Spraying pipe connecting structure, engine and rocket

Abstract

The invention relates to the technical field of rockets, in particular to a spray pipe connecting structure, an engine and a rocket. The spray pipe connecting structure comprises a first connecting piece, one end of the first connecting piece is inserted into a first through hole and is movably arranged in the axial direction of the first through hole, and the other end of the first connecting piece can limit the depth of the first connecting piece inserted into the first through hole by being provided with a first limiting piece; one end of the second connecting piece is connected with one end of the first connecting piece and elastically connected with the inner wall face of the first through hole through a first elastic piece, the other end of the second connecting piece is provided with a second limiting piece, and the second limiting piece is elastically connected with the outer wall face of the second connecting piece through a second elastic piece. The spray pipe connecting structure, the engine and the rocket have the advantages that the structure is simple, operation is convenient, tolerance does not need to be considered, the connecting reliability is high, and the assembling, disassembling and overhauling efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of rocket technology, and in particular to a nozzle connection structure, an engine and a rocket. Background Art

[0002] For rocket skid-assisted solid rocket engines, since the engine is fixed and tied to the frame for track running tests, high-frequency vibrations will be generated during the movement of the frame. High-frequency vibrations will cause the connection structure between the engine and the frame to be subjected to high-frequency and small-amplitude impacts, and in severe cases, the connection structure and the engine will be disintegrated and damaged. In order to ensure that the solid rocket engine does not disintegrate during the track running process, it is necessary to analyze and improve the connection structure and form of the engine components to improve the connection strength and applicability.

[0003] However, the existing connection structure between the nozzle and the combustion chamber has the problems of complex structure, low assembly efficiency, low connection reliability and difficult disassembly. Summary of the invention

[0004] The present invention provides a nozzle connection structure, an engine and a rocket, which are used to solve the defects of the connection structure between the nozzle and the combustion chamber in the prior art, such as complex structure, low assembly efficiency, low connection reliability and difficult disassembly.

[0005] The present invention provides a nozzle connection structure, wherein the nozzle housing is provided with a first through hole, the combustion chamber housing is provided with a second through hole, the first through hole is opposite to and connected with the second through hole; The nozzle connection structure comprises: a first connecting member, one end of which is inserted into the first through hole and movably arranged along the axial direction of the first through hole, and the other end of which can be configured with a first limiting member to limit the depth of the first connecting member inserted into the first through hole; A second connecting member, one end of the second connecting member is connected to one end of the first connecting member, and is elastically connected to the inner wall surface of the first through hole through a first elastic member, and the other end of the second connecting member is provided with a second limiting member, and the second limiting member is elastically connected to the outer wall surface of the second connecting member through a second elastic member.

[0006] According to the nozzle connection structure provided by the present invention, when the first limiting member is configured, the first elastic member and the second elastic member are both in a compressed state, the second limiting member is pressed against the outer wall surface of the second connecting member, and the first connecting member and the second connecting member are both moved into the first through hole; when the first limiting member is not configured, the first elastic member and the second elastic member are both in an extended state, the other end of the second connecting member extends out of the second through hole, and the second limiting member is unfolded and supported on the outer wall surface of the combustion chamber shell.

[0007] According to the nozzle connection structure provided by the present invention, a limiting groove is formed on the outer wall of the combustion chamber shell and located on the outside of the second through hole, and the limiting groove is connected to the second through hole. The second limiting member is inserted into and limited in the limiting groove in the expanded state to radially position and stop the second connecting member.

[0008] According to the nozzle connection structure provided by the present invention, the limiting groove includes: a first strip hole, an arc hole and a second strip hole connected in sequence, the first strip hole and the second strip hole are both arranged along the radial direction of the second through hole, and the second strip hole is located on the radial outside of the first strip hole, and the arc hole is arranged along the circumferential direction of the second through hole; wherein, when the second limiting member is gradually expanded, inserted into the first strip hole, the second connecting member is rotated, and the second limiting member is driven to be inserted into and move along the arc hole until it moves and is inserted into the second strip hole, and the second limiting member is limited in the second strip hole.

