CN114242542A - Output end cover for traveling wave tube, connection method of output end cover and traveling wave tube comprising output end cover - Google Patents
Output end cover for traveling wave tube, connection method of output end cover and traveling wave tube comprising output end cover Download PDFInfo
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- CN114242542A CN114242542A CN202111565798.0A CN202111565798A CN114242542A CN 114242542 A CN114242542 A CN 114242542A CN 202111565798 A CN202111565798 A CN 202111565798A CN 114242542 A CN114242542 A CN 114242542A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000003466 welding Methods 0.000 claims description 84
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 54
- 229910052786 argon Inorganic materials 0.000 claims description 27
- 230000008569 process Effects 0.000 claims description 20
- 238000005219 brazing Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910000792 Monel Inorganic materials 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
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- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910000833 kovar Inorganic materials 0.000 claims description 3
- 230000006698 induction Effects 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000696 magnetic material Substances 0.000 description 4
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
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- 230000017525 heat dissipation Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/12—Vessels; Containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
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- Engineering & Computer Science (AREA)
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present disclosure relates to an output end cap for a traveling wave tube, a connection method thereof, and a traveling wave tube including the same, wherein the output end cap for the traveling wave tube includes: an end cap body comprising: a base adapted to be welded to a collector assembly of a traveling wave tube; and an outer cylinder extending from the base away from the collector assembly; and the output slow wave assembly of the traveling wave tube is combined with the outer cylinder through the combining part. Wherein, under the condition that the combination part is welded with the output slow wave assembly, the combination part is welded with the outer cylinder of the end cover main body, and then the base part of the end cover main body welded with the combination part is welded with the collector assembly. The output end cover of the traveling wave tube is designed into a split structure, so that the traveling wave tube has no drift region, the problem of difficulty in overlapping the traveling wave tube without the drift region is solved, the length of the traveling wave tube is shortened, the efficiency of the traveling wave tube is improved, and the yield of the traveling wave tube is improved.
Description
Technical Field
The disclosure relates to the technical field of microwave vacuum electronic devices, in particular to an output end cover for a traveling wave tube, a connection method of the output end cover and the traveling wave tube comprising the output end cover.
Background
The traveling wave tube is a core device for realizing signal amplification of satellite communication, and in the process production of the traveling wave tube, the traveling wave tube mainly comprises an electron gun, a slow wave assembly and a collector, the slow wave assembly and the collector are welded in a traditional welding mode through high-frequency induction brazing, and a lap joint structure with a drift region is adopted in a connecting mode, so that high-frequency induction centralized welding is facilitated. The drift region structure generally adopts hydrogen protection high-frequency induction welding, the heat affected zone is large, thermal shock is caused to the energy transmission window, in the welding process, the change of fit clearance can be caused when brazing filler metal is melted, the verticality of the output end cover assembly and the output high-frequency assembly is poor, and the qualification rate is high. When the structure of the drift region is absent, and during high-frequency brazing, the position of the high-frequency coil is narrow, the coil is contacted with a welded part in the welding process to cause short circuit or ignition, the thermal shock to the energy transmission window in the welding process is large, the problems of air leakage and scrapping of the energy transmission window of the traveling wave tube, deformation of a connecting part and the like are easily caused, and the yield of the traveling wave tube is reduced and the reliability is reduced. Argon arc welding or laser welding can finish processes of pre-fixing, measuring, welding and the like under the conditions of air environment and cold-state fixing of a die, the perpendicularity of an output end cover and an output slow wave component is guaranteed, and the finished product rate and the dimensional accuracy of the traveling wave tube are improved. Meanwhile, in order to improve the efficiency of the traveling wave tube, a drift-free region structure of the traveling wave tube is required to be realized. The output end cover is designed into a split structure, and a connecting method is designed, so that the problem of difficulty in lapping and manufacturing the traveling wave tube without a drift region is solved, the length of the traveling wave tube can be shortened, the efficiency of the traveling wave tube is improved, and the reliability and the yield of the traveling wave tube are improved.
