A method for low-thrust, high-flow-rate steam delivery for vertical high-altitude simulation test benches
By setting up a combination structure of multiple steam generators and branch and main pipelines on a vertical high-altitude simulation test bench, and by using natural compensation parts and supports to reduce the impact of vibration, the vibration and torque problems of the vertical high-altitude simulation test bench during high-flow steam transportation were solved, and a stable supply of high-temperature and high-pressure steam was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-05
- Publication Date
- 2026-04-03
AI Technical Summary
When transporting large volumes of steam, vertical high-altitude simulation test benches are unable to withstand the forces and torques caused by huge vibrations, leading to steam pipe breakage. Furthermore, existing technologies are unable to stably supply large volumes of steam under high temperature and strong vibration environments.
A steam delivery system consisting of multiple steam generators and branch and main pipelines is used to reduce the impact of vibration and thermal displacement on the ejector by setting up structures such as curved natural compensation parts, supports and tie rod corrugated compensators, so as to achieve a stable supply of high temperature and high pressure steam.
Under high temperature and high pressure conditions, a stable supply of large flow of steam was achieved, reducing the impact of vibration and torque on the ejector and ensuring the stable operation of the vertical high-altitude simulation test bench.
Smart Images
Figure CN121048920B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of rocket engine testing technology, specifically to a method for delivering small-thrust, high-flow-rate steam for a vertical high-altitude simulation test rig. Background Technology
[0002] As the thrust of upper-stage liquid rocket engines gradually increases, larger steam ejection systems are needed for high-altitude simulation tests of rocket engines to meet the requirements of these tests. High-altitude simulation tests typically require high-vacuum pumping. Current technology usually utilizes at least three chemical steam generators to transiently produce steam at a flow rate exceeding 200 kg / s to meet the demands of high-vacuum pumping. This method of steam generation can produce hundreds of kilograms of steam within 5 seconds, generating massive vibrations of 2000-3000 Gs in the steam ejection system's pipes, causing significant pipe movement and even potential pipe breakage.
[0003] Meanwhile, to better replicate the rocket engine's operational state in space during ground tests and achieve better consistency between ground and space environments, vertical high-altitude simulation test rigs are generally used instead of horizontal ones. In vertical high-altitude simulation test rigs, the rocket engine, diffuser, and ejector are all installed vertically. The ejector height is generally over 20 meters, making it difficult for the vertical high-altitude simulation test rig to withstand the significant forces and moments generated by the enormous vibrations produced by the steam delivery pipelines when transporting large volumes of steam. Summary of the Invention
[0004] In view of this, the present invention provides a method for low-thrust, high-flow-rate steam transport for a vertical high-altitude simulation test bench, in order to solve the problem that the ejector of the existing vertical high-altitude simulation test bench is very high, which makes it difficult for the vertical high-altitude simulation test bench to withstand the large force and torque caused by the huge vibration generated by the steam transport pipeline when transporting a large flow of steam.
[0005] This invention provides a method for delivering high-flow-rate steam with low thrust for a vertical high-altitude simulation test rig. The method is applied to the vertical high-altitude simulation test rig and supplies steam to a vertical high-altitude ejector via a steam delivery system. The steam delivery system provides a stable supply of high-flow-rate ejector steam under instantaneous start-up and shutdown conditions of less than 5 seconds and a steam flow rate exceeding 200 kg / s. The steam delivery system is suitable for supplying steam to vertical ejectors.
[0006] The steam delivery system includes:
[0007] Multiple steam generators are available for producing steam.
