A high-altitude simulation test cabin's cabin-penetrating support structure

Abstract

The application provides a high-altitude simulation test cabin penetrating support structure, which specifically comprises a test cabin body, a cabin support assembly, an engine mounting rack and a rack support assembly. The test cabin body is installed on a factory building foundation through a plurality of cabin support assemblies. A rack concrete foundation is arranged on the factory building foundation below the test cabin body. The engine mounting rack is located in the test cabin body. A gap is maintained between the engine mounting rack and the test cabin body. The engine mounting rack is installed on the rack concrete foundation through a plurality of rack support assemblies penetrating the bottom of the test cabin body. A through hole is arranged in the sidewall of the bottom of the test cabin body for the rack support assembly to penetrate. A gap is arranged between the engine mounting rack and the test cabin body. A gap is arranged between the rack support assembly and the through hole. The edge of the through hole and the rack concrete foundation are sealingly connected through a sealing sleeve assembly. The safe operation of the test equipment is ensured, and the measurement accuracy of the engine performance parameters is ensured.

Description

Technical Field

[0001] This application relates to the field of design of high-altitude simulation test equipment for aero-engines, and in particular to a through-cabin support structure for a high-altitude simulation test chamber. Background Technology

[0002] As one of the important pieces of equipment for conducting high-altitude simulation tests, the test chamber is responsible for installing the engine, air intake pipe and other test devices. The engine is fixed on the moving frame of the test bench inside the test chamber by the mounting bracket. The moving frame and the stationary frame are connected by bolts, and the stationary frame is welded to the test chamber body by the support legs.

[0003] During the test, the compressor, turbine, and other rotating components inside the engine rotate at a high speed of no less than 10,000 r / min, exciting the entire engine to vibrate in a high-frequency, low-amplitude manner. The high-temperature exhaust gas from the engine ejects the ambient gas inside the test chamber through momentum and energy exchange. In order to maintain the test chamber pressure to meet the high-altitude ambient pressure required for the test conditions, two streams are needed to supplement the chamber for ejection cooling and pressure stabilization, either by dry gas supply from the generator set or by atmospheric air intake. The combined operation of the two streams flowing through the chamber and the forecourt and cooler connected to the chamber can induce the test chamber to vibrate in a low-frequency, low-amplitude manner. Therefore, during the test, the chamber vibration is transmitted to the engine through the test bench, and the engine vibration is transmitted to the chamber through the test bench. Thus, the coupling interference caused by the mutual transmission of multi-source vibrations has a significant impact on the safe operation of the test equipment and the accurate measurement of test bench parameters. If the two vibration modes and frequencies are close, resonance may occur, causing irreversible and serious consequences.

[0004] Currently, in order to meet the needs of normal scientific research tasks, filtering is used to process the test bench signals to ensure the accuracy requirements of engine performance parameter measurement. As for the operational safety of the equipment, confirmation and evaluation are carried out before and after the test and during daily inspections, which is not conducive to the health management of the test equipment. Summary of the Invention

[0005] In view of this, this application provides a through-cabin support structure for a high-altitude simulation test chamber, which solves the problem of vibration coupling and mutual interference between the engine and the cabin during high-altitude simulation tests in the prior art, and ensures the safe operation of the test equipment and the normal conduct of the test mission.

[0006] The technical solution for the through-cabin support structure of the high-altitude simulation test chamber provided in this application is as follows:

[0007] A through-cabin support structure for a high-altitude simulation test chamber includes a test chamber body, a body support assembly, an engine mounting platform, and a platform support assembly. The test chamber body is mounted on a factory foundation via multiple body support assemblies. A concrete foundation for the platform is located on the factory foundation below the test chamber body. The engine mounting platform is located inside the test chamber body, and a gap is maintained between the engine mounting platform and the test chamber body. The engine mounting platform is mounted on the platform concrete foundation via multiple platform support assemblies that pass through the bottom of the test chamber body. A through hole is provided on the bottom side wall of the test chamber body for the platform support assemblies to pass through. A gap is provided between the engine mounting platform and the test chamber body, and a gap is provided between the platform support assembly and the through hole. The edge of the through hole and the platform concrete foundation are sealed and connected by a sealing sleeve assembly.

[0008] Optionally, a groove is provided on the foundation of the factory building under the test chamber, and the concrete foundation of the test platform is set in the groove. The concrete foundation of the test platform and the foundation of the factory building are constructed independently.

