CN100379610C - Air generator for principal driver - Google Patents
Air generator for principal driver Download PDFInfo
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- CN100379610C CN100379610C CNB2006100114756A CN200610011475A CN100379610C CN 100379610 C CN100379610 C CN 100379610C CN B2006100114756 A CNB2006100114756 A CN B2006100114756A CN 200610011475 A CN200610011475 A CN 200610011475A CN 100379610 C CN100379610 C CN 100379610C
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- igniting
- filtering net
- ignition
- room
- lower house
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Abstract
The present invention relates to a gas generator for a principal driver. A main body of the present invention is mainly composed of an outer shell and a lower shell which are fitted together in a press mode up and down. The inner part of the main body is orderly provided with an igniting room, an annular burning room and a filtering room from a center shaft along a radial direction. An igniting shell, an igniting pipe, igniting medicine are arranged in the igniting room. The present invention is characterized in that ventholes are arranged on the annular peripheral surface of the outer shell, metal foil pieces are attached to the inner sides of the ventholes, the annular burning room is composed of the inner wall of a filtering net, the outer wall of the igniting room, and end cover and the lower shell, and is surrounded around the periphery of the igniting room, simultaneously the upper end part and the lower end part of the filtering net are fixed respectively by the end cover and a lower inner shell, gas generating agents are filled in the annular burning room, and the filtering room is composed of the outer wall of the filtering net and the inner ring of the outer shell. The gas generator for the principal driver of the present invention has the advantages of quick initial pressure establishment, low inner pressure in the burning room, stable repeat of outlet pressure, good filter, less powder dust, low outlet temperature, etc. and is suitable for various gas generating agents.
Description
Technical field
The present invention relates to a kind of air generator for principal driver that aeration gas flow is provided to the safety guard-safeguard buffer system of automobile.
Background technology
The safety guard-safeguard buffer system of automobile generally comprises impact microphone; controller; gas generator; airbag etc.; as shown in Figure 1; when automobile bumps; sensor is measured the inertial acceleration that automobile bumps and produces; and signal conducted to controller; controller is judged the size and the time length of crash acceleration; if the size of acceleration/accel and time length surpass or reach predetermined limit value; controller sends ignition signal and starts gas generator; gas generator starts the back a large amount of gases of generation and charges into airbag; airbag expands rapidly and is deployed in the occupant front, has avoided the occupant because other hard thing of inertial impact force and automobile collides and has produced injures and deaths.
Be better protection occupant, the safety guard-safeguard buffer system of automobile requires the initial pressure of gas generator to set up in fast, the combustion chamber to force down, and delivery pressure repeats to stablize, filters well, dust is few, temperature out is low.
U.S. Pat 6257617 provides adjustable-pressure air bag producer, utilize the Deformation control delivery pressure of gas generator, but the problem that this US Patent mainly exists is: (1) is because the producer internal pressure is higher, and is very high to the casing rigidity requirement, exists the potential safety hazard that housing breaks; (2) very high to the accessory size requirement of enclosure interior, there is poorly sealed problem in the accessory size error when big; (3) owing to need housing distortion to form gas channel, so the mechanical mechanics property of housing is bigger to the gas generating agent combustion effects in the combustion chamber, just can not guarantee a stabilized combustion performance, and make the gas of generation can not obtain a stable delivery curve or feature; (4) because the filtering net in the combustion chamber is subjected to the combustion chamber dimensional restriction, the effect that can not well play cooling and filter, and the gentle residue of combustion that causes giving vent to anger is more, burns airbag easily, has the hidden danger to occupant's burn; Because distortion is bigger, producer might come off from system, the passenger is existed the danger of scald when (5) producer was worked.
Summary of the invention
The technology of the present invention is dealt with problems: overcome the deficiencies in the prior art, provide a kind of and have initial pressure and set up in fast, the combustion chamber and force down, delivery pressure is stable, it is good to filter, and temperature out is low, dust is few, and the little air generator for principal driver of volume.