Disclosure of Invention
In view of the above, the present disclosure provides an output end cap for a traveling wave tube, a connection method thereof, and a traveling wave tube including the same, so as to solve at least one of the above technical problems and other technical problems.
To achieve the above object, in one aspect of the present disclosure, an output end cap for a traveling wave tube includes: an end cap body comprising: a base adapted to be welded to a collector assembly of a traveling wave tube; and an outer cylinder extending from the base away from the collector assembly; and the output slow wave assembly of the traveling wave tube is combined with the outer cylinder through the combining part. Wherein, under the condition that the combination part is welded with the output slow wave assembly, the combination part is welded with the outer cylinder of the end cover main body, and then the base part of the end cover main body welded with the combination part is welded with the collector assembly.
According to an embodiment of the present disclosure, wherein the joint includes: an inner cylinder inserted and welded into the outer cylinder; and a flange extending radially outward from the inner cylinder outside the outer cylinder, the flange being welded to the output slow wave assembly.
According to the embodiment of the disclosure, the outer cylinder and the inner cylinder are combined through the argon arc welding thin wall of 0.5-0.7 mm; and the base part and the collector electrode assembly are combined through a thin wall of 0.5-0.7mm argon arc welding.
According to an embodiment of the present disclosure, wherein the end cap body is made of at least one of pure iron, kovar type material, or at least one of monel, non-magnetic stainless steel material; the joint part is made of Monel or non-magnetic stainless steel material.
In another aspect of the present disclosure, a connection method for connecting the output end cap for a traveling wave tube is provided, including: brazing the flange of the joint part and the output slow wave assembly in a hydrogen protection furnace; partially inserting a joint welded with the output slow wave assembly into an outer cylinder of the end cover main body; welding the joint part with the outer cylinder; the base of the end cap body welded to the joint is welded to the collector assembly using continuous wave argon arc welding.
According to an embodiment of the present disclosure, wherein, welding the joint portion with the outer cylinder includes: fixing the output slow wave assembly of the welded joint part by using a mold, and fixing the end cover main body by using the mold; pre-fixing the inner cylinder body of the joint part and the outer cylinder body of the end cover main body by adopting laser spot welding; and (3) welding the inner welding seam structure of the inner cylinder and the outer cylinder by using continuous wave argon arc welding.
According to the embodiment of the disclosure, in the laser spot welding pre-fixing process, the welding parameters of the laser spot welding are pulse width of 8ms and energy of 600J; the internal welding seam structure reduces the gas in the traveling wave tube and improves the stability of the vacuum degree in the working process of the traveling wave tube.
According to an embodiment of the present disclosure, wherein welding the base with the collector electrode assembly comprises: fixing the output slow wave component of the welded end cover main body and the joint part by using a mold, and fixing the collector component by using the mold; pre-fixing the base part of the end cover main body and the collector component by adopting pulsed argon arc welding; the base is welded to the collector assembly using continuous wave argon arc welding.
According to the embodiment of the disclosure, the welding current of the pulsed argon arc welding is 10A.
In a third aspect of the present disclosure, there is provided a traveling wave tube, including: the output end cap of any of the above embodiments; one end of the output slow wave component is welded with the joint part of the output end cover; and a collector assembly coupled to the base of the output end cap.
According to the output end cover for the traveling wave tube, the connecting method of the output end cover and the traveling wave tube comprising the output end cover, the output end cover is designed into a split structure, so that the perpendicularity of the output end cover and an output slow wave component can be ensured, and the yield and the size precision of the traveling wave tube are improved.
Drawings
FIG. 1 is a partial cross-sectional view of a traveling wave tube of a conventional one-piece output end cap;
FIG. 2 is a cross-sectional view of an output end cap for a traveling wave tube according to an embodiment of the present disclosure;
FIG. 3 is a partial cross-sectional view of a traveling wave tube of a split output end cap of an embodiment of the present disclosure; and
FIG. 4 is a schematic diagram of the output slow wave assembly and output end cap perpendicularity measurement according to an embodiment of the disclosure.
