An efficient magnetron

Abstract

The present invention discloses an efficient magnetron, which includes an anode cylinder assembly, a cathode assembly, a magnetic pole assembly, an antenna assembly, a lead structure, a filter box and a heat sink. The anode cylinder assembly includes an anode cylinder and a plurality of anode plates, and the anode plates are evenly spaced on the inner side wall of the anode cylinder to form a resonant system; both ends of the anode cylinder are sealed and supported by strontium ferrite and magnetic pole plates respectively; the filament of the cathode assembly is supported by two rods to the center position of the anode diameter, and the other ends of the rods are connected to the filter box through the lead structure, and the antenna assembly is arranged at the other end of the anode assembly; the heat sink is evenly fixed on the outer side surface of the anode cylinder. The present invention optimizes the matching values of each part, enables the magnetron to have better performance parameters, can efficiently convert electrical energy into microwave energy, and can be efficiently coupled to the load; adopts a new type of lead structure, and no additional fixture is required for positioning during welding, reducing the use of the magnetron processing positioning tooling, and improving the production efficiency and product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetrons, and in particular to a high-efficiency magnetron. Background Art

[0002] With the development of material science and process technology, people have higher and higher requirements for energy conservation and environmental protection. The market puts forward higher requirements for the energy efficiency and cost of magnetrons. The trend of magnetrons developing towards high efficiency and low cost becomes more and more obvious. Each company has successively launched high-efficiency products. The company is a newly invested magnetron project, and invests resources to develop a high-efficiency and low-cost magnetron with independent intellectual property rights. Summary of the Invention

[0003] In view of the above background and the problems existing in the prior art methods, the present invention provides a high-efficiency magnetron. The technical solution of the present invention is as follows:

[0004] A high-efficiency magnetron includes an anode cylinder assembly, a cathode assembly, a magnetic pole assembly, an antenna assembly, a lead structure, a filter box and a heat sink. The anode cylinder assembly includes an anode cylinder and a plurality of anode plates. The anode plates are evenly spaced and distributed on the inner side wall of the anode cylinder to form a resonance system with a diameter of 7.9 - 8.1 mm; the magnetic pole assembly includes strontium ferrite and a magnetic pole plate. The two ends of the anode cylinder are respectively sealed and supported by the strontium ferrite and the magnetic pole plate; the filament of the cathode assembly is supported by two rods to the center position of the anode diameter. The other ends of the rods are connected to the filter box through the lead structure as the input end of the magnetron; the antenna assembly is arranged at the other end of the anode cylinder assembly and is connected to the anode plate through the antenna as the output end of the magnetron; the heat sink is evenly fixed on the outer side surface of the anode cylinder.

[0005] As a further description of the present invention, the inner diameter of the anode cylinder is 34.8 - 35.2 mm.

[0006] Furthermore, the number of the anode plates is 10, which are evenly distributed on the inner wall along the axis of the anode cylinder. The distance between the front ends of two opposite anode plates is 7.9 - 8.1 mm, forming a resonance system with a diameter of 7.9 - 8.1 mm.

[0007] Furthermore, the magnetic pole plate protrudes into the anode cylinder to form a flat surface of the pole shoe. The middle part of the flat surface of the pole shoe is an end space. The cathode assembly passes through the end space so that the filament is at the center position of the resonance system and is coaxial with the anode cylinder; the ratio of the distance between the two flat surfaces of the pole shoes to the height of the anode plate is 1.25 - 1.27.

[0008] Furthermore, the diameter of the end space in the middle of the flat surface of the pole shoe is 8.4 - 8.6 mm.

[0009] Furthermore, the diameter of the filament is 3.48 - 3.52 mm.

[0010] Further, the diameter ratio of the anode and cathode of the magnetron is 0.4405 - 0.4345.

[0011] Further, the lead structure includes ceramics and leads. Two lead holes are provided in the axial direction of the ceramics. The lead holes penetrate from the outer end face of the ceramics to the inner end face. One end of the lead is a cylindrical section. After passing through the lead hole of the ceramics, it is brazed and sealed with the connecting piece. A limiting groove is provided on the outer side of the ceramics. Correspondingly, the lead includes a bent section that is matched and limited with the limiting groove.

