Magnetron structure

Abstract

The invention provides a magnetron structure. The magnetron structure comprises a main body part which is provided with an accommodating cavity; the main body part is provided with a plurality of fan blade parts, and the multiple fan blade parts are arranged around the containing cavity at intervals; a resonant cavity is formed in a gap between every two adjacent fan blade parts; the resonant cavity is communicated with the accommodating cavity; the mounting groove is formed in the multiple fan blade parts and communicates with the resonant cavity, so that an annular groove is defined; the diaphragm belt is arranged in the mounting groove; wherein the mounting groove comprises a shallow groove section and a deep groove section, and the depth of the deep groove section is larger than that of the shallow groove section in the extending direction of the containing cavity; at least two shallow groove sections and at least two deep groove sections are arranged, and the shallow groove sections and the deep groove sections are alternately arranged at intervals. Through the technical scheme provided by the invention, the technical problem that the supporting stability of the structure for supporting the diaphragm belt in the magnetron in the prior art is relatively poor can be solved.

Description

Technical Field

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

[0002] At present, the diaphragm belt in the S-band pulse magnetron plays an important role, and its performance directly affects the key indicators of the magnetron such as output power and frequency stability.

[0003] However, the existing diaphragm belt may suffer from fatigue damage, crack propagation and other problems during long-term use. Since the magnetron is usually in a high-power, high-frequency state when working, the diaphragm belt needs to withstand large mechanical stress and electromagnetic force, which makes it prone to fatigue failure. The supporting structure of the diaphragm belt in the prior art is a simple groove structure, and the supporting structure is directly connected to the diaphragm belt. This structure has low mechanical strength and is easy to break. It is also easy to cause the double-ring structural properties of the diaphragm belt to change, which makes the mode separation effect of the diaphragm belt worse, affecting the working stability of the magnetron. Summary of the invention

[0004] The main purpose of the present invention is to provide a magnetron structure to solve the technical problem of poor supporting stability of the structure for supporting the diaphragm belt in the magnetron in the prior art.

[0005] In order to achieve the above object, the present invention provides a magnetron structure, comprising:

[0006] The main body has a receiving cavity; the main body has a plurality of blades, and the plurality of blades are arranged around the receiving cavity at intervals; the gap between two adjacent blades forms a resonant cavity; the resonant cavity is connected to the receiving cavity;

[0007] A mounting groove and a diaphragm belt, wherein the mounting groove is arranged on the plurality of blades and communicates with the resonance cavity to form an annular groove; and the diaphragm belt is used to be arranged in the mounting groove;

[0008] Among them, the installation groove includes a shallow groove section and a deep groove section. Along the extension direction of the accommodating cavity, the depth of the deep groove section is greater than the depth of the shallow groove section; there are at least two shallow groove sections and deep groove sections, and the shallow groove sections and the deep groove sections are alternately arranged.

[0009] Further, the shallow groove section is arranged on one of the two adjacent blade sections, and the deep groove section is arranged on the other of the two adjacent blade sections; and / or,

[0010] One end of the shallow groove section is connected to one of the two adjacent resonant cavities, and the other end of the shallow groove section is connected to the other of the two adjacent resonant cavities; and / or,

[0011] One end of the deep slot section is communicated with one of the two adjacent resonant cavities, and the other end of the deep slot section is communicated with the other of the two adjacent resonant cavities.

[0012] Further, the depth of the deep groove section is greater than or equal to 2.5 mm and less than or equal to 3 mm; and / or,

[0013] The depth of the shallow groove section is greater than or equal to 0.8 mm and less than or equal to 1.3 mm; and / or,

[0014] The width of the deep groove section or the shallow groove section is greater than or equal to 1 mm and less than or equal to 2 mm.

[0015] Further, there are at least two mounting grooves, one of the at least two mounting grooves is a first mounting groove, and the other is a second mounting groove, and the first mounting groove is located on a side of the second mounting groove away from the accommodating cavity;

[0016] Wherein, the shallow groove section of the first installation groove and the shallow groove section of the second installation groove are staggered; and / or,

[0017] The deep groove section of the first installation groove and the deep groove section of the second installation groove are staggered.

[0018] Further, the distance between the first mounting groove and the second mounting groove is greater than or equal to 1.8 mm and less than or equal to 2.5 mm; and / or,

[0019] Along the circumferential direction of the first mounting groove, the first mounting groove and the second mounting groove are arranged at equal intervals.

[0020] Furthermore, there are at least two diaphragm belts, one of the at least two diaphragm belts is a first diaphragm belt, and the other is a second diaphragm belt. The first diaphragm belt is used to be arranged in the first installation groove, and the second diaphragm belt is used to be arranged in the second installation groove.

[0021] Furthermore, the diaphragm belt includes at least two first diaphragm segments and at least two second diaphragm segments, and the first diaphragm segments and the second diaphragm segments are alternately connected and arranged;

[0022] Wherein, one side of the first diaphragm segment is arranged flush with one side of the second diaphragm segment, and the other side of the first diaphragm segment protrudes from the other side of the second diaphragm segment; and / or,

[0023] The first diaphragm segment is clearance-matched with the deep groove segment; at least a portion of the second diaphragm segment is clearance-matched with the shallow groove segment.