Description of the reference numerals
1 end cap body
11 base part
12 outer cylinder
2 joint part
21 inner cylinder
22 flange
3 collector assembly
4 output slow wave component
5 energy transmission window
6 drift region
7 integral type output end cover
8 high-frequency induction brazing solder
9 high-frequency induction brazing coil
10 output end cap
Detailed Description
For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
In the process production of the traditional traveling wave tube, the traditional welding mode of the slow wave component and the collector adopts high-frequency induction brazing, and the slow wave component and the collector have a lap joint structure of a drift region, so that the high-frequency induction centralized welding is facilitated. When the structure of the drift region is absent, and during high-frequency brazing, the position space of the high-frequency coil is narrow, the coil is contacted with a welded part in the welding process to cause short circuit or ignition, the thermal shock to the energy transmission structure is large in the welding process, the problems of air leakage, scrapping, deformation of a connection part and the like of the energy transmission structure of the traveling wave tube are easily caused, and the yield of the traveling wave tube is reduced and the reliability is low.
To this end, according to the general inventive concept of one aspect of the present disclosure, there is provided an output end cap for a traveling wave tube comprising: the end cover main body and the combining part are of two split structures. Wherein, the end cover main part includes: a base adapted for welding to a collector assembly of a traveling wave tube and an outer barrel extending from the base away from the collector assembly. The joint part is the position where the output slow wave component of the traveling wave tube is combined with the outer cylinder. Wherein, under the condition that the combination part is welded with the output slow wave assembly, the combination part is welded with the outer cylinder of the end cover main body, and then the base part of the end cover main body welded with the combination part is welded with the collector assembly.
According to the general inventive concept of another aspect of the present disclosure, there is provided a connection method using the output end cap for a traveling-wave tube, including: brazing the flange of the joint part and the output slow wave assembly in a hydrogen protection furnace; then partially inserting the joint part welded with the output slow wave assembly into an outer cylinder of the end cover main body, and welding the joint part with the outer cylinder; and finally, welding the base part of the end cover main body welded with the joint part and the collector assembly by continuous wave argon arc welding.
According to a general inventive concept of another aspect of the present disclosure, there is provided a traveling wave tube including the above-described output end cap; one end of the output slow wave component is welded with the joint part of the output end cover; and a collector assembly coupled to the base of the output end cap.
In the output end cover for the traveling wave tube, the connecting method thereof and the traveling wave tube, the output end cover of the traveling wave tube is designed into a split structure, and argon arc welding or laser welding is adopted, so that the processes of pre-fixing, measuring, welding and the like can be completed under the conditions of air environment and cold-state fixing of a die, the perpendicularity of the output end cover and an output slow wave assembly is ensured, and the finished product rate and the dimensional accuracy of the traveling wave tube are improved. Meanwhile, the traveling wave tube has no drift region, the length of the traveling wave tube is shortened, the efficiency of the traveling wave tube is improved, the problem that the traveling wave tube without the drift region is difficult to lap and manufacture is solved, and the reliability and the yield of the traveling wave tube are improved.
The technical solution of the present disclosure will be described in detail below with reference to specific examples. It should be noted that the following specific examples are only for illustration and are not intended to limit the disclosure.
FIG. 1 is a partial cross-sectional view of a traveling wave tube of a conventional one-piece output end cap.
As shown in fig. 1, 3 is a collector assembly, 4 is an output slow wave assembly, 5 is an energy transmission window, 6 is a drift region, 7 is an integrated output end cap, 8 is a high-frequency induction brazing solder, and 9 is a high-frequency induction brazing coil. In the production process of the traditional traveling wave tube, the output slow wave assembly 4 and the collector assembly 3 are welded in a high-frequency induction brazing mode in a traditional welding mode, and the connecting mode is a lap joint structure with a drift region 6. In order to improve the efficiency of the traveling wave tube and shorten the length of the traveling wave tube, a drift-free region of the traveling wave tube is to be realized, and in order to solve the problem of difficulty in lapping and manufacturing the traveling wave tube without the drift region, the output end cover of the traveling wave tube is designed into a split structure, the length of the traveling wave tube is shortened, the efficiency of the traveling wave tube is improved, and meanwhile, the reliability and the yield of the traveling wave tube are improved.
