Shape memory alloy diaphragm type compartment device and engine

Abstract

The utility model provides a shape memory alloy diaphragm type compartment device. The shape memory alloy diaphragm type compartment device comprises a supporting piece, a shape memory alloy diaphragm and a heat-proof layer, wherein the shape memory alloy diaphragm is installed on the supporting piece, and a heat-proof layer is arranged on the surface of the side, away from the supporting piece, of the shape memory alloy diaphragm; and the shape memory alloy diaphragm is a circular diaphragm formed by splicing a plurality of fan-shaped shape memory alloy single sheets. The utility model further provides an engine. The shape memory alloy diaphragm type compartment device is simple in structure, light in weight, high in forward pressure bearing intensity, capable of being opened in the reverse direction, reliable in sealing, good in heat insulation performance and capable of reliably achieving the intermittent working function of a solid engine.

Description

TECHNICAL FIELD

[0001] The utility model relates to solid rocket engine technical field, specifically, it relates to a shape memory alloy diaphragm type cabin separation device and engine. BACKGROUND

[0002] Solid pulse engine is actually divided into multiple parts by the combustion chamber of solid engine with isolation device, and can be shut down and started multiple times. The aircraft uses solid pulse engine as power device, and can reasonably distribute the pulse thrust and pulse interval time of each stage through the control program on the aircraft, so as to realize the optimal control of flight orbit and the optimal management of engine energy, thereby comprehensively improving the performance of various aircrafts.

[0003] The isolation device is an important component of the solid pulse engine. When the previous pulse works, the isolation device completely isolates the adjacent two-stage pulse combustion chamber. The isolation device plays a role of heat insulation, sealing and force bearing, and ensures that the main charge of the next pulse combustion chamber is not ignited. When the next pulse works, the isolation device opens smoothly and does not produce harmful debris, thereby effectively realizing the function of intermittent work of the engine pulse.

[0004] The isolation device is divided into cabin separation type and layer separation type. Due to the harsh and special working conditions of the cabin separation device, various performance requirements are high. The cabin separation device not only needs to withstand the high pressure of the previous pulse in the positive direction, but also needs to ensure that it can be opened reliably in the reverse direction. At the same time, no debris can fly out when it is opened, so as to avoid affecting the safety of the engine. In addition, the structure needs to be light in quality, the heat insulation effect needs to be good, and the sealing needs to be reliable. Therefore, a cabin separation device with the above characteristics must be developed to realize the function of intermittent work of the pulse and meet the urgent needs of various aircrafts. CONTENT OF THE UTILITY MODEL

[0005] In the first aspect of the utility model, a shape memory alloy diaphragm type cabin separation device is provided, which comprises a support, a shape memory alloy diaphragm and a heatproof layer.

[0006] The shape memory alloy diaphragm is installed on the support, and the side surface of the shape memory alloy diaphragm away from the support is provided with a heatproof layer. The shape memory alloy diaphragm is a circular diaphragm formed by splicing a plurality of fan-shaped shape memory alloy single pieces.

[0007] Optionally, the shape memory alloy single piece comprises a fan-shaped body portion, wherein a first lap joint portion is formed at the circumferential one side edge of the fan-shaped body portion, a second lap joint portion matched with the first lap joint portion is formed at the circumferential other side edge of the fan-shaped body portion, and the first lap joint portion of one shape memory alloy single piece is matched with the second lap joint portion of another shape memory alloy single piece to realize the splicing between the adjacent two shape memory alloy single pieces.

[0008] Optionally, the upper surface of the first lap joint is lower than the upper surface of the fan-shaped body portion, forming an upward-facing outer concave step shoulder; the lower surface of the second lap joint is higher than the lower surface of the fan-shaped body portion, forming a downward-facing inner concave step shoulder; the outer concave step shoulder of one shape memory alloy sheet is lap-jointed with the inner concave step shoulder of the other shape memory alloy sheet to realize the splicing between the two adjacent shape memory alloy sheets.

