CN2899119Y - Aluminum-based laminated high-voltage overloading electric driver - Google Patents
Aluminum-based laminated high-voltage overloading electric driver Download PDFInfo
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- CN2899119Y CN2899119Y CN 200620024080 CN200620024080U CN2899119Y CN 2899119 Y CN2899119 Y CN 2899119Y CN 200620024080 CN200620024080 CN 200620024080 CN 200620024080 U CN200620024080 U CN 200620024080U CN 2899119 Y CN2899119 Y CN 2899119Y
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Abstract
The utility model is an aluminum-based laminated high-voltage overloading electric driver belonging to piezoelectric ceramics technical field and aims to solve problems of existing piezoelectric driver such as poor shear- and tension-resistant capabilities and poor overloading-resistant capability in particular and being unable to be used in high-overloading environment. The utility model includes two piezoelectric ceramics laminations of mechanical series-connection and electrical parallel-connection, wherein, between the two piezoelectric ceramics laminations is cemented an aluminum foil substrate; the contact surfaces of the aluminum foil substrate and the piezoelectric ceramics laminations are partly cemented by conductive epoxy; the external surfaces of the two piezoelectric ceramics laminations are connected and act as one pole of the electrode and the aluminum foil substrate acts as the other pole of the electrode. The utility model uniquely introduces the aluminum foil substrate and adopts the mode of transverse shrinking d31, thereby possessing better shear-, tension- and overloading-resistant capabilities and tiddly equivalent capacitance and fast response time (us level), as well as important use value in fields of high-overloading adverse environment such as military affairs, national defense, aviation and spaceflight.
Description
Technical field
The utility model relates to piezoelectric actuator, belongs to the piezoelectric ceramic technology field, is specially a kind of Acuminium-base laminated high-over load piezoelectric driver.
Background technology
Piezoelectric actuator is to utilize the inverse piezoelectric effect of dielectric in electric field directly to convert electrical energy into mechanical energy, produce the inverting element of micrometric displacement, it has advantages such as volume is little, resolution is high, response is fast, low-power consumption, no electromagnetic interference, occupy more and more important position in micron/nano driving and control technology, its application relates to important high-technology fields such as Aero-Space, precision optics, micromachine, laser communications, robot.
It has been recognized that in the moment that applies electric field to piezoelectric ceramic, material will produce controlled strain, and basic contrary piezoelectric equations: S is followed in strain
j=d
IjE
i, wherein S is strain, E is an electric field strength, d
IjBe piezoelectric strain constant, i and j are respectively electric field and should change direction (i and j are 1,2,3, represent X, Y, three directions of Z respectively).Piezoelectric actuator just is based on that this inverse piezoelectric effect makes.Existing piezoelectric actuator mainly contains several versions such as the type of stacking, sheet-type, cast and twin lamella type.What application was maximum in fine motion control is the piezoelectric stack type, and its adopts the version of machinery series connection, electricity parallel connection, utilizes multi-disc piezoelectric ceramic piece bonding or sintering to form, employing longitudinal extension d
33Pattern, flexible along stack direction when added electric field, its displacement L=nd
33U, wherein n is the piezoelectric ceramic piece number, d
33Be piezoelectric strain coefficient (m/V) that U is driving voltage (V).The characteristics of this piezoelectricity fold stack driver are that displacement is big, can bear very big pressure, but there are the following problems: (1) piezoelectricity fold stack driver is anti-shearing, particularly anti-overload ability is poor especially in stretch-proof; (2) equivalent capacity of piezoelectricity fold stack driver big (μ F), the response time is slow (ms level).At present domesticly also the anti-overload ability of legacy drive was not carried out accurately demarcating.Do not see the pertinent literature report of the design and the application thereof of anti high overload piezoelectric actuator yet.
Summary of the invention
The existing piezoelectric actuator of the utility model solution is anti-shearing, particularly anti-overload ability is poor in stretch-proof, can not be applied to the high overload problem of environment, and a kind of Acuminium-base laminated high-over load piezoelectric driver is provided.
