Electron gun frame and space traveling wave tube

Abstract

The present invention relates to the technical field of vacuum electronic devices, and provides an electron gun frame, comprising an insulating porcelain seat, a first anode seat and a second anode seat arranged on the insulating porcelain seat, and a positioning member for fixing the first anode seat and the second anode seat, wherein the insulating porcelain seat comprises an insulating porcelain ring, and at least two positioning block groups evenly distributed along the circumference of the top surface of the insulating porcelain ring, each positioning block group comprises a first positioning block, a second positioning block and a third positioning block, the first positioning block, the second positioning block and the third positioning block are arranged in sequence and equidistantly, the setting heights of the first positioning block, the second positioning block and the third positioning block are successively larger, and each of the first positioning block, the second positioning block and the third positioning block is fixedly connected to the first anode seat, the second anode seat and the positioning member respectively by a clamping method. The present invention solves the technical problem that the miniaturized traveling wave tube in the prior art cannot meet the requirements in terms of weight reduction, processing, assembly and precision.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum electronic devices, and in particular to an electron gun frame and a space traveling wave tube. Background Art

[0002] The traveling wave tube is one of the important members of the microwave vacuum device family. It is a device that amplifies electromagnetic waves by using the interaction between electromagnetic waves and electron beams in the interaction zone of the traveling wave tube. The traveling wave tube generally includes five parts: electron gun, magnetic focusing system, slow wave structure, energy transmission coupling structure, and single-stage or multi-stage step-down collector.

[0003] As a power amplifier device, the basic principle of the traveling wave tube is to reduce the phase velocity of electromagnetic waves through a high-frequency slow-wave system, so that it interacts synchronously with the electron beam and converts the energy of the electron beam into microwave energy. The electrons emitted from the cathode are accelerated and compressed into an electron beam in the electron gun, and maintained into a thin electron beam by a periodic magnetic focusing system, passing through the helical high-frequency system; the electron kinetic energy is converted into microwave energy in the high-frequency system, so that the signal is amplified; the amplified microwave enters the antenna transmission system through the energy transmission coupling system; the electron beam that has handed over part of its energy finally enters the multi-stage step-down collector, is decelerated before reaching the collector electrode, and part of its energy is recovered; the remaining electron energy is converted into heat energy in the collector.

[0004] As a very important microwave power device, the traveling wave tube is widely used in electronic countermeasures, electronic warfare, radar, meteorological observation, space measurement, satellite communications and other fields because of its wide operating frequency of a single device (it can easily obtain a bandwidth of several octaves, which is suitable for use in electronic warfare), large output power and high efficiency. Different application fields have different requirements for devices such as traveling wave tubes. However, in general, traveling wave tubes with higher power and higher efficiency are common requirements for various applications, especially for space traveling wave tubes for space measurement and satellite communications. In recent years, there has been a demand for miniaturization of traveling wave tubes, and it has quickly reached a practical level. While miniaturization of traveling wave tubes, higher requirements have been placed on weight reduction, processing, assembly and precision, and traveling wave tubes with existing structures are far from meeting the above requirements. Summary of the invention

[0005] The object of the present invention is to provide an electron gun frame and a space traveling wave tube, aiming to solve the technical problem that the miniaturized traveling wave tube in the prior art cannot meet the requirements in terms of weight reduction, processing, assembly and precision.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an electron gun frame, comprising an insulating porcelain seat, a first anode seat and a second anode seat arranged on the insulating porcelain seat, and a positioning member for fixing the first anode seat and the second anode seat, the insulating porcelain seat comprising an insulating porcelain ring, and at least two groups of positioning block groups evenly distributed along the circumference of the top surface of the insulating porcelain ring, each group of positioning block groups comprising a first positioning block for fixing the first anode seat, a second positioning block for fixing the second anode seat and a third positioning block for fixing to the positioning member, the first positioning blocks, the second positioning blocks and the third positioning blocks in each group of positioning block groups are arranged in sequence and equidistantly, the setting heights of the first positioning blocks, the second positioning blocks and the third positioning blocks in each group of positioning block groups are successively increased, and each of the first positioning blocks, the second positioning blocks and the third positioning blocks are fixedly connected to the first anode seat, the second anode seat and the positioning member by a clamping method.

