Rocket engine test bed inclined diversion trench and test bed system

Abstract

The utility model provides a rocket engine test bed inclined type diversion trench and a test bed system, the diversion trench comprises a diversion trench side wall retaining wall, a diversion trench diversion retaining wall and a diversion trench bottom plate, the diversion trench side wall retaining wall and the diversion trench diversion retaining wall are enclosed, and the diversion trench side wall retaining wall and the diversion trench diversion retaining wall are combined with the diversion trench bottom plate to form a reservoir; and the diversion trench diversion retaining wall is obliquely arranged and is connected with a test bed so as to guide gas exhaust of a rocket engine thrust chamber spray pipe on the test bed to water of the reservoir for noise reduction. The diversion trench building is simple in structure, and construction difficulty and workload are reduced.

Description

Technical Field

[0001] The utility model relates to the field of rocket engines, and particularly relates to an inclined flow guiding groove and a test stand system for a rocket engine test stand. Background Art

[0002] At present, most large-tonnage and large-thrust liquid oxygen / methane liquid rocket engine test stands in the aerospace industry install engines in a vertical manner, and the flow guiding groove type is also designed vertically, with a curved bottom surface. This method can quickly direct the gas ejected by the engine thrust chamber during the test away from the test stand, preventing the flame, smoke, and debris from reflecting and impacting the launch pad and damaging the engine and other equipment. According to the construction characteristics of the vertical test stand, the vertical flow guiding groove needs to be deeply dug and constructed below the foundation of the test stand, with a large amount of work, complex construction, and high investment costs.

[0003] To reduce the construction difficulty and workload of the flow guiding groove, it is particularly important to design an inclined flow guiding groove and a test stand system for a rocket engine test stand. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an inclined flow guiding groove and a test stand system for a rocket engine test stand.

[0005] The utility model provides an inclined flow guiding groove and a test stand system for a rocket engine test stand, including: a side wall retaining wall of the flow guiding groove, a flow guiding retaining wall of the flow guiding groove, and a bottom plate of the flow guiding groove. The side wall retaining wall of the flow guiding groove and the flow guiding retaining wall of the flow guiding groove enclose and are combined with the bottom plate of the flow guiding groove to form a reservoir. The flow guiding retaining wall of the flow guiding groove is inclined and connected to the test stand to guide the gas exhaust from the nozzle of the rocket engine thrust chamber on the test stand into the water in the reservoir for noise reduction.

[0006] According to an embodiment of the utility model, the bottom layer of the bottom plate of the flow guiding groove is a concrete cushion layer, and the concrete cushion layer is used for leveling.

[0007] According to an embodiment of the utility model, the top layer of the bottom plate of the flow guiding groove is made of reinforced concrete.

[0008] According to an embodiment of the utility model, the bottom plate of the flow guiding groove is provided with flame impact point embedded parts, and the flame impact point embedded parts are used to prevent the gas flame from impacting the bottom plate of the flow guiding groove.

[0009] According to an embodiment of the utility model, the bottom plate of the flow guiding groove is provided with drain holes.

[0010] According to an embodiment of the present utility model, a water recovery pool outside the retaining wall is arranged on the outer side of the side wall of the diversion trough, and the water recovery pool outside the retaining wall surrounds at least a part of the side wall retaining wall of the diversion trough to collect the water splashed out from the water storage pool.

[0011] According to an embodiment of the present utility model, it further includes a low-point water inlet for connecting the water recovery pool outside the retaining wall and the water storage pool to divert the water in the water recovery pool outside the retaining wall into the water storage pool.

[0012] According to an embodiment of the present utility model, at least one of the diversion retaining wall of the diversion trough and the bottom plate of the diversion trough is provided with a plurality of deformation joints at intervals to prevent it from cracking.

[0013] On the other hand, the present utility model provides a rocket engine test stand system, including a test stand and the inclined diversion trough as described above; the end face of the test stand for placing the rocket engine is inclined so that the tail of the nozzle of the thrust chamber of the rocket engine faces the bottom plate of the diversion trough obliquely.

[0014] According to an embodiment of the present utility model, a test lift platform is arranged near the diversion retaining wall of the diversion trough, and the test lift platform is liftable relative to the test stand, and the test lift platform is used for staff to enter the test stand for test operation.

