An integrated test device for ducted propulsion system and propeller propulsion system

Abstract

The present invention proposes an integrated test device for a ducted propulsion system and a propeller propulsion system, comprising a base, a base plate, a first sliding unit, a second sliding unit, a third sliding unit, a sliding measurement module and a collection module. The present invention places the propeller duct horizontally by setting a transverse slide, so that the airflow generated by the propeller duct is parallel to the ground, which can avoid the interference of the ground effect on the test results of the propeller duct dynamic characteristics. The height of the base can be appropriately lowered to improve reliability and safety; the duct is fixed by a plurality of sliding units to achieve the dynamic characteristics test of the duct system; the dynamic characteristics test of the propeller is achieved by connecting the back of the propeller motor with the sliding module; the sliding measurement module and the propeller duct to be tested are supported by a plurality of brackets respectively, which can offset the gravity influence of the tested component, and at the same time, a rear support frame is added so that the test bench can withstand greater lateral thrust.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft testing, and in particular relates to a ducted propulsion system and a propeller propulsion system integrated testing device. Background Art

[0002] With the rapid development of high-capacity batteries, motors, and artificial intelligence technologies, electric vertical take-off and landing aircraft have good application prospects in the fields of public transportation and logistics, and have become a hot spot for major automobile companies, aviation giants, and start-ups to compete for research and development. Compared with traditional aircraft, electric vertical take-off and landing aircraft use the thrust generated by motor-driven propellers as a power source, and the test of propeller duct-related dynamic characteristics has become an indispensable link in the electric vertical take-off and landing aircraft industry chain. At this stage, there are not many special equipment for measuring the propeller duct dynamic characteristics of electric vertical take-off and landing aircraft, and they all have certain limitations.

[0003] Chinese patent CN202310154158.3 discloses a device and method for measuring the starting performance of a propeller duct. The test bench can measure the forces in the longitudinal, transverse and lateral directions of the duct through a three-component balance, which can solve the problem of interference of forces in other directions on the measurement accuracy of the duct torque and thrust during the test. However, the test bench adopts a vertical layout. During the test, the propeller duct will be affected by the ground effect generated by its own flow field, which has a negative impact on the test reliability and accuracy of the propeller thrust. If the impact of the ground effect is to be reduced, the bench needs to have a certain height, which affects safety and reliability.

[0004] Chinese patent CN202310617921.1 discloses a test bench device that can measure the motion characteristics of a propeller under multiple working conditions, but the test bench structure is simple and cannot fix the duct system, and can only test the motion characteristics of the propeller. At the same time, due to the insufficient structural strength of the test bench, it is only suitable for the motion characteristics test of small thrust propellers.

[0005] Therefore, in order to adapt to the rigid demand for testing during the design and production process of electric vertical take-off and landing aircraft, as well as the inevitable development trend of large-thrust propellers and ducts, it is necessary to propose an integrated test device for ducted propulsion system and propeller propulsion system. Through a set of test devices, the dynamic characteristic parameters of both the ducted system and the propeller system can be measured, and the device can be simple, reliable and safe. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] The present invention proposes an integrated test device for a ducted propulsion system and a propeller propulsion system to solve the technical problem of how to measure the dynamic characteristic parameters of a separate ducted system and a separate propeller system by using a set of test devices.

[0008] (II) Technical solution

[0009] In order to solve the above technical problems, the present invention proposes an integrated test device for a ducted propulsion system and a propeller propulsion system, the integrated test device comprising a base, a substrate, a first sliding unit, a second sliding unit, a third sliding unit, a sliding measurement module and an acquisition module; wherein the base is installed on the substrate as a basic supporting structure of the integrated test device, and is used to fix the first sliding unit, the second sliding unit, the third sliding unit and the sliding measurement module; the first sliding unit and the second sliding unit are respectively used to support the two sides of the duct to be tested, so as to limit the movement of the duct to be tested outside the axial direction; the third sliding unit is used to provide bottom support for the duct to be tested; the sliding measurement module is used to measure the tension of the duct to be tested or the propeller to be tested; the acquisition module is used to measure the working parameters of the motor and the controller in the ducted propulsion system to be tested or the propeller propulsion system.

[0010] Furthermore, the base is formed by welding rectangular steel pipes.

