CN104454774A - Low-frictional-characteristic cylinder for making piston rod seal ring vibrate in radial direction through piezoelectric stack - Google Patents
Low-frictional-characteristic cylinder for making piston rod seal ring vibrate in radial direction through piezoelectric stack Download PDFInfo
- Publication number
- CN104454774A CN104454774A CN201410611275.9A CN201410611275A CN104454774A CN 104454774 A CN104454774 A CN 104454774A CN 201410611275 A CN201410611275 A CN 201410611275A CN 104454774 A CN104454774 A CN 104454774A
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- cylinder
- piezoelectric pile
- cylinder barrel
- annulus
- thin
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
Abstract
The invention provides a low-frictional-characteristic cylinder for making a piston rod seal ring vibrate in the radial direction through a piezoelectric stack, and relates to the technical field of pneumatic control. The low-frictional-characteristic cylinder aims at solving the problems that an existing friction reduction structure is high in noise, short in service life, high in manufacturing difficulty, large in size, capable of causing oil liquid pollution, small in output and low in reliability. A thin-walled pipe diameter part is arranged in the middle of the left side of a cylinder body of the low-frictional-characteristic cylinder. A flange-shaped circular ring is arranged at the left end of the thin-walled pipe diameter part. An O-shaped seal ring is embedded in the position, located on the inner circumferential face of the flange-shaped circular ring, of the left end of the thin-walled pipe diameter part in a sealed mode. The inner circumferential face of the left side of a high-rigidity sleeve is circumferentially and evenly provided with n planes, wherein n is an even number. A right end piston of a piston rod assembly is arranged in a cavity inside the cylinder body in a sliding and sealed mode. A piston rod on the left side of the piton rod assembly penetrates through the O-shaped seal ring in a sliding mode and then extends to the outer end of the left side of the cylinder body. The thin-walled pipe diameter part on the left side of the cylinder body and the flange-shaped circular ring are sleeved with the high-rigidity sleeve in a spaced mode. The friction force between the piston rods and the cylinder body can be reduced by 70% or higher in the ultrasonic vibration resonance state, and the friction reduction effect is good.
Description
Technical field
What the present invention relates to is the technical field of pneumatic control.
Background technique
The piston of cylinder is when tick-over, and the discontinuous fluid phenomenon often stopped and gone, namely cylinder is creeped.Stick-slip Motion in Pneumatic Cylinder has a strong impact on air-driven precision.For eliminating this phenomenon, common method is in control signal, superpose flutter (Dither) signal to compensate the frictional force of cylinder.But the introducing of vibrating signal greatly reduces the life-span of control valve, and bring unnecessary noise and shake, therefore apply limited.
Another kind method utilizes air supporting principle to introduce one deck air film between cylinder friction pair, thus obviously reduce the kinematics and static friction power of cylinder, and Stick-slip Motion in Pneumatic Cylinder is greatly improved.As patent CN102155465A.But this air supporting low rubbing cylinder in the fabrication process, proposes very high request to the machining accuracy of each parts, and there is great difficulty in large-sized floating cylinder manufacturing.
A kind of method is also had to be that gas-liquid combination-controlled servo-system is used often in the occasion higher to low speed performance requirements.By increasing the damping of system, the very large improvement of having creeped of cylinder low speed.But this system often volume is comparatively large, and easily introduces oil contamination.
Also have a kind of method to be that the principle utilizing ultrasonic vibration to reduce friction pastes piezo-electric sheet on cylinder, the ultrasonic vibration utilizing it to export reduces friction.As patent CN103195770A, CN103195772A.But this SMD cylinder exists piezo-electric sheet exerts oneself less, with the dissatisfactory problem of cylinder barrel Placement reliability.
