CN201250820Y - Piezoelectric hydraulic linear motor - Google Patents
Piezoelectric hydraulic linear motor Download PDFInfo
- Publication number
- CN201250820Y CN201250820Y CNU2008200724200U CN200820072420U CN201250820Y CN 201250820 Y CN201250820 Y CN 201250820Y CN U2008200724200 U CNU2008200724200 U CN U2008200724200U CN 200820072420 U CN200820072420 U CN 200820072420U CN 201250820 Y CN201250820 Y CN 201250820Y
- Authority
- CN
- China
- Prior art keywords
- piezoelectric
- pump
- linear motor
- hydraulic
- hydraulic cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a piezoelectric hydraulic linear motor, belonging to mechanical electrical and hydraulic integration technical field, wherein the inlet of a piezoelectric pump is connected with an energy accumulator via a pipe, the energy accumulator is connected with a reversing valve via a pipe, the reversing valve is connected with the outlet of the piezoelectric pump via a pipe and the reversing valve is connected with the chamber of a hydraulic cylinder. The utility model has the advantages that piezoelectric hydraulic linear motor has novel structure, utilizes liquid medium to transfer power, and can effectively convert micro-amplitude reciprocal vibration of piezoelectric ceramic into macro linear motion of the piston of the hydraulic cylinder, to obtain high drive force and large motion stroke, and can realize accurate drive and control by accumulating one liquid drop in one time. The piezoelectric hydraulic motor has simple structure and control, small volume and good seal performance and can be used as labeling parts.
Description
Technical field
The utility model belongs to the mechanical-electrical-hydraulic integration field, be specifically related to a kind of piezoelectric pump that utilizes and drive liquid circulation, convert piezoelectric constant high frequency, small double vibrations to the straight-line piezoelectric hydraulic driver of the regular macroscopic view of hydraulic cylinder piston, i.e. piezoelectric hydraulic linear motor.
Background technique
Piezoelectric constant has simple in structure, and response is fast, no electromagnetic interference, energy consumption are low, be easy to characteristics such as control, all is widely used in fields such as Aero-Space, machinery, optical engineering, biological medicine and fluid drives and controls.At present, be that power unit realizable force and straight-line displacement output/control piezoelectric actuator have various ways with the piezoelectric constant, can simply be summed up as 3 classes: the piezoelectric actuator that 1) directly utilizes piezoelectrics dilatation ouput force or displacement; 2) piezoelectric actuator of enlargers such as employing lever and flexible hinge; 3) the step-by-step movement piezo-electric motor that adopts clamped mechanism or ultrasound principle to form.Preceding two class piezoelectric actuators simple in structure, ouput force is big, but displacement is small, practical application has been subjected to certain restriction; The latter can obtain bigger movement travel, but the machining accuracy height that structure and control is complicated, require parts, transmit power and displacement owing to rely on frictional force, therefore the pressure that feeding rigidity is low, output drive strength produces far below the piezoelectrics distortion, have only a few to tens of newton, can't satisfy all bigger use occasion of power and displacement.Volume is little, and is in light weight, high ouput force, big displacement, and speed is fast, and the next-generation drive that efficiency is high is that a lot of field is badly in need of.For example, the applications such as ACTIVE CONTROL on material testing machine, rocket motor thrust measurement test stand, helicopter rotors small sway and conventional lighter-than-air vehicles surface, usually require driver to have the requirement that structure control is satisfied in bigger ouput force and displacement, the controlling object of this kind equipment mainly is a load, come load or unload (carrying out the two-way adjustment of thousands of Newton force in several millimeters/centimetres stroke range) by real-time accurate displacement on a large scale, this is that existing at present piezoelectric actuator is implacable.
Summary of the invention
The utility model provides a kind of piezoelectric hydraulic linear motor, to solve the ouput force that piezoelectric actuator exists and displacement is small, can not satisfy the problem of actual demand.The technological scheme that the utility model is taked is: the inlet of piezoelectric pump is connected by pipeline with accumulator, this accumulator also is connected with selector valve by pipeline, this selector valve is connected by pipeline with the piezoelectricity delivery side of pump, and this selector valve also is connected with the cavity of oil hydraulic cylinder by pipeline.
A kind of mode of execution of the utility model is: this selector valve adopts 34 logical valves.
