CN1797677A - Structure of magnetic yoke in magnetron - Google Patents
Structure of magnetic yoke in magnetron Download PDFInfo
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- CN1797677A CN1797677A CN 200410094043 CN200410094043A CN1797677A CN 1797677 A CN1797677 A CN 1797677A CN 200410094043 CN200410094043 CN 200410094043 CN 200410094043 A CN200410094043 A CN 200410094043A CN 1797677 A CN1797677 A CN 1797677A
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- yoke
- magnetron
- magnetic yoke
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Abstract
An interconnecting piece of the upper magnetic yoke is connected to an interconnecting piece of the lower magnetic yoke each other so as to form magnetic yoke. Upper magnet and lower magnet are installed inside the magnetic yoke. Under action of the upper magnet and lower magnet, magnetic field is formed inside the upper magnetic yoke and the lower magnetic yoke. A fixed part is formed on the interconnecting pieces of the upper magnetic yoke and the lower magnetic yoke in order to fixing magnetron. The invention ensures that not contacted part between the interconnecting piece of the upper magnetic yoke and the interconnecting piece of the lower magnetic yoke will not be occurred so that the disclosed magnetron forms strong magnetic field and increscent output.
Description
Technical field
The present invention relates to a kind of structure of magnetic yoke of magnetron.
Background technology
As everyone knows, magnetron is a kind of being installed in the equipment such as microwave oven or lighting apparatus, electric energy can be changed into the device of the such high-frequency energy of microwave.
As shown in Figure 1, 2, yoke (1) is formed by connecting by top yoke (1a) and bottom yoke (1b), roughly be " mouth " font, the anodal barrel (cylinder) (2) of drum is equipped with in the inside of this yoke (1), the inside of this anodal barrel (2) has several blades (vane) (3) to be radial arrangement towards axis direction, these blades (3) have formed common resonator, therefore can motivate radio-frequency component.The front end of above-mentioned blade (3) is connecting inboard grading ring (4) and outside grading ring (5) respectively, this inboard grading ring (4) and outside grading ring (5) can be respectively replacing with the upper and lower part of above-mentioned blade (3) to be realized continuing, and this anodal barrel (2) and blade (3) have just been formed anode portion (ANODE).
In addition, be equipped with on the central shaft of above-mentioned anodal barrel (2) and be wound in spiral-shaped filament (filament) (7), at a distance of certain interval, thereby formed certain action space (6) between the front end of this filament (7) and blade (3).This filament (7) is made by the mixture of tungsten and thorium oxide, and it has constituted negative pole part (CATHODE), can be heated under the effect of drive current, thereby discharge hot electron.
In addition, upper seal (top sealed) (8) is equipped with in the upper end of above-mentioned filament (7), and it can prevent that the hot electron that discharges from radiating upward; Lower seal (end sealed) (9) is equipped with in the lower end of above-mentioned filament (7), and it can prevent that the hot electron that discharges from radiating downwards.Be formed centrally through hole in the above-mentioned lower seal (9), the sensor conductor (sensor lead) (10) that useful Mo is made in the through hole inserts wherein, and the sensor lead (10) is fixedly connected on the bottom surface of upper seal (8).The upper end that side lead (sidelead) (11) is arranged that the bottom surface of lower seal (9) is provided with is in the above fixedly connected, and this side lead (11) and the sensor lead (10) are also made with Mo at a distance of certain interval.
In addition, the upper and lower opening of above-mentioned anodal barrel (2) is connecting with magnetic material on partly and is making, is being funnel shaped upper magnetic pole (13) and bottom magnetic pole (14); The lower end of the upper end of above-mentioned upper magnetic pole (13) and bottom magnetic pole (14) is being connected the A-capping (15) and the F-capping (16) of drum respectively by method for brazing (brazing); The upper end of above-mentioned A-capping (15) is connecting the A-ceramic body (ceramic) (17) that is used for to the outside output higher-order of oscillation by method for brazing, and the lower end of above-mentioned F-capping (16) is connecting by method for brazing and is used for heat insulation F-ceramic body (ceramic) (18).The upper end of above-mentioned A-ceramic body (17) is connecting blast pipe (19) by method for brazing, and for the inner sealing with above-mentioned anodal barrel (2) becomes vacuum state, and the upper end of above-mentioned blast pipe (19) is blocked and involution.
In addition, antenna (antenna) (20) is equipped with in the inside of above-mentioned A-capping (15), and this antenna (20) is used for exporting the higher-order of oscillation that is produced in the common resonator.Continue on blade (3) in the lower end of this antenna (20), the upper end then is fixed on the inside top of above-mentioned blast pipe (19).
In addition, the above and below of above-mentioned anodal barrel (2) is connecting upper magnet (21) and bottom magnet (22) respectively, and above-mentioned upper magnet (21) and bottom magnet (22) contact with the inner surface of yoke (1), so they can form magnetic field with upper and lower part magnetic pole (13) (14).