Summary of the invention
The object of this invention is to provide the low frictional behavior cylinder of a kind of piezoelectric pile activation rod seal circle radial vibration, in order to overcome existing friction-reducing structure, the present invention exists that noise is large, the life-span is short, manufacture difficulty is large, volume is large, oil contamination, little, that reliability is low problem of exerting oneself.The low frictional behavior cylinder of a kind of piezoelectric pile activation rod seal circle of the present invention radial vibration, it is made up of cylinder barrel, high rigid sleeve, piston-rod assembly, multiple piezoelectric pile, O RunddichtringO.
Cylinder barrel right-hand member closed set has plug, and cylinder barrel right-hand member has the breather port be communicated with cylinder barrel internal cavities, and cylinder barrel left side central portion has the breather port be communicated with cylinder barrel internal cavities; The left side central portion of cylinder barrel is thin-walled caliber, and the left end of thin-walled caliber is flange plate-like annulus, and on the periphery of annulus, even circumferential is provided with n plane, and annulus inner headed face place closed set has O RunddichtringO; On the left side inner headed face of high rigid sleeve, even circumferential is provided with n plane, and n is even number; The right-hand member piston slipper seal of piston-rod assembly is arranged in cylinder barrel internal cavities, piston rod on the left of piston-rod assembly reaches outer end on the left of cylinder barrel after sliding through O RunddichtringO, high rigid sleeve gap is enclosed within thin-walled caliber on the left of cylinder barrel and flange plate-like annulus is outside, and the right side of high rigid sleeve is connected with step end face on the left of cylinder barrel, n plane on annulus periphery is parallel relative respectively with n plane on inner headed face on the left of high rigid sleeve, and between apical grafting have a piezoelectric pile; The driving rule of multiple piezoelectric pile is often pair of piezoelectric pile homophase output about cylinder-bore axis symmetry, makes annulus and thin-walled caliber produce cylinder and radially bends vibration.
The present invention can reduce more than 70 percent of frictional force between piston rod and cylinder body under ultrasonic vibration resonant condition, and friction reducing effect is good.The present invention is by the control acting on the radial vibration of rod seal circle, makes cylinder piston rod seal place generation cylinder radially bend the low rubbing cylinder designed based on ultrasonic antifriction principle of mode of vibration.Its compact structure, can realize high frequency cylinder and radially bend vibration, has features such as exerting oneself comparatively greatly, efficiency is high, applicability is strong, has a wide range of applications in low speed cylinder field.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention,
Fig. 2 is the structural representation of cylinder barrel 1 and O RunddichtringO 5 in Fig. 1,
Fig. 3 is the left TV structure schematic diagram of high rigid sleeve 2 in Fig. 1,
Fig. 4 is that structure for amplifying schematic diagram is looked on a left side for cylinder barrel 1 in Fig. 2.
Embodiment
Embodiment one: composition graphs 1, Fig. 2, Fig. 3 illustrate present embodiment, present embodiment is made up of cylinder barrel 1, high rigid sleeve 2, piston-rod assembly 3, multiple piezoelectric pile 4, O RunddichtringO 5;
Cylinder barrel 1 right-hand member closed set has plug 1-5, and cylinder barrel 1 right-hand member has the breather port 1-7 be communicated with cylinder barrel 1 internal cavities 1-8, and cylinder barrel 1 left side central portion has the breather port 1-6 be communicated with cylinder barrel 1 internal cavities 1-8; The left side central portion of cylinder barrel 1 is thin-walled caliber 1-1, and the left end of thin-walled caliber 1-1 is flange plate-like annulus 1-2, and on the periphery of annulus 1-2, even circumferential is provided with n plane 1-3, and annulus 1-2 inner headed face place closed set has O RunddichtringO 5; On the left side inner headed face of high rigid sleeve 2, even circumferential is provided with n plane 2-1, n is even number; The right-hand member piston slipper seal of piston-rod assembly 3 is arranged in cylinder barrel 1 internal cavities 1-8, piston rod on the left of piston-rod assembly 3 reaches outer end on the left of cylinder barrel 1 after sliding through O RunddichtringO 5, it is outside that high rigid sleeve 2 gap is enclosed within thin-walled caliber 1-1 on the left of cylinder barrel 1 and flange plate-like annulus 1-2, and the right side of high rigid sleeve 2 is connected with step end face 1-4 on the left of cylinder barrel 1, n plane 1-3 on annulus 1-2 periphery is parallel relative respectively with n plane 2-1 on inner headed face on the left of high rigid sleeve 2, and between apical grafting have a piezoelectric pile 4; The driving rule of multiple piezoelectric pile 4 is export about often pair of piezoelectric pile 4 homophase of cylinder-bore axis symmetry, makes annulus 1-2 and thin-walled caliber 1-1 produce cylinder and radially bends vibration.
