A single-component liquid rocket engine assembly aid and method

Abstract

The application relates to the technical field of liquid rocket engine assembly, in particular to an auxiliary device and an assembly method for single-component liquid rocket engine assembly. The auxiliary device comprises a rack, a placing table is installed on the rack, the placing table is horizontally arranged and used for placing an engine; a plurality of supporting rods are inserted into the inner cavity of an injection pipe, clamping units are arranged on the supporting rods, the clamping units are connected with the inner cavity wall of the injection pipe and used for fixing the injection pipe; a driving unit is installed on the rack and used for making the supporting rods oppositely arranged with assembly holes on the engine; a pressing unit is connected with the rack, the pressing unit is located above the supporting rods and can be connected with the clamping units so that the supporting rods move towards the assembly holes on the engine. The application has the effects that the supporting rods can be used to avoid the bending of the injection pipe and prevent the tail of the injection pipe from being wound in the assembly process, and the assembly quality of the rocket engine is improved in general.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid rocket engine assembly, in particular to an auxiliary device for single-element liquid rocket engine assembly and an assembly method. BACKGROUND

[0002] Single-element engines have the characteristics of simple system composition, high single-machine working reliability, etc., and are currently widely used in attitude control power systems in the fields of satellites, carriers, missiles and weapons. Due to the large variety of single-element engine thrust, the large-scale automatic production line mode is not suitable for its processing and assembly, and personnel operate manually, which is low in production efficiency, and the manual assembly process is prone to damage to parts.

[0003] The prior art discloses an adjustable assembly device for liquid rocket engine rotor assembly, which comprises a main support, a lifter, a speed reducer, a bearing box, a clamp, an upper tool adapter A, a lower tool adapter B, a top rod and a wheel. The lifter is composed of an inner rod and an outer cylinder, and the inner rod and the outer cylinder are connected by threads. A handle is installed on the rotating inner rod. The lifter is fixed on the center of the bottom surface of the main support by bolts. The speed reducer is of a worm and gear structure and has a self-locking function. The clamp can be locked at any angle. The speed reducer is fixed on the right end column of the main support by bolts. The bearing box is fixed on the left end column of the main support by bolts. The speed reducer and the bearing box are coaxial. The clamp has a two-flap structure and is fixed by bolts after being closed. The upper tool adapter A is fixed in the middle of the clamp by positioning screws. The lower tool adapter B is fixed on the top of the lifter by positioning screws. The top rod is screwed on the nut welded on the center of the bottom edge of the main support. The wheel is fixed on the bottom edge corner of the main support by bolts.

[0004] In the related art, during assembly using the above device, a large number of injection pipes need to be installed during assembly, which is prone to misassembly of the injection pipes, causing the ends of the injection pipes to be entangled with each other. When the length of the injection pipe increases, the injection pipe will also be bent during assembly, affecting the assembly quality of the rocket engine. SUMMARY

[0005] In order to improve the assembly quality of the rocket engine, the present application provides an auxiliary device for single-element liquid rocket engine assembly and an assembly method.

[0006] The auxiliary device for single-element liquid rocket engine assembly and the assembly method provided by the present application adopt the following technical solutions:

[0007] In a first aspect, the present application provides an auxiliary device for single-element liquid rocket engine assembly, comprising

[0008] A rack is provided with a placing table horizontally arranged for placing the engine;

[0009] A plurality of support rods are inserted into the inner cavity of the injection pipe, and a clamping unit is arranged on the support rods, which is connected with the inner cavity wall of the injection pipe for fixing the injection pipe;

[0010] A driving unit is arranged on the rack and connected with the support rods for aligning the support rods with the assembly holes on the engine;

[0011] A pressing unit is connected with the rack and located above the support rods, which can be connected with the clamping unit to move the support rods towards the assembly holes on the engine.

