CN208256725U - A kind of annular groove adjusts the pre-fastening structure of height - Google Patents
A kind of annular groove adjusts the pre-fastening structure of height Download PDFInfo
- Publication number
- CN208256725U CN208256725U CN201820731196.5U CN201820731196U CN208256725U CN 208256725 U CN208256725 U CN 208256725U CN 201820731196 U CN201820731196 U CN 201820731196U CN 208256725 U CN208256725 U CN 208256725U
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- China
- Prior art keywords
- upper cover
- annular groove
- piezoelectric transformer
- connecting rod
- fastening structure
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Abstract
Originally practical newly to disclose a kind of pre-fastening structure of annular groove adjusting height, the pretightning force device includes transformer case, and shell includes upper cover, pedestal, is mutually fixedly connected between upper cover and pedestal by elastic component；Wherein, pedestal is provided inwardly with groove, and strip piezoelectric transformer is horizontally placed in groove, and the strip piezoelectric transformer posts downwards thermal coupling element on one side, is equipped with pretightning force bringing device in the mid-point position of the strip piezoelectric transformer；The pretightning force bringing device includes adjustable link, upper lid is equipped with tie rod holes for making connecting rod pass through upper cover, and at the tie rod holes, upper cover thickness is thinner everywhere than remaining, and the connecting rod and upper cover junction are equidistantly equipped with annular groove, the annular groove of the connecting rod is stuck in tie rod holes.Cooling fin is set to radiate under the premise of not influencing the piezoelectric transformer work vibration shape for piezoelectric transformer, and good heat dissipation effect, structure is simple, and it is convenient to realize.
Description
Technical field
Originally practical to be newly related to transformer technology field, especially a kind of annular groove adjusts the pre-fastening structure of height.
Background technique
Piezoelectric transformer working principle is that mechanical energy is converted electrical energy by inverse piezoelectric effect, is then imitated by positive piezoelectricity
Electric energy should be converted mechanical energy into.Loss in entire energy transfer process includes dielectric absorption, piezoelectricity loss and elastic loss.
Because piezoelectric transformer work is in resonance state, the different piezoelectric transformer vibration shape is different, i.e., every bit is corresponding
Stress, strain are different.Electric field and dielectric displacement have very big difference also with the difference of structure.With the development of electronics technology, Gao Gong
Rate, small size have become the inexorable trend of development in science and technology, and piezoelectric ceramics itself possesses make many materials incomparable potential
High power density is the possibility substitute of modern electromagnetic transformers miniaturization, but because material parameter caused by calorific value greatly
Variation, but also the state that piezoelectric transformer work is suitble to is very unstable, therefore its application is confined to the low power density stage, sternly
It is constrained again in the application of large-power occasions, and heating is not so that piezoelectric transformer is able to satisfy the need of development in science and technology caused by loss
It asks.
The power electronic device being often used in industry all considers radiating requirements, is radiated using radiating element, protects
The output power and stability of power device work are demonstrate,proved.For piezoelectric transformer, it is based on same consideration, it is desirable to pass through outside
Auxiliary heat dissipation can bring same ideal effect.However because of the electromechanical properties of piezoelectric transformer operation itself, heat dissipation
The design of device is difficult to common static power device, or even is artificially impossible again, so know today, piezoelectricity transformation
Device is still without matched radiator.
Practical new content
This is practical new to overcome disadvantage of the existing technology, provides the strip piezoelectricity with pretightning force bringing device
Transformer makes cooling fin radiate under the premise of not influencing the piezoelectric transformer work vibration shape for piezoelectric transformer, and heat dissipation effect
Good, structure is simple, and it is convenient to realize.
In order to solve the above technical problems, a kind of this practical new described annular groove adjusts the pre-fastening structure of height, described
Pretightning force device includes transformer case, and shell includes upper cover, pedestal, is connected between upper cover and pedestal by the way that elastic component is mutually fixed
It connects；
Wherein, pedestal is provided inwardly with groove, and strip piezoelectric transformer is horizontally placed in groove, the strip piezoelectricity
Transformer posts downwards thermal coupling element on one side, applies in the mid-point position of the strip piezoelectric transformer equipped with pretightning force
Device；
The pretightning force bringing device includes adjustable link, and upper lid is equipped with tie rod holes and is used to that connecting rod to be made to pass through upper cover,
At the tie rod holes, upper cover thickness is thinner everywhere than remaining, and the connecting rod and upper cover junction are equidistantly equipped with annular groove, institute
The annular groove for stating connecting rod is stuck in tie rod holes, and spring is equipped on the connecting rod, and the spring one end resists upper cover, the other end with
Piezoelectric transformer is connected.
Further, the length of connecting rod is slightly longer than the elastic component.
Further, the elastic component is spring or rubber.
As a preference, the thermal coupling element is copper sheet.
As a preference, being equipped with heat-conducting insulating silicon fat pad between the thermal coupling element and transformer base.
