A locking type liquid rocket engine test bench based on lightweight design

Abstract

The application discloses a locking type liquid rocket engine test bench based on light weight design, the bench is fixedly installed on the ground or in a pit, support one, support two, support three, support four, support five, support six, support seven and support eight are installed below a flat plate, platform support one and platform support two are installed above the flat plate, a platform is installed above the platform support one and the platform support two, and a mounting plate for connecting the liquid rocket engine is installed above the platform through a mounting plate adapter platform. The application has the advantages that the liquid rocket engine can move along with the test bench, the mounting plate adapter platform and the platform can be locked, and the liquid rocket engine can be subjected to hot test at different positions on the platform.

Description

Technical Field

[0001] This invention relates to a test bench, and more particularly to a lock-up liquid rocket engine test bench based on a lightweight design, belonging to the field of attitude control propulsion system technology. Background Technology

[0002] Liquid rocket engine test benches provide a place for ignition and thrust measurement of liquid rocket engines. Traditional liquid rocket engine test benches have fixed positions for hot-fire testing, which cannot meet the requirements for conducting hot-fire tests of liquid rocket engines at different locations on the test bench. A new type of liquid rocket engine test bench needs to be designed that can meet the strength requirements of liquid rocket engine testing, allow the liquid rocket engine to move on the test bench, and then be fixed in place, so that the liquid rocket engine can be hot-fire tested at different locations on the test bench.

[0003] Traditional liquid rocket engine test benches are bulky, large in size, and have low material utilization. The installation process is also very laborious. It is necessary to reduce the structural weight of the liquid rocket engine test bench by designing force transmission paths that affect the overall structural working conditions. By reconstructing the test bench model through the force transmission paths during the liquid rocket engine test process, a high-strength test bench model based on lightweight design is obtained, which reduces the overall weight of the test bench and improves its overall rigidity.

[0004] The invention patent with application number 2012102912366 and application name, entitled "A High-Precision Thrust Test Stand for Liquid or Gas Rocket Engines", discloses a thrust test stand that arranges the propellant supply pipeline and measurement line pipeline of the engine into three sections to realize the installation and testing of rocket engines.

[0005] The utility model patent with application number 2019207073389 and application title "A Test Device for a Liquid Rocket Propulsion System" discloses a test device for a rocket propulsion engine system, which is used to test the rocket propulsion system.

[0006] All of the above test platforms are fixed platforms, which can only be applied to specific scenarios and specific power systems, and are not universally applicable.

[0007] Therefore, a new type of liquid rocket engine test rig is needed that is lightweight, easy to install, and has a movable hot-fire test position to meet the requirements. Summary of the Invention

[0008] To address the shortcomings of existing technologies and solve the problem of test design for attitude control propulsion system engines, a lock-up liquid rocket engine test bench based on lightweight design is proposed. This solves the problems of traditional liquid rocket engine test benches, such as the inability to move the position of the liquid rocket engine during hot testing, the bulky and large structure of the test bench, low material utilization, and the extremely laborious installation process.

[0009] This lightweight, locked liquid rocket engine test rig is fixedly installed on the ground or in a pit. Supports 1, 2, 3, 4, 5, 6, 7, and 8 are installed below the flat plate. Platform support 1 and platform support 2 are installed above the flat plate. The platform is installed above platform support 1 and platform support 2. The mounting plate for connecting the liquid rocket engine is connected to the platform and installed above the platform.

[0010] Further optimization is achieved by having both bracket 1 and bracket 2 be L-shaped. The bottom edge of the front plate 1 of bracket 1 is connected to or integrally formed with the base plate 1, and the side edge of the front plate 1 is connected to or integrally formed with the side plate 1. The bottom edge of the front plate 2 of bracket 2 is connected to or integrally formed with the base plate 2, and the side edge of the front plate 2 is connected to or integrally formed with the side plate 2. The base plate 1 and base plate 2 are provided with connection holes for fixed connection with the ground or pit. The front plate 1 and side plate 1 are provided with topology optimization holes, and the edge of the side plate 1 is flush with the edge of the topology optimization hole of the front plate 1. The front plate 2 and side plate 2 are provided with topology optimization holes, and the edge of the side plate 2 is flush with the edge of the topology optimization hole of the front plate 2.

[0011] Further optimization is achieved by connecting or integrally forming the bottom edge of the front plate three of the bracket three with the bottom plate three, connecting or integrally forming the side edge of the front plate three with the side plate three, and forming the side plate three in a Y shape. Similarly, connecting or integrally forming the bottom edge of the front plate four of the bracket four with the bottom plate four, connecting or integrally forming the side edge of the front plate four with the side plate four, and forming the side plate four in a Y shape. Topology optimization holes are provided on both the front plate three and the front plate four.

