Combustion chamber shell connected through clamping ring

Abstract

The invention discloses a clamping ring connected combustion chamber shell, and relates to the technical field of solid rocket engines, the clamping ring connected combustion chamber shell comprises a shell, a front connecting assembly and a rear connecting assembly, the front connecting assembly comprises a front connector, a front blocking cover and a front clamping ring, and a first baffle ring is arranged at the end, located in the shell, of the front connector; a first annular step and a first clamping ring groove are sequentially arranged on the inner ring face of the first baffle ring from back to front, the edge of the front blocking cover can be in lap joint with the first annular step, and a first annular flange on the outer ring face of the front clamping ring can be inserted into the first clamping ring groove. The rear connecting assembly comprises a rear connector, a rear blanking cap and a rear clamping ring, a second baffle ring is arranged at the end, located in the shell, of the rear connector, a second annular step and a second clamping ring groove are sequentially arranged on the inner ring face of the second baffle ring from front to back, and the edge of the rear blanking cap can be in lap joint with the second annular step. A second annular flange on the outer ring surface of the rear clamping ring can be inserted into the second clamping ring groove; the front clamping ring and the rear clamping ring are each of a sectional type clamping ring structure.

Description

Technical Field

[0001] The invention relates to the technical field of solid rocket engines, in particular to a clamping ring connecting a combustion chamber casing. Background Art

[0002] The combustion chamber casing is a key component of a solid rocket engine. It not only serves as a storage structure for propellant, but also serves as the main load-bearing structure, bearing the internal pressure load generated during the operation of the solid rocket engine.

[0003] In order to ensure the reliable connection of solid rocket engines, the design of the combustion chamber shell must have the characteristics of compact structure, easy operation, light weight and reliable connection. The traditional flange connection method has the problem of large negative mass, and the commonly used L-type snap ring and I-type snap ring connection structure have obvious stress concentration effect on the snap ring groove, which is prone to low-pressure failure of the combustion chamber.

[0004] It can be seen that how to provide a combustion chamber shell with a connection structure that can alleviate stress concentration and facilitate installation is a problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to provide a retaining ring connecting a combustion chamber housing to solve the problems existing in the above-mentioned related technologies. The segmented retaining ring structure has low stress concentration characteristics, which can alleviate the stress concentration phenomenon near the retaining ring groove and improve the bearing capacity and service life of the combustion chamber housing.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a combustion chamber casing connected with a snap ring, comprising an outer shell, a front connection assembly and a rear connection assembly, wherein a combustion chamber inlet is arranged on the front head of the outer shell, and a combustion chamber outlet is arranged on the rear head of the outer shell; the front connection assembly comprises a front joint, a front plugging cover and a front snap ring, the front joint is assembled on the combustion chamber inlet, and a first retaining ring is arranged at one end of the front joint located in the outer shell, a first annular step and a first snap ring groove are arranged on the inner ring surface of the first retaining ring in sequence from back to front, the edge of the front plugging cover can overlap the first annular step, and a first annular flange is arranged on the outer ring surface of the front snap ring, and the first annular flange can be inserted into the first snap ring groove so that the front The edge of the plug cover is clamped between the front retaining ring and the first annular step; the rear connecting assembly includes a rear joint, a rear plug cover and a rear retaining ring, the rear joint is assembled at the combustion chamber outlet, and a second retaining ring is provided at one end of the rear joint located in the outer shell, and a second annular step and a second retaining ring groove are sequentially provided on the inner annular surface of the second retaining ring from front to back, the edge of the rear plug cover can overlap the second annular step, and a second annular flange is provided on the outer annular surface of the rear retaining ring, and the second annular flange can be inserted into the second retaining ring groove so that the edge of the rear plug cover is clamped between the rear retaining ring and the second annular step; the front retaining ring and the rear retaining ring are both segmented retaining ring structures.

[0008] Preferably, the width of the first retaining ring groove gradually decreases from the outside to the inside.

[0009] Preferably, the inner diameter of a side of the first snap ring groove away from the front blocking cover is larger than the inner diameter of a side of the first snap ring groove close to the front blocking cover.

[0010] Preferably, the width of the second retaining ring groove gradually decreases from the outside to the inside.

[0011] Preferably, the inner diameter of the side of the second snap ring groove away from the rear plugging cover is larger than the inner diameter of the side of the second snap ring groove close to the rear plugging cover.

[0012] Preferably, the front connecting assembly further comprises a front sealing ring, and the front sealing ring is embedded in the edge of the front blocking cover.

[0013] Preferably, the rear connection assembly further comprises a rear sealing ring, and the rear sealing ring is embedded in the edge of the rear blocking cover.

[0014] Preferably, the front snap ring is a structure composed of four quarter snap rings.

[0015] Preferably, the rear snap ring is a structure composed of four quarter snap rings.

[0016] Preferably, a heat insulating layer is provided on the inner wall of the shell.

