CN109162907A - A kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving - Google Patents
A kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving Download PDFInfo
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- CN109162907A CN109162907A CN201811005843.5A CN201811005843A CN109162907A CN 109162907 A CN109162907 A CN 109162907A CN 201811005843 A CN201811005843 A CN 201811005843A CN 109162907 A CN109162907 A CN 109162907A
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- high frequency
- outer housing
- piezoelectric ceramic
- converter based
- pulse pneumatic
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
- F04B45/047—Pumps having electric drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention discloses a kind of pulse pneumatic converters based on high frequency piezoelectric ceramic driving, including piezoelectric pile, flexible vibration diaphragm, hole piston bar and outer housing, piezoelectric pile, flexible vibration diaphragm and hole piston bar are successively set in outer housing from top to bottom, air inlet is provided on outer housing, air inlet is connected to hole piston bar.The present invention it is easily controllable, compact-sized, small in size, working frequency is high, at low cost, be adapted to institute it is in need progress pressure conversion gas circuit, can be inserted into whenever and wherever possible and need in the gas circuit for carrying out pressure conversion and biggish additional mass will not be generated.
Description
Technical field
The invention belongs to stream pressure conversion equipment technical fields, and in particular to it is a kind of based on high frequency piezoelectric ceramic driving
Pulse pneumatic converter.
Background technique
Currently, the pressure conversion device research to air-flow is less, existing device is generally to be grafted onto the function of switch
On conversion equipment, by the folding of the blow vent on control converter, make to generate rule oscillation by the pressure stabilizing air-flow of blow vent,
Obtain default magnitude and frequency spectrum takes pressure pulse pneumatic.But the working frequency of the airflow convertor with conventional drives
Lower, volume is larger and interference is more, is not easy to access gas circuit, mechanical resistance is big, is easily damaged.
Piezoelectric ceramics energy density is big, rapid dynamic response speed, control precision are high, at low cost, be widely used in driver and
Sensor material, working frequency is very high, and is easy to implement to be precisely controlled by voltage, but deflection is smaller, restricts it directly
It uses, can be realized with mating corresponding displacement amplifying mechanism.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of based on high frequency
Pressure stabilizing air-flow can be changed into the pulse pneumatic of needs by the pulse pneumatic converter of Piezoelectric Ceramic, and working frequency is more general
Logical derailing switch effectively improves, while being inserted into needing the gas circuit for carrying out pressure conversion and will not generate larger additional matter
Amount.
The invention adopts the following technical scheme:
A kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving, including it is piezoelectric pile, flexible vibration diaphragm, with holes
Piston rod and outer housing, piezoelectric pile, flexible vibration diaphragm and hole piston bar are successively set in outer housing from top to bottom, shell
Air inlet is provided on body, air inlet is connected to hole piston bar.
Specifically, the top surface of piezoelectric pile and outer housing are affixed, bottom surface and the hard core of flexible vibration diaphragm are affixed.
Further, several holes are provided on the outer ring of flexible vibration diaphragm, it is affixed with outer housing by fastening bolt.
Specifically, be provided with the first sealing ring between flexible vibration diaphragm and outer housing, flexible vibration diaphragm and first close
Seal, outer housing and hole piston bar constitute closed hydraulic cavities together.
Further, the junction of hole piston bar and shell is provided with the second sealing ring in hydraulic cavities.
Further, hydraulic cavities include upper and lower two active chambers, and the end area of upper chamber is greater than the end area of lower chambers.
Further, the ratio between end area of upper chamber and lower chambers is (20~40): 1.
Specifically, the junction of outer housing and hole piston bar is provided with reset spring, hole piston bar is by resetting bullet
Spring is connect with outer housing.
Specifically, shell is made of light material.
Specifically, flexible vibration diaphragm is made of spring steel material, the slim segment thickness of flexible vibration diaphragm is 0.8~
1mm。
Compared with prior art, the present invention at least has the advantages that
A kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving of the present invention, replaces living with flexible vibration diaphragm
Plug, motion frequency are high, and air inlet is connected to hole piston bar, and displacement amplifying mechanism uses hydraulic, and Anti-pull-press ability is strong, Ke Yicheng
By the strong air pressure from gas circuit, durability is strong；Working frequency is higher, and volume is smaller, and control precision is higher, at low cost.