[0012] According to the above technical scheme, the engine is first placed on the placing table, then the injection pipe is sleeved on the support rods, and the clamping unit is adjusted to relatively fix the injection pipe and the support rods, then the working state of the driving unit is controlled to move the support rods until all the support rods are aligned with the assembly holes on the engine, and then the pressing unit is started to apply force to the clamping units on all the support rods, and the position of the support rods is controlled by the clamping units to move the support rods while inserting the injection pipe into the assembly holes on the engine, at this time the clamping unit releases the injection pipe, and the installation is completed. The auxiliary device for assembling the single-unit liquid rocket engine is designed, which is convenient to install the placing table through the rack, avoids the bending of the injection pipe through the support rods, prevents the tail of the injection pipe from being wound during the assembly process, fixes the injection pipe through the clamping unit, and realizes the assembly of the injection pipe in cooperation with the pressing unit, and automatically aligns the support rods and the assembly holes on the engine through the driving unit, thereby saving manpower and improving the assembly quality of the rocket engine as a whole.

[0013] In a specific embodiment, the clamping unit comprises

[0014] A piston disc is hollow and has an opening at the top, which is slidingly connected with the support rod and divides the inner cavity of the support rod into two chambers, and a safety valve is arranged on the piston disc;

[0015] A connecting rod is hollow and connected with the piston disc and communicates with the lower chamber of the piston disc, a switch valve is connected with the connecting rod, the connecting rod extends out of the support rod, and a tension spring is sleeved on the connecting rod, the other end of the tension spring being connected with the driving unit;

[0016] A plurality of elastic compression pads are connected with the support rod, and the elastic compression pads can abut against the inner cavity wall of the injection pipe after deformation and expansion.

[0017] By adopting the technical scheme, force is applied to the connecting rod, the connecting rod drives the piston disc to slide along the axial direction of the support rod, the piston disc moves toward the placement table side, and the air in the chamber below the piston disc is compressed at the same time, so that the elastic compression pad below the piston disc always abuts against the inner cavity wall of the injection pipe. When the pressure in the chamber below the piston disc is too high, the gas is discharged through the safety valve, so that the pressure in the chamber below the piston disc is kept basically constant. The piston disc moves at the same time, and the support rod moves toward the placement table side through friction until the support rod abuts against the engine. When the piston disc continues to move toward the placement table side, the assembly of the injection pipe is completed. After the assembly is completed, the on-off valve is adjusted, the chamber below the piston disc is communicated with the outside through the inner cavity of the connecting rod, and the piston disc is reset. The clamping unit is designed to facilitate the movement of the piston disc through the connecting rod, and the pressure in the chamber below the piston disc can be adjusted through the on-off valve. The inner cavity of the support rod is divided into two chambers through the piston disc, and the working state of the elastic compression pad is kept through the safety valve. The elastic compression pad facilitates the fixation of the injection pipe.

[0018] In a specific implementation, the driving unit comprises

[0019] A plurality of mounting blocks are connected with the connecting rod, and the tensile spring is connected with the mounting block.

[0020] A plurality of lateral moving members are connected with the mounting block, and are used to move the mounting block horizontally and in a first direction.

[0021] A longitudinal moving member is connected with the rack, and the longitudinal moving member can be connected with a plurality of the lateral moving members, and is used to move the lateral moving members horizontally and in a second opposite direction. The first direction and the second direction are arranged perpendicularly.

[0022] By adopting the technical scheme, the driving unit is designed, the sliding position of the support rod is facilitated through the mounting block, the tensile spring is fixed, the displacement of the mounting block in the horizontal direction is fully covered through the lateral moving member and the longitudinal moving member, and the position of the mounting block is opposite to the assembly hole on the engine.

[0023] In a specific implementation, the lateral moving member comprises

[0024] A cross rod is connected with the mounting block, and both ends of the cross rod are provided with electromagnets. The electromagnets can be magnetically attracted and fixed with the rack, so as to separate the cross rod from the longitudinal moving member.

[0025] An electric telescopic rod is mounted on the cross bar, and a piston rod of the electric telescopic rod is connected with the mounting block, and the piston rod of the electric telescopic rod is axially consistent with the long side direction of the cross bar.

[0026] By adopting the above technical scheme, the transverse moving piece is designed, the mounting block is facilitated to slide through the cross bar, and the electric telescopic rod is fixed, the mounting block is facilitated to slide along the long side direction of the cross bar through the electric telescopic rod, and the cross bar and the longitudinal moving piece can be separated through the electromagnet.