[0024] Further, the resonant cavity comprises a first cavity section and a second cavity section connected to each other, and the first cavity section is located on a side of the second cavity section away from the accommodating cavity;

[0025] Wherein, along the radial direction of the main body, the cross section of the first cavity section is an arc shape; and / or,

[0026] Along the radial direction of the main body, the second cavity section is of equal width; and / or,

[0027] The mounting groove is arranged opposite to the second cavity section.

[0028] Further, there are at least two mounting grooves, one of the at least two mounting grooves is located at one end of the main body, and the other is located at the other end of the main body; there are at least two diaphragm bands, one of the at least two diaphragm bands is used to be arranged in one of the at least two mounting grooves, and the other is used to be arranged in the other of the at least two mounting grooves; and / or,

[0029] The width of the diaphragm strip is constant along the circumferential direction of the mounting groove; and / or,

[0030] Along the radial direction of the main body, the width of the diaphragm strip is determined according to the capacitance of the resonant cavity and the frequency separation of the diaphragm strip;

[0031] Among them, according to the formula Calculate the frequency separation, where C s =C ∑ -C r ; C ∑ is the total capacitance of multiple resonant cavities, C r is the capacitance of the resonant cavity, C s is the capacitance of the diaphragm tape, is the width of the diaphragm band in the radial direction of the main body, △ω is the angular frequency of the π mode and the adjacent The difference in mode angular frequency, N is the number of resonant cavities, ω x is the π mode angular frequency, λ x is the π mode resonance wavelength.

[0032] Further, the mounting groove is arranged at the end of the main body; and / or,

[0033] The magnetron structure further includes an anode portion, which is arranged on the fan blade portion and located on a side of the fan blade portion facing the accommodating cavity, and the mounting groove is spaced apart from the anode portion; and / or,

[0034] The magnetron structure also includes a cathode part, which is arranged in the accommodating cavity and spaced apart from the main body; both ends of the cathode part extend out of the accommodating cavity.

[0035] By applying the technical solution of the present invention, the mechanical strength of the mounting groove is firstly enhanced. The alternating arrangement of deep and shallow groove sections not only increases the support points of the diaphragm belt, but also optimizes its force distribution and improves the mechanical strength. The deep groove section can provide a more stable support for the diaphragm belt, and the difference in depth design between the deep groove section and the shallow groove section helps to adjust the capacitance between the diaphragm belt and the resonant cavity, thereby adjusting the equivalent impedance of the resonant cavity and achieving better impedance matching. This can reduce the energy loss and reflection caused by impedance mismatch, improve the electromagnetic conversion efficiency of the magnetron, and optimize electromagnetic performance, such as frequency stability. Secondly, by alternately arranging shallow groove sections and deep groove sections in the mounting groove, the contact area between the diaphragm belt and the fan blade is increased, and the heat dissipation efficiency is effectively improved. When the magnetron is working, the deep groove section can provide a larger surface area, which is conducive to the rapid conduction and dissipation of heat, thereby reducing the operating temperature of the diaphragm belt and improving its reliability under high-power pulse working conditions. The alternating distribution of the shallow groove section and the deep groove section, as well as the cooperation between the diaphragm belt and the mounting groove, work together to improve the stability of the magnetron structure. This design ensures that even under extreme working conditions of high power and high frequency, the various components of the magnetron can maintain a good relative position and matching state, reduce vibration and displacement, and extend the service life. Therefore, the technical problem of poor support stability of the structure used to support the diaphragm belt in the prior art magnetron can be solved through the technical solution of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0037] Figure 1 A cross-sectional schematic diagram of a main body of a magnetron structure provided in an embodiment of the present invention is shown;

[0038] Figure 2 A schematic cross-sectional view of a magnetron structure provided according to an embodiment of the present invention is shown;

[0039] Figure 3 A schematic cross-sectional view of a main body of a magnetron structure provided in accordance with an embodiment of the present invention is shown at another angle;

[0040] Figure 4 A schematic cross-sectional view of a magnetron structure according to an embodiment of the present invention is shown at another angle;

[0041] Figure 5 A schematic structural diagram of a diaphragm belt of a magnetron structure provided according to an embodiment of the present invention is shown;

[0042] Figure 6A schematic diagram showing the working principle of a magnetron structure provided according to an embodiment of the present invention is shown.

