CN103174701A - Cylinder with low-friction characteristic by piezoelectricity induced cylinder barrel torsional vibration - Google Patents
Cylinder with low-friction characteristic by piezoelectricity induced cylinder barrel torsional vibration Download PDFInfo
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- CN103174701A CN103174701A CN2013101325453A CN201310132545A CN103174701A CN 103174701 A CN103174701 A CN 103174701A CN 2013101325453 A CN2013101325453 A CN 2013101325453A CN 201310132545 A CN201310132545 A CN 201310132545A CN 103174701 A CN103174701 A CN 103174701A
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Abstract
The invention provides a cylinder with a low-friction characteristic by piezoelectricity induced cylinder barrel torsional vibration, belonging to the technical field of pneumatics and in particular belonging to the technical field of reducing friction coefficients of cylinders. The friction coefficient of the cylinder can be reduced conveniently, quickly and flexibly. The cylinder is characterized in that a plurality of planes are arranged on the outer circle surface of a cylinder barrel of a cylinder assembly along the peripheral direction, and two or more planes are formed on the same periphery; one or more piezoelectric telescopic pieces are arranged on each plane, and one plane of each piezoelectric telescopic piece is connected with the corresponding plane; all the piezoelectric telescopic pieces are arranged along the axis direction of the cylinder barrel of the cylinder assembly; the telescoping directions of all the piezoelectric telescopic pieces and the axis of the cylinder barrel of the cylinder assembly form included angles alpha; the adjacent piezoelectric telescopic pieces in a same line are arranged at intervals in an azimuth form of taking the included angles alpha as positive and negative angles; and the absolute values of the positive and negative angles are equal with each other and less than 90 degrees. When the piezoelectric telescopic pieces input driving signals, the coefficient of friction between the piston and the cylinder barrel can be reduced.
Description
Technical field
The invention belongs to the pneumatics field, specifically reduce the technical field of cylinder friction factor.
Background technique
Stick-slip Motion in Pneumatic Cylinder 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 to compensate the frictional force of cylinder by the mode of stack vibrating signal on control signal, eliminates the directivity of Pneumatic Cylinder with Friction, thereby has alleviated Stick-slip Motion in Pneumatic Cylinder.But the frequency of vibrating signal and amplitude are difficult to appropriate assurance when practical application, usually bring the 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, Stick-slip Motion in Pneumatic Cylinder is greatly improved.As patent CN102155465A.Yet this air supporting low rubbing cylinder has proposed very high request to the machining accuracy of each component of cylinder, and had great difficulty in the manufacturing of large-sized air supporting low rubbing 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 large improvement of having creeped of cylinder low speed.But this system often volume strengthens, and easily introduces oil contamination.
Summary of the invention
For easily and fast, realize to reduce neatly the friction factor of cylinder, the present invention proposes the low frictional behavior cylinder that a kind of piezoelectricity causes the cylinder barrel torsional vibration.
Described piezoelectricity causes the low frictional behavior cylinder of cylinder barrel torsional vibration, is comprised 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 around circumferencial direction, and the number on plane 〉=2 on same circumference, be provided with one or more pieces piezoelectricity stretchable sheets on each plane, and a plane of every piezoelectricity stretchable sheet all is connected with the plane, all piezoelectricity stretchable sheets are all arranged along the axial direction of the cylinder barrel of cylinder assembly, between the axis of the flexible direction of all piezoelectricity stretchable sheets and the cylinder barrel of cylinder assembly, angle a is arranged, and the adjacent piezoelectricity stretchable sheet in same lining up is take angle a as positive-angle, the orientation form of negative angle is spaced, and its positive-angle is equated with the absolute value of negative angle and spend less than 90, the frequency that described piezoelectricity stretchable sheet drives ac signal is identical or close with the natural torsion vibration frequency of cylinder barrel correspondence itself, all piezoelectricity stretchable sheets on same circumference can drive separately or in groups, and its driving phase place is all identical when driving in groups, and the driving phase place of the adjacent piezoelectricity stretchable sheet on each plane is identical.
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 be in Fig. 1 cylinder barrel A-A to the sectional structure schematic diagram.
Embodiment
Embodiment one:Describe referring to Fig. 1, Fig. 2, this embodiment is comprised 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 around circumferencial direction, and the number of plane 1-1 〉=2 on same circumference, be provided with one or more pieces piezoelectricity stretchable sheets 2 on each plane 1-1, and a plane of every piezoelectricity stretchable sheet 2 all is connected with plane 1-1, all piezoelectricity stretchable sheets 2 are all arranged along the axial direction of the cylinder barrel of cylinder assembly 1, between the axis of the flexible direction of all piezoelectricity stretchable sheets 2 and the cylinder barrel of cylinder assembly 1, angle a is arranged, and the adjacent piezoelectricity stretchable sheet 2 in same lining up is take angle a as positive-angle, the orientation form of negative angle is spaced, and its positive-angle is equated with the absolute value of negative angle and spend less than 90, the frequency that described piezoelectricity stretchable sheet 2 drives ac signal is identical or close with the natural torsion vibration frequency of cylinder barrel correspondence itself, all piezoelectricity stretchable sheets 2 on same circumference can drive separately or in groups, and its driving phase place is all identical when driving in groups, and the driving phase place of the adjacent piezoelectricity stretchable sheet 2 on each plane 1-1 is identical.