[0009] According to the nozzle connection structure provided by the present invention, a plurality of the limiting grooves and the second limiting members are provided, the limiting grooves are evenly spaced around the center of the second through hole, and the second limiting members are evenly spaced around the center of the second connecting member.

[0010] According to the nozzle connection structure provided by the present invention, the second connection member is sleeved on the outside of the first connection member, and the second connection member is connected to the first connection member in an adjustable position.

[0011] According to the nozzle connection structure provided by the present invention, the second connection member is formed with a threaded hole having an internal thread, the first connection member is formed with an external thread, and the first connection member is inserted into the threaded hole in an adjustable position through a threaded connection.

[0012] According to the nozzle connection structure provided by the present invention, a necking hole for one end of the first connecting member to pass through is formed at one end of the first through hole away from the second through hole, a first boss is formed at the other end of the first connecting member, and a second boss is formed at the other end of the second connecting member, and the outer diameter of the first boss is larger than the inner diameter of the necking hole, and the outer diameter of the second boss is smaller than or equal to the inner diameter of the second through hole and larger than the inner diameter of the necking hole.

[0013] The present invention provides an engine, comprising: the nozzle connection structure provided by the present invention.

[0014] The present invention provides a rocket, comprising: the nozzle connection structure or the engine provided by the present invention.

[0015] The present invention provides a nozzle connection structure. The nozzle housing is provided with a first through hole, and the combustion chamber housing is provided with a second through hole. The first through hole is opposite to and connected to the second through hole. The first through hole and the second through hole are used to install the nozzle connection structure of the present invention. The nozzle connection structure of the present invention includes: a first connecting member and a second connecting member; one end of the first connecting member is inserted into the first through hole and is movably arranged along the axial direction of the first through hole, and the other end of the first connecting member can limit the depth of the first connecting member inserted into the first through hole by configuring a first limiting member; one end of the second connecting member is connected to one end of the first connecting member, and is elastically connected to the inner wall surface of the first through hole through a first elastic member, and the other end of the second connecting member is provided with a second limiting member, and the second limiting member is elastically connected to the outer wall surface of the second connecting member through a second elastic member.

[0016] The present invention has the following advantages: the combustion chamber and the nozzle can be assembled or disassembled by only applying external force to the second limit member and the first connecting member so that the first connecting member and the second connecting member move in the first through hole and the second through hole, and the structure is simple and the operation is convenient; the elastic force of the first elastic member on the first connecting member and the second connecting member replaces the existing threaded fixed connection, and there is no need to consider tolerance, and it has a reset function during high-frequency vibration, which reduces the risk of disintegration caused by thread failure and damage, and the connection reliability is high; moreover, after the nozzle is disassembled, the nozzle connection structure can be left on the nozzle shell without removal, thereby improving the assembly and disassembly and maintenance efficiency.

[0017] Furthermore, the present invention provides an engine, which includes the nozzle connection structure of the present invention, and therefore has the same advantages as above.

[0018] Furthermore, the present invention provides a rocket, which includes the nozzle connection structure or engine of the present invention, and therefore has the same advantages as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are 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.

[0020] Figure 1 It is a structural schematic diagram of a nozzle connection structure provided in one embodiment of the present invention when it is in a first state.

[0021] Figure 2 It is a structural schematic diagram of a nozzle connection structure provided in one embodiment of the present invention when it is in a second state.

[0022] Figure 3It is a schematic structural diagram of a limiting groove and a second limiting member provided in one embodiment of the present invention.

[0023] Figure 4 It is a schematic diagram of the structure of the limiting groove provided in one embodiment of the present invention.

[0024] Figure 5 It is a schematic diagram of the overall structure of the first connecting member and the second connecting member provided in one embodiment of the present invention.

[0025] Figure 6 It is a schematic structural diagram of a second connecting member provided in one embodiment of the present invention.

[0026] Figure 7 It is a schematic structural diagram of a first connecting member provided in one embodiment of the present invention.