[0043] The above drawings include the following reference numerals:

[0044] 10. Main body;

[0045] 11. Accommodating cavity;

[0046] 12. Fan blade;

[0047] 13. Resonant cavity;

[0048] 131, first cavity section; 132, second cavity section;

[0049] 14. Mounting slot;

[0050] 141, first end mounting slot; 142, second end mounting slot;

[0051] 1401, shallow groove section; 1402, deep groove section;

[0052] 1411, first installation slot; 1412, second installation slot;

[0053] 20. Diaphragm belt;

[0054] 21. first end diaphragm band; 22. second end diaphragm band;

[0055] 201, first diaphragm belt; 202, second diaphragm belt;

[0056] 211, first diaphragm segment; 212, second diaphragm segment;

[0057] 30. Anode part;

[0058] 40. cathode portion; 41. cathode upper end cover; 42. cathode lower end cover;

[0059] 50. Heating unit. DETAILED DESCRIPTION

[0060] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0061] like Figures 1 to 6As shown, an embodiment of the present invention provides a magnetron structure, the magnetron structure includes a main body 10, the main body 10 has a receiving cavity 11; the main body 10 has a plurality of blades 12, the plurality of blades 12 are arranged around the receiving cavity 11 at intervals; the gap between two adjacent blades 12 forms a resonant cavity 13; the resonant cavity 13 is arranged in communication with the receiving cavity 11. The magnetron structure also includes a mounting groove 14 and a diaphragm belt 20, the mounting groove 14 is arranged on the plurality of blades 12 and is in communication with the resonant cavity 13 to form an annular groove; the diaphragm belt 20 is used to be arranged in the mounting groove 14. Among them, the mounting groove 14 includes a shallow groove section 1401 and a deep groove section 1402, along the extension direction of the receiving cavity 11, the depth of the deep groove section 1402 is greater than the depth of the shallow groove section 1401; the shallow groove section 1401 and the deep groove section 1402 are at least two, and the shallow groove section 1401 and the deep groove section 1402 are arranged alternately at intervals.

[0062] The magnetron structure provided by the embodiment of the present invention first enhances the mechanical strength of the mounting groove 14. The alternating arrangement of the deep and shallow groove sections not only increases the support points of the diaphragm belt 20, but also optimizes its force distribution and improves the mechanical strength. The deep groove section 1402 can provide a more stable support for the diaphragm belt 20, and the difference in depth design between the deep groove section 1402 and the shallow groove section 1401 helps to adjust the capacitance between the diaphragm belt 20 and the resonant cavity 13, thereby adjusting the equivalent impedance of the resonant cavity 13 and achieving better impedance matching. This can reduce the energy loss and reflection caused by impedance mismatch, improve the electromagnetic conversion efficiency of the magnetron, and optimize electromagnetic performance, such as frequency stability. Secondly, by alternately arranging the shallow groove section 1401 and the deep groove section 1402 in the mounting groove 14, the contact area between the diaphragm belt 20 and the fan blade portion 12 is increased, effectively improving the heat dissipation efficiency. When the magnetron is working, the deep groove section 1402 can provide a larger surface area, which is conducive to the rapid conduction and dissipation of heat, thereby reducing the operating temperature of the diaphragm belt 20 and improving its reliability under high-power pulse working conditions. The alternating distribution of the shallow groove section 1401 and the deep groove section 1402, as well as the cooperation between the diaphragm belt 20 and the mounting groove 14, work together to improve the stability of the magnetron structure. This design ensures that even under extreme working conditions of high power and high frequency, the various components of the magnetron can maintain a good relative position and cooperation state, reduce vibration and displacement, and extend the service life. Therefore, the magnetron structure provided by this embodiment can solve the technical problem of poor support stability of the structure used to support the diaphragm belt in the magnetron in the prior art.

[0063] Specifically, the magnetron structure is an S-band pulse magnetron.

[0064] Specifically, the diaphragm strip 20 is used to perform mode separation on the resonant cavity 13 when the electrons and the high-frequency field interact. The diaphragm strip 20 is arranged in the mounting groove 14 formed by the shallow groove section 1401 and the deep groove section 1402, which can more effectively achieve mode separation in the resonant cavity 13 and avoid interference between different modes, thereby ensuring that the output characteristics of the magnetron, such as power and frequency, are more stable and controllable.

[0065] Specifically, the shallow groove section 1401 is arranged on one of the two adjacent blade sections 12, and the deep groove section 1402 is arranged on the other of the two adjacent blade sections 12. With such a structural arrangement, the contact between the diaphragm belt 20 and the blade section 12 is more uniform, and the stability of the diaphragm belt 20 is enhanced. The alternating distribution of the shallow groove section 1401 and the deep groove section 1402 can optimize the stress distribution of the diaphragm belt 20 when it is subjected to force, avoid stress concentration, and thus effectively improve the mechanical strength of the diaphragm belt 20, making it more durable under high-power pulse working conditions.

[0066] In this embodiment, one end of the shallow groove section 1401 is connected to one of the two adjacent resonant cavities 13, and the other end of the shallow groove section 1401 is connected to the other of the two adjacent resonant cavities 13. In this way, the diaphragm strip 20 achieves effective mode separation of the resonant cavity 13, which helps to form a more stable electromagnetic mode.

[0067] In this embodiment, one end of the deep slot section 1402 is connected to one of the two adjacent resonant cavities 13, and the other end of the deep slot section 1402 is connected to the other of the two adjacent resonant cavities 13. In this way, the diaphragm strip 20 achieves effective mode separation of the resonant cavity 13, which helps to form a more stable electromagnetic mode.

