Liquid rocket positioning tool, liquid rocket engine and liquid rocket

Abstract

The utility model provides a positioning tool of a liquid rocket, a liquid rocket engine and the liquid rocket. The positioning tool comprises an adapter, a positioning plate, a fixing rod and a pull rod assembly. The positioning plate is connected with a gimbal seat arranged at the top of the thrust chamber through an adapter; the fixing rod is positioned between the positioning plate and the gimbal seat and is transversely connected with the adapter seat; the number of the pull rod assemblies is two, one end of each pull rod assembly is connected with the fixing rod, and the other end of each pull rod assembly is connected with a servo positioning support arranged on the thrust chamber. The positioning plate is connected with the adapter through a first positioning pin, and the center of the positioning plate is positioned through the first positioning pin; the oxidant swing hose and the fuel swing hose are fixed below the positioning plate through a second positioning pin; third positioning pins are arranged at the two transverse ends of the positioning plate correspondingly, and the oxidizing agent swing hose and the fuel swing hose are positioned through the second positioning pins and the third positioning pins correspondingly. The position precision of the swing hose can be accurately controlled, and meanwhile the assembly efficiency in the final assembly process can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid rocket tank, in particular to a positioning tool of liquid rocket, liquid rocket engine and liquid rocket. BACKGROUND

[0002] In the process of launching the rocket, the servo mechanism calculates the control signal by sensing the parameters such as the attitude, speed and position of the rocket, controls the parameters such as the launching direction, speed and position of the rocket, plays an important control role, and enables the rocket to successfully complete the space mission. The swing hose (including the oxidizer swing hose and the fuel swing hose) is an important element of the propellant supply system in the liquid rocket engine, which functions to ensure the normal and reliable delivery of the propellant. The swing hose is used to compensate for the deformation of the pipeline during the swing of the engine, and the swing hose after the pump swing compensates for the deformation of the pipeline by bending, and the swing hose also needs to withstand the axial force generated by the internal pressure of the medium.

[0003] Since the swing hose in the prior art inevitably swings with the engine during use, and the swing hose cannot compensate for the length by bending deformation, the service life of the swing hose is shortened. The adjustment of the servo system is directly related to the swing of the swing hose, and inaccurate positioning can cause the swing hose to break and the launch parameters to be incorrect. Therefore, there is an urgent need for a positioning tool that can ensure the positioning accuracy of the servo system and the swing hose. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the purpose of the embodiments of the present application is to provide a positioning tool of liquid rocket, liquid rocket engine and liquid rocket to solve at least one of the above problems.

[0005] To achieve the above purpose, in a first aspect, the present application provides a positioning tool of liquid rocket, which comprises an adapter seat, a positioning plate, a fixed rod and a pull rod assembly.

[0006] The positioning plate is connected with a gimbal seat arranged at the top of the thrust chamber through the adapter seat;

[0007] The fixed rod is located between the positioning plate and the gimbal seat and is transversely connected with the adapter seat;

[0008] The number of the pull rod assembly is two, one end of each pull rod assembly is connected with the fixed rod, and the other end is connected with a servo positioning support arranged on the thrust chamber;

[0009] The positioning plate is connected with the adapter seat through a first positioning pin, and the center of the positioning plate is positioned through the first positioning pin;

[0010] The oxidant swing hose and the fuel swing hose are fixed below the positioning plate by the second positioning pin;

[0011] The third positioning pin is arranged at each end of the transverse direction of the positioning plate, and the oxidant swing hose and the fuel swing hose are positioned by the second positioning pin and the third positioning pin respectively.

[0012] In some possible embodiments, the servo positioning bracket takes the top surface of the push chamber as a reference plane to determine the mounting position of the servo positioning bracket.

[0013] In some possible embodiments, the third positioning pin at each end of the positioning plate is symmetrically arranged along the transverse center line of the positioning plate.

[0014] In some possible embodiments, the height adjustment range of the pull rod assembly is 600mm to 650mm, and the material of the pull rod assembly is 45# steel after quenching and tempering treatment, and the hardness is HRC38 to HRC42.

