CN104444135A - Single excitation ultrasonic elliptic vibration multi-vibrator bidirectional material conveying device - Google Patents
Single excitation ultrasonic elliptic vibration multi-vibrator bidirectional material conveying device Download PDFInfo
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- CN104444135A CN104444135A CN201410740174.1A CN201410740174A CN104444135A CN 104444135 A CN104444135 A CN 104444135A CN 201410740174 A CN201410740174 A CN 201410740174A CN 104444135 A CN104444135 A CN 104444135A
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Abstract
The invention discloses a single excitation ultrasonic elliptic vibration multi-vibrator bidirectional material conveying device which is mainly used for accurately and precisely conveying strip-shaped materials. The device is characterized in that a plurality of vibrators are adopted as excitation vibration bodies, divided into two groups and alternatively and oppositely arranged; each vibrator comprises an ultrasonic vibration transducer, an elliptic vibration mode converter and friction drive blocks arranged at the front end of the elliptic vibration mode converter; the ultrasonic vibration transducer comprises a bolt as well as a rear cover plate, a piezoelectric ceramic piece, electrode plates and a front cover plate which sleeve the bolt in sequence; the rear cover plate, the piezoelectric ceramic piece, the electrode plates and the front cover plate are connected and compressed through the bolt; the elliptic vibration mode converter is arranged at the front end of the ultrasonic vibration transducer, adopts a straight beam and oblique beam combined structure, and can convert longitudinal ultrasonic vibration generated by the ultrasonic vibration transducer into longitudinal-flexural composite ultrasonic elliptic vibration of the tail end of the elliptic vibration mode converter and the friction drive blocks; when the two groups of different vibrators work respectively, the corresponding two groups of friction drive blocks drive the strip-shaped materials to perform bidirectional continuous movement respectively to realize bidirectional precision conveying of the strip-shaped materials.
Description
Technical field
The present invention relates to the accurate transportation art of the vibration utilizing piezoceramic inverse piezoelectric effect, especially relate to a kind of list excitation ultrasonic elliptical vibratory that utilizes and carry out the many oscillators material Bidirectional conveying device driven.
Background technology
The fields such as automated production processing and assembling are prepared etc. at medicine, chemical industry, food, machinery, material, the transmission of material and parts and assembling, adopt traditional low-frequency high-amplitude electric and magnetic oscillation transmitting device always, during this device work, noise is more, dispensing precision is low, be not easy to realize precise closed-loop control, power volume is little, and these problems govern the raising of accurate transmission system overall performance always.
The excess sound pressure electric drive having developed rapidly and applied since the eighties in 20 century is that accurate transmission system provides opportunity, it is by the rubbing effect between stator and mover, elastomeric micro breadth oscillation is converted to macroscopical straight line (rotation) motion of mover, directly promote load.Because it has that volume is little, lightweight, low-speed big, noise are little, response is fast, positioning precision is high, without electromagnetic interference and the advantage such as compatible with environment is strong, obtains increasingly extensive application in technical fields such as medical treatment, aerospace, robot, MEMS.
But existing traveling-wave ultrasonic feedway also exist row wave attenuation compared with large, long distance delivery be restricted be difficult to realize, material in delivered length maldistribution, complex structure, horsepower output is little, manufactures is difficult, to the deficiency such as manufacture that matching requirements are higher, cost is higher and the life-span is short.These problems constrain their application in the industrial production.
Summary of the invention
The invention provides a kind of novel list excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway, object is to overcome the deficiency existed in existing material precision conveying device, simplify vibration precision conveying device structure, reduce manufacture difficulty, reduce cost, improve service life and improve system works stability.
A kind of single excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway, it adopts multiple oscillator as excitor, multiple oscillator is divided into two groups, and two groups of oscillators alternately arrange in opposite directions, and each oscillator comprises single-excitation ultrasonic oval vibration energy converter, elliptical vibration modal transducer and friction-driven block; Described single-excitation ultrasonic oval vibration energy converter entirety is in cylinder, it comprises bolt and is set in back shroud, piezoelectric ceramic piece, electrode slice and the front shroud on bolt successively, front shroud is provided with the flange that can connect with other constructional device, back shroud, piezoelectric ceramic piece, electrode slice and front shroud are connected compression by bolt by back shroud and front shroud; Constitute the energy conversion part of single excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway, the ultrasonic electric energy that ultrasonic-frequency power supply exports is converted to the ultrasonic vibrational energy of ultrasonic transducer.
