CN-119778118-B - Combustion chamber structure capable of limiting shrinkage deformation of head medicine surface

CN119778118BCN 119778118 BCN119778118 BCN 119778118BCN-119778118-B

Abstract

The invention discloses a combustion chamber structure for limiting shrinkage deformation of a head medicine surface, which comprises a medicine column, a shell with an insulating layer and a lining layer, wherein the combustion chamber structure also comprises an insulating ring, the insulating ring is positioned at the head of the combustion chamber and is adhered to the shell with the insulating layer through an adhesive, and the medicine column is adhered to the shell with the insulating layer and the insulating ring through the lining layer. According to the invention, the heat-insulating ring with a limiting function is arranged on the top medicine surface of the combustion chamber, so that radial shrinkage deformation of the top medicine surface is effectively prevented, the problem of assembly interference between the inner molded surface of the medicine column and the ignition device due to solidification deformation is avoided, the danger caused by manual shaping of the medicine surface is avoided, meanwhile, the slit formed between the heat-insulating ring and the ignition device can effectively prevent the ignition device from falling off due to ablation, and then the phenomena of pushing and pressure oscillation possibly caused by the phenomenon are avoided, thereby being beneficial to improving the working efficiency of the solid rocket engine, having simple process and higher universality, being beneficial to reducing the production and maintenance cost and realizing cost reduction and efficiency enhancement.

Inventors

WANG WEILIANG
FANG BING
YANG PENG
WANG YANBIN
HE PENG
SUN FUHE

Assignees

上海新力动力设备研究所

Dates

Publication Date: 20260508
Application Date: 20241226

Claims (6)

1. The combustion chamber structure for limiting shrinkage deformation of the head medicine surface comprises a medicine column (1), a shell with a heat insulation layer (2) and a lining layer (4), and is characterized by further comprising a heat insulation ring (3); the heat insulation ring (3) is positioned at the head part of the combustion chamber and is bonded with the shell (2) with the heat insulation layer through an adhesive; The heat insulation ring (3) is bonded with the grain (1) through the lining layer (4), and the grain (1) is bonded with the shell (2) with the heat insulation layer through the lining layer (4); The heat insulation ring (3) has a limiting function, and radial shrinkage deformation of the medicine surface of the head is prevented through the hardness of the material; a slit is formed between the heat insulation ring (3) and the ignition device arranged at the head part of the combustion chamber so as to protect the ignition device from ablation and falling off, and the cross section of the heat insulation ring (3) is L-shaped.
2. A combustion chamber structure for limiting shrinkage deformation of a medicinal surface of a head according to claim 1, wherein the heat insulating ring (3) is made of an ablation resistant phenolic resin.
3. A combustion chamber structure for limiting shrinkage deformation of a medicinal surface of a head according to claim 1, wherein the thickness of the heat insulating ring (3) is 1mm.
4. A combustion chamber structure limiting shrinkage deformation of a head charge according to claim 1, wherein the material of the charge (1) is a solid propellant.
5. A combustion chamber structure limiting shrinkage deformation of a top charge according to claim 1, wherein the charge (1) is a tube slot charge in the form of a female combustion.
6. A combustion chamber structure for limiting shrinkage deformation of a powder surface of a head according to claim 1, wherein the outer diameter of the powder column (1) is phi 359.8mm, and the inner diameter is phi 173 mm-phi 176mm.

Description

Combustion chamber structure capable of limiting shrinkage deformation of head medicine surface Technical Field The invention belongs to the technical field of solid rocket engine combustion chamber structural design, and particularly relates to a combustion chamber structure capable of limiting shrinkage deformation of a head medicine surface. Background The combustion chamber charge is one of the important parts in the structure of solid rocket engines, and provides power for the engines so as to push missile bodies. However, the solid propellant grains shrink and deform in the axial direction and the radial direction due to the stress generated in the solid propellant grains in the cooling and solidifying process, and for the ignition device arranged at the head of the combustion chamber, the radial shrinkage of the inner molded surface of the grains can cause the problem of the assembly interference between the inner molded surface of the head of the combustion chamber and the ignition device in the final assembly process, so that the normal assembly cannot be realized, and therefore, a method of reserving a certain gap between the inner molded surface of the grains and the ignition device is generally adopted in the design process to avoid. However, reasonable design of the reserved gaps faces challenges, on one hand, for engines with different diameters, the shrinkage of the inner molded surface of the explosive column in the curing process is different and can only be estimated empirically during design, on the other hand, the mechanical property of the propellant is greatly influenced by seasonal changes, the shrinkage of the inner molded surface of the explosive column in the curing process in different seasons is also different, and once the explosive surface is deformed, manual shaping is needed to eliminate interference, so that the danger is increased. In addition, the unreasonable reserved gap can cause the ignition device to drop off due to ablation, so that pushing and pressure oscillation are excited to influence the working efficiency of the solid rocket engine. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides the combustion chamber structure capable of limiting the shrinkage deformation of the head powder, and the heat insulation ring with the limiting function is arranged on the head powder of the combustion chamber, so that the radial shrinkage deformation of the head powder is effectively prevented, the problem that the inner molded surface of a powder column is interfered with an ignition device due to solidification deformation is avoided, the danger caused by manual shaping of the powder column is avoided, meanwhile, the slit formed between the heat insulation ring and the ignition device effectively prevents the ignition device from falling off due to ablation, the pushing and pressure oscillation phenomena possibly caused by the ablation are avoided, and the reliability of the solid rocket engine in working is improved. The specific technical scheme of the invention is as follows: the utility model provides a restriction head medicine face shrink deformation's combustion chamber structure, includes grain, takes heat insulating layer casing, lining, combustion chamber structure still includes the heat insulating ring, the heat insulating ring is located combustion chamber head, bonds with taking the heat insulating layer casing through the adhesive, the grain passes through the lining and bonds with taking heat insulating layer casing, heat insulating ring. The heat insulation ring has a limiting function, and when the heat insulation ring is coated on the explosive surface of the explosive column, which is close to the head part of the combustion chamber, the radial shrinkage deformation of the inner molded surface of the explosive column is prevented through the hardness of the material. A slit is formed between the heat insulating ring and the ignition device arranged at the head part of the combustion chamber so as to prevent the ignition device from being ablated and falling off. Preferably, the material of the heat insulation ring is ablation resistant phenolic resin. Preferably, the heat insulating ring has an L-shaped cross section. Preferably, the thickness of the insulating ring is 1mm. Preferably, the material of the cartridge is a solid propellant. Preferably, the cartridge is a tube slot type charge in the form of an in-bore combustion. Preferably, the outer diameter of the grain is phi 359.8mm, and the inner diameter is phi 173 mm-phi 176mm. The invention has the following beneficial effects: (1) According to the invention, the heat-insulating ring is arranged on the top medicine surface of the combustion chamber to limit the top medicine surface, and the heat-insulating ring is respectively firmly adhered to the heat-insulating layer and the medicine column through the adhesive and the lining layer, so that under the c