[0009] Optionally, the shape memory alloy sheet further comprises an extension portion, the arc-shaped edge of the fan-shaped body portion extends downward to form the extension portion, and the extension portion and the fan-shaped body portion constitute an inner concave structure.

[0010] The side of the support adjacent to the shape memory alloy diaphragm is formed with an outer convex structure matched with the inner concave structure.

[0011] Optionally, the radially outer side of the support adjacent to the outer convex structure is further formed with a stepped notch groove, and a first sealing member is arranged between the extension portion and the stepped notch groove, so as to form a seal between the shape memory alloy diaphragm and the support.

[0012] Optionally, the shape memory alloy diaphragm type partition device further comprises a fixing ring and a fastener; wherein the shape memory alloy diaphragm is installed on the support through the fixing ring and the fastener.

[0013] Optionally, the radial side of the support is provided with a first mounting hole in the radial direction;

[0014] The fixing ring comprises a first ring portion parallel to the side surface of the shape memory alloy diaphragm away from the support, and a second ring portion extending from the first ring portion toward the side of the support, and the second ring portion is provided with a second mounting hole in the radial direction;

[0015] The fastener passes through the second mounting hole and the first mounting hole.

[0016] Optionally, the support is provided with a plurality of ventilation holes,

[0017] wherein the flow passage cross-sectional shape of a single ventilation hole is fan-shaped, and the plurality of ventilation holes are arranged in a radial and multi-layer nested manner;

[0018] and wherein the plurality of ventilation holes are configured such that the ventilation area of the support accounts for more than 45% of the total cross-sectional area of the support.

[0019] Optionally, the material of the support is aluminum alloy LY12;

[0020] The material of the shape memory alloy diaphragm is nickel-titanium alloy;

[0021] The heat-proof layer is a rubber material layer or an aerogel material layer;

[0022] The material of the fixed ring is aluminum alloy LY12.

[0023] The material of the fastener is 30CrMnSiA steel.

[0024] In the second aspect of the utility model, an engine is provided, and the engine comprises:

[0025] The aforementioned shape memory alloy diaphragm type cabin device;

[0026] A first pulse shell is provided with a first step; and

[0027] A second pulse shell is provided with a second step.

[0028] The shape memory alloy diaphragm type cabin device is clamped between the first step and the second step in the axial direction.

[0029] The shape memory alloy diaphragm type cabin device of the utility model is provided with a support, a shape memory alloy diaphragm and a heatproof layer, the shape memory alloy diaphragm is installed on the support, and the side surface of the shape memory alloy diaphragm away from the support is provided with the heatproof layer, the shape memory alloy diaphragm is a circular diaphragm formed by splicing a plurality of fan-shaped shape memory alloy single diaphragms, the cabin device has simple structure, light weight, high positive pressure bearing pressure, can be opened in reverse direction, reliable sealing and good heat insulation performance, and can reliably realize the intermittent working function of the solid engine.

[0030] The engine of the utility model can effectively realize the energy management of the solid engine and adapt to higher adaptability requirements by using the shape memory alloy diaphragm type cabin device.

[0031] The above and other objects, advantages and features of the utility model will be more apparent from the following detailed description of the specific embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0032] The features, advantages and example embodiments of the utility model will be described below with reference to the accompanying drawings, in which the same reference signs indicate the same elements, and wherein:

[0033] Figure 1 is a structural schematic view of the shape memory alloy diaphragm type cabin device of the utility model embodiment, wherein, Figure 1 (a) is a sectional view, Figure 1 (b) is a view when viewed from C, Figure 1 (c) is a view when viewed from B.

[0034] Figure 2 is Figure 1 a partial enlarged view of (a).

[0035] Figure 3 is Figure 1 a partial structural schematic view of an engine with the shape memory alloy diaphragm compartment device shown.

[0036] Figure 4 is Figure 1 a structural schematic view of a shape memory alloy diaphragm of the shape memory alloy diaphragm compartment device shown, wherein, Figure 4 (a) is a schematic view of two shape memory alloy diaphragms after splicing, Figure 4 (b) is a side view of a single shape memory alloy diaphragm, Figure 4 (c) is a top view of a single shape memory alloy diaphragm, Figure 4 (d) is another side view of a single shape memory alloy diaphragm.

