Outdoor engine test bed and method of installing same

Abstract

The application discloses an outdoor engine test bench and a mounting method thereof, and relates to the field of outdoor engine test benches, comprising: a stand column arranged on a pre-buried base; a cross beam, one end of the cross beam being connected with the top end of the stand column through a deformation connecting assembly, an engine connecting assembly being arranged on the cross beam, and the engine connecting assembly and the horizontal direction forming a certain included angle; the test bench considers the structure type and adjustment scheme of the suspension bracket during the installation process in the design interface, and a deformation connecting assembly is additionally arranged at the connection position of the stand column and the cross beam, so that the final installation position of the engine is as consistent as possible with the theoretical position point.

Description

Technical Field

[0001] This invention belongs to the field of outdoor engine test benches, and more specifically, relates to an outdoor engine test bench and its installation method. Background Technology

[0002] As the heart of an aircraft, engine research has always been highly valued by the aviation industry. Testing and verification are an indispensable part of the new aircraft development process, and whole-engine testing accounts for a considerable proportion of the testing and verification. To conduct whole-engine testing of aero engines, outdoor engine test stands are indispensable.

[0003] Existing outdoor engine test benches can adopt a single-column cantilever structure to reduce interference from various waves and improve the accuracy of noise, radar, and infrared measurements. The outdoor engine test bench mainly includes: a single-column cantilever main frame, an engine bench (conventional bench and vector bench), an engine control system, an electrical system, and a test process system. A schematic diagram is shown below. Figure 1 and Figure 2 .

[0004] The cantilever support is the most important component of the outdoor engine test bench. It primarily bears the thrust of the test specimen transmitted through the high-precision measuring platform, as well as the weight of the test specimen and the high-precision measuring platform itself. Simultaneously, it transfers the forces to the embedded base, making it the most crucial load-bearing structure of the entire test bench. Due to the machining precision of the cantilever support, the equipment's own weight, and the influence of external forces from auxiliary systems, the precise position of the engine after installation will inevitably differ from its theoretical position, ultimately affecting various measurement parameters of the engine.

[0005] Existing cantilever support structure designs do not consider the positional accuracy and adjustment measures after loading, resulting in certain deformation of the cantilever support after the measurement bench and engine are installed, making further adjustment impossible. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing an outdoor engine test bench and its installation method. The test bench takes into account the structural type and adjustment scheme of the suspension bracket during the design and installation process, and adds a deformation connection component at the connection between the column and the crossbeam to make the final installation position of the engine coincide as much as possible with the theoretical position.

[0007] To achieve the above objectives, the present invention provides an outdoor engine test bench, comprising:

[0008] The column is set on the pre-embedded base;

[0009] A crossbeam, one end of which is connected to the top of the column via a deformation connecting assembly, and an engine connecting assembly is provided on the crossbeam, the engine connecting assembly forming a certain angle with the horizontal direction.

[0010] Optionally, the deformable connection component includes:

[0011] The first oblique flange is connected to the top of the column on one side;

[0012] The second oblique flange is connected to one end of the crossbeam on one side, and the other side of the first oblique flange is connected to the other side of the second oblique flange.

[0013] Optionally, the inclination angle of the connection surfaces of the first and second inclined flanges is 45°, and an adjusting shim is provided between the first and second inclined flanges.

[0014] Optionally, the adjusting shim is disposed at the included angle between the inner sides of the first inclined flange and the second inclined flange.

[0015] Optionally, the first oblique flange and the second oblique flange are fastened by double-row bolts.

[0016] Optionally, a first reinforcing rib is provided between the column and the first inclined flange, and a second reinforcing rib is provided between the beam and the second inclined flange.

[0017] Optionally, the engine connection assembly includes:

[0018] Two connecting sleeves are evenly arranged along the length of the crossbeam, and a reinforcing rib is provided between the connecting sleeves;

[0019] Two pairs of connecting plates, each pair of connecting plates being disposed on the connecting sleeve along the width direction of the crossbeam.

[0020] Optionally, it may also include an engine control module, an electrical control module, and a test run process control module.

[0021] The present invention also provides an installation method for the outdoor engine test stand as described above, characterized by comprising the following steps:

[0022] Install columns on the pre-embedded base;

[0023] Install the deformation connection assembly at the top of the column and connect one end of the crossbeam;

[0024] Engine connection assembly on the crossbeam;

[0025] Adjust the deformation connection assembly according to the pre-deformation amount so that the engine connection assembly forms a certain angle with the horizontal direction.

