CN202221323U - Casing structure of ultrasonic energy converter - Google Patents
Casing structure of ultrasonic energy converter Download PDFInfo
- Publication number
- CN202221323U CN202221323U CN2011202507879U CN201120250787U CN202221323U CN 202221323 U CN202221323 U CN 202221323U CN 2011202507879 U CN2011202507879 U CN 2011202507879U CN 201120250787 U CN201120250787 U CN 201120250787U CN 202221323 U CN202221323 U CN 202221323U
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- self
- damping plate
- casing
- damping
- damping plates
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Abstract
Provided is a casing structure of an ultrasonic energy converter. A casing is a cylinder, two ends of the casing are concave open ends, and a central hole is arranged on the casing. The casing structure is characterized in that the casing is a step-shaped cylinder, at least one group of self-damping plates is arranged in the middle of the casing, and the self-damping plates and the casing are made of the same material and processed integrally. Gaps are arranged between the self-damping plates and the casing on two sides of the self-damping plates. The self-damping plates are divided into 2 to 3 groups. The appearance of the self-damping plates is circular, or surfaces on two sides of the self-damping plates are wave-shaped, or the two sides of the self-damping plates are in a shape of a concave surface. For the transmission energy converter, the effect of the self-damping plates is to reduce or even eliminate externally-transmitted disturbance signals so that the externally-transmitted disturbance signals can not be transmitted or transmitted less to the outside. For a receiving energy converter, the effect of the self-damping plates is to reduce and even eliminate remained externally-transmitted disturbance signals and random disturbance signals so that the remained externally-transmitted disturbance signals and the random disturbance signals can not be transmitted or less transmitted to a receiving vibration sub-assembly.
Description
Technical field
The utility model is the housing that ultrasonic transducer is used, particularly to the improvement of its structure.
Background technology
Present (gas) ultrasonic flow meter, the parts of most critical are ultrasonic transducer.Its concrete working condition is, when ticker under activation voltage, do the porpoise campaign, and produce useful signal forward and produce unofficial biography undesired signal (also claiming unwanted signals) backward.This unwanted signals can pass to the coupled transmitting transducer shell that connects, and is delivered on the measuring tube, and then is delivered on another corresponding receiving transducer shell with measuring tube, is delivered to receive on the ticker assembly again.
The speed that acoustic wave energy is propagated in gas is approximately 300～600m/s, and the speed of in metal, propagating is approximately 3000～6000m/s.Useful signal V
oTravel path be the air line distance L between transmitting transducer and the receiving transducer
1, its by way of medium be the tested gas in the measuring tube; Unofficial biography undesired signal V
1Travel path be the distance L that metal connects between transmitting transducer and the receiving transducer
2(be approximately 2 times L
1) its by way of medium be metal.So at useful signal V
oWhen arriving receiving transducer P002, unofficial biography undesired signal V
1Reach receiving transducer already, and caused the vibration that receives the ticker assembly in the receiving transducer; Acoustic wave energy attenuation rate in gas decays with how much multiples simultaneously, and the attenuation rate of acoustic wave energy in metal decays with arithmetic value.That is to say that unwanted signals (unofficial biography undesired signal) not only arrives than useful signal is early, and signal intensity also wants big many.
In addition, pipeline receives extraneous percussion vibration etc. to pass undesired signal in can causing at random, and therefore also being added on the receiving transducer at random in the signal after useful signal and unofficial biography undesired signal, interior biography undesired signal are synthesized, will be difficult to recognize useful signal simultaneously.
At present, the main method that solves unofficial biography undesired signal and interior biography undesired signal is, in the housing of transducer, and the rubber lining of filling cyath vin type.This wineglass type rubber lining is a kind of absorbing material.The ultrasonic transducer housing of this structure; Can reduce on the one hand passing undesired signal in the unofficial biography undesired signal, but simultaneously also can the vibrational energy of absorbed oscillation sub-component when vibration, vibrating effect reduced; Reduce the intensity of useful signal, and then caused the accuracy rate of measurement data to reduce.
The utility model content
In view of the shortcoming that above-mentioned prior art exists, the utility model provides a kind of improved ultrasonic transducer shell structure.