This practical new beneficial effect is:
Compared with prior art, this practical newly pretightning force bringing device by a kind of with spring becomes cooling fin and piezoelectricity
The position that depressor work mode displacement is 0 closely connects, and makes cooling fin under the premise of not influencing the piezoelectric transformer work vibration shape
It radiates for piezoelectric transformer, and good heat dissipation effect, structure is simple, and it is convenient to realize.
Pretightning force bringing device includes adjustable link, and upper lid is equipped with tie rod holes for making connecting rod pass through upper cover, even
At rod aperture, upper cover thickness is thinner everywhere than remaining, and connecting rod and upper cover junction are equidistantly equipped with annular groove, the annular groove card of connecting rod
In tie rod holes.Under different preload force requests, pretightning force can be made adjustable by pressing down on upper cover, be suitble to difference
Piezoelectric transformer is used under cooling requirements, extends its use scope.
Detailed description of the invention
Fig. 1 is this practical new structural schematic diagram.
Specific embodiment
It is newly further elaborated to originally practical with reference to the accompanying drawing:
Common power chip inner core is directly anchored on shell, however for piezoelectric transformer, it is complete however
It is complete to fix the work for being equivalent to and attempting to stop piezoelectric transformer, it will the function that it is transmitted for piezoelectric transformer
Rate and efficiency generate strong influence.In order to guarantee the sufficiently free state of piezoelectric transformer operation, fixed point selection exists
The point that the mode displacement that works is 0, is fixed in dots as far as possible, can reduce the constraint to piezoelectric transformer vibration in this way,
This is the fixed method for being commonly recognized and receiving of piezoelectric transformer.Heat is passed well in order to realize while not being absorbed
The thermal coupling element i.e. conduction material that the vibrational energy and piezoelectric transformer of piezoelectric transformer operation directly contact, needs
Have good heat conductivity, the high characteristic of quality factor.The heating conduction of some liquid (such as silicone oil) is good, but too big because damping,
We do not consider.
Because the size of strip piezoelectric transformer width what thickness direction is relative to length direction very little, therefore longitudinal vibration shape
Piezoelectric transformer, the vibration of what thickness direction of width can be ignored relative to length is rectangular, it is only necessary to consider length direction
Misalignment, to determine displacement smallest point.And the displacement curve vibrated in the longitudinal direction is equivalent to sine curve, center
The displacement at place is zero.It will be used as fixed point herein and apply prestressing force.
In order to export the heat generated when piezoelectric transformer work, pass through Heat Conduction Material, that is, thermal coupling using heat transfer principle
Element transfers heat away from.It is designed specifically to: while will pre-tighten example to be applied to another main surface resonance of piezoelectric transformer is position
The smallest point is moved, is the center of piezoelectric transformer for one first order mode of longitudinal resonance, what heat of piezoelectric transformer realized
The good contact of coupling element, the temperature for leading to heat transfer when reducing piezoelectric transformer work, reaches the mesh for improving transmitting power
's.
It is transferred heat away from simultaneously to realize with extraneous insulation, piezoelectric transformer and thermal coupling element are placed on and lead
On thermal insulation silicone grease pad, the insulation with shell is realized.
Under resonant conditions, friction generates heat for piezoelectric transformer main surface and thermal coupling element main surface contact surface, therefore
The thermal coupling element surface of production must be smooth as far as possible.The piezoelectric transformer electrode surface roughness Ra of prior art production≤
O.2 micron, the micron of piezoelectric transformer main surface plane degree error≤O.3 influence to reduce contact bring to the greatest extent, and pressure
The micron of the thermal coupling element main surface roughness Ra that piezoelectric transformer ground electrode main surface directly contacts≤O.2, meets the above item
Part, the heat that friction generates heat disperses relative to thermal coupling element Secondary piezoelectric transformer are much smaller.If thermal coupling element is led
Electricity, piezoelectric transformer output and input for example same electrode of ground electrode, and a monolith thermal coupling element can be used；Piezoelectric transformer is defeated
If not entering and exporting the same electrode of ground electrode, to be radiated respectively using two pieces of thermal coupling elements to input/output section.
It is not same electrode strip piezoelectric transformer vibration mould if figure is applied to input ground electrode and output ground electrode
The heat dissipating method specific embodiment perspective view of formula and E are to sectional view；This piezoelectric transformer is divided into different for input and output portion
Ground electrode, each label meaning are as follows: l is upper cover, and 2 be pedestal, and 3 be elastic component, and 4 be adjustable link, and 5 be annular groove.From
Copper sheet is embedded into the design of silicone grease pad, copper sheet can also be made to be in relatively fixed position, while ensure that the peace with shell
All insulation.Stablize for piezoelectric transformer ground electrode main surface and cooling fin main surface and be in close contact, while by piezoelectric transformer
Fix, certain pretightning force need to be applied in another main surface of piezoelectric transformer, pretightning force apply medium can for cylinder or
Cuboid, general diameter or longest side length are less than the 1/10 of longest dimension.If pretightning force applies longest in medium main surface
Not less than the pretightning force of Insulating gap and the contact of piezoelectric transformer main surface among piezoelectric transformer to apply medium necessary on side
For electrical insulator；If pretightning force applies the Insulating gap that the longest side of medium main surface is less than among transformer, pretightning force is applied
Adding medium can be non-conducting material or conductive material, here it is proposed that using non-conducting material, because conductive material can drop
The insulation characterisitic of low input/output section.
