Diaphragm type arched compartment device and engine

Abstract

The utility model provides a diaphragm type arch-shaped compartment device. The diaphragm type arch-shaped compartment device comprises an arch-shaped supporting piece, an arch-shaped diaphragm and a heat-proof structure. Wherein the arched supporting piece is provided with a first convex surface and a first concave surface which are opposite; the arched diaphragm is provided with a second convex surface and a second concave surface which are opposite, and the arched diaphragm is configured to be fixed to the arched supporting piece on the side where the first convex surface is located; a heat shield structure is secured to the arcuate support and the arcuate membrane. The utility model further provides an engine. The diaphragm type arched compartment device is simple in structure, light in weight, high in forward pressure bearing intensity, low in reverse opening intensity, reliable in sealing and good in heat insulation performance, and the intermittent working function of the solid engine can be reliably achieved.

Description

Technical Field

[0001] This utility model relates to the field of solid rocket engine technology, specifically to a diaphragm-type arched compartment device and engine. Background Technology

[0002] A solid-fuel pulse engine essentially divides the combustion chamber of a solid-fuel engine into multiple sections using isolation devices, allowing for multiple shutdowns and restarts. Aircraft using solid-fuel pulse engines as their power source can achieve optimal control of flight trajectories and optimal management of engine energy through onboard control programs, thereby comprehensively improving the performance of various types of aircraft.

[0003] The isolation device is an important component of a solid pulse engine. During the operation of the previous pulse, the isolation device completely separates the two adjacent pulse combustion chambers. The isolation device plays a role in heat insulation, sealing and load bearing, ensuring that the main charge in the subsequent pulse combustion chamber is not ignited. During the operation of the subsequent pulse, the isolation device opens smoothly without producing harmful debris, thus effectively realizing the function of intermittent pulse operation of the engine.

[0004] Isolation devices are divided into compartmentalized and layered types. Due to the harsh and special operating conditions of compartmentalized devices and their high performance requirements, they must withstand the high voltage of the preceding pulse while ensuring reliable opening under low pressure in the reverse direction (the following pulse), and no debris should be ejected during opening to avoid affecting the engine's operational safety. At the same time, they need to be lightweight, have good heat insulation, and be reliably sealed. Therefore, it is necessary to develop compartmentalized devices with the above characteristics to effectively achieve the function of intermittent pulse operation and meet the urgent needs of many aircraft. Utility Model Content

[0005] In a first aspect of this utility model, a diaphragm-type arched compartment device is provided, comprising: an arched support member, an arched diaphragm, and a heat-resistant structure; wherein,

[0006] The arched support has a first convex surface and a first concave surface;

[0007] The arched diaphragm has opposing second convex and second concave surfaces, and the arched diaphragm is configured to be fixed to the arched support on the side where the first convex surface is located;

[0008] The heat-resistant structure is fixed to the arched support and the arched diaphragm.

[0009] Optionally, the heat-resistant structure includes a first heat-resistant layer and a second heat-resistant layer;

[0010] The first heat-resistant layer is bonded to the second convex surface;

[0011] The arched support has an annular plane formed around the first concave surface, and the second heat-insulating layer is bonded to the annular plane.

[0012] Optionally, a plurality of weakening grooves are provided on the second convex surface;

[0013] The first heat-insulating layer has multiple gaps;

[0014] The first heat-insulating layer is bonded to the second convex surface, and multiple gaps correspond one-to-one with multiple weakening grooves, with fillers provided in the gaps.

[0015] Optionally, the projection of the second convex surface along the axial direction is circular, and a plurality of weakening grooves extend radially through the center of the circle and are evenly distributed in the circumferential direction. The cross-sectional shape of a single weakening groove is V-shaped, and the depth of the weakening groove decreases in the radial outward direction from the center of the second convex surface.

[0016] Optionally, a weakening blind hole is also provided at the top center of the second convex surface.

[0017] Optionally, the arched support is provided with multiple ventilation holes;

[0018] The cross-sectional shape of a single vent is fan-shaped, and multiple vents are arranged radially and in multiple nested layers; and in the axial side projection, multiple weakening grooves do not overlap with multiple vents in the outer layer.

[0019] Furthermore, multiple vents are configured such that the ventilation area of ​​the support accounts for more than 45% of the total cross-sectional area of ​​the support.

