CN101447384A

CN101447384A - Multi-level depressurization collector for traveling wave tube

Info

Publication number: CN101447384A
Application number: CNA2008101480797A
Authority: CN
Inventors: 宫玉彬; 黄勇飞; 岳玲娜; 魏彦玉; 王文祥
Original assignee: University of Electronic Science and Technology of China
Current assignee: University of Electronic Science and Technology of China
Priority date: 2008-12-29
Filing date: 2008-12-29
Publication date: 2009-06-03
Anticipated expiration: 2028-12-29
Also published as: CN101447384B

Abstract

This invention belongs to a multi-level depressurization collector matched with traveling wave tube, comprising a cylindrical shell, each electrode and power source leading wire thereof mounted in the shell, an insulator mounted between each electrode and shell, an insulator rear cover provided with a power source leading hole, a front end cover. Because the original spare-parts type shell and the insulator thereof are designed to the integral cylindrical body with simple structure, the last level electrode is mounted at the central position of the inner wall of the rear cover, and the other each rear end electrodes are provided with the power source leading hole provided with an insulated sleeve for the front end electrode power source leading hole, this invention is featured with simple and compact structure, simple processing and assembling, strong suitability to the insulated material, small size, light weight and wider application range and so on, such that the defaults of complicated shapes the original spare-parts type shell and the insulator thereof has, need of mounting power source leading hole in the insulated layer, bad processing technology, difficult of assembling and bad suitability to the insulated material which are existed in the background technology are conquered.

Description

A kind of multi-level depressurization collector for traveling wave tube

Technical field

The invention belongs to the electron tube in the microwave technology, the particularly a kind of and supporting multi-level depressurization collector of using of travelling wave tube.

Background technology

With the supporting multi-level depressurization collector of using of travelling wave tube, comprise that collector housing, annular be located at electrodes at different levels and corresponding power outlet in the housing, be located at the ceramics insulator between each electrode and the housing and be located at power line in the insulator and draw (pipe) hole, be positioned at the housing rear portion and be with the insulator bonnet of power line fairlead.This type of multi-level depressurization collector be with through the electronics after the high frequency effect by velocity sorting, collect respectively, the big electronics of kinetic energy is got on the low-potential electrode, the electronics that kinetic energy is little is got on the high potential electrode, thereby speed all approaches zero when making electronics arrive the respective electrode surface.Like this, the dump energy that electronics is annotated is just backcrossed to power supply, thereby has improved the gross efficiency of travelling wave tube; In addition, requirement be can also reduce, and then travelling wave tube cost and maintenance cost reduced cooling system.Principle according to multi-level depressurization collector, each electrode of collector needs the power supply of external different voltages, its electric pressure is thousands of volts, thereby each electrode all need be provided with independently circumscripted power line, and also need carry out insulation processing between each electrode and power supply lead wire and other electrode in collector, and the quality of insulation property directly has influence on travelling wave tube performance and useful life thereof.The set-up mode of each electrode supply lead-in wire that 2 grades of routines and higher level (not) step-down thereof are collected is: power supply lead wire causes ceramics insulator, draws from the collector bonnet along the collector axis direction via the power line fairlead in the insulator along the electrode radial direction from two gaps between electrodes.In order to adapt to the lead-out mode of this type of electrode power-line, its insulator need adopt the ceramic-like insulator with certain intensity, and ceramic insulation parts and corresponding piece housing must be made each extremely discrete loose mail, be assembled into integral body during assembling again, thereby a whole set of insulator and housing thereof are not only complex-shaped, and processing technology is poor, assembly difficulty is big, to the bad adaptability of insulating material; Establish power line because of the insulating barrier domestic demand simultaneously and draw pore, also will cause the collector volume to increase, and hinder travelling wave tube in the application that volume, weight limits field are arranged, as fields such as spaces; Accompanying drawing 4 is disclosed multi-level depressurization collector structural representation in " travelling wave tube that adopts the compact multi-level depressed collector " (NASATechnical Paper, 1987).

Summary of the invention

The objective of the invention is the drawback at the background technology existence, a kind of multi-level depressurization collector for traveling wave tube of research and design to simplify the multi-level depressurization collector structure, reduces processing, assembly difficulty, reduces volume and weight; Reach simple in structure, compact, processing and assembly technology are easy, and volume is less, weight is lighter, and is strong to the adaptability of insulating material, purposes such as applied range.

Solution of the present invention is that the power supply lead wire of preceding termination electrode is directly drawn in the electrode body of rear end vertically, between power supply lead wire and each electrode insulated tube is set; And will be designed to integral type barrel-type casing simple in structure and tubular insulator with loose mail formula collector housing and the insulator improvement that former each electrode pair is answered, change the afterbody electrode into center by the annular setting simultaneously and be provided with, promptly directly be located at insulator bonnet inwall center, thereby realize its purpose.Therefore, the present invention includes housing, be located at each electrode and power outlet thereof in the housing, be located at the insulator between each electrode and the housing and be positioned at the housing rear portion and the insulator bonnet of band power line fairlead, front end housing, key is housing and the insulator be located between each electrode and the housing is integral type barrel-type casing and tubular insulator, the afterbody electrode directly is located at insulator bonnet inwall center, be equipped with the power line fairlead that is used for the tape insulation conduit that the front end electrode power-line draws in all the other each rear end electrode body, each electrode and tubular insulator inwall are fastenedly connected, the tubular insulator is then fixedlyed connected with inner walls, insulator bonnet and front end housing are integral with the housing fit sealing respectively, and the power outlet of each electrode is then drawn by power line fairlead sealed type.

