CN102339710B - Magnetron - Google Patents
Magnetron Download PDFInfo
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- CN102339710B CN102339710B CN201110220450.8A CN201110220450A CN102339710B CN 102339710 B CN102339710 B CN 102339710B CN 201110220450 A CN201110220450 A CN 201110220450A CN 102339710 B CN102339710 B CN 102339710B
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Abstract
The invention relates to a magnetron which comprises an anode part and a cathode part; the anode part comprises an anode tube, anode blades which are fixed on the inner surface of the anode tube, and a large cross ring chain, a small cross ring chain and an output antenna which are arranged in the anode tube; the cathode part comprises a central support rod component and a spiral filament which is wound on the central support rod component; a pair of conical magnetic poles, which are made of soft magnetic materials, is symmetrically arranged in the axial direction of the anode part; the oscillation wavelength of a main oscillation pi mode of the magnetron is lambda, and the frequency is fo; the distance s from the top ends of the anode blades to the bottoms of the conical magnetic poles is between 0.04 lambda to 0.1 lambda; and the heights ha of the anode blades are between 0.14 lambda to 0.20 lambda. According to the invention, the main mode oscillation frequency and the coupling degree of the magnetron basically remain unchanged, so that the oscillation of a parasitic mode on the end is farther from the main mode oscillation frequency, and the magnetron which oscillates stably in the pi mode and has high microwave output efficiency. The product performance is stable, the structural design is simple, the process is convenient to realize and the cost is low.
Description
Technical field
The present invention relates to magnetron, particularly a kind of magnetron of the 5.8GHz frequency range for microwave oven or industrial microwave apparatus.
Background technology
Magnetron is the radio tube that produces microwave, because oscillation efficiency is high, microwave output power is large, except being widely used in household microwave oven, and also a large amount of microwave sources as microwave processing equipments such as industry heating, chemical treatments.And along with the development of microwave technology, need the magnetron of higher frequency, and as 5.8GHz frequency range continuous wave magnetron, improve the action effect of microwave and dielectric material, improve material property, for the research of new material provides more effectively treatment technology.
General magnetron, its anode component is the resonance chamber being made up of anode canister, large commissure ring, little commissure ring and several blades, while being operated in the main oscillations pattern that is referred to as π pattern, between its adjacent cavities, the phase difference at vane end faces place is π.But due to structure, magnetron can produce the many oscillation modes except this π pattern, and form end parasitic oscillation between anode blade two side ends, large commissure ring, little commissure ring top and magnetic pole bottom.Particularly, in the time that frequency of oscillation improves, end parasitic oscillation is more outstanding, thereby causes magnetron job insecurity, oscillation frequency spectral difference and microwave delivery efficiency low, even the magnetron problem such as cannot work.
The negative effect bringing for fear of the parasitic oscillation of magnetron end normally configures absorbing material or other filter etc. of this parasitic oscillation pattern in end space; But this technical scheme complex structure, requirement on machining accuracy are high, and manufacturing cost improves greatly.
Summary of the invention
Key entry the object of the invention is to consider the problems referred to above and provides a kind of in the situation that not improving manufacturing cost herein, reduce the impact of end spurious mode on π pattern as far as possible, stable oscillation stationary vibration is at the magnetron of 5.8GHz frequency range, and this microwave magnetron delivery efficiency is high, magnetron long working life.Meanwhile, structural design of the present invention is simple, and technique realizes easily, and the cost of material is low.
The technical scheme that realizes the object of the invention is: a kind of magnetron, include anode component, cathode assembly, anode component comprises the anode canister of cylindrical tube shape, be fixed in anode canister inner wall surface radial some anode blades and be placed in the large commissure ring in anode canister, little commissure ring and antenna, cathode assembly comprises with the center fulcrum bar component of the coaxial assembling of anode component with around the helical heater on the fulcrum bar component of center, the conical magnet poles of a pair of soft magnetic material is installed on the axial direction of anode component symmetrically, the oscillation wavelength of magnetron main oscillations π pattern is λ, frequency is fo, it is characterized in that, the distance s of conical magnet poles bottom is arrived within the scope of 0.04 λ ~ 0.1 λ in the top of described anode blade, the height ha of anode blade is within the scope of 0.14 λ ~ 0.20 λ.