[0009] Optionally, the test chamber body is provided with chamber support assemblies on both sides opposite to each other on the axis. The test chamber body is provided with chamber support assemblies at the air inlet end, the exhaust end and the axial center. The chamber support assembly includes a concrete support column integrated with the factory foundation and a load-bearing frame fixed to the top of the concrete support column. The top of the load-bearing frame is connected to the test chamber body.

[0010] Optionally, the support frames at the air inlet and exhaust ends of the test chamber are slidably connected to the test chamber body, and the support frame at the axial center of the test chamber body is fixedly connected to the test chamber body. The air inlet and exhaust ends of the test chamber body slide relative to the support frames on a horizontal plane, and the sliding direction includes two vertical directions, one of which is parallel to the axial direction of the test chamber body.

[0011] Optionally, a sliding support structure is installed on the support frame at both the air inlet and exhaust ends of the test chamber. The fixed base of the sliding support structure is installed on the support frame, and the free end of the sliding support structure is fixedly connected to the test chamber. The free end is slidably installed on the base. The sliding direction of the free end includes a first direction and a second direction that are perpendicular to each other. The first direction is parallel to the axis of the test chamber, and the second direction is parallel to the horizontal direction.

[0012] Optionally, the engine mounting platform is provided with platform support assemblies on both sides of the test chamber hull axis. The engine mounting platform is provided with a plurality of platform support assemblies spaced apart. Each platform support assembly includes a leg and a load-bearing support. The bottom end of the load-bearing support is installed on the concrete foundation of the platform, and the top end of the load-bearing support is fixedly connected to the bottom end of the leg. The leg passes through the through hole, and the top end of the leg is fixedly connected to the engine mounting platform.

[0013] Optionally, the concrete foundation of the platform is provided with an embedded beam, which is fixedly connected to the load-bearing support.

[0014] Optionally, embedded beams at the same position along the axial direction of the test chamber are connected to the test bench concrete foundation by embedded steel bars.

[0015] Optionally, the test chamber body is provided with a connecting pipe communicating with the through hole. The connecting pipe extends downward from the test chamber body, and the support leg passes through the connecting pipe. An expansion joint is provided between the bottom end of the connecting pipe and the top end of the load-bearing support, which is sleeved on the outer periphery of the support leg. The top end of the expansion joint is fixedly connected to the bottom end of the connecting pipe, and the bottom end of the expansion joint is fixedly connected to the top end of the load-bearing support.

[0016] Optionally, the distance between the inner wall of the through hole and the pipe and the outer wall of the leg is in the range of 300-500mm.

[0017] In summary, this application includes the following beneficial technical effects:

[0018] The test chamber and the internal engine mounting platform maintain a clearance. The engine, mounted on the mounting platform, is independent of the test chamber. Low-frequency, low-amplitude vibrations of the test chamber are transmitted to the plant foundation (ground) through the test chamber support components. Due to the clearance between the test chamber and the internal engine mounting platform, vibrations from the test chamber are not transmitted to the engine through the mounting platform. Engine vibrations are transmitted to the concrete foundation (ground) of the platform through the engine mounting platform and its support components. Engine vibrations are not transmitted to the test chamber through the platform, thus avoiding coupling and mutual interference caused by the mutual transmission of engine vibration and test chamber vibration. This ensures the safe operation of the test equipment and guarantees the accuracy requirements for measuring engine performance parameters.

[0019] The use of expansion joints to connect the test bench through-cabin pipe and the load-bearing support not only meets the sealing requirements of the test bench leg through-cabin structure, but also absorbs some of the cabin vibration to a certain extent. This effectively solves the vibration problem between the test cabin and the engine mounting bench at the common action surface on the top plate of the load-bearing support, a feature that traditional test cabin and test bench connection methods do not have. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the test chamber and its support components in this application.

[0022] Figure 2 This is a structural schematic diagram of the engine mounting stand and stand support assembly for this application.

[0023] Explanation of reference numerals in the attached drawings: 1. Test chamber body; 2. Engine mounting platform; 3. Sliding support structure; 4. Fixed support; 5. Load-bearing frame; 6. Concrete support column; 7. Outrigger; 8. Connecting pipe; 9. Embedded beam; 10. Plant foundation; 11. Load-bearing support; 12. Expansion joint; 13. Concrete foundation of the platform; 14. Embedded bolt. Detailed Implementation

[0024] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0025] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0027] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0028] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0029] This application provides a cabin support structure for a high-altitude simulation test chamber.