Described each piezoelectric pile 4 is THORLABS Products (PA3BCW 1.5 × 1.5 × 1 mm).
The drive waveforms of described each piezoelectric pile 4 is sinusoidal or pyramidal wave.
The driver frequency of described each piezoelectric pile 4 is supersonic band, the specifically resonant frequency of whole device, is 150 kHz ~ 170 kHz.
Working principle: all piezoelectric pile 4 operationally, the radial dither of O RunddichtringO 5 is promoted by annulus 1-2, O RunddichtringO 5 is made to be in dither state with corresponding friction pair, utilize the antifriction effect of dither, reduce the difference of the kinematics and static friction coefficient between friction pair, and then the switching of kinematics and static friction power when weakening its low cruise, with reach improve cylinder low cruise time the characteristic such as frictional force object, thus reduce the creeping phenomenon of cylinder.
Embodiment two: composition graphs 1, Fig. 2, Fig. 3 illustrate present embodiment, the difference of present embodiment and embodiment one is that the wall thickness of the thin-walled caliber 1-1 of the left side central portion of cylinder barrel 1 is for being less than or equal to 0.5 mm.Other composition is identical with embodiment one with Placement.
Embodiment three: composition graphs 1, Fig. 2, Fig. 3 illustrate present embodiment, the difference of present embodiment and embodiment one is that the quantity of the plane 1-3 on the periphery of annulus 1-2 is four, and the quantity of the plane 2-1 on the left side inner headed face of high rigid sleeve 2 is four.Other composition is identical with embodiment one with Placement.
Embodiment four: composition graphs 4 illustrates present embodiment, groove 1-9 is had between every two plane 1-3 of present embodiment on the basis of embodiment one on the periphery of annulus 1-2, the opening direction of groove 1-9 is the radial direction of annulus 1-2, and to inner opening; The width of groove 1-9 is less than 200 microns.Other composition is identical with embodiment one with Placement.
Present embodiment is rigidity when reducing vibration, increases Oscillation Amplitude, thus reduces Pneumatic Cylinder with Friction further, increases the effective ouput force of cylinder.
Claims (7)
1. the low frictional behavior cylinder of piezoelectric pile activation rod seal circle radial vibration, it is made up of cylinder barrel (1), high rigid sleeve (2), piston-rod assembly (3), multiple piezoelectric pile (4), O RunddichtringO (5);
Cylinder barrel (1) right-hand member closed set has plug (1-5), cylinder barrel (1) right-hand member has the breather port (1-7) be communicated with cylinder barrel (1) internal cavities (1-8), and cylinder barrel (1) left side central portion has the breather port (1-6) be communicated with cylinder barrel (1) internal cavities (1-8), it is characterized in that the left side central portion of cylinder barrel (1) is thin-walled caliber (1-1), the left end of thin-walled caliber (1-1) is flange plate-like annulus (1-2), on the periphery of annulus (1-2), even circumferential is provided with n plane (1-3), annulus (1-2) inner headed face place closed set has O RunddichtringO (5), on the left side inner headed face of high rigid sleeve (2), even circumferential is provided with n plane (2-1), and n is even number, the right-hand member piston slipper seal of piston-rod assembly (3) is arranged in cylinder barrel (1) internal cavities (1-8), outer end, cylinder barrel (1) left side is reached after piston rod on the left of piston-rod assembly (3) slides through O RunddichtringO (5), high rigid sleeve (2) gap is enclosed within thin-walled caliber (1-1) and flange plate-like annulus (1-2) outside in cylinder barrel (1) left side, and the right side of high rigid sleeve (2) is connected with cylinder barrel (1) left side step end face (1-4), n plane (1-3) on annulus (1-2) periphery is parallel relative respectively with n plane (2-1) on the inner headed face of high rigid sleeve (2) left side, and between apical grafting have a piezoelectric pile (4), the driving rule of multiple piezoelectric pile (4) is export about often pair of piezoelectric pile (4) homophase of cylinder-bore axis symmetry, makes annulus (1-2) and thin-walled caliber (1-1) produce cylinder and radially bends vibration.