FIG. 2 is a cross-sectional view of an output end cap for a traveling wave tube according to an embodiment of the present disclosure; FIG. 3 is a partial cross-sectional view of a traveling wave tube of a split output end cap according to an embodiment of the disclosure.
As shown in fig. 2 and 3, the output end cap 10 for a traveling wave tube of the present disclosure includes: the end cover comprises an end cover main body 1 and a joint part 2, wherein the end cover main body and the joint part form two split structures. The end cap body 1 includes: a base 11 adapted to be welded to the collector assembly 3 of a travelling wave tube, and an outer barrel 12 extending from the base 11 away from the collector assembly 3. The output slow wave module 4 of the traveling wave tube is coupled to the outer tube 12 by the coupling portion 2. When the joint 2 is welded to the output slow wave module 4, the joint 2 is welded to the outer tube 12 of the end cap body 1, and the base 11 of the end cap body 1 welded to the joint 2 is welded to the collector module 3.
According to an embodiment of the present disclosure, the joint 2 includes: an inner cylinder 21 inserted and welded into the outer cylinder 12, and a flange 22 extending radially outward from the inner cylinder 21 outside the outer cylinder 12, the flange 22 being welded to the output slow wave module 4.
According to the embodiment of the disclosure, the outer cylinder 12 and the inner cylinder 21 are combined through an argon arc welding thin wall of 0.5-0.7 mm; and the base part 11 and the collector component 3 are combined through argon arc welding with the thickness of 0.5-0.7mm, and the surface of the collector component is not coated with a nickel layer or a copper layer.
According to the embodiment of the disclosure, the split welding structure of the output end cover 10 adopts the argon arc welding thin wall with the thickness of 0.5-0.7mm, the heat affected zone is concentrated on the output end cover 10, the heat impact on the energy transmission window 5 is avoided, and the yield and the reliability in the manufacturing process of the traveling wave tube are improved.
According to the embodiment of the disclosure, the end cover main body 1 is made of a magnetic material or a non-magnetic material, wherein the magnetic material is at least one of pure iron and kovar materials, and the non-magnetic material is at least one of Monel and non-magnetic stainless steel materials; the joint 2 is made of Monel or non-magnetic stainless steel material.
According to an embodiment of the present disclosure, a connecting method for connecting the output end cap 10 for a traveling wave tube includes: brazing the flange 22 of the joint 2 and the output slow wave assembly 4 in a hydrogen protective furnace; partially inserting the joint 2 welded with the output slow wave assembly 4 into the outer cylinder 12 of the end cover body 1; welding the joint 4 with the outer cylinder 12; the base portion 11 of the end cap body 1 welded to the joint portion 2 is welded to the collector assembly 3 using continuous wave argon arc welding.
FIG. 4 is a schematic diagram of the output slow wave assembly and output end cap perpendicularity measurement according to an embodiment of the disclosure.
According to the embodiment of the present disclosure, welding the joint 2 and the outer cylinder 12 includes: fixing the output slow wave assembly 4 of the welded joint part 2 by using a mould, and fixing the end cover main body 1 by using the mould; pre-fixing the inner cylinder 21 of the joint part 2 and the outer cylinder 12 of the end cover main body 1 by adopting laser spot welding; the inner cylinder 21 and the outer cylinder 12 are welded by an inner weld structure using continuous wave argon arc welding.