[0012] Further, the limiting groove is one or two long grooves, and the width thereof matches the diameter of the lead.

[0013] Further, the outer end of the lead is flattened and bent into an open semi-circular arc state, which is convenient for welding with the inductor in the filter box to ensure the welding and effective contact effect between the two.

[0014] Advantages of the present invention:

[0015] The present invention is composed of six major parts: an anode cylinder assembly, a cathode assembly, an output assembly, a magnetic circuit system, a heat dissipation structure, and a shielding structure. The matching values of each part are optimized, so that the magnetron has better performance parameters. When powered on, electrical energy can be efficiently converted into microwave energy and can be efficiently coupled to the load. A new type of lead structure is adopted. Through the mutual limiting structure between materials, during the processing, two leads pass through the lead holes of the ceramics and are introduced into the magnetron. When brazing and sealing with the connecting piece, due to the limiting groove on the ceramics forming positioning and limiting for the two leads, the mutual limiting between materials is directly realized, so that they will not rotate and shift. When welding, there is no need to use additional fixtures for positioning, reducing the use of the magnetron processing positioning tooling and improving the production efficiency and product quality of the magnetron. Description of the drawings

[0016] Figure 1 It is a sectional structure diagram of the high-efficiency magnetron of the present invention;

[0017] Figure 2 It is a ceramic structure diagram of the present invention;

[0018] Figure 3 It is a lead structure diagram of the present invention;

[0019] Figure 4 It is a schematic diagram of the combined structure of the ceramics and leads of the present invention.

[0020] Reference numerals: anode cylinder 1, anode plate 2, strontium ferrite 3, magnetic pole plate 4, end space 401, filament 5, filter box 6, antenna 7, heat sink 8, ceramics 9, limiting groove 901, lead 10. Detailed Implementation Manner

[0021] Example:

[0022] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0024] As shown in the attached Figure 1 As shown in the figure, a high-efficiency magnetron includes an anode cylinder assembly, a cathode assembly, a magnetic pole assembly, an antenna assembly, a lead structure, a filter box 6 and a heat sink 8. The anode cylinder assembly includes an anode cylinder 1 and a plurality of anode plates 2. The anode plates 2 are evenly spaced on the inner side wall of the anode cylinder 1 to form a resonant system with a diameter H of 7.9 - 8.1 mm. The magnetic pole assembly includes strontium ferrite 3 and a magnetic pole plate 4. The two ends of the anode cylinder 1 are respectively covered and supported by the strontium ferrite 3 and the magnetic pole plate 4. The filament 5 of the cathode assembly is supported by two rods to the center position of the anode diameter. The other ends of the rods are connected to the filter box 6 through the lead structure, serving as the input end of the magnetron. The antenna assembly is arranged at the other end of the anode cylinder assembly and is connected to the anode plate 2 through the antenna 7, serving as the output end of the magnetron. The heat sink 8 is evenly fixed on the outer side surface of the anode cylinder 1.

[0025] As shown in the attached drawings, the inner diameter of the anode cylinder 1 in this embodiment ranges from 34.8 to 35.2 mm. Ten anode plates 2 are evenly arranged on its inner side surface along the axis of the anode cylinder 1 to form a resonant system. After welding, the distance between the front ends of two opposite anode plates 2 is 7.9 - 8.1 mm, that is, a resonant system with a diameter H of 7.9 - 8.1 mm is formed.

[0026] As shown in the attached drawings, the upper and lower ends of the anode cylinder 1 are respectively covered by two upper and lower magnetic pole plates 4. The magnetic pole plate 4 protrudes into the anode cylinder 1 to form a flat surface of the pole shoe. The middle part of the flat surface of the pole shoe is an end space 401. The cathode assembly passes through the end space 401 so that the filament 5 is at the center position of the resonant system and is coaxial with the anode cylinder 1. In this embodiment, in a preferred implementation, the ratio of the distance between the two flat surfaces of the pole shoes to the height of the anode plate 2 is between 1.25 and 1.27, and its end space 401 is controlled at 8.4 - 8.6 mm.

