CN202270640U - Coil assembly for giant magnetostictive power ultrasonic transducer - Google Patents
Coil assembly for giant magnetostictive power ultrasonic transducer Download PDFInfo
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- CN202270640U CN202270640U CN 201120297487 CN201120297487U CN202270640U CN 202270640 U CN202270640 U CN 202270640U CN 201120297487 CN201120297487 CN 201120297487 CN 201120297487 U CN201120297487 U CN 201120297487U CN 202270640 U CN202270640 U CN 202270640U
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- ultrasonic transducer
- power ultrasonic
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Abstract
The utility model discloses a coil assembly for a giant magnetostictive power ultrasonic transducer, which is mainly composed of an upper end face, a lower end face, an upper magnetism gathering sheet, a lower magnetism gathering sheet, a mandrel part and a flux sleeve. The mandrel part is a cylindrical body, and the mandrel part, the upper end face and the lower end face fixedly form a coil framework. A coil is wound outside the mandrel part, and a giant magnetostictive rod is arranged in a middle hole of the mandrel part. The upper end face and the lower end face are respectively formed by a plurality of silicon-steel plates in stack-up mode, and an insulation groove is arranged on each silicon-steel plate in the radial direction. The upper magnetism gathering sheet and the lower magnetism gathering sheet are respectively arranged at the upper end and the lower end of the giant magnetostictive rod, and the flux sleeve is fixed between the upper end face and the lower end face. The silicon-steel plates are adopted to manufacture main magnetism conduction components of coils, the thickness of the silicon-steel plates is small, insulation layers are coated on the surfaces of the silicon-steel plates, and the insulation groove is further arranged on each silicon-steel plate during processing, so that vortex can be completely avoided, and damage and heating are reduced. Simultaneously, the magnetism conduction components composed of the silicon-steel plates further have the advantages of being strong in magnetism conduction performance, high in mechanical strength, convenient to process, low in cost and the like.
Description
Technical field
The utility model relates to a kind of technical field of power ultrasonic, refers to a kind of ultra-magnetic telescopic power ultrasonic transducer coil block especially.
Background technology
Power ultrasonic is widely used in each engineering field.Compare with traditional power ultrasonic transducer driving material; Giant magnetostrictive material has that flexible strain is big, energy density is big, response speed is fast and characteristics such as operating voltage is low; Can overcome transducer power and do little problem, beginning is applied in power ultrasonic transducer.Drive coil is the vitals in the ultra-magnetic telescopic power ultrasonic transducer, and it produces alternating magnetic fields, drives the elongation and the shortening of giant magnetostrictive material, thereby produces ultrasonic vibration.But, be easy to generate eddy current under high-frequency magnetic field because transducer is worked; Simultaneously, it is very big that eddy current, magnetic hysteresis equal loss add heating together, and giant magnetostrictive material is very sensitive to temperature.So the design of coil block is except must producing necessary magnetic field, one will consider to reduce as far as possible eddy current, reduces the generation of eddy-current loss heat, and two will let the heat that produces distribute as early as possible, in order to avoid cause excessive temperature rise.
U.S. Pat 6624539 also relates to a kind of ultra-magnetic telescopic power ultrasonic transducer, and this patent is in order to solve eddy current problem, and the main magnetic conductive component of coil rack adopts the powder metallurgy permeability magnetic material to constitute; It is strong that this type material has the magnetic conduction ability, and the characteristics that eddy current is little can reduce the generation of eddy-current loss heat; But its complicate fabrication process must spend a lot of money to make special mould earlier, and cost is very high; And powdered metallurgical material is more crisp, and mechanical performance is relatively poor.
The utility model content
The utility model technical problem to be solved is to provide a kind of ultra-magnetic telescopic power ultrasonic transducer coil block, and it can produce powerful on request and uniform magnetic field can be reduced eddy current again, reduces heating, the control temperature.
For solving the problems of the technologies described above, the technical solution of the utility model is:
A kind of ultra-magnetic telescopic power ultrasonic transducer coil block, mainly by upper surface, lower surface, on gather magnetic sheet, gather magnetic sheet, core component and flux sleeve down and constitute; This core component is a cylindrical body, and itself and the fixing coil rack that forms of upper and lower end face are wound with coil outside core component, in core component's interstitial hole, be placed with giant magnetostrictive rod; Said upper and lower end face is built up by some silicon steel sheets, on every silicon steel sheet, radially offers an insulation tank; Saidly gather the two ends up and down that magnetic sheet is arranged at giant magnetostrictive rod up and down; Said flux sleeve is fixed between the above-mentioned upper and lower end face.