[0015] According to the inclined diversion trough of the rocket engine test stand of the present utility model, through the inclined diversion retaining wall of the diversion trough, the gas exhaust of the nozzle of the thrust chamber is diverted into the water in the water storage pool, realizing noise reduction, and the building structure is simple, reducing the construction difficulty and workload.

[0016] It should be understood that the above general description and the following specific embodiments are only exemplary and explanatory, and cannot limit the scope claimed by the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings are part of the specification of the present utility model, which illustrate the exemplary embodiments of the present utility model, and the attached drawings are used together with the description of the specification to explain the principle of the utility model.

[0018] Figure 1 It is a top view of the inclined diversion trough of the rocket engine test stand according to an embodiment of the present utility model;

[0019] Figure 2 It is a side view of the inclined diversion trough of the rocket engine test stand according to another embodiment of the present utility model.

[0020] Description of the reference numerals:

[0021] A-engine test bench; A1-engine thrust chamber nozzle; A2-test lift platform; B-inclined guide trough; B1-guide trough left wall retaining wall; B2-guide trough right wall retaining wall; B3-guide trough tail retaining wall; B4-guide trough bottom plate; B5-flame impact point embedded parts; B6-guide trough straight ladder; B7-guide trough ground step; B8-deformation joint; B9-guide trough guide retaining wall; C1-guide trough left wall retaining wall outside water recovery pool; C2-guide trough right wall retaining wall outside water recovery pool; D1-water recovery drainage ditch outside the retaining wall at the end of the diversion trough; D2-water recovery drainage ditch on the left retaining wall; D3-water recovery drainage ditch on the right retaining wall; X-fire water pump room; X1-water delivery pipe on the left side of the diversion trough; X2-water delivery pipe on the right side of the diversion trough; a1-return water inlet on the left retaining wall of the diversion trough; a2-low point water inlet on the left return water pool; b1-return water inlet on the right retaining wall of the diversion trough; b2-low point water inlet on the right return water pool; e1-water delivery valve on the left side of the diversion trough; e2-water delivery valve on the right side of the diversion trough. DETAILED DESCRIPTION

[0022] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are used to illustrate the principles of the present invention, and are not configured to limit the present invention. In addition, the structural components in the drawings are not necessarily drawn to scale. For example, the sizes of some structural components or areas in the drawings may be enlarged for other structural components or areas to help understand the embodiments of the present invention.

[0023] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of the utility model. In the description of the utility model, it should be noted that, unless otherwise specified, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0024] In addition, the terms "include", "comprise", "have" or any other variations thereof are intended to cover non-exclusive inclusion, so that a structure or component including a series of elements includes not only those elements, but also other mechanical elements that are not explicitly listed or inherent in the structure or component. In the absence of more restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the article or device including the elements.

[0025] Spatial relationship terms such as "below", "beneath", "under", "lower", "above", "on", "higher", etc. are used for convenience of description to explain the positioning of one component relative to a second component, and these terms are intended to cover different orientations of the device in addition to orientations different from those shown in the figures. Additionally, for example, "one component is on / under another component" may mean that the two components are in direct contact, or it may mean that there are other components between the two components. Furthermore, terms such as "first", "second", etc. are also used to describe various components, regions, parts, etc., and do not particularly refer to an order or sequence, and should not be construed as a limitation. Similar terms represent similar components throughout the description.

[0026] In the process of describing the present utility model below, in certain scenario descriptions, only "rocket", "launch vehicle", "spacecraft", "space launch vehicle", or "missile" may be used. This is merely for convenience of description, and its connotation is not limited to the specific words used. Generally, the rockets of the present utility model include launch vehicles, space launch vehicles for carrying satellites, spacecraft, or other detectors, as well as various missiles, rockets, and other weapons for carrying military payloads, and similar products capable of sending payloads into the air. Those skilled in the art should not limit the rocket to only one of the launch vehicle or missile based on the specific words used in the description scenario, thereby narrowing the protection scope of the present utility model.

[0027] For those skilled in the art, the present utility model can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present utility model by showing examples of the present utility model.

[0028] Figure 1 is a top view of the inclined flow guide trough of the rocket engine test stand according to an embodiment of the present utility model; Figure 2 is a side view of the inclined flow guide trough of the rocket engine test stand according to another embodiment of the present utility model.

