A liquid rocket engine turnover tool

Abstract

The application discloses a liquid rocket engine overturning tool, which comprises a crossbeam, a lifting hook and two symmetrical fixing frames, wherein the lifting hook is hung in the middle of the crossbeam and is used for lifting the engine, and the two fixing frames are hung at the two ends of the crossbeam and are used for fixing the engine from both sides. The application solves the problems that the existing liquid rocket engine lifting tool cannot satisfy single-point lifting, lifting point position adjustment and large-angle overturning, and meets the angle requirement when the liquid rocket engine is connected with a test bench.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of liquid rocket engines, and particularly relates to a liquid rocket engine turnover tool. BACKGROUND

[0002] A liquid rocket engine is usually composed of a turbine pump, valves, a combustion device, general assembly elements and pipes of various diameters. The engine pipes are usually arranged outside the turbine pump, valves and combustion device. The liquid rocket engine has a complex structure, an irregular outer shape and a large weight. There is a certain error between the actual weight and the theoretical weight of each component of the engine, and a certain deviation between the actual center of mass of the engine and the theoretical center of mass after the components are assembled into the engine. In addition, the state of a newly developed engine changes with the development process, and the center of mass of the engine in each state is quite different. If a turnover lifting tool is designed for each engine in each state, resources are wasted, and the problem of the uncertain center of mass of the engine cannot be solved.

[0003] The liquid rocket engine is usually assembled in a vertical state in an assembly workshop, needs to be turned over into a horizontal state and transported to an engine test station, and then turned over into a vertical state or other angle state by using a turnover tool according to the inclination angle of the test station after reaching the test station, and then connected to the test station. Due to the size limitation of the test station, only one overhead crane is provided in the test station, so that the engine can only be lifted by a single point during turnover, which is extremely harsh for the lifting point position of the turnover lifting tool.

[0004] The irregular shape of the engine, the deviation of the center of mass of the engine and the size limitation of the test station make the engine turnover process extremely complex. If an unsuitable tool is used, the engine is difficult to maintain a balanced state during lifting and turnover, is easy to tilt, is difficult to connect to the test station, and even the engine is easy to roll over, causing serious consequences of engine damage. SUMMARY

[0005] The technical problem solved by the application is to overcome the shortcomings of the prior art, provide a liquid rocket engine turnover tool, solve the problems that the existing liquid rocket engine lifting tool cannot meet single-point lifting, the lifting point position is adjustable and large-angle turnover cannot be realized, and meet the angle requirement when the liquid rocket engine is connected to the test station.

[0006] The application is achieved by the following technical scheme: a liquid rocket engine turnover tool, comprising a cross beam, a lifting hook and two symmetrical fixed frames; wherein the lifting hook is arranged in the middle of the cross beam and used for lifting the engine, and the two fixed frames are arranged at the two ends of the cross beam and used for fixing the engine from both sides.

[0007] The liquid rocket engine turnover tool comprises a fixed frame, a side beam and an angle adjuster, wherein the fixed frame is connected with the side beam on the side away from the lifting direction of the lifting hook, and is used for fixing the engine; the angle adjuster is connected with the side beam, and can be deflected relative to the side beam; the angle adjuster is in a U-shaped structure, two arms of the U-shaped structure are respectively arranged on the two sides of the side beam, and the U-shaped structure satisfies the formula: h≥2Rsinθ max , wherein θ max is the maximum single-side deflection angle of the angle adjuster relative to the side beam, h is the height of the side beam, and R is the deflection radius of the U-shaped structure relative to the side beam.

[0008] In the liquid rocket engine turnover tool, the side beam comprises a side beam frame and a side beam shaft, wherein the side beam shaft can move in the extension direction of the side beam in the side beam frame.

[0009] In the liquid rocket engine turnover tool, the angle adjuster is connected with the side beam through a mounting piece, wherein the mounting piece passes through a mounting through hole on the side beam frame and a guide hole on the side beam shaft, and the mounting piece can move in the guide hole in the extension direction of the side beam.

[0010] In the liquid rocket engine turnover tool, a plurality of mounting through holes are arranged on the side beam frame in the extension direction of the side beam, and the side beam shaft is provided with a plurality of guide holes arranged opposite to the mounting through holes.

