CN107575530A - With the composite damper for sacrificing structure - Google Patents
With the composite damper for sacrificing structure Download PDFInfo
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- CN107575530A CN107575530A CN201710890777.3A CN201710890777A CN107575530A CN 107575530 A CN107575530 A CN 107575530A CN 201710890777 A CN201710890777 A CN 201710890777A CN 107575530 A CN107575530 A CN 107575530A
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- Prior art keywords
- sacrifice
- protection component
- composite damper
- shock bracket
- overload
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- Vibration Dampers (AREA)
Abstract
The present invention relates to a kind of composite damper structure for having and sacrificing structure, it is characterised in that including：Shell structure, shock bracket and sacrifice structure；The shock bracket is arranged on inside shell structure, for supporting by protection component；The sacrifice structure setting is by between the bottom of protection component and shell structure；After axial high impact overload is born, sacrifice structure and produce plastic deformation.The shock-damping structure of the present invention has small volume; the characteristics of in light weight; in addition to such as common damper is to the filter capacity of random vibration, there is certain disposable superelevation overload protection ability, the mechanics sensory system application being primarily adapted for use on missile-borne IMU or other missile-borne platforms.
Description
Technical field
The present invention relates to a kind of composite damper for having and sacrificing structure, belong to vibration-proof structure technical field.
Background technology
IMU (Inertial Measurement Unit) module is Inertial Measurement Unit, is mainly used in gathering posture letter
Breath, is converted into data, there is provided and to the processor of total system, attitude algorithm is completed, coordinates satellite navigation to form integrated navigation system,
Sensor main in IMU will include being angular rate sensor, acceleration transducer, magnetic line of force sensor, baroceptor etc..
Because MEMS is mechanics Sensitive Apparatus, carrying platform transmitting/in-flight vibrations and overload to based on
MEMS IMU inertia measurement precision, which is even survived, produces obvious influence, and the anti-overloading performance of high-precision MEMS is general
All over not high, existing damping scheme can not ensure survival ability of the high-precision MEMS under the conditions of high overload.
For improve random vibration under the conditions of IMU measurement accuracy and superelevation overload (such as shell transmitting) under the conditions of it is reliable
Property, it is badly in need of providing a kind of brand-new damping scheme.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide it is a kind of have sacrifice structure composite damper,
Realize to superelevation overload protection ability.
The object of the invention is achieved by following technical solution：
A kind of composite damper structure for having and sacrificing structure is provided, including：Shell structure, shock bracket and sacrifice are tied
Structure；
The shock bracket is arranged on inside shell structure, for supporting by protection component；
The sacrifice structure setting is by between the bottom of protection component and shell structure；Bearing axial high impact overload
Afterwards, sacrifice structure and produce plastic deformation.
Preferably, the foamed aluminium that the material of structure uses is sacrificed.Preferably, it is described sacrifice structure be shaped as annular or circle
Piece.
Preferably, yield strength of structure P is sacrificedMMeet PM<m*a/s；Wherein m is by the quality of protection component, a Gao Chong
The value of overload is hit, s is by protection component and the contact area for sacrificing structure.
Preferably, it is less than when the overload that sacrifice structure is born is more than 10000G under 18000G overloads, it is strong sacrifices structure yields
Spend PMFor 183Mpa ± 10%, the foamed aluminum materials that structure uses the aluminium of relative density 0.17 are sacrificed, are tied by protection component with sacrificing
The contact area of structure is not more than 67mm2。
Preferably, sacrifice structure to be arranged in shell structure, after axial high impact overload is born, sacrifice structure and produce modeling
Property deformation and with being departed from by protection component.
Preferably, in addition to；Shock bracket includes mount support, multiple pilot pins and multiple beams；The assembling branch
It is through hole in the middle part of frame, is set in by protection component in through hole, is pressed in the top of the sacrifice structure；Mount support circumferentially divides
The multiple positioning holes of cloth, each positioning hole is interior to set a beam；Beam is set on pilot pin, and multiple pilot pins are used for branch
Support whole shock bracket.
Preferably, the pilot pin passes through the positioning hole of mount support, and perfusion silicon rubber is between pilot pin and positioning hole
Form beam.
Preferably, beam and by protection component into resonant frequency f meetK is the firm of beam
Degree, m is by the quality of protection component, according to the rigidity k for the vibration frequency band adjustment beam for needing to filter out by protection component.
Preferably, symmetrical support lug structure is had by protection component, support lug structure is fixedly installed in the flange of shock bracket
On.
Preferably, the shell structure includes upper shell and lower house, and lower house has multiple counter sinks, each counter sink
One pilot pin of screw connection can be passed through.