Above-mentioned integral type tubular insulator is the ceramic-like insulator.

The present invention is owing to all be designed to integral type cylindrical body simple in structure with collector housing and the insulator be located between each electrode and the housing, simultaneously the afterbody electrode directly is located at insulator bonnet inwall center, and the power line fairlead of tape insulation conduit is set in the electrode body of all the other each rear ends.Thereby have simple in structurely, compact, processing and assembly technology are easy, and be strong to the adaptability of insulating material, characteristics such as volume is little, in light weight, and the scope of application is wider.

Description of drawings

Fig. 1 is the present invention and embodiment 1 multi-level depressurization collector structural representation (A-A view);

Fig. 2 is embodiment 1 a multi-level depressurization collector power outlet pore size distribution schematic diagram (vertical view of Fig. 1);

Fig. 3 is embodiment 2 multi-level depressurization collector structural representations;

Fig. 4 is a background technology multi-level depressurization collector structural representation.

Among the figure: 1. collector housing, 2. insulating cylinder, 3. front end housing, the 1st grade of electrode of 4-1., 4-2. the 2nd grade of electrode, 4-3. 3rd level electrode, the 4th grade of electrode of 4-4., 5. (power outlet is used) insulated conduit, 6. power outlet, 7. insulation bonnet, 7-1. power line fairlead, 7-2. electrode tip holder.

Embodiment

Embodiment 1; Is example with travelling wave tube with 4 grades of depressed collectors, and collector housing 1 inside and outside footpath is respectively φ 42mm and φ 45mm, long 90mm; Insulating cylinder 2, insulation bonnet 7 and insulated conduit 5 present embodiments all adopt conventional ceramics insulator, insulating cylinder 2 inside and outside footpaths are respectively φ 36mm and φ 42mm, axial long 65mm, insulation bonnet 7 external diameter φ 43mm, total thickness 12mm, it on the centre bore of power line fairlead 7-1 be positioned at axle center, all the other 3 holes by each at a distance of 120 °, radius R 13.5mm setting, electrode tip holder 7-2 diameter phi 18mm, high 6mm; Insulated conduit 5 external diameter φ 5mm, thickness of pipe wall 2mm; 1-3 level electrode 4-1,4-2,4-3 inner major diameter are φ 19mm, external diameter is φ 36mm, axially long 7mm, 25mm and the 35mm of being respectively, the 4th grade of axial high 9.5mm of electrode 4-4, with the dark 3mm of insulation bonnet 7 cooperation place grooves, the axial high 4.5mm of conical section; Front end housing 3 external diameters are the axial thick 3.5mm in φ 43mm, middle part, peripheral thick 1.5mm.

Embodiment 2; Accompanying drawing 3 is 3 grades of depressed collector structural representations of present embodiment; The inside and outside footpath of collector housing 1 and insulating cylinder 2 all is respectively 76mm and 51mm with embodiment 1 same, axial length, and insulating cylinder 2 present embodiments adopt beryllium oxide (BeO) pottery; The 2nd grade of electrode 4-2 and 3rd level electrode 4-3 are identical with 3rd level electrode 4-3 and the 4th grade of electrode 4-4 among the embodiment 1 respectively, the 1st grade of electrode 4-1 inner major diameter be φ 19mm, external diameter also for φ 36mm, axially longly be 20mm; External diameter, the total thickness of the external diameter of front end housing 3, insulated conduit 5, thickness of pipe wall and insulation bonnet 7, the diameter of middle electrode seat 7-2 is also all identical with

embodiment

1, and 3 power line fairlead 7-1 on the insulation bonnet 7 are located on the same diameter line, the both sides fairlead is 13.5mm apart from centre bore.

Claims

1, a kind of multi-level depressurization collector for traveling wave tube, comprise housing, be located at each electrode and power outlet thereof in the housing, be located at the insulator between each electrode and the housing and be positioned at the housing rear portion and the insulator bonnet of band power line fairlead, front end housing, the insulator that it is characterized in that housing and be located between each electrode and the housing is integral type barrel-type casing and tubular insulator, the afterbody electrode directly is located at insulator bonnet inwall center, be equipped with the power line fairlead that is used for the tape insulation conduit that the front end electrode power-line draws in all the other each rear end electrode body, each electrode and tubular insulator inwall are fastenedly connected, the tubular insulator is then fixedlyed connected with inner walls, insulator bonnet and front end housing are integral with the housing fit sealing respectively, and the power outlet of each electrode is then drawn by power line fairlead sealed type.

2, by the described multi-level depressurization collector for traveling wave tube of claim 1, it is characterized in that described integral type tubular insulator is the ceramic-like insulator.