CN1797673A - Structure of upper magnetic pole of magnetron - Google Patents
Structure of upper magnetic pole of magnetron Download PDFInfo
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- CN1797673A CN1797673A CN 200410094039 CN200410094039A CN1797673A CN 1797673 A CN1797673 A CN 1797673A CN 200410094039 CN200410094039 CN 200410094039 CN 200410094039 A CN200410094039 A CN 200410094039A CN 1797673 A CN1797673 A CN 1797673A
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Abstract
The structure of upper magnetic pole of a magnetron, the magnetron has following structures, namely the inside of the magnetic yoke is equipped with the positive pole cylinder, the inside of the positive pole cylinder is equipped with several blades arranged radially, the positive pole cylinder and blade form the positive pole part of the magnetron together; a filament is arranged on the central shaft of the anode cylinder, the filament is spaced from the front end of the blade at a certain interval and can release hot electrons, thereby forming the cathode part of the magnetron; the upper part of the anode cylinder is provided with an upper magnetic pole, the lower part of the anode cylinder is provided with a lower magnetic pole, and the upper part and the lower part of the upper magnetic pole and the lower magnetic pole are respectively provided with an upper magnet and a lower magnet, so that the upper magnet and the lower magnet can form a magnetic field; the magnetron further includes an antenna for outputting high-frequency oscillation, which passes through the upper magnetic pole, and an opening portion opened outward is formed in a certain portion of the upper magnetic pole so that the antenna can be inserted and the shaping operation of the inserted antenna can be facilitated.
Description
Technical field
The present invention relates to a kind of structure of upper magnetic pole 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 such yoke (1), the inside of above-mentioned 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, above-mentioned 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 above-mentioned like 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 above-mentioned filament (7) and blade (3).Above-mentioned 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 above-mentioned upper seal (8).Have the upper end of side lead (sidelead) (11) in the above fixedly connected on the bottom surface of above-mentioned lower seal (9), 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 some blades (3) in the lower end of above-mentioned 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 above-mentioned 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 above-mentioned 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 above-mentioned a pair of F-lead (28) can insert and be connected in above-mentioned F-ceramic body (18) is gone up the through hole that forms.
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), wherein above-mentioned pair of discs (29) is installed in the top of above-mentioned F-ceramic body (18), and the top of above-mentioned pair of discs (29) is connecting 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 the above-mentioned 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).
Symbol 51 is packing ring (gasket) among the unaccounted figure.
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 (8), 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 can form electronic population.
In addition, under the effect of the driving voltage that is switched to anode portion by side lead (11), can form highfield in the action space (6), the magnetic flux (flux) that is produced by upper magnet (21) and bottom magnet (22) can be drawn towards action space (6) along bottom magnetic pole (14), pass action space (6) then and move towards 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 (formula below illustrating) 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 relative blade of direction (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, filter hut (26) blocking-up below the electromagnetic wave noise that input part leaks can be installed in yoke (1) so just can prevent that these electromagnetic wave noises are to external leaks; Packing ring (gasket) (51) blocking-up outside the electromagnetic wave noise that efferent leaks then can be installed in A-capping (15) upper end.
In addition, as shown in Figure 3, formed the through hole (13a) that is used for inserting antenna (20) on certain position of above-mentioned upper magnetic pole (13).That is to say that antenna (20) needs to pass above-mentioned through hole (13a), therefore in assembling process, antenna (20) is inserted above-mentioned through hole (13a) afterwards, in order to make accurately typing of antenna (20), need to use typing anchor clamps (zig), so that antenna (20) inserts with about 57 ° angle.
But, in having the existing magnetron of said structure, in the process of (20) that fixes up an aerial wire, after antenna (20) being inserted in upper magnetic pole (13) is gone up the through hole (13a) that forms, for big line (20) is finally finalized the design, need to operate, therefore have unhandy problem by narrow and small through hole (13a).
