A thrust and torque test platform for a coaxial twin-propeller drive device

Abstract

The present invention relates to the technical field of power testing devices, and in particular to a thrust and torque testing platform for a coaxial twin-propeller drive device, wherein a linear guide is fixedly mounted on a base, a main frame is slidably mounted on the linear guide, and a tension and compression sensor is installed thereon, a column is fixedly mounted on the main frame, a servo motor is fixedly mounted on the top of the column, torque sensor brackets are respectively fixedly mounted on both ends of the horizontal telescopic slide rail, a torque sensor is installed on the torque sensor bracket, a blade drive motor mounting bracket is connected to the corresponding torque sensor, and the tension and compression sensor, torque sensor, servo motor, and blade drive motor are respectively connected to a controller. The test platform provided by the present invention can truly and accurately measure the thrust and torque of the coaxial twin-propeller drive device synchronously, and determine the value of the optimal spacing between the drive motors of the coaxial twin-propeller drive device, and has a relatively wide range of applications and high testing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of power testing devices, and in particular to a thrust and torque testing platform for a coaxial twin-propeller drive device. Background Art

[0002] Electricity is a relatively clean, efficient, and scalable energy source. Like electric vehicles, fully electric manned and unmanned aircraft are becoming a trend. The powertrain of an electric aircraft consists of four components: a drive motor, an electronic speed controller, a battery, and a propeller. The drive motor and propeller form the aircraft's propulsion system, with the most commonly used being a coaxial twin-propeller system. The proper matching of the drive motor and propeller is crucial to the aircraft's power.

[0003] However, the quality of electric aircraft propellers and drive motor power systems varies widely in the market, and only those that pass testing on a test bench can be put into service. The thrust and torque of electric aircraft propellers are two critical parameters, requiring stable and accurate measurements before an electric aircraft can be put into service. This allows for the identification of an appropriate matching solution between the drive motor and propeller.

[0004] The existing test platforms still have the following shortcomings:

[0005] 1. Existing test platforms typically use a single motor and propeller combination for measurement. This method cannot restore the true working state of the motor and propeller. Currently, an increasing number of power systems are using coaxial twin-propeller drive solutions, so it is impossible to truly and accurately measure the thrust and torque of the coaxial twin-propeller drive device.

[0006] 2. The existing test platform cannot accurately measure the optimal spacing between the drive motors of the coaxial twin-propeller drive device in real time.

[0007] 3. The existing test platform cannot adapt to the testing requirements of blades of different lengths and drive motors of different models. Multiple test devices are required to complete the test, which is costly and inefficient.

[0008] 4. The existing testing equipment has a single function, and the thrust and torque tests of the UAV need to be carried out one by one. It does not have the conditions for comprehensive testing, which reduces the testing efficiency. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a thrust and torque testing platform for a coaxial twin-propeller drive device, which can truly and accurately measure the thrust and torque of the coaxial twin-propeller drive device synchronously, and determine the value of the optimal spacing between the drive motors of the coaxial twin-propeller drive device. It has a relatively wide range of applications and high testing efficiency.

[0010] The present invention is achieved through the following technical solutions:

[0011] A thrust and torque test platform for a coaxial twin-propeller drive device comprises a base, a linear guide, a main frame, a column, an outer shell, a servo motor, a horizontal telescopic slide, a blade drive motor mounting bracket and a controller, wherein the linear guide is fixedly mounted on the base, the main frame is slidably mounted on the linear guide, and a tension and compression sensor is installed between the base and the main frame, the column is fixedly mounted on the main frame, the outer shell is fixedly mounted on the top of the column, the servo motor is fixedly mounted on the outer shell to drive the horizontal telescopic slide to extend and retract, torque sensor brackets are respectively fixedly mounted at both ends of the horizontal telescopic slide, a torque sensor is mounted on the torque sensor bracket, two blade drive motor mounting brackets are respectively connected to corresponding torque sensors, the blade drive motor to be tested is fixedly mounted on the corresponding blade drive motor mounting bracket and drives the blade to rotate, and the tension and compression sensor, torque sensor, servo motor and blade drive motor are respectively connected to the controller.

[0012] Furthermore, the blade drive motor mounting bracket includes multiple models.

[0013] Optimally, the torque sensor is fixedly connected to the blade drive motor mounting bracket by bolts, and the blade drive motor of the coaxial twin-propeller drive device to be tested is fixedly connected to the blade drive motor mounting bracket by bolts.