[0020] Optionally, the arched support also has a first welding mating surface formed around the first convex surface;

[0021] The arched diaphragm has a second welding mating surface formed around the second concave surface;

[0022] The arched diaphragm is welded to the first welding joint at the second welding joint.

[0023] Optionally, the thickness of the arched support increases radially outward from the top center; and / or,

[0024] A smooth transition exists between the second concave surface and the second welding mating surface; and / or,

[0025] The arched support also has a radial side located between the annular plane and the first welded joint surface, wherein a sealing groove is provided on the radial side of the arched support.

[0026] Optionally, the arched support is made of aluminum alloy LY12;

[0027] The arched diaphragm is made of aluminum alloy LY12;

[0028] The heat-resistant structure is made of rubber or aerogel.

[0029] In a second aspect of this utility model, an engine is provided, the engine comprising:

[0030] The aforementioned diaphragm-type arched compartment device;

[0031] A first pulse housing, wherein a first step is provided on the first pulse housing; and

[0032] The second pulse housing has a second step.

[0033] The diaphragm-type arched compartment device is sandwiched between the first and second steps in the axial direction.

[0034] The diaphragm-type arched compartment device of this utility model includes an arched support, an arched diaphragm, and a heat-insulating structure. The arched support has a first convex surface and a first concave surface, and the arched diaphragm has a second convex surface and a second concave surface. The arched diaphragm is configured to be fixed to the arched support on the side where the first convex surface is located. The heat-insulating structure is fixed to the arched support and the arched diaphragm, making the diaphragm-type arched compartment device simple in structure, light in weight, high in positive pressure resistance, low in negative pressure resistance, reliable in sealing, and good insulation performance. It can reliably realize the function of intermittent operation of solid rocket motor.

[0035] The engine of this invention can effectively manage the energy of a solid rocket motor by using a diaphragm-type arched compartment device, thus meeting higher performance requirements.

[0036] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0037] The features, advantages, and exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals indicate the same elements, and wherein:

[0038] Figure 1 This is a schematic diagram of the structure of the diaphragm-type arched compartment device according to an embodiment of the present invention, wherein, Figure 1 (a) is a sectional view. Figure 1 (b) is from Figure 1 (a) is the view when viewed from direction D. Figure 1 (c) is from Figure 1 (a) is the view when viewed from direction B.

[0039] Figure 2 It has Figure 1A partial structural diagram of the engine of the diaphragm-type arched compartment device is shown.

[0040] Figure 3 yes Figure 1 The schematic diagram of the arched diaphragm of the diaphragm-type arched compartment device shown is as follows: Figure 3 (a) is a view taken from the second convex side of the arched diaphragm. Figure 3 (b) is along Figure 3 (a) Sectional view of line AA. Figure 3 (c) is along Figure 3 (a) is a partial sectional view of the CC line.

[0041] Figure 4 yes Figure 1 The schematic diagram shown is of the arched support component of the diaphragm-type arched compartment device, wherein... Figure 4 (a) is a sectional view of the arched support member. Figure 4 (b) is a view taken from the first concave side of the arch support.

[0042] In the figure, the attached figures are labeled as follows:

[0043] 7-Arched compartment device, 1-Arched support, 11-Annular plane, 12-Sealing groove, 13-First concave surface, 14-Ventilation hole, 15-First convex surface, 16-Radial side surface, 17-First welding butt surface, 18-Reinforcing rib, 2-Arched diaphragm, 21-Weakening groove, 22-Second convex surface, 23-Weakening blind hole, 24-Filling element, 25-Second concave surface, 26-Second welding butt surface, 3-First heat-insulating layer, 4-Second heat-insulating layer, 5-Second pulse shell, 51-Second step, 8-First pulse shell, 81-First step, 6-Sealing element, 9-First pulse combustion chamber, 10-Second pulse combustion chamber, 300-Heat-insulating structure. Detailed Implementation

[0044] The exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is by no means a limitation of the present invention or its applications or uses. Furthermore, the dimensions and proportions of the components in the drawings are merely schematic and do not strictly correspond to actual products.