2. the low frictional behavior cylinder of piezoelectric pile activation rod seal circle according to claim 1 radial vibration, is characterized in that described each piezoelectric pile (4) is for THORLABS Products-PA3BCW 1.5 × 1.5 × 1 mm.
3. the low frictional behavior cylinder of piezoelectric pile activation rod seal circle according to claim 1 radial vibration, is characterized in that the drive waveforms of described each piezoelectric pile (4) is for sinusoidal or pyramidal wave.
4. the low frictional behavior cylinder of piezoelectric pile activation rod seal circle according to claim 1 radial vibration, the driver frequency that it is characterized in that described each piezoelectric pile (4) is supersonic band, the specifically resonant frequency of whole device is 150 kHz ~ 170 kHz.
5. the low frictional behavior cylinder of piezoelectric pile activation rod seal circle according to claim 1 radial vibration, is characterized in that the wall thickness of the thin-walled caliber (1-1) of the left side central portion of cylinder barrel (1) is for being less than or equal to 0.5mm.
6. the low frictional behavior cylinder of piezoelectric pile activation rod seal circle according to claim 1 radial vibration, the quantity that it is characterized in that the plane (1-3) on the periphery of annulus (1-2) is four, and the quantity of the plane (2-1) on the left side inner headed face of high rigid sleeve (2) is four.
7. the low frictional behavior cylinder of piezoelectric pile activation rod seal circle according to claim 1 radial vibration, it is characterized in that having groove (1-9) between every two planes (1-3) on the periphery of annulus (1-2), the opening direction of groove (1-9) is the radial direction of annulus (1-2), and to inner opening; The width of groove (1-9) is less than 200 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410611275.9A CN104454774B (en) | 2014-11-04 | 2014-11-04 | The low frictional behavior cylinder of piezoelectric pile activation rod seal circle radial vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410611275.9A CN104454774B (en) | 2014-11-04 | 2014-11-04 | The low frictional behavior cylinder of piezoelectric pile activation rod seal circle radial vibration |
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| CN104454774A true CN104454774A (en) | 2015-03-25 |
| CN104454774B CN104454774B (en) | 2016-06-08 |
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| CN201410611275.9A Expired - Fee Related CN104454774B (en) | 2014-11-04 | 2014-11-04 | The low frictional behavior cylinder of piezoelectric pile activation rod seal circle radial vibration |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356902A (en) * | 2018-11-29 | 2019-02-19 | 南京工程学院 | A kind of piston rod assembly for servoBcylinder |
| CN109538570A (en) * | 2018-12-10 | 2019-03-29 | 江苏大学 | A kind of low rubbing cylinder of prefastening piezoelectric pile densification seal vibration |
| 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 |
| CN109578367A (en) * | 2018-11-27 | 2019-04-05 | 江苏大学 | A kind of prefastening piezoelectric pile causes the low rubbing cylinder of sleeve multiple modal vibrations |
| 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 |
| CN111022424A (en) * | 2019-12-26 | 2020-04-17 | 长春工业大学 | Ultrasonic antifriction type single-action positioning cylinder adopting motion decoupling mechanism |