[0014] Furthermore, the horizontal telescopic slide rail includes a horizontal outer slide rail, a horizontal inner slide rail and a horizontal telescopic slide rail gear. The horizontal outer slide rail is slidably installed in the outer shell, and a horizontal outer slide rail rack is provided at the bottom of the horizontal outer slide rail. The horizontal inner slide rail is slidably installed in the horizontal outer slide rail, and a horizontal inner slide rail rack is provided at the top of the horizontal inner slide rail. The horizontal telescopic slide rail gear is driven to rotate by a servo motor, and the horizontal telescopic slide rail gear is respectively engaged with the horizontal outer slide rail rack and the horizontal inner slide rail rack.

[0015] Optimally, a tension and compression sensor bracket is fixedly installed on the base, and the tension and compression sensor is fixedly installed on the tension and compression sensor bracket and connected to the main frame.

[0016] Optimally, the column is a retractable column.

[0017] Furthermore, the retractable column includes a vertical lower guide rail and a vertical upper slide rail. The vertical lower guide rail is fixedly mounted on the main frame and a slide groove is provided on the upper part of the vertical lower guide rail. The vertical lower guide rail is rotatably mounted with a retractable column gear at the upper position of the slide groove. The retractable column gear is driven to rotate by a stepper motor. The vertical upper slide rail is slidably mounted in the slide groove and a vertical upper slide rail rack is provided in the vertical upper slide rail, which is meshed with the retractable column gear.

[0018] Optimized, the stepper motor is a dual-output shaft stepper motor, and there are two retractable column gears.

[0019] Furthermore, the main frame and the column brackets are provided with diagonal braces.

[0020] Beneficial effects of the invention:

[0021] The thrust and torque testing platform for a coaxial twin-propeller drive device provided by the present invention has the following advantages:

[0022] 1. By setting up a servo motor, a horizontal telescopic slide rail, and a torque sensor, the test platform can truly realize the coaxial test of the coaxial twin-propeller drive device. The tested torque can truly and accurately reflect the actual torque of the coaxial twin-propeller drive device, and can also simultaneously determine the value of the optimal spacing between the drive motors of the coaxial twin-propeller drive device.

[0023] 2. Through the setting of servo motor, horizontal telescopic slide rail, linear guide rail, main frame, tension and compression sensor, the test platform can truly realize the coaxial test of the coaxial twin-propeller drive device. The tested tension or pressure can truly and accurately reflect the actual force of the coaxial twin-propeller drive device, and the test is synchronized.

[0024] 3. By replacing different types of blade drive motor mounting brackets, the testing requirements of different types of blade drive motors can be met. By setting up a retractable column, it can adapt to the testing requirements of different types of propeller blades, expanding the test range, reducing test costs, and improving test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the test structure of the coaxial twin-propeller drive device of the present invention.

[0026] Figure 2 It is a structural schematic diagram of the single-propeller drive device of the present invention.

[0027] Figure 3 It is a schematic diagram of the cross-sectional structure of the coaxial twin-propeller drive device test of the present invention.

[0028] In the figure: 1. Base; 2. Linear guide; 3. Main frame; 4. Diagonal brace; 5. Tension and compression sensor bracket; 6. Column; 7. Paddle; 8. Stepper motor; 9. Paddle drive motor; 10. Paddle drive motor mounting bracket; 11. Outer shell; 12. Servo motor; 13. Tension and compression sensor; 14. Torque sensor; 15. Torque sensor bracket; 16. Horizontal inner slide rail; 17. Horizontal telescopic slide rail gear; 18. Horizontal outer slide rail; 19. Vertical upper slide rail; 20. Vertical lower guide rail; 21. Slide groove; 22. Telescopic column gear. DETAILED DESCRIPTION

[0029] A thrust and torque test platform for a coaxial twin-propeller drive device, the structural diagram of which is shown in FIG. Figures 1 to 3 As shown, it includes a base 1, a linear guide rail 2, a main frame 3, a column 6, an outer shell 11, a servo motor 12, a horizontal telescopic slide rail, a blade drive motor mounting bracket 10 and a controller (not shown). The linear guide rail is fixedly mounted on the base, the main frame is slidably mounted on the linear guide rail, and a tension and compression sensor 13 is installed between the base and the main frame. The column is fixedly mounted on the main frame, and the outer shell is fixedly mounted on the top of the column. The servo motor is fixedly mounted on the outer shell to drive the horizontal telescopic slide rail to extend and retract. Torque sensor brackets 15 are respectively fixedly mounted at both ends of the horizontal telescopic slide rail, and a torque sensor 14 is installed on the torque sensor bracket. There are two blade drive motor mounting brackets respectively connected to corresponding torque sensors. The blade drive motor 9 to be tested is fixedly mounted on the corresponding blade drive motor mounting bracket and drives the blade 7 to rotate. The tension and compression sensor, torque sensor, servo motor, and blade drive motor are respectively connected to the controller.