[0015] In some possible embodiments, the servo pull rod assembly comprises a right-handed threaded rod and a first nut, a left-handed threaded rod and a second nut, and an adjusting rod arranged between the right-handed threaded rod and the left-handed threaded rod; the right-handed threaded rod and the left-handed threaded rod are threadedly connected with the adjusting rod.

[0016] In some possible embodiments, the adjusting rod is a hexagonal adjusting structure.

[0017] In some possible embodiments, the pin hole gap of the first positioning pin is in the range of 0.01mm to 0.03mm, and the two ends of the first positioning pin are circularly arc transitioned.

[0018] In some possible embodiments, the fixed rod is installed on the adapter in a horizontal state.

[0019] In some possible embodiments, the pull rod assembly is connected with the fixed rod and the servo positioning respectively by a pin.

[0020] In a second aspect, the utility model provides a kind of liquid rocket engine, and the liquid rocket engine includes the positioning tool of first aspect.

[0021] In a third aspect, the utility model provides a kind of liquid rocket, and the liquid rocket includes the liquid rocket engine of second aspect.

[0022] The beneficial effects of the embodiments of the utility model are as follows:

[0023] The positioning tool of the embodiment determines the position of the servo positioning support based on the top plane of the thrust chamber, levels the positioning plate through the leveling mechanism composed of the pull rod assembly, the positioning rod, the adapter seat, the positioning plate and the gimbaling seat, and positions the oxidant swing hose and the fuel swing hose through the positioning pins, so that the positioning precision of the two swing hoses can be accurately controlled and the assembly efficiency in the general assembly process can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0025] Figure 1 is a front view of the positioning tool of the embodiment of the present application for positioning the swing hose;

[0026] Figure 2 is a side view of the positioning tool of the embodiment of the present application for positioning the swing hose;

[0027] Figure 3 is a schematic view of the swing hose positioned on the positioning plate.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 1, adapter seat; 2, positioning plate; 3, fixed rod; 4, pull rod assembly; 5, first positioning pin; 6, oxidant swing hose; 7, fuel swing hose; 8, thrust chamber; 9, servo positioning support; 10, gimbaling seat; 11, second positioning pin; 401, right-handed threaded rod; 402, first nut; 403, left-handed threaded rod; 404, second nut; 405, adjusting rod. DETAILED DESCRIPTION

[0030] The features and exemplary embodiments of each aspect of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without some or all of these specific details. The description of the embodiments is merely illustrative of the present application and is not intended to limit the present application, as is apparent to one of ordinary skill in the art. In the following description, well-known structures and techniques have not been shown in order not to obscure the present application. In the following description, like reference numerals refer to like elements.

[0031] The embodiment of the present application provides a positioning tool for solving low position positioning precision of a swing hose, error of a servo positioning center point is controlled, a servo mechanism is closely contacted with the swing hose, a unified positioning reference is set, a leveling mechanism is set, and the purpose of accurately controlling position precision of the swing hose is achieved, and assembly efficiency in the assembly process is greatly improved.

[0032] Embodiment one

[0033] As shown in Figure 1 The present application provides a positioning tool for a liquid rocket, which comprises: a positioning plate 2 connected with a gimbaling seat 10 arranged on the top of a thrust chamber 8 through an adapter seat 1; a fixed rod 3 located between the positioning plate 2 and the gimbaling seat 10 and transversely connected with the adapter seat 1; a pull rod assembly 4, the number of which is two, one end of each pull rod assembly 4 being connected with the fixed rod 3 and the other end being connected with a servo positioning support 9 arranged on the thrust chamber 8; the positioning plate 2 being connected with the adapter seat 1 through a first positioning pin 5, and the center of the positioning plate 2 being positioned through the first positioning pin 5; an oxidant swing hose 6 and a fuel swing hose 7 being fixed below the positioning plate through a second positioning pin 11; the two ends of the positioning plate in the transverse direction being respectively provided with a third positioning pin 12, and the oxidant swing hose 6 and the fuel swing hose 7 being respectively positioned through the second positioning pin 11 and the third positioning pin 12.

