Ignition guide pipe assembling device of liquid rocket engine

Abstract

The invention discloses a liquid rocket engine ignition guide pipe assembling device and belongs to the field of machine manufacturing and machining. Through the base, the hinge I, the pin shaft, the hinge II and the sliding pipe, 90-degree overturning and supporting of the support are achieved; the connection of the inner shell of the product and the circumferential adjustment of the product are realized through the supporting assembly; the handle rotates to drive the large stud to generate displacement in the vertical direction, so that the inner shell of the product moves upwards; the product shell is fastened through the support, the pressing plate and the clamping ring. The problems of fixing, clamping and force applying of the inner shell and the outer shell of the product are solved, the problem that the coaxiality in the assembling process cannot be guaranteed through manual operation is solved, reliable fixing of the inner shell and the outer shell of the product is achieved, the assembling precision and result are effectively guaranteed, and good manufacturability and practicability are achieved.

Description

Technical Field

[0001] The invention belongs to the field of mechanical manufacturing and processing, and relates to an assembly device, in particular to an ignition guide tube assembly device for a liquid rocket engine. Background Art

[0002] The ignition tube is a container for filling and storing rocket engine ignition agent. During the operation of the engine, the ignition agent in the ignition tube is squeezed by inert gas to contact with the oxidizer in the engine propellant, causing spontaneous combustion. It acts as initial energy to trigger continuous combustion between the fuel and the oxidizer to ensure reliable operation of the engine. The engine ignition agent is dangerous during transportation and storage. Therefore, the ignition tube as an ignition agent container must have reliable and good sealing and strict installation and fixing requirements. It must withstand shaking and vibration environments during transportation, filling and installation to ensure that the ignition agent does not leak or explode, and can withstand typical environmental test assessments such as vibration and shock. If there is no assembly device for the assembly of the ignition guide, one of the disadvantages is that the product outer shell and the product inner shell cannot be effectively fixed and supported; the second disadvantage is that the assembly positions of the large ends of the product outer shell and the large ends of the product inner shell contain sealing rings, and human power cannot overcome the friction of the sealing rings to assemble the outer shell and the inner shell into place, and the product cannot achieve effective sealing; the large end of the product outer shell has two grooves, corresponding to the two bosses at the large end of the product inner shell, and the matching clearance is small, and the assembly process cannot simultaneously ensure circumferential alignment; the third disadvantage is that human power cannot accurately achieve the assembly coaxiality requirements. Summary of the invention

[0003] The technical problem solved by the present invention is to overcome the deficiencies of the prior art and provide an assembly device which is easy to use, has high assembly precision and guaranteed assembly results, and is specially used in the assembly process of an engine ignition duct, thereby effectively improving assembly efficiency.

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

[0005] A liquid rocket engine ignition guide tube assembly device, comprising a base, a slide seat, a set bolt, a slide tube, a crossbeam, a pressure plate, a support shaft, a sleeve, a large nut, a column, a clamping ring, a positioning plate, a handle I, a screw, a handle, a support plate, a sleeve, a large stud, a handle II, and a caster;

[0006] The base is a frame structure, the slide is installed on one side of the base, and the bracket is installed on the other side of the base; the slide tube is sleeved in the slide and fixed to the slide by a fixing bolt; the support plate is placed on the bracket, and one side of the support plate is fixed to the bracket, and the other side is rotatably connected to the side of the bracket; the handle is fixed to the support plate; the positioning plate is welded to the support plate through a column; a through hole is processed on the support plate, the sleeve is located above the through hole of the support plate, the support shaft is installed on the upper part of the sleeve in a clearance fit manner, the large nut and the support shaft are threaded, and the handle I is connected to the sleeve through a threaded structure; the sleeve is located below the through hole and fixed to the lower surface of the support plate, the handle II is connected to the large stud through a threaded structure, and the large stud is connected to the sleeve through a threaded structure; the support shaft and the sleeve are clearance fit, and the lower part of the support shaft and the upper part of the sleeve are fixedly connected by screws;

[0007] The upper end surface of the positioning plate is provided with a square groove, corresponding to the hexagonal structure on the product shell, to achieve circumferential positioning of the product shell; the upper end surface of the positioning plate is processed 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 pressing plate is fixed to the positioning plate by bolts, and a circular groove is provided on the pressing plate, and a clamping ring is fixed in the circular groove, and the pressing plate and the clamping ring are used to press the product shell;

[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 located on the crossbeam. When the product is installed, the small end of the inner shell of the product is located above the slide tube.

[0009] The casters are fixed at the four corners below the base by fasteners.

