RU2255240C1 - Solid propellant charge - Google Patents

Abstract

FIELD: rocketry.

SUBSTANCE: proposed solid propellant charge contains cover filled with gluing agent in which pins with channel powder grains are installed. Pins are glued into channel powder grain, being made with ring lock for glue on cylindrical head with diameter equal to diameter of grain channel, and springy leg with support rigidly installed in cover with air gap between channel powder grains and gluing agent.

EFFECT: improved reliability and efficiency of solid propellant charge at any temperature range.

2 dwg

Description

The invention relates to rocket engines of solid fuel, in particular to tubular powder charges of the “brush” type (with the powder elements secured to the front bottom of the engine chamber according to the “brush” principle), mainly multi-cup, with a short burning time.

Known mount the checkers of the charge of solid fuel in the combustion chamber of a rocket engine, in which a layer of liquid elastomer is applied to the bottom of the chamber [1]. The charge checkers are installed in the elastomer, after which the elastomer is polymerized. The specified technical solution provides reliable fastening of the powder bombs in the engine chamber. The disadvantages of this design include the presence of powder residues in the seal after the engine is finished, which will lead to a decrease in momentum, as well as the inability to control the gluing, which, if the adhesion is poor, will cause the eyes to be torn off and carried away unburned, which is unacceptable.

These disadvantages are largely eliminated in the design of the charge of solid rocket fuel [2], made without immersion of the powder bombs in the adhesive material. The charge contains a lid with a shoulder filled with elastic adhesive material, in which pins are installed with channel blocks fixed to them. The pins are made cylindrical with an annular groove under the adhesive material, and radial holes are made on the checkers opposite the pin.

However, this design of the powder charge of solid rocket fuel, for all its advantages, namely: reducing the mass of non-combustible powder residues, has a significant drawback - with poor adhesion, an increase in the depth of insertion of pins into the adhesive material will be required, which will lead to rigidity of the charge structure, and during operation powder charge at minus critical temperature (-50 ° C) can lead to the destruction of powder charge checkers, which is unacceptable.

The objective of the invention is to eliminate the above disadvantages: improving the reliability and efficiency of the charge of solid rocket fuel in any temperature range, without limitation.

This task is achieved by the fact that in the charge of solid rocket fuel containing a cover filled with an adhesive composition, in which pins with channel powder checkers are installed, each pin is glued into the channel powder checker, while it is made with an annular lock under the adhesive on a cylindrical head, with a diameter equal to the diameter of the channel of the checker, and a spring leg with a support rigidly mounted in the lid with an air gap between the channel powder checkers and the adhesive composition.

The essence of the invention lies in the fact that this design of the charge of solid rocket fuel provides reliable fastening of the channel powder guns and their complete combustion without destruction due to the use of the original design of the pins with a spring leg with a T-shaped support, rigidly installed in the lid with an air gap between the channel with powder checkers and adhesive and allowing to absorb shock from the igniter and vibration combustion due to the spring leg. The use of a spring leg allows you to widely control the rigidity of the charge structure, varying the thickness of the spring leg and the size of the air gap between the checkers and the adhesive.

Figure 1, 2 shows the proposed design of the charge of solid rocket fuel, where:

1 - cover;

2 - adhesive composition;

3 - channel powder checker;

4 - pin;

5 - ring lock on a cylindrical pin head;

6 - spring leg pin;

7 - T-shaped support spring legs;

8 - air gap.

The assembly and operation of the solid rocket fuel charge is as follows: all the parts included in the assembly are prefabricated. First, the assembly of powder canal checkers. A pin 4 with a cylindrical head having an annular lock 5 under the adhesive, which is equidistant to the channel of the checker, is glued into each channel powder block 3. After polymerization of the adhesive composition, the required calculated number of powder channel blocks with glued pins is installed with a T-shaped support 7 of the spring leg 6 in the adhesive composition 2, poured into the cover 1, with the formation of an air gap h between the channel powder blocks 3 and adhesive composition 2. After polymerization of the adhesive Composition 2 charge is ready for use. As an adhesive composition for rigidly sealing checkers into the lid, it is desirable to use compounds that after glass polymerization and which have better adhesion than the elastomers used in the prototype [2]. An annular lock on the cylindrical head of the pin is designed to hold glue and prevent tearing off glued channel blocks during charge operation. The spring leg of the pin is designed to absorb shock during the ignition of powder bombs and their vibrational combustion.

The solid rocket fuel charge works as follows: when channel drafts are ignited from the igniter, a flame blows on the channel drafts installed on the pins with a spring leg, the pin legs are bent, absorbing the impact, while the powder channel drafts do not break and completely burn out. Experimental verification of the proposed design of the charge confirmed its performance and high efficiency in any temperature range without restrictions.

Sources of information

1. Application of France No. 2436121, July 4, 73, MKI C 06 D 5/06 - analogue.

2. Russian Patent No. 2186235 of July 27, 2002, Bull. No. 21, IPC7 F 02 K 9/32 - prototype.

Claims (1)

A solid rocket fuel charge containing a cover filled with an adhesive, in which pins with channel powder checkers are installed, characterized in that each pin is glued into the channel powder checker, with a ring lock for adhesive on a cylindrical head with a diameter equal to the diameter of the channel checkers, and a spring leg with a support rigidly installed in the lid with an air gap between the channel powder checkers and the adhesive.

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