[0045] This utility model provides a diaphragm-type arched compartment device 7, such as Figure 1 As shown, the diaphragm-type arched compartment device 7 includes: an arched support 1, an arched diaphragm 2, and a heat-resistant structure 300; wherein, as Figure 4 As shown, the arched support 1 has a first convex surface 15 and a first concave surface 13; as Figure 3As shown, the arched diaphragm 2 has a second convex surface 22 and a second concave surface 25, and the arched diaphragm 2 is configured to be fixed to the arched support 1 on the side where the first convex surface 15 is located; the heat-resistant structure 300 is fixed to the arched support 1 and the arched diaphragm 2.

[0046] The diaphragm-type arched compartment device 7 of this utility model embodiment includes an arched support 1, an arched diaphragm 2, and a heat-insulating structure 300. The arched support 1 has a first convex surface 15 and a first concave surface 13, and the arched diaphragm 2 has a second convex surface 22 and a second concave surface 25. The arched diaphragm 2 is configured to be fixed to the arched support 1 on the side where the first convex surface 15 is located. The heat-insulating structure 300 is fixed to the arched support 1 and the arched diaphragm 2, making the diaphragm-type arched compartment device 7 simple in structure and light in weight. It has high pressure resistance when the first pulse (forward) is working and low opening pressure when the second pulse (reverse) is working. It has reliable sealing and good heat insulation performance, and can reliably realize the function of intermittent operation of solid rocket motor. Specifically, the arched diaphragm 2 and the arched support 1 are designed together to form an arched composite structure. This ensures that the diaphragm-type arched compartment device 7 can withstand higher pressure in the forward direction without structural damage, and is lighter in weight while withstanding the same pressure. Meanwhile, the relatively complex structures of the arched support 1 and the arched diaphragm 2 are addressed with a split-type design, reducing molding difficulty and improving product reliability. For surfaces exposed to exhaust gases and in contact with the engine installation, a heat-resistant structure 300 of appropriate thickness is designed to prevent high-temperature strength loss in the diaphragm-type arched compartment device 7. The diaphragm-type arched compartment device 7 has a forward pressure greater than 35.0 MPa, a reverse opening pressure not greater than 4.0 MPa, and a mass not greater than 0.4 kg. Using the diaphragm-type arched compartment device 7 on larger dual-pulse engines effectively achieves energy management for solid rocket motors, meeting higher performance requirements.

[0047] This utility model also provides an engine, such as Figure 2 As shown, the engine (not labeled in the figure) includes: the aforementioned diaphragm-type arched compartment device 7, a first pulse housing 8, and a second pulse housing 5; a first step 81 is provided on the first pulse housing 8, and a second step 51 is provided on the second pulse housing 5; wherein, the diaphragm-type arched compartment device 7 is sandwiched between the first step 81 and the second step 51 in the axial direction. The engine of this embodiment of the invention, by using the diaphragm-type arched compartment device 7, can effectively realize energy management of the solid rocket motor and adapt to higher performance requirements. The engine of this embodiment of the invention can be a solid rocket dual-pulse engine or a multi-pulse engine.

[0048] The following will describe in more detail the diaphragm-type arched compartment device 7 and the composition of the engine in the embodiments of this utility model, with reference to the accompanying drawings.

[0049] In some embodiments, combined with Figure 1 , Figure 3 and Figure 4 The heat-resistant structure 300 includes a first heat-resistant layer 3 and a second heat-resistant layer 4; the first heat-resistant layer 3 is bonded to a second convex surface 22; the arched support 1 has an annular plane 11 formed around a first concave surface 13, and the second heat-resistant layer 4 is bonded to the annular plane 11. By providing the first heat-resistant layer 3 on the second convex surface 22 facing the first pulse combustion chamber and the second heat-resistant layer 4 on the annular plane 11 formed around the first concave surface 13, the diaphragm-type arched compartment device 7 can be guaranteed not to experience high-temperature strength loss. By bonding the first heat-resistant layer 3 to the second convex surface 22 and the second heat-resistant layer 4 to the annular plane 11, a quick and stable connection between the first heat-resistant layer 3 and the second convex surface 22, and a quick and stable connection between the second heat-resistant layer 4 and the arched support 1 can be achieved.