[0027] In one specific implementation, the longitudinal moving piece comprises

[0028] Two conveyors are arranged on opposite sides of the long side direction of the cross bar in parallel, the cross bar is located between the belt surface of the conveyor and the upper horizontal section of the rack, and the side of the cross bar away from the electromagnet can be arranged on the belt surface of the conveyor.

[0029] By adopting the above technical scheme, the longitudinal moving piece is designed, and the cross bar is facilitated to move through the friction force through the conveyor.

[0030] In one specific implementation, the pressing unit comprises

[0031] A pressing plate is arranged in parallel with the top wall of the placing table, and the pressing plate is located above the connecting rod;

[0032] A cylinder is connected with the rack, and a piston rod of the cylinder is connected with the pressing plate in perpendicular.

[0033] By adopting the above technical scheme, the pressing unit is designed, the pressing plate is facilitated to move towards or away from one side of the placing table through the cylinder, and the connecting rod is facilitated to be forced at the same time through the pressing plate.

[0034] In one specific implementation, a plurality of self-locking rollers are rotationally connected with the rack, the upper vertices of the plurality of self-locking rollers are located on the same horizontal plane, and the placing table is arranged on the self-locking rollers.

[0035] By adopting the above technical scheme, the self-locking roller is designed, the transverse movement of the placing table is facilitated, and the engine is facilitated to be placed on the placing table.

[0036] In the second aspect, the application provides an assembling method of a single-element liquid rocket engine, comprising

[0037] S1: engine fixing: placing the engine on the placing table and fixing the engine;

[0038] S2: Pre-fixing of injection pipe: The injection pipe is sleeved on the support rod, and the clamping unit is adjusted to relatively fix the injection pipe and the support rod;

[0039] S3: Positioning of support rod: The working state of the driving unit is controlled to move the support rod until all the support rods are aligned with the assembly holes on the engine;

[0040] S4: Installation of injection pipe: The pressing unit is started, the clamping unit on all the support rods is simultaneously forced by the pressing unit, and the position of the support rod is controlled by the clamping unit, so that the support rod moves while driving the injection pipe to insert into the assembly hole on the engine, at this time the clamping unit releases the injection pipe, and the installation is completed.

[0041] By adopting the above technical scheme, the bending of the injection pipe during assembly can be avoided by the support rod, and the pressing of all the support rods can be realized at one time by the pressing unit, thereby improving the assembly efficiency of the injection pipe. The automatic alignment of the support rod and the assembly hole on the engine can be realized by the driving unit, thereby saving manpower.

[0042] In summary, the present application includes at least one of the following beneficial technical effects:

[0043] 1. The auxiliary device for assembling single-unit liquid rocket engine is designed, the rack is convenient for installing the placement table, the support rod is convenient for avoiding the bending of the injection pipe and preventing the tail of the injection pipe from winding during assembly, the clamping unit is convenient for fixing the injection pipe and can cooperate with the pressing unit to realize the assembly of the injection pipe, the driving unit can realize the automatic alignment of the support rod and the assembly hole on the engine, thereby saving manpower, and the overall assembly quality of the rocket engine is improved.

[0044] 2. The auxiliary device for assembling single-unit liquid rocket engine is designed, the connecting rod is convenient for driving the piston disc to move and can cooperate with the switch valve to adjust the pressure of the chamber below the piston disc, the piston disc is convenient for dividing the inner cavity of the support rod into two chambers and cooperating with the safety valve to maintain the working state of the elastic compression pad, and the elastic compression pad is convenient for fixing the injection pipe.

[0045] 3. The auxiliary device for assembling single-unit liquid rocket engine is designed, the cross rod is convenient for sliding the mounting block and fixing the electric telescopic rod, the electric telescopic rod is convenient for driving the mounting block to slide along the long edge direction of the cross rod, and the electromagnet can realize the separation of the cross rod and the longitudinal moving piece. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 is a structural schematic diagram of the auxiliary device for assembling single-unit liquid rocket engine of the embodiment of the present application.

[0047] Figure 2 isFigure 1 A schematic view of a three-dimensional structure.