In addition, the below of above-mentioned yoke (1) is connecting the filter hut (filterbox) (26) that is box (box) shape, a pair of choke (choke coil) (27) is equipped with in the inside of this filter hut (26), and this a pair of choke (27) can make high-frequency noise (noise) decay to the input part adverse current.In addition, an end of above-mentioned a pair of choke (27) keeps being electrically connected with the lower end of a pair of F-lead (28), and wherein this a pair of F-lead (28) can insert and be connected in the last through hole that forms of above-mentioned F-ceramic body (18).
The upper end that insertion is connected to the F-lead (28) in the through hole of above-mentioned F-ceramic body (18) is connected on the bottom surface of pair of discs (disk) (29), this pair of discs (29) is installed in the top of F-ceramic body (18), and the top of above-mentioned pair of discs (29) connects the lower end of the sensor lead (10) and side lead (11) respectively.
Capacitor (capacitor) (31) is housed on the sidewall of above-mentioned filter hut (26), the inside end of above-mentioned capacitor (31) keeps being electrically connected with above-mentioned choke (27), inserting FERRITE CORE (ferrite) (32) in this choke (27) along its length, this FERRITE CORE (32) is used for absorbing low-frequency noise.
Cooling fin (41) is housed between the outer surface of the inner surface of above-mentioned yoke (1) and anodal barrel (2), and the radome (antenna cap) (42) of the involution portion that is used for protecting blast pipe (19) is equipped with in the top of above-mentioned A-ceramic body (17).
As shown in Figure 3, the two ends bending vertically downward of the top yoke (1a) of above-mentioned yoke (1), thereby formed top yoke connecting portion (1a '), the outer surface of this top yoke connecting portion (1a ') and the bottom yoke connecting portion of bottom yoke (1b) upper end (1b ') are close to and are linked together.In addition, the definite part of this top yoke connecting portion (1a ') is through processing and formed the fixed part (61) that is used for fixing magnetron.
Common magnetron with said structure is work like this, at first external power source can be switched to sensor conductor (10) and side lead (11) by F lead (28), thereby form the closed-circuit that constitutes by F-lead (28), sensor conductor (10), filament (7), upper seal (9), lower seal (9), side lead (11), disk (29), drive current is switched on the filament (7).Under the effect of the drive current of connecting like this, filament (7) can be heated, thereby discharges hot electron, and these hot electrons that discharge form electronic population.
In addition, under the effect of the driving voltage that is switched to anode portion by side lead (11), can produce highfield in the action space (6), the magnetic flux (flux) that is produced by upper magnet (21) and bottom magnet (22) is drawn towards action space (6) along bottom magnetic pole (14), pass action space (6) then and stretch to upper magnetic pole (13), thereby in action space (6), form high-intensity magnetic field.
Be discharged under the effect of the highfield of hot electron in action space (6) in the action space (6) from filament (7) surface of high temperature, can flow to blade (3), and in the process of advancing, meeting is under the effect of the vertical of high-intensity magnetic field, the shape of spinning motion arrives blade (3) at last.
The electronic population that forms by electronic motion can produce blade (3) with inverse/one's of the multiple of higher-order of oscillation frequency cycle and disturb like this, under the effect of this interference, space between the relative blade of direction (3) is just to have electric capacity (capacitance) composition in the resonator and inductance (inductance) composition constitutes antiresonant circuit on circuit, wherein above-mentioned capacitive component refers to the capacitive component that acts on the static capacity between the blade (3), and the inductance composition refers to the inductance composition that is made of relative blade of above-mentioned direction (3) and anodal barrel (2) that blade is coupled together.So, will motivate the higher-order of oscillation, and the resonance frequency of the higher-order of oscillation by following formula promptly from blade (3)
Draw.The higher-order of oscillation that motivates like this can pass through antenna (20) to external emission, thereby makes the hydrone per second in the food produce 2,400,000,000 5 thousand ten thousand vibrations, so, just can come cooking food by the frictional heat that the hydrone vibration is produced.
When producing high-frequency energy by the way, the filter hut (26) below the electromagnetic wave noise that input part leaks can be installed in yoke (1) cuts off, and so just can prevent that these electromagnetic wave noises are to external leaks; Packing ring (gasket) (51) outside the electromagnetic wave noise that efferent leaks then can be installed in A-capping upper end cuts off.
In having the existing magnetron of said structure,, need certain position of the top yoke connecting portion of top yoke (1a) (1a ') be processed, thereby be formed for the fixedly fixed part of magnetron (61) for fixing magnetron.If but the formation on this top yoke connecting portion (1a ') position of fixed part (61) can not touch on the bottom yoke connecting portion (1b '), when driven by magnetron, magnetic field is died down so, output reduces.This is the existing in prior technology problem just.