[0037] Figure 5 is Figure 1 a structural schematic view of a support of the shape memory alloy diaphragm compartment device shown, wherein, Figure 5 (a) is a view observed from a side of the support away from the shape memory alloy diaphragm, Figure 5 (b) is a sectional view along Figure 5 the line D-D in (a).

[0038] In the drawings, reference numerals are as follows:

[0039] 8 - shape memory alloy diaphragm compartment device, 1 - support, 11 - stepped notch groove, 13 - first mounting hole, 14 - vent hole, 15 - sealing groove, 16 - outer convex structure, 17 - stepped side, 2 - shape memory alloy diaphragm, 20 - shape memory alloy diaphragm, 21 - fan-shaped body part, 22 - first lap joint, 23 - second lap joint, 24 - extension part, 3 - heatproof layer, 4 - fastener, 5 - first sealing member, 6 - fixing ring, 61 - first ring part, 62 - second ring part, 63 - second mounting hole, 7 - first pulse shell, 71 - first step, 10 - second pulse shell, 101 - second step, 9 - second sealing member, 31 - first pulse combustion chamber, 32 - second pulse combustion chamber. DETAILED DESCRIPTION

[0040] The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. The description of the exemplary embodiments is merely exemplary, and is not intended to limit the present application and its applications or uses. Moreover, the dimensions and proportions of the various components in the drawings are merely schematic, and do not strictly correspond to actual products.

[0041] This utility model embodiment provides a shape memory alloy diaphragm-type compartment device 8, such as... Figure 1 As shown, the shape memory alloy diaphragm-type compartment device 8 includes: a support member 1, a shape memory alloy diaphragm 2, and a heat-insulating layer 3; wherein, the shape memory alloy diaphragm 2 is mounted on the support member 1, and the heat-insulating layer 3 is provided on the surface of the shape memory alloy diaphragm 2 away from the support member 1; and wherein, as... Figure 4 As shown, the shape memory alloy diaphragm 2 is a circular diaphragm formed by splicing together multiple fan-shaped shape memory alloy single sheets 20.

[0042] The shape memory alloy diaphragm-type compartment device 8 of this utility model is configured to include a support member 1, a shape memory alloy diaphragm 2, and a heat-insulating layer 3. The shape memory alloy diaphragm 2 is mounted on the support member 1, and the heat-insulating layer 3 is provided on the side of the shape memory alloy diaphragm 2 away from the support member 1. The shape memory alloy diaphragm 2 is a circular diaphragm formed by splicing together multiple fan-shaped shape memory alloy single sheets 20. This makes the compartment device 8 simple in structure, light in weight, high in positive pressure resistance, able to open in reverse, reliable in sealing, and good insulation performance, and can reliably realize the function of intermittent operation of solid rocket motor.

[0043] This utility model also provides an engine, such as Figure 3 As shown, the engine (not labeled in the figure) includes: the aforementioned shape memory alloy diaphragm-type compartment device 8, a first pulse housing 7, and a second pulse housing 10; a first step 71 is provided on the first pulse housing 7, and a second step 101 is provided on the second pulse housing 10; wherein, the shape memory alloy diaphragm-type compartment device 8 is sandwiched between the first step 71 and the second step 101 in the axial direction. The engine of this embodiment of the invention, by using the shape memory alloy diaphragm-type compartment device 8, can effectively achieve 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.

[0044] The shape memory alloy diaphragm compartment device 8 and the composition of the engine, etc., of this utility model embodiment will be described in more detail below with reference to the accompanying drawings.

[0045] like Figure 4 As shown, in some embodiments, the shape memory alloy monolith 20 includes a fan-shaped body portion 21, wherein a first overlapping portion 22 is formed at one circumferential edge of the fan-shaped body portion 21, and a second overlapping portion 23 adapted to the first overlapping portion 22 is formed at the other circumferential edge of the fan-shaped body portion 21. The first overlapping portion 22 of one shape memory alloy monolith 20 is adapted to the second overlapping portion 23 of another shape memory alloy monolith 20 to realize the splicing between two adjacent shape memory alloy monoliths 20.