[0068] Specifically, the depth of the deep groove section 1402 is greater than or equal to 2.5 mm and less than or equal to 3 mm. Such a structural setting helps to ensure that the diaphragm belt 20 is firmly supported in the deep groove section 1402. The selection of the depth range ensures sufficient contact area, thereby improving the mechanical strength and heat dissipation efficiency of the diaphragm belt 20. At the same time, limiting the depth range avoids the increase in manufacturing difficulty and the adverse effect on electromagnetic performance caused by excessive depth.

[0069] Specifically, the depth of the deep groove section 1402 is 2.8 mm. This specific depth is set based on theoretical calculations and simulation analysis, and can achieve the best balance between support and heat dissipation of the diaphragm belt 20. It not only ensures that the deep groove section 1402 effectively supports the diaphragm belt 20, but also improves the heat dissipation conditions by increasing the contact area, thereby improving the stability and reliability of the magnetron under high-power pulse working conditions.

[0070] Specifically, the depth of the shallow groove section 1401 is greater than or equal to 0.8 mm and less than or equal to 1.3 mm. With such a structural setting, the design depth of the shallow groove section 1401 is conducive to reducing unnecessary capacitance changes between the diaphragm belt 20 and the fan blade portion 12, avoiding interference of electromagnetic modes, while ensuring sufficient gap to ensure good electromagnetic performance and mode separation effect. The selection of this depth range also takes into account the structural strength and heat dissipation requirements.

[0071] Specifically, the depth of the shallow groove section 1401 is 1 mm. This depth is the optimal value obtained based on in-depth research and simulation analysis of the interaction between the diaphragm strip 20 and the resonant cavity 13. It can not only reduce the capacitance change and maintain the stability of the electromagnetic mode, but also ensure the reliable support of the diaphragm strip 20 in the shallow groove section 1401, avoid excessive mechanical deformation, and improve the performance and reliability of the magnetron when working at high frequencies.

[0072] Specifically, the width of the deep groove section 1402 or the shallow groove section 1401 is greater than or equal to 1 mm and less than or equal to 2 mm. With such a structural setting, the width range setting ensures good electromagnetic energy transmission, while optimizing the contact between the diaphragm belt 20 and the fan blade portion 12, effectively improving the heat dissipation efficiency. The reasonable selection of width also takes into account the mechanical strength, avoiding material waste caused by too wide and insufficient support caused by too narrow.

[0073] Specifically, the width of the deep groove section 1402 is 1.5 mm, or the width of the shallow groove section 1401 is 1.5 mm. The selection of this specific width is determined after considering the electromagnetic performance, mechanical strength and heat dissipation performance of the diaphragm belt 20. When the width is 1.5 mm, it not only ensures good electrical contact and mechanical connection between the diaphragm belt 20 and the fan blade portion 12, but also provides a sufficient heat dissipation path, and also controls the capacitance change through the optimized width, thereby improving the performance of the magnetron as a whole.

[0074] It should be noted that the depth of the deep groove section 1402 is the depth of the deep groove section 1402 along the extension direction of the accommodating cavity 11. The depth of the shallow groove section 1401 is the depth of the shallow groove section 1401 along the extension direction of the accommodating cavity 11. The width of the deep groove section 1402 is the width of the deep groove section 1402 along the radial direction of the main body 10. The width of the shallow groove section 1401 is the width of the shallow groove section 1401 along the radial direction of the main body 10.

[0075] In this embodiment, there are at least two mounting grooves 14, one of the at least two mounting grooves 14 is a first mounting groove 1411, and the other is a second mounting groove 1412, and the first mounting groove 1411 is located on the side of the second mounting groove 1412 away from the accommodating cavity 11. Among them, the shallow groove section 1401 of the first mounting groove 1411 and the shallow groove section 1401 of the second mounting groove 1412 are staggered. With such a structural setting, the support and contact points of the diaphragm belt 20 in different mounting grooves 14 can be more evenly distributed, avoiding local stress concentration caused by overlapping grooves. The staggered shallow groove section 1401 helps to form a more stable support structure for the diaphragm belt 20, reduce the vibration of the diaphragm belt 20 under high frequency and high power conditions, thereby improving the frequency stability of the magnetron and the reliability of the output power.

[0076] In this embodiment, there are at least two mounting grooves 14, one of the at least two mounting grooves 14 is a first mounting groove 1411, and the other is a second mounting groove 1412, and the first mounting groove 1411 is located on the side of the second mounting groove 1412 away from the accommodating cavity 11. Among them, the deep groove section 1402 of the first mounting groove 1411 and the deep groove section 1402 of the second mounting groove 1412 are staggered. With such a structural setting, the staggered design of the deep groove section 1402 further enhances the heat dissipation performance and mechanical strength of the diaphragm belt 20. Since the deep groove section 1402 provides a larger surface area and contact area, the staggered distribution of each deep groove section 1402 can ensure uniform distribution of heat energy on the diaphragm belt 20, avoid local overheating, and reduce the damage of thermal stress to the diaphragm belt 20. At the same time, the staggered design reduces the interference of the deep groove section 1402 on the electromagnetic mode, ensures the effective transmission of electromagnetic energy, and improves the overall performance of the magnetron.