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.
The replaceable one-tenth magnetostriction of described piezoelectricity stretchable sheet 2 sheet, 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.
Working principle: it is by driving piezoelectricity stretchable sheet 2, make the cylinder barrel of cylinder assembly 1 be in high frequency torsional vibration state, utilizes the antifriction effect that the dither of cylinder barrel produces to reduce the friction factor of piston and cylinder barrel, thereby makes cylinder have low frictional behavior.
Pass to natural torsion vibration the frequency identical or close sinusoidal ac corresponding with cylinder barrel itself for all piezoelectricity stretchable sheets 2, two piezoelectricity stretchable sheets on every one side can produce the distortion along they length directions simultaneously, an end is arranged near cylinder barrel end restraint limit due to them, so the end of cylinder barrel is for the node of vibration, so the distortion meeting of length direction is along the another one direction.Two piezoelectricity stretchable sheets are arranged symmetrically with, distortion along the cylinder barrel axial direction is cancelled out each other, the distortion that is coupled out is Vertical direction vertically, thereby the deformation force that the piezo-electric sheet of every one side is coupled out is along circumferentially being equivalent to moment of metal cylinder barrel, thereby motivate corresponding cylinder barrel torsion modes, and then reduce the cylinder friction factor.
Claims (3)
1. piezoelectricity causes the low frictional behavior cylinder of cylinder barrel torsional vibration, it is characterized in that it is comprised 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 (1-1) around circumferencial direction, and the number of plane on same circumference (1-1) 〉=2, be provided with one or more pieces piezoelectricity stretchable sheets (2) on each plane (1-1), and a plane of every piezoelectricity stretchable sheet (2) all is connected with plane (1-1), all piezoelectricity stretchable sheets (2) are all arranged along the axial direction of the cylinder barrel of cylinder assembly (1), between the axis of the cylinder barrel of the flexible direction of all piezoelectricity stretchable sheets (2) and cylinder assembly (1), angle a is arranged, and the adjacent piezoelectricity stretchable sheet (2) in same lining up is take angle a as positive-angle, the orientation form of negative angle is spaced, and its positive-angle is equated with the absolute value of negative angle and spend less than 90, the frequency that described piezoelectricity stretchable sheet (2) drives ac signal is identical or close with the natural torsion vibration frequency of cylinder barrel correspondence itself, all piezoelectricity stretchable sheets (2) on same circumference can drive separately or in groups, and its driving phase place is all identical when driving in groups, and the driving phase place of the adjacent piezoelectricity stretchable sheet (2) on each plane (1-1) is identical.
2. piezoelectricity according to claim 1 causes the low frictional behavior cylinder of cylinder barrel torsional vibration, 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.
3. piezoelectricity according to claim 1 causes the low frictional behavior cylinder of cylinder barrel torsional vibration, 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 |
|---|---|---|---|
| CN201310132545.3A CN103174701B (en) | 2013-04-17 | 2013-04-17 | Piezoelectricity causes the low frictional behavior cylinder of cylinder barrel twisting vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310132545.3A CN103174701B (en) | 2013-04-17 | 2013-04-17 | Piezoelectricity causes the low frictional behavior cylinder of cylinder barrel twisting vibration |
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| Publication Number | Publication Date |
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| CN103174701A true CN103174701A (en) | 2013-06-26 |
| CN103174701B CN103174701B (en) | 2016-08-17 |
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| CN201310132545.3A Expired - Fee Related CN103174701B (en) | 2013-04-17 | 2013-04-17 | Piezoelectricity causes the low frictional behavior cylinder of cylinder barrel twisting vibration |
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Cited By (2)
| 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 |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1157916A (en) * | 1995-09-20 | 1997-08-27 | 株式会社尼康 | Vibration actuator |
| US6849989B2 (en) * | 2002-10-31 | 2005-02-01 | Andreas Schmid | Translation and rotation positioning motor |
| CN101777853A (en) * | 2010-01-12 | 2010-07-14 | 南京航空航天大学 | d31-effect based unidirectional chip longitudinal-torsional compound ultrasonic motor |
| CN102185519A (en) * | 2011-05-11 | 2011-09-14 | 南京航空航天大学 | Mode conversion type piezoelectric thread transmission linear ultrasonic motor |
-
2013
- 2013-04-17 CN CN201310132545.3A patent/CN103174701B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1157916A (en) * | 1995-09-20 | 1997-08-27 | 株式会社尼康 | Vibration actuator |
| US6849989B2 (en) * | 2002-10-31 | 2005-02-01 | Andreas Schmid | Translation and rotation positioning motor |
| CN101777853A (en) * | 2010-01-12 | 2010-07-14 | 南京航空航天大学 | d31-effect based unidirectional chip longitudinal-torsional compound ultrasonic motor |
| CN102185519A (en) * | 2011-05-11 | 2011-09-14 | 南京航空航天大学 | Mode conversion type piezoelectric thread transmission linear ultrasonic motor |
Non-Patent Citations (1)
| Title |
|---|
| 高焓: "基于超声减摩原理的气缸摩擦特性研究", 《中国优秀硕士学位论文全文数据库》 * |
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 |
| 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 |
| 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 |
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| CN103174701B (en) | 2016-08-17 |
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Granted publication date: 20160817 Termination date: 20200417 |