Described elliptical vibration modal transducer and front shroud are made into the front end that is integrally provided in front shroud, or the welding of elliptical vibration modal transducer is arranged on the front end of front shroud.Elliptical vibration modal transducer comprises the composite structure of straight beam and cant beam formation, straight beam and cant beam are rectangle perpendicular to the cross section of its central axis, the central axis of straight beam and the central axes of single-excitation ultrasonic oval vibration energy converter, one end of straight beam connects with the front shroud of ultrasonic transducer, and the other end overhangs; The side of one end of cant beam and the front shroud displaced central axis line of ultrasonic transducer connects, the middle part of the other end and straight beam connects, the central axis of cant beam becomes 0-90 degree angle with the central axis of straight beam, and straight beam and cant beam are arc transition with the connection place of ultrasonic transducer front shroud and connect.
The assembly set that elliptical vibration modal transducer is formed after being arranged on single-excitation ultrasonic oval vibration energy converter front end is called single excitation ultrasonic elliptical vibratory transducer, to be the object of straight beam and cant beam composite structure be elliptical vibration modal transducer in order to change the mode of vibration of single excitation ultrasonic elliptical vibratory transducer, make its longitudinal vibration mode frequency and flexural vibration mode frequency close to or equal; Due to the existence of oblique beam structure, the longitudinal ultrasonic vibration that single-excitation ultrasonic oval vibration energy converter produces is after being delivered to cant beam, a part of longitudinal vibration component and a part of bending vibrattion component is decomposed at cant beam root, the longitudinal vibration component decomposed when cant beam and after bending vibrattion component is delivered to straight beam, with the longitudinal vibration phase compound that straight beam is propagated, finally formed at straight beam end and there is the longitudinal vibration component of certain phase difference and the ultrasonic elliptical vibratory of bending vibrattion component compound.
Described friction-driven block is arranged on the front end of elliptical vibration modal transducer by welding, bonding or screw attachment mode, friction-driven block contacts with strip-shaped materials, the length of strip-shaped materials is greater than the distance between 3 friction-driven blocks of arbitrary continuation, and the distance that namely 3 oscillators of arbitrary continuation are arranged along mass transport direction is less than institute's convey materials length.The flange of single-excitation ultrasonic oval vibration energy converter is used for installing oscillator and precompressed compression device, multiple oscillator is connected formation in aggregates single excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway, the single-excitation ultrasonic oval vibration energy converter axis after flange and support are fixed and the angle between horizontal surface are 0 degree ~ 90 degree.
Described oscillator is arranged along the direction of mass transport, and its path is straight line path or curved path, and described oscillator is along the single-row setting in direction of mass transport or multiple row is parallel arranges.
After the ultrasonic electric signal of ultrasonic-frequency power supply output is linked into the electrode slice of single-excitation ultrasonic oval vibration energy converter, namely single-excitation ultrasonic oval vibration energy converter produces ultrasonic vibration, after ultrasonic vibrational energy is delivered to elliptical vibration modal transducer end from single-excitation ultrasonic oval vibration energy converter, be converted to the vertical curved composite ultrasonic elliptical vibratory of longitudinal vibration and the bending vibrattion compound with certain phase difference, namely the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration modal transducer end is converted to, and drive friction-driven block to do ultrasonic elliptical vibratory together with elliptical vibration modal transducer end, and then drive strip-shaped materials to move continuously.
When the oscillator of different two groups carries out work respectively, corresponding two groups of friction-driven blocks drive strip-shaped materials to carry out two-way continuous motion respectively, realize the two-way precision conveying of strip-shaped materials.Compare the device for transporting objects that existing document is introduced, this list excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway has that power capability is large, energy conversion efficiency is high, structure is simple, easy to manufacture, cost is low, the rigidity of structure is large, control-driven system is simple and vibration performance such as to stablize at the advantage.
