CN205645746U - Speed adjusting pipe sintering heater structure - Google Patents
Speed adjusting pipe sintering heater structure Download PDFInfo
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- CN205645746U CN205645746U CN201620306520.XU CN201620306520U CN205645746U CN 205645746 U CN205645746 U CN 205645746U CN 201620306520 U CN201620306520 U CN 201620306520U CN 205645746 U CN205645746 U CN 205645746U
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- heater
- sleeve
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- sphere
- klystron
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Abstract
The utility model discloses a speed adjusting pipe sintering heater structure, including heater, sleeve and insulating layer, heater and insulating layer setting are inside the sleeve, and the heater encircles and forms a plurality of rings of incense coil type spherical surface structure, and the sleeve includes sleeve top surface, sleeve bottom surface and sleeve lateral wall, and sleeve top surface and sleeve bottom surface also are spherical surface structure, respectively the circling of heater hold and the sleeve top surface between equal apart from h, design into incense coil type spherical surface structure with heater (or title filament), and incense coil type sphere heater upper end and sphere A are tangent, the sphere and the cathode emission face sphere of sphere A, sleeve top surface, sleeve bottom surface, negative pole bottom surface are concentric sphere, have guaranteed that the heater is preheating the in -process, and whole cathode emission face can be heated evenly in the short time very much, have overcome the temperature difference at cathode emission face center and border effectively, have guaranteed whole emission surface even " activation " to reduce the heating power of heater, prolonged the life of negative pole.
Description
Technical field
This utility model relates to high-power klystron technical field, burns in particular to a kind of klystron
Stagnation of pathogenic heat minor structure.
Background technology
The heater that barium-tungsten dispense cathode klystron is used in early days be usually " naked silk ", i.e. heater without
Process is directly installed in parts, and as shown in figure 11, the shape of this heater mostly is incense coil type and puts down
Face structure, whole heater is distributed in one plane.In warm, cathode center temperature is inclined
Height, lip temperature is on the low side, and hygral equilibrium to be reached takes long enough.Even if sometimes by very
Balance for a long time, the temperature at edge, emission of cathode face is still on the low side than the temperature at center
50～70 DEG C, the most greatly.
The emission current of hot cathode is closely related with the temperature in emission of cathode face, negative electrode
Surface of emission temperature is high, and emission current is the biggest, otherwise, emission of cathode surface temperature is low, emission current
The least.In the fabrication process, hot cathode, it is generally required to pass through " decomposition " (or claim
Predecomposition) and " activation " technique process.And the activation of negative electrode has the limit of a maximum temperature
System, exceeding this temperature cathode " will cross and activate ".So-called negative electrode " is crossed and is activated " and refers to more than the moon
After the activationary temperature higher limit of pole, the electron emissivity of negative electrode will not rise, and declines on the contrary, and
And once there is " cross and activate " in negative electrode, even if it is the most irrecoverable to reduce its emissivities of cathode temperature.
If the temperature difference at cathode-side edge and center is excessive, it is possible to two kinds of situations occur.One is cloudy
Center, pole is activated, and edge activates deficiency, and also having a kind of situation is that edge activates, and
Center " will be crossed and activate ".As can be seen here, the uniformity of emission of cathode surface temperature is most important
's.
And the thermal loss that " naked silk " state is when making heater work is very big, needs in the course of the work
Heater heating power to be improved could meet the temperature required by emission of cathode.Along with cathode technique
Raising, occur in that the Heater-Cathode assembly of sintering, as shown in figure 12, the heat of this structure
Son and negative electrode are sintered together, and reduce the thermal loss of a part.The cathode heater group of sintering
In part, heater typically uses double-spiral structure, and the heater of this structure is distributed in the edge part of negative electrode
Point, in heater warm, cathode edge temperature is high, and central temperature is low, and temperature to be reached is put down
Weighing apparatus is also required to preheating for a long time.And the cathode edge of this structure is the thickest, in real work
Time, bigger than normal to the heat radiation of side by negative electrode, the heating power of heater is accomplished by improving.
