CN1797671A - Structure for assembling laminae of magnetron - Google Patents

Abstract

Multiple blades in radial direction are setup in inner side of anode barrel. Back end parts of blades are welded to face of inner circumference of anode barrel. Mounting grooves for blades are in perpendicular directions along inner circumference of anode barrel. The Mounting grooves are in use for back end parts of blades to be inserted. When blades are assembled on anode barrel, the invention prevents blades from shake or shift. Further, the invention ensures blades installed inner side of the anode barrel in same angle.

Description

The structure for assembling laminae of magnetron

Technical field

The present invention relates to a kind of structure for assembling laminae 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 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-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.

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.

Undeclared label 51 is a sealing gasket among the figure, and 52 is sealing ring.

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.

Like this electronic population that forms by electronic motion can divide it with the inverse of the multiple of higher-order of oscillation frequency-cycle blade 3 produced disturb, 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 $f=\frac{1}{2\mathrm{\π}\sqrt{\mathrm{LC}}}$ 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.

In addition, as shown in Figure 3, be arranged on the inboard blade 3 of above-mentioned anodal barrel 2, utilizing anchor clamps that rearward end is under the state of combining closely with the inner peripheral surface of anodal barrel 2, utilize the contact site of Ag-welding wire welding anodal barrel 2 and blade 3 by welding manner.

But there is the easily loosening defective of blade in existing magnetron when blade 3 is installed to anodal barrel 2, under the situation of rocking, weld, so, have the shortcoming of the characteristic that reduces product.

Summary of the invention

In order to overcome the above-mentioned shortcoming that existing magnetron exists, the invention provides a kind of structure for assembling laminae of magnetron, this assembling blade installation is when anodal barrel, and it can effectively prevent rocking or being shifted of blade, and then makes blade be installed in the inboard of anodal barrel with same angle.

The technical solution adopted for the present invention to solve the technical problems is:

A kind of structure for assembling laminae of magnetron, the anodal barrel inboard is provided with a plurality of blades with radial, and the rearward end of blade is welded mutually with the inner peripheral surface of anodal barrel; It is characterized in that: described anodal barrel inner peripheral surface is formed with the blade installation groove to vertical direction, and the blade installation groove is used to insert the rearward end that blade is installed.

The package assembly of aforesaid magnetron blade, wherein the blade installation groove is recessed to form to radial direction.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the structural representation of existing magnetron.

Fig. 2 is the vertical section schematic diagram of the existing magnetron of Fig. 1.

Fig. 3 is for having in the magnetron state section portion schematic diagram when blade is welded on the anodal barrel now.

Fig. 4 is the magnetron vertical section schematic diagram with anodal barrel package assembly of the present invention.

Fig. 5 is in the magnetron of the present invention, the state section portion schematic diagram when blade is welded on the anodal barrel.

Fig. 6 is the schematic diagram of anodal barrel of the present invention.

The number in the figure explanation:

2: anodal barrel 3: blade

100: the blade installation groove

Embodiment

Shown in Fig. 4,5,6, for forming the basic structure and the effect of magnetron, the present invention is identical with prior art, therefore, adopts same label for same section, omits detailed explanation.

In the structure of the present invention, columnar anodal barrel 2 inboards are provided with a plurality of blades 3 with radial, the rearward end of blade 3 is inserted in the blade installation groove 100 of above-mentioned anodal barrel inner peripheral surface, blade installation groove 100 is formed on above-mentioned anodal barrel inner peripheral surface to vertical direction, and by the welding manner combination.

Above-mentioned blade installation groove 100 is recessed to form to radial direction, can make the rearward end of blade 3 insert above-mentioned blade installation groove 100, and each blade installation groove 100 has same angle.

As mentioned above, when blade 3 is installed in the anodal barrel 2 that is formed with blade installation groove 100, the rearward end of each blade 3 is inserted into the blade installation groove 100 that is formed on anodal barrel 2 inner peripheral surfaces respectively, and utilizes silver solder welding blade 3 to get final product respectively.Therefore, welding can not occur rocking during blade 3 or phenomenon such as displacement, and then blade 3 can be with the inboard of same fixed angle at anodal barrel 2.

The present invention has following effect: the magnetron structure for assembling laminae characteristics that the present invention relates to are, the inner peripheral surface of anodal barrel is formed with the blade installation groove that is used for inserting by same interval the blade rearward end, during the assembling blade, after each blade rearward end is inserted the blade installation groove, the contact site is welded fixing, therefore, welding can not occur rocking during blade or phenomenon such as displacement, and then, can improve product performance.

Claims (2)

1, a kind of structure for assembling laminae of magnetron, the anodal barrel inboard is provided with a plurality of blades with radial, and the rearward end of blade is welded mutually with the inner peripheral surface of anodal barrel; It is characterized in that: described anodal barrel inner peripheral surface is formed with the blade installation groove to vertical direction, and the blade installation groove is used to insert the rearward end that blade is installed.

2, the package assembly of magnetron blade according to claim 1 is characterized in that: described blade installation groove is recessed to form to radial direction.

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