CN103195772A - Low-frictional-characteristic air cylinder with piezoelectrically actuated cylinder barrel deviously vibrating - Google Patents
Low-frictional-characteristic air cylinder with piezoelectrically actuated cylinder barrel deviously vibrating Download PDFInfo
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- CN103195772A CN103195772A CN2013101325449A CN201310132544A CN103195772A CN 103195772 A CN103195772 A CN 103195772A CN 2013101325449 A CN2013101325449 A CN 2013101325449A CN 201310132544 A CN201310132544 A CN 201310132544A CN 103195772 A CN103195772 A CN 103195772A
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Abstract
The invention discloses a low-frictional-characteristic air cylinder with a piezoelectrically actuated cylinder barrel deviously vibrating, and belongs to the technical field of pneumatics, particularly the technical field for lowering a frictional coefficient of an air cylinder. In order to realize reduction of the frictional coefficient of the air cylinder conveniently, quickly and flexibly, a plurality of planes which are opposite pairwise are arranged around the periphery of an outer circular face of a cylinder barrel of an air cylinder assembly, one or more piezoelectric extension pieces are arranged on each of the planes, one plane of each piezoelectric extension piece is enabled to be connected with the plane, when a plurality of piezoelectric extension pieces are arranged on each of the planes, all the piezoelectric extension pieces arranged on the plane are arranged along the axial direction of the cylinder barrel of the air cylinder assembly, extension direction of the piezoelectric extension pieces is parallel to an axis of the cylinder barrel of the air cylinder assembly, and frequency of driving voltage of the piezoelectric extension pieces is identical or close to intrinsic bending vibration frequency of the cylinder barrel. By the low-frictional-characteristic air cylinder with the piezoelectrically actuated cylinder barrel deviously vibrating, when the piezoelectric extension pieces input a driving signal, the frictional coefficient of a piston and the cylinder barrel can be lowered.
Description
Technical field
The invention belongs to the pneumatics field, specifically is the technical field that reduces the cylinder friction factor.
Background technique
The cylinder creeping phenomenon has a strong impact on the robust motion of cylinder.For effectively eliminating creeping phenomenon, improve cylinder low cruise characteristic, a kind of known method is the frictional force that compensates cylinder by the mode at control signal stack vibrating signal, eliminates the directivity of Pneumatic Cylinder with Friction, thereby has alleviated the cylinder creeping phenomenon.But the frequency of vibrating signal and amplitude are difficult to appropriate assurance when practical application, usually bring side effects such as noise, shake.
Another kind method is to utilize the air supporting effect to introduce one deck air film between the cylinder friction pair.Piston is not directly contacted with metal cylinder barrel, thereby obviously reduce the difference of cylinder sound frictional force, the cylinder creeping phenomenon is greatly improved.As patent CN102155465A.Yet the low friction of this air supporting cylinder has proposed very high request to the machining accuracy of each component of cylinder, and had great difficulty in the manufacturing of the low friction of large-sized air supporting cylinder in manufacture process.Also having a kind of method is in the occasion that low-speed performance is had relatively high expectations, and gas-liquid combination-controlled servo-system is used often.The mode of the damping by increasing system, the very big improvement of having creeped of cylinder low speed.But this system often volume strengthens, and easily introduces oil contamination.
Summary of the invention
Realize reducing the friction factor of cylinder for convenience, fast, neatly, the present invention proposes the low frictional behavior cylinder that a kind of piezoelectricity causes the cylinder barrel flexure vibrations.