[0046] Figure 4 (a) is a schematic view of two shape memory alloy segments 20 after assembly, Figure 4 (b) is a side view of a single shape memory alloy segment 20, Figure 4 (c) is a top view of a single shape memory alloy segment 20, Figure 4 (d) is another side view of a single shape memory alloy segment 20. In some embodiments, the upper surface of the first lap joint 22 is lower than the upper surface of the sector body portion 21, forming an outwardly concave stepped shoulder facing upward; the lower surface of the second lap joint 23 is higher than the lower surface of the sector body portion 21, forming an inwardly concave stepped shoulder facing downward; the outwardly concave stepped shoulder of one shape memory alloy segment 20 is lap jointed with the inwardly concave stepped shoulder of another shape memory alloy segment 20, to achieve the assembly between two adjacent shape memory alloy segments 20. In order to ensure that the shape memory alloy diaphragm bulkhead device 8 can withstand the high pressure of the first pulse, the thickness of the shape memory alloy segment 20 needs to be ensured, and at the same time the shape memory alloy diaphragm bulkhead device 8 needs to be able to recover deformation under the action of gas and internal pressure deformation when working at the second pulse, and ensure that it can be smoothly opened and no debris is generated, so as to ensure both the positive pressure bearing capacity of the bulkhead and the opening of the bulkhead. The embodiments of the utility model are provided with the first lap joint 22 and the second lap joint 23 of the outwardly concave stepped shoulder and the inwardly concave stepped shoulder on the circumferential two sides of the sector body portion 21.

[0047] Typically, the shape memory alloy diaphragm 2 is a circular diaphragm formed by assembling 8 sector-shaped shape memory alloy segments 20, and the first lap joint 22 and the second lap joint 23 of every two shape memory alloy segments 20 are lap jointed. After the first lap joint 22 and the second lap joint 23 are lap jointed, silicon rubber can be coated on the lap jointed matching part, so as to form a seal. Alternatively, the shape memory alloy diaphragm 2 can include other numbers of sector-shaped shape memory alloy segments 20, for example, the shape memory alloy diaphragm 2 can be a circular diaphragm formed by assembling 4, 6, 10 or 12 sector-shaped shape memory alloy segments 20.

[0048] It should be understood that the "upper surface" and the "lower surface" of the shape memory alloy segment 20 are described with reference to the support 1, and the "upper surface" of the shape memory alloy segment 20 can also be described as the surface of the shape memory alloy segment 20 away from the support 1, and the "lower surface" of the shape memory alloy segment 20 can be described as the surface of the shape memory alloy segment 20 close to the support 1. Figure 1 In some embodiments, the first lap joint 22 and the second lap joint 23 are formed by laser welding, and the first lap joint 22 and the second lap joint 23 are formed by laser welding.

[0049] Figure 2 , Figure 4 and Figure 5 ​As shown, the shape memory alloy sheet 20 also comprises an extension portion 24, the arc-shaped edge of the fan-shaped body portion 21 extends downward to form the extension portion 24, and the extension portion 24 and the fan-shaped body portion 21 constitute an inner concave structure; the side of the support 1 adjacent to the shape memory alloy sheet 2 forms an outer convex structure 16 matched with the inner concave structure. As shown in Figure 5 As shown, the support 1 is a generally cylindrical flat structure with a hollow structure. One side of the support 1 is a generally planar structure slightly convex toward the side away from the shape memory alloy sheet 2, and the other side is an outer convex structure 16 with a local convex center, so that the carrying capacity of the support 1 can be improved, and the structure of the support 1 can be ensured not to be damaged when bearing the first pulse high pressure.