Each silicon steel sheet of said upper and lower end face is in the insulation tank placement of staggering of each sheet of when stack.
Said flux sleeve is rolled into several layers by the silicon steel sheet of rectangle and is cylindric.
The interior of said core component is provided with cooling water channel, and the below is provided with two water pipes that are used for the cooling water turnover.
Described core component is combined by interior cover and overcoat, forms cooling water channel between the two, and the cooling water channel below is provided with two water pipes that are used for the cooling water turnover.
Cover is by magnetic conduction not, the non-conductive but made of heat conduction in described.
Cover is processed by boron nitride or silicon nitride in said.
Said overcoat adopts not magnetic conduction, non-conductive also athermanous made.
Said overcoat is processed by ABS engineering plastics or nylon.
Between the cooling water channel in said between the overcoat dividing plate is set also.
The axial length of said coil is longer than giant magnetostrictive rod.
Described flux sleeve is made up of some magnetic conduction bars, and each magnetic conduction bar is cylindric through insulating cement is bonding again.
The magnetic conduction bar is processed by electrical pure iron.
After adopting such scheme, because the utility model adopts silicon steel sheet to make main magnetic conductive component, silicon steel sheet thickness is very little; The surface scribbles insulating barrier again; On each sheet silicon steel sheet, radially open insulation tank in the processing again, can prevent eddy current fully, reduced eddy-current loss and heating; Characteristics such as simultaneously, the magnetic conductive component of being made up of silicon steel sheet also has the magnetic conduction ability strong, and mechanical strength is high, and is easy to process, and cost is low.
In addition, the utility model is provided with cooling water channel again in core component, the non-conductive but boron nitride manufacturing of heat conduction by magnetic conduction not of interior cover; Thereby; The magnetic hystersis loss of the giant magnetostrictive rod heating water that can be cooled is rapidly taken away, and simultaneously, has blocked the heating from coil by the overcoat of the not non-conductive athermanous engineering plastics manufacturing of magnetic conduction; Avoid it that giant magnetostrictive rod is exerted an influence, so just guaranteed that giant magnetostrictive rod can work under the temperature that is fit to.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the wherein structural representation of a slice silicon steel sheet of the said lower surface of the utility model;
Fig. 3 A is the cutaway view of the said core component of the utility model along axis;
Fig. 3 B is the sectional view of the said core component of the utility model perpendicular to axis;
Fig. 4 is the sketch map of the utility model energising back magnetic line of force trend;
Fig. 5 A, Fig. 5 B are the structural representations of said another embodiment of flux sleeve of the utility model.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further to detail.
What the utility model disclosed is a kind of ultra-magnetic telescopic power ultrasonic transducer coil block, as shown in Figure 1, is the preferred embodiment of the utility model.Described coil block mainly by upper surface 1, lower surface 7, on gather magnetic sheet 4, gather magnetic sheet 9, core component 3 and flux sleeve 6 down and constitute; This core component 3 is a cylindrical body; Itself and upper and lower end face 1, can be between 7 through the bolt 8 fixing coil racks that form; Outside core component 3, be wound with coil 2, in core component's 3 interstitial holes, be placed with giant magnetostrictive rod 5.
Described upper and lower end face 1,7 is built up by some silicon steel sheets; The thickness of every silicon steel sheet can be about 0.3mm; Also can be 0.2,0.23,0.27,0.3,0.35 or plurality of specifications such as 0.5mm, this silicon steel sheet can be processed into shape shown in Figure 2 (Fig. 2 explains with wherein a slice silicon steel sheet of lower surface 7), on silicon steel sheet, radially offers an insulation tank 71; This insulation tank 71 is generally formed by the line cutting processing, and its width is generally about 0.2mm.Be provided with insulation tank and can prevent along the circumferential direction to produce eddy current.Each silicon steel sheet is when stack, and the insulation tank with each sheet staggers as far as possible, in order to avoid weaken the intensity of upper and lower end face.Also can have corresponding hole (like stud bolt hole 72 and water pipe hole 73) on each silicon steel sheet, be used for fixing bolt 8 and wear the cooling water pipe in the following core component 3.The shape of said upper surface 1 is similar with lower surface 7, also offers insulation tank and corresponding hole (stud bolt hole is only arranged usually), will not illustrate.After adopting stacked some silicon steel sheets to constitute the upper and lower end face, can prevent the eddy current of end surface thickness direction, can prevent eddy current along the circumferential direction again after being provided with insulation tank, therefore above-mentioned measure can guarantee that the eddy current on the end face eliminates basically.