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

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

[0012] Preferably, the bottom connection part of the slide seat is an inverted U-shape, which is installed on the base by bolts and nuts, and can achieve fine-tuning along the width direction of the base; the slide tube and the slide seat are clearance-fitted, and are fixed by tightening bolts, so that fine-tuning in the height direction can be achieved.

[0013] Preferably, the clamping ring is composed of two half rings, and one of the half rings is provided with a rounded structure to press the product shell.

[0014] Preferably, three grooves are provided on the pressure plate, corresponding to three positions of the pipe nozzles on the product housing.

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

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

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

[0018] Preferably, a through hole is processed on the upper part of the sleeve, and a circle of grooves is processed circumferentially on the lower part of the support shaft. The screw passes through the through hole on the sleeve and is inserted into the groove of the support shaft to achieve fixed connection between the support shaft and the sleeve.

[0019] The advantages of the present invention compared with the prior art are:

[0020] (1) The present invention can stably fix and clamp the product housing and realize 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 boss at the large end of the inner shell;

[0022] (3) The assembly formed by the positioning plate, column, support plate, etc. in the present invention can be flipped 90° to facilitate product installation;

[0023] (4) The present invention can effectively achieve the coaxiality requirements of product assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 For assembling the device structure Figure I ;

[0025] Figure 2 For assembling the device structure Figure II ;

[0026] Figure 3 The base structure diagram is shown below:

[0027] Figure 4 It is the structural diagram of the positioning plate, column and support plate assembly;

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

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

[0030] Figure 7 Figure 2 is a structural diagram of the clamp ring;

[0031] Figure 8 It is the structural diagram of the pressure plate;

[0032] Fig. 9This is the assembly structure diagram of the clamp ring and the pressure plate;

[0033] Fig.10 The support plate is rotated 90°, and the product is assembled in a horizontal state;

[0034] Fig.11 This is a schematic diagram of the large end boss of the product inner shell;

[0035] Fig.12 This is a schematic diagram of the product in vertical assembly state;

[0036] Fig.13 This is a schematic diagram of the groove at the large end of the product shell. DETAILED DESCRIPTION

[0037] The present invention will be described below in conjunction with the accompanying drawings.

[0038] like Figure 1 and Figure 2 As shown, it is a schematic diagram of the assembly device of the ignition guide tube of the liquid rocket engine, which consists of a base 1, a slide seat 2, a fastening 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 by square steel, and the crossbeam 8 is welded to the base. The slide 2 is installed on the base 1 by bolts and nuts. The slide tube 4 is installed on the slide 2 by tightening bolts. The support plate 19 is placed on the bracket of the base 1, one side is connected to the base 1 by fasteners, and the other side is connected to the side of the bracket of the base 1 by hinge Ⅰ5, pin 6, hinge Ⅱ7. The handle 18 is connected to the support plate 19 by fasteners. The positioning plate 15 is welded to the support plate 19 through the column 13; the pressure plate 9 and the clamping 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 are clearance-matched, and the large nut 12 and the support shaft 10 are threaded. The handle Ⅱ22 is connected to the large stud 21 by a threaded structure, and the large stud 21 is connected to the sleeve 20 by a threaded structure. The support shaft 10 and the sleeve 20 are clearance-matched, and the rotation of the sleeve 20 is converted into the up and down movement of the support shaft 10 by the screw 17. The caster 23 is connected to the base 1 by a fastener. Figure 4-6 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 frame at the bottom of the frame to provide connection positions for casters 23 to achieve the mobility of the entire assembly device;

[0041] The bottom connection part of the slide 2 is an inverted U-shape, which is installed on the base 1 by bolts and nuts, and can achieve fine-tuning along the width direction of the base; the slide tube 4 and the slide 2 are clearance-fitted, and are fixed by tightening bolts 3, and can achieve fine-tuning in the height direction.

[0042] like Figure 7 As shown, in order to avoid the three protrusions on the product shell, the clamping ring 14 is a set of half rings, and a rounded structure is set to press the product shell. Figure 8 As shown, in order to avoid the three pipe nozzles on the product shell, the pressure plate 9 has three grooves at corresponding positions; a circular groove is provided on the pressure plate 9, and the clamping ring 14 is limited and force is applied through the circular groove, thereby pressing the product shell. Fig. 9 The diagram is a structural diagram of the assembly of the clamping ring and the pressure plate. The upper end surface of the positioning plate 15 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 positioning plate 1 is provided with a threaded hole to provide a force reference for the fasteners on the pressure plate 9; the upper end surface of the positioning plate 15 is processed with a score line, and the product shell can be installed on the score line, thereby ensuring the uniqueness of the orientation of the two grooves at the large end of the product shell.

