Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of collision situation that can be specific according to the occupant is provided, discharge the gas of different pressures, casing rigidity is not had harshly require, manufacturing process is simple, the twin-stage type gas generator of low cost of manufacture, stable performance.
Technical solution of the present utility model is: a kind of twin-stage type gas generator, and its main body is made of a upper shell and a lower house that is fitted in up and down together, is provided with major-minor ignition chamber, main and auxiliary combustor and major-minor filter chamber in the main body; Major-minor permanent seat, major-minor squib, igniting tablet are arranged in the major-minor ignition chamber; Gas generating agent is housed in the main and auxiliary combustor, it is characterized in that: a division board is arranged between the described main body, body portion is split into two cavitys of major-minor, formation two is combustion chamber unit independently.
The main cavity of division board of the present utility model upper end is a major air cell, the main ignition hole subtend major air cell at top, primary ignition chamber, major air cell mainly by the upper end of the inwall of last filtering net, major-minor ignition chamber face the wall and meditate, combustion chamber lid and division board constitute, encircle be centered around main center's axis around.
The secondary cavity of division board of the present utility model lower end is an aux. chamber of Diesel engine, the secondary permanent seat of the main permanent seat of primary ignition chamber, secondary ignition chamber is loaded between lower house and the division board and places in the aux. chamber of Diesel engine, the auxiliary point fire hole subtend aux. chamber of Diesel engine of secondary ignition chamber, aux. chamber of Diesel engine mainly is made of down inwall, the outer wall of main permanent seat, secondary ignition chamber cover outer wall, lower house and the division board of filtering net, be centered around main center's axis around.
Two through holes that are used to install and fix main permanent seat and secondary permanent seat are arranged in the middle of the described division board.
The secondary squib end overcoat one annular igniting tablet of secondary ignition chamber of the present utility model.
The utility model mainly is by division board body portion to be divided into two cavitys up and down, and being used to bottom lower house installs two flange holes of squib stationary pipes and passes through in inner rational deployment the rational fixed limit of each assembly to be realized These characteristics.
The utility model is when crashing, when the acceleration/accel that produces meets or exceeds the preset limit value of controller, the occupant's that combined sensor is gathered the bodily form and weight information, by the central process unit analytical calculation, select different ignition schemes according to different situations, be respectively that single-stage igniting, twin-stage are lighted a fire simultaneously, the twin-stage delayed firing.
The utility model can be according to the auto against situation, produce the gases of different amounts selectively in different time sections, and duration of run can be according to different syntagmatic changes between two pilot burners, thereby obtain adjustable a series of generation of gas amount.
The utility model advantage compared with prior art is: the gas that main and auxiliary combustor produces makes up as required, can produce the air-flow of different pressures performance, satisfies the airbag expansion and launches the safety precaution of back to the occupant.Have casing rigidity to inner chamber do not have harshly require, manufacturing process is simple, low cost of manufacture, the intensity, the assurance producer that have effectively strengthened generator body can bear advantages such as higher interior pressure, that this producer initial pressure is set up is fast, force down in the combustion chamber, delivery pressure is stable, filtration is good, dust is few, and volume is little.
The specific embodiment
Fig. 2, Fig. 3, among Fig. 4,1 lower house, 2 upper shells, 3 tinsels, filtering net on 4,5 combustion chamber lids, 6 cushion rubbers, 7 automatic igniting tablets, 8 gas generating agents, 9 igniting end caps, 10 main permanent seats, 11 air gates, 12 division boards, 13 times filtering nets, 14 igniters, 15 main squibs, 16 packing seal I, 17 short circuit socket I, 18 secondary squibs, 19 secondary ignition chamber covers, 20 packing seal II, 21 short circuit socket II, 22 secondary permanent seats, 23 annular igniting tablets, 24 gas generating agents, 25V type bevel for welding, 26 aux. chamber of Diesel engines, 27 major air cells, 28 main filter chambers, 29 secondary filter chambers, the secondary hole of 30 division boards, 31 division board main apertures, 32 auxiliary point fire holes, 33 draw-in grooves, 34 secondary ignition chamber cover grooves, 35 flange hole II, 36 flange hole I, 37 main ignition hole, 38 circle pits, 39 flanges, primary ignition chambers 40,41 secondary ignitions chamber.