Further, each oscillator of described list excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway all only has one group of longitudinal vibration piezoelectric ceramic piece.
Further, two groups of oscillator Zhi Xu mono-road ultrasonic electric signal excitations of described list excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway.
Present invention employs the longitudinal vibration that mechanical vibration MODAL TRANSFORMATION OF A mechanism is decomposed into the longitudinal vibration of single-excitation ultrasonic oval vibration energy converter conversion straight beam, the longitudinal vibration of cant beam and bending vibrattion component, finally synthesize vertical curved composite ultrasonic elliptical vibratory at straight beam end, simplify the integral structure of single excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway, greatly reduce the complexity of vibrating system, reduce manufacture, assembly difficulty and productive costs, whole single excitation ultrasonic elliptical vibratory many oscillators bidirectional material transport conveyor constructions is simple, easy to manufacture, be conducive to the realization of micro-miniaturisation target, this invention only needs a road control circuit and ultrasonic electric signal to encourage in addition, control difficulty is low, avoid the complicated ultrasonic-frequency power supply development cost that two-phase or multiphase ultrasonic vibration is compounded to form elliptical vibration transducer, simplify control circuit and ultrasonic-frequency power supply structure, reduce control circuit and ultrasonic-frequency power supply cost, reduce control circuit and ultrasonic-frequency power supply volume, be easy to the micro-miniaturisation realizing control circuit and ultrasonic-frequency power supply, integrated, improve reliability, serviceability is more stable, has a extensive future.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the front view of single excitation ultrasonic elliptical vibratory transducer in the present invention.
Fig. 3 is the left view of single excitation ultrasonic elliptical vibratory transducer in the present invention.
Fig. 4 is application example schematic diagram of the present invention.
Number in the figure illustrates: 1. bolt, 2. back shroud, 3. piezoelectric ceramic piece, 4. electrode slice, 5. front shroud, 6. flange, 7. elliptical vibration modal transducer, 8. friction-driven block, 9. strip-shaped materials, 10. ultrasonic-frequency power supply.
Detailed description of the invention
Shown in composition graphs 1,2,3, a kind of single excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway, it adopts 10 oscillators as excitor, and every 5 oscillators are divided into one group, and the direction single file of two groups of oscillators alternately in opposite directions along convey materials is aligned.Each oscillator comprises single-excitation ultrasonic oval vibration energy converter, elliptical vibration modal transducer 7 and friction-driven block 8; Single-excitation ultrasonic oval vibration energy converter entirety is in cylinder, it comprises bolt 1 and is set in back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and the front shroud 5 on bolt 1 successively, front shroud 5 is provided with the flange 6 that can connect with other constructional device, back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and front shroud 5 are connected compression by bolt 1 by back shroud 2 and front shroud 5, constitute the energy conversion part of single excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway, the ultrasonic electric energy exported by ultrasonic-frequency power supply 10 is converted to the ultrasonic vibrational energy of single-excitation ultrasonic oval vibration energy converter.Each oscillator of this list excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway only has one group of longitudinal vibration piezoelectric ceramic piece 3, piezoelectric ceramic transducer section diameter 30mm, and the material of piezoelectric ceramic piece 3 is PZT-8, is of a size of:
Ф 30mm × Ф 15mm × 5mm, the sheet number of piezoelectric ceramic piece 3 is 2,
Elliptical vibration modal transducer 7 and front shroud 5 are made into the front end that an one-piece parts is arranged on front shroud 5, elliptical vibration modal transducer 7 comprises the composite structure of straight beam and cant beam formation, straight beam and cant beam are rectangle perpendicular to the cross section of its central axis, the central axis of straight beam and the central axes of single-excitation ultrasonic oval vibration energy converter, one end of straight beam connects with the front shroud 5 of ultrasonic transducer, the other end overhangs, and the cross section length of side is 12
×12mm, long 72mm; The side of one end of cant beam and the front shroud 5 displaced central axis line of ultrasonic transducer connects, and the central axis distance of the connection place distance front shroud 5 of cant beam central axis and front shroud 5 is 25mm, and the middle part of the other end and straight beam connects, and the cross section length of side is 12
×12mm.The central axis of cant beam becomes 30 angles with the central axis of straight beam, and straight beam and cant beam are arc transition with the connection place of ultrasonic transducer front shroud 5 and connect, and transition arc radius is 5mm.