Technical solution of the present invention: a kind of air generator for principal driver, its main body is made of a body skin and a lower house that is fitted in up and down together, radially be provided with ignition chamber, annulus combustion chamber and filter chamber successively from center shaft in the main body, igniting housing, ignition tube, ignition powder are arranged in the ignition chamber, it is characterized in that: be arranged with air gate on the annular side face of described body skin, described air gate inboard is pasted with tinsel; Described annulus combustion chamber is made of the inwall of filtering net, outer wall, end cap and the following inner housing of ignition chamber, encircle be centered around ignition chamber around, the upper and lower end parts of filtering net by end cap and following inner housing location, is equipped with gas generant respectively in the annulus combustion chamber simultaneously; Described filter chamber is made of the outer wall of filtering net and the interior annulus of body skin.
Described air gate is evenly distributed, and the aperture can be regulated according to the gas generant performance requriements.Can reduce the interior pressure that producer is done the time spent when the aperture increases, the interior pressure that then can increase producer is reduced in the aperture.
Described tinsel is shaped as annular, and its width is 2～3 times of air gate aperture, can play sealing function like this.Tinsel generally adopts corrosion-resistant steel and aluminium foil.
Described filtering net is an annular, is formed by the mould compacting of metal filament establishment back, and cylindrical is a ledge structure.The present invention has directly utilized the inner space of filtering net as combustion chamber, has reduced part, has alleviated weight, and the filtering net fixed limit can be lived by ledge structure; Filtering net helps reducing in the producer in-to-in and presses directly as combustion wall in addition, because open area is bigger, residue and immobilized particles after the burning is also had good filtration simultaneously.Therefore this filtering net makes the characteristics that the present invention forces down in having had, filterability is good.
Described body skin top is an epirelief circular arc, and the arc surface outermost is bent downwardly, extend axially certain distance again after radial extension become a ring-shaped platform.The convex-shaped arc surface has the good mechanical performance, and stress is difficult for concentrating, the tensile strength height, and also easy with die forming than planar shaped; Ring-shaped platform then is convenient to and the butt flange convenient welding that closely cooperates; Therefore this body skin is to the invention provides a good profile space.
The bottom of described lower house is a concave arc shape, axially extends to needed distance behind the arc surface outermost K/UP.Concave arc has the good mechanical performance just as sample, and stress is difficult for concentrating, the tensile strength height, and die forming is also easy than planar shaped, and this lower house has played the effect in closed interior space for the present invention.
One ring-band shape coincidence side face is formed at the bottom that described lower house top is pressed into body skin; Body skin constitutes the V-type bevel for welding that is suitable for welding to the arc surface of axial bending and the arc surface of lower house K/UP.The welding of V-type bevel for welding can just in time form a vee-type weld seam, this shape can make the weld seam molten bath darker, make weld seam have good tensile strength, require lower to the welding quality of fit simultaneously, bevel for welding than other several types has more advantage, so the good tensile strength of this bevel for welding makes the present invention can bear higher interior pressure.
Described ignition tube is by collar and igniting housing flush fit, and being fixed is pressed in the igniting lower part of frame.
All seal between described filtering net, igniting housing, interior lower house and the lower house by sealant or packing seal.
The present invention's advantage compared with prior art is:
(1) the abundant ingenious producer inner space that utilized of the present invention opens air gate at the body skin side face, and the gas of Peng Zhanging directly enters airbag like this, to the occupant up to the safety precaution effect; At body skin inner peripheral surface metal clad paillon foil, not only play the leak free effect, and after guaranteeing that gas generant is lighted, it is lower that the initial pressure of combustion chamber is set up fast, interior pressure simultaneously, solved housing because the problem of the high producer distortion of internal pressure.This mainly be because: after producer is activated, after gas generant is lighted, the pressure of combustion chamber increases sharply, the air communication filtering net, break through body skin inner peripheral surface tinsel and enter into airbag, the pressure that therefore breaks through tinsel is the enclosure interior pressure limit value, and it is not high to break through the pressure of tinsel, generally can be controlled between 5MPa～20MPa, also just solve the high-voltage problem of enclosure interior.
