A liquid rocket engine ignition duct assembly device

Abstract

This invention relates to a liquid rocket engine ignition duct assembly device, belonging to the field of mechanical manufacturing and processing. The invention utilizes a base, hinge I, a pin, hinge II, and a sliding tube to achieve 90° rotation and support of the support frame; a support assembly to connect the inner shell and adjust the circumferential direction of the product; a handle rotation to drive a large stud to move the inner shell vertically; and a bracket, pressure plate, and retaining ring to secure the outer shell. This invention solves the problems of fixing, clamping, and applying force to the inner and outer shells of the product, and addresses the issue of inconsistent coaxiality during assembly due to manual operation. It achieves reliable fixing of the inner and outer shells, effectively ensuring assembly accuracy and results, and possesses good manufacturability and practicality.

Description

Technical Field

[0001] This invention belongs to the field of mechanical manufacturing and processing, and relates to an assembly device, particularly an assembly device for a liquid rocket engine ignition conduit. Background Technology

[0002] An ignition conduit is a container for filling and storing the ignition agent in a rocket engine. During engine operation, the ignition agent in the conduit is forced into contact with the oxidizer in the engine propellant by an inert gas, causing spontaneous combustion. This initial energy then ignites the continuous combustion between the fuel and the oxidizer, ensuring reliable engine operation. The ignition agent poses certain risks during transportation and storage; therefore, the ignition conduit, as the container for the ignition agent, must possess reliable and effective sealing and meet strict installation and fixing requirements. It must withstand vibration and shock during transportation, filling, and installation to prevent leakage and explosion of the ignition agent, and must also withstand typical environmental tests such as vibration and shock. Without an assembly device, the following drawbacks exist for the ignition conduit assembly: First, the outer and inner shells of the product cannot be effectively fixed and supported. Second, the assembly positions of the large ends of the outer and inner shells contain sealing rings, and manual labor cannot overcome the friction of the sealing rings to assemble the outer and inner shells into place, resulting in an inability to achieve effective sealing. The large end of the outer shell has two grooves, corresponding to the two protrusions on the large end of the inner shell, and their fitting clearance is small, making it impossible to ensure circumferential alignment during assembly. Third, manual labor cannot precisely achieve the coaxiality requirements of the assembly. Summary of the Invention

[0003] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide an assembly device that is easy to use, has high assembly accuracy, and guarantees assembly results. It is specifically used in the assembly process of engine ignition conduits and effectively improves assembly efficiency.

[0004] The technical solution of the present invention is as follows:

[0005] A liquid rocket engine ignition duct assembly device includes a base, a slide block, a set bolt, a slide tube, a crossbeam, a pressure plate, a support shaft, a sleeve, a large nut, a column, a retaining ring, a positioning plate, a handle I, a screw, a handle, a support plate, a sleeve, a large stud, a handle II, and casters.

[0006] The base has a frame structure, with a slide mounted on one side and a bracket mounted on the other side. A sliding tube is fitted into the slide and fixed to it with set bolts. A support plate is placed on the bracket, with one side fixed to the bracket and the other side rotatably connected to the side of the bracket. A handle is fixed to the support plate. A positioning plate is welded to the support plate via a column. A through hole is machined on the support plate, and a sleeve is located above the through hole. A support shaft is installed on the upper part of the sleeve with a clearance fit. A large nut is threaded into the support shaft, and handle I is connected to the sleeve via a threaded structure. A sleeve is located below the through hole and fixed to the lower surface of the support plate. Handle II is threaded into a large stud, and the large stud is threaded into the sleeve. The support shaft and sleeve have a clearance fit, and the lower part of the support shaft is fixed to the upper part of the sleeve with screws.

[0007] The upper surface of the positioning plate is provided with a square groove, which corresponds to the hexagonal structure on the product shell to achieve circumferential positioning of the product shell; the upper surface of the positioning plate is machined with engraved lines to ensure the unique orientation of the two grooves at the large end of the product shell during installation; the pressure plate is fixed to the positioning plate with bolts, and the pressure plate is provided with a circular groove, in which a retaining ring is fixed; the pressure plate and retaining ring are used to press the product shell tightly.

[0008] The crossbeam is welded to the base and is located between the slide and the bracket. When the support plate rotates 90° around the fixed axis on the side of the bracket, the positioning plate is exactly on the crossbeam. When installing the product, the small end of the inner shell of the product is located above the slide tube.

[0009] The casters are fixed to the four corners of the base with fasteners.