[0026] Optionally, adjusting the pre-deformation amount of the deformable connection assembly includes:

[0027] During pre-processing, a first included angle is set on the connection surfaces of the first and second oblique flanges in the deformation connection assembly according to the theoretical sag;

[0028] During on-site installation, an adjusting shim is added between the first and second oblique flanges for secondary adjustment.

[0029] This invention provides an outdoor engine test stand and its installation method. Its advantages are as follows: the test stand is based on the cantilever support structure of the currently constructed outdoor engine test stand. The shortcomings of the previous method and the advantages of the improved method were analyzed, which greatly improves the efficiency and accuracy of similar cantilever support structures in the installation process.

[0030] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0031] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the invention.

[0032] Figure 1 A schematic diagram of the structure of an existing outdoor engine test stand is shown.

[0033] Figure 2 It shows Figure 1 The right view.

[0034] Figure 3 A schematic diagram of an outdoor engine test stand according to an embodiment of the present invention is shown.

[0035] Figure 4 A structural schematic diagram of a deformable connection assembly according to an embodiment of the present invention is shown.

[0036] Figure 5 A schematic diagram of the structure of an engine connection assembly according to an embodiment of the present invention is shown.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Column; 2. Horizontal beam; 3. Deformation connection assembly; 4. Engine connection assembly; 5. First oblique flange; 6. Second oblique flange; 7. Bolt; 8. Connecting sleeve; 9. Reinforcing rib; 10. Connecting plate. Detailed Implementation

[0039] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0040] This invention provides an outdoor engine test bench, comprising:

[0041] The column is set on the pre-embedded base;

[0042] The crossbeam has one end connected to the top of the column via a deformation connecting assembly. An engine connecting assembly is installed on the crossbeam, and the engine connecting assembly forms a certain angle with the horizontal direction.

[0043] Specifically, the test stand is largely the same as the existing outdoor engine test stand cantilever support structure. A deformation connection component has been added between the original column and crossbeam. Through certain theoretical calculations, the cantilever support structure is pre-deformed in the reverse direction during the manufacturing process. After the engine is loaded onto the engine connection component, the deformation caused by gravity cancels out the pre-deformed reverse direction, thus ensuring that the actual installation position of the engine coincides with the theoretical position. In addition, the test stand adopts separate manufacturing of the crossbeam and column, which facilitates the later installation and adjustment.

[0044] Optionally, the deformable connection component includes:

[0045] The first oblique flange is connected to the top of the column on one side;

[0046] The second oblique flange is connected to one end of the crossbeam on one side, and the other side of the first oblique flange is connected to the other side of the second oblique flange.

[0047] Optionally, the inclination angle of the connection surfaces of the first and second oblique flanges is 45°, and an adjusting shim is provided between the first and second oblique flanges.

[0048] Specifically, the deformation connection assembly includes two oblique flanges, which are connected to the column and the crossbeam respectively. The connection surface of the oblique flanges is 45°. This allows the pre-deformation of the crossbeam after installation to be estimated before installation. Then, during on-site installation, an adjustment shim is added at the connection between the first and second oblique flanges to adjust the angle, making it easier to get closer to the theoretical position when the engine is installed later.

[0049] Optionally, the adjusting shim is located at the included angle between the inner sides of the first and second angled flanges.

[0050] Specifically, in order to set a certain angle between the engine connection assembly on the crossbeam and the horizontal direction, adjusting shims are set at the inner angle of the two oblique flanges. This allows for the adjustment of the test bench with the least amount of adjusting shims while using the least effort, thereby achieving the reverse deformation setting of the test bench.

[0051] Optionally, the first and second oblique flanges are fastened with double-row bolts.

[0052] Optionally, a first reinforcing rib is provided between the column and the first oblique flange, and a second reinforcing rib is provided between the beam and the second oblique flange.

[0053] Specifically, double-row bolts and additional reinforcing ribs are used between the oblique flange and the column or beam to improve the connection strength of the oblique flange and ensure the stability of the test bench structure.

[0054] Optionally, the engine connection assembly includes:

[0055] Two connecting sleeves are evenly arranged along the length of the crossbeam, and reinforcing ribs are provided between the connecting sleeves;

[0056] Two pairs of connecting plates, each pair of connecting plates is set on the connecting sleeve along the width direction of the crossbeam.