[0011] Furthermore, the base includes a ground support frame, a left support frame, a right support frame, a lower support plate and a rear support frame; wherein the ground support frame adopts a field-shaped frame structure, which is fixedly connected to the T-slot on the base plate by bolts to stably fix the integrated test device on the ground; the left support frame, the right support frame and the rear support frame are respectively installed on the left side, right side and rear side of the frame structure of the ground support frame, and are respectively used to fix the first sliding unit, the second sliding unit and the sliding measurement module; the lower support plate is installed in the middle of the frame structure of the ground support frame and is located between the left support frame and the right support frame, and is used to fix the third sliding unit.

[0012] Furthermore, the first sliding unit and the second sliding unit each include a fixed block, a slider and a slide rail; wherein the fixed block has an inverted T-shaped structure with a fixing hole of a through-hole structure provided in the middle, and when performing a duct test, the side protruding structure outside the duct to be tested is inserted into the fixing hole and fixed in a tightly fitting manner; the bottom of the fixed block is fixedly connected to the top of the slider, the slide rail is fixed on the left support frame or the right support frame, the bottom of the slider is slidably connected to the slide rail, and can slide back and forth along the slide rail, so that the duct to be tested and the propeller to be tested can slide back and forth during the test to measure the push and pull force.

[0013] Furthermore, the third sliding unit includes a fixed block, a sliding block and a sliding rail; wherein the fixed block has an inverted T-shaped structure with a fixing hole in the middle, and when performing the duct test, the protruding structure at the bottom of the duct to be tested is inserted into the fixing hole for fixation; the bottom of the fixed block is fixedly connected to the top of the sliding block, the sliding rail is fixed on the lower support plate, the bottom of the sliding block is slidably connected to the sliding rail, and can slide back and forth along the sliding rail, so that the duct to be tested and the propeller to be tested can slide back and forth during the test.

[0014] Furthermore, the fixing hole is not tightly fitted with the protruding structure at the bottom of the duct to be tested.

[0015] Furthermore, the sliding measurement module includes a motor mounting flange, a support shaft, a slider, a slide rail, a tension sensor, an axially fixed hinge ear seat and an axial sliding mounting seat; wherein the motor mounting flange is installed at the front end of the support shaft, and is used to be coaxially fixedly connected to the motor of the duct to be tested or the propeller to be tested; the rear end of the support shaft is fixedly connected to the axial sliding mounting seat, and a sliding ring is provided between the support shaft and the axial sliding mounting seat, so that the support shaft and the axial sliding mounting seat have a torque rotating along the axis, and the torque is decoupled from the tension; the bottom of the axial sliding mounting seat is fixedly connected to the top of the slider, the slide rail is fixed on the rear support frame, the bottom of the slider is slidably connected to the slide rail, and can slide back and forth along the slide rail, so that the duct to be tested and the propeller to be tested can slide back and forth during the test to measure the push-pull force; the tension sensor is arranged on the rear side of the slider, and is connected to the rear support frame through the axially fixed hinge ear seat, and when the duct to be tested or the propeller to be tested is working to generate forward thrust, the tension sensor is used to measure the axial thrust.

[0016] Furthermore, the acquisition module includes a voltage sensor, a current sensor, a torque sensor, a temperature sensor, a multi-channel analog switch, a gain amplifier group and a filter group; wherein the voltage sensor, the current sensor, the torque sensor and the temperature sensor are respectively used to perform synchronous testing on the voltage, current, torque and temperature of the motor and controller in the duct to be tested or the propeller to be tested, and the collected voltage, current, torque, power and temperature signals as well as the axial thrust signal collected by the tension sensor in the sliding measurement module are converted into electrical signals through the multi-channel analog switch, the signal amplitude is enhanced through the gain amplifier group, and the noise and non-essential frequency components are eliminated through the filter group to improve the signal quality and accuracy.

[0017] (III) Beneficial effects

[0018] The present invention proposes an integrated test device for a ducted propulsion system and a propeller propulsion system, comprising a base, a base plate, a first sliding unit, a second sliding unit, a third sliding unit, a sliding measurement module and an acquisition module. The present invention places the propeller duct horizontally by setting a transverse slideway so that the airflow generated by the propeller duct is parallel to the ground, thereby avoiding the interference of the ground effect on the test results of the propeller duct dynamic characteristics. The height of the base can be appropriately lowered to improve reliability and safety; the duct is fixed by a plurality of sliding units to achieve the dynamic characteristics test of the duct system; the dynamic characteristics test of the propeller is achieved by connecting the back of the propeller motor with the sliding module; the sliding measurement module and the tested propeller duct are supported by a plurality of brackets respectively, thereby offsetting the influence of gravity on the tested component, and at the same time, a rear support frame is added so that the test bench can withstand a greater transverse thrust; the push-pull force sensor and the various sensors in the acquisition module can synchronize the measurement data to the host computer, and the dynamic characteristics and electrical characteristics parameters of the propeller and the duct system can be displayed in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the integrated test device of the present invention;