[0008] Multiple branch pipes are installed vertically, and the upper ends of the multiple branch pipes are connected to the output ends of multiple steam generators respectively;
[0009] The main pipeline is horizontally arranged, with the lower ends of multiple branch pipelines connected to the main pipeline. The output end of the main pipeline is connected to the steam inlet of the vertical ejector. Each branch pipeline has a naturally curved compensating section near the main pipeline. Beneficial effects: This application adopts the above technical solution, which, by setting up naturally curved compensating sections, compensates for the thermal displacement of the branch pipelines, reduces the impact of vibration and thermal displacement on the main pipeline, isolates vibration, and has the ability to resist large vibrations and instantaneous steam impacts, minimizing the impact of forces and moments on the vertical ejector. Furthermore, the steam delivery system described in this application has a simple structure and can supply large flow rates of high-temperature and high-pressure steam. It is suitable for supplying ejector steam at different flow rates above 200 kg / s, temperatures above 300°C, and pressures above 1.7 MPa. Simultaneously, the steam delivery system described in this application is used on vertical engine high-altitude simulation test benches with limited space and stringent force requirements. The small-thrust, high-flow-rate steam delivery method for vertical high-altitude simulation test benches described in this application has the advantages of large steam flow rate, resistance to instantaneous impact, and small force and torque on the vertical high-altitude ejector tube. Compared with existing application scenarios in power plants with small flow rate, no instantaneous impact, and large thrust on equipment and civil engineering foundations, it has significant advantages.
[0010] Optionally, the natural compensation section is a π-shaped bend.
[0011] Optionally, a first support is provided on each branch pipe near the steam generator, the first support being adapted to fix the branch pipe; a second support is provided on the main pipe, the second support being adapted to fix the main pipe. Beneficial effects: This application adopts the above technical solution. By setting the first support, the impact of the vibration of the steam generator during operation on the subsequent connected steam pipes is reduced, and the impact of the thermal displacement of the steam pipes on the steam generator is reduced, thus isolating vibration; by setting the second support to isolate vibration, it is ensured that the vibration generated by the steam generator during operation and the airflow impact during start-up and shutdown will not affect the downstream pipes, reducing the impact on the vertical ejector.
[0012] Optionally, the second bracket is located in the middle of the main pipeline.
[0013] Optionally, a tie rod corrugated compensator is provided on the main pipeline near the vertical ejector. Beneficial effect: This application adopts the above technical solution, using a tie rod corrugated compensator to compensate for thermal displacement of the main pipeline within a limited space.
[0014] Optionally, a third support is provided downstream of the tie-rod corrugated compensator on the main pipeline along the steam flow direction. This third support is adapted to fix the main pipeline. Beneficial effect: This application adopts the above technical solution, and by setting a third support, the influence of thermal displacement of the main pipeline on the downstream pipeline is isolated.
[0015] Optionally, the main pipeline is connected to the vertical ejector via at least two even-numbered branch pipelines, with the branch pipelines symmetrically arranged at multiple steam inlets of the vertical ejector. Beneficial effects: By adopting the above technical solution, this application significantly reduces the impact of pipeline vibration on the vertical ejector and reduces the forces and torques acting on the vertical ejector through symmetrical arrangement of branch pipelines before they enter the vertical ejector.
[0016] Optionally, at least one universal hinged compensator is provided on each branch pipe. Beneficial effect: This application adopts the above technical solution, and by setting universal hinged compensators, thermal deformation is compensated, significantly reducing the impact on the vertical ejector.
[0017] Optionally, a valve is provided on each of the branch pipes. Beneficial effect: By adopting the above technical solution, this application allows for high-pressure airtightness testing of the steam generator before rocket engine testing via valves.
[0018] Optionally, the length of each branch pipe shall not be less than 10 meters. Beneficial effects: By adopting the above technical solution, this application ensures that the steam generated by each steam generator is uniformly distributed before mixing, reducing the impact of the first-starting steam generator on the startup of other subsequently starting steam generators when there is a small time difference in startup time during instantaneous startup. Attached Figure Description
[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0020] Figure 1 This is a connection diagram of the steam conveying system provided in an embodiment of the present invention.
[0021] Explanation of reference numerals in the attached figures:
[0022] 1. Steam generator; 2. First support; 3. Valve; 4. Natural compensation unit; 5. Second support; 6. Tie rod corrugated compensator; 7. Third support; 8. Universal hinge compensator; 9. Branch pipeline; 10. Vertical ejector; 11. Main pipeline; 12. Branch pipeline. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0024] In existing technologies, the thermal stress in the steam delivery pipeline connected to the ejector and the large-flow steam impact during start-up and shutdown both generate excessive forces and torques on the ejector, which is highly detrimental to its operation and may even cause damage. Furthermore, due to the compact layout of vertical high-altitude simulation test benches, the space for thermal stress compensation in the steam pipeline is insufficient. Therefore, this application proposes a steam delivery system for delivering large-flow, high-pressure steam to vertical high-altitude simulation test benches in complex environments. This system features strong resistance to large vibrations, high thermal stress compensation capability, and low torque on the ejector, ensuring that the requirements for high-altitude simulation testing of upper-stage large engines are met.