[0030] like Figure 1 and Figure 2 As shown, a through-cabin support structure for a high-altitude simulation test chamber includes a test chamber body 1, a body support assembly, an engine mounting platform 2, and a platform support assembly. The test chamber body is mounted on a factory foundation 10 via multiple body support assemblies. A platform concrete foundation 13 is provided on the factory foundation 10 below the test chamber body 1. The engine mounting platform 2 is located inside the test chamber body 1, and a gap is maintained between the engine mounting platform 2 and the test chamber body 1. The engine mounting platform 2 is mounted on the platform concrete foundation 13 via multiple platform support assemblies that pass through the bottom of the test chamber body 1. The bottom sidewall of the test chamber body 1 has through holes for the platform support assemblies to pass through. A gap is provided between the engine mounting platform 2 and the test chamber body 1, and a gap is provided between the platform support assembly and the through holes. The edge of the through holes and the platform concrete foundation 13 are sealed and connected by a sealing sleeve assembly.

[0031] The test chamber 1 and the internal engine mounting platform 2 maintain a clearance. The engine mounting platform 2 is mounted on the concrete foundation 13 of the platform via a platform support assembly passing through the chamber. The test chamber 1 is mounted on the factory foundation 10 via the chamber support assembly. The engine mounting platform is not mounted on the structure of the test chamber itself. The engine mounted on the engine mounting platform 2 is independent of the test chamber. Low-frequency, low-amplitude vibrations of the test chamber 1 are transmitted to the factory foundation 10 (ground) through the chamber support assembly. Because the test chamber 1 and the internal engine mounting platform 2 maintain a clearance, the vibrations of the test chamber 1 are not transmitted to the engine through the engine mounting platform 2. The engine vibrations are transmitted to the concrete foundation 13 (ground) through the engine mounting platform 2 and the platform support assembly. The engine vibrations are not transmitted to the test chamber 1 through the engine mounting platform 2, thus avoiding coupling and mutual interference caused by the mutual transmission of engine vibrations and test chamber 1 vibrations. This ensures the safe operation of the test equipment and guarantees the accuracy requirements for measuring engine performance parameters.

[0032] The factory foundation 10 under the test chamber 1 has a groove, and the platform concrete foundation 13 is set in the groove. The platform concrete foundation 13 and the factory foundation 10 are constructed independently.

[0033] By distinguishing between the concrete foundation 13 of the test bench and the foundation 10 of the factory building, the coupling and mutual interference of multi-source vibrations are further resolved at the end of the vibration energy transmission, thus avoiding the superposition of vibrations between the engine and the test chamber.

[0034] The test chamber 1 has chamber support assemblies on both sides of its axis. Support assemblies are located at the air inlet, exhaust end, and axial center of the test chamber 1. Each support assembly includes a concrete support column 6 integrated with the plant foundation 10 and a load-bearing frame 5 fixed to the top of the concrete support column 6. The top of the load-bearing frame 5 is connected to the test chamber. Pre-embedded bolts 14 are provided on the concrete support column 6, and the load-bearing frame 5 is fixed to the concrete support column 6 by the pre-embedded bolts 14.

[0035] The support frames 5 at the air inlet and exhaust ends of the test chamber 1 are slidably connected to the test chamber 1. The support frame 5 at the axial center of the test chamber 1 is fixedly connected to the test chamber 1 by a fixed support 4. The air inlet and exhaust ends of the test chamber 1 slide relative to the support frame 5 on the horizontal plane. The sliding direction includes two vertical directions, one of which is parallel to the axial direction of the test chamber 1.

[0036] The air inlet, center and exhaust ends of the test chamber 1 are connected to the pre-embedded bolts 14 through their respective support frames 5 to form a whole. They are also connected to the factory foundation 10 through three sets of concrete support columns 6 to form an independent support system for the test chamber 1.

[0037] Sliding support structures 3 are installed on the support frames 5 at both the air inlet and exhaust ends of the test chamber 1. The fixed base of the sliding support structure 3 is installed on the support frame 5, and the free end of the sliding support structure 3 is fixedly connected to the test chamber 1. The free end is slidably installed on the base, and the sliding direction of the free end includes a first direction and a second direction that are perpendicular to each other. The first direction is parallel to the axial direction of the test chamber 1, and the second direction is parallel to the horizontal direction. Specifically, the sliding support structure 3 may include a base, a first slide rail fixedly installed on the base, a second slide rail installed on the first slide rail, and a free end installed on the slide rail. The first slide rail is perpendicular to the second slide rail, and the second slide rail is slidably installed on the first slide rail and slides along the first slide rail. The length direction of the first slide rail is perpendicular to the axial direction of the test chamber 1, and the length direction of the second slide rail is parallel to the horizontal plane. The free end is slidably installed on the second slide rail and slides along the second slide rail. The fixed base is installed on the support frame 5, and the free end is fixedly connected to the test chamber 1.

[0038] Based on the length of the test chamber 1, a sliding support structure 3 is designed for the air inlet and exhaust ends, which is required to absorb the axial and horizontal displacement caused by working pressure and temperature, as well as part of the weight of the test chamber 1.

[0039] Based on the working environment of the test chamber and the force transmission of the equipment connected to the front and rear, the load-bearing frame 5 at the axial center of the test chamber is designed to absorb the load generated by the working pressure of the test chamber, the blind plate force generated by the structural changes of the equipment connected to the front and rear of the test chamber 1, and part of the weight of the test chamber 1.

[0040] The engine mounting stand 2 is provided with the stand support assembly on both sides of the test chamber body 1 on opposite sides of the axis. The engine mounting stand is provided with a plurality of stand support assemblies distributed at intervals. The stand support assembly includes a leg 7 and a load-bearing support 11. The bottom end of the load-bearing support 11 is installed on the concrete foundation 13 of the stand. The top end of the load-bearing support 11 is fixedly connected to the bottom end of the leg 7. The leg 7 passes through the through hole. The top end of the leg 7 is fixedly connected to the engine mounting stand 2.

[0041] When designing the engine mounting stand 2, the support legs 7 should have sufficient rigidity. In addition to meeting the installation requirements of the maximum weight of the engine under test and the test equipment, a load-bearing margin of not less than 50% should be reserved. The design rigidity of the load-bearing support 11 should not be less than the rigidity of the engine mounting stand 2.

[0042] The concrete foundation 13 of the platform is provided with a pre-embedded beam 9, which is fixedly connected to the load-bearing support 11.

[0043] The embedded beams 9 at the same position along the axial direction of the test chamber body 1 are connected to the platform concrete foundation 13 by embedded steel bars. In one embodiment, the embedded beams 9 at the same position along the axial direction of the test chamber body 1 are U-shaped, and the two upward ends of the U-shaped embedded beams 9 are respectively connected to two load-bearing supports 11 on both sides at the same axial position. The load-bearing supports 11 and the embedded beams 9 are connected by bolts. The design stiffness and load-bearing capacity of the embedded beams 9 are not less than the stiffness of the load-bearing supports 11, and the platform concrete foundation 13 at the embedded beams 9 should be implemented separately from the plant foundation at the interface to maintain the independence of the foundation.

[0044] The test chamber body 1 is equipped with a connecting pipe 8 communicating with a through hole. The connecting pipe 8 extends downward from the test chamber body 1, and the support leg 7 passes through the connecting pipe 8. An expansion joint 12 is provided between the bottom end of the connecting pipe 8 and the top end of the load-bearing support 11, which is sleeved on the outer periphery of the support leg 7. The top end of the expansion joint 12 is fixedly connected to the bottom end of the connecting pipe 8, and the bottom end of the expansion joint 12 is fixedly connected to the top end of the load-bearing support 11. The distance between the inner wall of the through hole and the connecting pipe 8 and the outer wall of the support leg 7 is 300-500mm. The load-bearing support 11 and the chamber connecting pipe 8 are connected as a whole by the expansion joint 12 with a flange. The load-bearing support 11, the embedded beam 9, and the concrete foundation 13 of the platform form a whole, together forming the platform through-chamber support system.

[0045] The expansion joint 12 connects the test bench through-cabin pipe 8 and the load-bearing support 11, which not only meets the sealing requirements of the test bench leg 7 through-cabin structure, but also absorbs some of the cabin vibration to a certain extent. This effectively solves the vibration problem of the test cabin body 1 and the engine mounting platform 2 at the common action surface at the top plate of the load-bearing support 11. This is a feature that traditional test cabin and test bench connection methods do not have.

[0046] Based on the installation position of the engine mounting stand 2 within the test chamber 1 and the distribution of the legs 7, through holes and connecting pipes 8 are made at corresponding positions within the test chamber 1. The connecting pipes 8 are required to be flange-type connections, and their height should be sufficient to accommodate the installation space for connecting bolts. The inner diameter of the connecting pipes 8 should exceed the outer dimensions of the legs 7 of the engine mounting stand 2 by at least 300mm to meet the space requirements for internal adjustments during stand installation. The design of the expansion joint 12 between the engine mounting stand 2 and the load-bearing support 11 should prioritize the maximum deformation displacement in the direction of gravity and possess sufficient axial stiffness to absorb some of the vibration energy of the chamber.

[0047] In one embodiment, considering the needs of use and maintenance, the engine mounting platform 2 is connected to the outrigger 7, the outrigger 7 to the load-bearing support 11, the expansion joint 12 to the load-bearing support 11, and the expansion joint 12 to the cabin pipe 8 by flange-bolt connection, and a silicone rubber flat sealing gasket with the same working temperature as the test cabin 1 is provided at the flange mounting surface to prevent air leakage.

[0048] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A through-cabin support structure for a high-altitude simulation test chamber, characterized in that, The system includes a test chamber body, a body support assembly, an engine mounting platform, and a platform support assembly. The test chamber body is mounted on a factory foundation via multiple body support assemblies. A concrete foundation for the platform is located on the factory foundation below the test chamber body. The engine mounting platform is located inside the test chamber body, and a gap is maintained between the engine mounting platform and the test chamber body. The engine mounting platform is mounted on the platform concrete foundation via multiple platform support assemblies that pass through the bottom of the test chamber body. The bottom sidewall of the test chamber body has through holes for the platform support assemblies to pass through. A gap is provided between the engine mounting platform and the test chamber body, and a gap is provided between the platform support assemblies and the through holes. The edge of the through holes and the platform concrete foundation are sealed and connected by a sealing sleeve assembly. The test chamber is equipped with chamber support assemblies on both sides of the axis. The test chamber is equipped with chamber support assemblies at the air inlet, exhaust end and axial center. The chamber support assembly includes a concrete support column integrated with the factory foundation and a load-bearing frame fixed to the top of the concrete support column. The top of the load-bearing frame is connected to the test chamber. The load-bearing frames at the air inlet and exhaust ends of the test chamber are slidably connected to the test chamber body. The load-bearing frame at the axial center of the test chamber body is fixedly connected to the test chamber body. The air inlet and exhaust ends of the test chamber body slide relative to the load-bearing frames on the horizontal plane. The sliding direction includes two vertical directions, one of which is parallel to the axial direction of the test chamber body. The engine mounting stand is equipped with support assemblies on both sides of the test chamber's axis. The engine mounting stand has multiple support assemblies spaced apart. Each support assembly includes a leg and a load-bearing support. The bottom end of the load-bearing support is installed on the concrete foundation of the stand. The top end of the load-bearing support is fixedly connected to the bottom end of the leg. The leg passes through the through hole, and the top end of the leg is fixedly connected to the engine mounting stand. The test chamber body is provided with a connecting pipe communicating with the through hole. The connecting pipe extends downward from the test chamber body. The support leg passes through the connecting pipe. An expansion joint is provided between the bottom end of the connecting pipe and the top end of the load-bearing support, which is sleeved on the outer periphery of the support leg. The top end of the expansion joint is fixedly connected to the bottom end of the connecting pipe, and the bottom end of the expansion joint is fixedly connected to the top end of the load-bearing support.

2. The through-cabin support structure of the high-altitude simulation test chamber according to claim 1, characterized in that, The test chamber is located on the foundation of the factory building, and the test platform concrete foundation is installed in the groove. The test platform concrete foundation and the factory building foundation are constructed independently.

3. The through-cabin support structure of the high-altitude simulation test chamber according to claim 1, characterized in that, Sliding support structures are installed on the load-bearing frames at both the air inlet and exhaust ends of the test chamber. The fixed base of the sliding support structure is installed on the load-bearing frame, and the free end of the sliding support structure is fixedly connected to the test chamber. The free end is slidably installed on the base. The sliding direction of the free end includes a first direction and a second direction that are perpendicular to each other. The first direction is parallel to the axis of the test chamber, and the second direction is parallel to the horizontal direction.

4. The through-cabin support structure of the high-altitude simulation test chamber according to claim 1, characterized in that, The concrete foundation of the platform is equipped with an embedded beam, which is fixedly connected to the load-bearing support.

5. The through-cabin support structure of the high-altitude simulation test chamber according to claim 4, characterized in that, The embedded beams at the same position along the axis of the test chamber are connected by embedded steel bars on the concrete foundation of the test bench.

6. The through-cabin support structure of the high-altitude simulation test chamber according to claim 1, characterized in that, The distance between the inner wall of the through hole and the pipe and the outer wall of the support leg is 300-500mm.

Images