[0050] Referring to Figure 2 and Figure 5 , the radially outer side of the support 1 also forms a stepped notch groove 11 adjacent to the outer convex structure 16. When the shape memory alloy sheet 2 is installed on the support 1, the stepped notch groove 11 is located below the extension portion 24 (see Figure 2 ), and a first sealing member 5 is arranged between the extension portion 24 and the stepped notch groove 11, so as to form a seal between the shape memory alloy sheet 2 and the support 1. The first sealing member 5 can be a sealing ring or a sealing gasket. By arranging the outer convex structure 16 and the stepped notch groove 11, the smooth assembly of the shape memory alloy sheet 2 and the support 1 can be ensured, and the isolation of the two-stage pulse combustion chamber can be achieved.

[0051] In addition, as shown in Figure 5 , the radially outer side of the support 1 can also be provided with a sealing groove 15. Generally, the radially outer side of the part of the support 1 which does not constitute the outer convex structure 16 is provided with the sealing groove 15. When the shape memory alloy sheet type cabin isolation device 8 is installed in the engine, the radially outer side of the part of the support 1 which does not constitute the outer convex structure 16 is attached to the second pulse shell 10, and a second sealing member 9 is arranged in the sealing groove 15, as shown in Figure 3 , so as to ensure the assembly and sealing between the support 1 and the pulse shell and achieve the isolation of the two-stage pulse. The second sealing member 9 can be a sealing ring or a sealing gasket.

[0052] As shown in Figure 1 and Figure 5 , in the shape memory alloy sheet type cabin isolation device 8 of the embodiment of the utility model, a plurality of air holes 14 are also arranged on the support 1. The flow passage cross section shape of a single air hole 14 is fan-shaped, and the plurality of air holes 14 are arranged in a radial and multi-layer nested manner.

[0053] Figure 1 (b) is from Figure 1The view of C in (a) can be seen that the support 1 is provided with multiple layers of vent holes 14 from inside to outside in the radial direction, wherein the first layer is provided with 4 vent holes 14, the second layer is provided with 16 vent holes 14, the third layer is provided with 16 vent holes 14, and the single vent area of the vent holes 14 of the third layer is greater than that of the second layer. The flow passage cross-sectional shape of each vent hole 14 is a sector shape.

[0054] In the axial side projection, the part where the two adjacent shape memory alloy single pieces 20 overlap each other does not overlap the multiple vent holes 14 in the outer layer. As shown in Figure 5 The part where the two adjacent shape memory alloy single pieces 20 overlap each other does not overlap the multiple vent holes 14 in the second layer and the third layer. The vent holes in the inner layer, which are the vent holes in the first layer in Figure 5 , are small in size, and structural damage can be avoided when the shape memory alloy diaphragm 2 bears the first pulse high pressure by adjusting the thickness of the shape memory alloy diaphragm 2. The vent holes 14 in the outer layer are large in size, and structural damage of the shape memory alloy diaphragm 2 can be avoided when the shape memory alloy diaphragm 2 bears the first pulse high pressure by not processing the vent holes 14 in the part of the outer layer region of the support 1 corresponding to the part where the two adjacent shape memory alloy single pieces 20 overlap each other, that is, in the form of a reinforcing rib.

[0055] In some embodiments, the multiple vent holes 14 are configured such that the vent area of the support 1 accounts for more than 45% of the total cross-sectional area of the support 1. In this way, the second pulse gas of the pulse engine can smoothly pass through the shape memory alloy diaphragm type cabin device 8. The vent area of the support 1 accounts for, for example, 46%, 48%, 50% of the total cross-sectional area of the support 1.

[0056] In some embodiments, in the shape memory alloy diaphragm type cabin device 8 of the embodiments of the present application, the heat protection layer 3 is bonded to the side surface of the shape memory alloy diaphragm 2 away from the support 1. By bonding the heat protection layer 3 to the shape memory alloy diaphragm 2, fast and stable connection of the heat protection layer 3 to the shape memory alloy diaphragm 2 can be achieved.