[0011] The liquid rocket engine turnover tool further comprises a first distance adjusting fixing piece, a second distance adjusting fixing piece and a first lead screw, wherein the first distance adjusting fixing piece is fixed on the side of the side beam frame away from the clamping part, the second distance adjusting fixing piece is fixed on the side of the side beam shaft away from the clamping part, the first lead screw passes through the first distance adjusting fixing piece and the second distance adjusting fixing piece in the extension direction of the side beam, and the second distance adjusting fixing piece is used for rotating relative to the first lead screw to push the relative movement of the side beam shaft and the side beam frame.

[0012] The first lead screw comprises a first protruding part, wherein the first protruding part and the first distance adjusting fixing piece are respectively fixed on the inner and outer sides of the side beam frame.

[0013] The first lead screw further comprises a second protruding part, wherein the first distance adjusting fixing piece is clamped between the side beam frame and the second protruding part.

[0014] In the liquid rocket engine turnover tool, the cross beam comprises a cross beam frame, a cross beam adjuster and a second lead screw, wherein the cross beam adjuster is arranged on the cross beam frame and fixedly connected with the lifting hook; the cross beam frame is provided with a third distance adjusting fixing part and a fourth distance adjusting fixing part, the third distance adjusting fixing part and the fourth distance adjusting fixing part are symmetrically arranged on the two sides of the cross beam adjuster; the second lead screw is fixed on the cross beam adjuster, and the second lead screw passes through the third distance adjusting fixing part and the fourth distance adjusting fixing part, and the second lead screw rotates relative to the third distance adjusting fixing part and the fourth distance adjusting fixing part to push the cross beam adjuster to slide relative to the cross beam frame.

[0015] In the liquid rocket engine turnover tool, the cross beam adjuster is provided with a through hole for lifting.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] (1) The present application designs a tool suitable for single-point lifting of a liquid rocket engine, adjustable center of mass of a lifting appliance, and meets the requirements of large-angle turnover, which adopts a combination structure of an upper cross beam, a fixed frame, an adjuster and a chain. The structure can ensure the safety and reliability of the engine during the turnover process;

[0018] (2) The angle adjuster is arranged in a U-shaped structure, and the size of the U-shaped structure is associated with the size of the side beam, which is beneficial to reasonably control the deflection angle of the angle adjuster, and is beneficial to avoid the possibility of U-shaped structure and measurement interference during the engine turnover process;

[0019] (3) The tool of the present application adopts the relative movement mode of shaft and frame, which is beneficial to provide lifting stability during the adjustment of the center of mass. In addition, the shaft and frame movement mode can provide a mounting platform for more components, so that the tool can realize relatively complete and stable lifting function. For example, a plurality of guide holes can be arranged on the shaft frame to adapt to liquid rocket engines of various sizes;

[0020] (4) The present application provides a more visually convenient adjustment method by adjusting the center of mass from the side away from the clamping;

[0021] (5) The distance adjusting fixing parts are symmetrically arranged on the cross beam, which is beneficial to avoid the cross beam from being subjected to unbalanced load and affecting the service life of the tool. BRIEF DESCRIPTION OF DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to limit the present application thereto, as the present application can have application in forms other than those illustrated. Further, like reference numerals have been used throughout the drawings to denote like elements. In the drawings:

[0023] Figure 1 is a structural diagram of a liquid rocket engine turnover tool provided by an embodiment of the present application;

[0024] Figure 2 is a structural diagram of a cross beam provided by an embodiment of the present application;

[0025] Figure 3 is a structural diagram of a fixed frame provided by an embodiment of the present application;

[0026] Figure 4 is a partial structural diagram of a fixed frame provided by an embodiment of the present application. DETAILED DESCRIPTION

[0027] Exemplary embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the present disclosure are shown. This present disclosure may, however, be embodied in various forms without being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the present disclosure to those skilled in the art. It will be understood that the embodiments of the present application and the features of the embodiments are combinable, if not contradictory, and will be described in detail with reference to the accompanying drawings and the embodiments. The present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the present disclosure are shown.

[0028] Figure 1 is a structural diagram of a liquid rocket engine turnover tool provided by an embodiment of the present application. As shown in Figure 1 , the liquid rocket engine turnover tool includes a cross beam 1, a lifting hook 2 and two fixed frames 3 symmetrically arranged. The lifting hook 2 is hung in the middle of the cross beam 1, and is used to lift the engine from the position opposite the middle. The two fixed frames 3 are hung at the two ends of the cross beam 1, respectively, and are used to fix the engine from both sides.