[0025] like Figure 1This application describes a specific embodiment of a steam delivery system in a low-thrust, high-flow-rate steam delivery method for a vertical high-altitude simulation test rig. The method is applied to a vertical high-altitude simulation test rig and supplies steam to the vertical high-engine ejector via the steam delivery system. The system provides a stable supply of high-flow-rate ejector steam with a flow rate exceeding 200 kg / s under instantaneous start-up and shutdown conditions of less than 5 seconds. The system is suitable for supplying steam to the vertical ejector 10. The system includes multiple steam generators 1, multiple branch pipelines 9, and a main pipeline 11. This steam delivery system is used in a vertical high-altitude simulation test rig and is suitable for providing high-pressure, high-flow-rate steam to the vertical ejector 10 under complex high-temperature and strong vibration environments. The system features strong resistance to large vibrations, strong thermal stress compensation capabilities, and low torque on the vertical ejector, making it suitable for high-altitude simulation tests of upper-stage large engines with different thrust levels. The upper stage engine is a liquid rocket engine. The steam delivery system described in this application can be used for a stable supply of ejector steam with a flow rate of over 200 kg / s under instantaneous start-up and shutdown conditions of less than 5 seconds. The vertical ejector 10 described in this application is longer than 20 meters and is highly susceptible to vibration. Multiple steam generators 1 are suitable for generating steam, and the steam generators 1 are at least three chemical steam generators. The multiple steam generators 1 start up and shut down almost simultaneously, with a start-up and shutdown time of less than 5 seconds, enabling rapid steam generation and shutdown. The steam generated by the multiple steam generators 1 has a temperature greater than 300°C and a pressure greater than 1.7 MPa. When the multiple steam generators 1 are started up, the vibration of the steam delivery system pipeline reaches a gravitational acceleration of 2000G to 3000G, and under steady state, the vibration of the steam delivery system pipeline reaches a gravitational acceleration of over 70G.
[0026] The small-thrust, high-flow-rate steam delivery method for vertical high-altitude simulation test benches described in this application has the advantages of large steam flow rate, resistance to instantaneous impact, and small force and torque on the vertical high-altitude ejector tube. Compared with existing application scenarios in power plants with small flow rate, no instantaneous impact, and large thrust on equipment and civil engineering foundations, it has significant advantages.
[0027] Multiple steam generators 1 are connected in parallel to supply a large flow of steam to the vertical ejector 10. The steam generators 1 are fixed vertically to the steel platform, and the steam pipes of the steam generators 1 are led out vertically downwards.
[0028] Multiple branch pipes 9 are arranged vertically, and their upper ends are connected to the output ends of multiple steam generators 1. The main pipeline 11 is arranged horizontally, and the lower ends of the multiple branch pipes 9 are connected to the main pipeline 11. Specifically, the lower ends of the branch pipes 9 and the main pipeline 11 can be connected by 90° elbows. The output end of the main pipeline 11 is connected to the steam inlet of the vertical ejector 10. A natural compensation section 4 is provided on each branch pipe 9 near the main pipeline 11. Specifically, the natural compensation section 4 is a π-shaped bend.
[0029] Furthermore, a first bracket 2 is provided on each branch pipe 9 near the steam generator 1, the first bracket 2 being adapted to fix the branch pipe 9; a second bracket 5 is provided on the main pipe 11, the second bracket being adapted to fix the main pipe 11. Specifically, the second bracket 5 is located at the middle position of the main pipe 11.