[0057] Specifically, in order to ensure that the engine can be firmly connected to the crossbeam, two connecting sleeves are set up. Each connecting sleeve is equipped with a pair of connecting plates. The engine is connected and fixed by the two pairs of connecting plates, so that the weight of the engine is steadily applied to the crossbeam, which can offset the pre-set reverse deformation amount. The deformation amount set by the two pairs of connecting plates is also different, with the deformation amount of the connecting plate closer to the inclined flange being smaller than that of the connecting plate farther away from the inclined flange.

[0058] Optionally, it may also include an engine control module, an electrical control module, and a test run process control module.

[0059] Specifically, the test bench uses various control modules to perform performance tests on the engine, and the engine is installed at a location that coincides with the theoretical location, making the various measurement indicators more accurate.

[0060] The present invention also provides an installation method for the outdoor engine test stand as described above, characterized by comprising the following steps:

[0061] Install columns on the pre-embedded base;

[0062] Install the deformation connection assembly at the top of the column and connect one end of the crossbeam;

[0063] Engine connection assembly on the crossbeam;

[0064] Adjust the deformation connection assembly according to the pre-deformation amount so that the engine connection assembly forms a certain angle with the horizontal direction.

[0065] Optionally, adjusting the pre-deformation amount of the deformable connection assembly includes:

[0066] During pre-processing, a first included angle is set on the connection surfaces of the first and second oblique flanges in the deformation connection assembly according to the theoretical sag;

[0067] During on-site installation, an adjusting shim is added between the first and second oblique flanges for secondary adjustment.

[0068] Specifically, the installation method of this test bench first calculates the reserved tilt angle during the processing based on the theoretical deformation amount. During on-site installation, the weight of the crossbeam and column naturally sags, which cancels out the reserved reverse deformation amount. Then, the height of the engine connection assembly under the crossbeam is measured on-site to ensure that the levelness of the mounting plate on the same side does not exceed 0.5mm. If the requirements are not met, the mounting surface of the inclined flange is finely adjusted until the requirements are met. This greatly reduces the on-site installation workload and improves the installation accuracy and efficiency.

[0069] Example

[0070] like Figures 3 to 5 As shown, the present invention provides an outdoor engine test stand, comprising:

[0071] Column 1 is installed on the pre-embedded base;

[0072] The crossbeam 2 has one end connected to the top of the column 1 via a deformation connecting component 3. An engine connecting component 4 is provided on the crossbeam 2, and the engine connecting component 4 forms a certain angle with the horizontal direction.

[0073] In this embodiment, the deformation connection component 3 includes:

[0074] The first oblique flange 5 is connected to the top of the column 1 on one side;

[0075] The second oblique flange 6 is connected to one end of the crossbeam 2 on one side, and the other side of the first oblique flange 5 is connected to the other side of the second oblique flange 6.

[0076] In this embodiment, the inclination angle of the connecting surfaces of the first oblique flange 5 and the second oblique flange 6 is 45°, and an adjusting shim is provided between the first oblique flange 5 and the second oblique flange 6.

[0077] In this embodiment, the adjusting shim is located at the included angle between the inner sides of the first oblique flange 5 and the second oblique flange 6.

[0078] In this embodiment, the first oblique flange 5 and the second oblique flange 6 are fastened by double-row bolts 7.

[0079] In this embodiment, a first reinforcing rib is provided between the column 1 and the first oblique flange 5, and a second reinforcing rib is provided between the beam 2 and the second oblique flange 5.

[0080] In this embodiment, the engine connection assembly includes four components:

[0081] Two connecting sleeves 8 are evenly arranged along the length of the crossbeam 2, and a reinforcing rib 9 is provided between the connecting sleeves 8;

[0082] Two pairs of connecting plates 10 are provided on the connecting sleeve 8 along the width direction of the crossbeam 2.

[0083] In this embodiment, an engine control module, an electrical control module, and a test run process control module are also included.

[0084] The present invention also provides an installation method for the outdoor engine test stand as described above, characterized by comprising the following steps:

[0085] Install column 1 on the pre-embedded base;

[0086] Install the deformation connection component 3 at the top of column 1 and connect one end of the crossbeam 2;

[0087] Engine connection assembly 4 on crossbeam 2;

[0088] Adjust the deformation connection assembly 3 according to the pre-deformation amount so that the engine connection assembly 4 forms a certain angle with the horizontal direction.

[0089] In this embodiment, adjusting the pre-deformation amount of the deformation connection component 3 includes:

[0090] During pre-processing, a first included angle is set on the connection surface of the first oblique flange 5 and the second oblique flange 6 in the deformation connection assembly according to the theoretical sag;

[0091] During on-site installation, an adjusting shim is added between the first oblique flange 5 and the second oblique flange 6 for secondary adjustment.

[0092] In summary, the test stand includes a column 1 and a crossbeam 2, which are connected by a deformation connection assembly 3. The connection surface of the inclined flange is a machined surface, and the angle of the inclined flange is 45°. The second inclined flange 6 is welded and fixed to the end of the crossbeam, and the first inclined flange 5 is welded and fixed to the top of the column. Because the engine will sag due to gravity after installation, the pre-deformation of the crossbeam after installation must be estimated in advance. The measures taken are: a. Based on the theoretical sag, a certain angle of inclination is pre-machined when machining the two inclined flanges; b. During on-site installation, shims are added at the connection between the crossbeam and the column inclined flanges for secondary adjustment. Taking the direction from the engine centerline to the ground as +Z (vertical direction), and the center height of the test piece as 7m, the distance from the center of the test piece to the center of the column is also 7m. Assuming the engine load weight is 550kN (+Z direction), the loading... The location is on two pairs of connecting plates. Theoretical calculations show that during the static loading test, the maximum deformation (Z-direction) of beam 2 is approximately 10mm, located at the first connection point of the pair of connecting plates furthest from the deformation connection assembly, while the minimum deformation is approximately 6mm, located at the first connection point of the pair of connecting plates closest to the deformation connection assembly. When machining the inclined flange surfaces of column 1 and beam 2, a certain inclination angle is reserved in advance so that the distance between the first connection point and the theoretical plane in the natural state after installation is approximately 12mm, which is calculated to be a reserve of approximately 6.5mm between the two inclined flanges. During on-site installation, the natural downward sag of the beam and column due to their weight cancels out the reserved reverse deformation. The height of the connecting plate below the beam is then measured on-site to ensure that the levelness of the mounting plate on the same side does not exceed 0.5mm. If the requirements are not met, the inclined flange mounting surface is finely adjusted until the requirements are met.

[0093] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An outdoor engine test bench, characterized in that, include: The column is set on the pre-embedded base; A crossbeam, one end of which is connected to the top of the column via a deformation connecting assembly, and an engine connecting assembly is provided on the crossbeam, the engine connecting assembly forming a certain angle with the horizontal direction; The deformable connection component includes: The first oblique flange is connected to the top of the column on one side; The second oblique flange is connected to one end of the crossbeam on one side, and the other side of the first oblique flange is connected to the other side of the second oblique flange. The inclination angle of the connection surfaces of the first and second oblique flanges is 45°, and an adjusting shim is provided between the first and second oblique flanges; The adjusting shim is located at the included angle between the inner sides of the first oblique flange and the second oblique flange; The first oblique flange and the second oblique flange are fastened by double-row bolts.

2. The outdoor engine test stand according to claim 1, characterized in that, A first reinforcing rib is provided between the column and the first oblique flange, and a second reinforcing rib is provided between the beam and the second oblique flange.

3. The outdoor engine test stand according to claim 1, characterized in that, The engine connection assembly includes: Two connecting sleeves are evenly arranged along the length of the crossbeam, and a reinforcing rib is provided between the connecting sleeves; Two pairs of connecting plates, each pair of connecting plates being disposed on the connecting sleeve along the width direction of the crossbeam.

4. The outdoor engine test stand according to claim 1, characterized in that, It also includes an engine control module, an electrical control module, and a test run process control module.

5. A method for installing an outdoor engine test stand as described in any one of claims 1-4, characterized in that, Includes the following steps: Install columns on the pre-embedded base; Install the deformation connection assembly at the top of the column and connect one end of the crossbeam; Install the engine connection assembly on the crossbeam; Adjust the deformation connection assembly according to the pre-deformation amount so that the engine connection assembly forms a certain angle with the horizontal direction.

6. The installation method of the outdoor engine test stand according to claim 5, characterized in that, The pre-deformation amount adjusts the deformation connection assembly, including: During pre-processing, a first included angle is set on the connection surfaces of the first and second oblique flanges in the deformation connection assembly according to the theoretical sag; During on-site installation, an adjusting shim is added between the first and second oblique flanges for secondary adjustment.

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