[0034] Specifically, one end of each pull rod assembly 4 is connected with the fixed rod 3, and the other end is connected with the servo positioning bracket 9, and the lengths of the two pull rod assemblies 4 are kept consistent. The height of the two pull rod assemblies 4 is adjusted, and the height adjustment of the pull rod assembly 4 drives the fixed rod 3 to move up and down. The fixed rod 3 drives the gimbaling seat 10 to adjust the distance of the positioning plate 2 in the X direction and the Y direction through the adapter seat 1, so as to adjust the leveling of the positioning plate 2. During the leveling process, the levelness of the upper surface of the positioning plate 2 can be measured by the level. After leveling, the positioning plate 2 is fixed with the adapter seat 1 by the first positioning pin 5 and the bolt. Wherein, the X direction and the Y direction are two directions perpendicular to each other on the same horizontal plane. In addition, in the embodiment, the number of the second positioning pin 11 and the third positioning pin 12 can be determined according to the actual situation, and the embodiment does not make specific limitation.

[0035] Specifically, as shown in Figure 3 , the distances A1 and A2 between the center of the oxidant swinging hose 6 and the center of the fuel swinging hose 7 and the center of the positioning plate 2 are measured by using the caliper respectively. A1 = A2 is achieved by adjusting the second positioning pin, and then the distances B1, B2, C1 and C2 between the centers of the two hoses and the third positioning pin 12 on the positioning plate 2 are measured. B1 = B2 and C1 = C2 are achieved by adjusting the second positioning pin 11, and then the oxidant swinging hose 6 and the fuel swinging hose 7 are fixed with the positioning plate 2 by the second positioning pin 11 and the bolt. The size deviation of the embodiment can be controlled within the range of -0.1 ~ +0.1 mm, which is sufficient to ensure the positioning accuracy of the swinging hose.

[0036] In the embodiment, the positioning pins are respectively installed at the corresponding positions, the center of the positioning plate 2 is aligned with the center of the thrust chamber 8 by the first positioning pin 5, and the X and Y direction sizes of the two hose centers from the center of the thrust chamber 8 can be determined by measuring the distances of the two hose centers from the center of the positioning plate 2. After the bolt is fastened, the precise positioning of the two swinging hoses is realized.

[0037] As shown in Figure 1 and Figure 2 , in some embodiments, the servo positioning bracket 9 takes the top surface of the thrust chamber 8 as the reference plane to position the installation position of the servo positioning bracket 9.

[0038] In the embodiment, the position of the servo positioning bracket 9 is determined based on the top end surface of the thrust chamber 8, and the positioning and fastening are realized by the bolt and the positioning pin. The servo positioning bracket 9 is made of a material with high rigidity, for example, 45# steel is used for quenching and tempering heat treatment, and the hardness requirement is HRC38 ~ 42, so as to prevent deformation and position deviation during welding forming.

[0039] The top end face of the thrust chamber 8 is taken as a reference plane for determining the mounting position of the servo positioning bracket 9 in this embodiment. By measuring the distance or angle between the servo positioning bracket 9 and the top end face of the thrust chamber 8, the mounting position of the servo positioning bracket 9 can be accurately controlled, and the relative positional relationship between the servo positioning bracket 9 and the thrust chamber 8 and other related components can be ensured to meet the design requirements.

[0040] In some embodiments, the third positioning pins 12 arranged at each end of the positioning plate 2 are symmetrically arranged along the transverse center line of the positioning plate 2. By such arrangement, the two hose centers can be aligned in the Y direction and located at the center of the positioning plate 2, further improving the positioning accuracy.

[0041] In some embodiments, the height adjustment range of the pull rod assembly 4 is 600mm to 650mm, and the material of the pull rod assembly 4 is 45# steel after quenching and tempering treatment, with a hardness of HRC38 to HRC42.

[0042] In this embodiment, 45# steel with good material stiffness is selected and then subjected to quenching and tempering treatment to meet the hardness requirement and prevent deformation during positioning, which affects the positioning accuracy.

