RU2000460C1 - Solid-reactant gas generator - Google Patents

Abstract

1 / The invention relates to the construction of powder pressure accumulators (PAD), intended for use in hydroprocessing devices. The objective of the invention is to increase the operating time of the PAD by providing the necessary law of pressure change in the combustion chamber. When the igniter is activated, the working fluid is displaced by the products of combustion through the throttle aperture. Perforated diaphragms hold the charge checkers, which allows the checkers to be ignited at certain intervals during the displacement of the working fluid to increase the operating time. 2 ill.

Description

The invention relates to the construction of powder pressure accumulators (PAD), as well as a gas generator (GG) and solid fuel rocket engines (solid propellant rocket engines), and is intended primarily for use in hydraulic processing devices. It can also be used in multi-turn-on solid propellant solid propellant rocket propulsion systems for forced quenching of solid fuel charges (PT) and in various systems for liquid displacement.

PADs are known whose functional value boils down to displacing a liquid, mainly a refrigerant, to quench TT charges. The design of such PADs comprises a combustion chamber, a TT displacement charge, an igniter, and a working fluid (water or antifreeze). A piston may be inserted into the combustion chamber to expel the fluid.

Similar designs are used in the propellant liquid fuel delivery system of U.S. Patent No. iSb 3116599, class. F 02 K, 1984. In general, the proposed technical solutions provide the functional purpose of specific systems. However, their use for another purpose, namely, for processing materials with a liquid flowing out of a hydraulic installation or directly from a PAD, is not possible. This is due to the short time required to maintain the required pressure level in the combustion chamber due to the degressive nature of the pressure-time dependence p f (r). The requirements to ensure a constant or progressive change in the pressure in the combustion chamber are based on existing experience in the hydroprocessing of materials.

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The closest technical solution for the set of essential features, selected as a prototype, is the design of the PAD for supplying liquid to the combustion products of a rocket engine. Said device comprises a combustion chamber divided by a piston into two sections, in the first of which a TT charge and an igniter are placed, in the second a working fluid (aqueous ammonia solution). The camera from the side of the second section is made with a throttle hole closed by a membrane. The disadvantage of the above construction, as well as of the analogues presented above, is the short operating time of the PAD due to the degressive dependence of p f (t) with an increase in the volume of the combustion chamber when the piston moves, which excludes the possibility of its use for hydroprocessing of materials.

The aim of the invention is to increase the operating time of the PAD by providing the necessary law of pressure change in the combustion chamber.

The goal is achieved in that in a PAD containing a combustion chamber with a throttle aperture closed by a membrane and a TT charge, a working fluid and an igniter placed in it, perforated diaphragms dividing it into sections are installed in the combustion chamber, and the TT charge is made in the form Checkers placed in the section of the combustion chamber.

A comparative analysis of the proposed design with the prototype shows significant of the differences: the use of multisectionality and sequence of arrangement of charges TT.

Figure 1 shows the design of the proposed PAD; figure 2 - test results of the known and proposed PAD.

The proposed PAD includes a chamber 1 with a throttle hole 2 and a membrane 3, divided into sections by perforated diaphragms 4. in which the solid fuel checkers 5 are placed. Ignition of the charge is carried out only in the first section. The chamber is partially or completely filled with the working fluid 6. Depending on the particular operation, the PAD for the hydroprocessing of the material selects a certain number of sections, their volume, and the mass-geometric parameters of the CT checkers. R As the working fluid, water, industrial alcohol, i.e. oils, etc. can be used.

The PAD works as follows ofjp.-mom

When the igniter 7 is activated, the working fluid is displaced by the combustion products through the throttle opening of the chamber

combustion and a corresponding pressure drop in the PAD. When a liquid is displaced to a charge level in the first section, it is ignited and the pressure level is equalized, for example, to its initial value. Further displacement of water under the pressure of the products of combustion of the igniter and the charge of the first section provides a predetermined connection of the second and subsequent charges of the CT.

5 as a result of the dependence p f (t) in the combustion chamber, it has a sawtooth character, the amplitude and period of which depends on the volume of the section, their number and the charges used. In practice, it is possible to provide a certain number of pressure sections close to the constant pressure in the combustion chamber during the entire operation time of the PAD, as well as any other dependence.

5 in order to determine the effectiveness of the proposed design of PAD, comparative bench tests of the known (1) and proposed (2) PAD (Fig. 2) were carried out, the results of which confirm the operability of the new design.

The set of essential features characterizing the proposed design of PAD is currently unknown. Such a performance of PAD allows you to get a positive effect that existing designs do not possess, and not only in the field of hydraulic cutting of materials, but also in the quenching of solid propellant solid propellants, the displacement of liquid fuel and

0 others. The proposed design is able to provide the necessary law of fluid flow from PAD.

The proposed technical solution has been adopted for experimental development and is at the stage of preliminary design. After completion of testing, the proposed design of PAD will find wide application in the national economy.

Claims (1)

The claims A powder pressure accumulator containing a combustion chamber with a throttle aperture closed by a membrane and a solid fuel charge placed in it, a working fluid and an ignitor, a la and with the fact that in it in the combustion chamber perforated dgflregms dividing it into sections are installed. and the charge of solid fuel is oypno / nen R NIDR rlchmtsngchikh in sections comet sshoachi mymnch Figure 1 P.lffia VI / , ACh .x