(2) comformability is strong, can adapt to the gas generant performance requriements of different combustion speed.Because the aperture of air gate and tinsel characteristic and combustion chamber internal pressure have linear relationship, produce the desired pressure delivery curve that is fit to buffer system work, and adopt the air gate in different apertures and the tinsel of varying strength can regulate combustion chamber prrassure.
(3) because filtering net directly as outer wall of combustion chamber, is fixed on around the gas generant, made full use of the producer volume inside, the producer volume is reduced; And filtering net is cylindrical shape, and cylindrical has step, can directly be positioned in the producer lower house, has more effectively reduced the gas generator volume.In addition, filtering net is worked out by metal filament, itself has elasticity, as combustion chamber wall, can remedy the error of igniting shell dimension, guarantee the tightness of bottom packing seal, and filtering net can help the cooling of high-temperature gas and the filtration of residue according to suitable thickening of performance need or increase density.
(4) location is reliable, and assembling is simple, convenient.Adopted resilient combustion chamber lid, helped the location of combustion chamber, lower house in cooperating has again guaranteed the easy to assembly of igniting housing and gas generant.
Description of drawings
Fig. 1 is a safety guard-safeguard buffer system workflow diagram;
Fig. 2 is a structural representation of the present invention;
Fig. 3 is a working state schematic representation of the present invention;
Fig. 4 looks cutaway view for filtration host of the present invention;
Fig. 5 is the birds-eye view of filtering net of the present invention;
Fig. 6 is the pressue-graph (+23 ℃) after the present invention lights a fire in the 60L leakproof tank;
Fig. 7 is the filtering net figure after the work of the present invention.
Wherein, 1 main body, 2 body skiies, 3 filtering nets, 4 end caps, 5 gas generants, 6 igniting housings, 7 igniting housing caps, 8 ignition powders, 9 aluminium foils, 10 body skin inside faces, 11 tinsels, 12 air gates, 13 body skin flange flanges, 14 butt flanges, 15 bevel for weldings, 16 packing seals, 17 interior lower houses, 18 lower house centre holes, 19 igniting housing bottom surface boss, 20 plastic plugs, 21 ignition tube pins, 22 gas generators, 23 ignition tubes, 24 little packing seals, 25 igniting housing bottom surfaces, 26 igniting housing bottom boss external diameters, 27 lower houses, 28 lower houses annular side face, 29 collars, the 30 igniting housings apertures of giving vent to anger, 31 igniting housing cap flange side faces, 32 combustion chambers, 33 igniting housing side faces, 34 igniting housing circular conical surfaces, arc surface on 35 body skiies, 36 body skin side faces, 37 lower house circular-arc bottom face, 38 igniting housing radial extension faces, 39 ignitions chamber, 40 lower house inner arc surfaces, 41 interior lower house circular-arc bottom face, 42 interior lower house side faces, lower house center hole in 43,44 igniting housing small boss, 45 end cap bottom surfaces, 46 end cap side faces, 47 igniting housing inner peripheral surfaces, 48 igniting housing caps are dug chimb, side face on 49 filtering nets, side face under 50 filtering nets, 51 filtering net inner peripheral surfaces, 52 filter chambers.
The specific embodiment
As Fig. 2, shown in Figure 3, the present invention is made of main body 1, its main body 1 is made of a body skin 2 and a lower house 27 that is fitted in up and down together, the similar inverted cup-shaped of the shape of body skin 2, its top is an epirelief circular arc, the arc surface outermost is bent downwardly, extend axially certain distance again after radial extension become a ring-shaped platform.The side face 36 of body skin 2 is cylindrical, the air gate 12 of some is evenly distributed on the side face of body skin 2 by merry-go-round arrangement, flange flange 13 positions of body skin 2 are at air gate 12 times (referring to Fig. 2), and the effect of flange flange 13 is welded after mainly fitting for the ease of body skin 2 and butt flange 14.One deck corrosion-resistant steel paillon foil 11 is being pasted in air gate 12 inboards on body skin 2 side faces, and this tinsel 11 is an annular, just in time the outside of pore and isolated the coming in inside of producer can be guaranteed the sealing of producer in-to-in.