[0043] In some embodiments, the pull rod assembly 4 includes a right-handed threaded rod 401 and a first nut 402, a left-handed threaded rod 403 and a second nut 404, and an adjustment rod 405 arranged between the right-handed threaded rod 401 and the left-handed threaded rod 403; the right-handed threaded rod 401 and the left-handed threaded rod 403 are threadedly connected with the adjustment rod 405. Optionally, the adjustment rod 405 is a hexagonal adjustment structure.

[0044] Specifically, the pull rod assembly 4 has the function of adjusting the height, one end adopts the fastening mode of the right-handed threaded rod 401 and the first nut 402, the other end adopts the fastening mode of the left-handed threaded rod 403 and the second nut 404, and the middle adopts a hexagonal adjustment structure. When the hexagonal adjustment structure in the middle is rotated, the threaded rods at both ends will be screwed in or out in different directions, thereby changing the overall length of the servo pull rod assembly 4, achieving height adjustment, and then accurately adjusting the X direction and Y direction positions of the positioning plate 2 through the gimbaling seat 10.

[0045] The pull rod assembly 4 of this embodiment can make the threaded rods at both ends move in different directions by matching the right-handed thread at one end and the left-handed thread at the other end, so as to achieve height adjustment and also bidirectionally fine-tune the position of the gimbaling seat 10, increase the flexibility and diversity of adjustment, and better adapt to different installation and debugging requirements.

[0046] By rotating the hexagonal adjusting structure, the rotation in or out of the threaded rods at both ends can be finely controlled, realizing the precise adjustment of the length of the pull rod assembly 4, and thus meeting the requirements for high-precision adjustment of the position of the positioning plate 2 in the X and Y directions. The positioning plate 2 positions the two swing hoses, ensuring the positioning accuracy of the positioning tool. In addition, the hexagonal structure facilitates operation using appropriate tools (such as wrenches, etc.), making it easy to rotate for adjustment. Compared with some complex adjustment methods, the operation is simpler and faster, improving work efficiency.

[0047] In some embodiments, the pin hole gap of the first positioning pin 5 is 0.01mm to 0.03mm, and the two ends of the first positioning pin 5 are circularly arc transitioned.

[0048] In this embodiment, the pin hole gap is 0.03mm to 0.15mm, which can ensure high cooperation accuracy between the first positioning pin 5 and the pin hole. It can not only ensure the accurate positioning of the first positioning pin 5 in the pin hole, realizing the precise installation of parts, but also avoid the installation difficulty caused by too small gap and the inaccurate positioning caused by too large gap, thereby meeting the high-precision positioning requirements of the mechanism for swing hoses and other parts, and making the equipment run stably and reliably.

[0049] In actual production, there will inevitably be some errors in the manufacture of parts. This pin hole gap can compensate for these errors, allowing the first positioning pin 5 and the pin hole to have a small size difference within a certain range, so that even in the presence of manufacturing tolerances, good assembly can still be achieved, improving the interchangeability of parts and the success rate of assembly. In addition, this gap range allows the first positioning pin 5 to be inserted into the pin hole relatively smoothly during installation, without excessive resistance due to too small gap, and it is also relatively easy to pull out during disassembly, reducing the workload and difficulty in the assembly and maintenance process, and improving work efficiency. The equipment may be affected by factors such as temperature and vibration during operation. This pin hole gap range can adapt to these changes to some extent, for example, when the temperature rises, the parts may expand due to heat, and appropriate gap can prevent the positioning pin from being stuck due to expansion, ensuring that the mechanism can operate normally under different working conditions.