[0027] Reference numerals: 1: nozzle housing; 101: first through hole; 2: combustion chamber housing; 201: second through hole; 202: limiting groove; 2021: first strip hole; 2022: arc hole; 2023: second strip hole; 3: first connecting member; 4: second connecting member; 5: first limiting member; 6: second limiting member; 7: first elastic member; 8: second elastic member. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0029] In the description of the present embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present embodiment.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this embodiment, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In this embodiment, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0032] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] The connection between the ignition cover and the combustion chamber of the rocket skid-assisted solid rocket engine is usually a threaded connection. Due to the small size of the front opening of the combustion chamber, the threaded connection structure (usually coarse thread) and form fully meet the working environment of the track and will not cause the risk of disintegration. Compared with the connection size of the combustion chamber and the ignition cover, for production needs, the connection between the combustion chamber and the nozzle is usually designed with a large opening. The connection structure between the nozzle and the combustion chamber generally adopts flange connection, threaded connection and clamping ring connection. The above connection methods have the following problems: 1. During the installation process, the flange connection needs to be connected to the combustion chamber by bolts. There are many bolts, nuts and gaskets, and it is easy to make mistakes during the assembly process. In addition, when flange connection is used, the shear stress on the bolts during the track running process is large. In order to ensure the reliability of the connection, the number of bolts is large, which increases the redundant mass and leads to low assembly efficiency.

[0034] 2. The threaded connection has high dimensional accuracy requirements for the mating surface and is relatively long. When there is a quadrant distinction, the processing requirements are too high. The engine top cover and the combustion chamber often need to correspond one to one, and universal matching is not possible. During the running process, the thread is subject to high-frequency vibration impact, and the probability of thread failure is high, which is prone to disintegration risks.

[0035] 3. The clamping ring connection structure requires high processing precision, and the clamping ring block needs to be cut from a circular ring. When installing the nozzle, it is often necessary to sort and match the clamping ring blocks. The preparation process is relatively cumbersome, and it is difficult to disassemble when reinstallation and inspection are required.

[0036] Therefore, the existing connection structure between the nozzle and the combustion chamber has the problems of complex structure, low assembly efficiency, low connection reliability and difficult disassembly.

[0037] Combine the following Figure 1-Figure 7 A nozzle connection structure of the present invention is described. The nozzle housing 1 is provided with a first through hole 101, and the combustion chamber housing 2 is provided with a second through hole 201. The first through hole 101 is opposite to and connected to the second through hole 201. The first through hole 101 and the second through hole 201 are used to install the nozzle connection structure of the embodiment of the present invention. An O-ring is installed between the combustion chamber housing 2 and the nozzle housing 1.

[0038] The nozzle connection structure includes: a first connection member 3 and a second connection member 4.

[0039] One end of the first connecting member 3 is inserted into the first through hole 101 and is movably arranged along the axial direction of the first through hole 101. The other end of the first connecting member 3 can limit the depth of the first connecting member 3 inserted into the first through hole 101 by configuring a first limiting member 5; one end of the second connecting member 4 is connected to one end of the first connecting member 3, and is elastically connected to the inner wall surface of the first through hole 101 through a first elastic member 7. The other end of the second connecting member 4 is provided with a second limiting member 6, and the second limiting member 6 is elastically connected to the outer wall surface of the second connecting member 4 through a second elastic member 8.

[0040] During the assembly process, it is necessary to first align the nozzle shell 1 and the combustion chamber shell 2 to ensure that the first through hole 101 is opposite to and connected with the second through hole 201, and the first connecting member 3 and the second connecting member 4 are respectively inserted into the connected first through hole 101 and the second through hole 201 to ensure that the nozzle shell 1 and the combustion chamber shell 2 are connected through the nozzle connection structure of the present invention.

[0041] Specifically, the first connecting member 3 and the second connecting member 4 are connected to each other, and by pulling the first connecting member 3, the second connecting member 4 can be driven to move axially along the first through hole 101 and the second through hole 201. The first elastic member 7 generally provides tension and is a tension spring; the second elastic member 8 generally provides pressure and is a pressure spring.