The bottom of lower house 27 is a concave arc shape, is made up of circular arc bottom surface 37 and ring-type side face 28, and bottom surface 37 is recessed circular arc, and the heart has a circular hole 18 therein, constitutes the passage that connects with the signal wire (SW) plug.Axially extend to certain distance behind the circular-arc bottom face 37 outermost K/UPs.Side face 36 internal diameters of the external diameter of the side face 28 of lower house 27 and body skin 2 about equally, one ring-band shape coincidence side face is formed at the bottom that lower house 27 tops are pressed into body skin 2, and body skin 2 constitutes the V-type bevel for welding 15 that is suitable for welding to the arc surface of axial bending and the arc surface of lower house 27 K/UPs.
Radially be provided with ignition chamber 39, combustion chamber 32, filter chamber 52 successively from center shaft in the main body 1, igniting housing 6, ignition tube 23, ignition powder 8, igniting housing cap 7 are arranged in the ignition chamber 39, collar 29 be pressed into ignition tube 23 and the igniting housing 6 side face 33 between ignition tube 23 is fixed, the igniting housing cap 7 at ignition chamber 39 tops is sealed in ignition powder 8 in the igniting housing 6, housing cap 7 has a protruding flange 48, and flange side face 31 matches with igniting housing inner peripheral surface.Ignition powder 8 is boron/potassium nitrate.
Igniting housing 6 is a tubular structure, form by side face 33, bottom surface 25, circular conical surface 34, side face small boss 44 and bottom boss 19, the aperture 30 of circle distribution is arranged as outlet passageway on igniting housing 6 side faces, ignition chamber 39 and igniting housing 6 space outerpaces have been communicated with, aluminium foil 9 adhering and sealings of aperture 30 outsides usefulness annular of giving vent to anger, the boss 19 of igniting housing 6 bottom surfaces is stuck in the centre hole 18 of lower house 27 bottom surfaces.Between ignition tube 23 and the igniting housing 6 the little packing seal 24 of one deck is arranged, played sealing function ignition chamber 39.
The bottom surface 25 of igniting housing 6 is ignition chamber side face 33 outside extension positions, and bottom surface 25 side faces have small boss 44, and following inner housing 17 limits small boss 44 above it, and the downside of bottom surface 25 is pressed on the interior arc-shaped surface 40 of lower house 27.Rubber gasket or leakproofing material 16 are placed between the inside face 40 of igniting housing bottom surface portions 25 and lower house 27, and the power that is pressed on the bottom surface 25 by lower house 27 makes packing seal 16 distortion, thereby play the effect of sealed damp-proof.
Shown in Fig. 4,5, filtering net 3 is a loop configuration, and cylindrical has step, is made up of last side face 49 and following side face 50.Filtering net 3 is fixed in the lower house 27 as combustion chamber 32 chamber outer walls, the external diameter of 3 times side faces 50 of filtering net is less than lower house side face 28 internal diameters, 3 times side faces 50 of filtering net can be inserted in side face 28 inboards at lower house 27, and at interval middle one deck packing seal 16 can play heat insulation and the leak free effect.Filtering net 3 outer peripheral faces and body skin air gate have a fixed gap, and 3 inner peripheral surfaces of filtering net directly constitute combustion chamber wall 32, can give full play to the cooling of filtering net and the effect of filtration.
When crashing, when the acceleration/accel of generation met or exceeded the preset limit value of controller, the present invention was just started by the ignition signal that air bag system sends, referring to the airflow arrows direction of Fig. 3.After ignition powder 8 was lighted, high temperature gas flow broke through aluminium foil 9 on igniting housing 6 side faces by aperture 30, enters into combustion chamber 32.Gas generant 5 in the high temperature gas flow ignition combustion chamber 32, gas generant 5 burnings produce a large amount of gases, in osed top combustion chamber 32, form high pressure, at the pressure of combustion chamber 32 between 5MPa～20MPa, by filtering net 3, break through the corrosion-resistant steel paillon foil 11 on body skin 2 inner peripheral surfaces in this high pressure downstream again, enter into then in the airbag as air bag system, airbag expands and launches, and the occupant is played the safety precaution effect.