[0020] Figure 2 It is a three-dimensional schematic diagram of the base structure in the present invention;

[0021] Figure 3 This is a schematic diagram of the base installation in the present invention;

[0022] Figure 4 It is a three-dimensional schematic diagram of the first sliding unit structure in the present invention;

[0023] Figure 5 It is a three-dimensional schematic diagram of the second sliding unit structure in the present invention;

[0024] Figure 6 It is a three-dimensional schematic diagram of the third sliding unit structure in the present invention;

[0025] Figure 7 It is a three-dimensional schematic diagram of the structure of the sliding measurement module in the present invention;

[0026] Figure 8 It is a three-dimensional schematic diagram of a half-section structure of a sliding measurement module in the present invention;

[0027] Fig. 9 It is a schematic diagram of the principle of the acquisition module in the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0029] This embodiment proposes a ducted propulsion system and propeller propulsion system integrated test device, the structure of which is as follows: Figure 1 As shown, it mainly includes a base 1, a substrate 2, a first sliding unit 3, a second sliding unit 4, a third sliding unit 5, a sliding measurement module 6 and a collection module.

[0030] like Figure 2 and 3 As shown, the base 1 is used as the basic support structure of the integrated test device, which is welded by rectangular steel pipes and mainly includes a ground support frame 101, a left support frame 102, a right support frame 103, a lower support plate 104 and a rear support frame 105. Among them, the ground support frame 101 adopts a field-shaped frame structure, and is fixedly connected to the T-slot 201 on the base plate 2 by a hexagonal bolt 202, so as to stably fix the integrated test device on the ground.

[0031] The left support frame 102, the right support frame 103 and the rear support frame 105 are respectively installed on the left side, the right side and the rear side of the frame structure of the ground support frame 101, and are respectively used to fix the first sliding unit 3, the second sliding unit 4 and the sliding measurement module 6. The lower support plate 104 is installed in the middle of the frame structure of the ground support frame 101 and is located between the left support frame 102 and the right support frame 103, and is used to fix the third sliding unit 5. The left support frame 102, the right support frame 103 and the lower support plate 104 are all used as support structures to bear the gravity of the duct 7 to be measured, and the rear support frame 105 is used to support the sliding measurement module 6, so that the support shaft 602 of the sliding measurement module 6 coincides with the axis of the duct 7 to be measured, so that the duct 7 to be measured is only subjected to the push and pull force in the axial direction.

[0032] The first sliding unit 3 and the second sliding unit 4 are respectively used to support two sides of the duct to be measured 7 to limit the movement of the duct to be measured 7 outside the axial direction.

[0033] like Figure 4 As shown, the first sliding unit 3 mainly includes a first fixed block 302, a first slider 303 and a first slide rail 304. Among them, the first fixed block 302 has an inverted T-shaped structure, and a first fixed hole 301 with a through hole structure is provided in the middle. When the duct test is performed, the side protruding structure outside the duct 7 to be tested is inserted into the first fixed hole 301 and fixed in a tightly fitting manner. The bottom of the first fixed block 302 is fixedly connected to the top of the first slider 303, and the first slide rail 304 is fixed on the left support frame 102. The bottom of the first slider 303 is slidably connected to the first slide rail 304 and can slide forward and backward along the first slide rail 304, so that the duct 7 to be tested and the propeller 8 to be tested can slide forward and backward during the test to measure the push and pull force.

[0034] like Figure 5As shown, the structure of the second sliding unit 4 is the same as that of the first sliding unit 3, and mainly includes a second fixed block 402, a second slider 403 and a second slide rail 404. Among them, the second fixed block 402 has an inverted T-shaped structure, and a second fixed hole 401 with a through hole structure is provided in the middle. When performing the duct test, the side protruding structure outside the duct 7 to be tested is inserted into the second fixed hole 401 and fixed in a tightly fitting manner. The bottom of the second fixed block 402 is fixedly connected to the top of the second slider 403, and the second slide rail 404 is fixed on the left support frame 402. The bottom of the second slider 403 is slidably connected to the second slide rail 404 and can slide forward and backward along the second slide rail 404, so that the duct 7 to be tested and the propeller 8 to be tested can slide forward and backward during the test to measure the push and pull force.

