Piezoelectric drive of high economic efficiency

FIELD: piezoelectric drives.

SUBSTANCE: proposed piezoelectric drive characterized in high economic efficiency has housing accommodating thin-walled piezoelectric cylinder, electrodes exciting resonance-tuned bending vibrations, and at least two multilayer cylinders shielded by wear-resistant flexible shells within housing. Multilayer cylinders are assembled by inserting one into other for alternate vibration in convexo-concave manner relative to one another thereby varying cylinder-to-cylinder space filled with material in the form of liquid or air. This material in the form of liquid or air brought to water hammer condition in conjunction with hydraulic ram or supersonic air speed creates superfluidity of material in the form of liquid or air. In addition, proposed device is distinguished by high mechanical endurance at system resonance ensuring superconductivity; the latter and multilayer cylinders jointly provide for minimal voltage requirement for exciting and passing maximal current.

EFFECT: enhanced economic efficiency, ability of handling considerable forces and displacements.

2 cl, 2 dwg

 

The invention relates to a piezoelectric actuator, can be used when working with motors are highly efficient, clean, and cold.

Known piezoelectric resonator (RF patent 1419481), comprising a housing, a convexo-concave piezoelectric plate, stimulating electrodes and openings in the casing for filling the inner volume of the cavity fluid.

The disadvantages of the known devices is the ability to conduct small movements and transfer of small efforts: first, due to convexo-concave piezoelectric plates in the form of ellipsoids, it provides a small surface area and consequently low productivity and volume; secondly, low efficiency due to large consumption of electricity.

The closest and adopted for the prototype of the claimed device is miropraviteli (WMU. Piezoresonance sensors. M: Energoatom, 1968, s-213 - prototype)containing a thin-walled piezoelectric cylinder, the excitation electrodes for creating a resonant Flexural vibrations of the cylinder.

The disadvantages of the known technical solutions can be attributed to the fact that in the known drive small displacements occur and are transmitted to a minor effort.

The proposed solution is aimed at is the importance of the above-mentioned disadvantages of the known device. Using it can be obtained the following technical result: obtaining a closed Autonomous energy complex as a result of application of the piezoelectric actuator significant effort and movements in combination with a hydraulic material, such as liquid, air, and use it with an environmentally friendly engine. The drive parameters depend on the characteristics of the material of the piezoceramic plates.

This is due to the fact that high-efficiency piezoelectric actuator, comprising a housing, which has a thin-walled piezoelectric cylinder, the electrodes excite the resonant Flexural vibrations, contains at least two multilayer cylinder, secure flexible wear-resistant casing and mounted in the housing. When this multilayer cylinders are assembled by inserting them into each other, with the possibility of vibrations alternately convex-concave one relative to another, changing this millinery volume, filled with matter in the form of liquid or air. Substance in the form of liquid or air, is provided in the regime of hydraulic shock in combination with a hydraulic RAM or supersonic velocity, provide superfluidity substances in the form of liquid or air. The system operates as a motor (pump, comp is essor) - a generator. In order to reduce friction between the cylinder walls and the substance in the form of liquid or air, reducing the temperature of compressed air (if the substance is air), obtaining significant performance and increase efficiency chart of the cycle when the pressure in the proposed device are provided structurally, the durability of the drive system resonance, providing superconductivity, which multilayer cylinders creates minimal consumption voltage for excitation and of course the maximum current. And when returning the system to its original state with high economic efficiency, the drive generates electricity in the system. The system operates as a motor (pump, compressor) - generator. The main advantage of this drive is that it provides high efficiency, the transmission of large forces and displacements, and in combination with a hydraulic RAM (substance - liquid) and with clean engine is converted into a closed Autonomous energy complex, with minimum heat loss energy and emission into the environment.

The essence of the claimed device illustrated by the drawings:

Fig 1 - drive, General view;

figure 2 - scheme of work cycles.

Position in the figures denote: block 1; the electrode 2; a cylinder 3; g is bkie, wear the shell 4, the inlet valve 5 and exhaust valve 6; case 7; cover 8; gasket 9; the pipeline 10.

The actuator consists of a body 7, the caps 8, spacers 9. Inside the housing 7 has a multilayer piezoceramic cylinders 3, protected by wear-resistant flexible membrane 4, the electrodes 2 are located at the ends of the shell 4 for excitation of oscillations (with the signs + and - polarizing capacity). Between the cylinders 3 insulating spacers 9 are ring (slotted) inlet 5, the exhaust valve 6, the lid 8 is attached to the pipes 10 connected to the hydraulic RAM (figures not shown), environmentally friendly engine (figures not shown) and the control unit 1.

