RU2384555C2 - Manufacturing method of charge from ballistic solid propellant - Google Patents

Abstract

FIELD: explosives.

SUBSTANCE: manufacturing method of charge from ballistic solid propellant (BSP) involves mixing of fuel components containing solid additions in water medium, pressing of fuel mass, rolling, pelletisation of fuel mass, drying of fuel pellet and pressing of charge with a through method. Solid additions are dosed for fuel components to be mixed in the form of pre-prepared water suspension; at that, water suspension of solid additions is prepared at temperature of 15…35°C, and the ratio of solid additions: water within 1:3…1:5 and introduction of sulphoricinate E in quantity of 0.10…0.25 wt % in relation to fuel mass.

EFFECT: increasing homogeneity of fuel mass and reproducibility of ballistic characteristics of pressed charges.

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Description

The invention relates to the field of rocket technology and can be used in the development and manufacture of charges from ballistic solid rocket fuel (BTRT) to rocket engines of solid fuel (RTTT) and other devices.

Known methods for the manufacture of charges from BTRT according to sources: Smirnov L.A. "Equipment for the production of powders by auger technology and charges from them." M., MGAHM, 1977, pp. 51-52,173-175, and also according to the patents RU 2105747, RU 2254311, US 3037891, DE 3033519, US 4080411.

It is also known that in order to achieve high output characteristics (based on specific impulse, level of burning rate, flamelessness, smokelessness and other characteristics), BTRTs are purposefully introduced additional solid substances - powerful explosives (for example, octogen), inhibitors or combustion catalysts and other solid additives .

These additives are introduced into the composition of the BTRT, as a rule, in the form of aqueous suspensions, which allows for their uniform distribution in the mass of fuel. However, during BTRT processing, there are cases when the introduced additive is difficult to wet with water and agglomerates (lumps), which worsens the distribution of the additive in the fuel mass, for example, when processing slow-burning ballistic TPT using a solid additive - γ-polyoxymethylene (POM) combustion inhibitor, with the content of the latter in the formulation of BTRT in the amount of 10 ... 20% (wt.) according to patent RU 2172730 (analogue).

The disadvantage of this analogue is the agglomeration of a solid additive in an aqueous medium, leading to a deterioration in the distribution of the additive in the composition of the BTRT, which significantly reduces fuel homogeneity, and the latter negatively affects the reproducibility of the ballistic characteristics of the fuel as a whole, and ultimately reduces the warranty period for storing charges.

The closest technical solution to the patented is a method of manufacturing a charge of ballistic solid rocket fuel according to patent RU 2254311 C1, 06/20/2005, IPC C06B 21/00 (2006.01), 25/24 (2006.01), selected by the authors for the prototype. According to this method, solid additives are fed into the mixture of fuel components in the form of an emulsion containing industrial oil and a portion of a portion of sulforicinate "E", another part of sulforicinate "E" is added when preparing the emulsion of a mixture of plasticizers. The prototype method, like analogues, is also characterized by low manufacturability, accompanied by an increased dispersion of fuel characteristics.

An object of the invention is to develop a method for manufacturing charges from BTRT, providing improved manufacturability, uniformity and quality (primarily, the level of burning rate) of pressed charges with reproducible ballistic characteristics.

The technical result of the invention is to develop a method of manufacturing solid rocket fuel of a ballistic type, including mixing fuel components in a neutral environment with the introduction of a surface-active substance (surfactant) in the mixing phase, squeezing the fuel mass, rolling-pelletizing of the fuel and pressing charges by the passage method, while as a surfactant use sulforicinate "E". Used sulforicinate "E" is used in the preparation of an aqueous suspension of solid additives provided for in the formulation of BTRT, followed by the introduction of the specified suspension in BTRT in the mixing phase.

For this, an additional technological phase of preparing a suspension of solid additives is introduced into the technological scheme for manufacturing the fuel mass. A suspension of solid additives prepared in an aqueous medium is uniformly dosed into the bulk of the fuel by mixing the components. In this case, the suspension is prepared at a temperature of 15 ... 35 ° C and with the module "solid additives - water" in the range 1: 3 ... 1: 5.

The invention is illustrated in the drawing, which shows the technological scheme of fuel processing and manufacture of charges according to the patented method.

The invention consists in providing (enhancing) the effect of phobization (wettability) of solid fuel components with their subsequent uniform distribution in the composition of the BTRT. This effect is achieved by introducing surfactant sulforicinate "E" into the composition of the BTRT at the phase of preparing the suspension of solid additives to their subsequent introduction at the phase of mixing the fuel components in the aqueous medium.

The introduced amount of E sulforicinate is not less than 0.10% (by weight of the fuel produced), which guarantees the absence of “clumping” during the mixing phase of the BTRT components in the aquatic environment, and not more than 0.25% (by weight of the fuel made), which allows us to ensure satisfactory homogeneity of the BTRT formulation as a whole and satisfactory reproducibility of the ballistic characteristics of the fuel.

Examples of practical implementation of the method.

Example 1. A batch of BTRT charges was produced weighing 4.6 tons in accordance with the technological scheme (see drawing). In the aqueous suspension of solid additives was introduced sulforicinate "E" (TU 2481-004-05744685-1) in an amount of 0.10% relative to the manufactured mass of BTRT. A suspension of solid additives was introduced into the BTRT during the mixing phase of the fuel components. The spread in the rate of fuel combustion within the batch was ± 1.8%.

The high quality of the BTRT charges technological process was ensured (according to the results of the fire test bench charges).

Example 2. A batch of BTRT charges was produced with a mass of 3.8 tons. Sulforicinate “E” was introduced into the aqueous suspension of solid additives in an amount of 0.25% with respect to the manufactured BTRT mass. The spread in the rate of fuel combustion within the batch was ± 2.1%. The high quality of the technological process for preparing charges and a satisfactory level of output intra-ballistic characteristics of the charge are ensured.

The positive effect of the invention is to increase the uniformity of the fuel mass and reproducibility of the ballistic characteristics of the pressed charges.

Claims (1)

A method of manufacturing a charge from ballistic solid rocket fuel, comprising mixing fuel components, including solid additives, in an aqueous medium, squeezing the fuel mass, rolling, tabletting the fuel mass, drying the fuel tablet and compressing the charge in a continuous manner, characterized in that the solid additives are dosed for mixing fuel components in the form of a pre-prepared aqueous suspension, and the aqueous suspension of solid additives is prepared at a temperature of 15 ... 35 ° C, the ratio of solid additives: water within 1: 3 ... 1: 5 and with the introduction of sulforicinate E in an amount of 0.10 ... 0.25 wt.% In relation to the fuel mass.

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