CN206892123U - A kind of accelerometer seal casinghousing of repeatable dismounting - Google Patents
A kind of accelerometer seal casinghousing of repeatable dismounting Download PDFInfo
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- CN206892123U CN206892123U CN201720513965.XU CN201720513965U CN206892123U CN 206892123 U CN206892123 U CN 206892123U CN 201720513965 U CN201720513965 U CN 201720513965U CN 206892123 U CN206892123 U CN 206892123U
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- top cover
- flange
- bottom plate
- middle casing
- seal casinghousing
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Abstract
It the utility model is related to a kind of accelerometer seal casinghousing of repeatable dismounting.The seal casinghousing includes top cover, bottom plate and the middle casing between top cover and bottom plate, wherein described top cover has flange in open at one end, middle casing upper and lower ends opening, and there is flange, bottom plate is the flat board for including mounting hole, the seal casinghousing also include being arranged on top cover, bottom plate and middle casing it is one of any on, connection is outside and the leak detection stomata of the closing space, the flange of middle casing are connected by laser welding with bottom plate and top cover flange respectively.Seal casinghousing of the present utility model can realize highly reliable sealing structure, lift the environmental suitability and long term repeatability liter of accelerometer, and disassembling for housing can be realized under atomic small vibration, ensure accelerometer core component and housing it is intact, realize the recycling of accelerometer core component and housing.
Description
Technical field
The utility model belongs to structure-design technique field, is related to the repeatable dismounting of one kind that high-precision accelerometer uses
Accelerometer seal casinghousing.
Background technology
Accelerometer is the core parts of inertial navigation system, is had widely in Aero-Space and other technical fields
Application.The precision of accelerometer has direct influence for inertial navigation precision, in order that accelerometer is protected in a long time
Higher precision is held, it is necessary to carry out encapsulation process to accelerometer, the sealing property of accelerometer directly determines accelerometer
Environmental suitability and long term repeatability.
The sealing generally use seal with elastometic washer of accelerometer or Laser Welding sealing.Seal with elastometic washer is convenient to dismantle, but
It is that sealing effectiveness and sealing life are poor；Laser Welding is sealed with very high reliability, but housing knot can be made by carrying out dismounting to it
Structure even produces heavy damage inside accelerometer, it is high to reprocess cost.
Current high-precision accelerometer needs a kind of seal casinghousing, can either meet highly reliable seal request, and and can is enough
The problem of overcoming conventional laser weldering housing to be difficult to reprocess, disassembling for housing is realized under atomic small vibration, ensures accelerometer
Core component and housing integrity, realize the recycling of accelerometer core component and housing.
Utility model content
The purpose of this utility model is：A kind of accelerometer capsul of repeatable dismounting is provided for high-precision accelerometer
Body.
The technical solution of the utility model：A kind of accelerometer seal casinghousing of repeatable dismounting, including top cover, bottom plate and
Middle casing between top cover and bottom plate.The top cover is one end closing, the housing of one end open, is turned in open at one end
Side.Middle casing upper and lower ends opening, and have flange, towards the size and top cover flange phase of the flange of top cover one end open
Together, the thickness of the flange of another end opening is more than the thickness of top cover flange.Bottom plate is the flat board for including mounting hole, the mounting hole
Outside the closing space formed positioned at top cover, middle casing and bottom plate.The seal casinghousing also include be arranged on top cover, bottom plate and
On middle casing is one of any, connection is outside and the leak detection stomata of the closing space.Thick flange and the bottom plate of middle casing be
Connected by laser welding, top cover flange is connected after being alignd with middle casing flange by laser welding.
Further, the seal casinghousing also includes being arranged on bottom plate, in closing space, in laser welding
When, assist in multiple pins of the position of middle casing.
Further, the pin is located at the diagonal of closing space, and number is 2.
Further, the thickness of top cover flange is 0.5~1mm.
Further, the thickness of the flange of another end opening of the middle casing is 2 times of thickness of top cover flange.
Further, the leak detection stomata is arranged on bottom plate or top cover.