[0010] Preferably, hinge I is fixed to the support plate, hinge II is fixed to the bracket, and hinge I and hinge II are connected by a pin.

[0011] Preferably, the base is a frame formed by welding hollow square steel, and a flat plate is welded at each of the four corners of the lower surface of the frame to provide mounting positions for the casters.

[0012] Preferably, the bottom connection of the slide block is inverted U-shaped and is installed on the base with bolts and nuts, which can achieve fine adjustment along the width direction of the base; the slide tube and the slide block are clearance fit and are fixed with set bolts, which can achieve fine adjustment in the height direction.

[0013] Preferably, the retaining ring consists of two semi-rings, and one of the semi-rings has a rounded corner structure to press against the product shell.

[0014] Preferably, three grooves are provided on the pressure plate, corresponding to the three pipe nozzle positions on the product shell.

[0015] Preferably, the positioning plate is welded to the support plate through three columns. The positioning plate, columns and support plate are all made of hard aluminum 2A12, and weight reduction holes are provided on the positioning plate and support plate.

[0016] Preferably, the square groove on the positioning plate is coaxial with the through hole on the support plate.

[0017] Preferably, the support shaft, sleeve, large nut, and handle I are assembled to form an assembly, with the threaded section on the support shaft connecting to the inner shell of the product; the sleeve has two grooves corresponding to two protrusions on the inner shell of the product; the sleeve can move up and down by rotating the large nut; rotating handle I drives the sleeve to rotate, thereby realizing the circumferential rotation of the inner shell of the product.

[0018] Preferably, the upper part of the sleeve is machined with a through hole, and the lower part of the support shaft is machined with a groove around its circumference. The screw passes through the through hole on the sleeve and is inserted into the groove of the support shaft to achieve a fixed connection between the support shaft and the sleeve.

[0019] The advantages of this invention compared to the prior art are:

[0020] (1) The present invention can stably fix and clamp the product shell, and can achieve the uniqueness of the product assembly position;

[0021] (2) The present invention can stably connect the inner shell of the product and adjust the circumferential position of the large end boss of the inner shell;

[0022] (3) The components formed by the positioning plate, column, and support plate in this invention can be rotated 90°, which facilitates product installation;

[0023] (4) The present invention can effectively meet the coaxiality requirements of product assembly. Attached Figure Description

[0024] Figure 1 For assembly device structure Figure I ;

[0025] Figure 2 For assembly device structure Figure II ;

[0026] Figure 3 This is a diagram of the base structure.

[0027] Figure 4 Structural diagram of the positioning plate, column, and support plate components;

[0028] Figure 5 Structural diagram of the support shaft, sleeve, large nut, and handle I assembly;

[0029] Figure 6 This is a structural diagram of the large stud and handle II assembly;

[0030] Figure 7 Diagram of the clasp structure;

[0031] Figure 8 This is a diagram of the pressure plate structure.

[0032] Figure 9This is a structural diagram of the retaining ring and pressure plate assembly.

[0033] Figure 10 A schematic diagram showing the product in a horizontal assembly state with the support plate rotated 90°.

[0034] Figure 11 Schematic diagram of the large end boss of the product's inner shell;

[0035] Figure 12 A schematic diagram of the product in its vertical assembly position;

[0036] Figure 13 This is a schematic diagram of the groove at the large end of the product casing. Detailed Implementation

[0037] The present invention will now be described with reference to the accompanying drawings.

[0038] like Figure 1 and Figure 2 The diagram shows a liquid rocket engine ignition duct assembly device, which consists of a base 1, a slide 2, a set bolt 3, a slide tube 4, a hinge I 5, a pin 6, a hinge II 7, a crossbeam 8, a pressure plate 9, a support shaft 10, a sleeve 11, a large nut 12, a column 13, a retaining ring 14, a positioning plate 15, a handle I 16, a screw 17, a handle 18, a support plate 19, a sleeve 20, a large stud 21, a handle II 22, a caster 23, and other fasteners.