[0050] In some embodiments, such as Figure 1 and Figure 3 As shown, the second convex surface 22 is provided with a plurality of weakening grooves 21; the first heat-insulating layer 3 is provided with a plurality of gaps; the first heat-insulating layer 3 is bonded to the second convex surface 22, and the plurality of gaps correspond one-to-one with the plurality of weakening grooves 21, and fillers 24 are provided at the gaps. Specifically, the projection of the second convex surface 22 along the axial direction is circular, and the plurality of weakening grooves 21 extend radially through the center of the circle and are evenly distributed circumferentially, and wherein, as shown in the figure... Figure 3 As shown in (c), the cross-sectional shape of a single weakening groove 21 is V-shaped, and the depth of the weakening groove 21 decreases in the radial direction outward from the center of the second convex surface 22. In some embodiments, as Figure 3 As shown in (b), a weakening blind hole 23 is also provided at the top center of the second convex surface 22. Specifically, the openings of both the V-shaped weakening groove 21 and the weakening blind hole 23 face away from the diaphragm support 1. The filler 24 can be, for example, silicone rubber.

[0051] To ensure the diaphragm-type arched compartment 7 can withstand the high pressure of the first pulse (also known as the preceding pulse), the minimum effective thickness of the arched diaphragm 2 must be guaranteed. Furthermore, the diaphragm-type arched compartment 7 must be able to open smoothly under the action of the second pulse (also known as the subsequent pulse) combustion gas without producing fragments, and the opening pressure must be relatively low. Multiple weakening grooves 21 are provided on the second convex surface 22 of the arched diaphragm 2 near the first pulse side. These grooves pass through the center and are evenly distributed in a petal-like pattern. Each weakening groove 21 has a V-shaped cross-section. The depth of the weakening grooves 21 gradually decreases from the top of the arch towards the outer edge of the arched diaphragm 2. Simultaneously, a weakening blind hole 23 is opened at the center of the top of the arch to further weaken the arched diaphragm 2. In this way, the arched diaphragm 2 can be ensured to crack from the center of the arch top under the second pulse working pressure and gradually expand outward along the weakening groove 21 until it is fully opened. This ensures both the positive pressure bearing capacity of the arched diaphragm 2 and that under the action of the second pulse combustion gas, the arched diaphragm 2 can reliably and smoothly break into a petal shape along the weakening groove 21 without producing fragments, and the opening pressure is controlled below 4.0 MPa. Figure 3 As shown in (a), the arched diaphragm 2 typically has eight weakening grooves 21, radiating outwards from the center. The specific thickness of the arched diaphragm 2 and the specific depth of the weakening grooves 21 can be set according to actual application needs and are not limited here. Optionally, the arched diaphragm 2 may have other numbers of weakening grooves 21, for example, the arched diaphragm 2 may have 4, 6, 10 or 12 weakening grooves 21.

[0052] like Figure 4 As shown, the arched support 1 of the diaphragm-type arched compartment device 7 has an arched hollow structure. Multiple vents 14 are provided on the arched support 1; the cross-sectional shape of a single vent 14 is fan-shaped, and the multiple vents 14 are arranged radially and in multiple nested layers. The distribution of the vents 14 is as follows: Figure 4 As shown in (b), multiple vent holes 14 are regularly distributed, and the shape of a single vent hole 14 is fan-shaped. For example, the arched support member 1 is provided with three layers of vent holes 14, namely, the first layer is provided with 4 vent holes 14, the second layer is provided with 16 vent holes 14, and the third layer is provided with 16 vent holes 14, and the individual ventilation area of ​​the vent holes 14 in the different inner and outer layers is different.

[0053] In the axial lateral projection, the multiple weakening grooves 21 do not overlap with the multiple vent holes 14 located on the outer layer. For example... Figure 4 As shown, the weakening groove 21 does not overlap with the multiple vents 14 located in the second and third layers. The vents located in the inner layer... Figure 4The vents in the first layer are relatively small. By adjusting the thickness and material strength of the arched diaphragm 2, structural damage can be avoided in the area of ​​the arched diaphragm 2 with the weakening groove 21 when subjected to the first pulse high voltage. The vents 14 in the outer layer are larger. By not machining the vents 14 in the area of ​​the outer region of the arched support member 1 corresponding to the weakening groove 21 of the arched diaphragm 2, i.e., by making them into reinforcing ribs 18, structural damage can be avoided in the area of ​​the arched diaphragm 2 with the weakening groove 21 when subjected to the first pulse high voltage. Figure 1 As shown, when the arched support 1 and the arched diaphragm 2 are installed, the two reinforcing ribs 18 of the arched support 1 located at its center line of symmetry correspond to the positions of two of the multiple weakening grooves 21 of the arched diaphragm 2.