Summary of the invention
In order to overcome the above-mentioned shortcoming that prior art exists, the invention provides a kind of structure of magnetic yoke of magnetron, its advantage is to make the position that can not occur not reaching between top yoke connecting portion and the bottom yoke connecting portion, therefore can form high-intensity magnetic field, thereby increases output.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of structure of magnetic yoke of magnetron, it is characterized in that: this magnetron has following structure, be that the top yoke connecting portion of top yoke and the bottom yoke connecting portion of bottom yoke interconnect, thereby formation yoke, in such yoke inside upper magnet and bottom magnet are housed, under the effect of this upper magnet and bottom magnet, can in above-mentioned top yoke and bottom yoke, form magnetic field; In this magnetron, on the yoke connecting portion of the bottom of above-mentioned bottom yoke, formed the fixed part that is used for fixing magnetron.
The structure of magnetic yoke of aforesaid magnetron, wherein fixed part is that upper end from bottom yoke connecting portion forms towards the horizontal direction bending.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the end view of existing magnetron structure
Fig. 2 is the longitdinal cross-section diagram of magnetron shown in Figure 1
Fig. 3 is the enlarged diagram of A part shown in Figure 2
Fig. 4 is the longitdinal cross-section diagram of the magnetron of structure of magnetic yoke of the present invention
Fig. 5 is the enlarged diagram of B part shown in Figure 4
The number in the figure explanation:
1: yoke (yoke) 1a: top yoke
1a ': top yoke connecting portion 1b: bottom yoke
1b ': bottom yoke connecting portion 100: fixed part
Embodiment
Therefore shown in Fig. 4,5, the basic structure of the magnetron among the present invention and act on same as the prior artly for these identical parts, adopts identical label here, and omits the detailed description to these parts.
In the present invention, yoke (1) is formed by connecting by top yoke (1a) and bottom yoke (1b), roughly is " mouth " shape.That is to say, the bottom yoke connecting portion that the top yoke connecting portion that forms at the two ends of above-mentioned yoke (1a) (1a ') and upper end in bottom yoke (1b) form (1b ') links together, and has formed the outstanding fixed part (100) that is used for fixing magnetron on this bottom yoke connecting portion (1b ').
Said fixing portion (100) forms on the upper part, both sides of above-mentioned bottom yoke connecting portion (1b '), forms towards the horizontal direction bending.
If adopt the structure of magnetic yoke of magnetron of the present invention with said structure, so under the effect that is installed in the magnetic force that inner upper magnet (21) of yoke (1) and bottom magnet (22) produced, anodal barrel (2) can be with last, bottom magnetic pole (13) (14) forms magnetic field together, and in this case, connecting portion can keep comprehensive engagement between the bottom yoke downlink connection portion of (1a ') and bottom yoke (1b) because the top yoke connecting portion of top yoke (1a) (1b '), therefore can produce very strong magnetic field, thereby improve the output of magnetron.
The present invention has following effect:
As mentioned above, because the structure of magnetic yoke of magnetron of the present invention is to connect in the top yoke by the top yoke The bottom yoke connecting portion that connects section and bottom yoke interconnects in the yoke that forms, and connects in the bottom yoke Formed the fixed part that is used for fixing magnetron in the section, therefore can make top yoke connecting portion and bottom magnetic Connecting portion between the yoke connecting portion keeps comprehensive engagement, thereby can produce very strong when making driven by magnetron Magnetic field, and then the output that improves magnetron.
Claims (2)
1, a kind of structure of magnetic yoke of magnetron, it is characterized in that: this magnetron has following structure, be that the top yoke connecting portion of top yoke and the bottom yoke connecting portion of bottom yoke interconnect, thereby formation yoke, in such yoke inside upper magnet and bottom magnet are housed, under the effect of this upper magnet and bottom magnet, can in above-mentioned top yoke and bottom yoke, form magnetic field; In this magnetron, on the yoke connecting portion of the bottom of above-mentioned bottom yoke, formed the fixed part that is used for fixing magnetron.
2, the structure of magnetic yoke of magnetron according to claim 1 is characterized in that said fixing portion is that upper end from bottom yoke connecting portion forms towards the horizontal direction bending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410094043 CN1797677A (en) | 2004-12-27 | 2004-12-27 | Structure of magnetic yoke in magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410094043 CN1797677A (en) | 2004-12-27 | 2004-12-27 | Structure of magnetic yoke in magnetron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1797677A true CN1797677A (en) | 2006-07-05 |
Family
ID=36818624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410094043 Pending CN1797677A (en) | 2004-12-27 | 2004-12-27 | Structure of magnetic yoke in magnetron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1797677A (en) |
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2004
- 2004-12-27 CN CN 200410094043 patent/CN1797677A/en active Pending
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| WD01 | Invention patent application deemed withdrawn after publication |