[0007] Furthermore, the first anode seat is provided with a first connecting hole into which the first positioning block can be inserted, and the first connecting hole is provided with a first elastic opening that passes through to the outside; the second anode seat is provided with a second connecting hole into which the second positioning block can be inserted, and the second connecting hole is provided with a second elastic opening that passes through to the outside; the third anode seat is provided with a third connecting hole into which the third positioning block can be inserted, and the third connecting hole is provided with a third elastic opening that passes through to the outside.

[0008] Furthermore, the outer wall of the first positioning block is provided with a concave first guide surface, and the first guide surface faces the first elastic opening; the outer wall of the second positioning block is provided with a concave second guide surface, and the second guide surface faces the second elastic opening; the outer wall of the third positioning block is provided with a concave third guide surface, and the third guide surface faces the third elastic opening.

[0009] Furthermore, the first positioning block is arranged on the top surface of the insulating ceramic ring, the second positioning block is arranged on the top surface of a first ceramic column, the third positioning block is arranged on the top surface of a second ceramic column, and the height of the first ceramic column is smaller than the height of the second ceramic column.

[0010] Furthermore, a groove structure is provided on the outer wall surface of the first ceramic column and the outer wall surface of the second ceramic column.

[0011] Further, the positioning block groups are divided into three groups, and the three first positioning blocks in the three groups of the positioning block groups are connected to form an equilateral triangle, and the first anode seat is provided with three first connecting blocks corresponding to the three first positioning blocks respectively, and the three first connecting holes are respectively provided on the three first connecting blocks; the three second positioning blocks in the three groups of the positioning block groups are connected to form an equilateral triangle, and the second anode seat is provided with three second connecting blocks corresponding to the three second positioning blocks respectively, and the three second connecting holes are respectively provided on the three second connecting blocks; the three third positioning blocks in the three groups of the positioning block groups are connected to form an equilateral triangle, and the positioning piece is provided with three third connecting blocks corresponding to the three third positioning blocks respectively, and the three third connecting holes are respectively provided on the three third connecting blocks.

[0012] Furthermore, the first anode seat includes an anode plate stacked on an insulating porcelain ring, and the three first connecting blocks are evenly distributed on the edge of the anode plate; the second anode seat includes an anode body stacked on the anode plate, and the three second connecting blocks are evenly distributed on the edge of the anode body; the positioning member includes a positioning ring stacked on the anode body, and the three third connecting blocks are evenly distributed on the edge of the positioning ring.

[0013] Furthermore, the anode plate is in a disc shape.

[0014] Furthermore, the anode body is cylindrical.

[0015] The present invention also provides a space traveling wave tube, comprising an electron gun frame, wherein the electron gun frame is the above-mentioned electron gun frame.

[0016] Beneficial effects of the present invention:

[0017] In the present invention, positioning blocks of different heights are used to fix the first anode seat, the second anode seat and the positioning block respectively, which not only increases the insulation performance between the first anode seat and the second anode seat, and between the first anode seat, the second anode seat and the ground, but also improves the parallelism and concentricity of the electron gun, while achieving light weight and meeting the demand for miniaturization of vacuum devices; and the assembly is carried out in a clamping manner, which has a simpler process and higher assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1A schematic structural diagram of an electron gun frame provided in Embodiment 1 of the present invention;

[0020] Figure 2 An exploded schematic diagram of an electron gun frame provided in Embodiment 1 of the present invention;

[0021] 10-insulating porcelain seat; 11-insulating porcelain ring; 12-positioning block group; 121-first positioning block; 122-second positioning block; 123-third positioning block; 124-first guide surface; 126-second guide surface; 128-third guide surface; 13-first ceramic column; 14-second ceramic column; 15-groove structure; 20-first anode seat; 21-anode plate; 22-first connecting block; 23-first connecting hole; 24-first elastic opening; 30-second anode seat; 31-anode body; 32-second connecting block; 33-second connecting hole; 34-second elastic opening; 40-positioning piece; 41-positioning ring; 42-third connecting block; 43-third connecting hole; 44-third elastic opening. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and 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, and therefore cannot be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Please refer to Figure 1 , Figure 2 The electron gun frame provided by the present invention comprises an insulating porcelain seat 10, a first anode seat 20 and a second anode seat 30 arranged on the insulating porcelain seat 10, and a positioning member 40 for fixing the first anode seat 20 and the second anode seat 30, wherein the insulating porcelain seat 10 comprises an insulating porcelain ring 11, and at least two groups of positioning block groups 12 uniformly distributed along the circumference of the top surface of the insulating porcelain ring 11, each group of positioning block groups 12 comprises a first positioning block 121 for fixing the first anode seat 20, a second positioning block 122 for fixing the second anode seat 30, and The third positioning block 123 is used to be fixed to the positioning member 40. The first positioning block 121, the second positioning block 122 and the third positioning block 123 in each positioning block group 12 are arranged in sequence and equidistantly. The setting heights of the first positioning block 121, the second positioning block 122 and the third positioning block 123 in each positioning block group 12 are increased in sequence. Each first positioning block 121, the second positioning block 122 and the third positioning block 123 are fixedly connected to the first anode seat 20, the second anode seat 30 and the positioning member 40 by a snap-on method.

[0027] In the embodiment of the present invention, positioning blocks of different heights are used to respectively fix the first anode seat 20, the second anode seat 30 and the positioning block, which not only increases the insulation performance between the first anode seat 20 and the second anode seat 30, and between the first anode seat 20, the second anode seat 30 and the ground, but also improves the parallelism and concentricity of the electron gun, while achieving light weight and meeting the requirements of miniaturization of vacuum devices; and the assembly is assembled in a snap-on manner, which has a simpler process and higher assembly efficiency.

[0028] Specifically, in this embodiment, the material of the insulating porcelain ring 11 can be selected from one of BeO, Al2O395%, AlN or BN. Three groups of positioning block groups 12 are arranged on the insulating porcelain ring 11. The three groups of positioning block groups 12 are evenly distributed along the insulating porcelain ring 11, and each group of positioning block groups 12 includes a first positioning block 121, a second positioning block 122 and a third positioning block 123. The first positioning blocks 121, the second positioning blocks 122 and the third positioning blocks 123 in each group of positioning block groups 12 are arranged in the same order. In this way, the three groups of positioning block groups 12 include a total of three first positioning blocks 121, three second positioning blocks 122 and three third positioning blocks 123. Moreover, the connection line between the three first positioning blocks 121 is an equilateral triangle, the connection line between the three second positioning blocks 122 is an equilateral triangle, and the connection line between the three third positioning blocks 123 is also an equilateral triangle.

[0029] Moreover, each first positioning block 121 has an outer wall with an inwardly concave first guide surface 124 ; each second positioning block 122 has an outer wall with an inwardly concave second guide surface 126 ; each third positioning block 123 has an outer wall with an inwardly concave third guide surface 128 .

[0030] like Figure 2 As shown, the first anode seat 20, the second anode seat 30 and the positioning member 40 are sequentially stacked on the insulating ceramic ring 11 from bottom to top. Among them, the first anode seat 20 includes an anode plate 21 stacked on the insulating ceramic ring 11, the anode plate 21 is disc-shaped, and three first connecting blocks 22 are evenly distributed on the edge of the anode plate 21. A first connecting hole 23 is provided on each first connecting block 22, and each first connecting hole 23 corresponds to each first positioning block 121, so that the first positioning block 121 can be inserted into the first connecting hole 23. The first connecting hole 23 is provided with a first elastic opening 24 that penetrates to the outside, and the outer side wall of the first positioning block 121 is provided with an inwardly concave first guide surface 124 facing the first elastic opening 24. When the first connection hole 23 is slightly smaller, the first positioning block 121 and the first connection hole 23 are tightly fitted. At this time, the first elastic opening 24 provided enables the first connection hole 23 to have elastic opening and closing capabilities, which facilitates the first connection hole 23 to undergo slight elastic deformation when installing the first positioning block 121, thereby smoothly inserting the first positioning block 121. When the first connection hole 23 is set slightly larger, the first positioning block 121 and the first connection hole 23 do not require pre-tightening force during assembly. After the first positioning block 121 is successfully installed, the first elastic opening 24 of the first connection hole 23 deforms inwards and squeezes the first positioning block 121 under the interaction of forces, thereby preventing the first positioning block 121 from falling off. In both of the above cases, the first guide surface 124 plays a guiding role, which facilitates smoother installation of the first positioning block 121.

[0031] The second anode seat 30 includes an anode body 31 stacked on the anode plate 21, the anode body 31 is cylindrical, and three second connection blocks 32 are evenly distributed on the edge of the anode body 31. Each second connection block 32 is provided with a second connection hole 33, and each second connection hole 33 corresponds to each second positioning block 122. The second connection hole 33 is provided with a second elastic opening 34 that passes through to the outside, and the outer side wall of the second positioning block 121 is provided with a concave second guide surface 126 facing the second elastic opening 34. The functions of the second elastic opening 34 and the second guide surface 126 are the same as above, and will not be repeated here.

[0032] The anode plate 21 and the three first connection blocks 22 , the anode body 31 and the three second connection blocks 32 are all made of high-temperature molybdenum material.

[0033] The positioning member 40 is located at the top, and plays a protective and isolating role for the second anode seat 30. It includes a positioning ring 41 stacked on the anode body 31, and three third connecting blocks 42 are evenly distributed on the edge of the positioning ring 41. Each third connecting block 42 is provided with a third connecting hole 43, and each third connecting hole 43 corresponds to the third positioning block 123. The third connecting hole 43 is provided with a third elastic opening 44 that passes through to the outside, and the outer wall of the third positioning block 123 is provided with an inner concave third guide surface 128 facing the third elastic opening 44. The functions of the third elastic opening 44 and the third guide surface 128 are the same as above, and will not be repeated here. In this embodiment, the material of the positioning ring 41 and the three third connecting blocks 42 is one of 4J29, 4J33 or 4J34.

[0034] Moreover, in the above structure, the first anode seat 20, the second anode seat 30 and the positioning member 40 all adopt a structure of three connecting blocks, that is, a positioning plane is formed by a three-claw positioning structure, so that when the connecting holes on each connecting block cooperate with each positioning block, the two electrode seats and the positioning member 40 can be placed horizontally and can better cooperate with each positioning block. There is no need to use a mold to fix it during the subsequent clamping, which saves the cost of manufacturing the mold.

[0035] In this embodiment, the heights of the first positioning block 121, the second positioning block 122 and the third positioning block 123 are successively larger. The specific implementation method is: the first positioning block 121 is set on the top surface of the insulating ceramic ring 11, the second positioning block 122 is set on the top surface of a first ceramic column 13, and the third positioning block 123 is set on the top surface of a second ceramic column 14, and the height of the first ceramic column 13 is less than the height of the second ceramic column 14. In this way, the first positioning block 121 located at the lowest point corresponds to the first anode seat 20 fixed at the bottom, the second positioning block 122 located at the middle height corresponds to the second anode seat 30 fixed in the middle, and the highest third positioning block 123 corresponds to the positioning piece 40 fixed at the top. Of course, according to actual needs, the first positioning block 121 can also be set on the third ceramic column, as long as the height of the third ceramic column is less than the height of the first ceramic column 13.

[0036] In this embodiment, a groove structure 15 is provided on the outer wall surface of the first ceramic column 13 and the outer wall surface of the second ceramic column 14. The groove structure 15 is specifically a transverse groove arranged along the circumferential direction. Since the first ceramic column 13 is shorter, there is only one transverse groove, while the second ceramic column 14 is taller, and two transverse grooves are arranged at intervals. The number of transverse grooves can be increased or decreased according to actual conditions. By providing the above-mentioned groove structure 15, the creepage distance of the outer surface of the insulating ceramic base 10 is increased.

[0037] The embodiment of the present invention further provides a space traveling wave tube (not shown in the figure), which includes the above-mentioned electron gun frame. Due to the use of the above-mentioned electron gun frame, not only the insulation performance between the first anode seat 20 and the second anode seat 30, and between the first anode seat 20, the second anode seat 30 and the ground is increased, but also the parallelism and concentricity of the electron gun are improved, while achieving light weight, meeting the demand for miniaturization of the space traveling wave tube.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electron gun frame, comprising an insulating porcelain seat, a first anode seat and a second anode seat provided on the insulating porcelain seat, and a positioning member for fixing the first anode seat and the second anode seat, characterized in that: The insulating porcelain seat comprises an insulating porcelain ring, and at least two groups of positioning block groups uniformly distributed along the circumference of the top surface of the insulating porcelain ring. The first anode seat, the second anode seat and the positioning piece are sequentially stacked on the insulating porcelain ring from bottom to top. Each group of positioning block groups comprises a first positioning block for fixing the first anode seat, a second positioning block for fixing the second anode seat and a third positioning block for fixing the positioning piece. The first positioning block, the second positioning block and the third positioning block in each group of positioning block groups are arranged in sequence and equidistantly. The setting heights of the first positioning block, the second positioning block and the third positioning block in each group of positioning block groups are successively larger. Each of the first positioning block, the second positioning block and the third positioning block is fixedly connected to the first anode seat, the second anode seat and the positioning piece by a clamping method. The first anode seat is provided with a first connection hole into which the first positioning block can be inserted, and the first connection hole is provided with a first elastic opening that penetrates to the outside; the second anode seat is provided with a second connection hole into which the second positioning block can be inserted, and the second connection hole is provided with a second elastic opening that penetrates to the outside; the positioning member is provided with a third connection hole into which the third positioning block can be inserted, and the third connection hole is provided with a third elastic opening that penetrates to the outside; There are three groups of the positioning block groups, and the three first positioning blocks in the three groups of the positioning block groups are connected to form an equilateral triangle. The first anode seat is provided with three first connecting blocks corresponding to the three first positioning blocks respectively, and the three first connecting holes are respectively provided on the three first connecting blocks; the three second positioning blocks in the three groups of the positioning block groups are connected to form an equilateral triangle. The second anode seat is provided with three second connecting blocks corresponding to the three second positioning blocks respectively, and the three second connecting holes are respectively provided on the three second connecting blocks; the three third positioning blocks in the three groups of the positioning block groups are connected to form an equilateral triangle, and the positioning piece is provided with three third connecting blocks corresponding to the three third positioning blocks respectively, and the three third connecting holes are respectively provided on the three third connecting blocks.

2. The electron gun frame according to claim 1, characterized in that: The outer wall of the first positioning block is provided with a concave first guide surface, and the first guide surface faces the first elastic opening; the outer wall of the second positioning block is provided with a concave second guide surface, and the second guide surface faces the second elastic opening; the outer wall of the third positioning block is provided with a concave third guide surface, and the third guide surface faces the third elastic opening.

3. The electron gun frame according to claim 1, characterized in that: The first positioning block is arranged on the top surface of the insulating ceramic ring, the second positioning block is arranged on the top surface of a first ceramic column, the third positioning block is arranged on the top surface of a second ceramic column, and the height of the first ceramic column is smaller than the height of the second ceramic column.

4. The electron gun frame according to claim 3, characterized in that: A groove structure is provided on the outer wall surface of the first ceramic column and the outer wall surface of the second ceramic column.

5. The electron gun frame according to claim 1, characterized in that: The first anode seat includes an anode plate stacked on an insulating porcelain ring, and the three first connecting blocks are evenly distributed on the edge of the anode plate; the second anode seat includes an anode body stacked on the anode plate, and the three second connecting blocks are evenly distributed on the edge of the anode body; the positioning member includes a positioning ring stacked on the anode body, and the three third connecting blocks are evenly distributed on the edge of the positioning ring.

6. The electron gun frame according to claim 5, characterized in that: The anode plate is in a disc shape.

7. The electron gun frame according to claim 5, characterized in that: The anode body is cylindrical.

8. A space traveling wave tube, comprising an electron gun frame, characterized in that: The electron gun frame is the electron gun frame according to any one of claims 1 to 7.

Images