A kind of ultrasonic transducer shell structure, housing are right cylinder, and two ends are the open end of indent, and are provided with center pit, it is characterized in that, housing is the step right cylinder; At the middle part of housing, be provided with at least one group of self-damping plate, self-damping plate and shell process for the same material one; Gapped between the housing of self-damping plate and its both sides.
The utility model is to adopt a kind of and the method for transducer enclosure with the self-damping plate of material one processing, solves V
1(unofficial biography undesired signal) and V
2 (The interior undesired signal that passes) problem.
The principle of work of the utility model: transducer is under the emission situation, and the ticker assembly is done the porpoise campaign under activation voltage, and produces useful signal forward and produce unwanted signals (unofficial biography undesired signal) backward.Owing to do not have the absorbing material on every side,, inject (gas or liquid) in the measured medium so its useful signal forward can not be absorbed, but all launches; Behind measured medium, arrive in the transducer of the other end; Meanwhile, when doing the porpoise campaign, produce unwanted signals (unofficial biography undesired signal) backward simultaneously owing to emission ticker assembly; This signal is when the self-damping plate of transducer enclosure, and its acoustic wave energy will make the self-damping plate vibrate (swing), this vibration (swing) motion; Energy with lot of consumption (absorption) unofficial biography undesired signal; Produce the weakening effect, thereby reach minimizing, even eliminate the purpose of unofficial biography undesired signal.
Simultaneously, when the random disturbance signal that caused by extraneous percussion vibration etc. when pipeline passed undesired signal promptly, this random disturbance signal also will be along the inverse path of unofficial biography undesired signal, through the self-damping plate arrival ticker assembly of transducer enclosure.In like manner, interior biography undesired signal also will have only the ticker assembly in the arrival transducer seldom by lot of consumption (absorption) in the self-damping plate.
For transmitting transducer, the effect of its self-damping plate is to reduce, even eliminates the unofficial biography undesired signal, make it and can not propagate or blaze abroad less,
For receiving transducer, the effect of its self-damping plate is to reduce, even eliminates remaining unofficial biography undesired signal and random disturbance signal, makes it to propagate or propagate into less to receive on the ticker assembly.
The weakening effect of self-damping plate is relevant with following factors:
1: the sheet number of self-damping plate is many more; Unofficial biography undesired signal of its consumption (absorption) and interior biography undesired signal energy are just many more, and the weakening effect is just good more, but too many sheet number; Though weakening is effective; But its processing and cost are again new problems, and through a large amount of experiment and calculating, the sheet number of self-damping plate gets final product with 2 to 3.
2: the inside and outside footpath ratio=d/D of self-damping plate, the d/D value is more little, the weakening effect is just good more, too little difficult processing, and rupturing easily, thus with between d/D=0.3～0.4 for well.
3, the radius-thickness ratio=d/h of self-damping plate, the d/h value is big more, the weakening effect is just good more, but is difficult for processing too greatly, and ruptures easily, thus with between d/h=3～4 for well.
4, the shape of self-damping plate can have multiplely, and promptly the profile of self-damping plate is a disc, or the both side surface of self-damping plate is corrugated, or the both sides of self-damping plate are concave shape.
Description of drawings
Accompanying drawing 1 is the utility model structural representation.
Accompanying drawing 2 is dull and stereotyped self-damping plate structure synoptic diagram.
Accompanying drawing 3 is corrugated self-damping plate structure synoptic diagram.
Accompanying drawing 4 is concave shape self-damping plate structure synoptic diagram.
Accompanying drawing 5 is A-A section left views of Fig. 2.
Accompanying drawing 6 is that the utility model is at ultrasonic transducer user mode structural representation.
1 housing, 2 self-damping plates, 21 dull and stereotyped self-damping plates, 22 corrugated self-damping plates, 23 concave shape self-damping plates, 3 ultrasonic transducers.
Embodiment
Embodiment 1
A kind of ultrasonic transducer shell structure, housing are right cylinder, and two ends are the open end of indent, and are provided with center pit; Housing is the step right cylinder; At the middle part of housing, be provided with 2 groups of self-damping plates, self-damping plate and shell process for the same material one; Gapped between the housing of self-damping plate and its both sides.The self-damping plate adopts dull and stereotyped self-damping plate, and promptly the profile of self-damping plate is a disc.
