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A two-stage gas generator

A technology of gas generators and gas generators, applied in chemical instruments and methods, separation methods, pedestrian/passenger safety arrangements, etc., can solve the problems of increasing the weight of gas generators and high filter heights, and achieve increased channels and spaces, The effect of low mechanical properties and a small number of parts

Active Publication Date: 2021-04-02
HUBEI HANGPENG CHEM POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the filter is axially fixed by the end faces respectively abutting against the bottom surface of the upper casing and the filter gasket, but the height of the filter in this structural design is relatively high, which indirectly increases the weight of the gas generator

Method used

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  • A two-stage gas generator
  • A two-stage gas generator
  • A two-stage gas generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] exist image 3 In the gas generator, the upper casing 10 and the lower casing 20 form an accommodating cavity 00 after the overlapping connecting sections are welded.

[0047] The upper casing 10 has several vent holes 10b on the peripheral wall 10a, and the vent holes 10b are pasted and sealed from the inner peripheral wall 10c with a sealing foil 70 such as aluminum, copper, or stainless steel.

[0048] The first combustion chamber 30 and the second combustion chamber 40 are arranged in the accommodating cavity 00, wherein the first combustion chamber 30 includes a filter system 310 with channels, a first ignition system 320 and filling in the first ignition system 320, the second combustion chamber The first gas generating agent 330 in the cavity between the second combustion chamber 40 and the upper casing 10 and the filter system 310; the second combustion chamber 40 includes a second ignition system 420, and the second ignition system 420 filled inside Two gas ge...

Embodiment 2

[0056] Further, another "two-stage" gas generator of the present invention can refer to the attached Figure 6-8 to explain. This scheme is a further optimization on the structure of Embodiment 1, such as Figure 6 The gas generator shown.

[0057] The same as Embodiment 1 is: the upper casing 10 and the lower casing 20 form an accommodating chamber 00 after welding of overlapping joint sections; several exhaust holes 10b are provided on the peripheral wall 10a of the upper casing 10, and the exhaust holes 10b Use aluminum, copper, stainless steel and other sealing foil 70 to paste and seal from the inner peripheral wall 10c; the accommodation chamber 00 includes a first combustion chamber 30 and a second combustion chamber 40, wherein the first combustion chamber 30 includes a filter system 310 with channels, The first ignition system 320 and the first gas generating agent 330 filled inside; the second combustion chamber 40 includes the second ignition system 420 and the se...

Embodiment 3

[0065] On the basis of the above-mentioned embodiments 1 and 2, the second combustion chamber can use the implementation form in the prior art, or can use the Figures 9 to 11 The optimization scheme given in .

[0066] Such as Figure 9 As shown, the second combustion chamber 40 includes a second ignition system 420 and a second gas generant 430 filled inside the second ignition system 420 . The second ignition system 420 includes an igniter 80 , an ignition housing 90 and a burst panel 100 . Wherein, the igniter 80 is located at one end 90a of the ignition housing 90, the blasting panel 100 is located at the other end 90b of the ignition housing 90, and the blasting panel 100 is fixed to the end 90b of the ignition housing 90 by laser welding, resistance welding or other welding methods.

[0067] Such as Figure 10 As shown, the blasting panel 100 is dish-shaped, and the middle part 100a of the dish-shaped protrudes in the shape of a circular arch, and the edge of the cir...

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Abstract

Provided is a double-stage gas generator. The double-stage gas generator comprises a first combustion chamber and a second combustion chamber which are not communicated with each other; the first combustion chamber and the second combustion chamber are formed in a containing cavity formed by an upper shell and a lower shell; an exhaust hole is formed in the upper shell, the second combustion chamber comprises a second firing system and a second gas generating agent which fills the interior of the second firing system, and the first combustion chamber comprises a filtering system, a first firing system and a first gas generating agent; the filtering system comprises a filter screen and a supporting device, and the two ends of the filter screen abut against the position between the upper shell and the supporting device on the lower shell; the first firing system and the second firing system are mounted on the lower shell and placed in a cavity formed between the filtering system and thelower shell; the cavity formed by the first firing system, the second combustion chamber, the upper shell and the filtering system is filled with the first gas generating agent.

Description

technical field [0001] The present invention relates to gas generators for restraint devices such as vehicles, in particular to gas generators with one or more combustion chambers, and more particularly to "dual-stage" gas generators with 2-stage combustion chambers. Background technique [0002] A restraint device for a vehicle or the like generally uses a gas generator to generate gas for restricting inflation of an airbag in the event of a collision. Due to the complex situation of vehicle collision, the "two-stage" gas generator with two-stage combustion chamber can selectively change the output performance parameters according to the collision intensity, speed, etc., which is more advantageous. But at the same time, due to the use and performance requirements, this gas generator has a more complex structure and a larger weight, which increases the complexity of the design, additional parts and associated manufacturing costs. [0003] In CN106660510A, a gas generator st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R21/264B01D46/00
Inventor 罗运强刘柳任响宁付文斌杨志雄张印民张俊杜涛沈晓琛翟连峰
Owner HUBEI HANGPENG CHEM POWER TECH