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

[0044] The positioning plate 15 is welded to the support plate 19 through three columns 13. In order to achieve a 90° flip, the three parts are made of hard aluminum 2A12, and weight-reducing holes are set on the positioning plate 15 and the support plate 19.

[0045] After the positioning plate 15, the column 13, and the 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 processed to ensure their coaxiality;

[0046] The support shaft 10, the sleeve 11, the large nut 12, and the handle Ⅰ16 are assembled to form an assembly. The threaded section on the support shaft 10 is connected to the inner shell of the product; two grooves are provided on the sleeve 11, corresponding to the 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 Ⅰ16 is connected to the sleeve 11 through a threaded structure, and rotating the handle Ⅰ16 drives the sleeve 11 to rotate, which can realize the circumferential rotation of the inner shell of the product. Fig.11 This is a schematic diagram of the large end boss of the product inner shell; Fig.13 This is a schematic diagram of the groove at the large end of the product shell.

[0047] The sleeve 20 is connected to the support plate 19 through a fastener, and is connected to the large stud 21 through a threaded structure. The large stud 21 can be driven to rotate by turning the handle II 22.

[0048] 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 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 I5 is fixed to the support plate 19, hinge II7 is fixed to the bracket, and hinge I5 and hinge II7 are connected by a pin 6.

[0049] In the present invention, after the product inner shell is installed on the support shaft 10 in a horizontal state, the assembly formed by the product inner shell and the positioning plate 15, the column 13, and the support plate 19 is flipped 90° to make it in a vertical state, and the product outer shell is installed and fixed. The support shaft 10 and the product inner shell are driven upward by the rotation of the large stud 21. During the process, the boss at the large end of the product inner shell is adjusted by the sleeve 11 to align with the groove at the large end of the product outer shell 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 of the above scheme is:

[0051] The assembly device is used to fix and clamp the inner shell and outer shell of the product respectively. The assembly device structure itself can achieve the coaxiality requirements. The outer shell of the product does not move, and the structure on the device drives the inner shell of the product to move up, overcome the friction of the sealing ring, and achieve effective assembly.

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

[0053] Before assembly, release the fasteners on the support plate 19 and the bracket of the base 1, turn the handle II 22 to make the end face of the sleeve 11 below the positioning plate 15, and lower the large nut 12 to make the sleeve 11 in a lower position. Figure 1, turn the positioning plate 15, column 13, support plate 19 and other components to a horizontal state, install it on the threaded section of the support shaft 10 through the threaded structure of the large end of the product inner shell, until the upper end surface of the support shaft 10 is close to the product, turn the product inner shell and the assembly device 90° again, and connect the fasteners on the support plate 19 to stably connect it to the bracket of the base 1. According to the orientation of the engraved lines on the positioning plate 15, after determining the orientation of the two symmetrical grooves at the large end of the product shell, fit the product shell onto the product inner shell from top to bottom until the product shell is placed on the square groove end surface of the positioning plate 15 and its circumferential position is limited by the square groove. At this time, the product inner shell and outer shell have not yet been assembled in place. While rotating the large nut 12 to make the sleeve 11 rise, turn the handle Ⅰ16 so that the two symmetrical grooves on the sleeve 11 clamp the boss of the large end of the product inner shell. At this time, turn the handle Ⅰ16 again to keep it consistent with the direction of the engraved line on the positioning plate 15. This process drives the product inner shell to rotate and adjust the circumferential position of the inner shell so that the large end boss corresponds to the large end groove of the product outer shell, which is convenient for further installation. Turn the handle Ⅱ22 to drive the product inner shell to rise slowly and linearly without changing the circumferential position. When the rotation force becomes larger, it indicates that the large end sealing ring of the product inner shell contacts the inner wall of the large end of the product outer shell. At this time, continue to apply force to continue assembly. Since the matching clearance between the large end boss of the product inner shell and the large end groove of the product outer shell is small, if there is a slight deviation between the inner shell boss and the outer shell groove during the assembly process, the handle Ⅱ22 will not be able to rotate further. Since the device ensures the coaxiality of the inner shell and the outer shell during the assembly process through structural design, the assembly problem can be solved by ensuring that the circumferential position of the inner shell boss and the outer shell groove is correct. At this time, turn the handle Ⅰ16 to fine-tune the circumferential position of the product's inner shell. During the implementation of this process, the handle Ⅱ22 needs to be turned synchronously. When force can be applied to the handle Ⅱ22, it indicates that the inner shell boss and the outer shell groove of the product have been matched. After this process, continue to turn the handle Ⅱ22 until force can no longer be applied, indicating that the small end face of the inner shell of the product has contacted the small end face of the outer shell of the product. At this time, the entire assembly process is completed.

