Hybrid inflator
An inflator and gas technology, which is applied in the production of compressed gas, explosives, thin material processing, etc., can solve the problems of complex assembly process and increase the total cost of the inflator.
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Embodiment 1
[0079] The HPC-96 propellant described above was used to form propellant particles 90 having a total weight of 18 grams. Each propellant particle 90 has a shape generally as shown in FIG. 2, and has a length or thickness of about 0.52 inches, an outer diameter of about 0.29 inches, and a wall thickness of about 0.105 inches (half the difference between the inner and outer diameters of the propellant particles 90). . In addition, this HPC-96 propellant has the following properties when ignited in the presence of air: Impulse of 363493 ft-lbs / lb (ft-pounds per pound); heat of detonation of 1062 cal / g; Tv; gas molar weight of 26.7 g / mol; specific heat of 1.2196; and solid state density of 1.65 g / cc. Theoretical calculations of normal composition and assuming combustion during expansion from launch pressure to atmospheric pressure give the gas composition in mole percents: approximately 26.5% carbon monoxide; 19.1% water; 26.2% carbon dioxide; 13.7% nitrogen; 14.2% hydrogen; and...
Embodiment 2
[0084] The procedure of Example 1 was repeated, when 10.4 grams of HPC-96 propellant was used as particle 90 and about 164.4 grams of compression medium 36 was used, the composition of which was calculated in molar percentages to be about 15% oxygen and about 85% argon . When using these propellant particles 90 to actuate the inflator 30, its performance curve is as follows image 3 and 4 As shown, and the inflator 30 is constructed in the manner described in Embodiment 1. In addition, the gas output from the inflator 30 includes, in molar percentages, about 2.4% carbon dioxide, about 1000 ppm carbon monoxide, about 70 ppm NO x , about 38ppm of NO 2 and about 0 ppm hydrogen. Therefore, as the amount of oxygen increased from 5% to 15% in Example 1, the amount of carbon monoxide decreased greatly, while NO and NO 2 not significantly increased. Furthermore, this also allows the use of very little propellant.
Embodiment 3
[0086] Simultaneously using a combination of 10.4 grams of HPC-96 and 169.0 grams of compressed medium 36, wherein the combination of compressed medium 36 includes about 15% oxygen and about 85% argon by mole percentage, the process of Example 1 was repeated twice. The performance curve for the inflator 30 is similar to Figure 3-4 The inflator 30 is shown in and constructed in the manner described in Embodiment 1. Additionally, the gas output from the inflator 30 includes approximately 1000 ppm and 800 ppm carbon monoxide, respectively approximately 1.0% and 1.2% carbon dioxide, approximately 60 ppm and 50 ppm NO x , and approximately 23ppm and 20ppm NO 2 . Therefore, increasing the amount of oxygen up to 15% and reducing the amount of HPC-96 reduces the amount of carbon monoxide without appreciably affecting NO and NO 2 . Furthermore, the increased amount of oxygen allows the use of less propellant.
[0087] As noted above, two "conventional" bullet-type propellants wer...
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Abstract
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