[0048] Figure 3 A schematic view of a part of Figure 2

[0049] Figure 4 A schematic view of a structure of a lateral moving piece in the embodiment of the application.

[0050] Figure 5 A schematic view of a part of Figure 2 A schematic view of a structure after adding a supporting rod and a clamping unit.

[0051] Figure 6 A schematic view of a part of Figure 5

[0052] Figure 7 A sectional view of Figure 6

[0053] Figure 8 A schematic view of a structure after adding a pressing unit. Figure 5 BRIEF DESCRIPTION OF THE DRAWINGS1, frame; 2, placing table; 3, supporting rod; 4, clamping unit; 41, piston disc; 42, safety valve; 43, connecting rod; 44, on-off valve; 45, tension spring; 46, elastic compression pad; 5, driving unit; 51, mounting block; 52, lateral moving piece; 521, crossbar; 522, electromagnet; 523, electric telescopic rod; 53, longitudinal moving piece; 531, conveying belt; 6, pressing unit; 61, pressing plate; 62, air cylinder; 7, self-locking roller.

[0054] DETAILED DESCRIPTION The application will be further described in detail below with reference to the accompanying drawings.

[0055] Figures 1-8 The application will be further described in detail below with reference to the accompanying drawings.

[0056] The embodiment of the application discloses an auxiliary device for assembling a single-element liquid rocket engine and an assembling method.

[0057] In a first aspect, the embodiment of the application discloses an auxiliary device for assembling a single-element liquid rocket engine.

[0058] With reference to Figure 1 The auxiliary device for assembling a single-element liquid rocket engine comprises a frame 1, a self-locking roller 7 and a placing table 2, the number of the self-locking rollers 7 is multiple, the upper vertices of the multiple self-locking rollers 7 are on the same horizontal plane, and the placing table 2 is arranged on the multiple self-locking rollers 7, so that the placing table 2 is horizontally arranged and can move in the horizontal direction under the action of the self-locking rollers 7, thereby facilitating the placement of the engine.

[0059] With reference to Figure 2 ​​​Further comprising a driving unit 5, the driving unit 5 comprises a mounting block 51, a transverse moving piece 52 and a longitudinal moving piece 53, the number of the mounting block 51 can be one or multiple, the number of the mounting block 51 in the application is multiple, the number of the transverse moving piece 52 is consistent with the number of the mounting block 51, the transverse moving piece 52 is connected with the mounting block 51, and is used for moving the mounting block 51 horizontally and in a first direction; the longitudinal moving piece 53 is connected with the transverse moving piece 52, and is used for moving the transverse moving piece 52 horizontally and in a second direction, and the first direction and the second direction are arranged vertically to realize full coverage of the mounting block 51 in the horizontal direction.

[0060] With reference to Figure 3 The longitudinal moving piece 53 comprises two conveying belts 531, the two conveying belts 531 are arranged in parallel on the rack 1, and the conveying belts 531 are located above the placing table 2, a spacing is left between the two conveying belts 531, and a mounting gap is left between the upper belt surface of the conveying belt 531 and the upper horizontal section of the rack 1.

[0061] With reference to Figure 4 In order to facilitate the connection and separation of the transverse moving piece 52 and the conveying belt 531, the transverse moving piece 52 comprises a crossbar 521, the crossbar 521 is arranged through the mounting block 51, and the crossbar 521 and the mounting block 51 are slidingly connected, and electromagnets 522 are embedded at both ends of the crossbar 521, and the electromagnets 522 are arranged on the side of the crossbar 521 away from the upper belt surface of the conveying belt, the electromagnets 522 are controlled through an electric control switch, and a sliding gap is left between the electromagnets 522 and the upper horizontal section of the rack 1, when the electric control switch is not turned on, the electromagnets 522 are powered off, the crossbar 521 is arranged on the conveying belt 531 under the action of its own gravity, and moves along the second direction with the operation of the conveying belt 531, after the electric control switch is turned on, the electromagnets 522 are magnetically fixed with the rack 1, the separation of the crossbar 521 and the conveying belt 531 is realized, and the position of the crossbar 521 is fixed.

