Tilting ducted fan testing device

Abstract

The utility model relates to a tiltable ducted fan testing device. The tiltable ducted fan testing device comprises a supporting rack, a telescopic device, a transmission rod and a multi-dimensional force sensor, the telescopic device is hinged to the supporting rack, the output end of the telescopic device is hinged to one end of the transmission rod, the other end of the transmission rod extends upwards, the end is located above the supporting rack, and the middle of the transmission rod is rotationally arranged on the supporting rack. The multi-dimensional force sensor is arranged at the end, away from the telescopic device, of the transmission rod, and the bottom of the ducted fan is installed on the measuring face of the multi-dimensional force sensor. The testing device can continuously adjust the testing angle of the ducted fan at any time, guarantees the accuracy of a measurement result, and is wide in application scene.

Description

Technical Field

[0001] The utility model relates to the technical field of ducted fan testing, in particular to a tiltable ducted fan testing device. Background Art

[0002] As an advanced aviation propulsion system, ducted fans have become the power system of choice for many aircraft due to their safety, high efficiency, and low pollution. Ducted fans are widely used in various fields, such as drones, electric aircraft, and flying cars. With the continuous development of technology, the performance and reliability of ducted fan electric engines are constantly improving, and they are expected to be used in more fields in the future.

[0003] To ensure reliability and safety in practical applications, accurate tensile testing of ducted fans is crucial. However, due to the coupling between components such as the propeller, engine, and duct, the output thrust of a ducted fan is difficult to obtain through theoretical simulation. Direct experimental measurement is currently the most common method. However, in existing testing devices, the ducted fan air duct is obstructed, significantly affecting the actual thrust value, and the position of the ducted fan cannot be effectively adjusted to meet diverse testing requirements.

[0004] Currently, there are many types of fixed test devices for ducted fans, but they can only test thrust in one direction at a time. The degree of restoration under simulated aircraft working conditions is not enough, and there are still few test solutions that can adjust the attitude of ducted fans. Utility Model Content

[0005] The utility model aims to provide a tiltable ducted fan testing device, which can adjust the test angle of the ducted fan at any time and continuously to ensure the accuracy of the measurement results and has a wide range of application scenarios.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A tiltable ducted fan testing device comprises a support stand, a telescopic device, a transmission rod and a multi-dimensional force sensor;

[0008] The telescopic device is hinged on the support frame, and the output end is hinged to one end of the transmission rod. The other end of the transmission rod extends upward and is located above the support frame. The middle part of the transmission rod is rotatably mounted on the support frame.

[0009] The multi-dimensional force sensor is arranged at one end of the transmission rod away from the telescopic device, and the bottom of the ducted fan is installed on the measuring surface of the multi-dimensional force sensor.

[0010] Preferably, the transmission rod includes a force transmission arm and a support rod, one end of the force transmission arm is hinged to the output end of the telescopic device, and the other end extends upward, and the end is located above the support stand and is detachably connected to the support rod;

[0011] The end portion of the force transmission arm close to the support rod is rotatably arranged on the table surface of the support stand.

[0012] Preferably, two groups of bearing seats are installed on the table top of the support frame, and a rotating shaft is provided between the two groups of bearing seats. The rotating shaft passes through the force transmission arm and is connected together to form a whole.

[0013] Preferably, the force transmission arm and the support rod are both provided with flanges at their adjacent ends, and the two are detachably connected via the flanges.

[0014] Preferably, the end of the support rod away from the force transmission arm is provided with a mounting groove, and the multi-dimensional force sensor is mounted in the mounting groove;

[0015] The bottom of the ducted fan is connected to a fan mounting seat, the bottom of the fan mounting seat extends into the mounting groove and is connected to the measuring surface of the multi-dimensional force sensor.

[0016] Preferably, the telescopic device, the force transmission arm, the support rod and the ducted fan are arranged along the length direction of the support stand.

[0017] Preferably, the telescopic device is hinged below the table top of the support stand, and the end of the transmission rod away from the telescopic device passes upward through the table top of the support stand and is detachably connected to the support rod.

[0018] Preferably, the support frame includes a support frame and a support platform, the support frame includes a bottom bracket and a vertical bracket, the bottom bracket is arranged in a well-shaped structure, and there are multiple vertical brackets, which are arranged on the bottom bracket for supporting the support platform;

[0019] A reinforcing rod is connected between the side end of each vertical support and the bottom support;

[0020] The support platform is provided with an opening for the transmission rod to pass through and move.

[0021] Preferably, the transmission rod is provided with a rotating shaft, and the transmission rod is rotatably arranged on the supporting stand via the rotating shaft, and an angle sensor is sleeved on the rotating shaft.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. The ducted fan is installed above the support frame, which elevates the ducted fan so that there is no obstruction to the air inlet and outlet of the ducted fan, thereby obtaining more accurate test results.

