CN201877392U - Structure of periodic permanent magnetic focusing system for traveling wave tube - Google Patents
Structure of periodic permanent magnetic focusing system for traveling wave tube Download PDFInfo
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- CN201877392U CN201877392U CN201020587079XU CN201020587079U CN201877392U CN 201877392 U CN201877392 U CN 201877392U CN 201020587079X U CN201020587079X U CN 201020587079XU CN 201020587079 U CN201020587079 U CN 201020587079U CN 201877392 U CN201877392 U CN 201877392U
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- permanent magnet
- pole shoe
- clip
- focusing system
- clamping hoop
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Abstract
The utility model discloses a structure of a periodic permanent magnetic focusing system for a traveling wave tube. The structure comprises a permanent magnet (2), a pole shoe (3) and a clamping hoop (4), wherein the permanent magnet (2) and the pole shoe (3) are arranged in the clamping hoop (4), and the clamping hoop (4) is sheathed on a vacuum tube shell (1) of a slow wave system. The inner diameters of the permanent magnet (2) and the pole shoe (3) are designed to be larger than the outer diameter of the vacuum tube shell (1), the influence of extrusion of the permanent magnet (2) and the pole shoe (3) on the vacuum tube shell (1) when the vacuum tube shell (1) is heated to be swelled can be avoided, the permanent magnet (2) and the pole shoe (3) do not need to be centered since the permanent magnet (2) and the pole shoe (3) are arranged on the clamping hoop (4) and then sheathed on the vacuum tube shell (1), the influence of the size errors of the permanent magnet (2) and the pole shoe (3) is reduced since the clamping hoop (4) is designed to be an elastic part, and a magnetic system of the permanent magnetic focusing system can be adjusted by rotating the clamping hoop (4). The structure is simple in structure and convenient in application.
Description
Technical field
The utility model belongs to the microwave vacuum field of electronic devices, is specifically related to a kind of structure of Periodic Permanent Magnetic for Traveling-Wave Tubes.
Background technology
Travelling wave tube is the power amplifying device that a kind of kinetic energy that utilizes high-velocity electrons to annotate and with the microwave signal mutual effect electronics is annotated is converted into microwave energy.The range of application of travelling wave tube is very extensive, nearly all satellite communication all with travelling wave tube as final amplifier.In most radar system, also can use one or some travelling wave tube as the high power amplifier that produces the high-frequency emission pulse.Travelling wave tube structurally comprises parts such as electron gun, slow wave circuit, concentrated attenuator, energy coupler, focusing system and collector.
Focusing system is used for focusing on annotating by the electronics of slow wave circuit.At present, the focusing system that adopts in the travelling wave tube uniform field permanent magnet focusing system arranged, swing to a permanent magnet focusing system, the periodic perperiodic permanent magnet focusing system.Wherein the most frequently used is the periodic perperiodic permanent magnet focusing system.
The periodic perperiodic permanent magnet focusing system comprises permanent magnet and pole shoe, permanent magnet and pole shoe are installed on the vacuum envelope of slow wave system, permanent magnet is generally ring-type, generally the size design of the external diameter of the internal diameter of the internal diameter of permanent magnet, pole shoe and slow wave system shell must need be worked in coordination, so that to permanent magnet and pole shoe positions and centering.Be installed on the vacuum envelope of slow wave system at permanent magnet and pole shoe after, need adjust the position of permanent magnet and pole shoe, because vacuum envelope is very fragile, shell is destroyed, and pole shoe and permanent magnet are difficult in and carry out rotary adjustment on the vacuum envelope; In addition, when the vacuum envelope expanded by heating of slow wave system, the as easy as rolling off a log extruding that is subjected to permanent magnet and pole shoe of vacuum envelope, crackle appears in its tube wall easily, finally will cause travelling wave tube to be scrapped.
The utility model content
Technical problem to be solved in the utility model provides a kind of structure of Periodic Permanent Magnetic for Traveling-Wave Tubes, reduces the installation of permanent magnet and pole shoe and position and adjusts influence to the traveling wave tube slow-wave system vacuum envelope.
To achieve these goals, the technical solution adopted in the utility model is:
The structure of described this Periodic Permanent Magnetic for Traveling-Wave Tubes comprises permanent magnet, pole shoe and clip.
Permanent magnet and pole shoe are installed in the clip.Have through hole on the clip, the aperture of clip cooperates with the vacuum envelope external diameter of traveling wave tube slow-wave system.
The clip profile is a cylindrical tube shape.As the preferred scheme of the utility model, clip is made notch cuttype.
Pole shoe is installed in the first step of clip, and permanent magnet is installed in the second step of clip.
As the preferred scheme of the utility model, the internal diameter interference fit of the external diameter of pole shoe and clip first step, the internal diameter interference fit of the external diameter of permanent magnet and clip second step.
Clip is formed by the material of elasticity and good heat conductivity, and as the preferred scheme of the utility model, clip is made by beryllium-bronze material.
For further strengthening the elastic performance of clip, on clip, be provided with some sulculuses.
When slow wave system vacuum envelope expanded by heating, for preventing pole shoe and permanent magnet squeezing action, design the internal diameter of pole shoe and permanent magnet bigger than vacuum envelope external diameter to vacuum envelope.
After permanent magnet and pole shoe are installed on the clip, hoop sleeve is contained on the vacuum envelope of slow wave system.Because the position of permanent magnet and pole shoe and clip is fixed, when hoop sleeve is contained on the vacuum envelope of slow wave system, do not need permanent magnet and pole shoe are carried out centering.
Can rotate the mode of clip by the axis around vacuum envelope comes the structure of described permanent magnet focusing system is carried out the magnetic adjustment.Simultaneously, because clip is a rubber-like, the scale error of pole shoe and permanent magnet can be eliminated by the elasticity of clip.
The utility model is by increasing the good clip of elastic performance in the periodic perperiodic permanent magnet focusing system, by permanent magnet and pole shoe are installed on the clip, again hoop sleeve is contained in the mode on the vacuum envelope of traveling wave tube slow-wave system, pole shoe and permanent magnet are to its extruding influence when having avoided the vacuum envelope expanded by heating, and pole shoe and permanent magnet when adjustment is installed to the influence of vacuum envelope, the utility model is simple in structure, and it is convenient to use, and has practical value.
Description of drawings
Below expressed content of each width of cloth accompanying drawing of the utility model specification and the mark among the figure are made brief description:
Fig. 1 is the schematic diagram of the structure of described periodic perperiodic permanent magnet focusing system;
Fig. 2 is the structural representation of clip;
Mark among the above-mentioned figure is:
1, vacuum envelope, 2, permanent magnet, 3, pole shoe, 4, clip, 5, sulculus, 6, first ladder, 7, second ladder.
Embodiment
Contrast accompanying drawing below, by description to embodiment, to the effect of the mutual alignment between the shape of embodiment of the present utility model such as related each member, structure, the each several part and annexation, each several part and operation principle etc., be described in further detail, design of the present utility model, technical scheme had more complete, accurate and deep understanding to help those skilled in the art.
The structure of Periodic Permanent Magnetic for Traveling-Wave Tubes as shown in Figure 1, permanent magnet 2 are installed in second ladder 7 of clip 4, and pole shoe 3 is installed in first ladder 6 of clip 4.
The internal diameter interference fit of second ladder 7 of the external diameter of permanent magnet 2 and clip 4, the internal diameter interference fit of first ladder 6 of the external diameter of pole shoe 3 and clip 4.
The internal diameter of pole shoe 2, permanent magnet 3 is greater than the external diameter of vacuum envelope 1.
In conjunction with the accompanying drawings the utility model has been carried out exemplary description above; obviously the utility model specific implementation is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that design of the present invention and technical scheme carry out; or design of the present utility model and technical scheme are directly applied to other occasion without improving, all within protection range of the present utility model.
Claims (5)
1. the structure of a Periodic Permanent Magnetic for Traveling-Wave Tubes, it comprises permanent magnet (2), pole shoe (3), it is characterized in that: it also comprises clip (4), and permanent magnet (2) and pole shoe (3) are contained in the clip (4), and clip (4) is sleeved on the vacuum envelope (1) of traveling wave tube slow-wave system.