A kind of mode of execution of the utility model is: piezoelectric pump adopts piezoelectric stack pump, and described piezoelectric stack pump is made of the pump housing, 1～10 piezoelectric stack oscillator, rigidity jacking block, elastic diaphragm and stop valve, and the described pump housing and elastic diaphragm constitute pump chamber jointly.
A kind of mode of execution of the utility model is: piezoelectric pump adopts the piezoelectric chip pump, and described piezoelectric chip pump is made of the pump housing, 1～10 piezoelectric chip oscillator and stop valve, and the described pump housing and piezoelectric chip oscillator constitute pump chamber jointly.
Piezoelectric pump is a dynamical element in the utility model, realizes the circulation and the driving of fluid; The function of selector valve is the moving direction of flowing of control fluid and hydraulic cylinder piston; The effect of accumulator is to receive high-pressure liquid, additional low-pressure fluid, and the storage side face of piston ring is long-pending not to wait the liquid capacity that causes poor; The function of oil hydraulic cylinder is the output of realizable force or displacement.Characteristics of the present utility model are to obtain bigger ouput force and movement travel simultaneously.
The utility model utilizes piezoelectric pump to drive liquid circulation, realizes movement conversion and transmission of power by flowing medium, so with the high frequency of piezoelectric vibrator a little double vibrations convert the straight line motion of hydraulic cylinder piston to.
In a mode of execution of the present utility model, comprise parts such as at least one piezoelectric pump, selector valve, accumulator, oil hydraulic cylinder and connecting pipeline.When the piezoelectric vibrator in the described piezoelectric pump deforms under the alternating voltage effect, piezoelectric pump pump chamber and hydrodynamic pressure change, and then promote the open and close of one-way valve: when the deformation of described piezoelectric vibrator make that the piezoelectric pump pump chamber reduces, when hydrodynamic pressure increases, the inlet valve of piezoelectric pump cuts out, outlet valve is opened, and pump chamber inner high voltage fluid enters certain cavity of oil hydraulic cylinder through selector valve; Simultaneously, the liquid in another cavity of oil hydraulic cylinder enters accumulator, and hydraulic cylinder piston fortune moves a step; After the alternating voltage commutation, the piezoelectric pump pump chamber increases, the interior fluid pressure of pump chamber reduces, and causes inlet valve unlatching, the outlet valve of piezoelectric pump to be closed, and liquid enters pump chamber in the accumulator, so far finishes a work cycle.When piezoelectric vibrator running hours under the alternating voltage effect, the pulsating fluid of piezoelectric pump output promotes hydraulic cylinder piston and carries out straight line motion.By selector valve control, can realize the advancing of hydraulic cylinder piston, retreat, swing or self-locking.
In another mode of execution of the present utility model, described piezoelectric pump comprises that at least one piezoelectric stack oscillator, pump chamber film are thin, rigidity jacking block and a pair of stop valve.When described piezoelectric stack oscillator under the alternating voltage effect dilatation takes place, change pump chamber and hydrodynamic pressure, and then promote the open and close of one-way valve, realize unidirectional, the continuous-flow of fluid by rigidity jacking block and pump chamber barrier film.
In another embodiment of the present utility model, described piezoelectric pump comprises at least one piezoelectric chip oscillator and a pair of stop valve.When described piezoelectric chip oscillator occurs bending and deformation under the alternating voltage effect, cause pump chamber and hydrodynamic pressure to change, and then promote the open and close of one-way valve, realize the continuous output of fluid.
The utility model proposes the piezoelectric hydraulic linear motor that Piezoelectric Ceramic is combined with hydraulic transmission technology, promptly utilize the method for piezoelectric pump circulating liquid to convert piezoelectrics micro-strain and dither to hydraulic cylinder piston straight line motion clocklike.This motor has that piezoelectric element response is fast, no electromagnetic interference, be easy to control, simple in structure, characteristics such as volume is little; Also have simultaneously characteristics such as hydraulicdriven high-energy-density, big movement travel, high output pressure, no impact.Compare with traditional hydraulic unit driver, it is simple in structure, and volume is little, can use separately or as the standarized component of complex system, is applicable to robot, microsystem and tele-control system; Compare with present existing piezoelectric linear motor, its advantage is the two-way control that can obtain bigger ouput force and movement travel, realizable force and displacement simultaneously.