[0012] Further optimization is achieved by connecting or integrally forming the bottom edge of the front plate five of the bracket five with the base plate five, and connecting or integrally forming the side edge of the front plate five with the side plate five. Similarly, connecting or integrally forming the bottom edge of the front plate six of the bracket six with the base plate six, and connecting or integrally forming the side edge of the front plate six with the side plate six. The base plate five and the base plate six are provided with connection holes for fixed connection with the ground or pit. The front plate five and the side plate five are provided with topology optimization holes. The connection or transition between the side plate five and the front plate five is provided with equal stress weight reduction windows. The front plate six and the side plate six are provided with topology optimization holes. The connection or transition between the side plate six and the front plate six is ​​provided with equal stress weight reduction windows.

[0013] Further optimization is achieved by having both bracket 7 and bracket 8 be L-shaped, with the bottom edge of the front side plate 7 connected to or integrally formed with the base plate 7, and the base plate 7 having connection holes. The front side plate 7 is shaped like a "7" and has topology optimization holes. The bottom edge of the side plate 8 is connected to or integrally formed with the base plate 8, and the base plate 8 has connection holes. The front plate 8 is shaped like a "7" and has topology optimization holes.

[0014] Further optimization involves an "I"-shaped outer frame for the flat panel, with an "I"-shaped optimization hole in the center.

[0015] To further optimize, topology optimization holes are provided on platform support one and platform support two.

[0016] Further optimization involves the platform adopting a double-long-slot structure design.

[0017] Further optimization involves the mounting plate adapter platform adopting a double-protrusion structure design, and the bolt holes on both sides inside the mounting plate adapter platform adopting a countersunk hole structure design, with the countersunk bolt holes on both sides evenly distributed.

[0018] Further optimization involves designing two rows of waist-shaped holes at the bottom of the mounting plate, with their positions corresponding to the waist-shaped holes on both sides of the mounting plate adapter platform, facilitating connection with the mounting plate adapter platform. The upper part adopts a double-sided L-shaped rib structure design.

[0019] The advantages of this invention are as follows: when the test position of the liquid rocket engine needs to be moved, the fastening bolts on the connecting mounting plate and the platform can be loosened, and the mounting plate and the platform can be moved on the platform. The liquid rocket engine can follow the movement. When the liquid rocket engine moves to the test position, the bolts on the connecting mounting plate and the platform are tightened to lock the mounting plate and the platform. The liquid rocket engine can be hot-fired at different positions on the platform. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a lock-up liquid rocket engine test bench structure based on lightweight design according to the present invention;

[0021] Figure 2 Here are schematic diagrams of the structures of bracket one and bracket two;

[0022] Figure 3 Schematic diagrams of brackets three and four;

[0023] Figure 4 Schematic diagrams of brackets five and six;

[0024] Figure 5 Schematic diagrams of stent seven and stent eight;

[0025] Figure 6 This is a schematic diagram of a flat plate structure;

[0026] Figure 7 This is a structural diagram of Platform Support 1 and Platform Support 2;

[0027] Figure 8 This is a schematic diagram of the platform structure;

[0028] Figure 9 This is a schematic diagram of the mounting plate adapter platform;

[0029] Figure 10 This is a schematic diagram of the mounting plate structure.

[0030] The markings in the diagram are: 15-Liquid rocket engine; 16-Support 1; 17-Support 2; 18-Support 3; 19-Support 4; 20-Support 5; 21-Support 6; 22-Support 7; 23-Support 8; 24-Plate; 25-Platform support 1; 26-Platform support 2; 27-Platform; 28-Mounting plate to platform; 29-Mounting plate. Detailed Implementation

[0031] The following description, in conjunction with the accompanying drawings, further illustrates a lock-up liquid rocket engine test bench based on a lightweight design.

[0032] like Figure 1-10 As shown, this lightweight, locked liquid rocket engine test rig includes eight platform supports (support 16, support 27, support 318, support 419, support 520, support 621, support 72 and support 823), one platform (platform 27), two plate supports (platform support 125 and platform support 226), one plate (plate 24), one mounting plate adapter platform 28, one mounting plate 29 and liquid rocket engine 15.

[0033] Assemble the components of the lock-up liquid rocket engine test rig after it has been designed to be lightweight.

[0034] The flat plate supports one through eight adopt a double L-shaped structure and are welded to the bottom of platform 27 in a U-shape design to increase the stability of the test bench.