[0077] Specifically, the spacing between the first mounting groove 1411 and the second mounting groove 1412 is greater than or equal to 1.8 mm and less than or equal to 2.5 mm. With such a structural setting, the electromagnetic performance and mechanical performance of the diaphragm belt 20 can be better balanced. A certain spacing can reduce the interference of electromagnetic modes between the diaphragm belts 20 and improve frequency stability; and limiting it within a certain range is to take into account the compactness of the structure and avoid excessive spacing that leads to a decrease in the overall structural efficiency. This helps to optimize the internal space of the magnetron, ensure efficient energy conversion, and maintain the compactness of the structure.

[0078] Specifically, the spacing between the first mounting groove 1411 and the second mounting groove 1412 is 2.1 mm. In this way, while ensuring the electromagnetic isolation between the diaphragm strips 20, the heat dissipation effect can be maximized, and the performance fluctuation caused by temperature changes can be reduced. At the same time, it is also beneficial to maintain the structural strength, prevent deformation or damage under long-term high-power operation, and ensure the stability and reliability of the magnetron.

[0079] Specifically, along the circumferential direction of the first mounting groove 1411, the first mounting groove 1411 and the second mounting groove 1412 are arranged at equal intervals. With such a structural setting, the design of equal spacing distribution can ensure uniform support of the diaphragm belt 20 in the circumferential direction, avoiding material fatigue or fracture caused by excessive local stress. At the same time, the uniform distribution also helps to form a stable electromagnetic environment, reduce crosstalk between modes, and improve the frequency stability of the magnetron and the consistency of power output.

[0080] Specifically, there are at least two diaphragm belts 20, one of the at least two diaphragm belts 20 is a first diaphragm belt 201, and the other is a second diaphragm belt 202. The first diaphragm belt 201 is used to be arranged in the first installation groove 1411, and the second diaphragm belt 202 is used to be arranged in the second installation groove 1412. With such a structural arrangement, the power capacity and frequency stability of the magnetron can be further enhanced. Each diaphragm belt 20 is arranged in a different installation groove 14, which helps to more accurately control the electromagnetic mode and achieve more efficient energy conversion. At the same time, the use of multiple diaphragm belts 20 can disperse the load, reduce the stress borne by a single diaphragm belt 20, and improve the stability and reliability of the overall structure, thereby extending the service life of the magnetron.

[0081] In this embodiment, the diaphragm belt 20 includes at least two first diaphragm segments 211 and at least two second diaphragm segments 212, and the first diaphragm segments 211 and the second diaphragm segments 212 are alternately connected. One side of the first diaphragm segment 211 is flush with one side of the second diaphragm segment 212, and the other side of the first diaphragm segment 211 protrudes from the other side of the second diaphragm segment 212. With such a structural arrangement, the diaphragm belt 20 has an alternating geometric shape, which increases the surface area and thus improves the heat dissipation performance. The protruding structure can expand the contact area with the fan blade portion 12 without adding too much material and weight, which helps to evenly distribute and quickly conduct heat, reduce the temperature of the diaphragm belt 20, and reduce thermal stress damage. At the same time, this geometric change can reduce stress concentration, improve the mechanical strength and reliability of the diaphragm belt 20, and extend the service life of the magnetron.

[0082] In this embodiment, the diaphragm belt 20 includes at least two first diaphragm segments 211 and at least two second diaphragm segments 212, and the first diaphragm segments 211 and the second diaphragm segments 212 are alternately connected. Among them, the first diaphragm segment 211 and the deep groove segment 1402 are gap-matched; at least part of the second diaphragm segment 212 and the shallow groove segment 1401 are gap-matched. With such a structural setting, this matching mode further optimizes the support and electromagnetic performance of the diaphragm belt 20. The deep groove segment 1402 can provide a stable mechanical support for the first diaphragm segment 211, and enhance its anti-deformation and anti-fracture capabilities. The gap matching between the second diaphragm segment 212 and the shallow groove segment 1401 reduces unnecessary capacitance changes, maintains the stability of the electromagnetic mode, and ensures the continuity of the heat dissipation path, thereby improving the thermal stability of the diaphragm belt 20. This design can also promote electrical contact between the diaphragm belt 20 and the mounting groove 14, achieve better impedance matching, and improve electromagnetic conversion efficiency.

[0083] Specifically, the resonant cavity 13 includes a first cavity section 131 and a second cavity section 132 which are connected to each other, and the first cavity section 131 is located on a side of the second cavity section 132 away from the accommodating cavity 11. In the radial direction of the main body 10, the cross-section of the first cavity section 131 is arc-shaped. With such a structural setting, the electromagnetic field distribution of the resonant cavity 13 is optimized. The arc-shaped cross-section helps to form a uniform electromagnetic field, reduce coupling and crosstalk between modes, and improve the frequency stability and power output consistency of the magnetron. In addition, the arc-shaped structure can also disperse the stress in the cavity, improve the mechanical strength of the resonant cavity 13, and reduce wear and damage during long-term use, thereby ensuring the high reliability of the magnetron.