[0024] 2. The installation and coordination of the telescopic device, transmission rod, multi-dimensional force sensor and ducted fan ensures that when the ducted fan is tested, the force exerted by the ducted fan on the transmission rod and the force exerted by the telescopic device on the transmission rod are in opposite directions, thereby keeping the entire system in a balanced state and ensuring the accuracy of the measurement results.

[0025] 3. The telescopic device can adjust the tilt angle of the ducted fan by controlling the rotation of the transmission rod, and can realize continuous tilt of the ducted fan, simulating the thrust of the ducted fan during the up and down pitching process of the flight device, and is easy to use.

[0026] 4. The overall structure is distributed longitudinally, which is consistent with the direction of the push and pull forces generated by the ducted fan, thus improving the stability of the equipment. The compact and safe design method can reduce the windward area of ​​the test device while avoiding obstruction of the ducted fan's air duct. This makes the device convenient for testing in wind tunnels with limited cross-sectional areas, as well as on moving equipment such as tracks and vehicles, thus improving its applicability in different scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 The overall schematic diagram of the test device in the embodiment of the utility model Figure 1 ;

[0029] Figure 2 The overall schematic diagram of the test device in the embodiment of the utility model Figure 2 ;

[0030] Figure 3 This is a schematic diagram of the coordination of the telescopic device, the transmission rod, and the ducted fan in an embodiment of the present utility model;

[0031] Figure 4 This is a schematic diagram of the installation of a ducted fan in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of a support stand according to an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1. Support frame; 11. Bottom bracket; 12. Vertical bracket; 13. Reinforcement rod; 14. Support platform; 141. Opening; 2. Telescopic device; 3. Transmission rod; 31. Force transmission arm; 32. Support rod; 33. Flange; 4. Bearing seat; 5. Rotating shaft; 6. Mounting block; 7. Multi-dimensional force sensor; 8. Angle sensor; 9. Fan mounting bracket; 10. Ducted fan. DETAILED DESCRIPTION

[0035] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0038] like Figure 1-2As shown, an embodiment of the present invention provides a tiltable ducted fan test device, comprising a support stand 1, a telescopic device 2 and a transmission rod 3; wherein the support stand 1 is placed at the test site, and is used to carry the telescopic device 2, the transmission rod 3 and the ducted fan 10. Specifically, the telescopic device 2 is hinged on the support stand 1, and its output end is hinged to one end of the transmission rod 3, and the other end of the transmission rod 3 extends upward, and finally its end is located above the support stand 1, and the middle part of the transmission rod 3 is rotatably arranged on the support stand 1 to provide rotational support, so that the telescopic device 2 can drive the transmission rod 3 to rotate around the rotation axis of the transmission rod 3. Correspondingly, in order to measure the thrust of the ducted fan 10, a multi-dimensional force sensor 7 is provided at the end of the transmission rod 3 away from the telescopic device 2, and the mounting surface of the multi-dimensional force sensor 7 is mounted on the end side of the transmission rod 3, and the bottom of the ducted fan 10 is mounted on the measuring surface of the multi-dimensional force sensor 7. After the ducted fan 10 is installed, the thrust generated by the ducted fan 10 during operation can cause the transmission rod 3 to rotate around its rotation axis. Specifically, the telescopic device 2 can be an electric cylinder, and the multi-dimensional force sensor 7 can be an existing sensor.

[0039] The working principle is: the ducted fan 10 generates thrust when it works, which acts on the transmission rod 3 through the multi-dimensional force sensor 7, causing it to tend to rotate around its rotation axis. At the same time, the telescopic device 2 applies a force (pulling or thrust) to the transmission rod 3. The thrust generated by the ducted fan 10 uses part of the transmission rod 3 as a lever to form a torque, and the force exerted by the telescopic device 2 on the transmission rod 3 uses part of the transmission rod 3 as a lever to form a torque, and the two forces are in opposite directions, so the two forces form a force balance to achieve dynamic balance of the system. At the same time, the thrust of the ducted fan 10 acts on the multi-dimensional force sensor 7, and the multi-dimensional force sensor 7 transmits the electrical signal back to the computer, which displays the thrust of the ducted fan 10 through calculation. Of course, the calculation process belongs to the existing technology.

[0040] Among them, through the installation and coordination of the above-mentioned support platform 1, telescopic device 2, transmission rod 3, multi-dimensional force sensor 7 and ducted fan 10, the ducted fan 10 is installed above the support platform 1, and the ducted fan 10 is elevated, so that the air inlet and outlet of the ducted fan 10 will not be blocked, and more accurate test results are obtained; and the telescopic device 2 can control the transmission rod 3 to rotate to a certain angle, thereby driving the ducted fan 10 to rotate to a certain angle, and can simulate the actual thrust of the ducted fan 10 on the aircraft when the eccentricity is included, so that the measurement is closer to the actual working condition, and the telescopic device 2 can be controlled by a computer, and its telescopic The amount and telescopic speed can be guaranteed, the rotation angle of the transmission rod 3 can be controlled more accurately, and the transmission rod 3 can be driven by the telescopic device 2 to allow the ducted fan 10 to tilt continuously, simulating the thrust of the ducted fan 10 during the up and down pitching process of the flight device; and in the simulation process, since the force of the ducted fan 10 on the transmission rod 3 and the force of the telescopic device 2 on the transmission rod 3 are in opposite directions, the entire system can be in a balanced state, the transmission rod 3 is in a balanced state, and the working angle of the ducted fan 10 in each angle test can be guaranteed, thereby ensuring the accuracy of the measurement results.

[0041] Specifically, such as Figure 3 As shown, the above-mentioned transmission rod 3 includes a transmission arm 31 and a support rod 32. One end of the transmission arm 31 is hinged to the output end of the telescopic device 2, and the other end extends upward, and the end is located above the support stand 1. The end of the transmission arm 31 close to the support rod 32 is rotatably arranged on the table surface of the support stand 1, and the end of the transmission arm 31 is detachably connected to the support rod 32, so as to facilitate the adjustment of the length of the support rod 32, thereby adjusting the length of the transmission rod 3, and thus adjusting the installation height of the ducted fan 10, which is more convenient to use. In this embodiment, the support rod 32 can be a hollow steel pipe.

[0042] Specifically, in order to realize the rotation of the force transmission arm 31 and the entire transmission rod 3, two sets of bearing seats 4 are installed on the table top of the support frame 1. The two sets of bearing seats 4 are installed on the support frame 1 by bolts, and a rotating shaft 5 is installed between the two sets of bearing seats 4. The two ends of the rotating shaft 5 are rotatably installed in the bearings, and the rotating shaft 5 is set as a trapezoidal shaft. Under the action of the bearing end surface, the rotating shaft 5 will not move longitudinally during use, and the rotating shaft 5 passes through the force transmission arm 31 and is connected together to form a whole. In this embodiment, the rotating shaft 5 and the force transmission arm 31 are welded together. Of course, a mounting plate can also be processed on the outside of the rotating shaft 5, and the mounting plate and the force transmission arm 31 are connected together by bolts.

[0043] Specifically, in order to make the connection between the ends of the force transmission arm 31 and the support rod 32 more stable, a flange 33 is fixed at the ends close to each other of the force transmission arm 31 and the support rod 32, and the two flanges 33 are connected together by bolts, thereby connecting the force transmission arm 31 and the support rod 32 together, and the connection is firm.

[0044] Specifically, such as Figure 4 As shown, the end of the support rod 32 away from the force transmission arm 31 is connected to the mounting block 6, and a mounting groove is provided on the side of the mounting block 6. The mounting surface of the multi-dimensional force sensor 7 is mounted on the side wall of the mounting groove by bolts to play a protective role. Correspondingly, in order to facilitate the installation of the ducted fan 10, a fan mounting seat 9 is connected to the bottom of the ducted fan 10, and the bottom of the fan mounting seat 9 extends into the mounting groove and is connected to the measuring surface of the multi-dimensional force sensor 7. Preferably, in order to facilitate the connection of the fan mounting seat 9, the fan mounting seat 9 is set to a T-shaped structure, and the horizontal plate in the fan mounting seat 9 is connected to the bottom of the ducted fan 10 by bolts, and the lower part of the vertical plate enters the mounting groove and is connected to the measuring surface of the multi-dimensional force sensor 7.

[0045] Specifically, an angle sensor 8 is installed on the rotating shaft 5 through a ring. The electrical signal of the angle sensor 8 is fed back to the computer, and the tilt angle of the rotating shaft 5 can be obtained, thereby obtaining the tilt angle of the force transmission arm 31 and the fan, which can be directly displayed on the screen and can accurately control the tilt angle of the ducted fan 10.

[0046] Preferably, in this embodiment, the telescopic device 2, the force transmission arm 31, the support rod 32 and the ducted fan 10 are arranged along the length direction of the support stand 1, and the overall structure is distributed longitudinally, which is consistent with the direction of the push and pull forces generated by the ducted fan 10, thereby improving the stability of the entire test device. A compact and safe design method is adopted, which can reduce the windward area of ​​the test device while avoiding obstruction of the air duct of the ducted fan 10, making it easy to test the device in wind tunnels with limited cross-sectional areas, as well as on moving equipment such as tracks and vehicles, thereby improving the scenario applicability.

[0047] Preferably, in order to make the volume of the entire test device more reasonable and compact, in this embodiment, the mounting end of the telescopic device 2 is hinged to the bottom of the table top of the support stand 1, and the end of the force transmission arm 31 away from the telescopic device 2 passes upward through the table top of the support stand 1 and is located above the support stand 1, so that the telescopic device 2 and part of the force transmission arm 31 are hidden in the support stand 1. On the one hand, it plays a protective role. On the other hand, compared with the installation form in which the telescopic device 2 and the force transmission arm 31 are both installed above the support stand 1, this installation form in this embodiment will not block the air inlet and outlet of the ducted fan 10, because the ducted fan 10 is located above the support stand 1, and it will also reduce the height of the entire device, and the center of gravity is lowered. During operation, it is not easy to move and is more stable.

[0048] Specifically, such as Figure 5 As shown, the above-mentioned support platform 1 includes a support frame and a support platform 14, wherein the support frame includes a bottom bracket 11 and a vertical bracket 12, and the bottom bracket 11 is arranged in a tic-tac-toe structure, that is, the bottom bracket 11 includes two horizontal cross bars and two horizontal vertical bars, which cross to form a tic-tac-toe bracket. Of course, this is only one form. Correspondingly, there are multiple vertical brackets 12, and they are all fixedly connected to the upper end face of the bottom bracket 11, that is, connected to the connecting rod inside it, and the support platform 14 is installed on the installation plane formed by multiple vertical brackets 12. In order to further ensure the stability of the support platform 1, a reinforcing rod 13 is connected between the side end of each vertical bracket 12 and the bottom bracket 11, which is used as a reinforcing rib. The telescopic device 2 is hinged on the lower end face of the support platform 14, and an opening 141 is provided on the support platform 14. The force transmission arm 31 passes through the opening 141 upward and is connected to the support rod 32 above.

[0049] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A tiltable ducted fan testing device, characterized in that: It includes a supporting frame, a telescopic device, a transmission rod and a multi-dimensional force sensor; The telescopic device is hinged on the support frame, and the output end is hinged to one end of the transmission rod. The other end of the transmission rod extends upward and is located above the support frame. The middle part of the transmission rod is rotatably mounted on the support frame. The multi-dimensional force sensor is arranged at one end of the transmission rod away from the telescopic device, and the bottom of the ducted fan is installed on the measuring surface of the multi-dimensional force sensor.

2. The tiltable ducted fan testing device according to claim 1, characterized in that: The transmission rod includes a force transmission arm and a support rod, one end of the force transmission arm is hinged to the output end of the telescopic device, and the other end extends upward, and the end is located above the support stand and is detachably connected to the support rod; The end portion of the force transmission arm close to the support rod is rotatably arranged on the table surface of the support stand.

3. The tiltable ducted fan testing device according to claim 2, characterized in that: Two groups of bearing seats are installed on the table top of the support frame, and a rotating shaft is provided between the two groups of bearing seats. The rotating shaft passes through the force transmission arm and is connected together to form a whole.

4. The tiltable ducted fan testing device according to claim 2, characterized in that: The end portions of the force transmission arm and the support rod that are close to each other are both provided with flanges, and the two are detachably connected via the flanges.

5. The tiltable ducted fan testing device according to claim 2, characterized in that: The end of the support rod away from the force transmission arm is provided with a mounting groove, and the multi-dimensional force sensor is installed in the mounting groove; The bottom of the ducted fan is connected to a fan mounting seat, the bottom of the fan mounting seat extends into the mounting groove and is connected to the measuring surface of the multi-dimensional force sensor.

6. The tiltable ducted fan testing device according to claim 2, characterized in that: The telescopic device, the force transmission arm, the support rod and the ducted fan are arranged along the length direction of the support stand.

7. The tiltable ducted fan testing device according to claim 2, wherein: The telescopic device is hinged below the table top of the support stand, and the end of the transmission rod away from the telescopic device passes upward through the table top of the support stand and is detachably connected to the support rod.

8. The tiltable ducted fan testing device according to claim 1, wherein: The support frame includes a support frame and a support platform, the support frame includes a bottom bracket and a vertical bracket, the bottom bracket is arranged in a well-shaped structure, and there are multiple vertical brackets, which are arranged on the bottom bracket for supporting the support platform; A reinforcing rod is connected between the side end of each vertical bracket and each bottom bracket; The support platform is provided with an opening for the transmission rod to pass through and move.

9. The tiltable ducted fan testing device according to any one of claims 1 to 8, characterized in that: The transmission rod is provided with a rotating shaft, and the transmission rod is rotatably arranged on the supporting stand through the rotating shaft, and an angle sensor is sleeved on the rotating shaft.

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