Movable frame device for high-power turboprop engine test bed and engine test bed

Abstract

The invention discloses a movable frame device for a high-power turboprop engine test bed and the engine test bed. The movable frame device comprises a movable frame framework, a front mounting seat and a counterweight system. The movable frame framework is arranged below the static frame device and used for being connected with the static frame device through a plurality of spring pieces arranged on the periphery of the movable frame framework, and then the rack system used for measuring the thrust of the turboprop engine is formed. The front mounting seat is used for being connected with an engine mounting rack for mounting a turboprop engine in a fast mounting manner so as to mount and support the turboprop engine to be measured. And the counterweight system is used for balancing the total weight of the turboprop engine and the engine mounting frame, so that the gravity center of the rack system is positioned in the center defined by the plurality of spring pieces. According to the movable frame device, the air inlet flow field of the propeller is not influenced by the size of the frame of the movable frame device, so that the engine performance is not influenced, the test result is high in accuracy, the test is safe and reliable, and the installation position of the propeller does not interfere with the structure of the movable frame device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aero-engine ground test device, in particular to a movable rack device for a high-power turboprop engine test stand. BACKGROUND

[0002] Ground bench test is an important means of aero-engine development, and a ground test completely simulating the installed state can more accurately provide important data for the first flight of the engine. Therefore, it is essential to build a ground test device completely simulating the installed state, and the movable rack device is an important component of the test device.

[0003] The movable rack device of the existing thrust measurement stand is usually of a long "mouth" type structure, and the movable rack device is usually less than 2m x 3m. The engine is usually installed directly below the movable rack device. This assembly form is suitable for thrust measurement when the engine is not tested with a propeller, and can effectively adapt to the test of turbojet and turbofan engines.

[0004] When the engine with a propeller is tested, due to the huge propeller airflow and the large torque generated during rotation compared with the conventional thrust type engine, the diameter of the propeller can reach 4-5m. When the existing movable rack device is used to install the engine directly below, there is certain interference between the movable rack and the propeller structure, and the movable rack system device also generates turbulence and interference to the exhaust flow field generated by the rotation of the propeller, thereby affecting the performance of the engine, leading to inaccurate test results, and even the risk of propeller fracture, so that the use requirements cannot be met. Therefore, a new type of movable rack device needs to be designed to meet the test requirements of the engine with a propeller. SUMMARY

[0005] The present application provides a movable rack device for a high-power turboprop engine test stand and an engine test stand to solve the technical problem that the existing movable rack device has certain interference between the movable rack and the propeller structure, and the movable rack system device also generates turbulence and interference to the exhaust flow field generated by the rotation of the propeller, thereby affecting the performance of the engine, leading to inaccurate test results, and even the risk of propeller fracture, so that the use requirements cannot be met.

[0006] The technical solution adopted by the present application is as follows: A dynamic frame device for a high-power turboprop engine test bench includes: a dynamic frame skeleton, and a front mounting base and a counterweight system respectively connected to the front and rear ends of the dynamic frame skeleton; the dynamic frame skeleton is disposed below the stationary frame device for connecting to the stationary frame device through multiple spring plates arranged on its outer periphery, thereby forming a test bench system for thrust measurement of the turboprop engine; the front mounting base is used for quick-connect connection with the engine mounting bracket for mounting the turboprop engine to support the turboprop engine to be measured; the counterweight system is used to balance the total weight of the turboprop engine and the engine mounting bracket, thereby making the center of gravity of the test bench system located at the center surrounded by the multiple spring plates.

[0007] Furthermore, the moving frame includes a square frame and a mounting frame fixedly connected to the bottom surface of the frame; each of the four apex corners of the frame has a spring plate mounting hole for mounting spring plates, so that the center of gravity of the bench system is located at the center of the frame; each of the four apex corners of the frame has a safety pin mounting hole for mounting a safety pin connecting it to the stationary frame device; the front mounting base and the counterweight system are respectively located at the front and rear ends of the mounting frame, and are fixedly connected to the frame and the mounting frame respectively.