Described piezoelectricity causes the low frictional behavior cylinder of cylinder barrel flexure vibrations, is made up of cylinder assembly, multi-disc piezoelectricity stretchable sheet;
On the periphery of the cylinder barrel of cylinder assembly, be provided with a plurality of planes facing each other around circumferencial direction, total number on plane is 2 multiple, be provided with one or more pieces piezoelectricity stretchable sheets on each plane, and the number of the piezoelectricity stretchable sheet on each plane equates, and a plane of every piezoelectricity stretchable sheet all is connected with the plane, when being provided with a plurality of piezoelectricity stretchable sheet, all the piezoelectricity stretchable sheets on this face are all arranged along the axial direction of the cylinder barrel of cylinder assembly on each plane; The flexible direction of described piezoelectricity stretchable sheet is parallel with the axis of the cylinder barrel of cylinder assembly; The frequency that described piezoelectricity stretchable sheet drives ac signal is identical or close with the intrinsic beam frequency of cylinder barrel correspondence itself; The driving mode of multi-disc piezoelectricity stretchable sheet is row wave excitation mode of operation or standing wave exciting mode of operation; Described capable wave excitation mode of operation is driving phase difference 180 degree of the piezoelectricity stretchable sheet on per two opposite planar, driving phase difference 180 degree of the adjacent piezoelectricity stretchable sheet on each plane, piezoelectricity stretchable sheet on per two opposite planar drives successively so that circumference is adjacent, driving phase difference 90 degree of the piezoelectricity stretchable sheet on the circumference adjacent plane; Described standing wave exciting mode of operation is that each or several piezoelectricity stretchable sheet can drive separately or in groups, and the driving phase difference of each or every group of piezoelectricity stretchable sheet can be 0 degree.
The present invention can make the friction factor of piston and cylinder barrel reduce when piezoelectricity stretchable sheet input drive signal.It also has simple in structure, easy processing, easy to maintenance and be easy to control.The present invention has a wide range of applications in the low speed cylinder field.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is that the A-A of cylinder barrel among Fig. 1 is to the sectional structure schematic representation.
Embodiment
Embodiment one:Describe referring to Fig. 1, Fig. 2, this embodiment is made up of cylinder assembly 1, multi-disc piezoelectricity stretchable sheet 2;
On the periphery of the cylinder barrel of cylinder assembly 1, be provided with a plurality of plane 1-1 facing each other around circumferencial direction, total number of plane 1-1 is 4 multiple, be provided with one or more pieces piezoelectricity stretchable sheets 2 on each plane 1-1, and the number of the piezoelectricity stretchable sheet 2 on each plane 1-1 equates, and a plane of every piezoelectricity stretchable sheet 2 all is connected with plane 1-1, each plane 1-1 goes up when being provided with a plurality of piezoelectricity stretchable sheet 2, and all the piezoelectricity stretchable sheets 2 on this face are all arranged along the axial direction of the cylinder barrel of cylinder assembly 1; The flexible direction of described piezoelectricity stretchable sheet 2 is parallel with the axis of the cylinder barrel of cylinder assembly 1; The frequency that described piezoelectricity stretchable sheet 2 drives ac signal is identical or close with the intrinsic beam frequency of cylinder barrel correspondence itself; The driving mode of multi-disc piezoelectricity stretchable sheet 2 is row wave excitation mode of operation or standing wave exciting mode of operation; Described capable wave excitation mode of operation is driving phase difference 180 degree of the piezoelectricity stretchable sheet 2 on per two opposite planar 1-1, driving phase difference 180 degree of the adjacent piezoelectricity stretchable sheet 2 on each plane 1-1, piezoelectricity stretchable sheet 2 on per two opposite planar 1-1 drives successively so that circumference is adjacent, driving phase difference 90 degree of the piezoelectricity stretchable sheet 2 on the circumference adjacent plane 1-1; Described standing wave exciting mode of operation is that each or several piezoelectricity stretchable sheet 2 can drive separately or in groups, and the driving phase difference of each or every group of piezoelectricity stretchable sheet 2 can be 0 degree.
A plane of described every piezoelectricity stretchable sheet 2 all can be bonding, cold welding, chemical method with the Placement of plane 1-1.
The waveform of the driving ac signal of described piezoelectricity stretchable sheet 2 can be sinusoidal waveform ac signal, square waveform ac signal, triangular waveform ac signal or zigzag fashion ac signal.
Described piezoelectricity stretchable sheet 2 replaceable one-tenth magnetostriction sheets, photo-induced telescopic sheet or thermic stretchable sheet.
The material of the cylinder barrel of described cylinder assembly 1 is titanium alloy, Cuprum alloy, alloyed steel or aluminum alloy.
