CN203674150U - L wave band space travelling wave tube cathode composition - Google Patents
L wave band space travelling wave tube cathode composition Download PDFInfo
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- CN203674150U CN203674150U CN201320829260.0U CN201320829260U CN203674150U CN 203674150 U CN203674150 U CN 203674150U CN 201320829260 U CN201320829260 U CN 201320829260U CN 203674150 U CN203674150 U CN 203674150U
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Abstract
The utility model discloses an L wave band space travelling wave tube cathode composition comprising a cathode basal body and all assemblies in coaxial configuration; the cathode basal body emits electrons under heat radiation effect, and a heater is configured to provide heat radiation for the cathode basal body; the cathode basal body comprises a molybdenum cylinder and a basal body arranged on one end portion of the molybdenum cylinder; a heater assembly is clamped in the molybdenum cylinder in a single spiral configuration; a first shield cover and a second shield cover are used for fixedly connecting with a cup shell; a center of a first cover is provided with a first cover through hole and fixedly connected on an inner surface of the cup shell; a ceramic ring is provided with a ceramic ring through hole; the width of a middle portion of the ceramic ring is bigger than a wide end; a narrow end of the ceramic ring is fixedly connected with the first cover through hole and penetrates the first cover through hole; a second cover is fixedly connected with the first cover, the second cover and the first cover form a space suitable for fixing the middle portion of the ceramic ring, and a center of the second cover is provided with a second cover through hole; a sealing piece is fixedly connected with an end face of the ceramic ring, and a center of the sealing piece is provided with a sealing piece through hole. The composition provided by the scheme is vibration impact resistant, simple in structure, and high in heat efficiency.
Description
Technical field
The utility model relates to a kind of travelling wave tube cathode construction, particularly, relates to a kind of L-band space travelling wave tube cathode construction.
Background technology
L-band space travelling wave tube is most widely used Primary Component in domestic and international space payload system equipment in the present age, in space navigation, communication and data transmission system development, has very important status.L-band space travelling wave tube negative electrode is the critical component of whole L-band space travelling wave tube, requires to have the features such as long, working stability reliable, anti-vibrating and impact of life-span.
Concerning L-band space travelling wave tube negative electrode, guarantee the long-life of negative electrode, improve job stability, first to obtain strong guarantee from selecting of cathode construction.Negative electrode is selected extremely low working current density, guarantees the emissivities in the cathode life time, can reduce the working temperature of negative electrode simultaneously, greatly extends the useful life of negative electrode, improves the reliability of travelling wave tube.
The emission of common travelling wave tube negative electrode used is larger, and heat shielding adopts the coaxial simple structure arranging, and is not suitable for being applied to space travelling wave tube.So design one can improve useful life, guarantees steady operation, the negative electrode that improves structural strength is highly significant.
Utility model content
The purpose of this utility model is to overcome the high problem of L-band space travelling wave tube cathode construction insufficient strength, and the sufficiently high L-band space travelling wave tube of a kind of intensity cathode construction is provided.
To achieve these goals, the utility model provides a kind of L-band space travelling wave tube cathode construction, described cathode construction comprises: cathode base and with heater assembly, the first radome, cup shell, secondary shielding cover, the first lid, ceramic ring, the second lid and the closure of described cathode base arranged coaxial, wherein, described cathode base is configured to electron emission under thermal radiation effect, and described heater is configured to provide thermal radiation to described cathode base; Described cathode base comprises: molybdenum cylinder and the matrix arranging in described molybdenum cylinder one end, and described heater assembly is single-screw shape and is configured to snap in described molybdenum cylinder inside to be close to described matrix, and described heater assembly disposes central tap and upper lead-in wire; Described the first radome is straight-tube shape, and this radome inner surface is fixed in described molybdenum cylinder and arranges the outer surface of one end of described matrix; Described cup shell is three grades of step-like structures with wide end, interlude and narrow end, and the outer surface of described the first radome and described upper lead-in wire are fixed in the inner surface of the narrow end of described cup shell; Described secondary shielding cover inner surface is fixed in the outer surface of described cup shell interlude; The center configuration of described the first lid has the first lid through hole, and this first lid is fixed in the inner surface of the wide end of described cup shell; Described ceramic ring disposes ceramic ring through hole, and has wide end, middle-end and narrow end, and described ceramic ring middle-end width is greater than its wide end, and the narrow end of described ceramic ring is fixed in and passes described the first lid through hole; Described the second lid is fixed in described the first lid, the space that described the second lid and described the first lid surround is suitable for fixing described ceramic ring middle-end, the center configuration of described the second lid has the second lid through hole, and described ceramic ring width end is suitable for through this second lid through hole; Described closure is fixed on described ceramic ring width end end face, and described closure center configuration has closure through hole, and these closure card two ends dispose the first pin and the second pin; Described central tap is configured to through described the first lid through hole, described ceramic ring through hole, described the second lid through hole and described closure through hole to extend along described the second pin inwall.
