CN1797672A - Shielding structure of magnetron - Google Patents
Shielding structure of magnetron Download PDFInfo
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- CN1797672A CN1797672A CN 200410094038 CN200410094038A CN1797672A CN 1797672 A CN1797672 A CN 1797672A CN 200410094038 CN200410094038 CN 200410094038 CN 200410094038 A CN200410094038 A CN 200410094038A CN 1797672 A CN1797672 A CN 1797672A
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Abstract
Shielding piece is combined with inner side of the A-sealing element. Up end part of the shielding piece is flexed along horizontal direction so as to form flange part. The end part of the flange part is flexed along vertical direction so as to form vertical hanging joint part. When being combined to inner side of A-ceramics weld zone of the A-sealing element in insert mode, the vertical hanging joint part is in use for preventing wandering from happening. When shielding piece is welded to vertical flexed part of the A-sealing element, the invention keeps a certain gap between the shielding piece and the vertical flexed part in order to maintain stable electromagnetical characters.
Description
Technical field
The present invention relates to a kind of shielding construction 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 (endsealed) 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 (side lead) 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-seal 15 and the F-seal 16 of drum respectively by method for brazing (brazing); The upper end of above-mentioned A-seal l5 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-seal 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-seal 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 through hole that forms on the 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.
The inboard of above-mentioned A-seal 15 is combined with the shielding part 43 that is used to weaken unnecessary high frequency composition, and as shown in Figure 3, this shielding part 43 combines with the vertical joggling part 15a of the A-seal 15 of drum, makes both keep certain clearance G.The flange part 43a solder bond of the horizontal warpage in upper end of this shielding part 43 is at A-seal 15 downside of the A-ceramic welding 15b of portion of warpage upwards.
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 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 surfaces 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 3 of direction 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 by relative blade 3 of above-mentioned direction and the inductance composition that the anodal barrel 2 that blade couples together is constituted.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 that the electromagnetic wave noise that leaks to input part can be installed in yoke 1 below cuts off, and so just can prevent that these electromagnetic wave noises are to external leaks; Sealing gasket (gasket) 51 outside the electromagnetic wave noise that efferent leaks then can be installed in A-seal upper end cuts off.
But there are the following problems to have the magnetron of said structure.When the inboard of A-seal 15 welding shielding part 43, because of moving about of shielding part 43, depart from correct position sometimes, cause the clearance G between the vertical joggling part 15a of shielding part 43 and A-seal 15 can not keep certain spacing, make the attenuation characteristics deviation of each product very big.
Summary of the invention
In order to overcome the above-mentioned shortcoming that prior art exists, the invention provides a kind of shielding construction of magnetron, during the vertical joggling part of welding shielding part and A-seal, make to connect shielding part and remain certain clearance, and then can keep stable electromagnetic signature (EMI) with the vertical joggling part of A-seal.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of shielding construction of magnetron, the inboard of its A-seal is combined with shielding part, it is characterized in that: the upper end of above-mentioned shielding part forms flange part to the horizontal direction warpage, the end of this flange part, be formed with vertical mounting part to the vertical direction warpage, this vertical mounting part is used to prevent with inserted mode vertical mounting part is attached to the A-ceramic welding portion of A-seal when inboard, and generation is moved about.
Aforesaid magnetron shielding construction, wherein vertical mounting part is along the end of above-mentioned flange part, and the one warpage forms.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the shielding construction schematic diagram of traditional magnetron.
Fig. 2 is a magnetron skiagraph shown in Figure 1.
Fig. 3 is an A portion enlarged diagram shown in Figure 2.
Fig. 4 has the magnetron skiagraph of shielding construction for the present invention.
Fig. 5 is the enlarged diagram of B shown in Figure 4 portion.
Fig. 6 is a shielding part schematic diagram of the present invention.
The number in the figure explanation:
15:A-seal 15a: vertical joggling part
15b:A-ceramic welding portion 43: shielding part
43a: flange part 100: vertical mounting part
Embodiment
Shown in Fig. 4,5,6, magnetron basic structure of the present invention is identical with conventional art with effect, therefore, uses same numeral for same section, and detailed.
Characteristics of the present invention are, have shielding part, and shielding part is positioned at the inboard of above-mentioned A-seal 15, is used to cut down unnecessary high frequency.
Above-mentioned shielding part 43 combines with the vertical joggling part 15a of round barrel shape A-seal 15, and keep certain clearance, the flange part 43a that the medial surface with A seal 15 of the integrally formed oriented horizontal direction warpage in the upper end of this shielding part 43 combines, the end of flange part 43a is formed with vertical mounting part 100, the end of flange part forms to the horizontal direction warpage in the upper end of above-mentioned shielding part, the vertical mounting part vertical warpage that makes progress forms, vertical mounting part is used to prevent with inserted mode vertical mounting part is combined in the A-ceramic welding 15b of portion of A-seal 15 moving about when inboard, the A-ceramic welding 15b of portion is formed on the A-seal, and upwards warpage forms.
Magnetron with shielding part of said structure, when shielding part 43 is combined in A-seal 15, shielding part 43 is combined in the inboard of A-seal 15 with the inserted mode handle, make the vertical mounting part 100 that is formed on shielding part 43 upper ends be inserted into the A-ceramic welding 15b of the portion downside insertion section of A-seal 15, prevent motility with this, at this moment, contact site to A-seal 15 and shielding part 43, carry out combination by welding, and then, make between the vertical joggling part 15a of shielding part 43 and A-seal 15 to keep certain interval (G).
The present invention has following effect: the flange part end of the shielding part of magnetron of the present invention is formed with the vertical mounting part to the vertical direction warpage, when shielding part is assembled in vertical mounting part, vertical mounting part is inserted into be positioned at the insertion section of A-seal A-ceramic welding subordinate side, and then can prevent under its state that moves about, carry out combination, therefore remain certain clearance between the vertical joggling part of shielding part and A-seal, and then can improve electromagnetic signature (EMI).
Claims (2)
1, a kind of shielding construction of magnetron, the inboard of its A-seal is combined with shielding part,
It is characterized in that: the upper end of above-mentioned shielding part forms flange part to the horizontal direction warpage, the end of this flange part, be formed with vertical mounting part to the vertical direction warpage, this vertical mounting part is used to prevent with inserted mode vertical mounting part is attached to the A-ceramic welding portion of A-seal when inboard, and generation is moved about.
2, magnetron shielding construction according to claim 1 is characterized in that: above-mentioned vertical mounting part is along the end of above-mentioned flange part, and the one warpage forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410094038 CN1797672A (en) | 2004-12-27 | 2004-12-27 | Shielding structure of magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410094038 CN1797672A (en) | 2004-12-27 | 2004-12-27 | Shielding structure of magnetron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1797672A true CN1797672A (en) | 2006-07-05 |
Family
ID=36818618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410094038 Pending CN1797672A (en) | 2004-12-27 | 2004-12-27 | Shielding structure of magnetron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1797672A (en) |
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2004
- 2004-12-27 CN CN 200410094038 patent/CN1797672A/en active Pending
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20060705 |