[0029] The specific structure of the cross beam 1 will be described in detail below in combination with Figure 1 and Figure 2 .

[0030] The crossbeam 1 can include a crossbeam frame 11 and a crossbeam adjuster 12, which is arranged on the crossbeam frame 11 and can move along the extension direction of the crossbeam frame 1 relative to the crossbeam frame 11. The crossbeam adjuster 12 is also fixedly connected with the lifting hook 2, so as to change the fixed connection position of the lifting hook 2 with the crossbeam 1, and realize the adjustment and alignment of the center of mass in the extension direction of the crossbeam frame 1. A through hole 16 for lifting is arranged on the crossbeam adjuster 12, so that the entire tooling (including the engine) can be lifted through the through hole 16, and single-point lifting is realized.

[0031] The crossbeam frame 11 can be provided with a distance adjusting fixing part 13 and a distance adjusting fixing part 14, which are symmetrically arranged on both sides of the crossbeam adjuster 12. Figure 2 In the embodiment shown, the distance adjusting fixing parts 13 and 14 can be fixed below the crossbeam frame 11, i.e. arranged facing the engine. The crossbeam 1 can also include a lead screw 15. The lead screw 15 can be fixed to the crossbeam adjuster 12 and pass through the distance adjusting fixing parts 13 and 14. When the lead screw 15 rotates relative to the distance adjusting fixing parts 13 and 14, the distance adjusting fixing parts 13 and 14 can move axially relative to the lead screw due to the screw propulsion principle, thereby pushing the crossbeam adjuster 12 to slide relative to the crossbeam frame 11.

[0032] The side of the crossbeam frame 11 close to the engine is provided with an elongated sliding block 18 for moving in the groove of the guide block 17 on the crossbeam adjuster 12. In this way, the wear of the tooling caused by sliding friction can be reduced.

[0033] The specific structure of the fixed frame 3 will be described in detail below in combination with Figure 1 , Figure 3 and Figure 4 .

[0034] The fixed frame 3 includes a clamping part 31, a side beam 32 and an angle adjuster 33.

[0035] The clamping part 31 is fixedly connected with the side beam 32 on the side away from the lifting direction of the lifting hook 2, and is used for fixing the engine. The interface on the clamping part 31 for interfacing with the engine can be adapted to the mounting interface on the engine. The side of the clamping part 31 facing the engine can be concave, and the clamping part 31 can have a cavity part, which can be used to provide accommodation space for the peripheral components of the engine.

[0036] The side beam 32 includes a side beam frame 34 and a side beam shaft 35, which is movable in the extension direction of the side beam 32 within the side beam frame 34. The angle adjuster 33 is mounted to the side beam 32, and can be deflected relative to the side beam 32, and is used for aligning with the center of mass of the engine.

[0037] Specifically, the angle adjuster 33 is mounted to the side beam 32 through a mounting member 36. As shown in Figure 3 In the process of aligning the engine with the center of mass, the mounting member 36 first passes through the mounting through hole on the side beam frame 34 and the guide hole 37 on the side beam shaft 35, and is not locked, so that the mounting member 36 can move in the extension direction of the side beam 32 in the guide hole 37, thereby causing the side beam frame 34 and the side beam shaft 35 to move relatively. After aligning the center of mass, the mounting member 36 is locked to constrain the side beam frame 34 and the side beam shaft 35 from moving relatively. In addition, the locked mounting member 36 does not affect the deflection of the angle adjuster 33.

[0038] In the extension direction of the side beam 32, a plurality of mounting through holes are arranged on the side beam frame 34, and the side beam shaft 35 is provided with a plurality of guide holes 37 arranged opposite to the mounting through holes. Different mounting through holes and corresponding guide holes 37 can be selected for engines of different sizes, so that the tooling provided by the embodiments of the present application can have higher adaptability.