[0042] The pipe connection structure provided by the present invention has at least the following two states: First state: applying pressure to the second limiting member 6 so that the second elastic member 8 is in a compressed state, the second limiting member 6 is pressed against the outer wall of the second connecting member 4 so that the overall outer diameter of the second limiting member 6 and the second connecting member 4 combination is less than or equal to the inner diameter of the second through hole 201, and under the pulling force of the first elastic member 7, the second connecting member 4 retracts into the connected first through hole 101 and the second through hole 201, at which time, the limiting effect of the second limiting member 6 fails; a first limiting member 5 is arranged at the upper end of the first connecting member 3 to ensure that the second connecting member 4 is completely moved out of the second through hole 201 into the first through hole 101, and the nozzle connection structure is completely located in the nozzle housing 1, wherein the second connecting member 4 and parts of the first connecting member 3 are hidden in the first through hole 101, and the upper end of the first connecting member 3 extends from the top of the first through hole 101 through the limiting effect of the first limiting member 5. At this time, the nozzle connection structure fails, and the first through hole 101 and the second through hole 201 can move relatively, that is, the combustion chamber housing 2 can be removed from the nozzle housing 1. Figure 1 shown.

[0043] Second state: remove the first stopper 5, and apply downward pressure to the first connecting member 3. The first elastic member 7 is stretched until the second connecting member 4 moves from the first through hole 101 to the second through hole 201. Finally, the second stopper 6 extends from the bottom of the second through hole 201. Under the pressure of the second elastic member 8, the second stopper 6 expands outward and is supported on the outer wall of the combustion chamber housing 2. The tension of the first elastic member 7 is the pressing force of the second connecting member 4 on the combustion chamber housing 2. At this time, the first connecting member 3 and the second connecting member 4 pass through the connected first through hole 101 and the second through hole 201, ensuring the positioning connection between the nozzle housing 1 and the combustion chamber housing 2. Its structure is as follows: Figure 2 shown.

[0044] Preferably, the first stopper 5 can be a circular gasket, which is placed between the outer wall of the nozzle housing 1 and the end of the first connecting member 3, and is used to raise the first connecting member 3 so that the first connecting member 3 and the second connecting member 4 can be retracted into the first through hole 101; in order to facilitate installation and removal, the circular gasket can be composed of two semicircular gaskets connected, and the two can be separated. The second stopper 6 can be a support rod, which is ejected outward under the pressure of the second elastic member 8 and supported on the outer wall of the combustion chamber housing 2. The second elastic member 8 can be compressed by external force, so that the support rod fits on the outer wall of the second connecting member 4, so that the overall outer diameter of the second stopper 6 and the second connecting member 4 is reduced, and can pass through the second through hole 201.

[0045] It can be seen that the combustion chamber and the nozzle can be assembled or disassembled only by applying external force to the second limit member 6 and the first connecting member 3 so that the first connecting member 3 and the second connecting member 4 move in the first through hole 101 and the second through hole 201, and the structure is simple and the operation is convenient; the elastic force of the first elastic member 7 on the first connecting member 3 and the second connecting member 4 replaces the existing threaded fixed connection, and there is no need to consider tolerance. In addition, it has a reset function during high-frequency vibration, which reduces the risk of disintegration caused by thread failure and damage, and the connection reliability is high; moreover, after the nozzle is disassembled, the nozzle connection structure can be left on the nozzle housing 1 without removal, thereby improving the efficiency of assembly and disassembly and maintenance.

[0046] The present invention provides a nozzle connection structure. The nozzle housing 1 is provided with a first through hole 101, and the combustion chamber housing 2 is provided with a second through hole 201. The first through hole 101 is opposite to and connected to the second through hole 201. The first through hole 101 and the second through hole 201 are used to install the nozzle connection structure of the present invention. The nozzle connection structure of the present invention includes: a first connecting member 3 and a second connecting member 4; one end of the first connecting member 3 is inserted into the first through hole 101 and is movably arranged along the axial direction of the first through hole 101, and the other end of the first connecting member 3 can limit the depth of the first connecting member 3 inserted into the first through hole 101 by configuring a first limiting member 5; one end of the second connecting member 4 is connected to one end of the first connecting member 3, and is elastically connected to the inner wall surface of the first through hole 101 through a first elastic member 7, and the other end of the second connecting member 4 is provided with a second limiting member 6, and the second limiting member 6 is elastically connected to the outer wall surface of the second connecting member 4 through a second elastic member 8. The nozzle connection structure provided by the present invention has the advantages of simple structure, convenient operation, no need to consider tolerance, high connection reliability, and improved assembly and disassembly and maintenance efficiency.