Embodiment two:Describe referring to Fig. 1, Fig. 2, the difference of this embodiment and embodiment one is that described each plane 1-1 goes up when being provided with a plurality of piezoelectricity stretchable sheet 2, and all the piezoelectricity stretchable sheets 2 on this face are all evenly distributed along the axial direction of the cylinder barrel of cylinder assembly 1.Other composition is identical with embodiment one with annexation.
Working principle: it is by driving piezoelectricity stretchable sheet 2, make the cylinder barrel of cylinder assembly 1 be in high frequency flexure vibrations state, the antifriction effect of utilizing the high frequency flexure vibrations of cylinder barrel to produce reduces the friction factor of piston and cylinder barrel, thereby makes cylinder have low frictional behavior.
Pass to intrinsic the beam frequency identical or close sinusoidal ac corresponding with cylinder barrel itself for all piezoelectricity stretchable sheets 2, then two piezoelectricity stretchable sheets on each face can produce simultaneously along the distortion of their length direction correspondences, thereby exciting goes out the flexure vibrations of cylinder barrel.During the ripple of being expert at drives, by the non-conterminous principle in plane all piezoelectricity stretchable sheets are divided into two groups, pass to the sinusoidal ac that phase difference is 90 degree for two groups of piezoelectricity stretchable sheets, cylinder barrel ground connection, then can spatially encourage and produce two mutually orthogonal flexure vibrations standing waves, thereby be coupled into flexure vibrations row ripple, and then reduce the cylinder friction factor.In standing wave drives, by the non-conterminous principle in plane all piezoelectricity stretchable sheets are divided into two groups, only giving wherein, one group of piezoelectricity stretchable sheet passes to intrinsic the beam frequency identical or close sinusoidal ac corresponding with cylinder barrel itself, another group and cylinder barrel ground connection, thereby motivate corresponding cylinder barrel flexural vibration mode, and then reduce the cylinder friction factor.
Claims (4)
1. piezoelectricity causes the low frictional behavior cylinder of cylinder barrel flexure vibrations, it is characterized in that it is made up of cylinder assembly (1), multi-disc piezoelectricity stretchable sheet (2);
On the periphery of the cylinder barrel of cylinder assembly (1), be provided with a plurality of planes facing each other (1-1) around circumferencial direction, total number on plane (1-1) is 2 multiple, be provided with one or more pieces piezoelectricity stretchable sheets (2) on each plane (1-1), and the number of the piezoelectricity stretchable sheet (2) on each plane (1-1) equates, and a plane of every piezoelectricity stretchable sheet (2) all is connected with plane (1-1), go up when being provided with a plurality of piezoelectricity stretchable sheets (2) on each plane (1-1), and all the piezoelectricity stretchable sheets (2) on this face are all arranged along the axial direction of the cylinder barrel of cylinder assembly (1); The flexible direction of described piezoelectricity stretchable sheet (2) is parallel with the axis of the cylinder barrel of cylinder assembly (1); The frequency that described piezoelectricity stretchable sheet (2) drives ac signal is identical or close with the intrinsic beam frequency of cylinder barrel correspondence itself; The driving mode of multi-disc piezoelectricity stretchable sheet (2) is row wave excitation mode of operation or standing wave exciting mode of operation; Described capable wave excitation mode of operation is driving phase difference 180 degree of the piezoelectricity stretchable sheet (2) on per two opposite planar (1-1), driving phase difference 180 degree of the adjacent piezoelectricity stretchable sheet (2) on each plane (1-1), piezoelectricity stretchable sheet (2) on per two opposite planar (1-1) drives successively so that circumference is adjacent, driving phase difference 90 degree of the piezoelectricity stretchable sheet (2) on the circumference adjacent plane (1-1); Described standing wave exciting mode of operation is that each or several piezoelectricity stretchable sheet (2) can drive separately or in groups, and the driving phase difference of each or every group of piezoelectricity stretchable sheet (2) can be 0 degree.
2. piezoelectricity according to claim 1 causes the low frictional behavior cylinder of cylinder barrel flexure vibrations, it is characterized in that described each plane (1-1) goes up when being provided with a plurality of piezoelectricity stretchable sheets (2), all the piezoelectricity stretchable sheets (2) on this face are all evenly distributed along the axial direction of the cylinder barrel of cylinder assembly (1).
