CN104410322A - Single electric signal excited ultrasound elliptic-vibration multi-vibrator material conveying device - Google Patents
Single electric signal excited ultrasound elliptic-vibration multi-vibrator material conveying device Download PDFInfo
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- CN104410322A CN104410322A CN201410740450.4A CN201410740450A CN104410322A CN 104410322 A CN104410322 A CN 104410322A CN 201410740450 A CN201410740450 A CN 201410740450A CN 104410322 A CN104410322 A CN 104410322A
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Abstract
The invention discloses a single electric signal excited ultrasound elliptic-vibration multi-vibrator material conveying device which is mainly used for accurately and precisely conveying strip-shaped materials. The material conveying device disclosed by the invention uses a plurality of vibrators as excitation bodies, wherein each of the vibrators comprises an ultrasonic vibration transducer, an elliptic vibration mode converter, and a friction driving block arranged at the front end of the elliptic vibration mode converter; each of the ultrasonic vibration transducers comprises a bolt, a rear cover plate, a piezoelectric ceramic piece, an electrode plate and a front cover plate, which are sequentially arranged on the bolt in a sleeving manner, and the rear cover plate, the piezoelectric ceramic piece, the electrode plate and the front cover plate are connected and pressed tightly through the bolt ; the elliptic vibration mode converters are arranged at the front ends of the ultrasonic vibration transducers; the whole bodies of the elliptic vibration mode converters are cylindrical; three dislocated rectangular gaps are respectively formed in the left side and the right side; the elliptic vibration mode converters can convert the longitudinal ultrasonic vibration generated by the ultrasonic vibration transducers into longitudinal compound ultrasonic elliptic vibration at the tail ends of the elliptic vibration mode converters and on the friction driving blocks. When the vibrators work at the same time, the vibrators drive the strip-shaped materials to continuously move.
Description
Technical field
The present invention relates to the accurate transportation art of the vibration utilizing piezoelectric ceramic inverse piezoelectric effect, especially relate to a kind of single-electrical signal that utilizes and encourage generation ultrasonic elliptical vibratory to carry out the many oscillators device for transporting objects driven.
Background technology
The field such as automated production processing and assembling such as to prepare 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 action 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 environmental suitability is strong, obtains increasingly extensive application in technical fields such as medical treatment, Aero-Space, robot, MEMS.
But existing traveling-wave ultrasonic conveying device also exist row wave attenuation compared with large, long distance delivery be restricted be difficult to realize, material in delivered length maldistribution, complex structure, power 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 single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects, 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 useful life and improve system works stability.
A kind of single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects, it adopts multiple oscillator as excitor, 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 outline is cylindrical, 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 ring 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-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects, 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, or elliptical vibration modal transducer is arranged on the front end of front shroud by screw attachment, described elliptical vibration modal transducer entirety is cylindrical, and the left and right sides offers three rectangular indentation be dislocatedly distributed; Transition arc is provided with in the connection place of elliptical vibration modal transducer and ultrasonic transducer front shroud.
The sub-assembly that elliptical vibration modal transducer is formed after being arranged on single-excitation ultrasonic oval vibration energy converter front end is called single-electrical signal excitation ultrasonic elliptical vibratory transducer, the object offering rectangular indentation in the elliptical vibration modal transducer left and right sides is the mode of oscillation in order to change single-electrical signal excitation ultrasonic elliptical vibratory transducer, make its longitudinal vibration mode frequency and flexural vibration mode frequency close to or equal.
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 should be greater than the spacing of two friction-driven blocks of 2 times, and the spacing that namely described oscillator is arranged along mass transport direction is less than the half of institute's convey materials length.The ring flange of single-excitation ultrasonic oval vibration energy converter is used for installing oscillator and precompression device, multiple oscillator is connected formation single-electrical signal in aggregates excitation ultrasonic elliptical vibratory many oscillators device for transporting objects, the single-excitation ultrasonic oval vibration energy converter axis after ring flange and support are fixed and the angle between horizontal plane are 0 degree ~ 90 degree.
Described oscillator is along the direction spaced set of mass transport, and 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.
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 extensional vibration and the flexural vibrations 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.Compare the device for transporting objects that existing document is introduced, this single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects has that power capacity 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 single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects all only has one group of extensional vibration piezoelectric ceramic piece.
Further, multiple oscillator Zhi Xu mono-roads ultrasonic electric signal excitation of described single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects.
Present invention employs the vertical curved composite ultrasonic elliptical vibratory that mechanical oscillation MODAL TRANSFORMATION OF A mechanism is converted to the extensional vibration of single-excitation ultrasonic oval vibration energy converter elliptical vibration modal transducer end and vibration head, simplify the overall structure of ultrasonic elliptical vibratory many oscillators device for transporting objects, greatly reduce the complexity of vibrational system, reduce manufacture, assembly difficulty and production cost, whole ultrasonic elliptical vibratory many oscillators device for transporting objects structure is simple, easy to manufacture, is conducive to the realization of microminiaturized 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 microminiaturization realizing control circuit and ultrasonic-frequency power supply, integrated, improve reliability, service behaviour 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-electrical signal excitation ultrasonic elliptical vibratory transducer in the present invention.