The device operates as follows.

With control unit 1 serves voltage UIN to the electrodes 2 for excitation of vibrations of the multilayer piezoceramic cylinders 3, protected by wear-resistant flexible membrane 4. The device consumes power and is operating as a motor. Thus, forming of the outer cylinder 3 has a convex inner cylinder 3 - concavity, the cylinders 3 are derived from the equilibrium position, millinery volume increased to the maximum. This automatically inlet valve 5 is opened, the exhaust valve 6 is closed, the voltage UB power supply 1 removed, the cylinders 3 are returned in Exodus is the initial position, millinery volume increases, the process automatically inlet valve 5 is opened, the exhaust valve 6 is closed, the system generates electricity and operates as a generator.

In addition, the proposed actuator in combination, if necessary, with a hydraulic RAM and environmentally friendly engine is converted into a closed energy complex. Here we have in mind the possibility of other examples of constructive perform. High-performance piezoelectric actuator can operate in motor mode (pump, compressor) with a hydraulic RAM (if necessary) and with clean engine as a closed energy complex.

1. High-efficiency piezoelectric actuator, comprising a housing, which has a thin-walled piezoelectric cylinder with electrodes that excite resonant Flexural vibrations, characterized in that the housing contains at least two multilayer thin-walled piezoelectric cylinder with a flexible protective wear-resistant shells and collected by inserting one into another, with the possibility of vibrations alternately convex-concave with respect to one another, except that the actuator further comprises a substance in the form of liquid or air filling millinery volume, changing under the influence of fluctuations Mogol is inih cylinders.

2. The actuator according to claim 1, characterized in that the device is a closed Autonomous energy complex with minimum heat loss energy and emission into the environment.



 

Same patents:

FIELD: flaw inspection of rolling stock and tubes.

SUBSTANCE: ultrasonic transducer lattice has base, piezoids, grounded and pulse electrodes for connection to respective probing-pulse generators; it can be assembled, for instance, of plurality of equal-size piezoids fully insulated from one another; base is made in the form of one- or two-sided organic glass prism whose surfaces are stepped; each piezoid is glued to step parallel to other step partially overlapping the latter; idle parts of piezoids are depolarized; lattice is potted in compound; installation and overall dimensions of piezoids meet following equations: a = 1.2b to 100b, where a is piezoid length; b is piezoid thickness; d > (1 to 10)p, where d is distance between axes of piezoid effective parts; p is length of piezoid effective part; d = 0.2 to 10 mm.

EFFECT: simplified design of ultrasonic transducer lattice.

1 cl, 1 dwg

FIELD: piezoelectric electromechanical drives or packaged sensory components.

SUBSTANCE: proposed drive or sensory component has several piezoelectric ceramic layers. Electrode layer and electrical connector protruding outside are disposed between two layers whose surfaces are facing one another and directly abutting against one another. At least one of two piezoceramic layer surfaces facing one another is provided with groove to receive at least part of electrical connector.

EFFECT: enhanced precision under impact of high temperatures and heavy steady state and transient loads.

15 cl, 7 dwg

FIELD: optics.

SUBSTANCE: proposed converter designed for operation as actuating device in adaptive optical systems has multilayer stack of plates electrically connected in parallel with double-layer ferroelectric ceramic plate with diffused phase transition. One layer of double-layer plate has slot of depth equal to thickness of this layer. Axes of slots in adjacent double-layer plates are disposed in relatively perpendicular planes.

EFFECT: elongated travel distance of operating element, enhanced time and temperature stability.

1 cl, 2 dwg

The invention relates to a multilayer piezoelectric actuators

The invention relates to measuring devices and is intended for use in the vibration sensors

The invention relates to ultrasonic transducers and devices for sound fluid and can be used in electronic, machine-building and other industries

FIELD: optics.

SUBSTANCE: proposed converter designed for operation as actuating device in adaptive optical systems has multilayer stack of plates electrically connected in parallel with double-layer ferroelectric ceramic plate with diffused phase transition. One layer of double-layer plate has slot of depth equal to thickness of this layer. Axes of slots in adjacent double-layer plates are disposed in relatively perpendicular planes.