[0039] In some embodiments provided by the present application, the relative movement of the side beam frame 34 and the side beam shaft 35 can be driven on the side away from the clamping part 31. As shown in Figure 4 The tooling further includes a distance adjusting fixing member 41 and a distance adjusting fixing member 42, the distance adjusting fixing member 41 is fixed on the side of the side beam frame 34 away from the clamping part 31, and the distance adjusting fixing member 42 is fixed on the side of the side beam shaft 35 away from the clamping part 31; the tooling further includes a lead screw 43, the lead screw 43 passes through the distance adjusting fixing member 41 and the distance adjusting fixing member 42 in the extension direction of the side beam 32.

[0040] In the embodiment shown in Figure 3 Specifically, the lead screw 43 has a protruding part 44 and a protruding part 45, the protruding part 44 and the distance adjusting fixing member 41 are respectively fixed on the inner and outer sides of the side beam frame 34, and the distance adjusting fixing member 41 is clamped between the side beam frame 34 and the protruding part 45. When the lead screw 43 rotates and tends to move towards the clamping part 31, the protruding part 45 and the distance adjusting fixing member 41 can block the lead screw 43 from moving towards the clamping part 31. When the lead screw 43 rotates and tends to move towards the clamping part 31, the protruding part 44 can block the lead screw 43 from moving towards the clamping part 31.

[0041] When the distance adjusting fixing member 42 rotates relative to the lead screw 43, since one end of the lead screw 43 can be fixed on the side beam frame 34, the distance adjusting fixing member 42 can move axially on the lead screw 43, thereby pushing the side beam shaft 35 relative to the side beam frame 34.

[0042] To meet the large-angle overturning, the angle adjuster 33 can include a U-shaped structure, and two arms of the U-shaped structure are respectively mounted to the two sides of the side beam 32. By designing the size of the U-shaped structure, the deflection stroke of the angle adjuster 33 can be flexibly adjusted. As shown inFigure 3 As shown, the U-shaped structure satisfies: h >= 2Rsintheta max . Wherein, theta max is the maximum single-side deflection angle of the angle adjuster 33 relative to the side beam 32, h is the height of the side beam 32, and R is the deflection radius of the U-shaped structure relative to the side beam 32.

[0043] In some embodiments, a reinforcing rib 38 is arranged between the side beam shaft 35 and the clamping portion 31. The reinforcing rib 38 is used to avoid the possibility of breakage at the connection between the side beam shaft 35 and the clamping portion 31. As shown, the spacing distance d1 between the reinforcing rib 38 and the side beam 32 is greater than or equal to the moving stroke d2 of the mounting member 36 within the guide hole 37 away from the clamping portion 31, so that the reinforcing rib 38 does not interfere with the relative movement of the side beam frame 34 and the side beam shaft 35. Figure 3

[0044] In some embodiments, two sliding gaps are symmetrically arranged on the upper and lower sides of the side beam shaft 35 and the side beam frame 34. On the side of the side beam frame 34 facing the side beam shaft 35, a plurality of guide blocks are arranged in the sliding gaps. On the side of the side beam shaft 35 facing the side beam frame 34, a long strip-shaped sliding block is arranged for moving within the grooves of the plurality of guide blocks.

[0045] In some embodiments, the side beam shaft 35 passes through the clamping portion 31 and is fixedly connected with the clamping portion 31 by welding. Thus, stable fixation of the side beam shaft 35 and the clamping portion 31 can be achieved, and the process is relatively easy to implement.

[0046] The present application designs a tooling suitable for single-point lifting of a liquid rocket engine, adjustable center of mass of a lifting appliance, and satisfying large-angle overturning, which adopts a combined structure of an upper cross beam, a fixed frame, an adjuster, and a chain. The tooling can satisfy the requirements of engine overturning with deviation of the center of mass, and can ensure safety and reliability of the engine during overturning. The present application sets the angle adjuster in a U-shaped structure, and associates the size of the U-shaped structure with the size of the side beam, which is beneficial to reasonably control the deflection angle stroke of the angle adjuster and avoid the possibility of interference between the U-shaped structure and measurement during engine overturning. The tooling of the present application adopts a relative movement mode of shaft and frame, which is beneficial to providing lifting stability during adjustment of the center of mass. In addition, the shaft and frame movement mode can provide a mounting platform for more components, so that the tooling can realize relatively complete and stable lifting function. For example, a plurality of guide holes can be arranged on the shaft and frame to adapt to engines of various sizes. The present application drives adjustment of the center of mass from the side away from the clamping, which provides a more visually convenient adjustment mode. The present application symmetrically arranges distance adjusting fixing members on the cross beam, which is beneficial to avoiding unbalanced loading of the cross beam and affecting the service life of the tooling.