[0084] Specifically, the resonant cavity 13 includes a first cavity segment 131 and a second cavity segment 132 which are connected to each other, and the first cavity segment 131 is located on a side of the second cavity segment 132 away from the accommodating cavity 11. Among them, along the radial direction of the main body 10, the second cavity segment 132 is an equal-width structure. With such a structural setting, the equal-width design ensures the stable transmission of electromagnetic waves in the second cavity segment 132, and avoids impedance mismatch caused by width changes. This helps to improve the conversion efficiency of electromagnetic energy, reduce energy loss, and increase the output power of the magnetron. At the same time, the equal-width structure also facilitates the installation and fixation of the diaphragm belt 20, reduces the manufacturing difficulty and cost, improves assembly efficiency and consistency, and further ensures the stability and reliability of the magnetron.

[0085] Specifically, the resonant cavity 13 includes a first cavity segment 131 and a second cavity segment 132 which are connected to each other, and the first cavity segment 131 is located on a side of the second cavity segment 132 away from the accommodating cavity 11. Among them, the mounting groove 14 is arranged relative to the second cavity segment 132. Specifically, the mounting groove 14 is arranged on the portion of the fan blade portion 12 used to form the second cavity segment 132. With such a structural arrangement, the separation and control of the electromagnetic mode are optimized. The relative arrangement of the mounting groove 14 and the second cavity segment 132 helps the diaphragm belt 20 to form a more effective mode separation in the electromagnetic field, avoids unnecessary leakage of electromagnetic energy between cavity segments, and improves frequency selectivity and stability. In addition, this arrangement also helps the diaphragm belt 20 to fit closely with the fan blade portion 12, ensures good mechanical connection and electromagnetic performance, and enhances the overall structural strength and thermal stability of the magnetron.

[0086] Specifically, there are at least two mounting grooves 14, one of the at least two mounting grooves 14 is located at one end of the main body 10, and the other is located at the other end of the main body 10; there are at least two diaphragm belts 20, one of the at least two diaphragm belts 20 is used to be set in one of the at least two mounting grooves 14, and the other is used to be set in the other of the at least two mounting grooves 14. With such a structural setting, this double-end symmetrical design can balance the electromagnetic field distribution inside the magnetron, keep the electromagnetic environment on both sides of the diaphragm belt 20 similar, thereby improving the frequency stability and the consistency of power output. At the same time, the diaphragm belts 20 at both ends work simultaneously, which can disperse the electromagnetic force and mechanical stress, reduce the load of a single diaphragm belt 20, improve the mechanical strength and stability of the diaphragm belt 20 and the entire magnetron, and extend the service life. The double-end setting is also conducive to the uniform distribution of thermal energy, avoids local overheating, and enhances the heat dissipation performance of the magnetron.

[0087] Specifically, at least two mounting grooves 14 include a first end mounting groove 141 and a second end mounting groove 142, wherein the first end mounting groove 141 is located at one end of the main body 10, and the second end mounting groove 142 is located at the other end of the main body 10. At least two diaphragm bands 20 include a first end diaphragm band 21 and a second end diaphragm band 22, wherein the first end diaphragm band 21 is used to be disposed in the first end mounting groove 141, and the second end diaphragm band 22 is used to be disposed in the second end mounting groove 142.

[0088] Specifically, the width of the diaphragm belt 20 remains unchanged along the circumferential direction of the mounting groove 14. Such a structural setting ensures the uniformity of the diaphragm belt 20 in the circumferential direction, avoids the unevenness of the local electromagnetic field caused by the width change, thereby reducing the crosstalk between modes and improving the frequency stability and power output consistency of the magnetron. The constant width is also conducive to maintaining the mechanical strength of the diaphragm belt 20, reducing stress concentration, and improving the reliability of the overall structure.

[0089] Specifically, along the radial direction of the main body 10, the width of the diaphragm strip 20 is determined according to the capacitance of the resonant cavity 13 and the frequency separation of the diaphragm strip 20; wherein, according to the formula Calculate the frequency separation, where C s =C ∑ -C r ; C ∑ is the total capacitance of the multiple resonant cavities 13, C r is the capacitance of the resonant cavity 13, C s is the capacitance of the diaphragm strip 20, is the width of the diaphragm band 20 in the radial direction of the main body 10, Δω is the angular frequency of the π mode and the adjacent The difference in mode angular frequency, N is the number of resonant cavities 13, ω x is the π mode angular frequency, λ x is the π mode resonance wavelength. With such a structural setting, based on the width optimization of electromagnetic parameters, better impedance matching can be achieved, the conversion efficiency of electromagnetic energy can be improved, energy loss can be reduced, and the output power of the magnetron can be increased. At the same time, the optimized design based on the frequency separation degree can help to control the electromagnetic mode more accurately, reduce unnecessary electromagnetic interference, and ensure the stability and reliability of the magnetron in the S-band pulse working mode.