[0047] In one embodiment of the present invention, when the first stopper 5 is configured, the first elastic member 7 and the second elastic member 8 are both in a compressed state, the second stopper 6 is pressed against the outer wall of the second connecting member 4, and the first connecting member 3 and the second connecting member 4 are both moved into the first through hole 101; when the first stopper 5 is not configured, the first elastic member 7 and the second elastic member 8 are both in an extended state, the other end of the second connecting member 4 extends out of the second through hole 201, and the second stopper 6 is unfolded and supported on the outer wall of the combustion chamber housing 2. Figure 1 and Figure 2 The nozzle connection structure in this embodiment can switch between the above two states. Figure 1 In the state shown, the first limiter 5 is used to limit the axial position of the first connecting member 3 to ensure that the first connecting member 3 and the second connecting member 4 cannot extend into the second through hole 201, and the combustion chamber and the nozzle can be removed accordingly; Figure 2In the state shown, the first elastic member 7 pulls the second connecting member 4 upward, and the second limiting member 6 on the outer side thereof is supported on the outer wall of the combustion chamber shell, thereby realizing the assembly positioning of the combustion chamber shell 2 and the nozzle shell 1, that is, realizing the assembly of the combustion chamber and the nozzle in place.

[0048] In one embodiment of the present invention, a limiting groove 202 is formed on the outer wall of the combustion chamber housing 2 and located on the outer side of the second through hole 201. The limiting groove 202 is connected to the second through hole 201. The second limiting member 6 is inserted and limited in the limiting groove 202 when in the expanded state, so as to radially position and stop the second connecting member 4. In this embodiment, when the second limiting member 6 is expanded, that is, when the second limiting member 6 is supported on the combustion chamber housing 2, it is actually inserted into the limiting groove 202 provided in the combustion chamber housing 2. After insertion, the second connecting member 4 can be radially limited and stopped. Since the second connecting member 4 is connected to the first connecting member 3, it has radial limiting and anti-rotation effects on the nozzle connection structure. Preferably, according to Figure 3 and Figure 4 As shown, the depth of the limiting groove 202 is consistent with the depth of the second through hole 201. Only when the second limiting member 6 is inserted into the limiting groove 202, it is in the expanded state. Before being inserted into the limiting groove 202, it is in the retracted state.

[0049] In one embodiment of the present invention, the limiting groove 202 includes: a first bar hole 2021, an arc hole 2022, and a second bar hole 2023 connected in sequence, the first bar hole 2021 and the second bar hole 2023 are both arranged along the radial direction of the second through hole 201, and the second bar hole 2023 is located radially outside the first bar hole 2021, and the arc hole 2022 is arranged along the circumferential direction of the second through hole 201; wherein, when the second limiting member 6 is gradually unfolded, it is inserted into the first bar hole 2021, and the second connecting member 4 is rotated to drive the second limiting member 6 to be inserted and moved along the arc hole 2022 until it moves and is inserted into the second bar hole 2023, and the second limiting member 6 is limited in the second bar hole 2023. Figure 3 and Figure 4 As shown, the limiting groove 202 is connected by the first strip hole 2021, the arc hole 2022 and the second strip hole 2023 in sequence. When the second limiting member 6 is unfolded, it is firstly unfolded outward from the second through hole 201 and inserted into the first strip hole 2021. After the second connecting member 4 is rotated, it moves in the arc hole 2022, and finally inserted into the second strip hole 2023 and limited under the pressure of the second elastic member 8. The strip hole extends radially and can limit the rotation of the second connecting member 4. Preferably, one end of the arc hole 2022 is connected to the radial outer side of the first strip hole 2021, and the other end of the arc hole 2022 is connected to the radial inner side of the second strip hole 2023.