The described upper and lower magnetic sheet 4,9 that gathers is arranged at giant magnetostrictive rod about in the of 5 two ends, and it is used to collect the magnetic line of force, and homogenizing is through the magnetic field of giant magnetostrictive rod, this is upper and lower gather magnetic sheet 4,9 can be by permeability magnetic material manufacturings such as electrical pure irons.
The structure of said core component 3 is shown in Fig. 3 A and Fig. 3 B, and it is a cylindrical body, and its interior can be provided with cooling water channel 31, and the below is provided with the turnover that two water pipes 32 are used for cooling water.Described core component 3 can be combined by interior cover 33 and overcoat 34, forms between the two to stick with glue the bonding and sealing of agent between described cooling water channel 31, two members, guarantees water-tight.In addition, cover 33 can be by magnetic conduction not, the non-conductive but made of heat conduction, for example: boron nitride, silicon nitride etc. in described; Adopt this material neither can produce eddy current, can not influence Distribution of Magnetic Field again, can also take away the magnetic hystersis loss heat that giant magnetostrictive rod 5 produces; Simultaneously, boron nitride has lubrication, and it directly contacts with giant magnetostrictive rod 5; Can on contact surface, form and lubricate, reduce friction.Described overcoat 34 can adopt not magnetic conduction, non-conductive also athermanous made; For example ABS engineering plastics or Other Engineering plastics (like nylon etc.); This overcoat 34 both provided supporting role for coil; Also, blocked heating, avoided this heat that giant magnetostrictive rod 5 is exerted an influence from coil by means of its bad thermal conductivity.Between the overcoat 33, the cooling water channel between 34 31 dividing plate 35 can also be set in said, this dividing plate 35 with two water pipes 32 (being the cooling water intake-outlet) separately, and this dividing plate 35 also available material such as the ABS engineering plastics manufacturing the same with overcoat 34.
Described flux sleeve 6 is rolled into several layers by the silicon steel sheet of rectangle and is cylindric, is fixed on said upper and lower end face 1, between 7, constitutes external magnetic circuit, and the flux sleeve that adopts silicon steel sheet to process also can prevent eddy current.This flux sleeve 6 also can adopt other permeability magnetic materials to process, for example: powder metallurgy permeability magnetic material or the like.Shown in Fig. 5 A and Fig. 5 B, described flux sleeve 6 ＇ also can be made up of some magnetic conduction bar 61 ＇ for another example, and each magnetic conduction bar 61 ＇ is cylindric through insulating cement 62 ＇ are bonding again, and this magnetic conduction bar 61 ＇ can be processed by electrical pure iron.During actual fabrication, available electrical pure iron is made whole flux sleeve, vertically is cut into the magnetic conduction bar of thickness 2 millimeter then along radius, uses bonding time global shape of insulating cement at last.
In addition, be in uniform high-intensity magnetic field in order to make giant magnetostrictive rod 5 as much as possible, it is long slightly that the axial length of said coil 2 cans be compared to giant magnetostrictive rod 5 most.Theoretic saying, the length of coil is than long many more of giant magnetostrictive rod, and magnetic field is even more, but because the restriction in space, the axial height of coil can not be too big, and general two is than giant magnetostrictive rod 5 each long 5 millimeter.
Lead is wrapped in regularly on the overcoat 34 of core component 3, promptly forms drive coil 2.When feeding electric current in the coil 2, around coil, form magnetic field, the upper surface 1 of coil, lower surface 7, on gather magnetic sheet 4, gather magnetic sheet 9, flux sleeve 6 and giant magnetostrictive rod 5 down and constitute closed magnetic paths; It is as shown in Figure 4 that the magnetic line of force moves towards, and through the magnetic line of force of giant magnetostrictive rod 5 not only evenly but also intensive, magnetic field intensity has reached Expected Results; Simultaneously; Because said upper and lower end face 1,7, flux sleeve 6 have prevented the generation of eddy current by the silicon steel sheet manufacturing, have reduced heating.During work; Feed cooling waters through water pipe 32, because cover 33 is by heat conductivility good material such as boron nitride manufacturing in the mandrel, the magnetic hystersis loss of the giant magnetostrictive rod 5 heating water that can be cooled is rapidly taken away; Simultaneously; Overcoat 34 by the engineering plastics manufacturing has blocked the heating from coil 2, avoid it that giant magnetostrictive rod 5 is exerted an influence, and has so just guaranteed that giant magnetostrictive rod 5 can work under the temperature that is fit to.