The diameter d c2 of above-mentioned magnetic pole bottom burnishing surface, in the middle of magnetic pole bottom, the diameter of circular hole is dc1, the inscribed circle diameter that all anode blade end faces form centered by anode canister axis is da, the internal-and external diameter of little commissure ring is respectively dr1, dr2, the internal-and external diameter of large commissure ring is respectively db1, db2, and described each part dimension meets following relational expression:
da<dc1<dr1,db1<dc2<db2。
The caused parasitic oscillation frequency f 1 in the above-mentioned conical magnet poles bottom surface being oppositely arranged and described anode blade both sides end face, the large commissure ring in both sides and little commissure ring top meets following relational expression: f1-fo>150MHz with described main oscillations π mode oscillation frequency f o.
The invention has the beneficial effects as follows, owing to adopting after above-mentioned physical dimension, can keep the main mode oscillation frequency of magnetron and the degree of coupling substantially constant, and by improving the frequency of oscillation f1 of end spurious mode, make itself and main mode oscillation frequency f o apart from each other, the vibration that is to say end space spurious mode affects and reduces π mode oscillation, and result obtains the magnetron so that π mode stable vibrates, microwave delivery efficiency is high.Therefore, properties of product are stable, and structural design is simple, and technique realizes convenient and cost is low.
Brief description of the drawings
Fig. 1 is the structural representation of Anodic resonator system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
As shown in Figure 1, the present invention is a kind of magnetron, include anode component, cathode assembly, anode component comprises the anode canister 1 of cylindrical tube shape, be fixed in anode canister 1 inner wall surface radial some anode blades 11 and be placed in the large commissure ring 12 coaxial with anode canister 1 in anode canister 1, little commissure ring 13 and antenna, cathode assembly comprises with the center fulcrum bar component of the coaxial assembling of anode component with around the helical heater 2 on the fulcrum bar component of center, the conical magnet poles 3 of a pair of soft magnetic material is installed on the axial direction of anode component symmetrically, the oscillation wavelength of main oscillations π pattern of the present invention is λ, frequency of oscillation is fo, it is characterized in that, the distance s of conical magnet poles bottom 31 is arrived within the scope of 0.04 λ ~ 0.1 λ in the top of described anode blade 11, the height ha of anode blade 11 is within the scope of 0.14 λ ~ 0.20 λ.
The diameter of above-mentioned magnetic pole bottom 31 burnishing surfaces is dc2, in the middle of magnetic pole bottom 31, the diameter of circular hole is dc1, the inscribed circle diameter that all anode blade 11 end faces form centered by anode canister axis is da, the internal-and external diameter of little commissure ring 13 is respectively dr1, dr2, the internal-and external diameter of large commissure ring 12 is respectively db1, db2, and described each part dimension meets following relational expression:
da<dc1<dr1,db1<dc2<db2。
The above-mentioned conical magnet poles bottom 31 being oppositely arranged meets following relational expression: f1-fo>150MHz with described anode blade 11 both sides end faces, the large commissure ring 12 in both sides and the little commissure ring 13 caused parasitic oscillation frequency f 1 in top with described main oscillations π mode oscillation frequency f o.
The present invention adopts after above-mentioned physical dimension, can keep magnetron main mode oscillation frequency f o and the degree of coupling substantially constant, and by improving the frequency of oscillation f1 of end spurious mode, make f1 and main mode oscillation frequency f o apart from each other, f1-fo>150MHz, the vibration that is to say end space spurious mode is very little on the impact of π mode oscillation, and result obtains the magnetron so that π mode stable vibrates, microwave delivery efficiency is high.Therefore, properties of product are stable, and structural design is simple, and technique realizes convenient and cost is low.