[0050] In one embodiment of the present invention, a plurality of the limiting grooves 202 and the second limiting member 6 are provided, the limiting grooves 202 are evenly spaced around the center of the second through hole 201, and the second limiting member 6 is evenly spaced around the center of the second connecting member 4. By providing a plurality of limiting grooves 202 and the second limiting member 6, and the intervals between two adjacent limiting grooves 202 and the second limiting member 6 are equal, the anti-rotation limiting function is enhanced. Preferably, as Figure 3 and Figure 4 As shown, four limiting grooves 202 and four second limiting members 6 are provided.

[0051] In one embodiment of the present invention, the second connecting member 4 is sleeved on the outside of the first connecting member 3, and the second connecting member 4 is connected to the first connecting member 3 in an adjustable manner. Preferably, the second connecting member 4 is formed with a threaded hole having an internal thread, and the first connecting member 3 is formed with an external thread, and the first connecting member 3 is inserted into the threaded hole in an adjustable manner through a threaded connection. Figures 5 to 7 As shown, the first connecting member 3 in this embodiment adopts a screw structure with an external thread, and the second connecting member 4 adopts a screw structure with an internal threaded hole. The two are connected by internal and external threads. By relative rotation of the first connecting member 3 and the second connecting member 4, the relative position of the two in the axial direction can be adjusted, and then cooperate with the first elastic member 7 to achieve the purpose of adjustable clamping force.

[0052] In one embodiment of the present invention, a shrinking hole is formed at one end of the first through hole 101 away from the second through hole 201 for one end of the first connecting member 3 to pass through, a first boss is formed at the other end of the first connecting member 3, and a second boss is formed at the other end of the second connecting member 4, and the outer diameter of the first boss is greater than the inner diameter of the shrinking hole, and the outer diameter of the second boss is less than or equal to the inner diameter of the second through hole 201 and greater than the inner diameter of the shrinking hole. In this embodiment, the shrinking hole on the first through hole 101 can ensure that the nut part of the first connecting member 3 (that is, the first boss) is stuck on the outside of the nozzle, and the nut part of the second connecting member 4 (that is, the second boss) is stuck inside the first through hole 101, which has an anti-slip effect; the second connecting member 4 is connected between the inner end wall of the shrinking hole and the nut part of the second connecting member 4.

[0053] The present invention can realize the assembly or disassembly of the combustion chamber and the nozzle only by applying external force to the second limit member and the first connecting member, so that the first connecting member and the second connecting member move in the first through hole and the second through hole. The structure is simple and the operation is convenient. The elastic force of the first elastic member on the first connecting member and the second connecting member replaces the existing threaded fixed connection, and there is no need to consider tolerance. In addition, it has a reset function during high-frequency vibration, which reduces the risk of disintegration caused by thread failure and damage, and has high connection reliability. Moreover, after the nozzle is dismantled, the nozzle connection structure can be left on the nozzle housing without removal, thereby improving the efficiency of assembly and disassembly and maintenance.

[0054] The present invention is a nozzle connection structure for a solid rocket engine suitable for a high-frequency vibration environment. For the nozzle and combustion chamber connection structure, a screw-like structure made of high-strength steel is used, and a high-strength spring is embedded in the hole groove so that the screw can move within a certain range. A through hole is used at the combustion chamber connection position so that the screw head can be stuck in the groove next to the through hole to form a limit to complete the installation. The invention has the following advantages: First, the efficiency of engine assembly is improved, and the position of the spring pin and the spring pin nut only needs to be adjusted to the predetermined position of the installation groove; Second, the complexity of the connection structure between the nozzle and the combustion chamber is reduced, and the structure is simplified; Third, it adopts a screw-like structure. When subjected to vibration impact, the screw is in a pulling or compressing state, with good force effect, thereby improving the connection reliability.

[0055] The present invention also provides an engine, which includes: the nozzle connection structure in the above embodiment of the present invention.

[0056] The present invention provides an engine, which includes the nozzle connection structure of the present invention, and therefore has the same advantages as above.

[0057] The present invention also provides a rocket, which comprises: the nozzle connection structure or the engine in the above-mentioned embodiment of the present invention.

[0058] The present invention provides a rocket, which includes the nozzle connection structure or engine of the present invention, and therefore has the same advantages as above.