According to the embodiment of the disclosure, referring to fig. 4, in the process of partially inserting the joint part 2 welded with the output slow wave component 4 into the outer cylinder 12 of the end cover main body 1, to ensure form and position tolerance, laser spot welding is adopted to pre-fix the joint part, two points are symmetrically fixed firstly, and then the perpendicularity measurement of the output slow wave component 4 and the output end cover 10 is carried out, so that the requirement of 0.03mm perpendicularity is met; when the verticality is unqualified, the components which are fixed in advance are rotated by 90 degrees after being manually adjusted to be qualified, two points are symmetrically fixed in advance, the verticality is measured, and the requirement of the verticality is within 0.03 mm. And reinforcing the four pre-fixed points by using pulsed argon arc welding, and measuring whether the verticality meets the requirement again.
According to the embodiment of the disclosure, in the laser spot welding pre-fixing process, the welding parameters of the laser spot welding are pulse width of 8ms and energy of 600J.
According to the embodiment of the disclosure, the inner cylinder 21 of the joint part 2 and the outer cylinder 12 of the end cover main body 1 are welded by adopting an inner welding seam structure, the inner welding seam structure reduces the gas in the traveling wave tube, and the stability of the vacuum degree in the working process of the traveling wave tube is improved.
According to an embodiment of the present disclosure, the process of welding the base 11 with the collector assembly 3 includes: fixing the output slow wave component 4 of the welded end cover main body 1 and the joint part 2 by using a mould, and fixing the collector component 3 by using a mould; pre-fixing the base 11 of the end cover main body 1 and the collector component 3 by adopting pulsed argon arc welding; the base 11 is welded to the collector assembly 3 using continuous wave argon arc welding.
According to the embodiment of the disclosure, in the process of welding the base 11 and the collector assembly 3, the output slow wave assembly 4 of the base 11 with the end cover main body 1 welded is fixed by a mold, the collector assembly 3 is fixed by the mold, the collector assembly is wrapped by an oxygen-free copper heat dissipation mold, and the pre-fixing and verticality measuring method which is the same as the welding process of the inner cylinder 21 of the joint part 2 and the outer cylinder 12 of the end cover main body 1 is adopted.
According to the embodiment of the disclosure, the welding current of the pulsed argon arc welding is 10A.
According to the embodiment of the disclosure, after the inner cylinder 21 of the joint part 2 and the outer cylinder 12 of the end cover main body 1 and the base part 11 of the end cover main body 1 and the collector assembly 3 are welded, a helium mass spectrometer leak detector is adopted for leak detection, and the requirement of 1 × 10 is met- 10Pa.m3Leak rate per second requirement.
According to an embodiment of the present disclosure, there is also provided a traveling wave tube, including: the output end cap 10 of any of the above embodiments; the output slow wave component is welded at the joint of one end of the output slow wave component and the output end cover; and a collector assembly coupled to the base of the output end cap.
According to the output end cover for the traveling wave tube, the connecting method of the output end cover and the traveling wave tube comprising the output end cover, the output end cover of the traveling wave tube is designed into a split structure, argon arc welding or laser welding is adopted, processes such as pre-fixing, measuring and welding can be completed under the conditions of air environment and cold-state fixing of a die, the perpendicularity of the output end cover and an output slow wave assembly is guaranteed, and the finished product rate and the size precision of the traveling wave tube are improved. Meanwhile, the traveling wave tube has no drift region, the length of the traveling wave tube is shortened, the efficiency of the traveling wave tube is improved, the problem that the traveling wave tube without the drift region is difficult to lap and manufacture is solved, and the reliability and the yield of the traveling wave tube are improved.
It should also be noted that directional terms, such as "upper", "lower", "front", "rear", "left", "right", and the like, used in the embodiments are only directions referring to the drawings, and are not intended to limit the scope of the present disclosure. Throughout the drawings, like elements are represented by like or similar reference numerals. Conventional structures or constructions will be omitted when they may obscure the understanding of the present disclosure.
And the shapes and sizes of the respective components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present disclosure. Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the disclosure, various features of the disclosure are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the method of the invention should not be construed to reflect the intent: that is, the claimed disclosure requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing inventive embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this disclosure.