Said structure is while alumina powder sintering process, in addition it is also necessary to negative electrode and cathode support
Cylinder welds, and completes " the leaching salt " of negative electrode, " leaching salt " temperature, welding temperature and oxidation
Aluminium powder sintering temperature will influence each other, the most this structure complex process in the fabrication process,
Needing special equipment, have certain difficulty, yield rate is the highest, and manufacturing cost is the highest.
Utility model content
The purpose of this utility model is just to provide a kind of klystron sintering heater structure, to solve to pass
The klystron heater assembly structure heat shielding of system is poor, and modular construction installs the problems such as complicated.
For realizing this purpose, klystron of the present utility model sintering heater structure, including heater,
Sleeve and insulating barrier, described heater and described insulating barrier are arranged on described sleeve inner, described heat
Subring is around forming incense coil type spherical structure；Described sleeve includes sleeve end face, sleeve bottom surface and set
Cylinder sidewall, described sleeve end face, sleeve bottom surface are also spherical structure, on each circle of described heater
Hold equal with distance h between described sleeve end face.
Further, each circle upper end of described heater is tangent with sphere A, described sphere A and
Distance h between described sleeve end face is equal, and is 0.5～1mm.
Further, described sleeve end face and the curved surface of sleeve bottom surface, be concentric with sphere A
Sphere.
Further, described heater also includes the first lead-in wire and the second lead-in wire, described first lead-in wire
Stretch out insulating barrier with the second lead-in wire, and bearing of trend deviates from described sleeve end face, with described sleeve
Sidewall is parallel.
Further, described insulating barrier is that alumina powder is sintered to be formed, and is filled in described heat
Between each circle of son and between heater and sleeve end face, sleeve lateral wall.
Further, described sleeve connection cathodic body, and described cathodic body includes that negative electrode is sent out
Penetrate face and negative electrode bottom surface, and described emission of cathode face and described negative electrode bottom surface are sphere, described
Negative electrode bottom surface fits with described sleeve bottom surface.
Further, described emission of cathode face and the curved surface of negative electrode bottom surface, with described sphere A
For concentric spherical.
Further, described cathodic body also includes cannelure, embeds tantalum wire in described cannelure,
Described tantalum wire is connected to cathode support cylinder, the sidewall of described cathode support cylinder and the set of described sleeve
Gap is left between cylinder sidewall.
Further, described cannelure is rectangle shape along the sectional view of the axial direction of cathodic body
Shape, and along the broadside a that axial direction is cannelure of cathodic body, along the radial direction of cathodic body
Direction is the narrow limit b of cannelure, and a:b=1.5～2:1.
Further, described tantalum wire uses the method for machinery to embed in cannelure, and tantalum wire uses point
The method of weldering is connected to cathode support cylinder.
For realizing the purpose of this utility model, incense coil type sphere heater (or claiming filament) upper end phase
Sphere A, sleeve end face, sleeve bottom surface (near negative electrode bottom surface), negative electrode bottom surface and the moon cut
The pole surface of emission is concentric spherical；Its spherical radius is respectively R4, R3, R2, R2, R1,
And distance h=R4-R3 between each circle upper end and the sleeve end face of incense coil type sphere heater.
Quantity and the concrete size of cannelure are determined by size and the weight of cathodic body, typically work as
When cathode diameter is less than 50mm, use single cavity.
The operation principle of klystron of the present utility model sintering heater structure is: the first of heater is drawn
Line, the second lead-in wire connection power supply are energized, and heater is heated, and transfers heat to sleeve end face,
Sleeve end face transfers heat to sleeve bottom surface, and sleeve bottom surface transfers heat to negative electrode bottom surface,
Negative electrode bottom surface transfers heat to emission of cathode face again, and emission of cathode face is heated and is " activated ", and releases
Ejected electron.
The klystron sintering heater structure of this utility model design, compared with prior art, has
Following advantage:
(1) heater is designed to incense coil type spherical structure, and incense coil type sphere heater respectively encloses institute
Curved surface and emission of cathode face be concentric spherical, it is ensured that in heater warm, whole
Emission of cathode face can be heated evenly within a very short time, effectively overcomes in emission of cathode face
The heart and the temperature difference at edge, it is ensured that whole cathode plane uniformly " activation ", thus reduces heater
Heating power, extend the service life of negative electrode.
(2) heater, sleeve and alumina powder insulating barrier sintering form sintering heater structure, then
Negative electrode after processing with " leaching salt " assembles, and manufacturing process is to be separated and independently performed, and technique is grasped
Make simple, reduce cost, avoid the inconsistent institute of sintering temperature and " leaching salt " temperature simultaneously
Bring to sintering heater structural damage.
(3) during sintering heater structure is assembled with negative electrode, sleeve lateral wall and cathode support
Leave gap between cylinder sidewall, make negative electrode reduce to the heat radiation of side, thus reduce heater
Heating power, it is ensured that klystron sintering heater structure heat shielding.
(4) during sintering heater structure is assembled with negative electrode, due to cathodic body and negative electrode
On the face of cylinder that support tube connects, have square-section annular groove.In the annular groove of square-section embedding
Entering tantalum wire, tantalum wire is filled in the annular groove of full whole square-section, mechanically fixes, tantalum wire
It is connected with using the mode of spot welding between cathode support cylinder.Due to tantalum wire axially by square-section
The restriction on the narrow limit of cannelure, the most again by cathode support cylinder and annular groove width limit, square-section
Limiting, tantalum wire is the most immovable, thus completes cathodic body and cathode support cylinder
Between firm connection.So effectively overcome cathodic body and cathode support cylinder welding temperature,
Between leaching salt temperature and heater alumina powder sintering temperature, inconsistent the brought technology of temperature is stranded
Difficulty, thus improve yield rate, reduce cost.
Accompanying drawing explanation
Fig. 1 is the profile of the heater structure of sintering；
Fig. 2 is the enlarged drawing of the II of local flag in Fig. 1；
Fig. 3 is the profile after the heater sintered is connected with cathodic body；
Fig. 4 is the profile of cannelure；
Fig. 5 is the profile after cannelure is connected with tantalum wire；
Fig. 6 is the structural representation of heater and sleeve connection；
Fig. 7 is the structural representation that heater separates with sleeve；
Fig. 8 is the front view of heater；
Fig. 9 is the side view of heater；
Figure 10 is the top view of heater；
Figure 11 and Figure 12 is the profile of klystron sintering heater assembly in background technology；
Wherein, 1 heater: 1.1 first lead-in wires, 1.2 second lead-in wires；
2 sleeves: 2.1 sleeve end faces, 2.2 sleeve lateral wall, 2.3 sleeve bottom surfaces；
3 insulating barriers；
4 cathodic body: 4.1 emission of cathode faces, 4.2 negative electrode bottom surfaces, 4.3 annulars
Groove；
5 cathode support cylinders: 5.1 cathode support cylinder sidewalls；
6 gaps；
7 tantalum wires；
8 incense coil type planar structure heaters；
9 double-spiral structure heaters.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
As it is shown in figure 1, this utility model klystron sintering heater structure, including heater 1, set
Cylinder 2 and insulating barrier 3, and described heater 1 and described insulating barrier 3 be arranged on described sleeve 2
Inside, wherein, heater 1, around forming incense coil type spherical structure, understands in conjunction with Fig. 2, incense coil
Heater (or claiming filament) upper end of type spherical structure and sphere A are tangent, the introducing of sphere A
The incense coil type spherical structure of heater can be more easily discussed；This structure is different from conventional art
In incense coil type planar structure or double-stranded heater, its purpose primarily to ensure the moon
Pole is heated evenly；Sleeve 2 includes sleeve end face 2.1, sleeve bottom surface 2.3 and sleeve lateral wall 2.2,
Sleeve end face 2.1, sleeve bottom surface 2.3 are also spherical structure, with incense coil type spherical structure heater
Corresponding, and each circle of heater 1 is equal with distance h between sleeve end face 2.1, with heat
Distance between sphere A and described sleeve end face 2.1 that son each circle upper end is tangent is also h (h
It is preferably 0.5mm), h can also be between 0.5～1mm；Be designed to apart from equal, be for
Ensure that, when heating to heater, sleeve end face 2.1 is heated evenly；Understand further in conjunction with Fig. 2,
Described sleeve end face 2.1 and the curved surface of sleeve bottom surface 2.3, be concentric spherical with sphere A.
Understanding in conjunction with Fig. 1 and Fig. 2, heater 1 also includes the first lead-in wire for being connected with power supply
1.1 and second lead-in wire 1.2, wherein, first lead-in wire the 1.1, second lead-in wire 1.2 stretches out insulating barrier 3
(insulating barrier preferably alumina powder sintering form), and bearing of trend deviates from described sleeve end face
2.1, parallel with described sleeve lateral wall 2.2, and the alumina powder insulating barrier sintered is filled in described
Between each circle of heater 1 and between heater and sleeve end face 2.1, sleeve lateral wall 2.2, thus
Avoid heater short circuit, also can play the effect of heat shielding simultaneously.
As it is shown on figure 3, sleeve 2 is connected with cathodic body 4, cathodic body 4 includes negative electrode
The surface of emission 4.1 and negative electrode bottom surface 4.2, in order to preferably discharge electronics, negative electrode bottom surface 4.2 and the moon
The pole surface of emission 4.1 is sphere, simultaneously in order to ensure that emission of cathode face 4.1 is heated evenly, cloudy
The curved surface of the pole surface of emission 4.1 and negative electrode bottom surface 4.2 is concentric spherical, in the present embodiment, dish
The tangent sphere A in odor type sphere heater (or claim filament) upper end, sleeve end face 2.1, sleeve
Bottom surface 2.3 (sleeve bottom surface 2.3 near negative electrode bottom surface 4.2, negative electrode bottom surface 4.2 and sleeve bottom surface
2.3 fit), negative electrode bottom surface 4.2, emission of cathode face 4.1, be concentric spherical.
Understand in conjunction with Fig. 1, Fig. 2 and Fig. 3, in the present embodiment, the ball of negative electrode bottom surface 4.2
Radius surface R2 equal to spherical radius R1 and the cathodic body 4 in emission of cathode face 4.1 thickness it
With, and the thickness of cathodic body needs according to design and sets；And incense coil type sphere heater
Spherical radius R4 of the sphere A that (or claiming filament) upper end is tangent is equal to sleeve end face 2.1
Spherical radius R3 with h's and, additionally, also may be used in negative electrode bottom surface 4.2 and emission of cathode face 4.1
To be designed to other spherical form；Understand further in conjunction with Fig. 3, sleeve lateral wall 2.2 and negative electrode
Gap 6 is left, it is ensured that the heat shielding of the heater structure of sintering between support tube sidewall 5.1.
Further in conjunction with Fig. 3, in the present embodiment, cathodic body 4 also has cannelure 4.3,
And cannelure 4.3 is rectangular shape along the cross section of the axial direction of cathodic body 4, along negative electrode this
The axial direction of body 4 is the broadside a of cannelure 4.3, and the radial direction along cathodic body 4 is
The narrow limit b of cannelure 4.3, and a:b=1.5～2:1；Understand in conjunction with Fig. 4, Fig. 5, ring
Embedding tantalum wire 7 in shape groove 4.3, tantalum wire 7 is filled in full whole cannelure, and mechanically
It is fixed in cannelure, uses the mode of spot welding between described tantalum wire 7 and cathode support cylinder 5 even
Connect, thus ensure that cathodic body 4 is connected with cathode support cylinder 5；Owing to tantalum wire 7 is axially subject to
The restriction on the narrow limit of square-section annular groove 4.3, radial direction are cut by cathode support cylinder 5 and rectangle again
The restriction of face cannelure 4.3 broadside, tantalum wire 7 is the most immovable, thus completes
Firm connection between cathodic body 4 and cathode support cylinder 5.
As shown in Figure 6, Figure 7, the heater 1 of the incense coil type spherical structure in the present embodiment is arranged
In sleeve 2, corresponding with sleeve end face 2.1, sleeve end face 2.1 also decision design balling-up
Face structure, and sleeve end face 2.1 is concentric spherical with described negative electrode bottom surface 4.2, in this reality
Executing in example, the spherical radius of negative electrode bottom surface 4.2 is equal with the spherical radius of sleeve bottom surface 2.3,
Being R2, spherical radius R3 of sleeve end face 2.1 is equal to the spherical radius of sleeve bottom surface 2.3
R2 and sleeve 2 thickness sum, the thickness of sleeve 2 is also to set according to specific requirement, additionally,
Sleeve end face 2.1 and sleeve bottom surface 2.3 can also be designed to other spherical form；So set
The purpose of meter is also for ensureing that emission of cathode face 4.1 is heated evenly.
Understand in conjunction with Fig. 8, Fig. 9 and Figure 10, if the heater in the present embodiment 1 is around being formed
Dry circle incense coil type spherical structure, around the heater of formation incense coil type spherical structure, the center of circle often enclosed
On same straight line, but the radius often enclosed is different, and, different circle distance cathodic body 4
Sphere centre different, described heater 1 also includes first going between 1.1 for is connected with power supply
With the second lead-in wire 1.2, when the first lead-in wire 1.1 and the second lead-in wire 1.2 are switched on power, lead to
After electricity, heater generates heat, and transfers heat to sleeve 2.
Understanding further in conjunction with Fig. 1, described heater 1 and described insulating barrier 3 are arranged on described sleeve
In 2, between each circle of described heater 1, and respectively circle and sleeve end face 2.1 and sleeve lateral wall 2.2
Between be filled with alumina powder insulating barrier, thus ensure that heater is the most short-circuit, in atmosphere of hydrogen,
Heater 1, sleeve 2 and alumina powder insulating barrier 3 are carried out high temperature sintering, defines sintering
Heater structure.
Understand further in conjunction with Fig. 2, after cathodic body is carried out " leaching salt " process, with above-mentioned sintering
Heater structure assemble, be the formation of klystron sintering heater assembly, in order to ensure burn
The heat shielding of the heater assembly of knot, during assembling, sleeve lateral wall 2.2 and cathode branch
Gap 6 is left between support cylinder sidewall 5.1.
The operation principle of the klystron sintering heater structure of this utility model design is: the of heater
One lead-in wire, the second lead-in wire switch on power, and are energized, and heater is heated, and transfers heat to set
Cylinder end face, sleeve end face transfers heat to sleeve bottom surface again, and heat is transmitted by sleeve bottom surface again
To negative electrode bottom surface, negative electrode bottom surface transfers heat to emission of cathode face again, in order to ensure heater
Heat shielding, between each circle of heater, is filled with between heater and sleeve end face, sleeve lateral wall
Alumina powder insulating barrier, finally, emission of cathode face is heated and inspires electronics, in order to ensure negative electrode
The surface of emission launches electronics note uniformly, and emission of cathode face should be heated evenly, and this utility model is by heater
It is designed to incense coil type spherical structure, compensate for the problem that heat radiation in conventional art is bigger, simultaneously
Heater, sleeve and alumina powder insulating barrier sinter sintering heater structure into, then process with " leaching salt "
After negative electrode assemble, technological operation is simple, it also avoid sintering temperature and " leaching salt " temperature
The technical problem such as inconsistent the brought heater structural damage to sintering.
Claims (10)
1. a klystron sintering heater structure, including heater (1), sleeve (2) and insulating barrier (3), it is internal that described heater (1) and described insulating barrier (3) are arranged on described sleeve (2), it is characterised in that: described heater (1) is around forming incense coil type spherical structure；Described sleeve (2) includes sleeve end face (2.1), sleeve bottom surface (2.3) and sleeve lateral wall (2.2), described sleeve end face (2.1), sleeve bottom surface (2.3) are also spherical structure, and distance h between each circle upper end and the described sleeve end face (2.1) of described heater (1) is equal.
Klystron the most according to claim 1 sintering heater structure, it is characterised in that: each circle upper end of described heater (1) is tangent with sphere A, and distance h between described sphere A with described sleeve end face (2.1) is equal, and is 0.5～1mm.
Klystron the most according to claim 2 sintering heater structure, it is characterised in that: described sleeve end face (2.1) and the curved surface of sleeve bottom surface (2.3), be concentric spherical with sphere A.
Klystron the most according to claim 1 sintering heater structure, it is characterized in that: described heater (1) also includes the first lead-in wire (1.1) and the second lead-in wire (1.2), described first lead-in wire (1.1) and the second lead-in wire (1.2) stretch out insulating barrier (3), and bearing of trend deviates from described sleeve end face (2.1), parallel with described sleeve lateral wall (2.2).
Klystron the most according to claim 1 sintering heater structure, it is characterized in that: described insulating barrier (3) is that alumina powder is sintered to be formed, and be filled between each circle of described heater (1) and between heater (1) and sleeve end face (2.1), sleeve lateral wall (2.2).
Klystron the most according to claim 2 sintering heater structure, it is characterized in that: described sleeve (2) is connected to cathodic body (4), described cathodic body (4) includes emission of cathode face (4.1) and negative electrode bottom surface (4.2), and described emission of cathode face (4.1) and described negative electrode bottom surface (4.2) are sphere, described negative electrode bottom surface (4.2) fits with described sleeve bottom surface (2.3).
Klystron the most according to claim 6 sintering heater structure, it is characterised in that: the curved surface of described emission of cathode face (4.1) and negative electrode bottom surface (4.2) and described sphere A are concentric spherical.
Klystron the most according to claim 6 sintering heater structure, it is characterized in that: described cathodic body (4) also includes cannelure (4.3), described cannelure (4.3) embeds tantalum wire (7), described tantalum wire (7) is connected to cathode support cylinder (5), leaves gap (6) between sidewall (5.1) and the sleeve lateral wall (2.2) of described sleeve (2) of described cathode support cylinder (5).
Klystron the most according to claim 8 sintering heater structure, it is characterized in that: described cannelure (4.3) is rectangular shape along the cross section of the axial direction of cathodic body (4), and along the broadside a that axial direction is cannelure (4.3) of cathodic body (4), radial direction along cathodic body (4) is the narrow limit b of cannelure (4.3), and a:b=1.5～2:1.
Klystron sintering heater structure the most according to claim 8 or claim 9, it is characterized in that: described tantalum wire (7) uses the method for machinery to embed in cannelure (4.3), and tantalum wire (7) uses the method for spot welding to be connected to cathode support cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620306520.XU CN205645746U (en) | 2016-04-13 | 2016-04-13 | Speed adjusting pipe sintering heater structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620306520.XU CN205645746U (en) | 2016-04-13 | 2016-04-13 | Speed adjusting pipe sintering heater structure |
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| Publication Number | Publication Date |
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| CN205645746U true CN205645746U (en) | 2016-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620306520.XU Withdrawn - After Issue CN205645746U (en) | 2016-04-13 | 2016-04-13 | Speed adjusting pipe sintering heater structure |
Country Status (1)
| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105810535A (en) * | 2016-04-13 | 2016-07-27 | 湖北汉光科技股份有限公司 | Sintering heater structure of klystron |
| CN114078674A (en) * | 2021-11-23 | 2022-02-22 | 武汉联影医疗科技有限公司 | Electron emission element and X-ray tube |
-
2016
- 2016-04-13 CN CN201620306520.XU patent/CN205645746U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105810535A (en) * | 2016-04-13 | 2016-07-27 | 湖北汉光科技股份有限公司 | Sintering heater structure of klystron |
| CN114078674A (en) * | 2021-11-23 | 2022-02-22 | 武汉联影医疗科技有限公司 | Electron emission element and X-ray tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161012 Effective date of abandoning: 20171107 |