[0027] The diameter of the filament 5 is between 3.48 and 3.52 mm, and the diameter ratio of the anode to the cathode is between 0.4405 and 0.4345. By optimizing the matching values of each part as described above, the magnetron has better performance parameters, and when powered on, it can efficiently convert electrical energy into microwave energy and efficiently couple it to the load.

[0028] Referring to the attached drawings, the cathode end of the magnetron is sealed by the lead structure. Specifically, the lead structure of this embodiment includes a ceramic 9 and a lead 10. The ceramic 9 is provided with two lead holes in the axial direction. The lead holes penetrate from the outer end face of the ceramic 9 body to its inner end face. One end of the lead 10 is a cylindrical section. After passing through the lead hole of the ceramic 9, it is brazed and sealed with a connecting piece to achieve the sealing of one end of the magnetron. In this embodiment, a limiting groove 901 is provided on the outside of the ceramic 9. Correspondingly, the lead 10 includes a bent section. During the processing, two leads 10 pass through the lead holes of the ceramic 9 body and are introduced into the magnetron. When brazing and sealing with the connecting piece, due to the limiting groove 901 on the ceramic 9 body, the two leads 10 are limited and positioned, directly realizing the mutual positioning between materials, so that they will not rotate and shift. When welding, there is no need to use additional fixtures for positioning, reducing the use of the magnetron processing positioning tooling, and improving the production efficiency and product quality of the magnetron.

[0029] As shown in the attached drawings, the outer end of the lead 10 is flattened and bent into an open semi-circular arc shape, which is convenient for welding with the inductor in the filter box 6 to ensure the welding and effective contact effect between the two.

[0030] The above is only an illustration of the preferred embodiments of the present invention, but it should not be construed as a limitation of the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to change. In short, all changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. An efficient magnetron, characterized in that: It includes an anode cylinder assembly, a cathode assembly, a magnetic pole assembly, an antenna assembly, a lead structure, a filter box and a heat sink; the anode cylinder assembly includes an anode cylinder and a number of anode plates, and the anode plates are evenly spaced on the inner side wall of the anode cylinder to form a resonant system with a diameter of 7.9 - 8.1 mm; the magnetic pole assembly includes strontium ferrite and a magnetic pole plate, and both ends of the anode cylinder are respectively sealed and supported by the strontium ferrite and the magnetic pole plate; the filament of the cathode assembly is supported by two rods to the center position of the anode diameter, and the other ends of the rods are connected to the filter box through the lead structure, serving as the input end of the magnetron; the antenna assembly is installed at the other end of the anode cylinder assembly and is connected to the anode plate through the antenna, serving as the output end of the magnetron; the heat sink is evenly fixed on the outer side surface of the anode cylinder; The lead structure includes ceramics and leads. Two lead holes are provided in the axial direction of the ceramics, and the lead holes penetrate from the outer end face of the ceramics to its inner end face. One end of the lead is a cylindrical section, which is brazed and sealed with a connecting piece after passing through the lead hole of the ceramics. A limiting groove is provided on the outer side of the ceramics, and the lead includes a bent section that is matched and limited with the limiting groove; The limiting groove is one or two long grooves, and its width matches the diameter of the lead; The outer end of the lead is flattened and bent into an arc shape with an open semi-circle; The magnetic pole plate protrudes into the anode cylinder to form a flat surface of the pole shoe. The middle part of the flat surface of the pole shoe is an end space, and the cathode assembly passes through the end space so that the filament is at the center position of the resonant system and is coaxial with the anode cylinder; the ratio of the distance between the two flat surfaces of the pole shoes to the height of the anode plate is 1.25 - 1.27; The diameter of the end space in the middle of the flat surface of the pole shoe is 8.4 - 8.6 mm; The diameter of the filament is 3.48 - 3.52 mm; The inner diameter of the anode cylinder is 34.8 - 35.2 mm; The number of the anode plates is 10, which are evenly distributed on its inner wall along the axis of the anode cylinder. The distance between the front ends of two opposite anode plates is 7.9 - 8.1 mm, forming a resonant system with a diameter of 7.9 - 8.1 mm.

2. The high-efficiency magnetron according to claim 1, wherein: The diameter ratio of the anode and cathode of the magnetron is 0.4405 - 0.4345.

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