevin transducer respectively, and the inner conical surface 201 (Fig. 2) of its intermediate bushing 2 matches to merge with the male cone (strobilus masculinus) 106 (Fig. 3) of langevin transducer and need possess certain gap.Langevin transducer 1 is connected with ultrasonic transducer holder 5 and fixes by connecting plate 104 will be installed, and motor is fixed by being connected with motor fixing seat 7; And the mutual alignment of adjusting between ultrasonic transducer holder 5 and the motor fixing seat 7 concerns with installing, and can obtain reasonable clearance between motor winding 8 (motor stator 4) internal diameter and the rotor external diameter and the reasonable clearance between bearing shell 2 and langevin transducer 1 contact-making surface.
Before high-speed electric expreess locomotive work, first ultrasonic signal generator 9 is opened and the high-frequency signal of its generation is imposed on langevin transducer 1, the frequency of adjusting ultrasonic signal generator 9 makes it to satisfy the resonance requirement of langevin transducer, then langevin transducer is in resonance condition and forms suspending power at male cone (strobilus masculinus) 106 places, when left and right each cover langevin transducer is worked simultaneously and all is in resonance condition, rotor is just at the both sides suspending power squeezing action low suspension that bearing shell 2 inner conical surfaces pass over, and can open motor power this moment makes the motor high speed operation.Since be between rotor and the stator this moment suspension without Frotteurism, thereby can realize large rotating speed rotation.
Claims (4)
1. contactless method for supporting of rotor that utilizes ultrasonic vibration.It is characterized in that: the left and right two ends of rotor 3 respectively are socketed a bearing shell 2 and each is connected with a ultrasonic transducer 1, and its intermediate bushing 2 is the taper surface that cooperatively interacts with the contact-making surface that is connected of ultrasonic transducer 1.
2. a kind of contactless method for supporting of rotor that utilizes ultrasonic vibration according to claim 1, it is characterized in that: ultrasonic transducer 1 can be made of langevin transducer, also can be by being suitable for providing other oscillator-piezoelectric stacks of dither (generally should be ultrasonic wave with upper frequency) and twin lamella oscillator to consist of.
3. a kind of contactless method for supporting of rotor that utilizes ultrasonic vibration according to claim 1, it is characterized in that: bearing shell 2 is necessary for taper surface with the contact-making surface that is connected of ultrasonic transducer 1, and the angle of its taper surface is between 15 °～75 °.
4. a kind of contactless method for supporting of rotor that utilizes ultrasonic vibration according to claim 1, it is characterized in that: between the taper surface as the contact-making surface of bearing shell 2 and ultrasonic transducer 1, it is a kind of matching relationship, namely when the contact-making surface of bearing shell 2 is inner conical surface (or male cone (strobilus masculinus)), the contact-making surface of the ultrasonic transducer 1 that cooperates with it then should be male cone (strobilus masculinus) (or inner conical surface), and both conical surface angles are identical, contact is good.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104547530A CN102904369A (en) | 2012-11-14 | 2012-11-14 | Novel method for supporting high-speed motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104547530A CN102904369A (en) | 2012-11-14 | 2012-11-14 | Novel method for supporting high-speed motor rotor |
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| Publication Number | Publication Date |
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| CN102904369A true CN102904369A (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104547530A Pending CN102904369A (en) | 2012-11-14 | 2012-11-14 | Novel method for supporting high-speed motor rotor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105556238A (en) * | 2013-07-22 | 2016-05-04 | 奥钢联钢铁公司 | Method and apparatus for the non-contact support of a sensor and/or actuator device |
| CN106122015A (en) * | 2016-08-25 | 2016-11-16 | 深圳沃海森科技有限公司 | Supersonic wave suspended oil-free frequency converting air-conditioner compressor |
| CN112468015A (en) * | 2019-08-19 | 2021-03-09 | 佳能株式会社 | Vibration type motor and driving apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5559651A (en) * | 1995-04-12 | 1996-09-24 | Seagate Technology, Inc. | Magnetic disc storage system with hydrodynamic bearing |
| CN1388638A (en) * | 2002-06-30 | 2003-01-01 | 华中科技大学 | Traveling-wave type supersonic motor |
| CN102460910A (en) * | 2009-05-15 | 2012-05-16 | 发现技术国际股份有限公司 | Electric motor with ultrasonic non-contact bearing |
-
2012
- 2012-11-14 CN CN2012104547530A patent/CN102904369A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5559651A (en) * | 1995-04-12 | 1996-09-24 | Seagate Technology, Inc. | Magnetic disc storage system with hydrodynamic bearing |
| CN1388638A (en) * | 2002-06-30 | 2003-01-01 | 华中科技大学 | Traveling-wave type supersonic motor |
| CN102460910A (en) * | 2009-05-15 | 2012-05-16 | 发现技术国际股份有限公司 | Electric motor with ultrasonic non-contact bearing |
Non-Patent Citations (1)
| Title |
|---|
| 田丰君等: "双向支撑超声波悬浮轴承的设计", 《光学 精密工程》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105556238A (en) * | 2013-07-22 | 2016-05-04 | 奥钢联钢铁公司 | Method and apparatus for the non-contact support of a sensor and/or actuator device |
| CN105556238B (en) * | 2013-07-22 | 2018-12-18 | 奥钢联钢铁公司 | Method and apparatus for non-contactly supporting sensing and/or actuator apparatus |
| CN106122015A (en) * | 2016-08-25 | 2016-11-16 | 深圳沃海森科技有限公司 | Supersonic wave suspended oil-free frequency converting air-conditioner compressor |
| CN112468015A (en) * | 2019-08-19 | 2021-03-09 | 佳能株式会社 | Vibration type motor and driving apparatus |
| CN112468015B (en) * | 2019-08-19 | 2023-08-04 | 佳能株式会社 | Vibration motor and driving apparatus |
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Application publication date: 20130130 |