[0008] Furthermore, the front mounting base is plate-shaped and is fixedly connected to the front end of the mounting frame by several fastening bolts; the front mounting base is also provided with several engine mounting bracket quick-connect positions to correspond to several quick-connect holes on the engine mounting bracket, so as to install a quick-connect device for quick-connecting the engine mounting bracket to the front mounting base.

[0009] Furthermore, the mounting frame is hollow to form a quick-connect mounting plate position for installing the quick-connect plate; the front mounting base is provided with a through hole that penetrates the plate surface to connect to the hollow cavity of the mounting frame, so that the pipelines and pipes connecting the turboprop engine pass through the through hole and enter the mounting frame to connect to the quick-connect plate.

[0010] Furthermore, the side projection of the mounting frame is trapezoidal, formed by connecting several first mounting rods, and the connected first mounting rods are connected as a whole by first reinforcing ribs to form an adaptive stress-reinforcing zone within the mounting frame; a second reinforcing rib is also provided between the mounting frame and the skeleton frame to connect the two, and the second reinforcing rib has through holes provided through the plate surface for the pipelines and pipes connecting the engine to pass through; the skeleton frame is formed by connecting the first skeleton rod, the second skeleton rod, the third skeleton rod and the fourth skeleton rod in sequence end to end, the mounting frame is located at the center of the skeleton frame, and the top of the mounting frame extends into the skeleton frame and connects the opposite second skeleton rod and the fourth skeleton rod, and the top of the mounting frame is also provided with a thrust sensor mounting hole for mounting a thrust sensor and a calibration sensor mounting hole for mounting a calibration sensor.

[0011] Furthermore, the counterweight system is a first counterweight system, which includes a counterweight mounting frame and several counterweight blocks; the inner end of the counterweight mounting frame is fixed to the rear end of the moving frame frame, and the outer end of the counterweight mounting frame extends outward to form a cantilever end; several counterweight blocks are stacked and installed on the cantilever end of the counterweight mounting frame.

[0012] Furthermore, the side projection of the counterweight mounting frame is triangular, formed by connecting several second mounting rods. The counterweight mounting frame is connected to the mounting frame to form a triangular-like frame. The connected second mounting rods are also connected to each other by a third reinforcing rib to form an adaptive stress reinforcement zone within the counterweight mounting frame. The cantilever end of the counterweight mounting frame has a horizontal support surface and multiple mounting pins at both ends perpendicular to the horizontal width direction of the support surface. The two ends of the counterweight block are respectively inserted through the multiple mounting pins at both ends.

[0013] Furthermore, the counterweight system is a second counterweight system, which includes two sets of parallel and spaced slide rails and two sets of electrically driven sliders that are slidably mounted on the two sets of slide rails respectively; the inner end of each set of slide rails is fixedly connected to the rear end of the moving frame skeleton, and the outer end of each set of slide rails extends outward to form a cantilever end; the two sets of electrically driven sliders are respectively connected to the controller of the test bench system.

[0014] Furthermore, the slide rail has a "T" shaped cross-section with graduations extending along its length; the electrically driven slider includes a slider body slidably mounted on the slide rail, a drive motor and a position sensor connected within the slider body, and two guide sliders fixed at both ends of the slider body in the sliding direction; the drive motor and the position sensor are respectively connected to the controller; the two guide sliders are respectively connected to the slide rail to limit and guide the sliding of the slider body.

[0015] According to another aspect of the present invention, an engine test stand is also provided, including a moving frame device for a high-power turboprop engine test stand as described in any of the above.