The utility model is to adopt following technical scheme to realize: Acuminium-base laminated high-over load piezoelectric driver, the piezoelectric ceramic lamination that comprises two machinery series connection, electricity parallel connection, in the middle of two piezoelectric ceramic laminations, be bonded with an aluminum foil substrate, the contact-making surface of aluminum foil substrate and piezoelectric ceramic lamination (existing bonding in) the local conductive epoxy that adopts is bonding, the outer surface of two piezoelectric ceramic laminations (aluminum foil substrate is outer dorsad) links to each other as a utmost point of electrode, and aluminum foil substrate is another utmost point of electrode.The utility model adopts the aluminium base composite construction form of lamination folder, and promptly novelty is introduced aluminium base in horizontal piezoelectric ceramic lamination.Piezoelectric actuator by this structural design has higher stretch-proof, anti-shearing and anti-overload ability, the suitable high overload environment that is applied to.This driver flakiness strip is transversal stretching d
31Pattern, the polarised direction of two piezoelectric ceramic laminations deviate from or point to aluminium basely, and the output direction of displacement is vertical with polarised direction, and when the driver extra electric field, driver is flexible along its length, its displacement L=d
31LU/d, wherein d
31Be piezoelectric strain constant (m/V) that L is the length (m) of piezoelectric patches, U is driving voltage (V), and d is the thickness (m) of piezoelectric patches.
The utility model is compared with existing Drive technology: (1) this driver provides a kind of new laminated piezoelectric folder aluminium base composite design structure, for the anti high overload design of driver provides the foundation; (2) this driver novelty is introduced aluminum foil substrate, guarantees that it has higher stretch-proof, anti-shearing and anti-overload ability; (3) the piezo stack number of plies of this driver seldom (several) have very little equivalent capacity (tens nF), thereby driver has the very fast response time (μ s level); (4) operating voltage of this driver is low, equivalent capacity is little, thereby the output voltage of the driving power that matches and capacitance load capability is required lower, is easy to realize; (5) this driver adopts transversal stretching d
31Pattern, its stack direction be subjected to force direction vertical, each piezoelectric ceramic piece and aluminium base are subjected to less component under loading condition, thereby guarantee the high load capability and the impact resistance of driver, have important practical value in high overload adverse circumstances fields such as military and national defense, Aero-Space.
Description of drawings
Fig. 1 is an Acuminium-base laminated high-over load piezoelectric driver surface structure schematic diagram described in the utility model;
Fig. 2 is the partial structurtes enlarged drawing of Fig. 1;
Fig. 3 is the STRUCTURE DECOMPOSITION figure of Acuminium-base laminated high-over load piezoelectric driver described in the utility model;
Embodiment
Acuminium-base laminated high-over load piezoelectric driver, the piezoelectric ceramic lamination that comprises two machinery series connection, electricity parallel connection, in the middle of two piezoelectric ceramic laminations, be bonded with an aluminum foil substrate 2, the contact-making surface of aluminum foil substrate 2 and piezoelectric ceramic lamination (existing bonding in) the local conductive epoxy that adopts is bonding, the outer surface of two piezoelectric ceramic laminations (aluminum foil substrate is outer dorsad) links to each other as a utmost point of electrode, and aluminum foil substrate 2 is another utmost point of electrode.The driver two ends snap in and by adhering with epoxy resin in glass fibre mass 1,7; glass fibre mass 1 plays further clamping piezoelectric ceramic lamination and aluminum foil substrate on the one hand; play the protection termination on the other hand, be convenient to driver and be connected with other parts.The piezoelectric ceramic lamination is made of two piezoelectric ceramic pieces 5,6,10,11; The structures shape of this piezoelectric actuator the piezoelectric ceramic lamination can the number of plies seldom, have very little equivalent capacity (tens nF), thereby driver has the very fast response time (μ s level); Certainly the number of plies of piezoelectric ceramic lamination can further increase anti-overload ability like this more than two, but equivalent capacity is wanted corresponding increase.The piezoelectric ceramic piece that constitutes the piezoelectric ceramic lamination is selected the PZT-5A material, and aluminum foil substrate is selected duralumin 1100-H19, by material properties preferably with further increase anti-overload ability.