Specifically, a kind of annular groove provided by the utility model adjusts the pre-fastening structure of height, the pretightning force dress
Setting includes transformer case, and shell includes upper cover, pedestal, is mutually fixedly connected between upper cover and pedestal by elastic component；
Wherein, pedestal is provided inwardly with groove, and strip piezoelectric transformer is horizontally placed in groove, the strip piezoelectricity
Transformer posts downwards thermal coupling element on one side, applies in the mid-point position of the strip piezoelectric transformer equipped with pretightning force
Device；
The pretightning force bringing device includes adjustable link, and upper lid is equipped with tie rod holes and is used to that connecting rod to be made to pass through upper cover,
At the tie rod holes, upper cover thickness is thinner everywhere than remaining, and the connecting rod and upper cover junction are equidistantly equipped with annular groove, institute
The annular groove for stating connecting rod is stuck in tie rod holes, and spring is equipped on the connecting rod, and the spring one end resists upper cover, the other end with
Piezoelectric transformer is connected.Under different preload force requests, pretightning force can be made adjustable by pressing down on upper cover, be suitble to
Piezoelectric transformer is used under different cooling requirements, extends its use scope.
The length of connecting rod is slightly longer than the elastic component, and the elastic component is spring or rubber.
As a preference, the thermal coupling element is copper sheet.
As a preference, being equipped with heat-conducting insulating silicon fat pad between the thermal coupling element and transformer base.
Above-mentioned is only this practical new preferred embodiment, it is noted that for those skilled in the art
For, under the premise of not departing from this practical new principle, several modifications and adaptations can also be made, these modifications and adaptations are also answered
It is considered as this practical new protection scope.
Claims (5)
1. the pre-fastening structure that a kind of annular groove adjusts height, which is characterized in that the pre-fastening structure includes outside transformer
Shell, shell include upper cover, pedestal, are mutually fixedly connected between upper cover and pedestal by elastic component；
Wherein, pedestal is provided inwardly with groove, and strip piezoelectric transformer is horizontally placed in groove, the strip piezoelectricity transformation
Device posts downwards thermal coupling element on one side, is equipped with pretightning force in the mid-point position of the strip piezoelectric transformer and applies dress
It sets；
The pretightning force bringing device includes adjustable link, and upper lid is equipped with tie rod holes for making connecting rod pass through upper cover, in institute
It states at tie rod holes, upper cover thickness is thinner everywhere than remaining, and the connecting rod and upper cover junction are equidistantly equipped with annular groove, the company
The annular groove of bar is stuck in tie rod holes, and spring is equipped on the connecting rod, and the spring one end resists upper cover, the other end and piezoelectricity
Transformer is connected.
2. the pre-fastening structure that a kind of annular groove according to claim 1 adjusts height, which is characterized in that the length of connecting rod
Degree is slightly longer than the elastic component.
3. the pre-fastening structure that a kind of annular groove according to claim 1 adjusts height, which is characterized in that the elastic component
For spring or rubber.
4. a kind of annular groove according to any one of claims 1 to 3 adjusts the pre-fastening structure of height, which is characterized in that
The thermal coupling element is copper sheet.
5. the pre-fastening structure that a kind of annular groove according to claim 4 adjusts height, which is characterized in that the thermal coupling
Heat-conducting insulating silicon fat pad is equipped between element and transformer base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820731196.5U CN208256725U (en) | 2018-05-17 | 2018-05-17 | A kind of annular groove adjusts the pre-fastening structure of height |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820731196.5U CN208256725U (en) | 2018-05-17 | 2018-05-17 | A kind of annular groove adjusts the pre-fastening structure of height |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208256725U true CN208256725U (en) | 2018-12-18 |
Family
ID=66480618
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820731196.5U Expired - Fee Related CN208256725U (en) | 2018-05-17 | 2018-05-17 | A kind of annular groove adjusts the pre-fastening structure of height |
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| CN (1) | CN208256725U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108470822A (en) * | 2018-05-17 | 2018-08-31 | 南京溧水得瑞微型电机厂 | A kind of annular groove adjusts the pre-fastening structure of height |
-
2018
- 2018-05-17 CN CN201820731196.5U patent/CN208256725U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108470822A (en) * | 2018-05-17 | 2018-08-31 | 南京溧水得瑞微型电机厂 | A kind of annular groove adjusts the pre-fastening structure of height |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181218 Termination date: 20190517 |
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| CF01 | Termination of patent right due to non-payment of annual fee |