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Low critical pressure double base propellant

A double-base propellant, low-criticality technology, applied in the direction of offensive equipment, compressed gas generation, etc., can solve the problem of restricting the use of rockets and achieve stable and reliable work

Active Publication Date: 2013-10-02
宜宾北方川安化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The larger-scale WR-98 rocket in the meteorological rocket market adopts the double-lead-2 formula. Due to the low equilibrium pressure of the design, the average working pressure of the engine is already lower than 4MPa at -20°C, so the rocket of this type The operating temperature range is between (-20 ~ 50) °C, which greatly limits the use of this type of rocket, and during use, low temperature delayed ignition is the highest probability of all failures

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The composition of the formula designed according to the present invention is as follows: nitrocellulose 55%; nitroglycerin 24%; ethyl neutralizer 1%; dinitrotoluene 14%; petrolatum 1.5%; inorganic lead salt 2%; metal nickel powder 1.0% ; Magnesium oxide 1.5%. Used for JFJ type rain-enhancing and anti-hail rocket charge. In the static engine low temperature (-40℃) test, the average engine pressure is about 3MPa. During the test, all engines ignite and work normally. The test curve shows that the engine is working in a stable state, and there is no low-temperature burnout or flameout. However, the WR-98 rocket was subjected to comparative tests at the same temperature, and without exception, the ignition failure occurred. When the temperature was increased to -20℃ for the test, there were still some ignition delays in the test. It shows that the propellant charge with the formula of the invention has a wider temperature range and stronger climate adaptability.

Embodiment 2

[0036] The composition of the formula designed according to the present invention is as follows: nitrocellulose 55%; nitroglycerin 24%; ethyl neutralizer 1%; dinitrotoluene 14%; petrolatum 1.5%; inorganic lead salt 2%; metal nickel powder 1.0% ; Magnesium oxide 1.0%; Alumina 0.5%, the propellant charge designed according to this formula is used for the BL-2 rain-enhancing and anti-hail rocket charge. The engine using this charge is a glass fiber reinforced plastic shell with a maximum designed pressure resistance of 10MPa. After a static engine test under low temperature (-40℃) conditions, the average working pressure is (3~4) MPa, and the maximum high temperature pressure is less than 8MPa. The charge of the system is about 0.5kg. The WR-1D rocket with similar range and working efficiency adopts SQ-2 formula propellant. Due to the high critical pressure at low temperature, the working pressure of the engine at low temperature (-40℃) is greater than 6MPa, and the maximum workin...

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PUM

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Abstract

The invention discloses a low critical pressure double base propellant, which belongs to the field of propellants. The low critical pressure double base propellant comprises the following components by weight percent: 40%-60% of nitrocotton, 15%-30% of nitroglycerin, 1%-3% of stabilizing agent, 5%-20% of cosolvent, 0.5%-3% of vaseline or zinc stearate, 1%-4% of organic or inorganic lead salt or copper salt, 0.5%-1.5% of metallic nickel powder, and 0.5%-2.5% of metallic oxide. The double base propellant has critical pressure less than 3MPa at low temperature (minus 40 DEG C).

Description

Technical field [0001] The invention is a pushing agent field, which is used in the installed medicines for gas generators and solid rocket engines, especially for meteorological rockets suitable for meteorological rockets with lower strength of the shell. Background technique [0002] The existing dual -base solid propeller, whether it is a dual -based propeller or a modified dual -based propeller, has a high critical pressure, generally greater than 4MPa.Due to the high critical pressure, in order to ensure the stability of the engine's working state when the engine design is performed, the design value of the balanced pressure is relatively high.Taking the use of a wide range of double-lead-2 formula propellars in the military and civilian field as an example, when the engine design is performed, the low temperature balance pressure is generally greater than 6MPa. Because the design pressure is relatively high, the strength requirements of the engine case are required.Improve....

Claims

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Application Information

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IPC IPC(8): C06D5/10
Inventor 田新李伟杨斌吴涛胡相红陈太俊任斌佘佐勇游翔李鹏
Owner 宜宾北方川安化工有限公司
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