[0054] In some embodiments, the plurality of vent holes 14 are configured such that the ventilation area of ​​the support member accounts for more than 45% of the total cross-sectional area of ​​the support member. The plurality of vent holes 14 are configured such that the ventilation area of ​​the arched support member 1 accounts for more than 45% of the total cross-sectional area of ​​the arched support member 1, which ensures that the second pulse combustion gas of the pulse engine can smoothly pass through the diaphragm-type arched compartment device 7. The ventilation area of ​​the arched support member 1 accounts for, for example, 46%, 48%, or 50% of the total cross-sectional area of ​​the arched support member 1.

[0055] In addition, such as Figure 4 As shown in (a), the thickness of the arched support 1 increases radially outward from the center of the arch top. That is, the thickness of the arched support 1 is smaller at the center of the arch top and gradually increases radially outward. This ensures that the arched support 1 can reliably bear pressure, with a pressure greater than 35.0 MPa, while also effectively reducing negative mass and improving the engine's mass ratio.

[0056] In some embodiments, the arched support 1 further has a first welding mating surface 17 formed around the first convex surface 15; the arched diaphragm 2 has a second welding mating surface 26 formed around the second concave surface 25; the arched diaphragm 2 is welded to the first welding mating surface 17 at the second welding mating surface 26. By employing, for example, a vacuum electron beam welding process, in such... Figure 1 Welding is performed at the first welding joint 17 shown in the figure to weld the arched diaphragm 2 and the arched support 1 together, which can achieve a quick and stable connection between the arched diaphragm 2 and the arched support 1.

[0057] In some embodiments, there is a smooth transition between the second concave surface 25 and the second welding mating surface 26. For example... Figure 3 As shown in (b), the transition parts of different shapes of the arched diaphragm 2 are all designed with rounded corners to reduce stress concentration. In this way, the local stress under the load of the arched diaphragm 2 can be further reduced or eliminated, ensuring that its structure remains intact during operation.

[0058] In some embodiments, the arched support 1 further has a radial side surface 16 located between the annular plane 11 and the first welding mating surface 17, wherein a sealing groove 12 is provided on the radial side surface 16 of the arched support 1. Figure 4 As shown in (a), a sealing groove 12 is designed on the radial side 16 of the arched support 1. The sealing groove 12 is an annular groove with a rectangular cross-section, used to install a seal 6 between the diaphragm-type arched compartment device 7 and the second pulse housing 5 to achieve sealed isolation between adjacent pulse combustion chambers. The seal 6 can be a sealing ring or a sealing gasket.

[0059] In the diaphragm-type arched compartment device 7 of this utility model embodiment, when the first pulse is working, the high-temperature and high-pressure gas acts on the first heat-insulating layer 3, and then acts on the arched support member 1 through the arched diaphragm 2. The arched support member 1 provides load-bearing support. In addition, the seal between the diaphragm-type arched compartment device 7 and the installation structure of the pulse engine ensures that the working gas of the first pulse combustion chamber 9 is isolated from the second pulse combustion chamber 10. At the same time, a heat-insulating structure 300 is provided to protect the diaphragm-type arched compartment device 7 from heat damage, preventing its structure from failing due to heat and achieving complete isolation between the preceding and following pulses. When the second pulse is working, the high-temperature and high-pressure gas acts on the arched diaphragm 2 through the arched support member 1. The arched diaphragm 2 cracks along the weakening groove 21 under stress, thereby opening the diaphragm-type arched compartment device 7.

[0060] The following provides an exemplary description of the materials, dimensions, and manufacturing processes of each component of the diaphragm-type arched compartment device 7.

[0061] Both the arched support 1 and the arched diaphragm 2 can be made of aluminum alloy LY12, etc. The density of aluminum alloy LY12 is 2.78 g / cm³. 3 It has relatively low strength, a tensile strength greater than 420MPa, good processability, and is relatively cheaper. Compared with steel, it can effectively reduce the negative weight of components, making it the preferred material. The arched support 1 and the arched diaphragm 2 are separately processed and then welded together by vacuum electron beam.