[0050] By setting the two ends of the first positioning pin 5 as a circular arc transition, when the first positioning pin 5 is inserted into the pin hole, the end of the circular arc transition can play a guiding role, making the positioning pin easier to align with the pin hole, reducing the installation difficulty and improving the installation efficiency. Especially in the case of requiring rapid assembly or having high assembly precision requirements, this guiding role can reduce the problems such as jamming and collision caused by the misalignment of the positioning pin and the pin hole, avoiding damage to the pin hole or the positioning pin. Moreover, when the equipment needs to be repaired, disassembled or replaced with parts, the circular arc transition positioning pin is easier to pull out of the pin hole. Compared with sharp or right-angled ends, the circular arc end will not be stuck in the edge of the pin hole, reducing the resistance during disassembly and making the disassembly process smoother, which helps to improve the convenience and efficiency of equipment maintenance. Since the circular arc transition avoids direct rigid contact and friction between the end of the first positioning pin 5 and the edge of the pin hole, it can effectively reduce the wear on the surface of the pin hole and the positioning pin during installation and disassembly, thereby prolonging the service life of the positioning pin and the pin hole and ensuring the long-term stability of the positioning accuracy. If the surface of the pin hole or the positioning pin is worn, scratched or has other defects, it may cause the positioning accuracy to decrease, affecting the performance of the entire mechanism

[0051] In some embodiments, the fixed rod 3 is installed in a horizontal state on the adapter seat 1.

[0052] In this embodiment, the horizontally installed fixed rod 3 can provide stable and accurate support reference for other components connected thereto, such as the pull rod assembly 4, the positioning plate 2, etc. Installation based on the horizontal state can ensure the positional accuracy of these components in the horizontal direction, which is conducive to achieving accurate assembly and positioning of the components in the entire mechanism, thereby ensuring the overall performance and function of the mechanism. The horizontally installed fixed rod 3 is convenient for installation personnel to operate. During installation, it is easy to calibrate and adjust the fixed rod 3 to the horizontal requirement through tools such as a level, reducing the installation difficulty and improving the installation efficiency. During the debugging stage, horizontal installation is also conducive to adjusting and calibrating the positions and postures of other components in the mechanism, which is convenient for finding and solving problems that occur during installation.

[0053] The horizontally installed fixed rod 3 can better withstand and transmit forces from other components. When the mechanism is running, the forces acting on the fixed rod 3 can be more evenly distributed on the adapter seat 1, avoiding uneven distribution of forces due to inclined installation of the fixed rod, thereby reducing the local stress concentration on the adapter seat 1 and the fixed rod 3, improving the stability and reliability of the entire structure, and prolonging the service life of the components.

[0054] In some embodiments, the pull rod assembly 4 is connected to the fixed rod 3 and the servo positioning bracket 9 through a pin 13 respectively.

[0055] The pin 13 can provide accurate positioning, ensure the relative position between the pull rod assembly 4 and the fixed rod 3 and the servo positioning support 9, meet the requirements of the mechanism on the assembly position accuracy of each component, and help to ensure the performance and stability of the whole mechanism. The pin 13 can effectively transmit force and torque, so that the pull rod assembly 4 and the fixed rod 3 and the servo positioning support 9 form a stable connection, can withstand certain external force and vibration during operation of the mechanism, and is not prone to loosening or falling off, thereby improving the reliability and safety of the mechanism. The installation and disassembly process of the pin connection is relatively simple, and does not require complex tools and processes. During installation, the pin 13 can be connected only by being inserted into the corresponding hole; when the component needs to be repaired or replaced, the pin 13 can be easily pulled out, so that the mechanism can be conveniently maintained and maintained, and the maintenance cost and time are reduced.

[0056] Embodiment two

[0057] The utility model embodiment further provides a kind of liquid rocket engine, and the liquid rocket engine includes the positioning tool of embodiment one.

[0058] Embodiment three

[0059] The utility model embodiment further provides a kind of liquid rocket, and the liquid rocket includes the liquid rocket engine of embodiment two.

[0060] The engine of the launch vehicle provided in the embodiment uses the positioning tool of embodiment one, the positioning tool takes the top plane of thrust chamber as reference to determine the position of servo positioning support 9, the leveling mechanism formed by pull rod assembly 4, positioning rod 3, adapter seat 1, positioning plate 2 and gimbaling seat 10 is used to level positioning plate 2, and a plurality of positioning pins are used to position oxidant swing hose 6 and fuel swing hose 7, so that the positioning accuracy of the two swing hoses can be accurately controlled, and the assembly efficiency in general assembly process can be improved.