[0039] The base 1 is a frame structure welded from square steel, with the crossbeam 8 welded to the base. The slide 2 is installed on the base 1 using bolts and nuts. The slide tube 4 is installed on the slide 2 using set bolts. The support plate 19 is placed on the bracket of the base 1, connected to the base 1 on one side by fasteners, and connected to the side of the base 1 bracket on the other side by hinge I 5, pin 6, and hinge II 7. The handle 18 is connected to the support plate 19 using fasteners. The positioning plate 15 is welded to the support plate 19 via the column 13; the pressure plate 9 and retaining ring 14 press the product shell and are connected to the positioning plate 14 by bolts; the sleeve 20 is connected to the support plate 19 by bolts. The sleeve 11 and the support shaft 10 have a clearance fit, and the large nut 12 and the support shaft 10 have a threaded fit. The handle II 22 is connected to the large stud 21 via a threaded structure, and the large stud 21 is connected to the sleeve 20 via a threaded structure. The support shaft 10 and the sleeve 20 are clearance-fitted, and the rotation of the sleeve 20 is converted into the up-and-down movement of the support shaft 10 by screws 17. Casters 23 are connected to the base 1 by fasteners. Figure 4-6 As shown.

[0040] like Figure 3 As shown, the base 1 is a frame formed by welding hollow square steel to achieve the stability of the entire assembly device; four flat plates 24 are welded to the outer edge of the bottom of the frame to provide the connection position of the casters 23 and realize the mobility of the entire assembly device.

[0041] The bottom connection of the slide block 2 is inverted U-shaped and is installed on the base 1 by bolts and nuts, which can achieve fine adjustment along the width of the base; the slide tube 4 and the slide block 2 are clearance fit and are fixed by set bolts 3, which can achieve fine adjustment in the height direction.

[0042] like Figure 7 As shown, to avoid the three protrusions on the product casing, the retaining ring 14 is a set of semi-rings with rounded corners to press firmly against the product casing. Figure 8 As shown, in order to avoid the three connecting nozzles on the product shell, the pressure plate 9 has three grooves in the corresponding positions; the pressure plate 9 is provided with a circular groove, which limits and applies force to the retaining ring 14, thereby pressing the product shell tightly. Figure 9 This is a structural diagram of the retaining ring and pressure plate assembly. The upper end face of the positioning plate 15 is provided with a square groove, corresponding to the hexagonal structure on the product shell, to achieve circumferential positioning of the product shell; the positioning plate 1 is provided with a threaded hole, providing a force reference for the fasteners on the pressure plate 9; the upper end face of the positioning plate 15 is machined with engraved lines, and the product shell can be installed on the engraved lines, thereby ensuring the unique orientation of the two grooves at the large end of the product shell.

[0043] The support plate 19 is provided with hinge I5 fastener connection hole, handle 18 fastener connection hole, and sleeve 20 fastener connection hole.

[0044] The positioning plate 15 is welded to the support plate 19 through three columns 13. The resulting assembly is designed to achieve a 90° rotation. All three parts are made of hard aluminum 2A12, and weight reduction holes are provided on the positioning plate 15 and the support plate 19.

[0045] After the positioning plate 15, column 13 and support plate 19 are welded to form an assembly, the square groove on the positioning plate 15 and the connecting hole of the sleeve 20 on the support plate 19 are machined to ensure their coaxiality.

[0046] The support shaft 10, sleeve 11, large nut 12, and handle I 16 are assembled to form an assembly. The threaded section of the support shaft 10 is connected to the inner shell of the product. The sleeve 11 has two grooves, corresponding to two protrusions on the inner shell of the product. The sleeve 11 can be moved up and down by rotating the large nut 12. The handle I 16 is connected to the sleeve 11 by a threaded structure. Rotating the handle I 16 drives the sleeve 11 to rotate, which can realize the circumferential rotation of the inner shell of the product. Figure 11 Schematic diagram of the large end boss of the product's inner shell; Figure 13 This is a schematic diagram of the groove at the large end of the product casing.

[0047] The sleeve 20 is connected to the support plate 19 by fasteners and to the large stud 21 by a threaded structure. Turning the handle II 22 can drive the large stud 21 to rotate.

[0048] The crossbeam 8 is welded to the base and located between the slide and the bracket; when the support plate 19 rotates 90° around the fixed axis on the side of the bracket, the positioning plate is exactly located on the crossbeam. When installing the product, the small end of the inner shell of the product is located above the slide tube. Hinge I 5 is fixed to the support plate 19, and hinge II 7 is fixed to the bracket. Hinge I 5 and hinge II 7 are connected by pin 6.

[0049] In this invention, after the inner shell of the product is installed horizontally on the support shaft 10, the assembly formed by the inner shell of the product, the positioning plate 15, the column 13, and the support plate 19 is rotated 90° to make it vertical. The outer shell of the product is then installed and fixed. The rotation of the large stud 21 drives the support shaft 10 and the inner shell of the product to move upward. During the process, the protrusion at the large end of the inner shell of the product is adjusted by the sleeve 11 to align with the groove at the large end of the outer shell of the product until the small end faces of the inner and outer shells of the product are in contact, which means that the assembly is in place.