[0017] Compared with the related art, the present invention has achieved the following technical effects:

[0018] The retaining ring connected to the combustion chamber casing provided by the present invention comprises an outer shell, a front connecting assembly and a rear connecting assembly, the front connecting assembly comprises a front joint, a front plugging cover and a front retaining ring, the rear connecting assembly comprises a rear joint, a rear plugging cover and a rear retaining ring, wherein the front retaining ring and the rear retaining ring are both segmented retaining ring structures, the front joint is assembled on the combustion chamber inlet on the front head of the outer shell, and a first retaining ring is provided at one end of the front joint located in the outer shell, a first retaining ring is provided on the inner ring surface of the first retaining ring, a first annular step and a first retaining ring groove are provided in sequence from back to front, the front plugging cover is first placed in the front joint so that the edge of the front plugging cover overlaps the first annular step, and then the front retaining ring is inserted into the first retaining ring groove through the first annular flange on its outer ring surface, so that the edge of the front plugging cover is clamped between the front retaining ring and the first annular step, thereby completing the assembly of the front connecting assembly, and the assembly of the rear connecting assembly is similar.

[0019] The present invention arranges a first annular flange on the front retaining ring so that the front retaining ring is tightly connected to the first retaining ring groove in the front joint through the first annular flange, and arranges a second annular flange on the rear retaining ring so that the rear retaining ring is tightly connected to the second retaining ring groove in the rear joint through the second annular flange, thereby increasing the contact area between the retaining ring and the corresponding joint, effectively alleviating the stress concentration phenomenon near the retaining ring groove, and improving the bearing capacity and service life of the combustion chamber housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of an explosion structure of a combustion chamber casing connected to a clamp ring provided in an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of a front retaining ring provided in an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of a rear retaining ring provided in an embodiment of the present invention;

[0024] Figure 4 A cross-sectional view of a combustion chamber housing connected to a clamp ring provided in an embodiment of the present invention;

[0025] Figure 5 A partial enlarged view of the connection portion of the front retaining ring provided in an embodiment of the present invention.

[0026] In the figure: 1-housing, 101-insulating layer, 2-front connecting assembly, 201-front joint, 202-front plugging cover, 203-front retaining ring, 204-first annular step, 205-first retaining ring groove, 206-front sealing ring, 3-rear connecting assembly, 301-rear joint, 302-rear plugging cover, 303-rear retaining ring, 304-rear sealing ring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The purpose of the present invention is to provide a clamping ring connecting a combustion chamber housing to solve the problems existing in the related technology. The segmented clamping ring structure has a low stress concentration characteristic, which can alleviate the stress concentration phenomenon near the clamping ring groove and improve the bearing capacity and service life of the combustion chamber housing.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1-Figure 5As shown, this embodiment provides a retaining ring connected to a combustion chamber housing, comprising an outer shell 1, a front connecting assembly 2 and a rear connecting assembly 3. The front head of the outer shell 1 is provided with a combustion chamber inlet, and the rear head of the outer shell 1 is provided with a combustion chamber outlet; the front connecting assembly 2 comprises a front joint 201, a front plugging cover 202 and a front retaining ring 203, the front joint 201 is assembled at the combustion chamber inlet, and a first retaining ring is provided at one end of the front joint 201 located in the outer shell 1, and a first annular step 204 and a first retaining ring groove 205 are sequentially provided on the inner annular surface of the first retaining ring from back to front, the edge of the front plugging cover 202 can overlap the first annular step 204, and the provision of the first annular step 204 limits the axial movement of the front plugging cover 202, and a first annular flange is provided on the outer annular surface of the front retaining ring 203, and the first annular flange can The rear connecting assembly 3 comprises a rear joint 301, a rear joint cover 302 and a rear snap ring 303, the rear joint 301 is assembled at the outlet of the combustion chamber, and a second retaining ring is provided at one end of the rear joint 301 located in the outer shell 1, and a second annular step and a second snap ring groove are sequentially provided on the inner annular surface of the second retaining ring from front to back, the edge of the rear cover 302 can overlap on the second annular step, and the setting of the second annular step limits the axial movement of the rear cover 302, and a second annular flange is provided on the outer annular surface of the rear snap ring 303, and the second annular flange can be inserted into the second snap ring groove, so that the edge of the rear cover 302 is clamped between the rear snap ring 303 and the second annular step.

[0031] In this embodiment, the front snap ring 203 and the rear snap ring 303 are both segmented snap ring structures; specifically, Figure 2-Figure 3 As shown, the front snap ring 203 and the rear snap ring 303 are both quarter-segmented snap ring structures, that is, the front snap ring 203 and the rear snap ring 303 are both structures composed of four quarter snap rings. The segmented snap ring structure is easy to install and disassemble.

[0032] In this embodiment, the width of the first snap ring groove 205 and the width of the second snap ring groove both gradually decrease from the outside to the inside; specifically, Figure 4-Figure 5 As shown, the connection of the front snap ring 203 is described. The cross section of the first annular flange on the front snap ring 203 is a combination of an isosceles trapezoid and a semicircle. The front snap ring 203 is closely connected to the first snap ring groove 205 in the front joint 201 through the first annular flange. Accordingly, the width of the first snap ring groove 205 gradually decreases from the outside to the inside, that is, Figure 5 The width of the first snap ring groove 205 decreases gradually from left to right, and, as Figure 5As shown, in this embodiment, a chamfer is further provided at the connection between the upper edge of the first retaining ring groove 205 and the first annular flange, so as to reduce the stress concentration phenomenon near the first retaining ring groove 205 by increasing the contact area between the front retaining ring 203 and the front joint 201. The design of the second retaining ring groove is similar.