As Fig. 2, shown in Figure 3, the utility model is made of a upper shell 2 and a lower house 1 that is fitted in up and down together, the similar inverted cup-shaped of upper shell 2, its top is a facet, one pit is arranged in the middle of the plane, upper shell 2 upper walls and tablet 7 closed contacts of lighting a fire automatically are convenient to the igniting tablet is corresponding automatically in this pit bottom; The side face of upper shell 2 is an annular arrangement, and the air gate 11 of some is evenly distributed on the side face of upper shell 2 by merry-go-round arrangement.Layer of metal paillon foil 3 is being pasted in air gate 11 inboards on upper shell 2 side faces, and this tinsel 3 is endless belt-shaped, 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 1 is a planar circumferential shape, and bottom surface center of symmetry axle has two flange holes: to certain distance, secondary permanent seat 22 bottom stage are inserted in and are interference fit in the flange hole II 35 to in-flanges for flange hole II35, flange hole I 36, two flange holes; Main permanent seat 10 bottom stage are inserted in flange hole I 36, are interference fit; Lower house base plane upward axis forms a square flange 39 radially bending flange again after being bent to form side face, its effect is to be convenient to and the fixing assembling of air bag assembly; The external diameter of the side periphery of lower house 1 and the internal diameter of upper shell 2 are about equally, one ring-band shape coincidence side face is formed at the bottom that lower house 1 top is pressed into upper shell 2, and arc surface that lower house 1 radially bends and upper shell 2 constitute the V-type bevel for welding 25 that is suitable for welding to the downside periphery.
Be provided with major air cell 27, main filter chamber 28 from the center shaft wire loop in the main body, the center of symmetry axis has two eccentric positions to be provided with primary ignition chamber 40, secondary ignition chamber 41.Main permanent seat 10, main squib 15, igniter 14, igniting end cap 9 are arranged in the primary ignition chamber 40, packing seal I 16 is arranged at main squib 15 bottoms, by main permanent seat 10 middle part flange main squib 15 is fixed, and guaranteed that packing seal I 16 deformation in compressions guarantee sealing property; The igniting end cap 9 at 40 tops, primary ignition chamber is sealed in igniter 14 in the main permanent seat 10, and by the main permanent seat 10 upper end periphery flange end cap 9 spacing chuckings of will lighting a fire.Igniter 14 is tablet or graininess, if the firing tip lid pastes and pastes tinsel and seal during graininess.Secondary ignition chamber 41 is made up of secondary permanent seat 22, secondary ignition chamber cover 19, annular igniting tablet 23, secondary squib 18, packing seal II 20; Secondary ignition chamber cover 19 snaps in the draw-in groove 33 of secondary permanent seat side face by secondary ignition chamber cover groove 34, plays the effect of fixed limit; The interior circular diameter of annular of annular igniting tablet 23 is greater than secondary squib 18 end diameter, and cover carries out fixed limit to it up; The fixed form of secondary squib 18 and packing seal II 20 is with primary ignition chamber 40.
Well-distributed main ignition hole 37 is arranged as outlet passageway on the igniting end cap 9, be communicated with primary ignition chamber 40 and major air cell 27, flame is ejected into major air cell 27 by main ignition hole 37 after the indoor igniting of primary ignition; Secondary ignition chamber cover 19 side faces have an auxiliary point fire hole 32, and secondary ignition chamber 41 igniting back flames are ejected in the aux. chamber of Diesel engine 26 by this hole.
Two eccentric flange holes, 35,36 sockets of main permanent seat 10, secondary permanent seat 22 bottom peripheries and lower house 1 bottom surface, be interference fit, the circular arc that permanent seat bottom periphery and hole flanging form has constituted a V-type bevel for welding, with laser welding main permanent seat 10, secondary permanent seat 22 and lower house 1 are combined as a whole then, played sealing function simultaneously combustion chamber.