Friction-driven block 8 is by the bonding front end being arranged on elliptical vibration modal transducer 7, and friction-driven block 8 contacts with strip-shaped materials 9, and the spacing of two friction-driven blocks 8 is 40mm.The length of strip-shaped materials 9 is 90mm, the flange of single-excitation ultrasonic oval vibration energy converter is utilized to carry out installation and precompressed compression device, multiple oscillator is connected formation in aggregates single excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway, the single-excitation ultrasonic oval vibration energy converter axis after flange and support are fixed and the angle between horizontal surface are 75 degree.
The natural frequency of each oscillator of single excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway is 19.84KHz, impedance is 70 ~ 80 ohm, dynamic resistance is 14 ~ 25 ohm, the ultrasonic electric signal excitation of this feedway Zhi Xu mono-road, ultrasonic-frequency power supply 10 output voltage range is 0-400V, range of current is 0-4A, and output frequency is 19.84 ± 0.01KHz, and ultrasonic-frequency power supply 10 has automatic frequency tracking function in designated frequency range.
Shown in 4, after the ultrasonic electric signal of ultrasonic-frequency power supply 10 output is linked into the electrode slice 4 of single-excitation ultrasonic oval vibration energy converter, namely single-excitation ultrasonic oval vibration energy converter produces ultrasonic vibration, after ultrasonic vibrational energy is delivered to elliptical vibration modal transducer 7 end from single-excitation ultrasonic oval vibration energy converter, be converted to the vertical curved composite ultrasonic elliptical vibratory of longitudinal vibration and the bending vibrattion compound with certain phase difference, be namely converted to the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration modal transducer 7 end; And drive friction-driven block 8 to do ultrasonic elliptical vibratory together with elliptical vibration modal transducer 7 end.System after 10 minutes of running reaches steady state vibration state, the output voltage of ultrasonic-frequency power supply 10 is 220V, and electric current is 6.2A, after friction-driven block 8 contacts with strip-shaped materials 9, drive strip-shaped materials 9 to carry out continuous linear motion, strip-shaped materials 9 velocity peak values is 24.3mm/s.
When needs material rotates to another direction, by change-over swith, the electric signal that this ultrasonic-frequency power supply 10 exports is linked into the electrode slice 4 of other one group of oscillator, after another group oscillator runs 10 minutes continuously, ultrasonic-frequency power supply 10 output voltage is 220V, electric current is 6.3A, and strip-shaped materials 9 velocity peak values is 25.2mm/s.
Claims (6)
1. single excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway, it is characterized in that: single excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway adopts multiple oscillator as excitor, multiple oscillator is divided into two groups, two groups of oscillators alternately arrange in opposite directions, and each oscillator comprises single-excitation ultrasonic oval vibration energy converter, elliptical vibration modal transducer and friction-driven block; Described single-excitation ultrasonic oval vibration energy converter entirety is in cylinder, it comprises bolt and is set in back shroud, piezoelectric ceramic piece, electrode slice and the front shroud on bolt successively, front shroud is provided with the flange that can connect with other constructional device, back shroud, piezoelectric ceramic piece, electrode slice and front shroud are connected compression by bolt by back shroud and front shroud; Described elliptical vibration modal transducer is arranged on the front end of front shroud, described elliptical vibration modal transducer comprises the composite structure of straight beam and cant beam formation, straight beam and cant beam are rectangle perpendicular to the cross section of its central axis, the central axis of straight beam and the central axes of single-excitation ultrasonic oval vibration energy converter, one end of straight beam connects with the front shroud of ultrasonic transducer, and the other end overhangs; The side of one end of cant beam and the front shroud displaced central axis line of ultrasonic transducer connects, the middle part of the other end and straight beam connects, the central axis of cant beam becomes 0-90 degree angle with the central axis of straight beam, and straight beam and cant beam are arc transition with the connection place of ultrasonic transducer front shroud and connect; Described friction-driven block is arranged on the front end of elliptical vibration modal transducer; Single-excitation ultrasonic oval vibration energy converter axis after flange and support are fixed and the angle between horizontal surface are 0 degree ~ 90 degree, described oscillator is arranged along the direction of mass transport, its path is straight line path or curved path, described oscillator is along the single-row setting in direction of mass transport or multiple row is parallel arranges, and the distance that 3 oscillators of arbitrary continuation are arranged along mass transport direction is less than the length of institute's convey materials.