[0035] The bottom of the flat plate brackets one through eight is designed with a waist-shaped hole structure for connecting the ground to the anchor bolts of the flat plate brackets.

[0036] Limiting bosses are designed on both sides of the bottom of the mounting plate adapter platform 28, located on both sides of the platform 27, serving as limiting devices during installation and testing. Eight oblong holes (four on each side, totaling eight) are designed on the outer side of the limiting bosses for bolt connection with the mounting plate. Two rows of countersunk holes (eight holes per row, totaling sixteen) are designed inside the mounting plate adapter platform 27, aligned with the long grooves on both sides of the platform. Screws are inserted into the countersunk holes, and washers and nuts are installed at the bottom of the platform 27 to connect the mounting plate adapter platform 28 to the platform 27, achieving locking between them. Two rows of oblong holes (four in each row, totaling eight) are designed on the bottom of the mounting plate 29, corresponding to the oblong holes on both sides of the mounting plate adapter platform 28, for connection with the mounting plate adapter platform 28.

[0037] The upper part of the mounting plate 29 adopts an L-shaped rib structure design to support the thrust generated by the liquid rocket engine 15 during the test and to strengthen the strength to counteract the thrust generated by the liquid rocket engine 15 during the test.

[0038] The mounting plate has four bolt holes in its L-shaped head for positioning and mounting the liquid rocket engine.

[0039] Installation Process: Bracket 1 (16) is welded and assembled 100mm from the front and 80mm from the left of plate 24. Bracket 2 (17) is welded and assembled 100mm from the front and 80mm from the right of plate 24. Brackets 1 (16) and 2 (17) should be parallel. Bracket 3 (18) is welded and assembled 500mm from the front and 80mm from the left of plate 24. Bracket 4 (19) is welded and assembled 500mm from the front and 80mm from the right of plate 24. Brackets 3 (18) and 4 (19) should be parallel. Bracket 5 (20) is welded and assembled 500mm from the rear and 80mm from the left of plate 24. Bracket 6 (21) is welded and assembled 500mm from the rear and 80mm from the right of plate 24. Brackets 5 (20) and 6 (21) should be parallel. Bracket 7 (22) is welded and assembled 100mm from the rear and 80mm from the left of plate 24. Bracket 8 (23) is welded and assembled 100mm from the rear and 80mm from the right of plate 24. Brackets 7 (22) and 8 (23) should be parallel. Platform support 1 25 is welded and assembled 50mm to the right of platform 24; platform support 26 is welded and assembled 50mm to the left of platform 24, with platform support 1 25 and platform support 26 kept parallel.

[0040] After platform support 1 25 is welded to platform 24, it is then welded and assembled 300mm from the left side of plate 27; after platform support 22 26 is welded to platform 24, it is then welded and assembled 300mm from the right side of plate 27. After welding and assembly, the interval between platform support 1 25 and platform support 22 26 is 120mm.

[0041] After the test bench components are welded and assembled, the surface of the test bench is intact and does not affect the installation of the mounting plate transfer platform 28.

[0042] Mounting plate adapter platform 28 is connected to platform 24 by bolts. Mounting plate adapter platform 28 is connected to mounting plate 29 by bolts. Mounting plate 29 is connected to liquid rocket engine 15 by bolts.

[0043] After the test bench is assembled, a 2600mm × 1600mm pre-embedded pit with a depth of 740mm is dug in the horizontal ground. The pit is backfilled with 240mm of concrete, leaving eight 80mm × 80mm square holes with a depth of 240mm. The ground is a flat concrete floor that does not affect the installation of the test bench. The plate supports 1-8 are aligned with the eight square holes in the pit.

[0044] After placing the anchor bolts in the square holes, pass them through the waist-shaped holes at the bottom of the flat plate brackets 1-8 to connect the ground to the flat plate brackets 1-8. After tightening the anchor bolts, backfill the 8 square holes in the pit with concrete until it is flush with the ground of the pre-buried pit.

[0045] After the lightweight test bench was placed on the backfilled ground, the pre-embedded ground was backfilled until it was flush with the horizontal plane.

[0046] Loosen the fixing bolts of the mounting plate adapter platform 28 and platform 24.

[0047] After the fixing bolts of the mounting plate 29 and the mounting plate adapter platform 28 are loosened, the mounting plate adapter platform 28 moves on the platform 24, and the liquid rocket engine 15 moves along with the mounting plate on the mounting plate adapter platform 28.