EFFECT: elongated travel distance of operating element, enhanced time and temperature stability.

1 cl, 2 dwg

FIELD: piezoelectric electromechanical drives or packaged sensory components.

SUBSTANCE: proposed drive or sensory component has several piezoelectric ceramic layers. Electrode layer and electrical connector protruding outside are disposed between two layers whose surfaces are facing one another and directly abutting against one another. At least one of two piezoceramic layer surfaces facing one another is provided with groove to receive at least part of electrical connector.

EFFECT: enhanced precision under impact of high temperatures and heavy steady state and transient loads.

15 cl, 7 dwg

FIELD: flaw inspection of rolling stock and tubes.

SUBSTANCE: ultrasonic transducer lattice has base, piezoids, grounded and pulse electrodes for connection to respective probing-pulse generators; it can be assembled, for instance, of plurality of equal-size piezoids fully insulated from one another; base is made in the form of one- or two-sided organic glass prism whose surfaces are stepped; each piezoid is glued to step parallel to other step partially overlapping the latter; idle parts of piezoids are depolarized; lattice is potted in compound; installation and overall dimensions of piezoids meet following equations: a = 1.2b to 100b, where a is piezoid length; b is piezoid thickness; d > (1 to 10)p, where d is distance between axes of piezoid effective parts; p is length of piezoid effective part; d = 0.2 to 10 mm.

EFFECT: simplified design of ultrasonic transducer lattice.

1 cl, 1 dwg

FIELD: piezoelectric drives.

SUBSTANCE: proposed piezoelectric drive characterized in high economic efficiency has housing accommodating thin-walled piezoelectric cylinder, electrodes exciting resonance-tuned bending vibrations, and at least two multilayer cylinders shielded by wear-resistant flexible shells within housing. Multilayer cylinders are assembled by inserting one into other for alternate vibration in convexo-concave manner relative to one another thereby varying cylinder-to-cylinder space filled with material in the form of liquid or air. This material in the form of liquid or air brought to water hammer condition in conjunction with hydraulic ram or supersonic air speed creates superfluidity of material in the form of liquid or air. In addition, proposed device is distinguished by high mechanical endurance at system resonance ensuring superconductivity; the latter and multilayer cylinders jointly provide for minimal voltage requirement for exciting and passing maximal current.

EFFECT: enhanced economic efficiency, ability of handling considerable forces and displacements.

2 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: radiator of plane ultrasonic wave represents coaxial construction containing the set of piezoelements in the form of plane rings, which is enveloped on two sides with parts made in the form of bushes. In holes of piezoelements and bushes, along the construction axis there arranged is resonant waveguide acoustic transformer. This transformer serves as tie bar as well. At that, projection of connection of tie bar and the second bush to radiator axis includes the point belonging to the plane of equal amplitudes of coupled vibrations of itself and the construction tied with it if it can be assumed solid and when there is no that connection. Radiator can include several sets of piezoelements alternating with bushes and tied with common tie bar, which increases mechanical radiation power proportionally to the number of those sets.

EFFECT: increasing efficiency owing to decreasing energy losses in mechanical connections of its vibrating system.

1 tbl, 4 dwg

FIELD: electricity.

SUBSTANCE: piezoelectric drive with 3D packet piezoelement for installation on basic structure has at least one surface of packet piezoelement, which is exposed to 2D or 3D profiling perpendicularly to layers of packet, and this at least one profiled surface is fit to circuit of basic structure, at which drive should be installed.

EFFECT: invention provides for high capacity of piezoelement and piezoelectric drive with simultaneous elimination of piezoelement damage risk in process of installation onto part.

17 cl, 12 dwg

FIELD: electricity.

SUBSTANCE: piezoelectric device consists of a number of stacked layers of piezoceramic material. Each layer has two flat inner electrodes with engagement factor less than 100%; they contact in sequence with either left or right external electrodes which are located at side wall of the device. The device also contains additional uniformly distributed layers of material with high thermal conductivity, for example, aluminium nitride (AlN), beryllium oxide (BeO) or silicon carbide (SiC) or similar materials. Thickness of additional layers is not less than thickness of piezoceramic layers. Number of additional layers is determined by ratio for product of thickness, number of layers and thermal conductivity of main and additional layers.

EFFECT: reduction of inner temperature gradients, improvement of reliability and operating life.

2 cl, 1 dwg

FIELD: physics.