[0062] The heat-resistant structure 300 is a lightweight heat-resistant structure, and its material can be rubber (e.g., nitrile rubber, ethylene propylene rubber) or aerogel. To ensure that the propellant and ignition in the second pulse combustion chamber 10 are not ignited during the first pulse operation, and to prevent thermal runaway and structural damage to the diaphragm-type arched compartment device 7, the heat-resistant structure 300 material has excellent heat insulation performance and is lightweight. Preferably, the side of the diaphragm-type arched compartment device 7 closest to the first pulse combustion chamber 9 uses aerogel material; that is, the first heat-resistant layer 3 is an aerogel layer, formed by atmospheric pressure drying and then bonded to the arched diaphragm 2. This material, as a mature and excellent heat-insulating material, has a density of 2.78 g / cm³. 3The thermal conductivity is 0.025 W / m·K, the specific heat capacity is 1.4 J / g·K, and the product has good molding processability, which can further reduce negative quality. More preferably, the first heat-insulating layer 3 and the second heat-insulating layer 4 are both aerogel layers. The heat-insulating structure 300 can be formed by atmospheric pressure drying mold, and the welded assembly of the heat-insulating structure 300 with the arched support 1 and the arched diaphragm 2 is bonded with adhesive.

[0063] Seal 6 can be obtained by compression molding.

[0064] like Figure 2 As shown, it has Figure 1 The diagram shows a partial structural schematic of the engine of the diaphragm-type arched compartment device 7. The diaphragm-type arched compartment device 7 is installed in a two-stage pulse engine (…). Figure 2 (Only a portion of the engine is shown in the image) The diaphragm-type arched compartment device 7 is positioned in the middle of the corresponding part of the second pulse housing 5. The first heat-insulating layer 3 and the second convex surface 22 of the diaphragm-type arched compartment device 7 are adjacent to the first pulse combustion chamber 9 of the first pulse. On the radial side, a sealing element 6 is placed in the sealing groove 12 of the arched support 1 of the diaphragm-type arched compartment device 7 to seal between the front and rear pulse combustion chambers. A first step 81 is provided on the first pulse housing 8, and a second step 51 is provided on the second pulse housing 5. The diaphragm-type arched compartment device 7 is axially sandwiched between the first step 81 and the second step 51. In other words, the diaphragm arched compartment device 7 is axially limited by the first step 81 on the first pulse housing 8 and the second step 51 on the second pulse housing 5. The first step 81 is used to prevent the diaphragm arched compartment device 7 from moving towards the first pulse combustion chamber 9 when the second pulse is working, and the second step 51 is used to prevent the diaphragm arched compartment device 7 from moving towards the second pulse combustion chamber 10 when the first pulse is working. This achieves complete positioning of the diaphragm arched compartment device 7 and isolation between the first pulse combustion chamber 9 and the second pulse combustion chamber 10.

[0065] The assembly process of the diaphragm-type arched compartment device 7 is described below, with the specific steps as follows:

[0066] In the first step, the arched support 1, the arched membrane 2, the first heat-insulating layer 3, and the second heat-insulating layer 4 are each formed independently.

[0067] The second step involves employing a vacuum electron beam welding process, such as... Figure 1 Welding is performed at the first welding joint surface 17 shown to weld the arched diaphragm 2 and the arched support 1 together to obtain a welded assembly. During welding, it is necessary to ensure that the positions of two of the eight weakening grooves 21 on the second convex surface 22 of the arched diaphragm 2 coincide with the two reinforcing ribs 18 of the arched support 1 located at the center line of symmetry.

[0068] The third step involves bonding the molded first heat-insulating layer 3 to the second convex surface 22 with the weakening groove 21 of the arched diaphragm 2 of the aforementioned welded assembly. During construction, a pressure process may be used if necessary. The first heat-insulating layer 3 has eight through-slits (not labeled in the figure) prefabricated, which are aligned with the eight weakening grooves 21 on the arched diaphragm 2, and the slits are filled with a filler 24 (e.g., silicone rubber).

[0069] The fourth step is to bond the molded second heat-resistant layer 4 to the annular plane 11 of the arched support member 1 of the aforementioned welded assembly. During construction, a pressure process may be used if necessary.

[0070] This completes the molding of the diaphragm-type arched compartment device 7.