[0059] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, i.e., they may be located in one place, or they may be distributed over multiple units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nozzle connection structure, characterized in that: The nozzle housing (1) is provided with a first through hole (101), and the combustion chamber housing (2) is provided with a second through hole (201), wherein the first through hole (101) and the second through hole (201) are opposite to each other and are in communication with each other; The nozzle connection structure comprises: a first connecting member (3), one end of the first connecting member (3) being inserted into the first through hole (101) and being movably arranged along the axial direction of the first through hole (101), and the other end of the first connecting member (3) being capable of limiting the depth of the first connecting member (3) being inserted into the first through hole (101) by configuring a first limiting member (5); A second connecting member (4), one end of the second connecting member (4) being connected to one end of the first connecting member (3) and being elastically connected to the inner wall surface of the first through hole (101) via a first elastic member (7), and the other end of the second connecting member (4) being provided with a second limiting member (6), and the second limiting member (6) being elastically connected to the outer wall surface of the second connecting member (4) via a second elastic member (8).

2. The nozzle connection structure according to claim 1, characterized in that: When the first limiting member (5) is configured, the first elastic member (7) and the second elastic member (8) are both in a compressed state, the second limiting member (6) is pressed against the outer wall surface of the second connecting member (4), and the first connecting member (3) and the second connecting member (4) are both moved into the first through hole (101); When the first limiting member (5) is not configured, the first elastic member (7) and the second elastic member (8) are both in an extended state, the other end of the second connecting member (4) extends out of the second through hole (201), and the second limiting member (6) is unfolded and supported on the outer wall surface of the combustion chamber shell (2).

3. The nozzle connection structure according to claim 1, characterized in that: A limiting groove (202) is formed on the outer wall of the combustion chamber housing (2) and located outside the second through hole (201); the limiting groove (202) is communicated with the second through hole (201); and the second limiting member (6) is inserted into and limited in the limiting groove (202) in the expanded state, so as to radially position and stop the second connecting member (4).

4. The nozzle connection structure according to claim 3, characterized in that: The limiting groove (202) comprises: a first strip hole (2021), an arc-shaped hole (2022) and a second strip hole (2023) which are connected in sequence, the first strip hole (2021) and the second strip hole (2023) are both arranged along the radial direction of the second through hole (201), and the second strip hole (2023) is located radially outside the first strip hole (2021), and the arc-shaped hole (2022) is arranged along the circumferential direction of the second through hole (201); wherein: When the second limiting member (6) is gradually unfolded, it is inserted into the first strip hole (2021), and the second connecting member (4) is rotated to drive the second limiting member (6) to be inserted into and move along the arc hole (2022) until it moves and is inserted into the second strip hole (2023), and the second limiting member (6) is limited in the second strip hole (2023).

5. The nozzle connection structure according to claim 3, characterized in that: A plurality of the limiting grooves (202) and the second limiting members (6) are provided. The limiting grooves (202) are evenly spaced around the center of the second through hole (201) in the circumferential direction, and the second limiting members (6) are evenly spaced around the center of the second connecting member (4) in the circumferential direction.

6. The nozzle connection structure according to claim 1, characterized in that: The second connecting member (4) is sleeved on the outside of the first connecting member (3), and the second connecting member (4) is connected to the first connecting member (3) in an adjustable manner.

7. The nozzle connection structure according to claim 6, characterized in that: The second connecting member (4) is formed with a threaded hole having an internal thread, the first connecting member (3) is formed with an external thread, and the first connecting member (3) is inserted into the threaded hole in an adjustable position through a threaded connection.

8. The nozzle connection structure according to any one of claims 1 to 6, characterized in that: A shrinking hole for one end of the first connecting member (3) to pass through is formed at one end of the first through hole (101) away from the second through hole (201), a first boss is formed at the other end of the first connecting member (3), and a second boss is formed at the other end of the second connecting member (4), wherein the outer diameter of the first boss is greater than the inner diameter of the shrinking hole, and the outer diameter of the second boss is less than or equal to the inner diameter of the second through hole (201) and greater than the inner diameter of the shrinking hole.

9. An engine, characterized in that: include: The nozzle connection structure according to any one of claims 1 to 8.

10. A rocket, characterized in that: include: The nozzle connection structure according to any one of claims 1 to 8 or the engine according to claim 9.

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