SUBSTANCE: acoustic line is made in form of a rectangular prism. Further, optically antireflecting coatings are deposited via vacuum deposition onto the faces of the rectangular prism. A first adhesive layer is then deposited on one of the faces of the rectangular prism by vacuum deposition. Using vacuum deposition, a first gold layer is deposited on said first adhesive layer. Further, a first indium layer is deposited on said first gold layer by vacuum deposition. Also, using vacuum deposition, a second adhesive layer is deposited on one of the larger faces of each of two plates made from lithium niobate of the (Y+36)-section. Using vacuum deposition, a second gold layer is then deposited on said second adhesive layer. Using vacuum deposition, a second indium layer is deposited on said second gold layer. The acoustic line is the joined with the lithium niobate plates by pressing the lithium niobate plates with the pressure of each lithium niobate plate of the second indium layer to the corresponding first indium layer. Each of the lithium niobate plates is then ground off to the required thickness which corresponds to the operating frequency band. Using vacuum deposition, a third adhesive layer is deposited on each free large face of each lithium niobate plate. A third gold layer is then deposited on said third adhesive layer via vacuum deposition. The method is characterised by that the acoustic line material used is a TeO2 monocrystal, wherein the faces of the rectangular prism are directed perpendicular to the crystallographic direction [001], , [110], and deposition of optically antireflecting coatings is carried out on faces of the rectangular prism which are perpendicular to the the crystallographic direction ; when joining the lithium niobate plates to the acoustic line, the projections of polar axes of the lithium niobate plates are directed onto the same plates in opposite sides; the first adhesive layer is deposited on one of the faces of the rectangular prism (001); the first, second and third adhesive layers are made from chromium; said pressure lies in the range of 50-100 kg/cm2, during at least part of the time when the lithium niobate plates are pressed to acoustic line; voltage of 10-50 V is applied across each lithium niobate plate at antiresonance longitudinal vibrations of the corresponding lithium niobate plate for 1-3 minutes; the resulting workpiece, which is in form of an acoustic line with antireflection coatings, first adhesive layer, first gold layer and first indium layer lying successively on the acoustic line, and successively lying second indium layer, second gold layer, second adhesive layer of one of the lithium niobate plates and the lithium niobate plate itself, as well as the nearby successively lying second indium layer, second gold layer, second adhesive layer of another lithium niobate plate and the lithium niobate plate itself, as well as the third adhesive layer and third gold layer lying on each of said lithium niobate plates, is cut into separate elements in parallel to planes (110) of the TeO2 monocrystal.

EFFECT: high efficiency of the device while simultaneously increasing efficiency of the manufacturing process.

1 cl, 3 dwg

FIELD: physics.

SUBSTANCE: piezoelectric multilayer component has a stack (1) of piezoceramic layers (2) and electrode layers (3) arranged one above the other. At least one piezoceramic layer is printed with a layer (4) structured according to a predefined configuration in a piezoelectrically inactive zone of the stack. The structured layer has at least one connecting element (4a) by which piezoceramic layers which are adjacent in the stacking direction are mechanically connected to each other with a first strength. The structured layer has interspaces (4b) filled at least in part with piezoceramic material of the adjacent piezoceramic layers. The adjacent piezoceramic layers in the interspaces are mechanically connected to each other with a second strength, which is less than the first strength.

EFFECT: longer extension and period of operation.

15 cl, 1 tbl, 4 dwg

FIELD: physics.

SUBSTANCE: invention relates to making magnetoelectric converters used as a base for magnetic field sensors, microwave electronic devices, for magnetoelectric information recording technology and for electromagnetic energy and vibration energy storages. The method involves forming a stack of alternating magnetostrictor and piezoceramic layers. Said stack is formed in three steps: first, electroconductive contacts are deposited on the entire surface of magnetostrictors; all surfaces of magnetostrictors and piezoceramic, except end surfaces, are coated with a layer of electroconductive epoxy adhesive, after which a stack of alternating magnetostrictor and piezoceramic layers is formed. The layers are joined by pressing at temperature of 60-100C and excess pressure of (1.3-2.6)105 Pa. The multilayer ceramic heterostructure contains 9-11 magnetostrictor and piezoceramic layers. The piezoeceramic layer has thickness of 0.10-0.13 mm and the magnetostrictor layer has thickness of 0.25-0.30 mm.

EFFECT: low power consumption and high sensitivity.

2 cl, 2 tbl, 4 dwg

Up!