3. piezoelectricity according to claim 1 causes the low frictional behavior cylinder of cylinder barrel flexure vibrations, it is characterized in that the waveform of the driving ac signal of described piezoelectricity stretchable sheet (2) can be sinusoidal waveform ac signal, square waveform ac signal, triangular waveform ac signal or zigzag fashion ac signal.
4. piezoelectricity according to claim 1 causes the low frictional behavior cylinder of cylinder barrel flexure vibrations, and a plane that it is characterized in that described every piezoelectricity stretchable sheet (2) all can be bonding, cold welding, chemical method with the Placement of plane (1-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310132544.9A CN103195772B (en) | 2013-04-17 | 2013-04-17 | Piezoelectricity causes the low frictional behavior cylinder of cylinder barrel flexural vibrations |
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| CN201310132544.9A CN103195772B (en) | 2013-04-17 | 2013-04-17 | Piezoelectricity causes the low frictional behavior cylinder of cylinder barrel flexural vibrations |
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| CN103195772A true CN103195772A (en) | 2013-07-10 |
| CN103195772B CN103195772B (en) | 2016-05-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454775A (en) * | 2014-11-04 | 2015-03-25 | 哈尔滨工业大学 | Two-end pretightened type low-frictional characteristic air cylinder with cylinder barrel bending vibration caused by piezoelectric stacks |
| CN107152456A (en) * | 2017-07-25 | 2017-09-12 | 顺德职业技术学院 | Porous ultrasonic bearing |
| CN109578372A (en) * | 2018-12-10 | 2019-04-05 | 江苏大学 | A kind of low rubbing cylinder of piezoelectric pile densification seal high-frequency vibration |
| CN109578368A (en) * | 2018-11-27 | 2019-04-05 | 江苏大学 | A kind of prefastening piezoelectric pile causes the low rubbing cylinder of piston rod sleeve high frequency torsional oscillation |
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| JPS62247767A (en) * | 1986-03-31 | 1987-10-28 | Aisin Seiki Co Ltd | Driving device |
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| CN101026343A (en) * | 2007-03-28 | 2007-08-29 | 哈尔滨工业大学 | Multi travelling wave bending-rotation ultrasonic motor stator and ultrasonic motor using same |
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2013
- 2013-04-17 CN CN201310132544.9A patent/CN103195772B/en not_active Expired - Fee Related
Patent Citations (5)
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| JPS62247767A (en) * | 1986-03-31 | 1987-10-28 | Aisin Seiki Co Ltd | Driving device |
| CN1738178A (en) * | 2005-08-26 | 2006-02-22 | 清华大学 | Polyhedron piezoelectric column or piezoelectric tube ultrasonic micromotor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454775A (en) * | 2014-11-04 | 2015-03-25 | 哈尔滨工业大学 | Two-end pretightened type low-frictional characteristic air cylinder with cylinder barrel bending vibration caused by piezoelectric stacks |
| CN104454775B (en) * | 2014-11-04 | 2016-06-08 | 哈尔滨工业大学 | Two ends prefastening piezoelectric pile causes the low frictional behavior cylinder of cylinder barrel bending vibration |
| CN107152456A (en) * | 2017-07-25 | 2017-09-12 | 顺德职业技术学院 | Porous ultrasonic bearing |
| CN107152456B (en) * | 2017-07-25 | 2023-04-18 | 顺德职业技术学院 | Porous ultrasonic bearing |
| CN109578368A (en) * | 2018-11-27 | 2019-04-05 | 江苏大学 | A kind of prefastening piezoelectric pile causes the low rubbing cylinder of piston rod sleeve high frequency torsional oscillation |
| CN109578368B (en) * | 2018-11-27 | 2020-03-31 | 江苏大学 | Pre-tightening type low-friction cylinder for high-frequency torsional vibration of piston rod sleeve caused by piezoelectric stack |
| CN109578372A (en) * | 2018-12-10 | 2019-04-05 | 江苏大学 | A kind of low rubbing cylinder of piezoelectric pile densification seal high-frequency vibration |
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| CN103195772B (en) | 2016-05-04 |
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Granted publication date: 20160504 Termination date: 20200417 |