[0062] With reference to Figure 4 In order to move the mounting block 51 in the first direction, i.e. the long side direction of the crossbar 521, the transverse moving piece 52 further comprises an electric telescopic rod 523, the rod body of the electric telescopic rod 523 is bolted with the crossbar 521, the piston rod of the electric telescopic rod 523 is bolted with the mounting block 51, and the axial direction of the piston rod of the electric telescopic rod 523 is consistent with the first direction; through the cooperation of the conveying belt 531, the electromagnets 522 and the electric telescopic rod 523, the position movement and fixation of the mounting block 51 are realized.

[0063] With reference to Figure 5 and Figure 6, in order to facilitate the reduction of the possibility of bending and winding of the injection pipe in the assembly process, it also includes a support rod 3, because multiple injection pipes need to be installed on the engine at the same time, the number of support rods 3 is multiple, the support rod 3 passes through the inner cavity of the injection pipe, and the support rod 3 is provided with a clamping unit 4, and the position of the injection pipe is fixed by the cooperation of the clamping unit 4 and the support rod 3.

[0064] Referring to Figure 7 , the clamping unit 4 includes a piston disc 41, a connecting rod 43 and an elastic compression pad 46, the support rod 3 is hollowly provided, and the top of the support rod 3 is provided with an opening, the piston disc 41 is coaxially arranged with the support rod 3, the piston disc 41 is slidably connected with the inner cavity wall of the support rod 3, and the piston disc 41 divides the inner cavity of the support rod 3 into two chambers, in order to keep the air pressure in the lower chamber of the piston disc 41 stable, a safety valve 42 is flange-connected to the piston disc 41, and the lower and upper chambers of the piston disc 41 are communicated after the safety valve 42 is opened.

[0065] Referring to Figure 7 , the connecting rod 43 is coaxially welded with the piston disc 41, and in order to facilitate the piston disc 41 to retreat along the axial direction of the support rod 3 away from the placing table 2, the connecting rod 43 is hollowly provided, and the inner cavity of the connecting rod 43 is communicated with the lower chamber of the piston disc 41, a switch valve 44 is flange-connected to the side wall of the connecting rod 43, the switch valve 44 is opened when the piston disc 41 retreats, at this time the lower chamber of the piston disc 41 is communicated with the outside, so that the piston disc 41 can be easily retreated, the connecting rod 43 passes through the mounting block 51 and is slidably connected with the mounting block 51, and the connecting rod 43 is arranged away from the cross rod 521, a tension spring 45 is sleeved on the connecting rod 43, the tension spring 45 is located below the mounting block 51, one end of the tension spring 45 is welded and fixed with the connecting rod 43, and the other end is welded and fixed with the bottom wall of the mounting block 51.

[0066] Referring to Figure 7 , in order to reduce the possibility of bending of the injection pipe, the number of elastic compression pads 46 is multiple, the multiple elastic compression pads 46 are distributed along the axial direction of the support rod 3, a plurality of through holes are formed on the support rod 3 along the axial direction thereof, the elastic compression pads 46 are used to block the through holes, and the elastic compression pads 46 are adhesively fixed with the support rod 3, when the piston disc 41 moves in the support rod 3 towards the side of the placing table 2, the elastic compression pads 46 can be tightly abutted with the inner cavity wall of the injection pipe after expansion, so as to fix the position of the injection pipe.

[0067] Referring to Figure 8, in order to facilitate the drive injection pipe towards the assembly hole on the engine movement to complete the assembly, also includes the press-in unit 6, the press-in unit 6 includes the press-in plate 61 and the cylinder 62, the cylinder body of the cylinder 62 is bolted with the rack 1, the piston rod of the cylinder 62 is vertically arranged with the plane where the top wall of the placing table 2 is located, and the piston rod of the cylinder 62 is vertically bolted with the press-in plate 61, the press-in plate 61 is above the connecting rod 43, the piston rod of the cylinder 62 drives the press-in plate 61 to move towards the side of the placing table 2, and then realizes the abutment with the connecting rod 43.