[0071] like Figure 1 As shown in (b), it is from Figure 1 The diagram obtained when viewed from direction D in (a), i.e., the view of the arched top, shows that the projection of the diaphragm arched compartment device 7 is a circular structure. At this time, the arched top presents eight non-through weakening grooves 21 that are radially arranged and filled by the filler 24.

[0072] like Figure 1 As shown in (c), it is from Figure 1 The diagram obtained when viewed from direction B in (a), i.e., the view of the arched concave part, shows that the projection of the diaphragm arched compartment device 7 is a circular structure. The first concave surface 13 of the arched support 1 is provided with radial vents 14. The projection shape of the vents 14 is fan-shaped, with three layers in the radial direction, inside and outside.

[0073] The diaphragm-type arched compartment device 7 of this utility model embodiment has a simple structure and light weight. It has high pressure resistance during the first pulse operation and low opening pressure during the second pulse operation. It has reliable sealing and good heat insulation performance, and can reliably realize the function of intermittent operation of solid rocket motor.

[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "one example," "some embodiments," or "preferred embodiment," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0075] The embodiments of this utility model have been described in detail above. However, aspects of this utility model are not limited to the embodiments described above. Various modifications and substitutions can be applied to the above embodiments without departing from the scope of this utility model.

Claims

1. A diaphragm dome compartmentalization device, characterized in that, The membrane arched cabin device comprises an arched support, an arched membrane, and a heatproof structure, wherein The arched support has a first convex surface and a first concave surface opposite to each other; The arched membrane has a second convex surface and a second concave surface opposite to each other, and is fixed to the arched support on the side of the first convex surface; The heatproof structure is fixed to the arched support and the arched membrane.

2. The membrane arched cabin device according to claim 1, wherein The heatproof structure comprises a first heatproof layer and a second heatproof layer; The first heatproof layer is bonded to the second convex surface; The arched support has a ring-shaped plane formed around the first concave surface, and the second heatproof layer is bonded to the ring-shaped plane.

3. The membrane arched cabin device according to claim 2, wherein A plurality of weakening grooves are arranged on the second convex surface; A plurality of slits are arranged on the first heatproof layer; The first heatproof layer is bonded to the second convex surface, the plurality of slits correspond to the plurality of weakening grooves one by one, and a filler is arranged at the slits.

4. The membrane arched cabin device according to claim 3, wherein The projection of the second convex surface along the axial direction is circular, the plurality of weakening grooves respectively extend radially in a radial direction through the center of the circle and are uniformly dispersed along the circumferential direction, and wherein the cross-sectional shape of a single weakening groove is V-shaped, and wherein the depth of the weakening groove decreases in the radial outward direction of the center of the second convex surface.

5. The membrane arched cabin device according to claim 4, wherein A weakening blind hole is further arranged at the top center of the second convex surface.

6. The membrane arched cabin device according to claim 4, wherein A plurality of air holes are arranged on the arched support; Wherein the flow passage cross-sectional shape of a single air hole is a sector, and the plurality of air holes are arranged in a radial, multi-layer nested manner; and wherein in the axial side projection, the plurality of weakening grooves do not overlap with the plurality of air holes in the outer layer; And wherein the plurality of air holes are configured such that the air passage area of the support accounts for more than 45% of the total cross-sectional area of the support.

7. The membrane arched cabin device according to claim 2, wherein The arched support further has a first welding butt surface formed around the first convex surface; The arched membrane has a second welding butt surface formed around the second concave surface; The arched membrane is welded to the first welding butt surface at the second welding butt surface.

8. The membrane arched cabin device according to claim 7, wherein The thickness of the arched support increases in the radial outward direction of the top center; and / or The second concave surface and the second welding butt surface are smoothly transitioned; and / or The arched support further has a radial side surface between the ring-shaped plane and the first welding butt surface, wherein a sealing groove is arranged on the radial side surface of the arched support.

9. The membrane arched cabin device according to claim 1, wherein The material of the arch-shaped support is aluminum alloy LY12; The material of the arch-shaped diaphragm is aluminum alloy LY12; The material of the heat-proof structure is rubber material or aerogel material.

10. An engine characterized by, The engine comprises: The arch-shaped diaphragm device according to any one of claims 1-9; A first pulse shell is provided with a first step; and A second pulse shell is provided with a second step; The arch-shaped diaphragm device is clamped between the first step and the second step in the axial direction.

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