[0050] The principle behind the above scheme is:

[0051] An assembly device is used to fix and clamp the inner and outer shells of the product, and the assembly device itself can achieve coaxiality requirements. The outer shell of the product remains stationary, while the structure on the device moves the inner shell upward, overcoming the friction of the sealing ring and achieving effective assembly.

[0052] Specifically, the method of using the liquid rocket engine ignition duct assembly device of the present invention is as follows:

[0053] Before assembly, loosen the fasteners on the support plate 19 and the base 1 bracket, turn the handle II 22 to position the end face of the sleeve 11 below the positioning plate 15, and lower the large nut 12 to bring the sleeve 11 to a lower position. Figure 1The positioning plate 15, column 13, and support plate 19 are flipped to a horizontal position. They are then installed onto the threaded section of the support shaft 10 using the threaded structure at the large end of the inner shell until the upper surface of the support shaft 10 is flush with the product. The inner shell and assembly device are then flipped 90° again, and the fasteners on the support plate 19 are connected to ensure a stable connection with the bracket of the base 1. Based on the orientation of the engraved lines on the positioning plate 15, the positions of the two symmetrical grooves at the large end of the outer shell are determined. The outer shell is then fitted onto the inner shell from top to bottom until it is placed on the square groove end face of the positioning plate 15, with the square groove restricting its circumferential position. At this point, the inner and outer shells are not yet fully assembled. While rotating the large nut 12 to raise the sleeve 11, rotate the handle I 16 to engage the two symmetrical grooves on the sleeve 11 with the boss at the large end of the inner shell. Then, rotate the handle I 16 again to align it with the direction of the engraved line on the positioning plate 15. This process rotates the inner shell, adjusting its circumferential position so that the boss at its large end aligns with the groove at the large end of the outer shell, facilitating further installation. Rotating the handle II 22 causes the inner shell to slowly rise linearly without changing its circumferential position. When the applied force increases, it indicates that the sealing ring at the large end of the inner shell is in contact with the inner wall of the large end of the outer shell. Continue applying force to continue assembly. Because the clearance between the boss at the large end of the inner shell and the groove at the large end of the outer shell is small, even a slight deviation between them during assembly will prevent the handle II 22 from rotating further. Since the device's structural design ensures the coaxiality of the inner and outer shells during assembly, ensuring the correct circumferential position of the boss and groove solves the assembly problem. At this point, rotate handle I16 to fine-tune the circumferential position of the product's inner shell. During this process, handle II22 must be rotated simultaneously. When force can be applied to handle II22, it indicates that the inner shell boss and the outer shell groove are properly engaged. After this process, continue rotating handle II22 until no force can be applied, indicating that the small end face of the inner shell has contacted the small end face of the outer shell. At this point, the entire assembly process is complete.

[0054] Figure 10 A schematic diagram showing the product in a horizontal assembly state with the support plate rotated 90°. Figure 12 A schematic diagram of the product in its vertical assembly position.

[0055] This invention achieves 90° rotation and support of the bracket through a base, hinge I, pin, hinge II, and slide tube; it connects the inner shell of the product and adjusts the product's circumference through the support assembly; it moves the inner shell upward by rotating the handle to drive the large stud to produce vertical displacement; and it secures the outer shell of the product through the bracket, pressure plate, and retaining ring. This invention solves the problems of fixing, clamping, and applying force to the inner and outer shells of the product, and it also solves the problem of not being able to guarantee coaxiality during assembly through manual operation. It achieves reliable fixing of the inner and outer shells of the product, effectively ensuring assembly accuracy and results, and possesses good manufacturability and practicality.

