CN104444135B - A kind of single excitation ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device - Google Patents
A kind of single excitation ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device Download PDFInfo
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- CN104444135B CN104444135B CN201410740174.1A CN201410740174A CN104444135B CN 104444135 B CN104444135 B CN 104444135B CN 201410740174 A CN201410740174 A CN 201410740174A CN 104444135 B CN104444135 B CN 104444135B
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Abstract
The invention discloses a kind of single excitation ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device, it is mainly used in the most accurate conveying of strip-shaped materials, the present invention uses multiple oscillator as excitor, multiple oscillators are divided into two groups, two groups of oscillators alternately arrange in opposite directions, and each oscillator includes single-excitation ultrasonic oval vibration energy converter, elliptical vibration modal transducer and is arranged on the friction-driven block of elliptical vibration modal transducer front end；Described single-excitation ultrasonic oval vibration energy converter includes that back shroud, piezoelectric ceramic piece, electrode slice and front shroud are coupled compression by bolt by bolt and the back shroud being sequentially sleeved on bolt, piezoelectric ceramic piece, electrode slice and front shroud, back shroud and front shroud；Elliptical vibration modal transducer is arranged on the front end of single-excitation ultrasonic oval vibration energy converter, for straight beam and the composite construction of cant beam, the longitudinal ultrasonic vibration that single-excitation ultrasonic oval vibration energy converter produces can be converted to the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration modal transducer end and friction-driven block by this elliptical vibration modal transducer, when two groups of different oscillators are operated respectively, corresponding two groups of friction-driven blocks drive strip-shaped materials to carry out two-way continuous motion respectively, it is achieved the two-way accurate conveying of strip-shaped materials.
Description
Technical field
The present invention relates to the use of the vibration precision transportation art of piezoelectric ceramics inverse piezoelectric effect, especially relate to a kind of many oscillators material Bidirectional conveying device utilizing single excitation ultrasonic elliptical vibratory to be driven.
Background technology
The field such as automated production processing and assembling such as prepare at medicine, chemical industry, food, machinery, material, material and the transmission of parts and assembling, have been used up traditional low-frequency high-amplitude electric and magnetic oscillation transmitting device, during the work of this device, noise is more, dispensing precision is low, being not easy to realize precise closed-loop control, power volume is little, and these problems govern the raising of accurate transmission systematic entirety energy always.
The excess sound pressure electric drive having developed rapidly and having applied since the eighties in 20 century provides opportunity for accurate transmission system, it is by the rubbing action between stator and mover, the micro breadth oscillation of elastomer is converted into macroscopical straight line (rotation) motion of mover, pushes directly on load.Because of its have that volume is little, lightweight, low-speed big, noise are little, response is fast, positioning precision is high, without advantages such as electromagnetic interference and environmental suitability are strong, obtained increasingly extensive application in technical fields such as medical treatment, Aero-Space, robot, MEMS.
But existing traveling-wave ultrasonic conveyer device also exist row wave attenuation be restricted compared with big, long distance delivery be difficult to, material maldistribution, deficiency such as structure is complicated, output is little, manufactures is difficult, and life-span higher, relatively costly to manufacture matching requirements is short in delivered length.These problems constrain they 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 conveyer device, purpose is not enough in order to overcome present in existing material precision conveying device, simplify vibration precision conveying device structure, reduce manufacture difficulty, reduce cost, raising service life and improve system job stability.
A kind of single excitation ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device, it uses multiple oscillator as excitor, multiple oscillators are divided into two groups, and two groups of oscillators alternately arrange in opposite directions, and each oscillator includes single-excitation ultrasonic oval vibration energy converter, elliptical vibration modal transducer and friction-driven block；Described single-excitation ultrasonic oval vibration energy converter is overall in cylinder, it includes bolt and the back shroud being sequentially sleeved on bolt, piezoelectric ceramic piece, electrode slice and front shroud, it is provided with the ring flange that can couple with other constructional device, back shroud and front shroud on front shroud, by bolt, back shroud, piezoelectric ceramic piece, electrode slice and front shroud is coupled compression；Constitute single energy conversion part encouraging ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device, 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 fabricated to a front end being 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 includes the composite construction that straight beam and cant beam are constituted, straight beam and cant beam are perpendicular to the cross section of its center axis and are rectangle, the central axis of straight beam and the central axes of single-excitation ultrasonic oval vibration energy converter, one end of straight beam couples with the front shroud of ultrasonic transducer, and the other end overhangs；The side of one end of cant beam and the front shroud off-center axis of ultrasonic transducer couples, the middle part of the other end and straight beam couples, the central axis of cant beam becomes 0-90 degree angle, straight beam and cant beam to be arc transition with the connection place of ultrasonic transducer front shroud to couple with the central axis of straight beam.