[0029] As Figure 1 and 2 shown, the present utility model provides an inclined flow guide trough for a rocket engine test stand, including: a flow guide trough side wall retaining wall, a flow guide trough flow guide retaining wall B9, and a flow guide trough bottom plate B4. The flow guide trough side wall retaining wall surrounds the flow guide trough flow guide retaining wall B9 and combines with the flow guide trough bottom plate B4 to form a reservoir. The flow guide trough flow guide retaining wall B9 is inclined and connected to the test stand A to divert the gas exhaust from the nozzle A1 of the rocket engine thrust chamber on the test stand A into the water in the reservoir for noise reduction.

[0030] Specifically, the depth of the vertical diversion channel is about 20 meters to 30 meters, and the length of the horizontal section of the bottom surface curved diversion is about 50 meters to 70 meters. A heat-resistant concrete layer about half a meter thick and a steel trough plate for water spraying and noise reduction need to be set on the surface of the diversion channel to provide thermal protection for the diversion channel. For example, tens of thousands of small pores also need to be opened on the steel trough plate. By spraying water through the pores, a protective water film is formed on the surface of the steel trough plate to reduce the temperature of the engine gas flame. Therefore, a large amount of water usually needs to be stored on the steel trough plate, and by spraying water on the high-temperature gas, the gas injection speed and temperature are reduced to achieve noise reduction and reduce the impact on the surroundings. Usually, a fire pool and high-power water pumps need to be set up, or a high-level water pool is set up to provide water for noise reduction. In addition, the setting of the steel trough plate and the processing technology of the openings on the steel trough plate are complex, and the water consumption for spraying is large. The high-level water pool generally needs to be built 60 meters to 120 meters high, with great construction difficulty. The investment cost of the fire pool and high-power water supply pumps is high. Therefore, the total investment cost of the vertical diversion channel is relatively high.

[0031] For the diversion channel of this embodiment, by setting an inclined diversion channel diversion wall, the gas exhaust ejected from the thrust chamber nozzle can be diverted into the water in the reservoir. By reducing the gas jet speed and temperature, noise reduction is achieved. Through experimental verification, by using the inclined diversion channel of the present utility model and filling water in the reservoir for protection, the noise can be reduced by 10 dB to 15 dB, effectively avoiding the impact of noise on the surrounding area. For example, the side wall diversion wall of the diversion channel can be made of reinforced concrete. In addition, for the rocket engine test run with the same parameters, the length of the diversion channel of this embodiment is about 50 meters to 60 meters, and the depth is about 15 meters to 20 meters, which is significantly reduced compared with the vertical diversion channel. Moreover, the building structure is simple, the overall construction difficulty is low, the feasibility is good, the investment cost is reduced, the construction period is shortened, and it has a high cost performance.

[0032] The inclined diversion channel of this embodiment can be applied to the test runs of engines using various fuels such as liquid oxygen / methane, liquid oxygen / kerosene, and liquid oxygen / liquid hydrogen, and can meet the noise reduction requirements for the test runs of engines with various thrusts such as medium thrust or large thrust.

[0033] According to an embodiment of the present utility model, the side wall diversion wall of the diversion channel includes a left side wall diversion wall B1 of the diversion channel, a right side wall diversion wall B2 of the diversion channel, and a tail wall diversion wall B3 of the diversion channel. The left side wall diversion wall B1 of the diversion channel, the tail wall diversion wall B3 of the diversion channel, the right side wall diversion wall B2 of the diversion channel, and the diversion wall B9 of the diversion channel are connected in sequence to enclose a reservoir with a trough-shaped protection structure to meet the water storage requirements of the reservoir and prevent a large amount of water in the reservoir from splashing out of the reservoir during the test run due to impact.

[0034] In this embodiment, since the tail of the diversion channel is subjected to a relatively large impact of the gas, the building height of the retaining wall B3 at the tail of the diversion channel can be higher than that of the retaining wall B1 on the left side wall of the diversion channel and the retaining wall B2 on the right side wall of the diversion channel, so as to better prevent the splashing of water.

[0035] According to an embodiment of the present invention, the bottom layer of the diversion channel bottom plate B4 is a concrete cushion layer, and the concrete cushion layer is used for leveling.

[0036] In this embodiment, the bottom layer of the diversion channel bottom plate can adopt a 100mm thick C15 plain concrete cushion layer.

[0037] According to an embodiment of the present invention, the top layer of the diversion channel bottom plate B4 is made of reinforced concrete material.