Further, when giving the voltage of specific frequency spectrum, piezoelectric ceramics can quick response to keep converter output same
The voltage of frequency spectrum, this is that other types converter is difficult to realize.
Further, the end area of the up and down part of hydraulic cavities small one and large one, and due to the liquid bulk in seal chamber
Product is constant always, then the small axial displacement that flexible vibration diaphragm generates is transmitted at piston rod and can be amplified, the ratio of amplification
Depending on two area ratios.
Further, reset spring can produce restoring force, and hydraulic and flexible vibration diaphragm is allowed to recover to original position.
Further, when shell is using light material, the quality of converter can be made small as far as possible, in order to be inserted into
When gas circuit, whole system will not be made to generate larger additional mass.
Further, flexible vibration diaphragm is made of spring steel material, it is ensured that diaphragm have it is enough elasticity with
Rigidity can continue to generate smaller deformational displacement with excitation.The slim segment thickness of diaphragm is 0.8~1mm, is located in diaphragm
Between the thick circle of hard core and periphery that centre connects with driving source, range of values of thickness, which depends on diaphragm, can be generated when maximum vibration is displaced
Optimum value, while to guarantee certain stiffness and strength, the ideal thickness range of this converter is 0.8~1mm.
In conclusion the present invention is easily controllable, compact-sized, small in size, working frequency is high, at low cost, it is adapted to own
Need to carry out the gas circuit of pressure conversion, can be inserted into whenever and wherever possible need in the gas circuit for carrying out pressure conversion and will not generate compared with
Big additional mass.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is mathematical model system block diagram of the invention；
Fig. 3 is the simulation comparison figure of output displacement and piezoelectric pile deflection of the invention；
Fig. 4 is output pressure analogous diagram；
Fig. 5 is the fluctuation pressure power spectral density plot calculated according to empirical equation；
Fig. 6 is the live fluctuation pressure power spectral density plot measured.
Wherein: 1. piezoelectric piles；2. fastening bolt；3. flexible vibration diaphragm；4. the first sealing ring；5. hydraulic cavities；6. shell；
7. the second sealing ring；8. reset spring；9. air inlet；10. hole piston bar.
Specific embodiment
In the description of the present invention, it is to be understood that, term " center ", "upper", "lower", "front", "rear", "top",
The orientation or positional relationship of the instructions such as "bottom", "inner", "outside", " side ", " one end ", " one side " is orientation based on the figure
Or positional relationship, it is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning
It must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.In addition,
Term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicate
The quantity of indicated technical characteristic." first " is defined as a result, the feature of " second " can explicitly or implicitly include one
A or more this feature.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or two with
On.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
The present invention provides a kind of pulse pneumatic converters based on high frequency piezoelectric ceramic driving, using Piezoelectric Ceramic
Airflow convertor, make the pressure stabilizing air-flow of entrance after the conversion equipment exit formed specific frequency spectrum containing pressure pulsation gas
Stream.So that its deflection is can reach grade using piezoelectric patches superposition and closed hydraulic pressure chamber displacement equations principle, is pressed by control
The input voltage of electroceramics come control its output vibration displacement amount, enable the blow vent of device to follow the vibration of piezoelectric ceramics
It is dynamic to realize periodically folding, so that the pressure stabilizing air-flow flowed through becomes specific pulse pneumatic.
Referring to Fig. 1, a kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving of the present invention, including piezoelectric pile 1,
Fastening bolt 2, flexible vibration diaphragm 3, the first sealing ring 4, the second sealing ring 7, hydraulic cavities 5, outer housing 6, reset spring 8, into
Port 9, hole piston bar 10 set gradually piezoelectric pile 1, flexible vibration diaphragm 3, hydraulic cavities 5 and band in outer housing 6 from top to bottom
Hole piston rod 10 is arranged the first sealing ring 4, is provided with air inlet 9, air inlet on shell 6 between flexible vibration diaphragm 3 and outer housing 6
Mouth 9 is connect with the hole of hole piston bar 10.
The top surface of piezoelectric pile 1 is fixed in outer housing 6, reserves and connects wires, the thick hard core among bottom surface and flexible vibration diaphragm 3
It is connected.