The molectron that elliptical vibration modal transducer is constituted after being arranged on single-excitation ultrasonic oval vibration energy converter front end is referred to as single excitation ultrasonic elliptical vibratory transducer, elliptical vibration modal transducer is that the purpose of straight beam and cant beam composite construction is in order to change single mode of oscillation encouraging ultrasonic elliptical vibratory transducer so that it is longitudinal vibration mode frequency and flexural vibration mode frequency are close or equal；Existence due to oblique beam structure, the longitudinal ultrasonic vibration that single-excitation ultrasonic oval vibration energy converter produces is after being delivered to cant beam, it is decomposed into a part of extensional vibration component and a part of bending vibration component at cant beam root, the extensional vibration component that decomposes when cant beam and after bending vibration component is delivered to straight beam, it is combined mutually with the extensional vibration propagated on straight beam, finally in the formation of straight beam end, there is the extensional vibration component of certain phase contrast and the ultrasonic elliptical vibratory that bending vibration component is 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 distance that the length of strip-shaped materials is arranged along material conveying direction more than the distance between 3 friction-driven blocks of arbitrary continuation, i.e. 3 oscillators of arbitrary continuation is less than carried material length.The ring flange of single-excitation ultrasonic oval vibration energy converter is used for installing oscillator and precompression device, multiple oscillators connecting into one and is monolithically fabricated single excitation ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device, the angle between single-excitation ultrasonic oval vibration energy converter axis and horizontal plane after ring flange and support are fixing is 0 degree ~ 90 degree.
Described oscillator is arranged along the direction that material carries, and its path is straight line path or curved path, and described oscillator is arranged parallel along the single-row setting in the direction that material carries or multiple row.
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, single-excitation ultrasonic oval vibration energy converter i.e. produces supersonic vibration, ultrasonic vibrational energy is after single-excitation ultrasonic oval vibration energy converter is delivered to elliptical vibration modal transducer end, the extensional vibration being converted to there is certain phase contrast and the compound vertical curved composite ultrasonic elliptical vibratory of bending vibration, i.e. be converted to the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration modal transducer end, 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 is operated respectively, corresponding two groups of friction-driven blocks drive strip-shaped materials to carry out two-way continuous motion respectively, it is achieved the two-way accurate conveying of strip-shaped materials.Compare the device for transporting objects that existing document is introduced, the advantages such as this list excitation ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device has that power capacity is big, energy conversion efficiency is high, simple in construction, easy to manufacture, low cost, the rigidity of structure big, it is simple to control drive system and vibration performance is stable.
Further, each oscillator of described list excitation ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device all only has one group of extensional 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 conveyer device.
Present invention employs mechanical vibration MODAL TRANSFORMATION OF A mechanism and the extensional vibration of single-excitation ultrasonic oval vibration energy converter is changed the extensional vibration being decomposed into straight beam, the extensional vibration of cant beam and bending vibration component, finally synthesize vertical curved composite ultrasonic elliptical vibratory at straight beam end, simplify single overall structure encouraging ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device, greatly reduce the complexity of vibrational system, reduce manufacture, assembly difficulty and production cost, whole single excitation ultrasonic elliptical vibratory many oscillators bidirectional material transport conveyor constructions is simple, easy to manufacture, be conducive to being miniaturized the realization of target；Additionally this invention only needs a road control circuit and ultrasonic electric signal to encourage, control difficulty low, avoid two-phase or multiphase supersonic vibration and be compounded to form the complicated ultrasonic-frequency power supply development cost of 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, it is easily achieved the miniaturization of 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 the structural representation of the present invention.
Fig. 2 is single front view encouraging ultrasonic elliptical vibratory transducer in the present invention.
Fig. 3 is single left view encouraging ultrasonic elliptical vibratory transducer in the present invention.
Fig. 4 is the application example schematic diagram of the present invention.
Label declaration in figure: 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.
Detailed description of the invention
Shown in Fig. 1,2,3, a kind of list encourages ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device, and it uses 10 oscillators as excitor, and every 5 oscillators are divided into one group, and two groups of oscillators are aligned along the direction single file of conveying materials the most in opposite directions.Each oscillator includes single-excitation ultrasonic oval vibration energy converter, elliptical vibration modal transducer 7 and friction-driven block 8；Single-excitation ultrasonic oval vibration energy converter is overall in cylinder, it includes bolt 1 and the back shroud 2 being sequentially sleeved on bolt 1, piezoelectric ceramic piece 3, electrode slice 4 and front shroud 5, the ring flange 6 that can couple it is provided with other constructional device on front shroud 5, back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and front shroud 5 are coupled compression by bolt 1 by back shroud 2 and front shroud 5, constituting single energy conversion part encouraging ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device, 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 conveyer device only has one group of extensional vibration piezoelectric ceramic piece 3, piezoelectric ceramic transducer section diameter 30mm, and the material of piezoelectric ceramic piece 3 is PZT-8, 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 fabricated to an one-piece parts and are arranged on the front end of front shroud 5, elliptical vibration modal transducer 7 includes the composite construction that straight beam and cant beam are constituted, straight beam and cant beam are perpendicular to the cross section of its center axis and are rectangle, the central axis of straight beam and the central axes of single-excitation ultrasonic oval vibration energy converter, one end of straight beam couples 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 off-center axis of ultrasonic transducer couples, and the middle part that central axis distance is 25mm, the other end and straight beam of the connection place distance front shroud 5 of cant beam central axis and front shroud 5 couples, and the cross section length of side is 12×12mm.The central axis of cant beam becomes 30 angles, straight beam and cant beam to be arc transition with the connection place of ultrasonic transducer front shroud 5 to couple with the central axis of straight beam, 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 a length of 90mm of strip-shaped materials 9, the ring flange utilizing single-excitation ultrasonic oval vibration energy converter carries out installing and precompression device, multiple oscillators connecting into one and is monolithically fabricated single excitation ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device, the angle between single-excitation ultrasonic oval vibration energy converter axis and horizontal plane after ring flange and support are fixing is 75 degree.