The present invention can be widely used as the magnetron of the 5.8GHz frequency range of microwave oven or industrial microwave apparatus.
Claims (1)
1. a magnetron, includes anode component, cathode assembly, and anode component comprises the anode canister (1), solid of cylindrical tube shape
Fix on radial some anode blades (11) in anode canister (1) inner wall surface and be placed in the large commissure ring (12) in anode canister (1), little commissure ring (13) and antenna, cathode assembly comprises with the center fulcrum bar component of the coaxial assembling of anode component with around the helical heater (2) on the fulcrum bar component of center, the conical magnet poles (3) of a pair of soft magnetic material is installed on the axial direction of anode component symmetrically, the oscillation wavelength of magnetron main oscillations π pattern is λ, frequency is fo, the distance s of conical magnet poles bottom (31) is arrived within the scope of 0.04 λ ~ 0.1 λ in the top of described anode blade (11), the height ha of anode blade (11) is within the scope of 0.14 λ ~ 0.20 λ, be characterised in that: described in the conical magnet poles bottom (31) and described anode blade (11) both sides end face that are oppositely arranged, the caused parasitic oscillation frequency f 1 in the large commissure rings in both sides (12) and little commissure ring (13) top meets following relational expression: fl-fo>150MHz with described main oscillations π mode oscillation frequency f o, the diameter of the burnishing surface of described magnetic pole bottom (31) is dc2, in the middle of magnetic pole bottom (31), the diameter of circular hole is dcl, the inscribed circle diameter that all anode blades (11) end face forms centered by anode canister axis is da, the internal-and external diameter of little commissure ring (13) is respectively drl, dr2, the internal-and external diameter of large commissure ring (12) is respectively dbl, db2, described each part dimension meets following relational expression: da<dcl<drl, dbl<dc2<db2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110220450.8A CN102339710B (en) | 2011-08-03 | 2011-08-03 | Magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110220450.8A CN102339710B (en) | 2011-08-03 | 2011-08-03 | Magnetron |
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| Publication Number | Publication Date |
|---|---|
| CN102339710A CN102339710A (en) | 2012-02-01 |
| CN102339710B true CN102339710B (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110220450.8A Active CN102339710B (en) | 2011-08-03 | 2011-08-03 | Magnetron |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106711001B (en) * | 2016-11-18 | 2018-04-06 | 广东威特真空电子制造有限公司 | A kind of magnetron frequency modulation device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4855645A (en) * | 1986-10-06 | 1989-08-08 | Kabushiki Kaisha Toshiba | Magnetron for microwave oven |
| CN1677609A (en) * | 2004-03-11 | 2005-10-05 | 东芝北斗电子株式会社 | Magnetron for microwave oven |
| CN101853759A (en) * | 2009-03-30 | 2010-10-06 | 东芝北斗电子株式会社 | Magnetron for microwave oven |
| CN202205693U (en) * | 2011-08-03 | 2012-04-25 | 广东威特真空电子制造有限公司 | Magnetron |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4815146B2 (en) * | 2005-04-25 | 2011-11-16 | パナソニック株式会社 | Magnetron |
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2011
- 2011-08-03 CN CN201110220450.8A patent/CN102339710B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4855645A (en) * | 1986-10-06 | 1989-08-08 | Kabushiki Kaisha Toshiba | Magnetron for microwave oven |
| CN1677609A (en) * | 2004-03-11 | 2005-10-05 | 东芝北斗电子株式会社 | Magnetron for microwave oven |
| CN101853759A (en) * | 2009-03-30 | 2010-10-06 | 东芝北斗电子株式会社 | Magnetron for microwave oven |
| CN202205693U (en) * | 2011-08-03 | 2012-04-25 | 广东威特真空电子制造有限公司 | Magnetron |
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| CN102339710A (en) | 2012-02-01 |
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