Several holes are uniformly provided on the thick outer ring of flexible vibration diaphragm 3, shell 6, flexibility vibration are fixed on by fastening bolt 2
Slim diaphragm portion of the dynamic diaphragm 3 between thick hard core and thick outer ring is then used to generate axial vibration；
Flexible vibration diaphragm 3 is made of the good spring steel material 65Mn of elastoplasticity, and slim segment thickness is 0.8~1mm
Between；Remaining parts are made according to standard component.
Flexible vibration diaphragm 3 together forms close with the first sealing ring 4, outer housing 6 and the hole piston bar 10 of lower part
The hydraulic cavities 5 closed, the end area of the up and down part of hydraulic cavities 5 small one and large one, then the small axis that flexible vibration diaphragm 3 generates
Being transmitted to hole piston bar 10 to displacement can be amplified；
In addition, the end area one of the up and down part of hydraulic cavities 5, i.e. flexible vibration diaphragm 3 and hole piston bar 10 is big
One is small, and since the liquid volume in hydraulic cavities 5 is constant always, then the small axial displacement that flexible vibration diaphragm 3 generates is transmitted to
It can be amplified at hole piston bar 10, the ratio of amplification depends on area ratio, and the displacement that flexible vibration diaphragm 3 generates is by piezoelectricity
Heap 1 drives.
Hole piston bar 10 is connected with reset spring 8, is finally secured on outer housing 6, hole piston bar 10 and shell 6
Junction is provided with the second sealing ring 7.
Preferably, shell 6 is made of light material.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being described and shown in usually here in attached drawing is real
The component for applying example can be arranged and be designed by a variety of different configurations.Therefore, below to the present invention provided in the accompanying drawings
The detailed description of embodiment be not intended to limit the range of claimed invention, but be merely representative of of the invention selected
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Referring to Fig. 2, being the mathematical model according to pulse pneumatic converter and the air-channel system accessed in MATLAB/
The structure simulation figure established in SIMULINK, left end are single frequency sinusoidal signal, swept-frequency signal and stochastic inputs signal, Ke Yi
In simulation process using one of which as voltage input signal, then successively include from left to right piezoelectric pile constitutive model,
Flexible vibration diaphragm, hydraulic cavities, the mathematical model of small piston, finally export flexible vibration diaphragm, small piston displacement and go out
The output pressure value of port.The purpose of emulation is that the atmospheric pressure value of air-channel system end is obtained according to set input voltage, and understanding should
The performance of pulse pneumatic converter.
Referring to Fig. 3, preset 5 both ends area ratio of hydraulic cavities is 25, i.e. flexible vibration diaphragm 3 and hole piston bar 10
Area ratio be 25, even if also piezoelectric pile 1 deflection amplify 25 times.
5 both ends area ratio of hydraulic cavities is generally (20~40): 1, ratio can carry out calculating design according to actual needs,
The purpose of converter design be according to project demand when input air pressure pressure be a few megapascal when, can output pressure be reached
105Pa。
Input the random voltages signal that amplitude is 150V, the solid line X in figure1Represent the output displacement of small piston, dotted line X2
Represent the strain displacement of flexible vibration diaphragm.It can be seen that, X1Always X is quickly followed2There is not hydraulic bring response in variation
Delay.Arbitrarily take value at therein two, X1Peak value be respectively as follows: 1.434*10-3M and 1.296*10-3M, X2Peak value be respectively
6.017*10-5M and 5.777*10-5M, the magnification ratio of displacement are respectively that 23.83 and 22.43 meet the requirements close to 25 times.
Referring to Fig. 4, input random voltages signal identical with Fig. 3, specified inlet extraneous gas gas pressure are
2.9MPa, as can be seen from Figure, gas outlet pressure value is in 1.7*105Above Pa, compared to inlet pressure, about original 1/ is decayed to
10 or so.
Fig. 5 and Fig. 6 are please referred to, can be seen that the fluctuation pressure power spectral density of rule of thumb formula calculation in Fig. 5 exponentially
Decline；Fig. 6 is fluctuation pressure power spectral density plot of the test using the excitation of sine sweep signal, is equally exponentially declined, but
Curve is recessed more, illustrates to decay faster with the increase of frequency.The present invention known to comparing two figures can be realized exemplary power
The simulation of spectrum density feature.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (10)
1. a kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving, which is characterized in that including piezoelectric pile (1), flexibility
Vibrating diaphragm (3), hole piston bar (10) and outer housing (6), piezoelectric pile (1), flexible vibration diaphragm (3) and hole piston bar
(10) be successively set in outer housing (6), be provided on outer housing (6) air inlet (9) from top to bottom, air inlet (9) with it is with holes
Piston rod (10) connection.