2. according to the structure of the described periodic perperiodic permanent magnet focusing of claim 1 system, it is characterized in that: clip (4) profile is a cylindrical tube shape, and clip (4) is designed to stairstepping.
3. according to the structure of claim 1 or 2 described periodic perperiodic permanent magnet focusing systems, it is characterized in that: permanent magnet (2) is installed in second ladder (7) of clip (4), pole shoe (3) is installed in first ladder (6) of clip (4), the external diameter of permanent magnet (2) and pole shoe (3) and the internal diameter interference fit of clip (4).
4. according to the structure of the described periodic perperiodic permanent magnet focusing of claim 3 system, it is characterized in that: the internal diameter of permanent magnet (2) and pole shoe (3) is less than the external diameter of the vacuum envelope (1) of traveling wave tube slow-wave system.
5. according to the structure of claim 1 or 2 or 4 described periodic perperiodic permanent magnet focusing systems, it is characterized in that: clip (4) is provided with sulculus (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020587079XU CN201877392U (en) | 2010-11-01 | 2010-11-01 | Structure of periodic permanent magnetic focusing system for traveling wave tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020587079XU CN201877392U (en) | 2010-11-01 | 2010-11-01 | Structure of periodic permanent magnetic focusing system for traveling wave tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201877392U true CN201877392U (en) | 2011-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020587079XU Expired - Fee Related CN201877392U (en) | 2010-11-01 | 2010-11-01 | Structure of periodic permanent magnetic focusing system for traveling wave tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201877392U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236389A (en) * | 2013-04-03 | 2013-08-07 | 西南应用磁学研究所 | Periodic permanent magnetic structure |
| CN104851766A (en) * | 2015-05-27 | 2015-08-19 | 电子科技大学 | Periodic permanent magnet focusing system suitable for sheet electron beam |
| CN109732514A (en) * | 2018-12-29 | 2019-05-10 | 中国工程物理研究院应用电子学研究所 | A kind of Terahertz travelling-wave tubes periodic permanent magnet system magnet ring assembling jig |
| CN110189968A (en) * | 2019-06-06 | 2019-08-30 | 中国科学院电子学研究所 | Axial symmetry Periodic magnetic focusing system with prominent space harmonics three times |
| CN111383873A (en) * | 2020-03-06 | 2020-07-07 | 电子科技大学 | Novel adjustable magnetic focusing system suitable for ribbon traveling wave tube |
-
2010
- 2010-11-01 CN CN201020587079XU patent/CN201877392U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236389A (en) * | 2013-04-03 | 2013-08-07 | 西南应用磁学研究所 | Periodic permanent magnetic structure |
| CN103236389B (en) * | 2013-04-03 | 2015-10-07 | 西南应用磁学研究所 | periodic permanent magnetic structure |
| CN104851766A (en) * | 2015-05-27 | 2015-08-19 | 电子科技大学 | Periodic permanent magnet focusing system suitable for sheet electron beam |
| CN104851766B (en) * | 2015-05-27 | 2017-03-01 | 电子科技大学 | A kind of Periodic magnetic focusing system being applied to ribbon-like electron note |
| CN109732514A (en) * | 2018-12-29 | 2019-05-10 | 中国工程物理研究院应用电子学研究所 | A kind of Terahertz travelling-wave tubes periodic permanent magnet system magnet ring assembling jig |
| CN109732514B (en) * | 2018-12-29 | 2021-02-19 | 中国工程物理研究院应用电子学研究所 | Terahertz travelling wave tube periodic permanent magnet system magnetic ring assembly fixture |
| CN110189968A (en) * | 2019-06-06 | 2019-08-30 | 中国科学院电子学研究所 | Axial symmetry Periodic magnetic focusing system with prominent space harmonics three times |
| CN111383873A (en) * | 2020-03-06 | 2020-07-07 | 电子科技大学 | Novel adjustable magnetic focusing system suitable for ribbon traveling wave tube |
| CN111383873B (en) * | 2020-03-06 | 2021-07-06 | 电子科技大学 | Novel adjustable magnetic focusing system suitable for ribbon traveling wave tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20151101 |
|
| EXPY | Termination of patent right or utility model |