The present invention has the following advantages that compared with prior art：
(1) shock-damping structure of the invention has the characteristics of small volume, in light weight, except if common damper is to random vibration
Outside filter capacity, there is certain disposable superelevation overload protection ability, be primarily adapted for use in missile-borne IMU or other missile-borne platforms
On mechanics sensory system application.
(2) shock-damping structure of the invention, by the way that the material component of beam for different load quality m, can be adjusted,
Change damper stiffness k, according toEnsure that the ratio between random vibration frequency and f are more than
Material component by sacrificing structure adjusts and sectional area adjusts, and is suitable for different shell launching conditions.
Brief description of the drawings
Fig. 1 is the overall assembly figure that the present invention has the composite damper for sacrificing structure；
Fig. 2 is the present invention with the shock absorbing bracket structure schematic diagram in the composite damper for sacrificing structure；
Fig. 3 is the present invention with the upper shell structural representation in the composite damper for sacrificing structure；
Fig. 4 is the present invention with the lower house structural representation in the composite damper for sacrificing structure；
Fig. 5 (a) is the top view of shock bracket of the present invention；Fig. 5 (b) is the sectional view of shock bracket of the present invention；
Fig. 6 is that the present invention has the shock bracket in the composite damper for sacrificing structure and the assembling signal by protection component
Figure；
Fig. 7 is scheme of installation of the present invention with shock bracket in the composite damper for sacrificing structure to lower house；
Fig. 8 is the present invention by the scale diagrams of protection component (6)；
Fig. 9 (a) is the top view that the present invention has the composite damper for sacrificing structure；Fig. 9 (b) has for the present invention to be sacrificed
The profile of the composite damper of structure；
Figure 10 is that the present invention has the upper shell of composite damper and the assembling schematic diagram of lower house for sacrificing structure；
Figure 11 (a) is lower house of the present invention and sacrifices structure scheme of installation；Figure 11 (b) is lower house of the present invention and sacrifice
Profile after structure installation.
Embodiment
The present invention proposes a kind of composite damper for having and sacrificing structure, by upper shell 1, lower house 2, shock bracket 3, subtracts
Shake pad 4, sacrifice structure 5 are formed, and wherein beam 4 is directly molded in shock bracket 3 by mould, is played in the work environment
To the physical protection of internal funtion part, make whole component in transmission, transport, use into an entirety.The invention has body
Product is small, easily assembling, and in light weight, mechanical strength is big, the feature of anti high overload.
It is generally acknowledged that the overload of random vibration is less than 5000G, frequency 10Hz-2000Hz, approximate semisinusoidal width is less than
1ms, beam 4 mainly isolates this kind of vibration, and to ensure during vibrations, and the angle of shock bracket 3 is not more than partially
0.05°。
In addition the disposable protection of superelevation overload refers to, absorbs energy by the plastic deformation for sacrificing structure (5), will
20000G semisinusoidals width is 8ms-10ms overload, decays to less than 12000G, makes to load on by the actual mistake of protection component 6
In the range of being loaded in it and can bearing, so as to avoid the failure under superelevation overload condition, due to sacrificing the plastic deformation of structure 5 only
It can occur once, therefore can be only formed disposable superelevation overload protection.
Before experience superelevation overload, shock bracket 3 directly contacts between structure 5 is sacrificed, in superelevation overload work, by
Beam 4 and sacrifice structure 6 bear to overload caused inertia force jointly, and elastic deformation occurs respectively in the presence of inertia force
And plastic deformation, after the unloading of superelevation overload stresses, sacrifice structure 6 and plastic deformation has occurred and has been separated with shock bracket 3, now
Shock bracket 3 is carried and by protection component 6 by beam 4 completely, plays the function of isolation random vibration.Beam 4 is storing
The opposite direction in high overload acceleration direction is inclined under state, the deformation stroke of structure 6, but the deformation stored for a long time are sacrificed with increase
Smaller, creep will not cause defective shock absorber.
As shown in figure 1, it is the citation form of the overall assembly figure of the present invention, the i.e. present invention, it is by upper shell 1, lower house
2, shock bracket 3, beam 4, sacrifice structure 5 are formed, and wherein beam 4 is directly molded in shock bracket 3 by mould, such as
Shown in Fig. 5.It is installed on by protection component 6 using the countersunk head screw of M2 × 4 on the flange of shock bracket 3, such as Fig. 6, then by damping branch
Frame 3 is arranged on the beam positioning hole of lower house 2 and upper shell 1, by taking the locating slot on lower house 2 as an example, such as Fig. 7, finally will
Upper shell 1 and lower house 2 are connected by M2 × 4, complete module assembling, such as Figure 10.Integral module profile such as Figure 11.This programme
In, in addition to beam 4, remaining structure material is 7A04 duralumin.