[0033] In this embodiment, the inner diameter of the first snap ring groove 205 away from the front blocking cover 202 is larger than the inner diameter of the first snap ring groove 205 close to the front blocking cover 202 , which facilitates installation and removal of the front blocking cover 202 .

[0034] In this embodiment, the inner diameter of the side of the second snap ring groove away from the rear plugging cover 302 is larger than the inner diameter of the side of the second snap ring groove close to the rear plugging cover 302 , which facilitates installation and removal of the rear plugging cover 302 .

[0035] In this embodiment, the front connecting assembly 2 further includes a front sealing ring 206, which is embedded in the edge of the front blocking cover 202. The front sealing ring 206 is used to prevent gas leakage in the combustion chamber shell after the front blocking cover 202 is deformed.

[0036] In this embodiment, the rear connection assembly 3 further includes a rear sealing ring 304, which is embedded in the edge of the rear plugging cover 302. The rear sealing ring 304 is used to prevent gas leakage in the combustion chamber shell after the rear plugging cover 302 is deformed.

[0037] In this embodiment, a heat insulating layer 101 is provided on the inner wall of the outer shell 1; specifically, the outer shell 1 in this embodiment is preferably a carbon fiber composite material winding molded outer shell, and a rubber heat insulating layer is attached to the inside thereof.

[0038] In summary, the retaining ring provided by the present invention is connected to the combustion chamber housing and has a segmented retaining ring structure with low stress concentration characteristics, which reduces the stress concentration phenomenon near the retaining ring groove, is easy to install and disassemble, has a compact structure, and meets the lightweight design requirements.

[0039] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A clamping ring connected to a combustion chamber housing, characterized in that: The invention comprises an outer shell, a front connection assembly and a rear connection assembly, wherein the front cover of the outer shell is provided with a combustion chamber inlet, and the rear cover of the outer shell is provided with a combustion chamber outlet; the front connection assembly comprises a front joint, a front plugging cover and a front retaining ring, the front joint is assembled at the combustion chamber inlet, and a first retaining ring is provided at one end of the front joint located in the outer shell, a first annular step and a first retaining ring groove are sequentially provided on the inner ring surface of the first retaining ring from back to front, the edge of the front plugging cover can overlap the first annular step, and a first annular flange is provided on the outer ring surface of the front retaining ring, and the first annular flange can be inserted into the first retaining ring groove so that the edge of the front plugging cover can be clamped on the first annular step. The front retaining ring is between the front retaining ring and the first annular step; the rear connecting assembly includes a rear joint, a rear plugging cover and a rear retaining ring, the rear joint is assembled at the combustion chamber outlet, and a second retaining ring is provided at one end of the rear joint located in the outer shell, and a second annular step and a second retaining ring groove are sequentially provided on the inner annular surface of the second retaining ring from front to back, the edge of the rear plugging cover can overlap the second annular step, and a second annular flange is provided on the outer annular surface of the rear retaining ring, and the second annular flange can be inserted into the second retaining ring groove so that the edge of the rear plugging cover is clamped between the rear retaining ring and the second annular step; the front retaining ring and the rear retaining ring are both segmented retaining ring structures.

2. The clamping ring connected combustion chamber housing according to claim 1, characterized in that: The width of the first snap ring groove gradually decreases from the outside to the inside.

3. The clamping ring connected combustion chamber housing according to claim 1, characterized in that: The inner diameter of a side of the first snap ring groove away from the front blocking cover is larger than the inner diameter of a side of the first snap ring groove close to the front blocking cover.

4. The clamping ring connected combustion chamber housing according to claim 1, characterized in that: The width of the second snap ring groove gradually decreases from the outside to the inside.

5. The clamping ring connected combustion chamber housing according to claim 1, characterized in that: The inner diameter of a side of the second snap ring groove away from the rear plugging cover is larger than the inner diameter of a side of the second snap ring groove close to the rear plugging cover.

6. The clamping ring connected combustion chamber housing according to claim 1, characterized in that: The front connection assembly also includes a front sealing ring, which is embedded in the edge of the front blocking cover.

7. The clamping ring connected combustion chamber casing according to claim 1, characterized in that: The rear connection assembly also includes a rear sealing ring, which is embedded in the edge of the rear blocking cover.

8. The clamping ring connected combustion chamber housing according to claim 1, characterized in that: The front snap ring is a structure composed of four quarter snap rings.

9. The clamping ring connected combustion chamber housing according to claim 1, characterized in that: The rear snap ring is a structure composed of four quarter snap rings.

10. The clamping ring connected combustion chamber housing according to any one of claims 1 to 9, characterized in that: A heat insulating layer is arranged on the inner wall of the shell.

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