Summary of the invention
In order to overcome the above-mentioned shortcoming that prior art exists, the invention provides a kind of structure of upper magnetic pole of magnetron, can make easier the carrying out of typing operation of antenna.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of structure of upper magnetic pole of magnetron, it is characterized in that: this magnetron has following structure, anodal barrel is equipped with in the inside that is yoke, and several blades that is radial arrangement are equipped with in the inside of anodal barrel, and this anodal barrel and blade have constituted the anode portion of magnetron together; On the central shaft of above-mentioned anodal barrel filament is housed, the front end of this filament and blade can discharge hot electron, thereby constitute the negative pole part of magnetron at a distance of certain intervals; Upper magnetic pole is equipped with in the top of above-mentioned anodal barrel, and the bottom magnetic pole is equipped with in the below, and the upper and lower of above-mentioned upper magnetic pole and bottom magnetic pole is equipped with upper magnet and bottom magnet respectively, thereby they can form magnetic field; In addition, also possess the antenna that has passed above-mentioned upper magnetic pole in the magnetron, this antenna is used for exporting the higher-order of oscillation, can insert in order to make antenna, and make easier the carrying out of typing operation of the antenna of insertion, formed the peristome of opening outwardly on certain position of above-mentioned upper magnetic pole.
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 a longitdinal cross-section diagram shown in Figure 1
Fig. 3 is the ground plan of existing upper magnetic pole
Fig. 4 is the longitdinal cross-section diagram of magnetron of the structure of upper magnetic pole of the present invention
Fig. 5 is the ground plan of upper magnetic pole of the present invention
The number in the figure explanation:
1: yoke (yoke) 2: anodal barrel (cylinder)
3: blade (vane) 7: filament (filament)
13: upper magnetic pole 14: the bottom magnetic pole
21: upper magnet 22: bottom magnet
100: peristome
Embodiment
Shown in Fig. 4,5, the basic structure of the magnetron among the present invention and tool effect are same as the prior art, therefore for these identical parts, adopt identical symbol here, and omit the detailed description to these parts.
In the present invention, formed towards a side opening on certain position of upper magnetic pole (13), be used for inserting the peristome (100) of antenna (20), so antenna (20) can be inserted in this peristome (100).
If adopt aforesaid the present invention who forms peristome (100), so just can under the state that antenna (20) is inserted in the peristome (100), utilize the typing anchor clamps with antenna (20) typing, thereby antenna (20) is installed at a certain angle.Here, owing to formed above-mentioned peristome (100), the therefore easier anchor clamps of will finalizing the design insert, and assembling operation is easier to carry out thereby make.
The effect of invention
As mentioned above, according to the structure of the upper magnetic pole of magnetron of the present invention, certain position of upper magnetic pole On formed peristome towards outward opening, antenna can be inserted in the above-mentioned peristome, and can utilize Shape-setting clamp gives the final shaping to the antenna of such installation. That is to say, when finalizing the design operation, Shape-setting clamp can be inserted by above-mentioned peristome, so the present invention can make, and the typing operation is easier advances OK.
Claims (1)
1, a kind of structure of upper magnetic pole of magnetron, it is characterized in that: this magnetron has following structure, anodal barrel is equipped with in the inside that is yoke, and several blades that is radial arrangement are equipped with in the inside of anodal barrel, and this anodal barrel and blade have constituted the anode portion of magnetron together; On the central shaft of above-mentioned anodal barrel filament is housed, the front end of this filament and blade can discharge hot electron, thereby constitute the negative pole part of magnetron at a distance of certain intervals; Upper magnetic pole is equipped with in the top of above-mentioned anodal barrel, and the bottom magnetic pole is equipped with in the below, and the upper and lower of above-mentioned upper magnetic pole and bottom magnetic pole is equipped with upper magnet and bottom magnet respectively, thereby they can form magnetic field; In addition, also possess the antenna that has passed above-mentioned upper magnetic pole in the magnetron, this antenna is used for exporting the higher-order of oscillation, can insert in order to make antenna, and make easier the carrying out of typing operation of the antenna of insertion, formed the peristome of opening outwardly on certain position of above-mentioned upper magnetic pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410094039 CN1797673A (en) | 2004-12-27 | 2004-12-27 | Structure of upper magnetic pole of magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410094039 CN1797673A (en) | 2004-12-27 | 2004-12-27 | Structure of upper magnetic pole of magnetron |
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| Publication Number | Publication Date |
|---|---|
| CN1797673A true CN1797673A (en) | 2006-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410094039 Pending CN1797673A (en) | 2004-12-27 | 2004-12-27 | Structure of upper magnetic pole of magnetron |
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| CN (1) | CN1797673A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116347738A (en) * | 2021-12-23 | 2023-06-27 | 明远精密科技股份有限公司 | A composite plasma source and its operation method |
-
2004
- 2004-12-27 CN CN 200410094039 patent/CN1797673A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116347738A (en) * | 2021-12-23 | 2023-06-27 | 明远精密科技股份有限公司 | A composite plasma source and its operation method |
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