The natural frequency of single excitation ultrasonic elliptical vibratory many oscillators each oscillator of bidirectional material conveyer device is 19.84KHz, impedance is 70 ~ 80 ohm, dynamic electric resistor is 14 ~ 25 ohm, the ultrasonic electric signal excitation of this conveyer device Zhi Xu mono-road, 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 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, single-excitation ultrasonic oval vibration energy converter i.e. produces supersonic vibration, ultrasonic vibrational energy is after single-excitation ultrasonic oval vibration energy converter is delivered to elliptical vibration modal transducer 7 end, the extensional vibration being converted to have certain phase contrast and the compound vertical curved composite ultrasonic elliptical vibratory of bending vibration, be i.e. 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.After running 10 minutes, system reaches stable vibration state, and 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, drives strip-shaped materials 9 to carry out continuous linear motion, and strip-shaped materials 9 velocity peak values is 24.3mm/s.
When needs material rotates to another direction, by permutator, the signal of telecommunication that this ultrasonic-frequency power supply 10 exports is linked into the electrode slice 4 of another set 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 conveyer device, it is characterized in that: single excitation ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device uses multiple oscillators as excitor, multiple oscillators are divided into two groups, two groups of oscillators alternately arrange in opposite directions, and each oscillator includes single-excitation ultrasonic oval vibration energy converter, elliptical vibration modal transducer and friction-driven block；Described single-excitation ultrasonic oval vibration energy converter is overall in cylinder, it includes bolt and the back shroud being sequentially sleeved on bolt, piezoelectric ceramic piece, electrode slice and front shroud, it is provided with the ring flange that can couple with other constructional device, back shroud and front shroud on front shroud, by bolt, back shroud, piezoelectric ceramic piece, electrode slice and front shroud is coupled compression；Described elliptical vibration modal transducer is arranged on the front end of front shroud, described elliptical vibration modal transducer includes the composite construction that straight beam and cant beam are constituted, straight beam and cant beam are perpendicular to the cross section of its center axis and are rectangle, the central axis of straight beam and the central axes of single-excitation ultrasonic oval vibration energy converter, one end of straight beam couples with the front shroud of ultrasonic transducer, and the other end overhangs；The side of one end of cant beam and the front shroud off-center axis of ultrasonic transducer couples, the middle part of the other end and straight beam couples, the central axis of cant beam becomes 0-90 degree angle, straight beam and cant beam to be arc transition with the connection place of ultrasonic transducer front shroud to couple with the central axis of straight beam；Described friction-driven block is arranged on the front end of elliptical vibration modal transducer；The angle between single-excitation ultrasonic oval vibration energy converter axis and horizontal plane after ring flange and support are fixing is 0 degree ~ 90 degree, described oscillator is arranged along the direction that material carries, its path is straight line path or curved path, described oscillator is arranged parallel along the single-row setting in the direction that material carries or multiple row, and 3 oscillators of arbitrary continuation are less than the length of carried material along the distance that material conveying direction is arranged；Each oscillator of described list excitation ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device all only has one group of extensional vibration piezoelectric ceramic piece；Two groups of oscillator Zhi Xu mono-road ultrasonic electric signal excitations of described list excitation ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device.
Single excitation ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device the most according to claim 1, it is characterised in that: described elliptical vibration modal transducer and front shroud are fabricated to a front end being integrally provided in front shroud.
Single excitation ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device the most according to claim 1, it is characterised in that: described elliptical vibration modal transducer welding is arranged on the front end of front shroud.
4. encourage ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device according to the list described in claim 1 or 2 or 3, it is characterised in that: described friction-driven block is arranged on the front end of elliptical vibration modal transducer by welding.
5. encourage ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device according to the list described in claim 1 or 2 or 3, it is characterised in that: described friction-driven block passes through the bonding front end being arranged on elliptical vibration modal transducer.
6. encourage ultrasonic elliptical vibratory many oscillators bidirectional material conveyer device according to the list described in claim 1 or 2 or 3, it is characterised in that: also include a joint bolt, for friction-driven block being connected in the front end of elliptical vibration modal transducer.
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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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