The beneficial effects of the utility model：Accelerometer is carried out using accelerometer seal casinghousing of the present utility model close
Envelope, seal casinghousing is simple in construction, and sealing reliability is high, long lifespan, can be obviously improved the environmental suitability and length of accelerometer
Phase repeatability, reduce the probability that accelerometer is broken down due to environment reason；It disclosure satisfy that accelerometer is harmless to reprocess
Demand, effectively reduce maintenance and the maintenance cost of accelerometer.
Brief description of the drawings
Fig. 1 is the schematic perspective view of accelerometer seal casinghousing of the present utility model；
Fig. 2 is the front view of accelerometer seal casinghousing of the present utility model；
Fig. 3 is the top cover schematic diagram of accelerometer seal casinghousing of the present utility model；
Fig. 4 is the middle casing schematic diagram of accelerometer seal casinghousing of the present utility model；
Fig. 5 is the bottom plate schematic diagram of accelerometer seal casinghousing of the present utility model；
Wherein, 1- top covers, 2- middle casings, 3- bottom plates, 4- top covers flange, 5- middle casings flange, 6- middle casings are thick
Flange, 7- mounting holes, 8- pins, 9- leak detection stomatas.
Embodiment
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings.
Referring to Fig. 1 to Fig. 5, the accelerometer seal casinghousing of repeatable dismounting of the present utility model includes top cover 1, middle case
Body 2 and bottom plate 3, its bottom plate are located at the bottommost of the structure, and middle casing is located at the middle part of structure, and top cover is located at structure
The top.
Top cover 1 is one end closing, the housing of one end open, has top cover flange 4 in open at one end, and its usual thickness is 0.5
~1mm, preferably 0.5mm, it is 0.8mm beyond shell length.
The upper and lower ends opening of middle casing 2, and have flange, size and top towards the flange 5 of top cover one end open
Lid flange 4 is identical, the thickness of the flange 6 of another end opening is more than the thickness of top cover flange 4, usually the thickness of top cover flange
2 times, preferably 1mm.The thickness of top cover flange and middle casing flange can be adjusted according to processing and design requirement.
Bottom plate 3 is the flat board for including mounting hole 7, and the mounting hole 7 is located at what top cover 1, middle casing 2 and bottom plate 3 were formed
Outside closing space.
The seal casinghousing also include being arranged on top cover 1, bottom plate 3 and middle casing 2 it is one of any on, connection is outside and institute
The leak detection stomata 9 of closing space is stated, for inflating and checking housing leak rate.In this example, stomata 9 of hunting leak is the gas through bottom plate
Hole, its diameter are less than 1mm.
The seal casinghousing also includes being arranged on bottom plate, true in laser welding, helping in closing space
Determine multiple pins 8 of the position of middle casing.In this example, two pins 8 are located at the diagonal position of closing space, are higher by bottom plate
3mm。
When carrying out housing seal, bottom plate 3 is located at bottom, the one side comprising pin 8 upward, the middle case of middle casing 2
Body thickness flange 6 is in contact with the upper surface of bottom plate 3, and it is welded using Laser Welding, and its installation site is protected by two pins 8
Card.Bottom plate 3 is completed with after the connection of middle casing thickness flange 6, connecting top cover 1 and middle casing 2, by top cover flange 4 and centre
Housing flange 5 aligns, and carries out laser welding.After the completion of welding, using helium mass spectrometer, housing is entered at leak detection stomata 9
Row leak detection.If measuring leak rate meets airtight requirement, after filling protective gas to structure, by stomata 9 Laser Welding or the tin of hunting leak
The modes such as weldering are blocked, and sealing structure is completed；If measuring leak rate is unsatisfactory for airtight requirement, need to turn over middle casing thickness
Side 6 carries out repair welding with bottom plate 3, top cover flange 4 and the welding position of middle casing flange 5, and confirmation of hunting leak again meets seal request
Afterwards, then it is inflated and blocks leak detection stomata 9.