| CN111022425A (en) * | 2019-12-26 | 2020-04-17 | 长春工业大学 | Decoupling type double-acting locking cylinder with ultrasonic nut |
| CN111059097A (en) * | 2019-12-26 | 2020-04-24 | 长春工业大学 | Annular magnetic coupling type linear locking cylinder based on ultrasonic antifriction effect |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04265671A (en) * | 1991-02-16 | 1992-09-21 | Murakami Kaimeidou:Kk | Ultrasonic linear sliding mechanism |
| US5574326A (en) * | 1993-05-07 | 1996-11-12 | Canon Kabushiki Kaisha | Vibration actuator |
| JPH09317713A (en) * | 1996-05-24 | 1997-12-09 | Mitsubishi Heavy Ind Ltd | Hydraulic cylinder device |
| CN101262186A (en) * | 2008-04-29 | 2008-09-10 | 哈尔滨工业大学 | Vertical bending layer energy converter cylinder stator and ultrasonic electromotor using this stator |
| CN101304223A (en) * | 2008-07-07 | 2008-11-12 | 哈尔滨工业大学 | Longitudinal-shaking sandwich energy converter type cylinder type birotor ultrasonic motor |
| CN103174702A (en) * | 2013-04-17 | 2013-06-26 | 哈尔滨工业大学 | Cylinder with low friction characteristic by piezoelectricity induced piston vibration |
-
2014
- 2014-11-04 CN CN201410611275.9A patent/CN104454774B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04265671A (en) * | 1991-02-16 | 1992-09-21 | Murakami Kaimeidou:Kk | Ultrasonic linear sliding mechanism |
| US5574326A (en) * | 1993-05-07 | 1996-11-12 | Canon Kabushiki Kaisha | Vibration actuator |
| JPH09317713A (en) * | 1996-05-24 | 1997-12-09 | Mitsubishi Heavy Ind Ltd | Hydraulic cylinder device |
| CN101262186A (en) * | 2008-04-29 | 2008-09-10 | 哈尔滨工业大学 | Vertical bending layer energy converter cylinder stator and ultrasonic electromotor using this stator |
| CN101304223A (en) * | 2008-07-07 | 2008-11-12 | 哈尔滨工业大学 | Longitudinal-shaking sandwich energy converter type cylinder type birotor ultrasonic motor |
| CN103174702A (en) * | 2013-04-17 | 2013-06-26 | 哈尔滨工业大学 | Cylinder with low friction characteristic by piezoelectricity induced piston vibration |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578367A (en) * | 2018-11-27 | 2019-04-05 | 江苏大学 | A kind of prefastening piezoelectric pile causes the low rubbing cylinder of sleeve multiple modal vibrations |
| 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 |
| CN109578367B (en) * | 2018-11-27 | 2020-05-01 | 江苏大学 | Low-friction cylinder with pre-tightening piezoelectric stack-induced multi-mode sleeve vibration |
| CN109356902A (en) * | 2018-11-29 | 2019-02-19 | 南京工程学院 | A kind of piston rod assembly for servoBcylinder |
| CN109538570A (en) * | 2018-12-10 | 2019-03-29 | 江苏大学 | A kind of low rubbing cylinder of prefastening piezoelectric pile densification seal vibration |
| 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 |
| CN111022424A (en) * | 2019-12-26 | 2020-04-17 | 长春工业大学 | Ultrasonic antifriction type single-action positioning cylinder adopting motion decoupling mechanism |
| CN111022425A (en) * | 2019-12-26 | 2020-04-17 | 长春工业大学 | Decoupling type double-acting locking cylinder with ultrasonic nut |
| CN111059097A (en) * | 2019-12-26 | 2020-04-24 | 长春工业大学 | Annular magnetic coupling type linear locking cylinder based on ultrasonic antifriction effect |
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| CN104454774B (en) | 2016-06-08 |
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