Theoretical Calculation and experiment measuring all show; The magnetic field intensity and the uniformity requirement of expection satisfied in the magnetic field that this coil block produces, and can also reduce vortex phenomenon widely simultaneously, reduces heat and produces; In time distribute heat makes the operating temperature of giant magnetostrictive rod remain on below 60 ℃.
Claims (10)
1. ultra-magnetic telescopic power ultrasonic transducer coil block is characterized in that: this coil block mainly by upper surface, lower surface, on gather magnetic sheet, gather magnetic sheet, core component and flux sleeve down and constitute; This core component is a cylindrical body, and itself and the fixing coil rack that forms of upper and lower end face are wound with coil outside core component, in core component's interstitial hole, be placed with giant magnetostrictive rod; Said upper and lower end face is built up by some silicon steel sheets, on every silicon steel sheet, radially offers an insulation tank; Saidly gather the two ends up and down that magnetic sheet is arranged at giant magnetostrictive rod up and down; Said flux sleeve is fixed between the above-mentioned upper and lower end face.
2. ultra-magnetic telescopic power ultrasonic transducer coil block according to claim 1 is characterized in that: each silicon steel sheet of said upper and lower end face is in the insulation tank placement of staggering of each sheet of when stack.
3. ultra-magnetic telescopic power ultrasonic transducer coil block according to claim 1 is characterized in that: said flux sleeve is rolled into several layers by the silicon steel sheet of rectangle and is cylindric.
4. ultra-magnetic telescopic power ultrasonic transducer coil block according to claim 1, it is characterized in that: the interior of said core component is provided with cooling water channel, and the below is provided with two water pipes that are used for the cooling water turnover.
5. ultra-magnetic telescopic power ultrasonic transducer coil block according to claim 1; It is characterized in that: described core component is combined by interior cover and overcoat; Form cooling water channel between the two, the cooling water channel below is provided with two water pipes that are used for the cooling water turnover.
6. ultra-magnetic telescopic power ultrasonic transducer coil block according to claim 5 is characterized in that: cover is by magnetic conduction not, the non-conductive but made of heat conduction in described.
7. ultra-magnetic telescopic power ultrasonic transducer coil block according to claim 5 is characterized in that: said overcoat adopts not magnetic conduction, non-conductive also athermanous made.
8. ultra-magnetic telescopic power ultrasonic transducer coil block according to claim 1, it is characterized in that: the axial length of said coil is longer than giant magnetostrictive rod.
9. ultra-magnetic telescopic power ultrasonic transducer coil block according to claim 1, described flux sleeve is made up of some magnetic conduction bars, and each magnetic conduction bar is cylindric through insulating cement is bonding again.
10. ultra-magnetic telescopic power ultrasonic transducer coil block according to claim 9 is characterized in that: said magnetic conduction bar is processed by electrical pure iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120297487 CN202270640U (en) | 2011-08-16 | 2011-08-16 | Coil assembly for giant magnetostictive power ultrasonic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120297487 CN202270640U (en) | 2011-08-16 | 2011-08-16 | Coil assembly for giant magnetostictive power ultrasonic transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202270640U true CN202270640U (en) | 2012-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120297487 Withdrawn - After Issue CN202270640U (en) | 2011-08-16 | 2011-08-16 | Coil assembly for giant magnetostictive power ultrasonic transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202270640U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102274823A (en) * | 2011-08-16 | 2011-12-14 | 厦门理工学院 | Coil component of giant magnetostrictive power ultrasonic transducer |
-
2011
- 2011-08-16 CN CN 201120297487 patent/CN202270640U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102274823A (en) * | 2011-08-16 | 2011-12-14 | 厦门理工学院 | Coil component of giant magnetostrictive power ultrasonic transducer |
| CN102274823B (en) * | 2011-08-16 | 2013-01-09 | 厦门理工学院 | Coil component of giant magnetostrictive power ultrasonic transducer |
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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 |
Granted publication date: 20120613 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |