Getter storage structure for traveling wave tube

Abstract

The embodiment of the utility model discloses a getter storage structure for a traveling wave tube. The getter storage structure comprises a storage cylinder which is used for accommodating a getter and is provided with an opening at the top, the sealing cover, the insulating block and the conductive block are used for sealing the top opening of the storage cylinder; one end of the getter is connected with the inner wall of the storage cylinder, and the other end is connected with the bottom of the conductive block. In the storage structure, the number of assembly parts is reduced from original six to four, the structure is simpler, the size is reduced, compared with the prior art, the size is reduced to be within 50%, the redundant space of the traveling wave tube is greatly improved, part assembly can be completed only through four welding processes, the needed welding number is reduced by 1 / 3 compared with the original technical scheme, and the cost is reduced. The getter assembly difficulty is reduced, the assembly technological process is simplified, the gas leakage risk is reduced, the yield of the storage structure is improved, and the problems that a traditional getter storage structure is large in size, complex in part and assembly technology and the like are solved.

Description

Technical Field

[0001] The present application relates to the technical field of traveling wave tube degassing, and more specifically, to a degassing agent storage structure for a traveling wave tube. Background Art

[0002] A traveling wave tube is a power device that works in a vacuum state. It uses a high-energy electron beam to exchange energy with electromagnetic waves in a vacuum atmosphere to amplify the signal, so maintaining a vacuum environment inside the tube is crucial.

[0003] During operation, a traveling wave tube (TWT) continuously releases trace amounts of gas from its inner surfaces and internal components. This is especially true of electron gun components such as the cathode, filament, and anode. Operating temperatures reach hundreds or even thousands of degrees Celsius, making this outgassing more severe. The presence of gas within the TWT can affect the cathode electron beam emission, thereby compromising the tube's performance and shortening its lifespan.

[0004] A getter, an absorber made of a material with gettering properties, is often placed in areas of a traveling wave tube (TWT) where gas release is most prominent, such as the electron gun. The getter absorbs gases released by components during high-temperature operation, helping to maintain the vacuum inside the TWT and ensuring proper function.

[0005] In recent years, as traveling wave tubes have continued to develop towards miniaturization, high reliability and long life, the currently used traveling wave tube getter storage structure can no longer meet the current usage requirements.

[0006] The existing degassing agent storage structure is as follows Figure 2As shown, the sealing cover 2, the insulating block 3 and the conductive block 4 are arranged on the side of the storage cylinder 1. Since the diameter of the side opening of the storage cylinder 1 for connecting the sealing cover 2 is small, the getter cannot be placed into the inner cavity of the storage cylinder 1 through the opening on the side of the storage cylinder 1. In order to place the getter in the inner cavity of the storage cylinder 1, the top of the storage cylinder 1 must be open. In order to achieve the airtightness of the storage structure, the top opening of the storage cylinder 1 needs to be sealed by the annular disk 5 and the sealing cover 6. The outer diameters of the annular disk 5 and the sealing cover 6 are welded to ensure the airtightness of the storage structure as a whole. In actual applications, the temperature of the annular disk 5 and the sealing cover 6 during welding is very high. To prevent a large amount of heat from being transferred to the insulating block 3 and the conductive block 4, causing the solder between the insulating block 3 and the conductive block 4 and between the insulating block 3 and the sealing disk 2 to melt and leak at the sealed position, the outer diameters of the annular disk 5 and the sealing cover 6 must be much larger than the outer diameter of the storage tube 1. This results in a large volume of the overall degassing agent storage structure, with a height dimension of up to 10.2 mm and a maximum radial dimension of up to 21 mm, which greatly limits the space redundancy for the subsequent miniaturization and micro-production of the traveling wave tube. In addition, the storage structure in the prior art consists of six parts: the storage tube 1, the sealing cover 2, the insulating block 3, the conductive block 4, the annular disk 5, and the sealing cover 6. The assembly requires six welding processes, which is a relatively cumbersome process. There is also a certain risk of air leakage during welding, which can easily lead to the complete destruction of the entire traveling wave tube and reduce the yield rate. Utility Model Content

[0007] The purpose of the present utility model is to provide a getter storage structure for a traveling wave tube to solve at least one of the above technical problems.

[0008] In order to achieve at least one of the above objectives, the present application adopts the following technical solutions:

[0009] The present application provides a getter storage structure for a traveling wave tube, comprising

[0010] A storage cylinder with an open top for containing a getter;

[0011] A sealing cover, an insulating block and a conductive block are sequentially arranged to seal the open top of the storage cylinder;

[0012] One end of the getter is connected to the inner wall of the storage cylinder, and the other end is connected to the bottom of the conductive block.

[0013] Optionally, the bottom of the storage cylinder is open, and the outer periphery of the open bottom is welded to the traveling wave tube.

[0014] Optionally, the conductive block, the insulating block and the sealing cover are stacked in sequence from top to bottom.

[0015] Optionally, the sealing cover includes a first through hole, and the insulating block includes a second through hole;

[0016] The insulating block is used to block the first through hole, and the conductive block is used to block the second through hole.

[0017] Optionally, the first through hole is located at the center of the sealing cover;

[0018] The second through hole is located at the center of the insulating block.

[0019] Optionally, the storage cylinder, the sealing cover and the conductive block are all made of metal;

[0020] The insulating block is made of ceramic.

[0021] Optionally, the conductive block and the insulating block, and the insulating block and the sealing cover are sealed by brazing.

[0022] Optionally, the insulating block is welded to the sealing cover by silver-based solder, and the conductive block is welded to the insulating block by silver-based solder.

[0023] Optionally, the sealing cover and the storage cylinder are welded by argon arc welding, laser welding, or fusion welding.

[0024] Optionally, the diameter of the cross section of the storage cylinder is 10.2 mm to 10.4 mm.

[0025] The beneficial effects of this application are as follows:

[0026] To address the challenges of existing technologies, the present application proposes a getter storage structure for a traveling wave tube (TWT). The getter storage structure comprises only four components: a storage tube, a sealing cover, an insulating block, and a conductive block. The getter is placed into the inner cavity of the storage tube through the top opening. The sealing cover, insulating block, and conductive block are sealed to the top opening, eliminating the need for other components to seal the top of the storage tube. Furthermore, the placement of the sealing cover, insulating block, and conductive block on the top of the storage tube, as opposed to on the side, reduces the height and radial dimensions of the entire storage structure. Compared to the prior art, the storage structure provided by the present application reduces the number of assembled parts from six to four, resulting in a simpler structure and significantly reduced size. The overall height of the storage structure can reach 4.8 mm, and the maximum radial dimension can reach 10.3 mm, a reduction of less than 50% compared to the prior art. This storage structure significantly increases the redundant space available in the TWT, paving the way for future TWT miniaturization. By reducing the number of parts, the welding process steps are also reduced accordingly. Only four welding processes are required to complete the component assembly. The number of welding times required is reduced by 1 / 3 compared with the existing technical solutions, which reduces the assembly difficulty of the getter storage structure, simplifies the assembly process, reduces the risk of gas leakage, and improves the yield rate of the storage structure. It solves the problems of the traditional getter storage structure with large volume, complicated parts and cumbersome assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Figure 1 A schematic diagram of the overall structure of a getter storage structure for a traveling wave tube in one embodiment of the present application is shown.

[0029] Figure 2 The figure shows the overall structure of a getter storage structure for a traveling wave tube in the prior art. DETAILED DESCRIPTION

[0030] In the following description, for the purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may be practiced without these specific details.

[0031] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply 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 this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0032] It should also be noted that, in the description of the present application, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0033] In order to solve the problems existing in the prior art, an embodiment of the present application provides a getter storage structure for a traveling wave tube, such as Figure 1As shown, it includes a storage cylinder 10 with an open top for containing a degassing agent; a sealing cover 20, an insulating block 30, and a conductive block 40 arranged in sequence for sealing the open top of the storage cylinder 10; the diameter of the cross section of the storage cylinder 10 is 10.2mm to 10.4mm, that is, the radial diameter of the entire storage structure is 10.2mm to 10.4mm, preferably 10.3mm. The outer ring of the sealing cover 20 is welded to the top of the inner wall of the storage cylinder 10, and airtightness needs to be ensured during welding. Specifically, the sealing cover 20 and the storage cylinder 10 can be welded by argon arc welding, laser welding, or fusion welding, preferably argon arc welding. One end of the degassing agent is connected to the inner wall of the storage cylinder 10, and the other end is connected to the bottom of the conductive block 40. The storage tube 10, the sealing cover 20 and the conductive block 40 are all made of metal. Specifically, the material of the storage tube 10 includes but is not limited to nickel-copper alloy, the material of the sealing cover 20 includes but is not limited to iron-nickel-cobalt ceramic sealing alloy, and the material of the conductive block 40 includes but is not limited to iron-nickel-cobalt ceramic sealing alloy; the material of the insulating block 30 can be ceramic, and specifically the material of the insulating block 30 includes but is not limited to alumina ceramic. To activate the getter, a potential difference is required across its ends. The insulating block 30, positioned between the conductive block 40 and the sealing cover 20, insulates the conductive block 40 from the sealing cover 20 and the storage tube 10. Since one end of the getter is connected to the inner wall of the storage tube 10 and the other end is connected to the bottom of the conductive block 40, when a voltage is applied to the conductive block 40, the potential between the sealing cover 20 and the storage tube 10 is zero. This creates a voltage difference across the getter, activating the getter. During the actual activation process, after a certain voltage is applied to the getter, its overall temperature begins to rise. When the temperature reaches a point where the oxide layer on the getter's surface diffuses inward, exposing a fresh, active surface with strong gas absorption capacity, the getter is activated. The activation temperature of getters made of different materials varies, generally ranging from 400°C to 900°C. The voltage applied to the conductive block 40 is determined by the material of the getter and ranges from 1V to 5V. At this time, the insulating block 30 also needs to meet the withstand voltage requirement to prevent the insulating block 30 from being broken down so that there is no voltage difference between the storage tube 10 and the conductive block 40, or the voltage difference is too small to activate the getter.

[0034] In the above-described embodiment of the present application, the getter storage structure comprises only four components: a storage tube 10, a sealing cap 20, an insulating block 30, and a conductive block 40. The getter is placed into the inner cavity of the storage tube 10 through its top opening. Furthermore, the sealing cap 20, insulating block 30, and conductive block 40 are sealed to the top opening of the storage tube 10, eliminating the need for other components to seal the top of the storage tube 10. Furthermore, the placement of the sealing cap 20, insulating block 30, and conductive block 40 at the top of the storage tube 10, as opposed to on the side, reduces the height and radial dimensions of the entire storage structure. Compared to the prior art, the storage structure provided by the present application reduces the number of assembled parts from six to four, resulting in a simpler structure and significantly reduced volume. The overall height of the storage structure can reach 4.8 mm, and the maximum radial dimension can reach 10.3 mm, a reduction of less than 50% compared to the prior art. This storage structure significantly increases the redundant space available for traveling wave tubes (TWTs), facilitating the future miniaturization of TWTs. By reducing the number of parts, the welding process steps are also reduced accordingly. Only four welding processes are required to complete the component assembly. The number of welding times required is reduced by 1 / 3 compared with the existing technical solutions, which reduces the assembly difficulty of the getter storage structure, simplifies the assembly process, reduces the risk of gas leakage, and improves the yield rate of the storage structure. It solves the problems of the traditional getter storage structure with large volume, complicated parts and cumbersome assembly process.

[0035] It should be noted that although the getter storage structure provided in the present application has a smaller volume than that of the prior art, the amount of getter in the storage cylinder 10 is not reduced, and its gas absorbing effect is not reduced.

[0036] In one embodiment, the bottom of the storage tube 10 is open, and the outer periphery of the open bottom is welded to the traveling wave tube electron gun. Gas released during operation of the traveling wave tube electron gun can enter the inner cavity of the storage tube 10 through the open bottom of the storage tube 10. The getter in the inner cavity absorbs the gas released during operation of the traveling wave tube electron gun. The welding between the open bottom of the storage tube 10 and the traveling wave tube must ensure airtightness.

[0037] In a specific embodiment, the conductive block 40, the insulating block 30 and the sealing cover 20 are stacked in sequence from top to bottom. Figure 1 As shown, the conductive block 40, the insulating block 30 and the sealing cover 20 are arranged in a stepped manner, which facilitates the operation when activating the getter and facilitates the connection of the conductive block 40 to the power supply.