[0090] Specifically, with respect to the setting of the diaphragm belt 20, the design steps of the diaphragm belt 20 in this embodiment include: Step 1, in-depth analysis of the problems existing in the existing diaphragm belt 20, clarifying the specific manifestations and influencing factors of poor reliability, stability and mechanical strength, and determining the direction and focus of improvement. Step 2, optimizing the size of the diaphragm belt 20 by combining theoretical calculation with simulation analysis. Accurately determine its width and thickness. While ensuring power capacity and frequency stability, reasonably adjusting the thickness can enhance its anti-deformation ability. Optimizing the length and width can improve the stress distribution and improve the mechanical strength of the diaphragm belt 20. Step 3, innovative shape design of the diaphragm belt 20. The resonant cavity 13 adopts an alternating annular groove structure to increase the surface area and improve the heat dissipation performance, thereby reducing the impact of temperature changes on performance, enhancing stability, and improving mechanical strength. Step 4, designing a multilayer structure. Considering the requirements of the equivalent impedance of the resonant cavity 13, the annular grooves are set to be equally spaced at both ends to achieve better impedance matching and improve the overall performance of the magnetron. Step 5, strict experimental verification. The optimized diaphragm belt 20 samples were made and fully tested in actual S-band pulse magnetrons to evaluate their performance indicators in terms of power capacity, frequency stability, reliability and mechanical strength. Adjustments and optimizations were made based on the experimental results to determine the final diaphragm belt 20 design.

[0091] Specifically, in the simulation stage, the diaphragm belt 20 and the main body 10 are both made of PEC (polyethylene chlorinated) material.

[0092] Specifically, the mounting groove 14 is disposed at the end of the main body 10. With such a structural arrangement, the diaphragm strip 20 can more effectively perform mode separation on the resonant cavity 13 when electrons and high-frequency fields interact with each other.

[0093] Specifically, the magnetron structure further includes an anode portion 30 , which is disposed on the blade portion 12 and located on a side of the blade portion 12 facing the accommodating cavity 11 , and the mounting groove 14 is spaced apart from the anode portion 30 .

[0094] Specifically, the magnetron structure further includes a cathode portion 40 , which is disposed in the accommodating cavity 11 and spaced apart from the main body 10 ; both ends of the cathode portion 40 extend out of the accommodating cavity 11 .

[0095] Specifically, the magnetron structure further includes a cathode upper end cover 41 and a cathode lower end cover 42, which are respectively located at two ends of the cathode part 40. The magnetron structure further includes a heating part 50. The heating part 50 is connected to the cathode lower end cover 42 and is located on a side of the cathode lower end cover 42 away from the cathode part 40. The heating part 50 is used to heat the cathode part 40.

[0096] Specifically, the heating part 50 is a heating wire.

[0097] like Figure 6 As shown, the working principle of the resonant cavity 13 and the diaphragm belt 20 in the magnetron structure is as follows: the heating part 50 is powered on to heat the cathode part 40 to a level sufficient to release electrons. After the cathode part 40 is heated to the operating temperature, electrons begin to escape from the surface of the cathode part 40. The electrons are accelerated under the action of the electric field and move toward the anode part 30. The electrons perform cycloid motion in the interaction area between the cathode part 40 and the anode part 30, that is, the electromagnetic force exerted on the electrons causes them to swing back and forth along the surface of the anode part 30. The diaphragm belt 20 plays a key mode separation role in the resonant cavity 13. Through its unique alternating annular groove design, different electromagnetic modes are separated, ensuring that the S-band pulse magnetron can stably and efficiently generate the required electromagnetic wave frequency. In the area between the cathode part 40 and the anode part 30, the high-frequency electromagnetic field interacts with the electrons performing cycloid motion, and the electron energy is transferred to the electromagnetic field, thereby generating high-frequency electromagnetic waves. These electromagnetic waves achieve the power output of the magnetron through the electromagnetic mode conversion of the resonant cavity 13.

[0098] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: adopting an alternating annular groove structure to increase the contact area between the resonant cavity support part and the diaphragm strip, thereby improving the mechanical strength; determining the optimal diaphragm strip width and thickness, thereby improving the power capacity and frequency stability; the design of double-end double-ring alternating annular grooves achieves better electromagnetic performance and mechanical strength.

[0099] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0100] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0101] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0102] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0103] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0104] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A magnetron structure, characterized in that: include: A main body (10), the main body (10) having a receiving cavity (11); the main body (10) having a plurality of blades (12), the plurality of blades (12) being arranged at intervals around the receiving cavity (11); a gap between two adjacent blades (12) forming a resonant cavity (13); the resonant cavity (13) being arranged in communication with the receiving cavity (11); A mounting groove (14) and a diaphragm belt (20), wherein the mounting groove (14) is arranged on the plurality of blade portions (12) and is in communication with the resonance cavity (13) to form an annular groove; and the diaphragm belt (20) is used to be arranged in the mounting groove (14); Wherein, the mounting groove (14) comprises a shallow groove section (1401) and a deep groove section (1402); along the extension direction of the accommodating cavity (11), the depth of the deep groove section (1402) is greater than the depth of the shallow groove section (1401); there are at least two shallow groove sections (1401) and at least two deep groove sections (1402), and the shallow groove sections (1401) and the deep groove sections (1402) are arranged alternately.