[0016] The present invention has the following beneficial effects: A high-power turboprop engine test stand, because the turboprop engine test completely simulates the installed state, with propeller airflow reaching 1800 kg / s, requires a moving frame device designed in this invention to reduce the impact of the test stand system on the airflow, thus meeting the testing requirements of high-power turboprop engines. Compared to the original moving frame device, the moving frame device of this invention is located below the stationary frame device and is connected to the stationary frame device through multiple spring plates set on the outer periphery. Furthermore, the installation position of the engine and mounting bracket has changed from directly below the original moving frame device to the front end of the front mounting seat of this invention (viewed along the engine intake airflow direction). This changes the assembly form of the engine and its mounting bracket with the moving frame device from the original top-bottom arrangement to the current front-rear arrangement, adapting to the propeller aerodynamic flow field. Test requirements: When conducting propeller engine tests, the propeller's intake airflow field will not be affected by the size of the moving frame, thus not affecting engine performance. The test results are highly accurate and the test is safe and reliable. At the same time, the propeller installation position will not interfere with the moving frame structure. On the other hand, to ensure the stability of the engine's center of gravity, the moving frame has a counterweight system. The counterweight system is used to balance the total weight of the turboprop engine and the engine mounting bracket, thereby placing the center of gravity of the test bench system at the center surrounded by multiple spring plates to ensure test accuracy. At the same time, the counterweight system can also achieve rapid counterweighting when installing different engine models. Therefore, when changing to different engine models, only the engine mounting bracket needs to be replaced, not the moving frame. Thus, the moving frame device of this invention has wide adaptability.

[0017] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the spatial structure of the moving frame device for a high-power turboprop engine test stand according to a preferred embodiment of the present invention. Figure 2 yes Figure 1 A schematic diagram of the right-side view structure; Figure 3 yes Figure 1 The main view; Figure 4 yes Figure 1 A schematic diagram of the spatial structure of the second embodiment of the counterweight system; Figure 5 yes Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0019] Legend: 1. Frame frame; 101. Spring plate mounting hole; 102. Safety pin mounting hole; 11. First frame rod; 12. Second frame rod; 13. Third frame rod; 14. Fourth frame rod; 2. Mounting frame; 201. Pipeline quick-connect mounting plate position; 202. Thrust sensor mounting hole position; 203. Calibration sensor mounting hole position; 21. First mounting rod; 22. First reinforcing rib; 3. Second reinforcing rib; 4. Front mounting bracket; 401. Engine mounting bracket quick-connect position; 5. First counterweight system; 51. Counterweight mounting frame; 52. Counterweight block; 53. Mounting pin; 6. Second counterweight system; 61. Slide rail; 62. Electrically driven slider; 621. Guide slider. Detailed Implementation

[0020] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] Those skilled in the art will understand that, unless specifically stated otherwise, the term "comprising" as used in this specification means the presence of the stated features, integers, steps, operations, components, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, components, and / or combinations thereof. It should be understood that when we say a component is "connected" to another component, it can be directly connected to the other component or connected via an intermediate component. The term "and / or" as used herein includes all or any unit and all combinations of one or more associated listed items. The terms "first" and "second," etc., in this specification and claims are used to distinguish different objects, not to describe a particular order.

[0022] Reference Figure 1A preferred embodiment of the present invention provides a moving frame device for a high-power turboprop engine test bench, comprising: a moving frame skeleton, and a front mounting seat 4 and a counterweight system respectively connected to the front and rear ends of the moving frame skeleton. The moving frame skeleton is disposed below the stationary frame device for connection to the stationary frame device via multiple spring plates arranged around its outer periphery, thereby forming a test bench system for thrust measurement of the turboprop engine. The front mounting seat 4 is used for quick-connect connection with the engine mounting bracket for mounting the turboprop engine to support the turboprop engine to be measured. The counterweight system is used to balance the total weight of the turboprop engine and the engine mounting bracket, thereby ensuring that the center of gravity of the test bench system is located at the center surrounded by the multiple spring plates.

[0023] A high-power turboprop engine test stand, because the turboprop engine test completely simulates the installed state, with propeller airflow reaching 1800 kg / s, requires a moving frame device to reduce the impact of the test stand system on the airflow. This invention designs a moving frame device for a high-power turboprop engine test stand to meet the testing requirements of high-power turboprop engines. Compared to the original moving frame device, the moving frame device of this invention is located below the stationary frame device and is connected to the stationary frame device through multiple spring plates on its outer periphery. Furthermore, the installation position of the engine and mounting bracket changes from directly below the original moving frame device to the front end of the front mounting seat 4 of this invention (viewed along the engine intake airflow direction). This changes the assembly form of the engine and its mounting bracket with the moving frame device from the original top-bottom arrangement to the current front-rear arrangement to adapt to the propeller aerodynamic flow field. Test requirements: When conducting propeller engine tests, the propeller's intake airflow field will not be affected by the size of the moving frame, thus not affecting engine performance. The test results are highly accurate and the test is safe and reliable. At the same time, the propeller installation position will not interfere with the moving frame structure. On the other hand, to ensure the stability of the engine's center of gravity, the moving frame has a counterweight system. The counterweight system is used to balance the total weight of the turboprop engine and the engine mounting bracket, thereby placing the center of gravity of the test bench system at the center surrounded by multiple spring plates to ensure test accuracy. At the same time, the counterweight system can also achieve rapid counterweighting when installing different engine models. Therefore, when changing to different engine models, only the engine mounting bracket needs to be replaced, not the moving frame. Thus, the moving frame device of this invention has wide adaptability.

[0024] Optionally, such as Figure 1As shown, the moving frame includes a square frame 1 and a mounting frame 2 fixedly connected to the bottom surface of the frame 1. In this optional embodiment, the frame 1 and the mounting frame 2 are each welded from multiple square steel bars, resulting in a robust and reliable structure. Each of the four corners of the frame 1 has a spring plate mounting hole 101 for mounting spring plates, ensuring that the center of gravity of the platform system is located at the center of the frame 1. Each of the four corners of the frame 1 has a safety pin mounting hole 102 for mounting a safety pin connecting it to the stationary frame device. The front mounting base 4 and the counterweight system are located at the front and rear ends of the mounting frame 2, respectively, and are simultaneously fixedly connected to the frame 1 and the mounting frame 2. In this optional solution, since the propeller of the high-power turboprop engine is larger than 4m, the propeller will generate huge torque when it is working. In order to reduce the influence of thrust measurement, the horizontal spacing of the spring plates should not be less than the propeller size. Therefore, the width of the frame frame 1 in this invention is significantly increased compared with the traditional moving frame device, reaching more than 4m. The spring plate mounting hole 101 is used to connect the spring plates of the stationary frame, and the safety pin mounting hole 102 is used to install the safety pin, which plays a protective role when the spring plate fails.

[0025] Optionally, such as Figure 1 As shown, the front mounting base 4 is plate-shaped and is fixedly connected to the front end of the mounting frame 2 by several fastening bolts. The front mounting base 4 is also provided with several engine mounting bracket quick-connect positions 401, corresponding to several quick-connect holes on the engine mounting bracket, for installing a quick-connect device for quickly connecting the engine mounting bracket to the front mounting base 4. In this optional embodiment, when the engine is installed, the engine mounting bracket is installed on the front mounting base 4, and the engine mounting bracket quick-connect positions 401 are used to install the quick-connect device. The engine mounting bracket has corresponding quick-connect holes. When the engine and engine mounting bracket are hoisted as a whole to the assembly point in front of the moving frame device, the quick-connect device is activated, and the engine mounting bracket is fixed to the front mounting base 4 by hydraulic clamping.

[0026] Preferably, such as Figure 1 As shown, the mounting frame 2 is hollow, forming a quick-connect mounting plate position 201 for installing quick-connect plates. The front mounting base 4 has through holes penetrating the plate surface to connect to the hollow cavity of the mounting frame 2. This allows pipelines and pipes connecting to the turboprop engine to pass through these through holes and enter the mounting frame 2 to connect to the quick-connect plates. During actual installation, the quick-connect mounting plate position 201 is installed in the central cavity of the mounting frame 2. All external equipment measuring points and pipelines of the engine are mounted on this quick-connect plate. Identical quick-connect plates are also installed on the engine mounting bracket, and the pipe holes within the quick-connect plates connect to the engine.

[0027] Preferably, such as Figures 1-3As shown, the side projection of the mounting frame 2 is trapezoidal, formed by connecting several first mounting rods 21, and the connected first mounting rods 21 are connected as a whole by first reinforcing ribs 22 to form a stress-reinforcing zone within the mounting frame 2. Figure 2 (The dotted line section) This design improves the overall stability of the moving frame skeleton and reduces stress concentration during assembly and testing. A second reinforcing rib 3 connects the mounting frame 2 and the frame frame 1. The second reinforcing rib 3 has through holes penetrating the plate surface for the passage of engine pipelines and conduits. This structure increases the overall stability of the moving frame skeleton, and the through holes on the second reinforcing rib 3 also serve for threading and fixing pipelines required for engine testing. The frame frame 1 is formed by sequentially connecting the first frame rod 11, the second frame rod 12, the third frame rod 13, and the fourth frame rod 14. The mounting frame 2 is located at the center of the frame frame 1, and its top extends into the frame frame 1, connecting the opposing second frame rod 12 and fourth frame rod 14. The top of the mounting frame 2 also has a thrust sensor mounting hole 202 for mounting a thrust sensor and a calibration sensor mounting hole 203 for mounting a calibration sensor.

[0028] Optionally, in a first embodiment of the counterweight system, such as Figures 1-3 As shown, the counterweight system is a first counterweight system 5, which includes a counterweight mounting frame 51 and several counterweight blocks 52. The inner end of the counterweight mounting frame 51 is fixed to the rear end of the moving frame frame, and the outer end of the counterweight mounting frame 51 extends outward to form a cantilever end. Several counterweight blocks 52 are stacked and installed on the cantilever end of the counterweight mounting frame 51. In this optional scheme, since the high-power turboprop engine needs to adopt a cantilever structure, in order to ensure the accuracy of thrust measurement, it is necessary to ensure that the center of gravity of the moving frame device after assembling the engine and engine mounting bracket is in the middle position of the four spring plates. Therefore, the first counterweight system 5 of this invention is designed to balance the forward shift of the center of gravity caused by the engine cantilever.

[0029] In this optional solution, such as Figure 2 and Figure 3 As shown, the side projection of the counterweight mounting frame 51 is triangular, formed by connecting several second mounting rods. The counterweight mounting frame 51 connects to the mounting frame 2 to form a triangular-like frame, thereby stabilizing the overall structure of the moving frame device. The connected second mounting rods are also connected as a whole by third reinforcing ribs to form a stress-reinforcing zone within the counterweight mounting frame 51 (such as...). Figure 2(As shown by the dashed line in the middle), this design can improve the overall stability of the counterweight mounting frame 51 and reduce stress concentration during assembly and testing. The cantilever end of the counterweight mounting frame 51 has a horizontal support surface and multiple mounting pins 53 perpendicular to the transverse width direction of the support surface. The two ends of the counterweight block 52 are respectively inserted through the multiple mounting pins 53 at both ends.

[0030] In specific embodiments of this optional solution, such as Figure 2 and Figure 3 As shown, the counterweight 52 is rectangular in shape, with holes around its perimeter that match the mounting pins 53. It also features a centrally symmetrical structure, thinner in the middle and thicker at the sides. This design facilitates easy placement and removal of the counterweights 52 when adjusting their quantity. In this invention, the counterweight system as a whole is used to balance the center of gravity shift of the test bench system during engine installation. Based on the total weight of the engine and engine mounting bracket, the number of rear-end counterweights 52 is adjusted using the lever principle to achieve different counterweight weights. This ensures that the center of gravity of the overall test bench system structure remains located between the four spring plates, thus not affecting the thrust measurement accuracy.

[0031] Optionally, a second embodiment of the counterweight system, such as Figure 4 and Figure 5 As shown, the counterweight system is a second counterweight system 6, which includes two sets of parallel, spaced-apart slide rails 61 and two sets of electrically driven sliders 62 slidably mounted on the two sets of slide rails 61. The inner end of each set of slide rails 61 is fixedly connected to the rear end of the moving frame skeleton, and the outer end of each set of slide rails 61 extends outward to form a cantilever end. The two sets of electrically driven sliders 62 are respectively connected to the controller of the test bench system.

[0032] In this optional embodiment, the slide rail 61 has a "T"-shaped cross-section with graduations extending along its length. The electrically driven slider 62 includes a slider body slidably mounted on the slide rail 61, a drive motor and a position sensor connected within the slider body, and two guide sliders 621 fixed at both ends of the slider body in the sliding direction. The drive motor and position sensor are respectively connected to a controller. The two guide sliders 621 are respectively connected to the slide rail 61 to limit and guide the sliding of the slider body.

[0033] In a specific embodiment of this optional solution, a T-shaped groove slide rail 61 is welded parallel to the engine's central axis. The slide rail 61 is marked with graduations to display the distance between the electrically driven slider 62 and the center of gravity of the test bench system. It also features laser positioning and allows control of the position of the electrically driven slider 62 from the test bench operating terminal. During testing, based on the center of gravity position formed by the weight of the engine and mounting bracket, a specific movement command is issued from the test bench using the lever principle. The drive motor inside the electrically driven slider 62 drives the slider body to move on the slide rail 61. The position sensor reflects the position to the controller in real time, adjusting the distance between the center of gravity of the electrically driven slider 62 and the center of gravity of the test bench system on the engine's vertical plane, ensuring that the center of gravity of the overall structure of the test bench system remains vertical. When testing with different engine models, the relative position of the electrically driven slider 62 can be fine-tuned within the control system according to the weight of the engine and test bench. Compared to the first embodiment, this counterweight method allows for faster and more precise rapid counterweighting during engine installation.

[0034] Optionally, a preferred embodiment of the present invention also provides an engine test stand, including a moving frame device for a high-power turboprop engine test stand as described above. Thus, in the engine test stand of the present invention, the assembly form of the engine and its mounting bracket with the moving frame device changes from the original top-bottom configuration to the current front-to-back configuration, to adapt to the requirements of propeller aerodynamic flow field testing. When conducting propeller-driven engine tests, the propeller's intake airflow field is not affected by the size of the moving frame device frame, and therefore does not affect engine performance. The test results are highly accurate and the tests are safe and reliable. Simultaneously, the propeller mounting position does not interfere with the structure of the moving frame device. On the other hand, to ensure the stability of the engine's center of gravity, the moving frame device in the test stand of the present invention has a counterweight system. The counterweight system is used to balance the total weight of the turboprop engine and the engine mounting bracket, thereby ensuring that the center of gravity of the test stand system is located at the center surrounded by multiple spring plates, thus ensuring test accuracy. Simultaneously, the counterweight system can also achieve rapid counterweighting when installing different engine models. Therefore, when changing to different engine models, only the engine mounting bracket needs to be replaced, not the moving frame device. Therefore, the test stand of the present invention has wide adaptability.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A moving frame device for a high-power turboprop engine test stand, characterized in that, include: The moving frame, and the front mounting base (4) and counterweight system respectively connected to the front and rear ends of the moving frame; The moving frame is located below the stationary frame device to be connected to the stationary frame device via multiple spring plates arranged around its outer periphery, thereby forming a test bench system for measuring the thrust of a turboprop engine. The front mounting bracket (4) is used for quick connection with the engine mounting bracket for mounting the turboprop engine to install and support the turboprop engine to be measured. The counterweight system is used to balance the total weight of the turboprop engine and the engine mounting bracket, thereby placing the center of gravity of the test bench system at the center surrounded by multiple spring plates.

2. The moving frame device for a high-power turboprop engine test stand according to claim 1, characterized in that, The moving frame includes a square frame (1) and a mounting frame (2) fixedly connected to the bottom surface of the frame (1). The four corners of the frame (1) are provided with spring plate mounting holes (101) for mounting spring plates, so that the center of gravity of the bench system is located at the center of the frame (1). The upper surface of each of the four top corners of the frame frame (1) is provided with a safety pin mounting hole (102) for installing a safety pin that connects it to the stationary frame device. The front mounting base (4) and the counterweight system are located at the front and rear ends of the mounting frame (2), and are respectively fixedly connected to the skeleton frame (1) and the mounting frame (2).

3. The moving frame device for a high-power turboprop engine test stand according to claim 2, characterized in that, The front mounting base (4) is plate-shaped and is fixedly connected to the front end of the mounting frame (2) by several fastening bolts; The front mounting base (4) is also provided with a number of engine mounting bracket quick-connect positions (401) to correspond to a number of quick-connect holes on the engine mounting bracket, so as to install a quick-connect device for quick-connecting the engine mounting bracket to the front mounting base (4).

4. The moving frame device for a high-power turboprop engine test stand according to claim 2, characterized in that, The mounting frame (2) is hollow so that a quick-connect mounting plate position (201) for installing the quick-connect plate is formed inside. The front mounting base (4) is provided with a through hole that penetrates the plate surface to connect the hollow cavity of the mounting frame (2), so that the pipelines and pipes connecting the turboprop engine can pass through the through hole and enter the mounting frame (2) to connect to the pipeline quick-connect plate.

5. The moving frame device for a high-power turboprop engine test stand according to claim 2, characterized in that, The side projection of the mounting frame (2) is trapezoidal, formed by connecting several first mounting rods (21), and the first mounting rods (21) connected together are connected as a whole by first reinforcing ribs (22) to form an adaptive stress reinforcement zone in the mounting frame (2); A second reinforcing rib (3) is provided between the mounting frame (2) and the skeleton frame (1) to connect the two. The second reinforcing rib (3) is provided with a through hole that penetrates the plate surface so that pipelines and pipes connecting the engine can pass through. The skeleton frame (1) is formed by connecting the first skeleton rod (11), the second skeleton rod (12), the third skeleton rod (13) and the fourth skeleton rod (14) in sequence. The mounting frame (2) is located at the center of the skeleton frame (1), and the top of the mounting frame (2) extends into the skeleton frame (1) and connects the opposite second skeleton rod (12) and fourth skeleton rod (14). The top of the mounting frame (2) is also provided with a thrust sensor mounting hole (202) for mounting a thrust sensor and a calibration sensor mounting hole (203) for mounting a calibration sensor.

6. The moving frame device for a high-power turboprop engine test stand according to claim 1, characterized in that, The counterweight system is a first counterweight system (5), which includes a counterweight mounting frame (51) and several counterweight blocks (52). The inner end of the counterweight mounting frame (51) is fixed to the rear end of the moving frame frame, and the outer end of the counterweight mounting frame (51) extends outward to form a cantilever end. Several counterweights (52) are stacked and installed on the cantilever end of the counterweight mounting frame (51).

7. The moving frame device for a high-power turboprop engine test stand according to claim 6, characterized in that, The side projection of the counterweight mounting frame (51) is triangular, which is formed by connecting several second mounting rods. The counterweight mounting frame (51) is connected to the mounting frame (2) to form a triangular frame. The second mounting rods connected to each other are also connected into a whole by a third reinforcing rib to form an adaptive stress reinforcement zone in the counterweight mounting frame (51); The cantilever end of the counterweight mounting frame (51) has a horizontal support surface and multiple mounting pins (53) perpendicular to the horizontal width direction of the support surface. The two ends of the counterweight block (52) are respectively mounted on the multiple mounting pins (53) at both ends.

8. The moving frame device for a high-power turboprop engine test stand according to claim 1, characterized in that, The counterweight system is a second counterweight system (6), which includes two sets of slide rails (61) arranged in parallel intervals, and two sets of electrically driven sliders (62) respectively slidably mounted on the two sets of slide rails (61). The inner end of each set of slide rails (61) is fixedly connected to the rear end of the moving frame skeleton, and the outer end of each set of slide rails (61) extends outward to form a cantilever end. Two sets of electrically driven sliders (62) are respectively connected to the controller of the test bench system.

9. The moving frame device for a high-power turboprop engine test stand according to claim 8, characterized in that, The slide rail (61) has a "T" shaped cross section and has scales that extend along its length. The electrically driven slider (62) includes a slider body that is slidably mounted on a slide rail (61), a drive motor and a position sensor connected in the slider body, and two guide sliders (621) fixed at both ends of the slider body in the sliding direction. The drive motor and position sensor are respectively connected to the controller; Two guide sliders (621) are connected to the slide rail (61) respectively to limit and guide the sliding of the slider body.

10. An engine test bench, characterized in that, Includes a moving frame device for a high-power turboprop engine test stand as described in any one of claims 1-9.

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