[0038] Specifically, the sealing cover 20 includes a first through hole, and the insulating block 30 includes a second through hole; the insulating block 30 is used to block the first through hole, and the conductive block 40 is used to block the second through hole. The provision of the first through hole and the second through hole enables the conductive block 40 to be directly connected to the inner cavity of the storage tube 10, facilitating the connection of one end of the getter with the conductive block 40. The sealing cover 20 is a sheet-like structure, and airtightness needs to be ensured when welding the insulating block 30 to the sealing cover 20, and when welding the insulating block 30 to the conductive block 40. Since the insulating block 30 is made of ceramic, in order to facilitate welding and ensure airtightness during the specific welding process, the bottom periphery of the insulating block 30 and the inner wall of the first through hole need to be metallized. Furthermore, the first through hole is located at the center of the sealing cover 20; the second through hole is located at the center of the insulating block 30. The entire storage structure is a symmetrical structure, which is also more convenient during the installation of the traveling wave tube.

[0039] Furthermore, the conductive block 40 and the insulating block 30, as well as the insulating block 30 and the sealing cover 20, are both sealed by brazing. Specifically, the insulating block 30 can be welded to the sealing cover 20 using, but not limited to, a silver-based solder. Furthermore, the insulating block 30 is welded in the first through-hole of the sealing cover 20; the conductive block 40 can be welded to the insulating block 30 using, but not limited to, a silver-based solder. Furthermore, the conductive block 40 is welded in the second through-hole of the insulating block 30.

[0040] The assembly process of the getter storage structure provided in the present application is as follows: first, the insulating block 30 is placed in the first through-hole of the sealing cover 20, and then the conductive block 40 is inserted into the second through-hole of the insulating block 30. The insulating block 30 is welded to the first through-hole and the conductive block 40 is welded to the second through-hole using a silver-based solder. After welding, the airtightness between the sealing cover 20 and the insulating block 30, as well as the insulating block 30 and the conductive block 40, must be maintained. Then, the bottom of the storage tube 10 is welded to the traveling wave tube electron gun using a silver-copper-based solder. After welding, the airtightness of the weld between the storage tube 10 and the traveling wave tube electron gun must be ensured. The getter is placed in the storage tube 10 through the open top of the storage tube 10, with one end of the getter connected to the inner wall of the storage tube 10 and the other end connected to the conductive block 40. Finally, the sealing cover 20 is placed on the top of the getter storage tube 10, and the connection is welded using argon arc welding to ensure the airtightness between the storage tube 10 and the sealing cover 20.

[0041] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A getter storage structure for a traveling wave tube, characterized in that: include A storage cylinder with an open top for containing a getter; A sealing cover, an insulating block and a conductive block are sequentially arranged to seal the open top of the storage cylinder; One end of the getter is connected to the inner wall of the storage cylinder, and the other end is connected to the bottom of the conductive block.

2. The getter storage structure for a traveling wave tube according to claim 1, characterized in that: The bottom of the storage cylinder is open, and the outer periphery of the open bottom is welded to the traveling wave tube.

3. The getter storage structure for a traveling wave tube according to claim 1, characterized in that: The conductive block, the insulating block and the sealing cover are stacked in sequence from top to bottom.

4. The getter storage structure for a traveling wave tube according to claim 1, characterized in that: The sealing cover includes a first through hole, and the insulating block includes a second through hole; The insulating block is used to block the first through hole, and the conductive block is used to block the second through hole.

5. The getter storage structure for a traveling wave tube according to claim 4, characterized in that: The first through hole is located at the center of the sealing cover; The second through hole is located at the center of the insulating block.

6. The getter storage structure for a traveling wave tube according to claim 1, characterized in that: The storage cylinder, the sealing cover and the conductive block are all made of metal; The insulating block is made of ceramic.

7. The getter storage structure for a traveling wave tube according to claim 1, characterized in that: The conductive block and the insulating block, and the insulating block and the sealing cover are sealed by brazing.

8. The getter storage structure for a traveling wave tube according to claim 1, characterized in that: The insulating block is welded to the sealing cover by silver-based solder, and the conductive block is welded to the insulating block by silver-based solder.

9. The getter storage structure for a traveling wave tube according to claim 1, characterized in that: The sealing cover and the storage cylinder are welded by argon arc welding, laser welding, or fusion welding.

10. The getter storage structure for a traveling wave tube according to claim 1, characterized in that: The diameter of the cross section of the storage cylinder is 10.2 mm to 10.4 mm.

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