2. The magnetron structure according to claim 1, characterized in that: The shallow groove section (1401) is arranged on one of the two adjacent blade sections (12), and the deep groove section (1402) is arranged on the other of the two adjacent blade sections (12); and / or, One end of the shallow groove section (1401) is connected to one of the two adjacent resonant cavities (13), and the other end of the shallow groove section (1401) is connected to the other of the two adjacent resonant cavities (13); and / or, One end of the deep slot section (1402) is connected to one of the two adjacent resonant cavities (13), and the other end of the deep slot section (1402) is connected to the other of the two adjacent resonant cavities (13).

3. The magnetron structure according to claim 1, characterized in that: The depth of the deep groove section (1402) is greater than or equal to 2.5 mm and less than or equal to 3 mm; and / or, The depth of the shallow groove section (1401) is greater than or equal to 0.8 mm and less than or equal to 1.3 mm; and / or, The width of the deep groove section (1402) or the shallow groove section (1401) is greater than or equal to 1 mm and less than or equal to 2 mm.

4. The magnetron structure according to claim 1, characterized in that: There are at least two mounting grooves (14), one of the at least two mounting grooves (14) is a first mounting groove (1411) and the other is a second mounting groove (1412), and the first mounting groove (1411) is located on a side of the second mounting groove (1412) away from the accommodating cavity (11); Wherein, the shallow groove section (1401) of the first installation groove (1411) and the shallow groove section (1401) of the second installation groove (1412) are staggered; and / or, The deep groove section (1402) of the first installation groove (1411) and the deep groove section (1402) of the second installation groove (1412) are arranged in a staggered manner.

5. The magnetron structure according to claim 4, characterized in that: The distance between the first mounting groove (1411) and the second mounting groove (1412) is greater than or equal to 1.8 mm and less than or equal to 2.5 mm; and / or, Along the circumferential direction of the first mounting groove (1411), the first mounting groove (1411) and the second mounting groove (1412) are arranged at equal intervals.

6. The magnetron structure according to claim 4, characterized in that: There are at least two diaphragm belts (20), one of the at least two diaphragm belts (20) is a first diaphragm belt (201), and the other is a second diaphragm belt (202), the first diaphragm belt (201) is used to be set in the first installation groove (1411), and the second diaphragm belt (202) is used to be set in the second installation groove (1412).

7. The magnetron structure according to claim 1, characterized in that: The diaphragm belt (20) comprises at least two first diaphragm segments (211) and at least two second diaphragm segments (212), wherein the first diaphragm segments (211) and the second diaphragm segments (212) are alternately connected and arranged; Wherein, one side of the first diaphragm segment (211) is arranged flush with one side of the second diaphragm segment (212), and the other side of the first diaphragm segment (211) protrudes from the other side of the second diaphragm segment (212); and / or, The first diaphragm segment (211) and the deep groove segment (1402) are clearance-fitted; at least a portion of the second diaphragm segment (212) and the shallow groove segment (1401) are clearance-fitted.

8. The magnetron structure according to claim 1, characterized in that: The resonant cavity (13) comprises a first cavity section (131) and a second cavity section (132) which are connected to each other, wherein the first cavity section (131) is located on a side of the second cavity section (132) away from the accommodating cavity (11); Wherein, along the radial direction of the main body (10), the cross section of the first cavity section (131) is an arc shape; and / or, Along the radial direction of the main body (10), the second cavity section (132) is a structure of equal width; and / or, The mounting groove (14) is arranged opposite to the second cavity section (132).

9. The magnetron structure according to claim 1, characterized in that: There are at least two mounting grooves (14), one of the at least two mounting grooves (14) is located at one end of the main body (10), and the other is located at the other end of the main body (10); there are at least two diaphragm bands (20), one of the at least two diaphragm bands (20) is used to be arranged in one of the at least two mounting grooves (14), and the other is used to be arranged in the other of the at least two mounting grooves (14); and / or, Along the circumferential direction of the mounting groove (14), the width of the diaphragm band (20) remains constant; and / or, Along the radial direction of the main body (10), the width of the diaphragm strip (20) is determined according to the capacitance of the resonant cavity (13) and the frequency separation of the diaphragm strip (20); Among them, according to the formula Calculate the frequency separation, where C s =C ∑ -C r ; C ∑ is the total capacitance of the plurality of resonant cavities (13), C r is the capacitance of the resonant cavity (13), C s is the capacitance of the diaphragm strip (20), is the width of the diaphragm band (20) in the radial direction of the main body (10), Δω is the angular frequency of the π mode and the adjacent The difference in mode angular frequency, N is the number of the resonant cavities (13), ω x is the π mode angular frequency, λ x is the π mode resonance wavelength.

10. The magnetron structure according to claim 1, characterized in that: The mounting groove (14) is arranged at an end of the main body (10); and / or, The magnetron structure further comprises an anode portion (30), the anode portion (30) being arranged on the fan blade portion (12) and located on a side of the fan blade portion (12) facing the accommodating cavity (11), the mounting groove (14) being arranged at a distance from the anode portion (30); and / or, The magnetron structure further comprises a cathode portion (40), wherein the cathode portion (40) is arranged in the accommodating cavity (11) and is spaced apart from the main body portion (10); both ends of the cathode portion (40) are arranged to extend out of the accommodating cavity (11).

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