Preferably, on described molybdenum cylinder inwall, be configured to zigzag.
Preferably, described cathode base and heater assembly are the integrative-structure that bakes knot.
Preferably, the wide end of described cup shell is configured to zigzag, and the narrow end of described cup shell disposes projection, and is separated by 120 ° between two adjacent projections of circumferencial direction.
Preferably, the sidewall of described secondary shielding cover disposes strip through-hole, and described strip through-hole disposes four row, and any one show eight strip through-holes, between two adjacent strip through-holes of circumferencial direction, is separated by 45 °.
Preferably, described ceramic ring through hole internal diameter equals described closure through hole internal diameter and is less than the first lid through hole internal diameter.
Preferably, described cathode construction also comprises tantalum paillon foil, and described tantalum paillon foil is configured to clamp so that described central tap is fixed in described the second pin.
Further preferably, described affixed for welding.
Further preferably, described cathode base transmitting spherical radius is 7.76 millimeters, and the transmitting sphere degree of depth is 0.26 millimeter, and external diameter is 4.36 millimeters.
Further preferably, the material of described matrix is tungsten; Described heater assembly comprises heater and embedding body, and wherein, the material of described heater is tungsten rhenium alloy wire, the schmigel that the material of described embedding body is sintering; The material of described tantalum paillon foil and described the first radome is tantalum paper tinsel; The material of described secondary shielding cover, described cup shell, described the first lid, described the second lid and described closure is kovar alloy; The material of described ceramic ring is that content is 99% alumina ceramic material.
The L-band space travelling wave tube cathode construction that technique scheme provides, volume is little, thermal capacitance is little and positioning precision is high, anti-mechanical oscillation, thermal shock ability are strong, cathode life is high, guarantee job stability and the reliability of L-band space travelling wave tube cathode construction, improved the qualification rate of L-band space travelling wave tube negative electrode.Because L-band space travelling wave tube negative electrode completes assembling in the very high frock of precision, so process repeatability and good stability.By this kind of design, to meet, L-band space travelling wave tube negative electrode working temperature is low, the life-span is long, working stability is reliable, vibration and shock resistant, the requirement that simple in structure and the heat efficiency is high.
Other feature and advantage of the present utility model are described in detail the embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide further understanding of the present utility model, and forms a part for specification, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:
Fig. 1 is the structural representation of the L-band space travelling wave tube cathode construction that provides of the utility model.
Description of reference numerals
1 cathode base 2 heater assemblies
3 first radome 4 secondary shielding covers
5 cup shell 6 first lids
7 second lid 8 ceramic rings
9 closure 10 tantalum paillon foils.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the utility model, is not limited to the utility model.
To achieve these goals, the utility model provides a kind of L-band space travelling wave tube cathode construction, described cathode construction comprises: cathode base 1 and with heater assembly 2, the first radome 3, cup shell 5, secondary shielding cover 4, the first lid 6, ceramic ring 8, the second lid 7 and the closure 9 of described cathode base 1 arranged coaxial, wherein, described cathode base 1 is configured to electron emission under thermal radiation effect, and described heater assembly 2 is configured to provide thermal radiation to described cathode base 1; Described cathode base 1 comprises: molybdenum cylinder and the matrix arranging in described molybdenum cylinder one end, described heater assembly 2 is single-screw shape and is configured to snap in described molybdenum cylinder inside to be close to described matrix, article one, heater assembly 2 lead-in wires are positioned at single-screw shape inside, and described heater assembly 2 disposes central tap and upper lead-in wire;
Described the first radome 3 is straight-tube shape, and these radome 3 inner surfaces are fixed in the outer surface that described molybdenum cylinder arranges one end of described matrix (for example, in Fig. 1, the first radome 3 its right end face and cathode base 1 end face of topping bar aligns);
Described cup shell 5 for example, for (having wide end, cup shell 5 left ends in Fig. 1), interlude (for example, cup shell 5 intermediate ends in Fig. 1) and narrow end is (for example, cup shell 5 right-hand members in Fig. 1) three grades of step-like structures, the outer surface of described the first radome 3 and described upper lead-in wire are fixed in the inner surface of described cup shell 5 narrow ends;
Described secondary shielding cover 4 inner surfaces are fixed in the outer surface of described cup shell 5 interludes, for example in Fig. 1, end has " L " type secondary shielding cover 4 of convex edge, after right side is enclosed within the step of cup shell 5, more affixed by the interface of nosing and the wide end of cup shell 5 and interlude;
The center configuration of described the first lid 6 has the first lid through hole, and this first lid 6 is fixed in the inner surface of described cup shell 5 wide ends, and cup shell 5 contact-making surface inner and the first lid 6 end faces is smooth;
Described ceramic ring 8 disposes ceramic ring through hole, and (for example there is wide end, the high order end of ceramic ring 8 in Fig. 1), middle-end (for example, the intermediate ends of ceramic ring 8 in Fig. 1) and narrow end (for example, the low order end of ceramic ring 8 in Fig. 1), described ceramic ring 8 middle-end width are greater than its wide end, the narrow end of described ceramic ring 8 is fixed in and passes described the first lid through hole, and for example, ceramic ring 8 is " ten " font ceramic ring, metal layer 10～30um in ceramic ring 8 left end face, nickel plating 1～3um after metallization.；
Described the second lid 7 is fixed in described the first lid 6, described the second lid 7 is suitable for fixing described ceramic ring 8 middle-ends with the space that described the first lid 6 surrounds, the center configuration of described the second lid 7 has the second lid through hole, the wide end of described ceramic ring 8 is suitable for through this second lid through hole, for example, the second lid 7 centers have the through hole that diameter is 4.2mm;
Described closure 9 is fixed on the wide end end face of described ceramic ring 8, and described closure 9 center configuration have closure through hole, and these closure 9 card two ends dispose the first pin and the second pin, and for example, pin widths is 1.5mm;
Described central tap is configured to through described the first lid through hole, described ceramic ring through hole, described the second lid through hole and described closure through hole to extend along described the second pin inwall.
In execution mode, on described molybdenum cylinder inwall, can be configured to zigzag, make the fixed place can be more fastening.
In execution mode, described cathode base 1 and heater assembly 2 can be for baking the integrative-structure of knot.
In execution mode, the wide end of described cup shell 5 is configured to zigzag, and the narrow end of described cup shell 5 disposes projection, and is separated by 120 ° between two adjacent projections of circumferencial direction.
In execution mode, the sidewall of described secondary shielding cover 4 can dispose strip through-hole, described strip through-hole can dispose four row, and any row can have eight strip through-holes, between two adjacent strip through-holes of circumferencial direction, be separated by 45 °, each strip through-hole is of a size of 2.5mm × 0.8mm.
In execution mode, described ceramic ring through hole internal diameter can equal described closure through hole internal diameter and be less than the first lid 6 through hole internal diameters, for example, the through hole that a diameter is 3.1mm can be processed in the first lid 6 centers, and closure through hole center has the through hole that diameter is 1.2mm.
In execution mode, described cathode construction can also comprise tantalum paillon foil 10, and described tantalum paillon foil 10 can be configured to clamp so that described central tap is fixed in described the second pin.
In a preferred embodiment, described affixed for using the welding of tungsten weldering cone.
In execution mode, described cathode base 1 is launched spherical radius can be 7.76 millimeters, and the transmitting sphere degree of depth can be 0.26 millimeter, and external diameter can be 4.36 millimeters.
In the above-described embodiment, the material of described matrix be tungsten (for example, adopt pure tungsten powder repressed, soak salt, a Vehicle Processing, soldering and secondary Vehicle Processing and form); Described heater assembly 2 comprises heater and embedding body, and wherein, the material of described heater is tungsten rhenium alloy wire (for example, adopting the coiling of Φ 0.13mm tungsten rhenium alloy wire), the schmigel that the material of described embedding body is sintering; The material of described tantalum paillon foil 10 and described the first radome 3 is tantalum paper tinsel; The material of described secondary shielding cover 4, described cup shell 5, described the first lid 6, described the second lid 7 and described closure 9 is kovar alloy (for example, material is kovar alloy 4J34); The material of described ceramic ring 8 is that content is 99% alumina ceramic material.
Be below the installation step of described L-band space travelling wave tube cathode construction, wherein,
S101 is potted in heater assembly 2 in the molybdenum cylinder of cathode base 1 by guncotton with schmigel, and is at 1750 ℃, to carry out sintering 10 minutes in temperature, and guarantees that heater cold resistance is 1.6 Ω.
S102 is put into the cathode base 1 that has plated film in heat shielding assembling jig, then the first radome 3 is enclosed within to cathode base 1 outside, bores and welds in contact position with tungsten weldering.
The assembly that S103 first completes step 2 is positioned in frock, then cup shell 5 is put in frock, bores in contact position and welds, and heater assembly 2 short legs are welded on cup shell 5 inwalls with tungsten weldering.
The assembly that S104 completes step 3 is positioned in frock, then secondary shielding cover 4 is enclosed within on assembly and fastening, welds with tungsten weldering cone in contact position.
S105 is positioned over the first lid 6, ceramic ring 8 and the second lid 7 in frock respectively, keeps three's alignment, bores the second lid 7 is welded on the first lid 6 with tungsten weldering.
Assembly, closure 9 and the oxygen-free copper scolder ring that S106 completes step 5 is positioned on brazing tooling also fastening, puts into hydrogen furnace, and carry out soldering at 1080 ℃ of temperature.
The assembly that S107 completes step 4 is positioned in assembly tooling, then brazed assembly step 6 being completed is put into assembly that step 4 completes fastening, in contact position welding, notice that the central tap of heater assembly 2 is through the through hole of step 6 brazed assembly with tungsten weldering cone.
Tweezers are adjusted the central tap of heater assembly 2 for S108, and central tap is extended along closure 9 one side leg inwalls, and the central tap of heater are connected fastening with closure with tantalum paillon foil 10.
Below describe by reference to the accompanying drawings preferred implementation of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned execution mode; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection range of the present utility model.
It should be noted that in addition, each concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between various execution mode of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (10)
1. a L-band space travelling wave tube cathode construction, it is characterized in that, described cathode construction comprises: cathode base (1) and with heater assembly (2), the first radome (3), cup shell (5), secondary shielding cover (4), the first lid (6), ceramic ring (8), the second lid (7) and the closure (9) of described cathode base (1) arranged coaxial, wherein, described cathode base (1) is configured to electron emission under thermal radiation effect, and described heater assembly (2) is configured to provide thermal radiation to described cathode base (1); Described cathode base (1) comprising: molybdenum cylinder and the matrix arranging in described molybdenum cylinder one end, described heater assembly (2) is single-screw shape and is configured to snap in described molybdenum cylinder inside to be close to described matrix, and described heater assembly (2) disposes central tap and upper lead-in wire;
Described the first radome (3) is straight-tube shape, and this first radome (3) inner surface is fixed in described molybdenum cylinder and arranges the outer surface of one end of described matrix;
Described cup shell (5) is for having three grades of step-like structures of wide end, interlude and narrow end, and the outer surface of described the first radome (3) and described upper lead-in wire are fixed in the inner surface of the narrow end of described cup shell (5);
Described secondary shielding cover (4) inner surface is fixed in the outer surface of described cup shell (5) interlude;
The center configuration of described the first lid (6) has the first lid through hole, and this first lid (6) is fixed in the inner surface of the wide end of described cup shell (5);
Described ceramic ring (8) disposes ceramic ring through hole, and has wide end, middle-end and narrow end, and described ceramic ring (8) middle-end width is greater than its wide end, and the narrow end of described ceramic ring (8) is fixed in and passes described the first lid through hole;
Described the second lid (7) is fixed in described the first lid (6), described the second lid (7) is suitable for fixing described ceramic ring (8) middle-end with the space that described the first lid (6) surrounds, the center configuration of described the second lid (7) has the second lid through hole, and the wide end of described ceramic ring (8) is suitable for through this second lid through hole;
Described closure (9) is fixed on the wide end end face of described ceramic ring (8), and described closure (9) center configuration has closure through hole, and this closure (9) card two ends dispose the first pin and the second pin;
Described central tap is configured to through described the first lid through hole, described ceramic ring through hole, described the second lid through hole and described closure through hole to extend along described the second pin inwall.
2. L-band space travelling wave tube cathode construction according to claim 1, is characterized in that, on described molybdenum cylinder inwall, is configured to zigzag.
3. L-band space travelling wave tube cathode construction according to claim 1, is characterized in that, described cathode base (1) and heater assembly (2) are for baking the integrative-structure of knot.
4. L-band space travelling wave tube cathode construction according to claim 1, is characterized in that, the wide end of described cup shell (5) is configured to zigzag, and the narrow end of described cup shell (5) disposes projection, and is separated by 120 ° between two adjacent projections of circumferencial direction.
5. L-band space travelling wave tube cathode construction according to claim 1, it is characterized in that, the sidewall of described secondary shielding cover (4) disposes strip through-hole, described strip through-hole disposes four row, and any one shows eight strip through-holes, between two adjacent strip through-holes of circumferencial direction, be separated by 45 °.
6. L-band space travelling wave tube cathode construction according to claim 1, is characterized in that, described ceramic ring through hole internal diameter equals described closure through hole internal diameter and is less than the first lid (6) through hole internal diameter.
7. L-band space travelling wave tube cathode construction according to claim 1, is characterized in that, described cathode construction also comprises tantalum paillon foil (10), and described tantalum paillon foil (10) is configured to clamp so that described central tap is fixed in described the second pin.
8. according to the L-band space travelling wave tube cathode construction described in any one in claim 1-7, it is characterized in that, described affixed for welding.
9. according to the L-band space travelling wave tube cathode construction described in any one in claim 1-7, it is characterized in that, described cathode base (1) transmitting spherical radius is 7.76 millimeters, and the transmitting sphere degree of depth is 0.26 millimeter, and external diameter is 4.36 millimeters.
10. L-band space travelling wave tube cathode construction according to claim 7, is characterized in that, the material of described matrix is tungsten; Described heater assembly (2) comprises heater and embedding body, and wherein, the material of described heater is tungsten rhenium alloy wire, the schmigel that the material of described embedding body is sintering; The material of described tantalum paillon foil (10) and described the first radome (3) is tantalum paper tinsel; The material of described secondary shielding cover (4), described cup shell (5), described the first lid (6), described the second lid (7) and described closure (9) is kovar alloy; The material of described ceramic ring (8) is that content is 99% alumina ceramic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320829260.0U CN203674150U (en) | 2013-12-16 | 2013-12-16 | L wave band space travelling wave tube cathode composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320829260.0U CN203674150U (en) | 2013-12-16 | 2013-12-16 | L wave band space travelling wave tube cathode composition |
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| Publication Number | Publication Date |
|---|---|
| CN203674150U true CN203674150U (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320829260.0U Expired - Fee Related CN203674150U (en) | 2013-12-16 | 2013-12-16 | L wave band space travelling wave tube cathode composition |
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| CN (1) | CN203674150U (en) |
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2013
- 2013-12-16 CN CN201320829260.0U patent/CN203674150U/en not_active Expired - Fee Related
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| 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: 20140625 Termination date: 20211216 |
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| CF01 | Termination of patent right due to non-payment of annual fee |