[0038] In this embodiment, the top layer of the diversion channel bottom plate can adopt a C35 reinforced concrete U-shaped groove main structure, with a concrete strength grade of C35 and an impermeability grade of P8.

[0039] According to an embodiment of the present invention, the diversion channel bottom plate B4 is provided with a flame impact point embedment B5, and the flame impact point embedment B5 is used to prevent the gas flame from impacting the diversion channel bottom plate B4.

[0040] Using the diversion channel of this embodiment, during the rocket engine test run, when the water storage tank is empty, or when the water level in the water storage tank splashes due to the impact of the gas, resulting in the water level being lower than the gas flame impact point, the flame impact point embedment B5 can effectively protect the diversion channel bottom plate B4 from impact, preventing the gas flame from damaging the diversion channel bottom plate. The flame impact point embedment can be a steel plate. The flame impact point embedment (such as a steel plate) can be set only in the area of the diversion channel that can be impacted by the gas flame ejected from the nozzle of the engine thrust chamber. For example, the steel plate can be about 16mm - 20mm thick.

[0041] The present invention does not specifically limit the material, style, specifications, etc. of the flame impact point embedment.

[0042] According to an embodiment of the present invention, the diversion channel bottom plate B4 is provided with drainage holes.

[0043] Because the groundwater level at the diversion channel site is relatively high, and the groundwater level is close to the surface water level at this place. In this embodiment, setting drainage holes in the diversion channel bottom plate can reduce the effective water level and prevent the diversion channel bottom plate from floating when there is a pressure difference between the surface water and groundwater in the diversion channel. For example, the diversion channel bottom plate can be provided with 150mm - 200mm drainage holes at intervals of 2m - 3m along its transverse and longitudinal directions.

[0044] According to an embodiment of the present invention, an external water recovery pool for the retaining wall is arranged on the outer side surface of the diversion channel side wall retaining wall, and the external water recovery pool surrounds at least part of the diversion channel side wall retaining wall to collect the water splashed out from the water storage tank.

[0045] In this embodiment, the water recovery pool outside the retaining wall can be used as an auxiliary facility for the diversion channel. When the water level in the water storage tank is too high, during the commissioning process, the water in the water storage tank is impacted by the gas, and the water will splash out from the retaining wall of the diversion channel. In the inclined diversion channel of this embodiment, the water recovery pool outside the retaining wall can collect the splashed water and can also return the water back to the water storage tank, enabling the reuse of water resources, avoiding the waste of water resources, and saving the test cost.

[0046] According to an embodiment of the present invention, the water recovery pool outside the retaining wall may include a water recovery pool C1 outside the left retaining wall of the diversion channel and a water recovery pool C2 outside the right retaining wall of the diversion channel, respectively surrounding at least a part of the left retaining wall B1 of the diversion channel and the right retaining wall B2 of the diversion channel.

[0047] Furthermore, the water recovery pool outside the retaining wall may also include a water recovery drainage ditch D1 outside the tail retaining wall of the diversion channel. The water recovery drainage ditch D1 outside the tail retaining wall of the diversion channel is arranged around the tail retaining wall of the diversion channel, and its two ends are respectively communicated with the water recovery pool C1 outside the left retaining wall of the diversion channel and the water recovery pool C2 outside the right retaining wall of the diversion channel to collect the water splashed out from the tail retaining wall of the diversion channel and divert the water to the water recovery pool C1 outside the left retaining wall of the diversion channel or the water recovery pool C2 outside the right retaining wall of the diversion channel.

[0048] According to an embodiment of the present invention, in addition to the water recovery pool C1 outside the left retaining wall of the diversion channel and the water recovery pool C2 outside the right retaining wall of the diversion channel, the water recovery pool outside the retaining wall may also include a water recovery drainage ditch D2 for the left retaining wall and a water recovery drainage ditch D3 for the right retaining wall. The water recovery drainage ditch D2 for the left retaining wall and the water recovery drainage ditch D3 for the right retaining wall respectively surround at least a part of the left retaining wall B1 of the diversion channel and the right retaining wall B2 of the diversion channel, and are respectively communicated with the water recovery pool C1 outside the left retaining wall of the diversion channel and the water recovery pool C2 outside the right retaining wall of the diversion channel to respectively collect the water splashed out from the left retaining wall B1 of the flow channel and the right retaining wall B2 of the diversion channel and divert the water to the water recovery pool C1 outside the left retaining wall of the diversion channel or the water recovery pool C2 outside the right retaining wall of the diversion channel.