Major air cell 27 and aux. chamber of Diesel engine 26 are separated into up and down two independently combustion chamber units by division board 12.Major air cell 27 by the upper end of the inwall of last filtering net 4, major- minor ignition chamber 40,41 face the wall and meditate, cushion rubber 6 lower surfaces, combustion chamber lid 5 lower surfaces and division board 12 upper surfaces constitute, encircle be centered around central axis around, the lower end inner round wall of going up simultaneously filtering net 4 is enclosed within the outside, two flange holes of division board 12, and gas generating agent 8 is housed in the major air cell 27.It is flat circumferential that combustion chamber lid 5 is positioned at major air cell 27 top end faces, there is a circle pit 38 centre, can place automatic igniting tablet 7 in the circle pit 38, in the middle of the circle pit bottom injection hole is arranged, face gas generating agent 8, the side face external diameter equates substantially that with last filtering net 4 inner peripheral surface internal diameters combustion chamber lid 5 can be nested in the filtering net 4, and cushion rubber 6 is placed in the combustion chamber lid.Aux. chamber of Diesel engine 26 is made of following filtering net 13 inwalls, main permanent seat 10 outer walls, secondary ignition chamber cover 19 outer walls, lower house 1 bottom, is centered around around the center shaft; Following filtering net 13 inwalls just in time are enclosed within the outside in two flange holes of lower house 1, are fixed.Described outer wall upper end of going up filtering net 4 is with a protecting sleeve, uniform combustion chamber air gate on the protecting sleeve, and the gas generating agent performance requriements that the aperture can basis is regulated;
Described main filter chamber 28 is made of the outer wall of last filtering net 4 and the interior annulus of upper shell, and described secondary filter chamber 29 is by the outer wall and the division board 12 of filtering net 13 constitute down.
The diameter of two flange holes of division board 12 (division board main aperture 31, the secondary hole 30 of division board) diameter and main permanent seat 10 upper end side faces, secondary permanent seat 22 upper end side faces is basic identical, for intermittently cooperating; Two flange holes just just in time are being enclosed within, on the secondary permanent seat, just, side face has step that axial limiting is carried out in two flange holes respectively on the secondary permanent seat, can guarantee filtering net when assembling, can not push under filtering net, and cause down filtering net to be out of shape.
On the division board 12 circular cone side faces some grooves are arranged, be convenient to make the distortion of division board circular conical surface place after pressing in aux. chamber of Diesel engine 26 ignition combustions produce, make division board 12 bottoms and lower house 1 upper bottom portion be separated from the formation outlet passageway, the gas in the aux. chamber of Diesel engine 26 is upwards discharged from air gate along above-mentioned outlet passageway by behind the secondary filter chamber.
Shown in Figure 3, lighting a fire simultaneously with twin-stage is example.After the ignition signal that the utility model Be Controlled system sends starts, referring to the airflow arrows direction of Fig. 3.After igniter 14, annular igniting tablet 23 were lighted, high temperature gas flow by main ignition hole 37, auxiliary point fire hole 32, entered into major air cell 27, aux. chamber of Diesel engine 26 respectively respectively.The high temperature gas flow gas generating agent 8,24 in the main and auxiliary combustor that ignites, gas generating agent 8 burnings produce a large amount of gases, in osed top major air cell 27, form high pressure, at the pressure of major air cell 27 between 5MPa~20MPa, filtering net 4 on this high pressure downstream is passed through, break through the tinsel 3 on upper shell 2 inner peripheral surfaces again, enter into then in the airbag of air bag system; Gas generating agent 24 is also produced a large amount of gases by ignition combustion in addition, in osed top aux. chamber of Diesel engine 26, form high pressure, make division board 12 deformation in compressions, the bottom breaks away from the formation outlet passageway with lower house, air-flow is discharged from air gate along this passage, the gas that main and auxiliary combustor produces makes up as required, can produce the air-flow of different pressures performance, satisfies the airbag expansion and launches the safety precaution of back to the occupant.
As shown in Figure 4, when presence of fire or producer need be destroyed, when ambient temperature reaches nearly approximately 180 when spending, automatically igniting tablet 7 will be lighted, airflow arrows direction referring to Fig. 4, automatically the high temperature gas flow of igniting tablet 7 generations is ejected on the gas generating agent 8 by the combustion chamber lid injection hole, gas generating agent 8 is lighted the back and is produced a large amount of gases, in osed top major air cell 27, form high pressure, at the pressure of major air cell 27 between 40MPa~50MPa, filtering net 4 on this high pressure downstream is passed through, break through the tinsel 3 on upper shell 2 inner peripheral surfaces again, gas ejects outside the producer, gas generating agent 24 and the interior automatic igniting tablet 7 of major-minor ignition chamber in the aux. chamber of Diesel engine have also been lighted simultaneously, annular igniting tablet 23 and major- minor squib 15,18, the high strength of the utility model middle shell and automatic igniter have guaranteed the safety destruction of producer.
Producer is used the current point fire in insulation under 23 ℃ of temperature after 4 hours in the 60L leakproof tank, its data as shown in Figure 5.
Hysteresis 10ms, container inner pressure are P
2max=0.170MPa reaches P
2max95% time t
95%max=50ms, container pressure time of origin 1.1ms.