The main material that the sacrifice structure of the present invention uses is foamed aluminium, and energy-absorbing mode is plastic deformation, in once Gao Chong
After hitting overload, certain plastic deformation can be produced by sacrificing structure, it is therefore desirable to be expired by adjusting the specific mechanical characteristic of material
Foot is actually needed.Sacrifice yield strength of structure PMMeet PM<m*a/s；Wherein m is that a is HI high impact by the quality of protection component 6
The value of load, s are by protection component 6 and the contact area for sacrificing structure 5.
With maximum overload 15000G, protected module quality 100g, shell goes out thorax speed 900m/s, length of barrel 8m and is
Example, it is the overload that 1.5mm can meet to unload more than 10000G that structural type variable is sacrificed in design, and stroke does not influence to exceed damping
The type variable that device (shock bracket and beam) allows.
Such as：Under 15000G overloads, the inertia force of 100g loads is 14700N, sacrifices structure for annular, annular diameters
17mm, outer annular diameter 19mm.Sectional area 56.5mm2, overload the pressure P to sacrificing structural section0=14700N/56.5mm2=
260Mpa, design yield strength PMFor P0* 0.707=183MPa.The foamed aluminum materials used in this example are the aluminium of relative density 0.17
Material, effective strain 0.05-0.7, stopping means need to be designed, avoid strain more than 0.7, can when 50% strain occurs for the aluminium
About 2.5MJ/cm3 energy is absorbed, laboratory 15000G, 20us impact about generate 0.4mm deformation.
Density of material, the constant bar of relative density are adjusted by the ratio and granular size that adjust sodium chloride when preparing material
Part lowers whole alloying component and can adjust yield strength.General foamed aluminum materials density is smaller, and yield region is wider, in yield region, bubble
Foam aluminium is sustainable to be strained, and yield strength is constant, and using this material property, the overload that can be protected as needed is set
The yield strength of material is put, and the pressure of contact surface is adjusted by adjusting the sectional area of sacrifice structure.
Structure is sacrificed as disposable cushioning product, can be used in shell transmitting etc., disposably by large impact
Occasion, can realize to 200us no more than 20000G overload decay, attenuation rate 50%~70%.
It is described above, it is only the optimal embodiment of the present invention, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.
The content not being described in detail in description of the invention belongs to the known technology of professional and technical personnel in the field.
Claims (10)
1. a kind of have the composite damper structure for sacrificing structure, it is characterised in that including：Shell structure, shock bracket (3) and
Sacrifice structure (5)；
The shock bracket (3) is arranged on inside shell structure, for supporting by protection component (6)；
The sacrifice structure (5) is arranged on by between the bottom of protection component (6) and shell structure；Bearing axial HI high impact
After load, sacrifice structure (5) and produce plastic deformation.
2. composite damper structure according to claim 1, it is characterised in that sacrifice the foam that the material of structure uses
Aluminium.Preferably, it is described sacrifice structure be shaped as annular or disk.
3. composite damper structure according to claim 2, it is characterised in that sacrifice yield strength of structure PMMeet PM<m*
a/s；Wherein m is by the quality of protection component (6), and a is the value of high impact overload, and s is with sacrificing structure by protection component (6)
(5) contact area.
4. composite damper structure according to claim 2, it is characterised in that when the overload that sacrifice structure is born is more than
10000G is less than under 18000G overloads, sacrifices yield strength of structure PMFor 183Mpa ± 10%, sacrifice structure and use relative density
The foamed aluminum materials of 0.17 aluminium, 67mm is not more than with sacrificing the contact area of structure (5) by protection component (6)2。
5. composite damper structure according to claim 1 or 2, it is characterised in that sacrifice structure (5) and be arranged on housing knot
On structure, after axial high impact overload is born, sacrifice structure (5) and produce plastic deformation and with being departed from by protection component (6).
6. composite damper structure according to claim 1 or 2, it is characterised in that also include；Shock bracket (3) includes
Mount support (3-1), multiple pilot pins (3-2) and multiple beams (4)；It is through hole in the middle part of the mount support (3-1), is protected
Protecting assembly (6) is set in through hole, is pressed in the top of the sacrifice structure (5)；Mount support (3-1) it is circumferentially distributed multiple
Positioning hole, each positioning hole is interior to set a beam (4)；Beam (4) is set on pilot pin (3-2), multiple pilot pins
(3-2) is used to support whole shock bracket (3).