2. single excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway according to claim 1, is characterized in that: described elliptical vibration modal transducer and front shroud are made into the front end that is integrally provided in front shroud.
3. single excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway according to claim 1, is characterized in that: described elliptical vibration modal transducer welding is arranged on the front end of front shroud.
4. the list excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway according to claim 1 or 2 or 3, is characterized in that: described friction-driven block is arranged on the front end of elliptical vibration modal transducer by welding.
5. the list excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway according to claim 1 or 2 or 3, is characterized in that: described friction-driven block is by the bonding front end being arranged on elliptical vibration modal transducer.
6. the list excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway according to claim 1 or 2 or 3, is characterized in that: also comprise a joint bolt, for friction-driven block being connected in the front end of elliptical vibration modal transducer.
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| CN201410740174.1A CN104444135B (en) | 2014-12-09 | 2014-12-09 | A kind of single excitation ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device |
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| CN201410740174.1A CN104444135B (en) | 2014-12-09 | 2014-12-09 | A kind of single excitation ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600459A (en) * | 2020-11-11 | 2021-04-02 | 南京航空航天大学 | Linear piezoelectric transmission device based on static friction and working method thereof |
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| CN1474503A (en) * | 2003-07-30 | 2004-02-11 | 哈尔滨工业大学 | Supersonic motor standing wave driving vibrator capable of realizing linear or rotary movement |
| CN1777011A (en) * | 2005-12-07 | 2006-05-24 | 南京航空航天大学 | Linear motion stepping ultrasonic motor |
| CN103401470A (en) * | 2013-08-26 | 2013-11-20 | 苏州科技学院 | Bidirectional driving straight-line supersonic motor |
| CN204324230U (en) * | 2014-12-09 | 2015-05-13 | 苏州科技学院 | A kind of single excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway |
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2014
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1474503A (en) * | 2003-07-30 | 2004-02-11 | 哈尔滨工业大学 | Supersonic motor standing wave driving vibrator capable of realizing linear or rotary movement |
| CN1777011A (en) * | 2005-12-07 | 2006-05-24 | 南京航空航天大学 | Linear motion stepping ultrasonic motor |
| CN103401470A (en) * | 2013-08-26 | 2013-11-20 | 苏州科技学院 | Bidirectional driving straight-line supersonic motor |
| CN204324230U (en) * | 2014-12-09 | 2015-05-13 | 苏州科技学院 | A kind of single excitation ultrasonic elliptical vibratory many oscillators bidirectional material feedway |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600459A (en) * | 2020-11-11 | 2021-04-02 | 南京航空航天大学 | Linear piezoelectric transmission device based on static friction and working method thereof |
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Address after: 215009 Suzhou City, Jiangsu province high tech Zone CREE Road, No. 1 Applicant after: Suzhou University of Science and Technology Address before: 215009 Suzhou City, Jiangsu province high tech Zone CREE Road, No. 1 Applicant before: University of Science and Technology of Suzhou |
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Inventor after: Yin Zhen Inventor after: Li Yan Inventor after: Li Hua Inventor after: Guo Lihua Inventor after: Yang Xinming Inventor after: Zhang Lei Inventor after: Wu Lei Inventor after: Xu Tie Inventor before: Wu Yongzhi Inventor before: Yin Zhen Inventor before: Li Yan Inventor before: Liu Yisheng |
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