[0061] The embodiment solves the problem of low swing hose position positioning accuracy in the prior art, forms close contact between servo positioning support and swing hose by controlling the error of the center point of servo positioning support, welds and assembles unified positioning reference, sets leveling mechanism, to achieve the purpose of accurately controlling swing hose position positioning accuracy, and greatly improve the assembly efficiency in general assembly process.

[0062] In the description of the embodiments of the utility model, need explanation, the "up, down, inside and outside" and so on in the term of the direction or position relation shown in the drawing is based on the direction or position relation, only for the convenience of describing the utility model and simplifying the description, and is not the indication or the implied device or the element must have a particular direction, with a particular direction structure and operation, therefore cannot be understood as the restriction of the utility model. In addition, the term "first, second or third" is only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0063] Unless otherwise explicitly specified and limited, the term "mounting, connecting, connection" in the embodiments of the utility model should be understood broadly, for example: it can be fixed connection, detachable connection or integrated connection; it can also be mechanical connection, electrical connection or direct connection, it can also be indirectly connected through intermediate medium, and it can also be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0064] Although the utility model has been described with reference to the preferred embodiments, various improvements can be made and the components therein can be replaced with equivalents without departing from the scope of the utility model. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A positioning tool for a liquid rocket, characterized by, The positioning tool comprises an adapter seat (1), a positioning plate (2), a fixed rod (3) and a pull rod assembly (4); The positioning plate (2) is connected with a gimbal seat (10) arranged on the top of a thrust chamber (8) through the adapter seat (1); The fixed rod (3) is arranged between the positioning plate (2) and the gimbal seat (10) and is connected with the adapter seat (1); The pull rod assembly (4) comprises two pull rods, one end of each pull rod is connected with the fixed rod (3), and the other end is connected with a servo positioning support (9) arranged on the thrust chamber (8); The positioning plate (2) is connected with the adapter seat (1) through a first positioning pin (5), and the center of the positioning plate (2) is positioned through the first positioning pin (5); An oxidant swing hose (6) and a fuel swing hose (7) are fixed below the positioning plate (2) through a second positioning pin (11); Third positioning pins (12) are arranged at the two ends of the positioning plate (2) in the transverse direction, and the oxidant swing hose (6) and the fuel swing hose (7) are positioned through the second positioning pin (11) and the third positioning pin (12), respectively.

2. The positioning tool of claim 1, wherein The servo positioning support (9) takes the top surface of the thrust chamber (8) as a reference plane, and the mounting position of the servo positioning support (9) is positioned through the reference plane.

3. The positioning tool of claim 1, wherein The third positioning pins (12) arranged at each end of the positioning plate (2) are symmetrically arranged along the transverse center line of the positioning plate (2).

4. The positioning tool of claim 1, wherein The height adjustment range of the pull rod assembly (4) is 600mm to 650mm, the material of the pull rod assembly (4) is 45 steel after quenching and tempering treatment, and the hardness is HRC38 to HRC42.

5. The positioning tool of claim 1, wherein The pull rod assembly (4) comprises a right-handed threaded rod (401) and a first nut (402), a left-handed threaded rod (403) and a second nut (404), and an adjusting rod (405) arranged between the right-handed threaded rod (401) and the left-handed threaded rod (403); the right-handed threaded rod (401) and the left-handed threaded rod (403) are threadedly connected with the adjusting rod (405).

6. The positioning fixture of claim 5, wherein The adjusting rod (405) is a hexagonal adjusting structure.

7. The positioning fixture of claim 1, wherein The pin hole gap of the first positioning pin (5) is 0.01mm to 0.03mm, and the two ends of the first positioning pin (5) are circularly transitioned; The pull rod assembly (4) is connected with the fixed rod (3) and the servo positioning support (9) through a pin (13), respectively.

8. The positioning fixture of claim 1, wherein The fixed rod (3) is installed on the adapter seat (1) in a horizontal state.

9. A liquid rocket engine, characterized in that The liquid rocket engine comprises the positioning tool according to any one of claims 1-8.

10. A liquid rocket, characterized in that, The liquid rocket comprises the liquid rocket engine according to claim 9.

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