[0068] The implementation principle of the single-element liquid rocket engine assembly auxiliary device is as follows: first, the engine is placed on the placing table 2, then the injection pipe is sleeved on the support rod 3, the injection pipe is relatively fixed with the support rod 3 by adjusting the clamping unit 4, then the working state of the drive unit 5 is controlled to move the support rod 3 until all the support rods 3 are arranged opposite to the assembly holes on the engine, and then the press-in unit 6 is started to apply force to all the clamping units 4 on the support rods 3 and to the connecting rod 43, the connecting rod 43 drives the piston disc 41 to slide along the axial direction of the support rod 3, the piston disc 41 moves towards the side of the placing table 2, and at the same time, the air in the cavity below the piston disc 41 is compressed, so that the elastic compression pad 46 below the piston disc 41 always maintains the abutting state with the inner cavity wall of the injection pipe, when the pressure in the cavity below the piston disc 41 is too large, the gas is overflowed through the safety valve 42, so that the pressure in the cavity below the piston disc 41 is kept basically constant, the piston disc 41 moves at the same time to drive the support rod 3 to move towards the side of the placing table 2 until the injection pipe abuts against the engine, and continues to move towards the side of the placing table 2, so that the support rod 3 moves at the same time to drive the injection pipe to be inserted into the assembly hole on the engine, at this time, the piston disc 41 is below all the elastic compression pads 46, the elastic compression pad 46 retracts and releases the injection pipe, and the installation is completed.

[0069] In the second aspect, the application discloses a single-element liquid rocket engine assembly method, which comprises

[0070] S1: engine fixing: placing the engine on the placing table 2 and fixing it;

[0071] S2: injection pipe pre-fixing: sleeving the injection pipe on the support rod 3, and relatively fixing the injection pipe with the support rod 3 by adjusting the clamping unit 4;

[0072] S3: support rod 3 position alignment: controlling the working state of the drive unit 5 to move the support rod 3 until all the support rods 3 are arranged opposite to the assembly holes on the engine;

[0073] S4: injection pipe installation: the pressing unit 6 is started, the pressing unit 6 simultaneously applies force to the clamping units 4 on all support rods 3, and controls the position of the support rods 3 through the clamping units 4, so that the support rods 3 move at the same time to insert the injection pipe into the assembly hole on the engine, at this time the clamping units 4 release the injection pipe, and the installation is completed.

[0074] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An auxiliary device for assembling a single-component liquid rocket engine, characterized in that: include A frame (1) is provided, on which a placement platform (2) is mounted. The placement platform (2) is horizontally positioned and used to place the engine. Multiple support rods (3) are inserted into the inner cavity of the injection pipe, and a clamping unit (4) is provided on the support rod (3). The clamping unit (4) is connected to the inner wall of the injection pipe and is used to fix the injection pipe. A drive unit (5) is mounted on the frame (1) and connected to the support rod (3) so that the support rod (3) is aligned with the mounting hole on the engine. Press-in unit (6), the press-in unit (6) is connected to the frame (1), the press-in unit (6) is located above the support rod (3), and the press-in unit (6) can be connected to the clamping unit (4) so ​​that the support rod (3) moves toward the mounting hole on the engine; The clamping unit (4) includes The piston disc (41) is hollow and has an opening at the top. The piston disc (41) is slidably connected to the support rod (3) and divides the inner cavity of the support rod (3) into two chambers. A safety valve (42) is provided on the piston disc (41). A connecting rod (43) is hollow and connected to the piston disc (41) and communicates with the lower chamber of the piston disc (41). A switching valve (44) is connected to the connecting rod (43), and the connecting rod (43) extends out of the support rod (3). A tension spring (45) is sleeved on the connecting rod (43), and the other end of the tension spring (45) is connected to the drive unit (5). Multiple elastic compression pads (46) are connected to the support rod (3), and the elastic compression pads (46) can abut against the inner wall of the injection pipe after deformation and expansion; Control the working state of the drive unit (5) to move the support rods (3) until all the support rods (3) are aligned with the mounting holes on the engine. Then start the pressing unit (6). The pressing unit (6) simultaneously applies force to the clamping unit (4) on all the support rods (3) and to the connecting rod (43). The connecting rod (43) drives the piston disc (41) to slide along the axial direction of the support rods (3). The piston disc (41) moves toward the placement platform (2). While moving, it compresses the air in the chamber below the piston disc (41), so that the elastic pressure pad (46) below the piston disc (41) and the inner part of the injection pipe are aligned. The cavity wall remains in a tight state. When the pressure in the chamber below the piston disc (41) is too high, the gas overflows through the safety valve (42), so that the pressure in the chamber below the piston disc (41) remains basically constant. While the piston disc (41) moves, it drives the support rod (3) to move towards the side of the placement platform (2) through friction until the injection pipe comes into contact with the engine. It continues to move towards the side of the placement platform (2), so that while the support rod (3) moves, it drives the injection pipe to insert into the mounting hole on the engine. At this time, the piston disc (41) is located below all the elastic pressure pads (46). The elastic pressure pads (46) retract and release the injection pipe.