7. composite damper structure according to claim 6, it is characterised in that the pilot pin (3-2) passes through assembling branch
The positioning hole of frame (3-1), perfusion silicon rubber form beam (4) in pilot pin (3-2) between positioning hole.
8. composite damper structure according to claim 7, it is characterised in that beam (4) and by protection component into
Resonant frequency f meetsK is the rigidity of beam, and m is by the quality of protection component, according to by protection component need
The rigidity k of the vibration frequency band to be filtered out adjustment beam (4).
9. composite damper structure according to claim 7, it is characterised in that symmetrical branch is had by protection component (6)
Ear structure, support lug structure are fixedly installed on the flange of shock bracket (3).
10. the composite damper structure according to claim 7 or 9, it is characterised in that the shell structure includes upper shell
(1) and lower house (2), lower house (2) have multiple counter sinks, and each counter sink can pass through one pilot pin (3- of screw connection
2)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710890777.3A CN107575530B (en) | 2017-09-27 | 2017-09-27 | With the composite damper for sacrificing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710890777.3A CN107575530B (en) | 2017-09-27 | 2017-09-27 | With the composite damper for sacrificing structure |
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| Publication Number | Publication Date |
|---|---|
| CN107575530A true CN107575530A (en) | 2018-01-12 |
| CN107575530B CN107575530B (en) | 2019-07-23 |
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ID=61039695
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710890777.3A Active CN107575530B (en) | 2017-09-27 | 2017-09-27 | With the composite damper for sacrificing structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518450A (en) * | 2018-04-20 | 2018-09-11 | 武汉中航传感技术有限责任公司 | A kind of antivibration mount and fiber Bragg grating (FBG) demodulator |
| CN109039347A (en) * | 2018-07-31 | 2018-12-18 | 温州大学瓯江学院 | A kind of transmitting set |
| CN112483570A (en) * | 2020-11-12 | 2021-03-12 | 中国船舶重工集团公司第七0七研究所 | Rubber vibration damping system and horizontal rigidity adjusting method thereof |
| CN113090709A (en) * | 2021-04-12 | 2021-07-09 | 西安航弓机电科技有限公司 | Inertia module with vibration isolation structure |
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| CN103134540A (en) * | 2012-12-05 | 2013-06-05 | 中北大学 | High overload integrated protective structure |
| CN203239819U (en) * | 2013-05-17 | 2013-10-16 | 山东神戎电子股份有限公司 | Rubber damper for components inside device |
| CN104775534A (en) * | 2015-02-27 | 2015-07-15 | 东南大学 | Vibration-reducing and energy-consuming column device of assembled foamed aluminum composite material |
| CN104989782A (en) * | 2015-06-19 | 2015-10-21 | 苏州亚思科精密数控有限公司 | Shock-absorbing pad for machine tool |
| CN205534001U (en) * | 2016-02-05 | 2016-08-31 | 广州共盈金属制品有限公司 | Diesel generating set's damping installation device |
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2017
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103134540A (en) * | 2012-12-05 | 2013-06-05 | 中北大学 | High overload integrated protective structure |
| CN203239819U (en) * | 2013-05-17 | 2013-10-16 | 山东神戎电子股份有限公司 | Rubber damper for components inside device |
| CN104775534A (en) * | 2015-02-27 | 2015-07-15 | 东南大学 | Vibration-reducing and energy-consuming column device of assembled foamed aluminum composite material |
| CN104989782A (en) * | 2015-06-19 | 2015-10-21 | 苏州亚思科精密数控有限公司 | Shock-absorbing pad for machine tool |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518450A (en) * | 2018-04-20 | 2018-09-11 | 武汉中航传感技术有限责任公司 | A kind of antivibration mount and fiber Bragg grating (FBG) demodulator |
| CN109039347A (en) * | 2018-07-31 | 2018-12-18 | 温州大学瓯江学院 | A kind of transmitting set |
| CN112483570A (en) * | 2020-11-12 | 2021-03-12 | 中国船舶重工集团公司第七0七研究所 | Rubber vibration damping system and horizontal rigidity adjusting method thereof |
| CN112483570B (en) * | 2020-11-12 | 2022-04-12 | 中国船舶重工集团公司第七0七研究所 | Rubber vibration damping system and horizontal rigidity adjusting method thereof |
| CN113090709A (en) * | 2021-04-12 | 2021-07-09 | 西安航弓机电科技有限公司 | Inertia module with vibration isolation structure |
| CN113090709B (en) * | 2021-04-12 | 2024-04-09 | 西安航弓机电科技有限公司 | Inertial module with vibration isolation structure |
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| Publication number | Publication date |
|---|---|
| CN107575530B (en) | 2019-07-23 |
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