[0035] The third sliding unit 5 is used to support the bottom of the duct 7 to be tested, and bear the gravity of the duct 7 to be tested. Figure 6 As shown, it mainly includes a third fixing block 502, a third slider 503 and a third slide rail 504. Among them, the third fixing block 502 has an inverted T-shaped structure, and a third fixing hole 501 is provided in the middle. When the duct test is performed, the protruding structure at the bottom of the duct 7 to be tested is inserted into the third fixing hole 501 for fixing. Unlike the first fixing hole 301 and the second fixing hole 401, the third fixing hole 501 is not tightly fitted with the protruding structure at the bottom of the duct 7 to be tested. The third fixing hole 501 only serves as the bottom support structure of the duct 7 to be tested, bearing the gravity of the duct 7 to be tested. The duct 7 to be tested is not completely fixed to the third fixing block 502 to prevent over-positioning problems. The bottom of the third fixing block 502 is fixedly connected to the top of the third slider 503, and the third slide rail 504 is fixed on the lower support plate 104. The bottom of the third slider 503 is slidably connected to the third slide rail 504 and can slide forward and backward along the third slide rail 504, so that the duct 7 to be tested and the propeller 8 to be tested can slide forward and backward during the test.

[0036] The sliding measurement module 6 is used to measure the tension of the duct 7 or the propeller 8 to be tested. Figure 7 As shown, the sliding measurement module 6 mainly includes a motor mounting flange 601, a support shaft 602, a fourth slider 603, a fourth slide rail 604, a tension sensor 605, an axial fixed hinge ear seat 606 and an axial sliding mounting seat 607. The motor mounting flange 601 is installed at the front end of the support shaft 602, and is used to be coaxially fixedly connected with the motor of the duct 7 to be measured or the propeller 8 to be measured. The rear end of the support shaft 602 is fixedly connected to the axial sliding mounting seat 607, and a sliding ring 6071 is provided between the support shaft 602 and the axial sliding mounting seat 607, as shown in FIG. Figure 8As shown, the support shaft 602 and the axial sliding mounting seat 607 have a torque that rotates along the axis, decoupling the torque from the tension. The bottom of the axial sliding mounting seat 607 is fixedly connected to the top of the fourth slider 603, and the fourth slide rail 604 is fixed on the rear support frame 105. The bottom of the fourth slider 603 is slidably connected to the fourth slide rail 604 and can slide back and forth along the fourth slide rail 604, so that the duct 7 to be tested and the propeller 8 to be tested can slide back and forth during the test to measure the push and pull force. The tension sensor 605 is arranged on the rear side of the fourth slider 603 and is connected to the rear support frame 105 through the axial fixed hinge ear seat 606. When the duct 7 to be tested or the propeller 8 to be tested is working to generate forward thrust, the tension sensor 605 is used to measure the axial thrust.

[0037] The acquisition module is used to measure the working parameters of the motor and controller in the propulsion system to be tested, and mainly includes voltage sensor, current sensor, torque sensor, temperature sensor, multi-channel analog switch, gain amplifier group and filter group. Fig. 9 As shown, the voltage sensor, current sensor, torque sensor and temperature sensor are used to synchronously test the voltage, current, torque and temperature parameters of the motor and controller in the duct 7 or the propeller 8 to be tested. The collected voltage, current, torque, power and temperature signals and the axial thrust signal collected by the tension sensor 605 are converted into electrical signals through a multi-channel analog switch, and the signal amplitude is enhanced by a gain amplifier group to ensure that the signal can be used for subsequent processing; the filter group eliminates noise and unnecessary frequency components to improve signal quality and accuracy. The upper computer introduces a digital signal processing unit to convert analog signals into digital signals for in-depth digital signal analysis and storage. In addition, by using a communication module using the RS-232 communication protocol, communication with external devices or computers is achieved to complete data transmission and control operations.