2. The auxiliary device for assembling a single-component liquid rocket engine according to claim 1, characterized in that: The drive unit (5) includes Multiple mounting blocks (51), through which the connecting rod (43) passes and is slidably connected to the mounting blocks (51), and the tension spring (45) is connected to the mounting blocks (51); Multiple lateral moving parts (52) are connected to the mounting block (51) for moving the mounting block (51) horizontally and along a first direction; A longitudinal moving member (53) is connected to the frame (1) and can be connected to a plurality of the transverse moving members (52) for making the transverse moving members (52) move horizontally and in a second opposite direction, and the first direction and the second direction are perpendicular to each other.

3. The auxiliary device for assembling a single-component liquid rocket engine according to claim 2, characterized in that: The lateral moving part (52) includes A crossbar (521) is provided, and the mounting block (51) is slidably connected to the crossbar (521). Both ends of the crossbar (521) are provided with electromagnets (522). The electromagnets (522) can be magnetically fixed to the frame (1) to achieve separation of the crossbar (521) from the longitudinal moving part (53). An electric telescopic rod (523) is installed on the crossbar (521), and the piston rod of the electric telescopic rod (523) is connected to the mounting block (51). The axial direction of the piston rod of the electric telescopic rod (523) is consistent with the long side direction of the crossbar (521).

4. The auxiliary device for assembling a single-component liquid rocket engine according to claim 3, characterized in that: The longitudinal moving member (53) includes Two conveyor belts (531) are arranged in parallel on opposite sides of the long side of the crossbar (521). The crossbar (521) is located between the belt surface of the conveyor belt (531) and the upper horizontal section of the frame (1), and the side of the crossbar (521) away from the electromagnet (522) can be placed on the belt surface of the conveyor belt (531).

5. The auxiliary device for assembling a single-component liquid rocket engine according to claim 1, characterized in that: The pressing unit (6) includes A pressing plate (61) is arranged parallel to the top wall of the placement platform (2), and the pressing plate (61) is located above the connecting rod (43); A cylinder (62) is connected to the frame (1), and the piston rod of the cylinder (62) is perpendicularly connected to the press plate (61).

6. The auxiliary device for assembling a monocomponent liquid rocket engine according to claim 1, characterized in that: Multiple self-locking rollers (7) are rotatably connected to the frame (1), with the upper apex of the multiple self-locking rollers (7) on the same horizontal plane, and the placement platform (2) is placed on the self-locking rollers (7).

7. An assembly method for a single-component liquid rocket engine, characterized in that: The auxiliary device for assembling a monocomponent liquid rocket engine as described in any one of claims 1-6 includes... S1: Engine fixing: Place the engine on the placement platform (2) and fix it in place; S2: Pre-fixing of injection pipe: The injection pipe is sleeved on the support rod (3), and the injection pipe is fixed relative to the support rod (3) by adjusting the clamping unit (4); S3: Position alignment of support rods (3): Control the working state of the drive unit (5) to move the support rods (3) until all support rods (3) are aligned with the mounting holes on the engine; S4: Injection pipe installation: The pressing unit (6) is started. The pressing unit (6) applies force to the clamping unit (4) on all the support rods (3) at the same time, and controls the position of the support rods (3) through the clamping unit (4) so ​​that the support rods (3) move while driving the injection pipe to be inserted into the assembly hole on the engine. At this time, the clamping unit (4) releases the injection pipe and the installation is completed.

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