[0049] Furthermore, a water recovery pool C1 outside the retaining wall on the left side of the diversion channel is provided with a water return port a1 in the retaining wall on the left side of the diversion channel. The water return port a1 in the retaining wall on the left side of the diversion channel is used to connect the water recovery pool C1 outside the retaining wall on the left side of the diversion channel and the water recovery drainage ditch D2 of the retaining wall on the left side, so as to recover the water in the water recovery drainage ditch D2 of the retaining wall on the left side into the water recovery pool C1 outside the retaining wall on the left side of the diversion channel. The water recovery pool C2 outside the retaining wall on the right side of the diversion channel is provided with a water return port b1 in the retaining wall on the right side of the diversion channel. The water return port b1 in the retaining wall on the right side of the diversion channel is used to connect the water recovery pool C2 outside the retaining wall on the right side of the diversion channel and the water recovery drainage ditch D3 of the retaining wall on the right side, so as to recover the water in the water recovery drainage ditch D3 of the retaining wall on the right side into the water recovery pool C2 outside the retaining wall on the right side of the diversion channel.

[0050] According to an embodiment of the present invention, in addition to the water recovery pool outside the retaining wall, the diversion channel further includes a low-point water inlet for connecting the water recovery pool outside the retaining wall and the water storage pool, so as to divert the water in the water recovery pool outside the retaining wall into the water storage pool.

[0051] According to an embodiment of the present invention, the low-point water inlet includes a left water return pool low-point water inlet a2 for connecting the water recovery pool C1 outside the retaining wall on the left side of the diversion channel and the water storage pool, so as to divert the water in the water recovery pool C1 outside the retaining wall on the left side of the diversion channel into the water storage pool. The low-point water inlet further includes a right water return pool low-point water inlet b2 for connecting the water recovery pool C2 outside the retaining wall on the right side of the diversion channel and the water storage pool, so as to divert the water in the water recovery pool C2 outside the retaining wall on the right side of the diversion channel into the water storage pool.

[0052] In the diversion channel of this embodiment, the water in the water recovery pool outside the retaining wall is diverted into the water storage pool through the left water return pool low-point water inlet a2 and the right water return pool low-point water inlet b2, realizing the recycling of water and avoiding the waste of water resources.

[0053] During the commissioning process, due to the impact of gas on the water in the water storage pool, the water in the water storage pool will splash out from the retaining wall on the side wall of the diversion channel. Through the diversion channel of this embodiment, the splashed water can be collected into the water recovery drainage ditch D1 outside the retaining wall at the tail of the diversion channel, the water recovery drainage ditch D2 of the retaining wall on the left side, and the water recovery drainage ditch D3 of the retaining wall on the right side, and recovered into the water recovery pool outside the retaining wall through the water return port a1 in the retaining wall on the left side of the diversion channel or the water return port b1 in the retaining wall on the right side of the diversion channel. The water in the water recovery pool outside the retaining wall can flow back into the water storage pool through the left water return pool low-point water inlet a2 and the right water return pool low-point water inlet b2, realizing the recycling of water resources and avoiding the waste of water resources.

[0054] According to an embodiment of the present invention, in addition to the water recovery pool outside the retaining wall, the diversion channel further includes a fire pump house X. The fire pump house X is provided with a fire water pool and a delivery water pump. The delivery water pump is used to transport the water in the fire water pool to the water storage pool through a water delivery pipeline.

[0055] The present utility model does not specifically limit the material and quantity of the water conveyance pipelines, the form of the water conveyance pumps, etc.

[0056] According to an embodiment of the present utility model, the water conveyance pipelines include a left-side water conveyance pipeline X1 of the diversion trough and a right-side water conveyance pipeline X2 of the diversion trough. The left-side water conveyance pipeline X1 of the diversion trough and the right-side water conveyance pipeline X2 of the diversion trough are respectively arranged on the inner side walls of the retaining walls B1 on the left side wall of the diversion trough and the retaining walls B2 on the right side wall of the diversion trough, and are communicated with the fire water pump house X to convey the water in the fire water pump house to the water storage tank.

[0057] Furthermore, a left-side water conveyance valve e1 of the diversion trough and a right-side water conveyance valve e2 of the diversion trough are respectively arranged on the left-side water conveyance pipeline X1 of the diversion trough and the right-side water conveyance pipeline X2 of the diversion trough. The left-side water conveyance valve e1 of the diversion trough and the right-side water conveyance valve e2 of the diversion trough are used to respectively control the on-off of the left-side water conveyance pipeline X1 of the diversion trough and the right-side water conveyance pipeline X2 of the diversion trough.

[0058] In this embodiment, the left-side water conveyance valve e1 of the diversion trough and the right-side water conveyance valve e2 of the diversion trough can be pneumatic globe valves. The present utility model does not specifically limit the types of the left-side water conveyance valve e1 of the diversion trough and the right-side water conveyance valve e2 of the diversion trough.

[0059] According to an embodiment of the present utility model, the water storage tank can be replenished with water by using a municipal water supply network or a tank truck, etc.

[0060] According to an embodiment of the present utility model, at least one of the diversion retaining wall B9 of the diversion trough and the bottom plate B4 of the diversion trough is provided with a plurality of deformation joints B8 at intervals to prevent cracking.

[0061] For the diversion trough provided in this embodiment, a deformation joint can be arranged every 10 - 15 mm in the direction towards the tail retaining wall of the diversion trough, which can reduce the stress of the diversion retaining wall B9 of the diversion trough and the bottom plate B4 of the diversion trough, thereby avoiding cracking or settlement. The deformation joint can be a expansion joint, a construction joint, a settlement joint, or a combination thereof.

[0062] According to an embodiment of the present utility model, a vertical straight ladder B6 of the diversion trough is arranged on the inner side surface of the side wall retaining wall of the diversion trough, and the straight ladder B6 of the diversion trough is used for personnel to enter the water storage tank from outside the side wall retaining wall of the diversion trough.

[0063] According to an embodiment of the present utility model, near the side wall retaining wall of the diversion trough, the diversion retaining wall of the diversion trough is provided with a ground step B7 of the diversion trough leading directly to the bottom of the water storage tank. The ground step B7 of the diversion trough is an artificial passage for personnel to access the bottom of the water storage tank for maintenance. Corner steel bars can be arranged at the edge of each step of the ground step B7 of the diversion trough.

[0064] On the other hand, the present utility model provides a rocket engine test stand system, including test stand A and the above-mentioned inclined flow guide groove B. The end face of the test stand A for placing the rocket engine is inclined, so that the tail of the nozzle A1 of the rocket engine thrust chamber is inclined towards the bottom plate B4 of the flow guide groove.

[0065] The test stand of the test stand system in this embodiment adopts an inclined design, which can make the axial center line of the engine present an angle with the horizontal plane, and through the inclined flow guide groove, the gas exhaust ejected from the engine thrust chamber is drained into the reservoir, so as to reduce the noise by reducing the gas jet speed and temperature. For example, the inclination angle of the flow guide wall of the flow guide groove can be the same as the inclination angle of the test stand to further reduce the impact damage to the side wall of the flow guide groove.

[0066] In this embodiment, the appropriate inclination angle can be calculated through simulations such as pre-cooling of the engine pipeline, thrust measurement, and thrust conversion. For example, the inclination angle of the test stand can be selected to be 20° inclined downward from the plane. Through simulation calculation, the test stand system of the present utility model can effectively avoid the phenomenon of ignition delay when the engine starts, and there is no need to adopt the intermediate storage tank required for the start of the engine in the vertical test stand.

[0067] In this embodiment, inclined flow guide grooves of different specifications can be designed according to the inclination angle of the test stand A.

[0068] According to an embodiment of the present utility model, a test stand lifting platform A2 is arranged near the flow guide wall B9 of the flow guide groove on the test stand A. The test stand lifting platform A2 can be lifted and lowered relative to the test stand A, and the test stand lifting platform A2 is used for staff to enter the test stand A for test operation.

[0069] In this embodiment, the test stand lifting platform A2 can be used for the loading and unloading of the nozzle plug of the engine thrust chamber, the installation and inspection of the engine, etc. When the engine needs to be installed, the test stand lifting platform is raised; when the engine is ignited for testing, the test stand lifting platform is lowered to avoid being burned by the flame when the engine swings during testing.

[0070] When conducting a rocket engine test run using the test stand system of an embodiment of the present utility model, the process of replenishing and storing water in the reservoir before the rocket engine test run is as follows: First, calculate the approximate amount of water to be replenished and stored in the diversion channel reservoir based on the gas flow rate value, test run duration, and reservoir volume during the test injection of the gas through the nozzle of the engine thrust chamber. Then, open the left water supply valve e1 and the right water supply valve e2 of the diversion channel, and the water supply pump in the pneumatic fire pump house. Pump the water from the fire pool into the reservoir through the left water supply pipeline X1 and the right water supply pipeline X2 of the diversion channel for water replenishment and storage. When the water storage level in the reservoir reaches a certain height and the water level covers the gas rocket impact point area, turn off the water supply pump, the left water supply valve e1, and the right water supply valve e2 of the diversion channel.

[0071] Before conducting a rocket engine test run using the test stand system of the present utility model, it is necessary to first lower the test run lifting platform A2 to the lowest point to prevent the test run lifting platform A2 from being burned by the flame during the engine sway test run.

[0072] During the ignition test run of the engine, the gas jet ejected from the nozzle of the engine thrust chamber strongly mixes with the surrounding air, generating a powerful aerodynamic noise. Using the test stand system of the present utility model, the gas ejected from the nozzle of the engine thrust chamber is sprayed into the water in the water storage tank along the inclined diversion channel retaining wall, thereby reducing the gas jet velocity and temperature, and reducing the gas flow noise conversion efficiency and sound energy to achieve noise reduction.

[0073] The present utility model does not specifically limit the building specifications (such as thickness), shapes, structures, types, etc. of the diversion channel, the external water recovery pool outside the retaining wall, the external water recovery drainage ditch outside the tail retaining wall of the diversion channel, the left side wall retaining wall water recovery drainage ditch, the right side wall retaining wall water recovery drainage ditch, the straight ladder of the diversion channel, the ground step of the diversion channel, etc. For example, various components of the diversion channel can be made of materials such as concrete and steel plates.

[0074] The above embodiments of the present utility model can be combined with each other and have corresponding technical effects.

[0075] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An inclined guide trough of a rocket engine test bench, characterized in that: include: The guide trough side wall retaining wall, the guide trough guide retaining wall and the guide trough bottom plate, the guide trough side wall retaining wall and the guide trough guide retaining wall are enclosed and combined with the guide trough bottom plate to form a water reservoir; the guide trough guide retaining wall is inclined and connected to the test bench to guide the gas exhaust of the rocket engine thrust chamber nozzle on the test bench into the water of the water reservoir for silencing and noise reduction.

2. The guide groove according to claim 1, characterized in that: The bottom layer of the guide trough bottom plate is a concrete cushion layer, and the concrete cushion layer is used for leveling.

3. The guide groove according to claim 1, characterized in that: The top layer of the guide trough bottom plate is made of reinforced concrete material.

4. The guide groove according to claim 1, characterized in that: The guide groove bottom plate is provided with flame impact point embedded parts, and the flame impact point embedded parts are used to prevent the gas flame from impacting the guide groove bottom plate.

5. The guide groove according to claim 1, characterized in that: The guide trough bottom plate is provided with drainage holes.

6. The guide groove according to claim 1, characterized in that: An outer water recovery pool is arranged on the outer side of the retaining wall of the guide trough side wall, and the outer water recovery pool surrounds at least a part of the retaining wall of the guide trough side wall to collect water splashed out from the water reservoir.

7. The guide groove according to claim 6, characterized in that: It also includes a low-point water inlet for connecting the water recovery pool outside the retaining wall and the water storage tank to guide the water in the water recovery pool outside the retaining wall to the water storage tank.

8. The guide channel according to claim 1, characterized in that: At least one of the guide trough guide retaining wall and the guide trough bottom plate is provided with a plurality of deformation joints to prevent cracking.

9. A rocket engine test bench system, characterized in that: It comprises a test bench and an inclined guide trough as described in any one of claims 1 to 8; the test bench is used to place a rocket engine with its end face inclined so that the tail of the rocket engine thrust chamber nozzle is inclined toward the bottom plate of the guide trough.

10. The test bench system according to claim 9, characterized in that: The test bench is provided with a test lift platform near the guide groove guide retaining wall. The test lift platform can be raised and lowered relative to the test bench. The test lift platform is used for staff to enter the test bench to perform test operations.

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