[0057] In some embodiments, the shape memory alloy diaphragm type cabin device 8 of the embodiments of the present application further comprises a fixing ring 6 and a fastener 4; wherein the shape memory alloy diaphragm 2 is installed on the support 1 through the fixing ring 6 and the fastener 4. Referring to Figure 2The radial side of the support 1 is further provided with a first mounting hole 13 in the radial direction; the fixing ring 6 comprises a first ring part 61 parallel to the side surface of the shape memory alloy diaphragm 2 away from the support 1, and a second ring part 62 extending from the first ring part 61 towards the side of the support 1, and the second ring part 62 is provided with a second mounting hole 63 in the radial direction; the fastener 4 passes through the second mounting hole 63 and the first mounting hole 13. The mounting hole can be a threaded hole, and the fastener 4 can be a pin. As shown in Figure 5 As shown in (b), generally, the radial side of the support 1 is provided with a first mounting hole 13 with a diameter of 3 mm, and there are 12 first mounting holes 13 arranged uniformly in the circumferential direction. Alternatively, the number of the first mounting holes 13 can be 4, 6, 8, 10, 14, etc. In this way, through the mounting of the fixing ring 6 and the support 1, the positioning of the support 1 and the shape memory alloy diaphragm 2 with the heat-proof layer 3 is finally achieved.

[0058] The shape memory alloy diaphragm type cabin separation device 8 in the embodiment of the utility model is designed in a split structure form, the shape memory alloy diaphragm 2 with the heat-proof layer 3 is fixed on the support 1 through the fixing ring 6 and the fastener 4, and the two are sealed through the first sealing element 5, forming a whole structure. When the first pulse works, the support 1 provides bearing, and at the same time, the heat-proof layer 3 prevents heat for the whole structure of the shape memory alloy diaphragm 2, avoiding that the structure opens ahead of time due to heat and fails, realizing the complete isolation of the front and rear pulses; when the second pulse works, the gas acts on the shape memory alloy diaphragm 2 through the support 1, and the shape memory alloy diaphragm 2 immediately restores deformation, so that the cabin separation opens, and no fragments are generated. Through the split structure design, the forming difficulty is reduced, the product reliability is improved, and the normal realization of the function of the shape memory alloy diaphragm type cabin separation device 8 is ensured.

[0059] The material, size, preparation process, etc. of each component of the shape memory alloy diaphragm type cabin separation device 8 are exemplarily described below.

[0060] The material of the support 1 and the fixing ring 6 can be aluminum alloy material LY12, etc., and is formed through machining. The aluminum alloy LY12 material has low density, high strength and good processability, and can effectively reduce the negative quality of the component.

[0061] The material of the fastener 4 can be 30CrMnSiA steel, etc., and is formed through machining. The material has high strength, good processability and meets the strength use requirement.

[0062] The shape memory alloy diaphragm 2 can be made of nickel-titanium alloy, such as a 50% nickel-based titanium alloy γ-phase reinforced shape memory alloy material with a tensile strength of 700MPa-900MPa and a recovery temperature controlled at 70℃-100℃. It is formed through processes such as base material blank casting, vacuum remelting-precision casting, forging, and rolling. When the temperature rises above 70℃, the shape memory alloy diaphragm 2 deforms and opens from the splicing area, achieving a better performance without harmful effluent and effectively meeting structural and functional requirements. Shape memory alloy materials have high strength, mature forming processes, and can recover their deformation after heating. Through the load-bearing, sealing, and heat-insulating properties of the sheet-like shape memory alloy diaphragm and its surface heat-insulating layer 3, isolation of adjacent pulse combustion chambers is achieved. During the second pulse operation, the shape memory alloy material rapidly heats up and undergoes recovery deformation, allowing the shape memory alloy diaphragm structure to open, meeting the dual structural and functional requirements of the pulse engine.

[0063] The heat-insulating layer 3 can be a rubber material layer or an aerogel material layer, formed by an independent atmospheric pressure drying mold. It is then bonded to the shape memory alloy diaphragm 2. The material of this heat-insulating layer 3 has excellent thermal insulation properties and a low density, which further reduces negative mass and ensures that the propellant loading and ignition of the second pulse are not ignited during the first pulse operation, preventing structural damage to the shape memory alloy diaphragm-type compartment device 8 due to thermal runaway. Preferably, the heat-insulating layer 3 is an aerogel material layer with a density of 0.3 g / cm³. 3 It has a thermal conductivity of 0.025 W / m·K, a specific heat capacity of 1.4 J / g·K, stable performance, convenient preparation, and good economic efficiency.