[0048] Once the liquid rocket engine is moved to the appropriate position, tighten the fixing bolts of the mounting plate adapter platform 28 and platform 24 to lock the mounting plate adapter platform 28 and platform 24.

[0049] After the mounting plate adapter platform 28 and platform 24 are locked together, the liquid rocket engine 15 undergoes a hot test.

[0050] The foregoing has shown and described the basic principles, main structure, and advantages of the present invention. Those skilled in the art should understand that variations and modifications in size and orientation, etc., can be made without departing from the spirit and scope of the invention, and all such variations and modifications fall within the scope of the claims.

Claims

1. A lightweight, closed-type liquid rocket engine test rig, the rig being fixedly installed on the ground or in a pit, characterized in that: Support bracket 1, support bracket 2, support bracket 3, support bracket 4, support bracket 5, support bracket 6, support bracket 7 and support bracket 8 are installed below the flat plate. Platform support 1 and platform support 2 are installed above the flat plate. The platform is installed above platform support 1 and platform support 2. The mounting plate for connecting the liquid rocket engine is transferred to the platform and installed above the platform. Both bracket 1 and bracket 2 are L-shaped. The bottom edge of the front plate 1 of bracket 1 is connected to or integrally formed with the base plate 1, and the side edge of the front plate 1 is connected to or integrally formed with the side plate 1. The bottom edge of the front plate 2 of bracket 2 is connected to or integrally formed with the base plate 2, and the side edge of the front plate 2 is connected to or integrally formed with the side plate 2. The base plate 1 and base plate 2 are provided with connection holes for fixed connection with the ground or pit. The front plate 1 and side plate 1 are provided with topology optimization holes. The edge of the side plate 1 is flush with the edge of the topology optimization hole of the front plate 1. The front plate 2 and side plate 2 are provided with topology optimization holes. The edge of the side plate 2 is flush with the edge of the topology optimization hole of the front plate 2. The bottom edge of the front plate of bracket 3 is connected to or integrally formed with the base plate 3, and the side edge of the front plate of bracket 3 is connected to or integrally formed with the side plate of bracket 3. The side plate of bracket 3 is Y-shaped. The bottom edge of the front plate of bracket 4 is connected to or integrally formed with the base plate of bracket 4, and the side edge of the front plate of bracket 4 is connected to or integrally formed with the side plate of bracket 4. The side plate of bracket 4 is Y-shaped. Topology optimization holes are provided on the front plate of bracket 3 and the front plate of bracket 4. The bottom edge of the front plate of bracket 5 is connected to or integrally formed with the base plate 5, and the side edge of the front plate of bracket 5 is connected to or integrally formed with the side plate of bracket 5. The bottom edge of the front plate of bracket 6 is connected to or integrally formed with the base plate of bracket 6, and the side edge of the front plate of bracket 6 is connected to or integrally formed with the side plate of bracket 6. The base plate 5 and the base plate 6 are provided with connection holes for fixed connection with the ground or pit. The front plate 5 and the side plate 5 are provided with topology optimization holes. The connection or transition between the side plate 5 and the front plate 5 is provided with equal stress weight reduction windows. The front plate 6 and the side plate 6 are provided with topology optimization holes. The connection or transition between the side plate 6 and the front plate 6 is provided with equal stress weight reduction windows. Both bracket 7 and bracket 8 are L-shaped. The bottom edge of the front side plate 7 is connected to or integrally formed with the base plate 7. The base plate 7 is provided with connection holes. The front side plate 7 is "7" shaped and is provided with topology optimization holes. The bottom edge of the side plate 8 is connected to or integrally formed with the base plate 8. The base plate 8 is provided with connection holes. The front plate 8 is "7" shaped and is provided with topology optimization holes. The mounting plate adapter platform adopts a double boss structure design. The bolt holes on both sides inside the mounting plate adapter platform adopt a countersunk hole structure design, and the countersunk bolt holes on both sides are evenly distributed. The mounting plate adapter platform adopts a double boss structure design. The bolt holes on both sides inside the mounting plate adapter platform adopt a countersunk hole structure design, and the countersunk bolt holes on both sides are evenly distributed.

2. The lock-type liquid rocket engine test rig based on lightweight design according to claim 1, characterized in that: The outer frame of the flat plate is in the shape of an "I" and has an "I" shaped optimization hole in the center.

3. The lock-up liquid rocket engine test rig based on lightweight design according to claim 1, characterized in that: The platform support one and platform support two are provided with topology optimization holes.

4. The lock-type liquid rocket engine test rig based on lightweight design according to claim 1, characterized in that: The platform adopts a double-long-slot structure design.

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