The above-mentioned embodiments are intended to illustrate the objects, aspects and advantages of the present disclosure in further detail, and it should be understood that the above-mentioned embodiments are only illustrative of the present disclosure and are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (10)
1. An output end cap for a traveling wave tube, comprising:
end cap body (1) comprising:
a base (11) adapted to be welded to a collector assembly (3) of a travelling wave tube; and
an outer cylinder (12) extending from the base away from the collector assembly (3); and a joint (2) through which the traveling-wave tube output slow-wave module (4) is joined to the outer cylinder (12);
wherein, under the condition that the joint part (2) is welded with the output slow wave assembly (4), the joint part (2) is welded with an outer cylinder (12) of the end cover main body (1), and then a base part (11) of the end cover main body (1) welded with the joint part (2) is welded with the collector assembly (3).
2. The output end cap for a traveling wave tube according to claim 1, wherein the joint (2) includes:
an inner cylinder (21) inserted and welded into the outer cylinder (12); and
a flange (22) extending radially outward from the inner cylinder (21) outside the outer cylinder (12), the flange (22) being welded to the output slow wave assembly (4).
3. The output end cap for a traveling wave tube according to claim 2, wherein,
the outer cylinder body (12) and the inner cylinder body (21) are combined through an argon arc welding thin wall of 0.5-0.7 mm; and
the base part (11) and the collector electrode assembly (3) are combined through an argon arc welding thin wall of 0.5-0.7 mm.
4. The output end cap for a traveling wave tube according to any one of claims 1 to 3, wherein,
the end cover main body (1) is made of at least one of pure iron and kovar materials or at least one of Monel and nonmagnetic stainless steel materials;
the joint part (2) is made of Monel or non-magnetic stainless steel materials.
5. A method of connecting the output end caps for traveling-wave tubes according to claims 1 to 4, comprising:
s1: brazing the flange (22) of the joint part (2) and the output slow wave assembly (4) in a hydrogen protection furnace;
s2: partially inserting a joint part (2) welded with the output slow wave assembly (4) into an outer cylinder (12) of the end cover main body (1);
s3: welding the joint part (2) with the outer cylinder body (12);
s4: the base (11) of the end cap body (1) welded to the joint (2) is welded to the collector assembly (3) using continuous wave argon arc welding.
6. The connection method according to claim 5, wherein welding the joint (2) with the outer cylinder (12) comprises:
s31: fixing the output slow wave assembly (4) welded with the joint part (2) by using a mold, and fixing the end cover main body (1) by using the mold;
s32: pre-fixing the inner cylinder (21) of the joint part (2) and the outer cylinder (12) of the end cover main body (1) by adopting laser spot welding;
s33: and (3) welding the inner cylinder body (21) and the outer cylinder body (12) by using continuous wave argon arc welding to form an inner welding seam structure.
7. The connecting method according to claim 6,
in the laser spot welding pre-fixing process, the welding parameters of the laser spot welding are pulse width of 8ms and energy of 600J;
the internal welding seam structure reduces the gas in the traveling wave tube and improves the stability of the vacuum degree in the working process of the traveling wave tube.
8. The connection method according to claim 5, wherein welding the base (11) with the collector assembly (3) comprises:
s41: fixing the output slow wave component (4) welded with the end cover main body (1) and the joint part (2) by using a mold, and fixing the collector component (3) by using a mold;
s42: pre-fixing the base (11) of the end cover main body (1) and the collector assembly (3) by adopting pulsed argon arc welding;
s43: welding the base (11) to the collector assembly (3) using continuous wave argon arc welding.
9. The connecting method according to claim 8,
the welding current of the pulsed argon arc welding is 10A.
10. A traveling wave tube, comprising:
the output end cap (10) of any one of claims 1 to 4;
one end of the output slow wave component is welded with the joint part (2) of the output end cover; and
a collector assembly coupled to the base (11) of the output end cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111565798.0A CN114242542B (en) | 2021-12-20 | 2021-12-20 | Output end cover for traveling wave tube, connecting method of output end cover and traveling wave tube comprising output end cover |
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