[0064] The first seal 5 and the second seal 9 can be obtained by compression molding.

[0065] like Figure 3 As shown, it has Figure 1 The diagram shows a partial structural representation of the shape memory alloy diaphragm-type compartment device 8 in the engine. The shape memory alloy diaphragm-type compartment device 8 is installed in the pulse engine (…). Figure 3The shape memory alloy diaphragm partition device 8 is placed in the middle of the first pulse shell 7 and the second pulse shell 10, that is, the axial side of the shape memory alloy diaphragm partition device 8 with the heatproof layer 3 is next to the first pulse combustion chamber 31 of the first pulse, and the other axial side of the shape memory alloy diaphragm partition device 8 is next to the second pulse combustion chamber 32 of the second pulse. The radial side of the shape memory alloy diaphragm partition device 8 is sealed between the first pulse combustion chamber 31 and the second pulse combustion chamber 32 by placing the second seal 9 at the sealing groove 15 of the support 1 of the shape memory alloy diaphragm partition device 8. In addition, the first pulse shell 7 is provided with a first step 71, and the second pulse shell 10 is provided with a second step 101, the first step 71 and the second step 101 are oppositely arranged in the axial direction, and the shape memory alloy diaphragm partition device 8 is clamped between the first step 71 and the second step 101. That is, the shape memory alloy diaphragm partition device 8 is axially limited by the first step 71 on the first pulse shell 7 and the second step 101 on the second pulse shell 10 in the axial direction, wherein the first step 71 is used to prevent the shape memory alloy diaphragm partition device 8 from moving to the direction of the first pulse combustion chamber 31 when the second pulse works, and the second step 101 is used to prevent the shape memory alloy diaphragm partition device 8 from moving to the direction of the second pulse combustion chamber 32 when the first pulse works, so as to realize the complete positioning of the shape memory alloy diaphragm partition device 8 and the isolation between the first pulse combustion chamber 31 and the second pulse combustion chamber 32.

[0066] The assembly process of the shape memory alloy diaphragm partition device 8 is described below, and the specific steps are as follows:

[0067] First, check the integrity of the first seal 5, and place the first seal 5 at the step gap groove 11 of the support 1.

[0068] Second, the fan-shaped shape memory alloy single piece 20 is sequentially installed on one side of the outer convex structure 16 of the support 1 along the center to splice the shape memory alloy diaphragm 2 as a whole, wherein the extension part 24 of the shape memory alloy single piece 20 is matched and assembled with the ring groove on the outer side of the outer convex structure 16 of the support 1. When the two shape memory alloy single pieces 20 are spliced, a proper amount of silicone rubber is coated at the splicing part for sealing.

[0069] Third, the heatproof layer 3 is bonded on the side of the shape memory alloy diaphragm 2 away from the support 1 by coating adhesive. If necessary, a tool can be used for pressing during the bonding process.

[0070] Fourthly, the fixing ring 6 is sleeved on the outer cylindrical surface of the shape memory alloy diaphragm 2 and the support 1 in the axial direction of the support 1, wherein the fixing ring 6 is considered to be assembled in place when the end surface of the fixing ring 6 is in contact with the stepped side surface 17 of the support 1.

[0071] Fifthly, if necessary, the fixing ring 6 is rotated in the circumferential direction to adjust the circumferential position of the fixing ring 6. After the second mounting hole 63 of the side surface of the fixing ring 6 is aligned with the center of the first mounting hole 13 of the support 1, the fasteners 4 are mounted one by one in the circumferential direction from the side surface until all the fasteners 4 are mounted in place.

[0072] Thus far, the assembly of the shape memory alloy diaphragm type cabin partition device 8 is completed.