[0038] The integrated test device proposed in the present invention can measure both the propeller thrust and the duct thrust, and can enable different objects to be tested to share the same measuring device.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A ducted propulsion system and propeller propulsion system integrated test device, characterized in that: The integrated test device includes a base, a substrate, a first sliding unit, a second sliding unit, a third sliding unit, a sliding measurement module and an acquisition module; wherein the base is installed on the substrate as a basic support structure of the integrated test device, and is used to fix the first sliding unit, the second sliding unit, the third sliding unit and the sliding measurement module; the first sliding unit and the second sliding unit are respectively used to support the two sides of the duct to be tested, so as to limit the movement of the duct to be tested outside the axial direction; the third sliding unit is used to provide bottom support for the duct to be tested; the sliding measurement module is used to measure the tension of the duct to be tested or the propeller to be tested; the acquisition module is used to measure the working parameters of the motor and the controller in the duct propulsion system to be tested or the propeller propulsion system; The first sliding unit and the second sliding unit both include a fixed block, a slider and a slide rail; wherein the fixed block has an inverted T-shaped structure with a fixing hole of a through-hole structure in the middle. When the duct test is performed, the side protruding structure outside the duct to be tested is inserted into the fixing hole and fixed in a tightly fitting manner; the bottom of the fixed block is fixedly connected to the top of the slider, the slide rail is fixed on the left support frame or the right support frame, the bottom of the slider is slidably connected to the slide rail, and can slide back and forth along the slide rail, so that the duct to be tested and the propeller to be tested can slide back and forth during the test to measure the push-pull force; the third sliding unit includes a fixed block, a slider and a slide rail; wherein the fixed block has an inverted T-shaped structure with a fixing hole in the middle. When the duct test is performed, the protruding structure at the bottom of the duct to be tested is inserted into the fixing hole for fixing; the bottom of the fixed block is fixedly connected to the top of the slider, the slide rail is fixed on the lower support plate, the bottom of the slider is slidably connected to the slide rail, and can slide back and forth along the slide rail, so that the duct to be tested and the propeller to be tested can slide back and forth during the test; The sliding measurement module includes a motor mounting flange, a support shaft, a slider, a slide rail, a tension sensor, an axially fixed hinge ear seat and an axial sliding mounting seat; wherein the motor mounting flange is installed at the front end of the support shaft, and is used for being coaxially fixedly connected with the motor of the duct to be tested or the propeller to be tested; the rear end of the support shaft is fixedly connected with the axial sliding mounting seat, and a sliding ring is provided between the support shaft and the axial sliding mounting seat, so that the support shaft and the axial sliding mounting seat have a torque rotating along the axis, and the torque is decoupled from the tension; the bottom of the axial sliding mounting seat is fixedly connected with the top of the slider, the slide rail is fixed on the rear support frame, the bottom of the slider is slidably connected with the slide rail, and can slide back and forth along the slide rail, so that the duct to be tested and the propeller to be tested can slide back and forth during the test to measure the push-pull force; the tension sensor is arranged on the rear side of the slider, and is connected to the rear support frame through the axially fixed hinge ear seat, and when the duct to be tested or the propeller to be tested is working to generate a forward thrust, the tension sensor is used to measure the axial thrust.

2. The integrated test device according to claim 1, characterized in that: The base is formed by welding rectangular steel pipes.

3. The integrated test device according to claim 1, characterized in that: The base includes a ground support frame, a left support frame, a right support frame, a lower support plate and a rear support frame; wherein the ground support frame adopts a field-shaped frame structure, which is fixedly connected to the T-slot on the base plate by bolts to stably fix the integrated test device on the ground; the left support frame, the right support frame and the rear support frame are respectively installed on the left side, the right side and the rear side of the frame structure of the ground support frame, and are respectively used to fix the first sliding unit, the second sliding unit and the sliding measurement module; the lower support plate is installed in the middle of the frame structure of the ground support frame and is located between the left support frame and the right support frame, and is used to fix the third sliding unit.

4. The integrated test device according to claim 1, characterized in that: The fixing hole is not tightly fitted to the protruding structure at the bottom of the duct to be tested.

5. The integrated test device according to claim 1, characterized in that: The acquisition module includes a voltage sensor, a current sensor, a torque sensor, a temperature sensor, a multi-channel analog switch, a gain amplifier group and a filter group; wherein the voltage sensor, the current sensor, the torque sensor and the temperature sensor are respectively used to synchronously test the voltage, current, torque and temperature of the motor and the controller in the duct to be tested or the propeller to be tested, and the collected voltage, current, torque, power and temperature signals and the axial thrust signal collected by the tension sensor in the sliding measurement module are converted into electrical signals through the multi-channel analog switch, the signal amplitude is enhanced through the gain amplifier group, and the noise and non-essential frequency components are eliminated through the filter group to improve the signal quality and accuracy.

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