During concrete the making, at first to aluminum foil substrate and piezoelectric ceramic cut into slices, grinding and clean, geometric properties becomes sliver shape, the thickness of aluminium foil 2 and piezoelectric ceramic piece 5,6,10,11 is respectively tens and a hundreds of micron order; Then to piezoelectric ceramic piece 5 and 6,10 and 11 according to the series connection of the machinery of conventional piezoelectric fold stack driver, electricity parallel way sintering or be bonded to laminated piezoelectric; Secondly stick the epoxy resin 3 and 8 of middle perforate on two surfaces of aluminum foil substrate 2, and pour into conductive epoxy 4 and 9 (conductive epoxy is the current material of public offering on the market), two laminated piezoelectrics and aluminium base bonding together at the aperture place; Secondly the outer surface of two laminated piezoelectrics is linked to each other as a utmost point of electrode, two laminated piezoelectric inner surfaces link to each other as another utmost point with aluminium base by conductive epoxy again; At last bonding aluminium base and laminated piezoelectric two ends are snapped in and are bonded in glass fibre mass 1 and 7.
Claims (3)
1, a kind of Acuminium-base laminated high-over load piezoelectric driver, the piezoelectric ceramic lamination that comprises two machinery series connection, electricity parallel connection, it is characterized by: in the middle of two piezoelectric ceramic laminations, be bonded with an aluminum foil substrate (2), aluminum foil substrate (2) is bonding with the local conductive epoxy that adopts of the contact-making surface of piezoelectric ceramic lamination, the outer surface of two piezoelectric ceramic laminations links to each other as a utmost point of electrode, and aluminum foil substrate (2) is another utmost point of electrode.
2, Acuminium-base laminated high-over load piezoelectric driver as claimed in claim 1 is characterized by: two ends snap in and by adhering with epoxy resin in glass fibre mass (1,7).
3, Acuminium-base laminated high-over load piezoelectric driver as claimed in claim 1 or 2 is characterized by: the piezoelectric ceramic lamination is made of two piezoelectric ceramic pieces (5,6,10,11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620024080 CN2899119Y (en) | 2006-04-11 | 2006-04-11 | Aluminum-based laminated high-voltage overloading electric driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620024080 CN2899119Y (en) | 2006-04-11 | 2006-04-11 | Aluminum-based laminated high-voltage overloading electric driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2899119Y true CN2899119Y (en) | 2007-05-09 |
Family
ID=38074451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620024080 Expired - Lifetime CN2899119Y (en) | 2006-04-11 | 2006-04-11 | Aluminum-based laminated high-voltage overloading electric driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2899119Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100426547C (en) * | 2006-04-11 | 2008-10-15 | 中北大学 | Acuminium-base laminated high-over load piezoelectric driver |
| CN106546486A (en) * | 2017-01-16 | 2017-03-29 | 武汉大学 | Miniature fragile material fracture behaviour test device |
| CN106684239A (en) * | 2017-01-09 | 2017-05-17 | 武汉大学 | Extension type laminated piezoelectric actuator |
-
2006
- 2006-04-11 CN CN 200620024080 patent/CN2899119Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100426547C (en) * | 2006-04-11 | 2008-10-15 | 中北大学 | Acuminium-base laminated high-over load piezoelectric driver |
| CN106684239A (en) * | 2017-01-09 | 2017-05-17 | 武汉大学 | Extension type laminated piezoelectric actuator |
| CN106546486A (en) * | 2017-01-16 | 2017-03-29 | 武汉大学 | Miniature fragile material fracture behaviour test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20081015 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |