CN109899263A - Annular ion thruster grid assembly - Google Patents
Annular ion thruster grid assembly Download PDFInfo
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- CN109899263A CN109899263A CN201910321224.5A CN201910321224A CN109899263A CN 109899263 A CN109899263 A CN 109899263A CN 201910321224 A CN201910321224 A CN 201910321224A CN 109899263 A CN109899263 A CN 109899263A
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- ring
- support construction
- combined type
- screen
- accelerating grid
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- 238000010276 construction Methods 0.000 claims abstract description 59
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 38
- 239000000919 ceramic Substances 0.000 claims abstract description 25
- 238000003466 welding Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 7
- 241000700608 Sagitta Species 0.000 claims description 4
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 230000001133 acceleration Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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- Plasma Technology (AREA)
- Particle Accelerators (AREA)
Abstract
Annular ion thruster grid assembly, including screen, accelerating grid, the first insulating ceramics ring, the second insulating ceramics ring, combined type screen support construction and combined type accelerating grid support construction.Screen and accelerating grid are annular, and the cross section of end face is the arc of protrusion；Combined type screen support construction includes outer ring, inner ring, arc reinforcing rib and auricle；Combined type accelerating grid support construction includes outer ring, inner ring, arc reinforcing rib and lug, and lug is corresponding with the position of auricle.Screen passes through with combined type screen support construction, accelerating grid and combined type accelerating grid support construction to be welded and fixed, first, second insulating ceramics is located between screen and accelerating grid, and combined type screen support construction and combined type accelerating grid support construction are fixed by lug and auricle using screw.Phenomena such as grid assembly of the invention is light-weight, intensity is big, heat resistanceheat resistant deformability is strong, is capable of warpage, the fold of effective suppressor grid assembly surface appearance, improves the performance of annular ion thruster.
Description
Technical field
The present invention relates to spacecraft electric propulsion field, especially a kind of annular ion thruster grid assembly.
Background technique
Annular ion thruster is in a kind of completely new in-orbit electric propulsion mode proposed in recent years, due to annular ion thrust
The advantages that device has high thrust (1~2N), high specific impulse (> 4000s), high efficiency, the blueness by international spacecraft electric propulsion market
It looks at.
Grid assembly is the critical component of annular ion thruster line ion acceleration and extraction, and structure specifically includes that
Screen, insulating ceramics, accelerating grid and support construction.Through load on grid (screen 2000V, accelerating grid are -450V)
Voltage form accelerating field, by ion acceleration in arc chamber and draw to generating thrust.Annular ion thrust grid at present
Pole component uses planar design scheme, i.e. screen and accelerating grid is planar structure, by the fixed screen of screw, insulating ceramics,
Accelerating grid and support construction.
Due to annular ion thruster operating power high (10kW~20kW) and bore is larger (> 50cm), in the course of work
Under long-term heat cumulative effect, so that above-mentioned existing planar structure grid assembly is easy to happen biggish thermal deformation, specifically include that
There is phenomena such as irregular warpage, fold in screen and accelerating grid surface, and grid spacing substantially deviates initial design values；Simultaneously
The restraining force of screw fixation method dies down, and exists to the thermal stability of grid assembly potential dangerous.This will affect line ion
Acceleration and extraction, and lead to the performance degradation of thruster.It is thus the performance for improving annular ion thruster, needs pair
The structure of grid assembly optimizes.
Summary of the invention
A kind of annular ion thruster grid assembly is provided the purpose of the present invention is overcoming the above-mentioned insufficient of the prior art,
It is convex configuration by setting screen and accelerating grid, and in combined type screen support construction and combined type accelerating grid support construction
On be respectively provided with reinforcing rib, and corresponding auricle and lug are set so that annular ion thruster grid assembly have it is stronger
Heat resistanceheat resistant deformability, and can be improved the structural strength of annular ion thruster grid assembly.
The technical scheme is that annular ion thruster grid assembly, including screen, accelerating grid, the first insulation pottery
Ceramic ring, the second insulating ceramics ring, combined type screen support construction and combined type accelerating grid support construction.
The screen and accelerating grid are annular, and the cross section of screen and accelerating grid end face is the arc of protrusion.
The combined type screen support construction includes outer ring, inner ring, arc reinforcing rib and auricle；The arc reinforcing rib
Quantity is eight, and eight arc reinforcing rib one end pass through welding respectively and connect with outer ring, and the other end passes through welding and inner ring respectively
Connection, eight arc reinforcing rib annulars are evenly arranged in outer ring and inner ring.The quantity of the auricle be it is multiple, multiple auricles are adopted respectively
With welding uniform ring cloth in inner ring and outer rings.
The combined type accelerating grid support construction includes outer ring, inner ring, arc reinforcing rib and lug；The arc reinforcing rib
Quantity be eight, eight arc reinforcing rib one end pass through welding respectively and connect with outer ring, the other end pass through respectively weld with it is interior
Ring connection, eight arc reinforcing rib annulars are evenly arranged in outer ring and inner ring.The quantity of the lug is multiple, multiple lug difference
Using welding uniform ring cloth in inner ring and outer rings.
The screen fits together with combined type screen support construction, and is integrated by being welded to connect, the acceleration
Grid fit together with combined type accelerating grid support construction, and are integrated by being welded to connect；The combined type accelerating grid support
Lug in structure is corresponding with the position of auricle in combined type screen support construction, enables to adopt and is screwed group
Box-like screen support construction and combined type accelerating grid support construction；The first ring insulating ceramics ring and the second ring insulating ceramics ring
It is coaxially disposed between screen and accelerating grid, and the first ring insulating ceramics ring and the second ring is insulated by screw rod, insulating washer
Ceramic ring is fixedly clamped.
The further technical solution of the present invention is: the quantity of the auricle is 18 pieces, and every piece of auricle is equipped with screw hole,
Insulation sleeve is equipped in screw hole, wherein six pieces of auricles are evenly arranged on the inner ring of inner ring using welding, 12 pieces of auricles are used
Welding is evenly arranged on the outer ring of outer ring；The quantity of the lug is 18 pieces, and every piece of lug is equipped with threaded hole, wherein six
Block lug is evenly arranged on the inner ring of inner ring using welding, and 12 pieces of lugs are evenly arranged in the outer ring of outer ring using welding
On.
Further technical solution is the present invention: the sagitta of the arc reinforcing rib arch with screen and accelerating grid respectively
It is high identical.
The further technical solution of the present invention is: the material of the screen and accelerating grid is pure molybdenum material, and described group
The material of box-like screen support construction, combined type accelerating grid support construction and arc reinforcing rib is TC4 titanium alloy material.
Compared with the prior art, the invention has the following features:
1, the screen of present invention setting annular ion thruster grid assembly and accelerating grid are convex configuration, guarantee to work as grid group
In the part course of work when expanded by heating, thermal deformation direction is the protrusion direction of screen and accelerating grid, without warpage, pleat occurs
Phenomena such as wrinkle, it is ensured that the plasma extraction in the thruster course of work is gone on smoothly.
2, the present invention using with screen and the combined type screen support construction with reinforcing rib for accelerating grid structure adaptable and
Combined type accelerating grid support construction, reinforcing rib can constrain the deformation of grid assembly, hinder or reduce grid assembly protrusion direction
Displacement；And reinforcing rib is supported with grid assembly surface, grid assembly and combined type screen support construction and combined type accelerating grid
Structure is all made of weldering welding, and compared to the grid assembly that original Internal and external cycle screw is fixed, the structure for being added significantly to grid assembly is strong
Degree.
3, combined type screen support construction of the present invention and combined type accelerating grid support construction are respectively equipped with auricle and lug,
After expanded by heating, auricle and lug itself can generate thermal deformation, directly use screw the way of restraint compared to original, thermal stress causes
Deformational displacement harm it is small, and auricle compares original fixed ring mode with the design of lug, reduces the weight of grid assembly.
Detailed construction of the invention is further described below in conjunction with the drawings and specific embodiments.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the A-A cross-sectional view of Fig. 1；
Fig. 3 is the structural schematic diagram of combined type screen support construction；
Fig. 4 is the B-B cross-sectional view of Fig. 3；
Fig. 5 is the structural schematic diagram of combined type accelerating grid support construction；
Fig. 6 is the C-C cross-sectional view of Fig. 5；
Fig. 7 is the structural schematic diagram of screen；
Fig. 8 is the D-D cross-sectional view of Fig. 7.
Specific embodiment
Embodiment, as shown in figures 1-8, annular ion thruster grid assembly, including the insulation of screen 1, accelerating grid 2, first
Ceramic ring 3-1, the second insulating ceramics ring 3-2, combined type screen support construction 4 and combined type accelerating grid support construction 5.
The screen 1 is annular, and the cross section of end face is the arc 1-1 of protrusion, and the sagitta of arc 1-1 is h, and h is
5mm。
The material of the screen 1 is pure molybdenum material.
For the structure of the accelerating grid 2 as the structure of screen 1, material is also identical.
The combined type screen support construction 4 includes outer ring 4-1, inner ring 4-2, arc reinforcing rib 4-3 and auricle 4-4.Institute
The quantity for stating arc reinforcing rib 4-3 is eight, and eight one end arc reinforcing rib 4-3 pass through welding respectively and connect with outer ring 4-1, separately
One end passes through welding respectively and connect with inner ring 4-2, and eight arc reinforcing rib 4-3 annulars are evenly arranged on outer ring 4-1 and inner ring 4-2.
The quantity of the auricle 4-4 is 18 pieces, and every piece of auricle 4-4 is equipped with screw hole, is equipped with insulation sleeve 4-5 in screw hole, wherein
Six pieces of auricle 4-4 are evenly arranged on the inner ring of inner ring 4-2 using welding, and 12 pieces of auricle 4-4 are evenly arranged in using welding
On the outer ring of outer ring 4-1.
The material of the combined type screen support construction 4, arc reinforcing rib 4-3 and auricle 4-4 is TC4 titanium alloy material
Matter.
The screen 1 fits together with combined type screen support construction 4, and is integrated by being welded to connect, combined type
Arc reinforcing rib 4-3 in screen support construction 4 can not only enhance the structure in 4 application process of combined type screen support construction
Intensity, additionally it is possible to reduce the thermal deformation displacement in 1 convex surface direction of screen.
The combined type accelerating grid support construction 5 includes outer ring 5-1, inner ring 5-2, arc reinforcing rib 5-3 and lug 5-4.
The quantity of the arc reinforcing rib 5-3 is eight, and eight one end arc reinforcing rib 5-3 pass through welding respectively and connect with outer ring 5-1,
The other end passes through welding respectively and connect with inner ring 5-2, and eight arc reinforcing rib 5-3 annulars are evenly arranged on outer ring 5-1 and inner ring 5-2
On.The quantity of the lug 5-4 is 18 pieces, and every piece of lug 5-4 is equipped with threaded hole, wherein six pieces of lug 5-4 are using welding
It is evenly arranged on the inner ring of inner ring 5-2,12 pieces of lug 5-4 are evenly arranged on the outer ring of outer ring 4-1 using welding.
The material of the combined type accelerating grid support construction 5, arc reinforcing rib 5-3 and lug 5-4 is TC4 titanium alloy material
Matter.
The accelerating grid 2 fits together with combined type accelerating grid support construction 5, and is integrated by being welded to connect, group
Arc reinforcing rib in box-like accelerating grid support construction 5 can not only enhance in 5 application process of combined type accelerating grid support construction
Structural strength, additionally it is possible to reduce 2 convex surface direction of accelerating grid thermal deformation displacement.
Ten on 18 pieces of lug 5-4 and combined type screen support construction 4 in the combined type accelerating grid support construction 5
The position of eight pieces of auricle 4-4 is corresponding, and auricle 4-4 and lug 5-4 itself can produce certain thermal deformation, phase after expanded by heating
Screw fixed Combination formula screen support construction and combined type accelerating grid support construction are directlyed adopt compared with original, is on the one hand reduced
The weight of grid assembly, on the other hand improves the thermal stability of grid assembly.
When integral installation, by the first ring insulating ceramics ring 3-1 and the second ring insulating ceramics ring 3-2 coaxial arrangement in screen 1
Between accelerating grid 2, and by screw rod 6, insulating washer 7 by the first ring insulating ceramics ring 3-1 and the second ring insulating ceramics ring 3-2
It is fixedly clamped, the first ring insulating ceramics ring 3-1 and the second ring insulating ceramics ring 3-2 are for the insulation between screen 1 and accelerating grid 2
Support, prevents screen 1 during the work time and accelerating grid 2 to be broken down by high-voltage and generate contact short circuit.
In use, high tension voltage load, on grid assembly, the line ion in arc chamber passes through screen 1 according to this and accelerates
Grid 2 carry out accelerating to generate thrust, and screen 1 and accelerating grid 2 occur for the heat accumulated during arc chamber line ion acceleration
Thermal deformation, since screen 1 and accelerating grid 2 are convex configuration, and convex surface direction is consistent, when the more generation heat of the heat of accumulation
When deformation, the direction of grid assembly thermal deformation is the convex surface direction of screen 1 and accelerating grid 2, i.e. the direction of thermal deformation concentrates on
The axial direction of grid assembly reduces grid assembly and warpage, pleat occurs to effectively reduce the radial deformation of grid assembly
Phenomena such as wrinkle, it is ensured that the line Ion Extraction in the annular ion thruster course of work is gone on smoothly with what is accelerated, and then is improved
The performance of annular ion thruster.
Claims (4)
1. annular ion thruster grid assembly, it is characterized in that: including screen, accelerating grid, the first insulating ceramics ring, the second insulation
Ceramic ring, combined type screen support construction and combined type accelerating grid support construction；
The screen and accelerating grid are annular, and the cross section of screen and accelerating grid end face is the arc of protrusion；
The combined type screen support construction includes outer ring, inner ring, arc reinforcing rib and auricle；The quantity of the arc reinforcing rib
It is eight, eight arc reinforcing rib one end pass through welding respectively and connect with outer ring, and the other end passes through welding respectively and connect with inner ring,
Eight arc reinforcing rib annulars are evenly arranged in outer ring and inner ring；The quantity of the auricle be it is multiple, weldering is respectively adopted in multiple auricles
Uniform ring cloth is connect in inner ring and outer rings；
The combined type accelerating grid support construction includes outer ring, inner ring, arc reinforcing rib and lug；The number of the arc reinforcing rib
Amount is eight, and eight arc reinforcing rib one end pass through welding respectively and connect with outer ring, and the other end passes through welding respectively and inner ring connects
It connects, eight arc reinforcing rib annulars are evenly arranged in outer ring and inner ring；The quantity of the lug be it is multiple, multiple lugs are respectively adopted
Uniform ring cloth is welded in inner ring and outer rings；
The screen fits together with combined type screen support construction, and by be welded to connect be integrated, the accelerating grid with
Combined type accelerating grid support construction fits together, and is integrated by being welded to connect；The combined type accelerating grid support construction
On lug it is corresponding with the position of auricle in combined type screen support construction, enable to using screw fixed Combination formula
Screen support construction and combined type accelerating grid support construction；The first ring insulating ceramics ring and the second ring insulating ceramics ring are coaxial
It is set between screen and accelerating grid, and by screw rod, insulating washer by the first ring insulating ceramics ring and the second ring insulating ceramics
Ring is fixedly clamped.
2. annular ion thruster grid assembly as described in claim 1, it is characterized in that: the quantity of the auricle is 18
Block, every piece of auricle is equipped with screw hole, is equipped with insulation sleeve in screw hole, wherein six pieces of auricles are evenly arranged in inner ring using welding
Inner ring on, 12 pieces of auricles are evenly arranged on the outer ring of outer ring using welding；The quantity of the lug is 18 pieces, every piece
Lug is equipped with threaded hole, wherein six pieces of lugs are evenly arranged on the inner ring of inner ring using welding, 12 pieces of lugs are using weldering
It connects on the outer ring for being evenly arranged in outer ring.