[0030] Furthermore, a tie-rod corrugated compensator 6 is provided on the main pipeline 11 near the vertical ejector 10; a third support 7 is provided downstream of the tie-rod corrugated compensator 6 along the steam flow direction on the main pipeline 11, the third support 7 being adapted to fix the main pipeline 11. The main pipeline 11 is connected to the vertical ejector 10 through at least two even-numbered branch pipelines 12, the multiple branch pipelines 12 being symmetrically arranged at multiple steam inlets of the vertical ejector 10, and the multiple branch pipelines 12 having the same dimensions. At least one universal hinge compensator 8 is provided on each branch pipeline 12. Specifically, there are two branch pipelines 12, and universal hinge compensators 8 are installed in pairs at intervals on each branch pipeline 12. Each branch pipeline 12 consists of a horizontal section and a vertical section, the horizontal section being connected to a steam inlet provided on the side wall of the vertical ejector 10, and universal hinge compensators 8 are provided on both the horizontal and vertical sections.
[0031] Furthermore, each of the branch pipes 9 is equipped with a valve 3, specifically a gate valve, which is an electrically operated gate valve. The electrically operated gate valve is used for high-pressure airtightness testing of the steam generator 1 before the rocket engine test. When the steam generator 1 is operating, the electrically operated gate valve is in the open state. The length of each branch pipe 9 is not less than 10 meters.
[0032] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. A method for low-thrust, high-flow-rate steam transport for a vertical high-altitude simulation test bench, characterized in that, The small-thrust, high-flow-rate steam delivery method for a vertical high-altitude simulation test bench is applied to the vertical high-altitude simulation test bench and provides steam supply to the vertical high-altitude ejector tube through a steam delivery system; the steam delivery system provides a stable supply of high-flow-rate ejector steam under instantaneous start-up and shutdown conditions within 5 seconds and a steam flow rate of more than 200 kg / s; the steam delivery system is suitable for supplying steam to the vertical ejector (10); The steam delivery system includes: Multiple steam generators (1) are suitable for generating steam; Multiple branch pipes (9) are set in the vertical direction, and the upper ends of the multiple branch pipes (9) are respectively connected to the output ends of multiple steam generators (1); The main pipeline (11) is arranged horizontally, and the lower ends of multiple branch pipelines (9) are connected to the main pipeline (11), and the output end of the main pipeline (11) is connected to the steam inlet of the vertical ejector (10); a curved natural compensation section (4) is provided on each branch pipeline (9) near the main pipeline (11). The main pipeline (11) is connected to the vertical ejector (10) through at least two even-numbered branch pipelines (12), and the multiple branch pipelines (12) are symmetrically arranged at multiple steam inlets of the vertical ejector (10).
2. The method for low-thrust, high-flow-rate steam transport for a vertical high-altitude simulation test bench according to claim 1, characterized in that, The natural compensation section (4) is a π-shaped bend.
3. The method for low-thrust, high-flow-rate steam transport for a vertical high-altitude simulation test bench according to claim 1 or 2, characterized in that, A first bracket (2) is provided on each of the branch pipes (9) near the steam generator (1), the first bracket (2) being adapted to fix the branch pipe (9); a second bracket (5) is provided on the main pipe (11), the second bracket being adapted to fix the main pipe (11).
4. The method for low-thrust, high-flow-rate steam transport for a vertical high-altitude simulation test bench according to claim 3, characterized in that, The second bracket (5) is located in the middle of the main pipeline (11).
5. The method for low-thrust, high-flow-rate steam transport for a vertical high-altitude simulation test bench according to claim 1 or 2, characterized in that, A tie rod corrugated compensator (6) is provided on the main pipeline (11) near the vertical ejector (10).
6. The method for low-thrust, high-flow-rate steam transport for a vertical high-altitude simulation test bench according to claim 5, characterized in that, A third bracket (7) is provided downstream of the tie rod corrugated compensator (6) along the steam flow direction on the main pipeline (11), and the third bracket (7) is adapted to fix the main pipeline (11).
7. The method for low-thrust, high-flow-rate steam transport for a vertical high-altitude simulation test bench according to claim 1, characterized in that, At least one universal hinged compensator (8) is provided on each branch pipe (12).
8. The method for low-thrust, high-flow-rate steam transport for a vertical high-altitude simulation test bench according to claim 1 or 2, characterized in that, A valve (3) is provided on each of the branch pipes (9).
9. The method for low-thrust, high-flow-rate steam transport for a vertical high-altitude simulation test bench according to claim 1 or 2, characterized in that, The length of each of the aforementioned branch pipes (9) shall not be less than 10 meters.
Citation Information
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