[0073] The shape memory alloy diaphragm type cabin partition device 8 of the embodiment of the present application is designed in a split combination of the support 1, the shape memory alloy diaphragm 2 and the heatproof layer 3, which realizes the requirements that the cabin partition device 8 satisfies the high positive pressure bearing pressure, can be opened in the reverse direction and has no debris flying out, and at the same time, has good heat insulation effect and reliable sealing, and successfully realizes the intermittent working function of the solid rocket engine.

[0074] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "one example", "some examples" or "preferred embodiment" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

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

Claims

1. A shape memory alloy diaphragm partitioning device, characterized in that, The shape memory alloy diaphragm type cabin device comprises a support, a shape memory alloy diaphragm, and a heatproof layer. The shape memory alloy diaphragm is installed on the support, and a side surface of the shape memory alloy diaphragm away from the support is provided with the heatproof layer; and the shape memory alloy diaphragm is a circular diaphragm formed by splicing a plurality of fan-shaped shape memory alloy single pieces.

2. The shape memory alloy diaphragm type cabin device according to claim 1, wherein the shape memory alloy single piece comprises a fan-shaped body portion, a first lap joint portion is formed at a circumferential one side edge of the fan-shaped body portion, a second lap joint portion matched with the first lap joint portion is formed at a circumferential other side edge of the fan-shaped body portion, and the first lap joint portion of one shape memory alloy single piece is matched with the second lap joint portion of another shape memory alloy single piece to realize splicing between the two adjacent shape memory alloy single pieces.

3. The shape memory alloy diaphragm type cabin device according to claim 2, wherein an upper surface of the first lap joint portion is lower than an upper surface of the fan-shaped body portion to form an outwardly concave stepped shoulder facing upward, a lower surface of the second lap joint portion is higher than a lower surface of the fan-shaped body portion to form an inwardly concave stepped shoulder facing downward, and the outwardly concave stepped shoulder of one shape memory alloy single piece is matched with the inwardly concave stepped shoulder of another shape memory alloy single piece to realize splicing between the two adjacent shape memory alloy single pieces.

4. The shape memory alloy diaphragm type cabin device according to claim 3, wherein the shape memory alloy single piece further comprises an extension portion, an arc-shaped edge of the fan-shaped body portion extends downward to form the extension portion, and the extension portion and the fan-shaped body portion constitute an inwardly concave structure; and a side of the support adjacent to the shape memory alloy diaphragm is provided with an outwardly convex structure matched with the inwardly concave structure.

5. The shape memory alloy diaphragm type cabin device according to claim 4, wherein a radial outer side surface of the support adjacent to the outwardly convex structure is further provided with a stepped notch groove, and a first sealing member is arranged between the extension portion and the stepped notch groove to form a seal between the shape memory alloy diaphragm and the support.

6. The shape memory alloy diaphragm type cabin device according to claim 1, further comprising a fixing ring and a fastener, wherein the shape memory alloy diaphragm is installed on the support through the fixing ring and the fastener.

7. The shape memory alloy diaphragm type cabin device according to claim 6, wherein a radial side surface of the support is provided with a first mounting hole in a radial direction; the fixing ring comprises a first ring portion parallel to a side surface of the shape memory alloy diaphragm away from the support, and a second ring portion extending from the first ring portion toward a side of the support, and the second ring portion is provided with a second mounting hole in the radial direction. ​ ​ ​ ​ ​ ​ ​ ​ The fastener passes through the second mounting hole and the first mounting hole. 8.The shape memory alloy diaphragm compartment device according to claim 1, characterized in that, a plurality of air holes are arranged on the support, wherein the flow passage cross-sectional shape of each of the air holes is a sector, and the air holes are arranged in a radial and multi-layer nested manner; 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. 9.The shape memory alloy diaphragm compartment device according to claim 6, characterized in that, the material of the support is aluminum alloy LY12; the material of the shape memory alloy diaphragm is nickel-titanium alloy; the heat-proof layer is a layer of rubber material or aerogel material; the material of the fixing ring is aluminum alloy LY12; the material of the fastener is 30CrMnSiA steel.

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

Images