3. annular ion thruster grid assembly as described in claim 1, it is characterized in that: the sagitta of the arc reinforcing rib point
It is not identical as the sagitta of screen and accelerating grid.
4. annular ion thruster grid assembly as described in claim 1, it is characterized in that: the material of the screen and accelerating grid
It is pure molybdenum material, the combined type screen support construction, combined type accelerating grid support construction, arc reinforcing rib, auricle and convex
The material of piece is TC4 titanium alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910321224.5A CN109899263B (en) | 2019-04-22 | 2019-04-22 | Grid component of annular ion thruster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910321224.5A CN109899263B (en) | 2019-04-22 | 2019-04-22 | Grid component of annular ion thruster |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109899263A true CN109899263A (en) | 2019-06-18 |
| CN109899263B CN109899263B (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910321224.5A Expired - Fee Related CN109899263B (en) | 2019-04-22 | 2019-04-22 | Grid component of annular ion thruster |
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| Country | Link |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594115A (en) * | 2019-10-17 | 2019-12-20 | 大连理工大学 | Ring-shaped ion thruster without discharge cathode |
| CN111526654A (en) * | 2020-05-09 | 2020-08-11 | 航宇动力技术(深圳)有限公司 | Quasi-neutral plasma beam extraction device |
| CN112555113A (en) * | 2020-11-06 | 2021-03-26 | 兰州空间技术物理研究所 | Integrated insulation structure of grid component of ion thruster |
| CN112696329A (en) * | 2020-12-14 | 2021-04-23 | 兰州空间技术物理研究所 | Ion thruster grid insulation connection structure and assembly method |
| CN113279930A (en) * | 2021-06-30 | 2021-08-20 | 哈尔滨工业大学 | Grid component assembly structure and assembly method of micro ion thruster |
| CN114934883A (en) * | 2022-05-25 | 2022-08-23 | 兰州空间技术物理研究所 | Curved surface grid assembly of ion thruster |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594115A (en) * | 2019-10-17 | 2019-12-20 | 大连理工大学 | Ring-shaped ion thruster without discharge cathode |
| CN110594115B (en) * | 2019-10-17 | 2020-12-11 | 大连理工大学 | Ring-shaped ion thruster without discharge cathode |
| CN111526654A (en) * | 2020-05-09 | 2020-08-11 | 航宇动力技术(深圳)有限公司 | Quasi-neutral plasma beam extraction device |
| CN112555113A (en) * | 2020-11-06 | 2021-03-26 | 兰州空间技术物理研究所 | Integrated insulation structure of grid component of ion thruster |
| CN112555113B (en) * | 2020-11-06 | 2022-06-14 | 兰州空间技术物理研究所 | Integrated insulation structure of grid component of ion thruster |
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| CN112696329B (en) * | 2020-12-14 | 2022-06-10 | 兰州空间技术物理研究所 | Ion thruster grid insulation connection structure and assembly method |
| CN113279930A (en) * | 2021-06-30 | 2021-08-20 | 哈尔滨工业大学 | Grid component assembly structure and assembly method of micro ion thruster |
| CN113279930B (en) * | 2021-06-30 | 2022-07-12 | 哈尔滨工业大学 | Grid component assembly structure and assembly method of micro ion thruster |
| CN114934883A (en) * | 2022-05-25 | 2022-08-23 | 兰州空间技术物理研究所 | Curved surface grid assembly of ion thruster |
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Inventor after: Long Jianfei Inventor after: Li Juan Inventor after: Guo Dezhou Inventor after: Zhang Xueer Inventor after: Wang Yanlong Inventor after: Sun Mingming Inventor after: Chen Juanjuan Inventor before: Long Jianfei Inventor before: Sun Mingming |
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Effective date of registration: 20211227 Address after: 421001 Hunan province Hengyang Changsheng Road No. 28 Patentee after: University OF SOUTH CHINA Patentee after: LANZHOU INSTITUTE OF PHYSICS Address before: 421001 Hunan Province, Hengyang Zhengxiang District Road No. 28 Changsheng Patentee before: University OF SOUTH CHINA |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200714 |