Although be described above using pin 8 to ensure laser welding, the example of the installation site of middle casing 2, no
Cross also can using means to ensure laser welding when, the installation site of middle casing 2, such as using fixture in this case, can
It is not provided with pin 8.
When progress housing is reprocessed, using high-precision milling machine, by the junction of top cover 1 and middle casing 2 (top cover flange 4
With middle casing flange 5) mill one week, because the depth of Laser Welding is very shallow, flange is milled into 0.2mm length beyond housing parts
Degree, you can disengage top cover flange 4 and middle casing flange 5, and turnup structure is relatively thin, reduces the feed of milling cutter by adjusting
Amount, it is ensured that obvious vibration is nearly free from milling process, will not be caused to damage to accelerometer internal structure.Top
After lid flange 4 and middle casing flange 5 disengage, leak detection stomata 9 is reopened using drill bit or laser, is again coupled to top cover
Flange 4 and middle casing flange 5, you can reprocessed and resealed to accelerometer.
Claims (6)
1. a kind of accelerometer seal casinghousing of repeatable dismounting, including top cover (1), bottom plate (3) and positioned at top cover (1) and bottom plate
(3) middle casing (2) between, wherein
The top cover (1) is one end closing, the housing of one end open, has flange (4) in open at one end,
Middle casing (2) upper and lower ends opening, and have flange, size and top towards the flange (5) of top cover one end open
Lid flange (4) is identical, and the thickness of the flange (6) of another end opening is more than the thickness of top cover flange (4),
Bottom plate (3) is the flat board for including mounting hole (7), and the mounting hole (7) is located at top cover (1), middle casing (2) and bottom plate
(3) outside the closing space formed, the seal casinghousing also includes being arranged on top cover (1), bottom plate (3) and middle casing (2) times
In one of meaning, the outside leak detection stomata (9) with the closing space of connection,
The thick flange (6) of middle casing is connected with bottom plate (3) by laser welding, and top cover flange (4) turns over middle casing
Side (5) is to be connected after aliging by laser welding.
2. according to the seal casinghousing described in claim 1, wherein the seal casinghousing also includes being arranged on bottom plate (3), it is located at
In closing space, multiple pins (8) of the position in laser welding, assisting in middle casing (2).
3. according to the seal casinghousing described in claim 2, wherein the pin (8) is located at the diagonal of closing space, number 2
It is individual.
4. according to the seal casinghousing described in claim 1, the wherein thickness of top cover flange (4) is 0.5~1mm.
5. according to the seal casinghousing described in claim 1 or 4, wherein the flange (6) of the middle casing (2) another end opening
Thickness is 2 times of the thickness of top cover flange (4).
6. according to the seal casinghousing described in claim 1 or 4, wherein the leak detection stomata (9) is arranged on bottom plate (3) or top cover
(1) on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720513965.XU CN206892123U (en) | 2017-05-10 | 2017-05-10 | A kind of accelerometer seal casinghousing of repeatable dismounting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720513965.XU CN206892123U (en) | 2017-05-10 | 2017-05-10 | A kind of accelerometer seal casinghousing of repeatable dismounting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206892123U true CN206892123U (en) | 2018-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720513965.XU Active CN206892123U (en) | 2017-05-10 | 2017-05-10 | A kind of accelerometer seal casinghousing of repeatable dismounting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206892123U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110398608A (en) * | 2019-06-24 | 2019-11-01 | 贵州新安航空机械有限责任公司 | A kind of structure improving velocity sensor installation reliability |
| CN110895284A (en) * | 2018-09-13 | 2020-03-20 | 航天科工惯性技术有限公司 | Accelerometer packaging structure, and sealing detection system and method |
-
2017
- 2017-05-10 CN CN201720513965.XU patent/CN206892123U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110895284A (en) * | 2018-09-13 | 2020-03-20 | 航天科工惯性技术有限公司 | Accelerometer packaging structure, and sealing detection system and method |
| CN110398608A (en) * | 2019-06-24 | 2019-11-01 | 贵州新安航空机械有限责任公司 | A kind of structure improving velocity sensor installation reliability |
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