[0054] Fig.10 The support plate is rotated 90°, and the product is assembled in a horizontal state; Fig.12 This is a schematic diagram of the product assembly in vertical state.

[0055] The present invention realizes 90° flipping and support of the bracket through the base, hinge I, pin shaft, hinge II and slide tube; realizes connection of the inner shell of the product and circumferential adjustment of the product through the support assembly; drives the large stud to produce vertical displacement through the rotation of the handle to realize upward movement of the inner shell of the product; and realizes the fastening of the outer shell of the product through the bracket, pressure plate and clamping ring. The present invention solves the problems of fixing, clamping and applying force on the inner and outer shells of the product, and solves the problem that the coaxiality of the assembly process cannot be guaranteed through manual operation, realizes reliable fixing of the inner and outer shells of the product, effectively guarantees the assembly accuracy and results, and has good processability and practicality.

[0056] Parts of the present invention that are not described in detail belong to the well-known technologies of those skilled in the art.

Claims

1. A liquid rocket engine ignition guide tube assembly device, characterized in that: It comprises a base (1), a slide seat (2), a fixing bolt (3), a slide tube (4), a crossbeam (8), a pressure plate (9), a support shaft (10), a sleeve (11), a large nut (12), a column (13), a snap 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), and a caster (23); The base (1) is a frame structure, the slide seat (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 sleeved in the slide seat (2) and fixed to the slide seat (2) by a fixing 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); a through hole is processed on the support plate (19), and the sleeve (11) is located in the through hole of the support plate At the top, the support shaft (10) is installed on the upper part of the sleeve (11) in a clearance fit manner, the large nut (12) and the support shaft (10) are threadedly matched, 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 matched, and the lower part of the support shaft (10) and the upper part of the sleeve (20) are fixedly connected by screws; The upper end surface of the positioning plate (15) is provided with a square groove corresponding to the hexagonal structure on the product shell, so as to realize the circumferential positioning of the product shell; the upper end surface of the positioning plate (15) is processed 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 pressing plate (9) is fixed to the positioning plate (15) by bolts, and a circular groove is provided on the pressing plate (9), and the clamping ring (14) is fixed in the circular groove, and the pressing plate (9) and the clamping ring (14) are used to press the product shell tightly; The crossbeam (8) is welded to the base and is located between the slide seat 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 located on the crossbeam (8), and 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 ignition guide tube assembly device for a liquid rocket engine according to claim 1, characterized in that: The hinge I (5) is fixed on the support plate (19), the hinge II (7) is fixed on the bracket, and the hinge I (5) and the hinge II (7) are connected by a pin shaft (6).

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

4. The ignition guide tube assembly device for a liquid rocket engine according to claim 1, characterized in that: The bottom connection part of the slide seat (2) is in an inverted U shape and is mounted on the base (1) by means of bolts and nuts, so that fine adjustment along the width direction of the base can be achieved; the slide tube (4) and the slide seat (2) are clearance-matched and are fixed by means of fixing bolts (3), so that fine adjustment in the height direction can be achieved.

5. The ignition guide tube assembly device for a liquid rocket engine according to claim 1, characterized in that: The clamping ring (14) is composed of two half rings, and one of the half rings is provided with a rounded structure to press the product shell.

6. The ignition guide tube assembly device for a liquid rocket engine according to claim 1, characterized in that: The pressing plate (9) is provided with three grooves corresponding to the three positions of the nozzles on the product shell.

7. The ignition guide tube assembly device for a liquid rocket engine 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), the columns (13) and the support plate (19) are all made of hard aluminum 2A12, and weight-reducing holes are arranged on the positioning plate (15) and the support plate (19).

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

9. The ignition guide tube assembly device for a liquid rocket engine according to claim 1, characterized in that: A support shaft (10), a sleeve (11), a large nut (12), and a handle I (16) are assembled to form a component. The threaded section on the support shaft (10) is connected to the inner shell of the product. Two grooves are arranged on the sleeve (11), 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) can be rotated to drive the sleeve (11) to rotate, thereby realizing the circumferential rotation of the inner shell of the product.

10. The ignition guide tube assembly device for a liquid rocket engine according to claim 1, characterized in that: A through hole is processed on the upper part of the sleeve (20), and a groove is processed circumferentially on the lower part of the support shaft (10). The screw (17) passes through the through hole on the sleeve and is inserted into the groove of the support shaft to achieve fixed connection between the support shaft (10) and the sleeve (20).

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