[0056] The parts of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A liquid rocket engine ignition conduit assembly device, characterized in that: Includes base (1), slide (2), set bolt (3), slide tube (4), crossbeam (8), pressure plate (9), support shaft (10), sleeve (11), large nut (12), column (13), retaining ring (14), positioning plate (15), handle I (16), screw (17), handle (18), support plate (19), sleeve (20), large stud (21), handle II (22), caster (23); The base (1) is a frame structure, the slide (2) is installed on one side of the base (1), and the bracket is installed on the other side of the base; the slide tube (4) is fitted into the slide (2) and fixed to the slide (2) by the set bolt (3); the support plate (19) is placed on the bracket, and one side of the support plate (19) is fixed to the bracket, and the other side is rotatably connected to the side of the bracket; the handle (18) is fixed to the support plate (19); the positioning plate (15) is welded to the support plate (19) through the column (13); the support plate (19) has a through hole, and the sleeve (11) is located in the through hole of the support plate. Above, the support shaft (10) is installed on the upper part of the sleeve (11) with clearance fit, the large nut (12) is threaded to the support shaft (10), and the handle I (16) is connected to the sleeve (11) through a threaded structure; the sleeve (20) is located below the through hole and is fixed to the lower surface of the support plate (19), the handle II (22) is connected to the large stud (21) through a threaded structure, and the large stud (21) is connected to the sleeve (20) through a threaded structure; the support shaft (10) and the sleeve (20) are clearance fit, and the lower part of the support shaft (10) is fixed to the upper part of the sleeve (20) by screws; The upper surface of the positioning plate (15) is provided with a square groove, which corresponds to the hexagonal structure on the product shell, so as to realize the circumferential positioning of the product shell; the upper surface of the positioning plate (15) is machined with engraved lines to ensure the uniqueness of the orientation of the two grooves at the large end of the product shell during installation; the pressure plate (9) is fixed on the positioning plate (15) by bolts, the pressure plate (9) is provided with a round groove, and the retaining ring (14) is fixed in the round groove. The pressure plate (9) and the retaining ring (14) are used to press the product shell; The crossbeam (8) is welded to the base and is located between the slide and the bracket. When the support plate (19) rotates 90° around the fixed axis on the side of the bracket, the positioning plate (15) is exactly on the crossbeam (8). When the product is installed, the small end of the inner shell of the product is located above the slide tube. The casters (23) are fixed to the four corners below the base (1) by fasteners.

2. The liquid rocket engine ignition conduit assembly device according to claim 1, characterized in that: Hinge I (5) is fixed on the support plate (19), and hinge II (7) is fixed on the bracket. Hinge I (5) and hinge II (7) are connected by a pin (6).

3. The liquid rocket engine ignition conduit assembly device according to claim 1, characterized in that: The base (1) is a frame formed by welding hollow square steel. A flat plate (24) is welded at each of the four corners of the lower surface of the frame to provide the installation position for the casters (23).

4. The liquid rocket engine ignition conduit assembly device according to claim 1, characterized in that: The bottom connection of the slide (2) is U-shaped and is installed on the base (1) by bolts and nuts, which can achieve fine adjustment along the width of the base; the slide tube (4) and the slide (2) are clearance fit and are fixed by set bolts (3), which can achieve fine adjustment in the height direction.

5. The liquid rocket engine ignition conduit assembly device according to claim 1, characterized in that: The retaining ring (14) consists of two semi-rings, and each semi-ring has a rounded corner structure to press against the product shell.

6. The liquid rocket engine ignition conduit assembly device according to claim 1, characterized in that: Three grooves are provided on the pressure plate (9), corresponding to the three pipe nozzle positions on the product shell.

7. The liquid rocket engine ignition conduit assembly device according to claim 1, characterized in that: The positioning plate (15) is welded to the support plate (19) through three columns (13). The positioning plate (15), columns (13) and support plate (19) are all made of hard aluminum 2A12, and weight reduction holes are provided on the positioning plate (15) and support plate (19).

8. The liquid rocket engine ignition conduit assembly device according to claim 1, characterized in that: The square groove on the positioning plate (15) is coaxial with the through hole on the support plate (19).

9. The liquid rocket engine ignition conduit assembly device according to claim 1, characterized in that: The support shaft (10), sleeve (11), large nut (12), and handle I (16) are assembled to form an assembly. The threaded section on the support shaft (10) is connected to the inner shell of the product. The sleeve (11) has two grooves, corresponding to two protrusions on the inner shell of the product. The sleeve (11) can be moved up and down by rotating the large nut (12). The sleeve (11) can be rotated by rotating the handle I (16), thereby achieving circumferential rotation of the inner shell of the product.

10. The liquid rocket engine ignition conduit assembly device according to claim 1, characterized in that: The upper part of the sleeve (20) is machined with a through hole, and the lower part of the support shaft (10) is machined with a groove around its circumference. The screw (17) passes through the through hole on the sleeve and is inserted into the groove of the support shaft to achieve a fixed connection between the support shaft (10) and the sleeve (20).

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