2. a kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving according to claim 1, which is characterized in that
The top surface of piezoelectric pile (1) and outer housing (6) are affixed, and the hard core of bottom surface and flexible vibration diaphragm (3) is affixed.
3. a kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving according to claim 1 or 2, feature exist
In, several holes are provided on the outer ring of flexible vibration diaphragm (3), it is affixed by fastening bolt (2) and outer housing (6).
4. a kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving according to claim 1, which is characterized in that
It is provided between flexible vibration diaphragm (3) and outer housing (6) the first sealing ring (4), flexible vibration diaphragm (3) and the first sealing ring
(4), outer housing (6) and hole piston bar (10) constitute closed hydraulic cavities (5) together.
5. a kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving according to claim 4, which is characterized in that
The junction of the interior hole piston bar (10) of hydraulic cavities (5) and shell (6) is provided with the second sealing ring (7).
6. a kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving according to claim 4, which is characterized in that
Hydraulic cavities (5) include upper and lower two active chambers, and the end area of upper chamber is greater than the end area of lower chambers.
7. a kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving according to claim 6, which is characterized in that
The ratio between end area of upper chamber and lower chambers is (20~40): 1.
8. a kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving according to claim 1, which is characterized in that
The junction of outer housing (6) and hole piston bar (10) is provided with reset spring (8), and hole piston bar (10) passes through reset spring
(8) it is connect with outer housing (6).
9. a kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving according to claim 1, which is characterized in that
Shell (6) is made of light material.
10. a kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving according to claim 1, feature exist
In flexible vibration diaphragm (3) is made of spring steel material, and the slim segment thickness of flexible vibration diaphragm (3) is 0.8~1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811005843.5A CN109162907B (en) | 2018-08-30 | 2018-08-30 | A kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811005843.5A CN109162907B (en) | 2018-08-30 | 2018-08-30 | A kind of pulse pneumatic converter based on high frequency piezoelectric ceramic driving |
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| Publication Number | Publication Date |
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| CN109162907A true CN109162907A (en) | 2019-01-08 |
| CN109162907B CN109162907B (en) | 2019-07-19 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030031572A1 (en) * | 2001-08-09 | 2003-02-13 | Tearle Stephen Paul | Personal air sampling system and pump for use therein |
| CN1399070A (en) * | 2002-09-03 | 2003-02-26 | 吉林大学 | Multiple-cavity piezoelectric film driven pump |
| CN101699743A (en) * | 2009-11-11 | 2010-04-28 | 西安交通大学 | Symmetric tension-compression double piezoelectric pile actuator |
| JP2012036789A (en) * | 2010-08-05 | 2012-02-23 | Techno Takatsuki Co Ltd | Electromagnetic vibration type pump |
| CN105822527A (en) * | 2016-03-24 | 2016-08-03 | 北京理工大学 | Multifunctional fluid distribution system driven by piezoelectric ceramic and driving method thereof |
-
2018
- 2018-08-30 CN CN201811005843.5A patent/CN109162907B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030031572A1 (en) * | 2001-08-09 | 2003-02-13 | Tearle Stephen Paul | Personal air sampling system and pump for use therein |
| CN1399070A (en) * | 2002-09-03 | 2003-02-26 | 吉林大学 | Multiple-cavity piezoelectric film driven pump |
| CN101699743A (en) * | 2009-11-11 | 2010-04-28 | 西安交通大学 | Symmetric tension-compression double piezoelectric pile actuator |
| CN101699743B (en) * | 2009-11-11 | 2011-12-07 | 西安交通大学 | Symmetric tension-compression double piezoelectric pile actuator |
| JP2012036789A (en) * | 2010-08-05 | 2012-02-23 | Techno Takatsuki Co Ltd | Electromagnetic vibration type pump |
| CN105822527A (en) * | 2016-03-24 | 2016-08-03 | 北京理工大学 | Multifunctional fluid distribution system driven by piezoelectric ceramic and driving method thereof |
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| Publication number | Publication date |
|---|---|
| CN109162907B (en) | 2019-07-19 |
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