Thereby burn-on with laser-beam welding machine at circumference bevel for welding 15 places that body skin 2 and interior lower house 17 forms and to constitute complete gas generator.Producer is used the current point fire in insulation under 23 ℃ of temperature after 4 hours in the 60L leakproof tank, data as shown in Figure 6.
Container inner pressure is P
1max=0.186MPa reaches P
1max95% time t
95%max=51.7ms, container pressure time of origin 6.1ms.A large amount of solid residues that filtered online collection, as shown in Figure 7.
Claims (6)
1. air generator for principal driver, its main body (1) is made of a body skin (2) and a lower house (27) that is fitted in up and down together, radially be provided with ignition chamber (39), annulus combustion chamber (32) and filter chamber (52) successively from center shaft in the main body (1), igniting housing (6), ignition tube (23), ignition powder (8) are arranged in the ignition chamber (39); Be arranged with air gate (12) on the annular side face (36) of described body skin (2), the inboard of described air gate (12) is pasted with tinsel (11); Described annulus combustion chamber (32) encircle be centered around ignition chamber (39) around, described annulus combustion chamber (32) reaches inner housing (17) formation down by inwall, the outer wall of ignition chamber (39), the end cap (4) of filtering net (3), the upper and lower end parts of filtering net (3) by end cap (4) and following inner housing (17) location, is equipped with gas generant (5) respectively in the annulus combustion chamber (32); Described filter chamber (52) is made of the outer wall (52) of filtering net (3) and the interior annulus of body skin (2), it is characterized in that:
Described filtering net (3) is an annular, is formed by the mould compacting of metal filament establishment back, and described filtering net (3) cylindrical is a ledge structure;
Also have collar (29) and ignition body cap (7) in the described ignition chamber (39), described ignition tube (23) is fixed and is pressed in the bottom of igniting housing (6), by collar (29) and igniting housing (6) flush fit, igniting housing cap (7) is inserted in igniting housing (6), is compacted ignition powder (8) below the igniting housing cap (7);
All seal between described filtering net (3), igniting housing (6), interior lower house (17) and the lower house (27) by sealant or packing seal.
2. gas generator according to claim 1 is characterized in that: described air gate (12) is evenly distributed.
3. gas generator according to claim 1 is characterized in that: described tinsel (11) be shaped as annular, its diameter is 2～3 times of air gate (12) aperture.
4. gas generator according to claim 1 is characterized in that: described body skin (2) top is last convex arc surface, and the arc surface outermost is bent downwardly, extend axially certain distance again after radial extension become a ring-shaped platform.
5. gas generator according to claim 1 is characterized in that: the bottom of described lower house (27) is a concaved circular cambered surface, axially extends to needed distance behind the arc surface outermost K/UP.