Advantage of the present utility model is: novel structure, utilize the flowing medium transferring power, can effectively the double vibrations a little of piezoelectric constant be converted to macroscopical straight line motion of hydraulic cylinder piston, obtain bigger driving force and movement travel, and can realize accurate the driving and control by the method for once accumulating a drop; Simultaneously, the structure of piezoelectric hydraulic motor and control are simple, and volume is little, and good airproof performance can be used as the mark parts and uses.
Description of drawings
Fig. 1 is the structural representation of the utility model piezoelectric hydraulic linear motor;
Fig. 2 is the structural representation of the utility model piezoelectric stack pump;
Fig. 3 is the utility model piezoelectric chip pump structure schematic representation;
Embodiment
The inlet of piezoelectric pump is connected by pipeline with accumulator, and this accumulator also is connected with selector valve by pipeline, and this selector valve is connected by pipeline with the piezoelectricity delivery side of pump, and this selector valve also is connected with the cavity of oil hydraulic cylinder by pipeline; This selector valve adopts 34 logical valves.
As shown in Figure 1, piezoelectric pump 1, selector valve 2, oil hydraulic cylinder 3 and accumulator 4 connect into the system of sealing by pipeline; Described accumulator links to each other with the inlet of piezoelectric pump, and described selector valve is 34 logical valves; Under the situation that described piezoelectric pump 1 starts, the motion state of the position change hydraulic cylinder piston 301 by adjusting described selector valve 3: selector valve 2 by the time, be in 202 positions, the fluid of piezoelectric pump 1 output directly returns pump chamber through selector valve 2, oil hydraulic cylinder cavity 302 and 303 does not all have fluid and enters and flow out, and hydraulic cylinder piston rod 301 is in the lock state; When the lower end of selector valve 2 was connected, in 201 positions, the piezoelectricity delivery side of pump was communicated with oil hydraulic cylinder cavity 303, the import of piezoelectric pump is communicated with the cavity 302 of oil hydraulic cylinder, and hydraulic cylinder piston rod 301 moves downward; On the contrary, when the upper end of selector valve 2 is connected, locate 203 positions, the inlet/outlet of piezoelectric pump is communicated with 303 and 302 cavitys of oil hydraulic cylinder respectively, and hydraulic cylinder piston 301 moves upward.
As shown in Figure 2, piezoelectric pump can be driven by the piezoelectric stack oscillator, be piezoelectric stack pump, described piezoelectric stack pump by the pump housing 101, piezoelectric stack 102, rigidity jacking block 103, elastic diaphragm 104, and stop valve 106 and 107 constitute.The described pump housing 101 and elastic diaphragm 104 common formation pump chambers 105.When described piezoelectric stack oscillator extends under extraneous alternating voltage effect, promote the pump chamber barrier film and make that pump chamber 105 volumes reduce, its fluid pressure increases, outlet valve 106 is opened, inlet valve 107 cuts out, and fluid flows out from outlet; On the contrary, after the alternating voltage commutation, piezoelectric stack oscillator 101 shortens, pump chamber 105 volumes increase, and causes hydrodynamic pressure to reduce, and outlet valve 106 cuts out, inlet valve 107 is opened, and fluid enters pump chamber.
As shown in Figure 3, piezoelectric pump can be driven by the piezoelectric chip oscillator, is the piezoelectric chip pump, and described piezoelectric chip pump is made of the pump housing 108, piezoelectric chip oscillator 109 and stop valve 111 and 112.The described pump housing 108 and piezoelectric chip oscillator 109 common formation pump chambers 110.When described piezoelectric chip oscillator when bending deflection reduces pump chamber 110 volumes in pump chamber under the extraneous alternating voltage effect, described pump chamber 110 fluid pressures increase, outlet valve 111 is opened, inlet valve 112 cuts out, fluid flows out from outlet; On the contrary, behind the voltage commutation, when the piezoelectric chip oscillator increased pump chamber 105 volumes to the pump chamber outside sweep, the pump chamber fluid pressure reduced, and outlet valve 111 cuts out, inlet valve 112 is opened, and fluid enters pump chamber.
Claims (6)
1, a kind of piezoelectric hydraulic linear motor, it is characterized in that: the inlet of piezoelectric pump is connected by pipeline with accumulator, this accumulator also is connected with selector valve by pipeline, and this selector valve is connected by pipeline with the piezoelectricity delivery side of pump, and this selector valve also is connected with the cavity of oil hydraulic cylinder.
2, piezoelectric hydraulic linear motor according to claim 1 is characterized in that: this selector valve adopts 34 logical valves.
3, piezoelectric hydraulic linear motor according to claim 1 and 2 is characterized in that: piezoelectric pump adopts piezoelectric stack pump.
4, piezoelectric hydraulic linear motor according to claim 1 and 2 is characterized in that: piezoelectric pump adopts the piezoelectric chip pump.
5, piezoelectric hydraulic linear motor according to claim 3 is characterized in that: piezoelectric pump adopts 1～10 piezoelectric stack oscillator.
6, piezoelectric hydraulic linear motor according to claim 4 is characterized in that: piezoelectric pump adopts 1～10 piezoelectric chip oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200724200U CN201250820Y (en) | 2008-09-12 | 2008-09-12 | Piezoelectric hydraulic linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200724200U CN201250820Y (en) | 2008-09-12 | 2008-09-12 | Piezoelectric hydraulic linear motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201250820Y true CN201250820Y (en) | 2009-06-03 |
Family
ID=40746493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200724200U Expired - Fee Related CN201250820Y (en) | 2008-09-12 | 2008-09-12 | Piezoelectric hydraulic linear motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201250820Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106647540A (en) * | 2017-02-15 | 2017-05-10 | 吉林大学 | Multifunctional displacement table system |
-
2008
- 2008-09-12 CN CNU2008200724200U patent/CN201250820Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106647540A (en) * | 2017-02-15 | 2017-05-10 | 吉林大学 | Multifunctional displacement table system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101354052A (en) | Piezoelectric hydraulic linear motor | |
| CN201705743U (en) | Long-stroke precise stepping driver | |
| CN102691693B (en) | Precision stepping hydraulic cylinder driven by piezo-electricity wafer | |
| CN102691694B (en) | Self-driven precise stepwise hydraulic power device | |
| CN101718291B (en) | Large-flow high-frequency electrohydraulic exciting shock control valve drive system | |
| JP6775034B2 (en) | Piezoelectric hydraulic actuator | |
| CN103016434A (en) | Piezoelectric ceramic direct-driving servo valve based on hydraulic micro-displacement amplification structure | |
| CN108591144B (en) | Hydraulic system of motor-driven double-dosing pump double-accumulator distributed direct-drive excavator | |
| CN100585180C (en) | High-frequency inertia one-way valve hydraulic pumps based on piezoelectric ceramics | |
| CN110043519A (en) | A kind of high efficiency electricity hydrostatic actuator that machinery internal resistance is continuously adjustable | |
| CN201250820Y (en) | Piezoelectric hydraulic linear motor | |
| CN109854557A (en) | A kind of double pump with energy-saving pressure preload unit directly drives electric hydrostatic actuator | |
| CN106762519B (en) | A kind of variable load reciprocating compressor or pump | |
| CN109899328B (en) | Piezoelectric driving type hydraulic motor | |
| CN202040039U (en) | Single-acting hydraulic driving reciprocating plunger pump | |
| CN108843639B (en) | Piezoelectric ceramic type jet pipe valve group | |
| CN201377412Y (en) | Single-film continuous transmission fluid piezoelectric pump | |
| CN108953306A (en) | Duplex pump directly driven volume controlled electro-hydraulic servo control system | |
| CN111306118A (en) | Active flow distribution type electromagnetic direct-drive hydrostatic actuating system | |
| CN202579445U (en) | Precision stepping hydraulic cylinder driven by piezoelectric chip | |
| CN111425471A (en) | Electro-magnetic direct-drive plunger pump driven hydrostatic actuating system | |
| CN110094330B (en) | Self-driving pneumatic device | |
| CN201268397Y (en) | Water pressure drive manipulator for multi-finger and multi-joint underwater operation | |
| CN101514715A (en) | Piezoelectric/electrorheological mixed ultraprecise hydraulic step drive device | |
| CN109869360B (en) | Portable pure water hydraulic system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090603 |