The inner diameter d of self-damping plate and the ratio=d/D=0.3 of D outer diameter～0.4; Radius-thickness ratio=d/h=3 of the inner diameter d of self-damping plate and thickness of slab h～4; Gap delta between the self-damping plate is 3 times of thickness of slab h.
Embodiment 2
A kind of ultrasonic transducer shell structure adopts corrugated self-damping plate, and promptly the both side surface of self-damping plate is corrugated, described corrugated self-damping plate, and ripple is than h/H1=1.5～2; Ripple ratio is N/(D-d);
D is the internal diameter of damping sheet;
D is the external diameter of damping sheet;
H is corrugated self-damping plate thickness;
H1 is plate thickness and both sides ripple thickness sum;
N is the ripple number.
Ripple can increase the absorption of acoustic wave energy, thereby improves the ability that stops the acoustic wave energy unofficial biography and improve the ability that passes in the undesired signal that stops.
Other structures are with embodiment 1.
A kind of ultrasonic transducer shell structure adopts concave shape self-damping plate, and promptly the both sides of self-damping plate are concave shape.
Radius-of-curvature ρ=50～200 of described concave shape self-damping plate concave surface.To increase the absorption of acoustic wave energy, stop the ability that passes in the undesired signal thereby improve the ability and the raising that stop the acoustic wave energy unofficial biography
Other structures are with embodiment 1.
Claims (5)
1. ultrasonic transducer shell structure, housing is a right cylinder, and two ends are the open end of indent, and are provided with center pit, it is characterized in that, and housing is the step right cylinder; At the middle part of housing, be provided with at least one group of self-damping plate, self-damping plate and shell process for the same material one; Gapped between the housing of self-damping plate and its both sides.
2. according to the described ultrasonic transducer shell structure of claim 1, it is characterized in that the self-damping plate is 2～3 groups; The profile of self-damping plate is a disc, or the both side surface of self-damping plate is corrugated, or the both sides of self-damping plate are concave shape.
3.
According to claim 1 or 2 described ultrasonic transducer shell structures, it is characterized in that the inner diameter d of self-damping plate and the ratio=d/D=0.3 of D outer diameter～0.4; Radius-thickness ratio=d/h=3 of the inner diameter d of self-damping plate and thickness of slab h～4; Self-damping sheet separation δ is 3 times of thickness of slab h.
4.
According to the described ultrasonic transducer shell structure of claim 3, it is characterized in that, described corrugated self-damping plate, ripple is than h/H1=1.5～2; Ripple ratio N/(D-d);
D is the internal diameter of damping sheet;
D is the external diameter of damping sheet;
H is corrugated self-damping plate thickness;
H1 is plate thickness and both sides ripple thickness sum;
N is the ripple number.
5. according to the described ultrasonic transducer shell structure of claim 3, it is characterized in that radius-of-curvature ρ=50～200 of described concave shape self-damping plate concave surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202507879U CN202221323U (en) | 2011-07-15 | 2011-07-15 | Casing structure of ultrasonic energy converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202507879U CN202221323U (en) | 2011-07-15 | 2011-07-15 | Casing structure of ultrasonic energy converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202221323U true CN202221323U (en) | 2012-05-16 |
Family
ID=46043347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202507879U Expired - Fee Related CN202221323U (en) | 2011-07-15 | 2011-07-15 | Casing structure of ultrasonic energy converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202221323U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879044A (en) * | 2011-07-15 | 2013-01-16 | 上海一诺仪表有限公司 | Housing structure of ultrasonic transducer |
| CN104703545A (en) * | 2012-10-02 | 2015-06-10 | 皇家飞利浦有限公司 | Tool for opening and closing a transducer housing |
-
2011
- 2011-07-15 CN CN2011202507879U patent/CN202221323U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879044A (en) * | 2011-07-15 | 2013-01-16 | 上海一诺仪表有限公司 | Housing structure of ultrasonic transducer |
| CN104703545A (en) * | 2012-10-02 | 2015-06-10 | 皇家飞利浦有限公司 | Tool for opening and closing a transducer housing |
| CN104703545B (en) * | 2012-10-02 | 2017-06-20 | 皇家飞利浦有限公司 | Instrument for opening and closing transducer housing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120516 Termination date: 20190715 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |