Tilting ducted fan testing device

Abstract

The invention 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 present invention relates to the technical field of ducted fan testing, and in particular to a tiltable ducted fan testing device. Background Art

[0002] As an advanced aviation power device, ducted fans have become the choice of many aircraft power systems 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, it is crucial to conduct accurate tension tests on ducted fans. However, due to the influence of mutual coupling between propellers, engines, ducts and other components, the output thrust of ducted fans is difficult to obtain through theoretical simulation. The commonly used method is to measure it directly through experiments. However, in the prior art, the ducted fan ducts of most test devices are blocked, which has a great impact on the actual value of thrust, and it is impossible to effectively adjust the position of the ducted fan to meet the diverse detection needs.

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

[0005] The present invention aims to provide a tiltable ducted fan testing device, which is capable of adjusting the testing angle of the ducted fan at any time and continuously, ensuring the accuracy of the measurement results and having a wide range of application scenarios.

[0006] To achieve the above object, the present invention 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 the end is located above the support frame. The middle part of the transmission rod is rotatably arranged 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 comprises 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 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 supporting 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] A fan mounting seat is connected to the bottom of the ducted fan, and 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 frame, and the end of the transmission rod away from the telescopic device passes upward through the table top of the support frame and is detachably connected to the support rod.

[0018] Preferably, the support frame comprises a support frame and a support platform, the support frame comprises a bottom support and a vertical support, the bottom support is arranged in a tic-tac-toe structure, and there are a plurality of vertical supports, which are arranged on the bottom support and are used to support the support platform;

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

[0020] The supporting 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 present invention has the following beneficial effects:

[0023] 1. The ducted fan is installed above the support frame, which raises the ducted fan so that there will be no obstruction to the air inlet and outlet of the ducted fan, thus 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 enabling the entire system to be in a balanced state and ensuring the accuracy of the measurement results.

[0025] 3. The telescopic device can control the rotation of the transmission rod to facilitate the adjustment of the tilt angle of the ducted fan, 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. A compact and safe design method is adopted, which can reduce the windward area of ​​the test device while avoiding obstruction of the duct of the ducted fan. This makes the device easy to test 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 present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 The overall schematic diagram of the test device in the embodiment of the present invention is Figure 1 ;

[0029] Figure 2 The overall schematic diagram of the test device in the embodiment of the present invention is Figure 2 ;

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

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

[0032] Figure 5 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 seat; 10. Ducted fan. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] like Figure 1-2As shown, an embodiment of the present invention provides a tiltable ducted fan testing device, including a support frame 1, a telescopic device 2 and a transmission rod 3; wherein the support frame 1 is placed at a 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 frame 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 frame 1, and the middle part of the transmission rod 3 is rotatably arranged on the support frame 1 to provide rotation 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 is 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 force 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 of 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 prior art.

[0040] The ducted fan 10 is installed above the support stand 1 through the installation cooperation of the above-mentioned telescopic device 2, transmission rod 3, multi-dimensional force sensor 7 and ducted fan 10, so that the ducted fan 10 is installed above the support stand 1, and the ducted fan 10 is elevated, so that there is no obstruction to the air inlet and outlet of the ducted fan 10, and a more accurate test result is 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 use 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 continuously tilt, thereby 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, Figure 3 As shown, the transmission rod 3 includes a force transmission arm 31 and a support rod 32. One end of the force 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 frame 1. The end of the force transmission arm 31 close to the support rod 32 is rotatably arranged on the table surface of the support frame 1, and the end of the force 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, thereby adjusting the installation height of the ducted fan 10, and it 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, and 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. Both ends of the rotating shaft 5 are rotatably installed in the bearings, and the rotating shaft 5 is set as a trapezoidal shaft, and 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, 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, Figure 4 As shown, the end of the support rod 32 away from the force transmission arm 31 is connected to a 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 configured as 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, so that the tilt angle of the rotating shaft 5 can be obtained, and thus the tilt angle of the force transmission arm 31 and the fan can be obtained, which can be directly displayed on the screen, and the tilt angle of the ducted fan 10 can be accurately controlled.

[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, so that the device is easy to be tested in wind tunnels with limited cross-sectional areas, as well as on moving equipment such as tracks and vehicles, thereby improving the scene applicability.

[0047] Preferably, in order to make the volume of the entire test device more reasonable and compact, in the present 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 the present 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, Figure 5 As shown, the above-mentioned support frame 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 set to 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 surface 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 frame 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 surface of the support platform 14, and an opening 141 is set 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 substitutions made by technicians in this field on the basis of the present invention shall 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 stand, 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 the end is located above the support frame. The middle part of the transmission rod is rotatably arranged 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 comprises 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 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 arranged 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 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; A fan mounting seat is connected to the bottom of the ducted fan, and 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, characterized in that: 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, characterized in that: The support frame includes a support frame and a support platform, the support frame includes a bottom support and a vertical support, the bottom support is arranged in a tic-tac-toe structure, and there are a plurality of vertical supports, which are arranged on the bottom support and are used to support 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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