Fig. 3 is the left view of single-electrical signal 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. ring flange, 7. elliptical vibration modal transducer, 8. friction-driven block, 9. strip-shaped materials, 10. ultrasonic-frequency power supply, 11. rectangular indentation.
Embodiment
Shown in composition graphs 1,2,3, a kind of single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects, it adopts 5 oscillators as excitor, 5 aligned spaced sets of oscillator, and 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 outline is cylindrical, it comprises bolt 1 and is set in the back shroud 2 on bolt 1 successively, piezoelectric ceramic piece 3, electrode slice 4 and front shroud 5, front shroud 5 is provided with the ring flange 6 that can connect with other constructional device, back shroud 2 and front shroud 5 pass through bolt 1 by back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and front shroud 5 connect compression, constitute the energy conversion part of single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects, 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 single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects only has one group of extensional vibration piezoelectric ceramic piece 3, transducer piezoelectric ceramic 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, are provided with transition arc at elliptical vibration modal transducer 7 and the connection place of ultrasonic transducer front shroud 5.Transition arc radius is 5mm, elliptical vibration modal transducer 7 entirety is cylindrical, the left and right sides offers three rectangular indentation be dislocatedly distributed 11, three rectangular indentation 11 width are 6mm, and the degree of depth is 3mm, and the distance of the centre-to-centre spacing front end face of three rectangular indentation 11 is respectively 15mm, 25mm, 35mm.
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 ring flange 6 of single-excitation ultrasonic oval vibration energy converter is utilized to carry out installation and precompression device, multiple oscillator is connected formation single-electrical signal in aggregates excitation ultrasonic elliptical vibratory many oscillators device for transporting objects, the single-excitation ultrasonic oval vibration energy converter axis after ring flange 6 and support are fixed and the angle between horizontal plane are 75 degree.
The natural frequency of each oscillator of single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects is 19.84KHz, impedance is 70 ~ 80 ohm, dynamic electric resistor is 14 ~ 25 ohm, this conveying device Zhi Xu mono-road ultrasonic electric signal excitation, ultrasonic-frequency power supply 10 output voltage range is 0-400V, current range 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 composition graphs 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 extensional vibration and the flexural vibrations 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 stable vibration state, the output voltage of ultrasonic-frequency power supply 10 is 220V, and electric current is 11.8A, after friction-driven block 8 contacts with strip-shaped materials 9, drive strip-shaped materials 9 to carry out continuous linear motion, the velocity peak values of strip-shaped materials 9 is 24.3mm/s.
Claims (6)
1. single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects, it is characterized in that: single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects adopts multiple oscillator as excitor, 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 outline is cylindrical, 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 ring 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 entirety is cylindrical, the left and right sides offers three rectangular indentation be dislocatedly distributed, and is provided with transition arc in the connection place of elliptical vibration modal transducer and ultrasonic transducer front shroud; Described friction-driven block is arranged on the front end of elliptical vibration modal transducer; Single-excitation ultrasonic oval vibration energy converter axis after ring flange and support are fixed and the angle between horizontal plane are 0 ~ 90 degree; Described oscillator is along the direction spaced set 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 spacing that described oscillator is arranged along mass transport direction is less than the half of institute's convey materials length.
2. single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects 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-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects 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 single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects 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 single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects 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 single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects 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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| CN201410740450.4A CN104410322A (en) | 2014-12-09 | 2014-12-09 | Single electric signal excited ultrasound elliptic-vibration multi-vibrator material conveying device |
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| CN203225675U (en) * | 2013-05-08 | 2013-10-02 | 苏州科技学院 | Bidirectional-driving linear ultrasonic motor |
| CN203253608U (en) * | 2013-05-08 | 2013-10-30 | 苏州科技学院 | Single-actuator ultrasonic elliptical vibration transducer |
| CN103414373A (en) * | 2013-08-26 | 2013-11-27 | 苏州科技学院 | Single-incentive rotating ultrasonic motor |
| CN204271933U (en) * | 2014-12-09 | 2015-04-15 | 苏州科技学院 | A kind of single-electrical signal excitation ultrasonic elliptical vibratory many oscillators device for transporting objects |
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- 2014-12-09 CN CN201410740450.4A patent/CN104410322A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203225675U (en) * | 2013-05-08 | 2013-10-02 | 苏州科技学院 | Bidirectional-driving linear ultrasonic motor |
| CN203253608U (en) * | 2013-05-08 | 2013-10-30 | 苏州科技学院 | Single-actuator ultrasonic elliptical vibration transducer |
| CN103414373A (en) * | 2013-08-26 | 2013-11-27 | 苏州科技学院 | Single-incentive rotating ultrasonic motor |
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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 Hua Inventor after: Cao Ziyang Inventor after: Liu Yisheng Inventor after: Zhu Zhanjun Inventor after: Zhang Shuai Inventor after: Zhang Lei Inventor after: Yang Xinming Inventor before: Wu Yongzhi Inventor before: Yin Zhen Inventor before: Li Yan Inventor before: Liu Yisheng |
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Application publication date: 20150311 |