6. gas generator according to claim 1 is characterized in that: ring-band shape coincidence side face is formed at the bottom that described lower house (27) top is pressed into body skin (2); Body skin (2) is inboard to constitute the V-type bevel for welding (15) that is suitable for welding to the arc surface of radial outside bending and the arc surface of lower house outside K/UP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100114756A CN100379610C (en) | 2006-03-10 | 2006-03-10 | Air generator for principal driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100114756A CN100379610C (en) | 2006-03-10 | 2006-03-10 | Air generator for principal driver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1817697A CN1817697A (en) | 2006-08-16 |
| CN100379610C true CN100379610C (en) | 2008-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100114756A Active CN100379610C (en) | 2006-03-10 | 2006-03-10 | Air generator for principal driver |
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| Country | Link |
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| CN (1) | CN100379610C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4332189B2 (en) * | 2007-08-09 | 2009-09-16 | トヨタ自動車株式会社 | Inflator and vehicle airbag apparatus using the same |
| JP5016620B2 (en) * | 2009-01-15 | 2012-09-05 | 株式会社ダイセル | Gas generator for vehicle restraint system |
| JP5985950B2 (en) | 2012-10-04 | 2016-09-06 | 株式会社ダイセル | Gas generator and its assembly method |
| CN105835827B (en) * | 2015-01-13 | 2018-03-27 | 湖北航天化学技术研究所 | One kind miniaturization gas generator |
| JP6563825B2 (en) * | 2015-02-09 | 2019-08-21 | 株式会社ダイセル | Gas generator |
| CN105818776B (en) * | 2016-04-20 | 2018-05-22 | 芜湖金鹏汽车部件有限公司 | A kind of inflation dynamics adjustable automobile air bag |
| CN105818779A (en) * | 2016-04-20 | 2016-08-03 | 芜湖金鹏汽车部件有限公司 | Intelligent gas generation device special for automobile safety air bag |
| CN110371073B (en) * | 2019-07-01 | 2021-11-09 | 均胜汽车安全系统(湖州)有限公司 | Exhaust hole structure of pyrotechnic gas generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1029493A (en) * | 1996-04-08 | 1998-02-03 | Daicel Chem Ind Ltd | Gas generator for air bag and airbag device |
| CN1207996A (en) * | 1997-08-12 | 1999-02-17 | 大赛璐化学工业株式会社 | Air bag gas generator |
| US6056319A (en) * | 1997-09-24 | 2000-05-02 | Trw Airbag Systems Gmbh & Co. Kg | Gas generator for a safety device |
| US6283505B1 (en) * | 1996-11-14 | 2001-09-04 | Nippon Kayaku Kabushiki-Kaisha | Gas generator for air bag |
| JP2002370607A (en) * | 2001-06-14 | 2002-12-24 | Nippon Kayaku Co Ltd | Gas generator |
| CN2654450Y (en) * | 2003-11-13 | 2004-11-10 | 西安北方庆华电器（集团）有限责任公司 | Safety gas bag gas generator |
-
2006
- 2006-03-10 CN CNB2006100114756A patent/CN100379610C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1029493A (en) * | 1996-04-08 | 1998-02-03 | Daicel Chem Ind Ltd | Gas generator for air bag and airbag device |
| US6283505B1 (en) * | 1996-11-14 | 2001-09-04 | Nippon Kayaku Kabushiki-Kaisha | Gas generator for air bag |
| CN1207996A (en) * | 1997-08-12 | 1999-02-17 | 大赛璐化学工业株式会社 | Air bag gas generator |
| US6056319A (en) * | 1997-09-24 | 2000-05-02 | Trw Airbag Systems Gmbh & Co. Kg | Gas generator for a safety device |
| JP2002370607A (en) * | 2001-06-14 | 2002-12-24 | Nippon Kayaku Co Ltd | Gas generator |
| CN2654450Y (en) * | 2003-11-13 | 2004-11-10 | 西安北方庆华电器（集团）有限责任公司 | Safety gas bag gas generator |
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| Publication number | Publication date |
|---|---|
| CN1817697A (en) | 2006-08-16 |
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Owner name: XIANGYANG AEROSPACE AND CHEMICAL PROPULSION CORPOR Free format text: FORMER OWNER: NO.42 INST. NO.4 INST. CHINA AEROSPACE SCIENCE + TECHNOLOGY GROUP CORP. Effective date: 20120808 |
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Effective date of registration: 20120808 Address after: 441003 Xiangyang province Hubei city Fancheng District Qinghe Road Patentee after: Xiangyang Aerospace Chemical Power General Co., Ltd. Address before: 156 mailbox 441003, Hubei City, Xiangfan Province Patentee before: No.42 Institute of China Academy of Launch Vehicle Technology |
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Address after: 441003 Xiangyang province Hubei city Fancheng District Qinghe Road Patentee after: HUBEI HANGPENG CHEMICAL POWER TECHNOLOGY CO., LTD. Address before: 441003 Xiangyang province Hubei city Fancheng District Qinghe Road Patentee before: Xiangyang Aerospace Chemical Power General Co., Ltd. |