[0047] ​Although the present application has been disclosed with reference to the preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications to the technical solutions of the present application using the disclosed methods and technical contents without departing from the spirit and scope of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical solutions of the present application shall fall within the protection scope of the technical solutions of the present application.

Claims

1. A liquid rocket engine flipping fixture, characterized in that... include: A crossbeam (1), a hook (2), and two symmetrically arranged fixed frames (3); among which, The hook (2) is suspended in the middle of the crossbeam (1) for lifting the engine; the two fixing frames (3) are respectively suspended at both ends of the crossbeam (1) for fixing the engine from both sides; The fixing frame (3) includes a clamping part (31), a side beam (32), and an angle adjuster (33); wherein, the clamping part (31) is fixedly connected to the side beam (32) away from the lifting direction of the hook (2) for fixing the engine; the angle adjuster (33) is connected to the side beam (32) and the angle adjuster (33) can deflect relative to the side beam (32); The angle adjuster (33) is a U-shaped structure, with its two arms mounted on both sides of the side beam (32). The U-shaped structure satisfies the following condition: h ≥ 2Rsinθ max , where θ max h is the maximum single-sided deflection angle of the angle adjuster (33) relative to the side beam (32), h is the height of the side beam (32), and R is the deflection radius of the U-shaped structure relative to the side beam (32). The side beam (32) includes a side beam frame (34) and a side beam shaft (35), wherein the side beam shaft (35) is movable within the side beam frame (34) along the extension direction of the side beam (32); The angle adjuster (33) is connected to the side beam (32) via a mounting member (36), wherein the mounting member (36) passes through a mounting through hole on the side beam frame (34) and a guide hole (37) on the side beam shaft (35), and the mounting member (36) is movable within the guide hole (37) along the extension direction of the side beam (32); wherein the mounting member (36) is a bolt.

2. The liquid rocket engine flipping fixture according to claim 1, characterized in that: In the extending direction of the side beam (32), the side beam frame (34) is provided with a plurality of mounting through holes, and the side beam shaft (35) is provided with a plurality of guide holes (37) that are opposite to the mounting through holes.

3. The liquid rocket engine flipping fixture according to claim 1, characterized in that... It also includes: a first adjusting clamp (41), a second adjusting clamp (42), and a first lead screw (43); wherein, The first adjusting fixing member (41) is fixed to the side of the side beam frame (34) away from the clamping part (31), and the second adjusting fixing member (42) is fixed to the side of the side beam shaft (35) away from the clamping part (31); The first lead screw (43) passes through the first adjusting member (41) and the second adjusting member (42) along the extension direction of the side beam (32). The second adjusting member (42) is used to rotate relative to the first lead screw (43) to push the relative movement of the side beam shaft (35) and the side beam frame (34).

4. The liquid rocket engine flipping fixture according to claim 3, characterized in that: The first lead screw (43) includes a first protrusion (44), wherein the first protrusion (44) and the first adjusting fastener (41) are respectively fixed on the inner and outer sides of the side beam frame (34).

5. The liquid rocket engine flipping fixture according to claim 4, characterized in that: The first lead screw (43) also includes a second protrusion (45), wherein the first adjusting fastener (41) is clamped between the side beam frame (34) and the second protrusion (45).

6. The liquid rocket engine flipping fixture according to claim 1, characterized in that: The crossbeam (1) includes a crossbeam frame (11), a crossbeam adjuster (12), and a second lead screw (15), wherein, The beam adjuster (12) is mounted on the beam frame (11) and is fixedly connected to the hook (2); The crossbeam frame (11) is provided with a third adjusting fastener (13) and a fourth adjusting fastener (14), which are symmetrically arranged on both sides of the crossbeam adjuster (12). The second lead screw (15) is fixed to the beam adjuster (12) and passes through the third adjusting member (13) and the fourth adjusting member (14). The second lead screw (15) rotates relative to the third adjusting member (13) and the fourth adjusting member (14) to push the beam adjuster (12) to slide relative to the beam frame (11).

7. The liquid rocket engine flipping fixture according to claim 6, characterized in that: The beam adjuster (12) is provided with a through hole (16) for lifting.

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