[0030] Since the outer shell is fixedly mounted on the top of the column, the servo motor is fixedly mounted on the outer shell to drive the telescopic movement of the horizontal telescopic slide rail, torque sensor brackets are fixedly mounted on both ends of the horizontal telescopic slide rail, torque sensors are mounted on the torque sensor brackets, and blade drive motor mounting brackets are respectively connected to corresponding torque sensors. The blade drive motor of the coaxial twin-propeller drive device to be tested is fixedly mounted on the corresponding blade drive motor mounting bracket and drives the blades to rotate, so that the test platform truly simulates the working state of the coaxial twin-propeller drive device and truly realizes the coaxial test of the coaxial twin-propeller drive device. The torque of the coaxial twin-propeller drive device can be obtained by simply superimposing the values ​​measured by the two torque sensors. The tested torque can truly and accurately reflect the true torque of the coaxial twin-propeller drive device.

[0031] Since the linear guide is fixedly mounted on the base, the main frame is slidably mounted on the linear guide, and a tension and compression sensor is installed between the base and the main frame, the column is fixedly mounted on the main frame, and the outer shell is fixedly mounted on the top of the column. When the blade drive motor drives the blade to rotate, the tension or pressure generated by the two blades will act together on the main frame to form a resultant force. The main frame moves along the linear guide under the action of the resultant force, thereby applying tension or pressure to the tension and compression sensor. The tension and compression sensor directly measures the resultant force of the coaxial twin-propeller drive device in this working state. The tested tension or pressure can truly and accurately reflect the actual force of the coaxial twin-propeller drive device, and has the synchronization of the test, so as to provide accurate data support for the matching of the blade drive motor and the blades in the coaxial twin-propeller drive device during the research and development process, and can also provide a guarantee for testing whether the blade drive motor and the blades of the coaxial twin-propeller drive device are qualified during the production inspection.

[0032] Furthermore, by driving the horizontal telescopic slide with a servo motor, the optimal spacing between the propeller drive motors of the coaxial twin-propeller drive can be determined simultaneously. During testing, the controller controls the propeller drive motors to rotate the blades at rated power while simultaneously controlling the servo motor to extend and retract the horizontal telescopic slide. The tension and compression sensors and torque sensors monitor the corresponding tension, compression, and torque in real time and transmit this information to the controller. When the tension and compression sensor reaches its maximum value, the distance between the two propeller drive motors represents the optimal spacing between the propeller drive motors.

[0033] Furthermore, the blade drive motor mounting bracket includes multiple models. By replacing the blade drive motor mounting bracket of different models, the testing requirements of different models of blade drive motors can be met.

[0034] Optimized, the torque sensor and the blade drive motor mounting bracket are fixedly connected by bolts, which facilitates replacement of blade drive motor mounting brackets of different models, and the blade drive motor and the blade drive motor mounting bracket are fixedly connected by bolts, which facilitates testing of blade drive motors of different models.

[0035] Specifically, the horizontal telescopic slide rail structure is as follows: it includes a horizontal outer slide rail 18, a horizontal inner slide rail 16 and a horizontal telescopic slide rail gear 17. The horizontal outer slide rail is slidably installed in the outer shell, and a horizontal outer slide rail rack is provided at the bottom of the horizontal outer slide rail. The horizontal inner slide rail is slidably installed in the horizontal outer slide rail, and a horizontal inner slide rail rack is provided at the top of the horizontal inner slide rail. The horizontal telescopic slide rail gear is driven to rotate by a servo motor, and the horizontal telescopic slide rail gear is respectively engaged with the horizontal outer slide rail rack and the horizontal inner slide rail rack.

[0036] The servo motor drives the gear to rotate, which drives the horizontal outer slide and the horizontal inner slide to extend and retract at the same time, thereby realizing the adjustment of the optimal spacing of the blade drive motors of the two coaxial double-propeller drive devices, and the adjustment speed is relatively fast.

[0037] Optimally, a tension and compression sensor bracket 5 is fixedly installed on the base, and the tension and compression sensor is fixedly installed on the tension and compression sensor bracket and connected to the main frame, which facilitates the fixation of the tension and compression sensor.

[0038] The optimized column is a retractable column. Through the telescopic adjustment of the column, it can adapt to the testing requirements of different types of blades.

[0039] Specifically, the retractable column can adopt the following structure: it includes a vertical lower guide rail 20 and a vertical upper slide rail 19. The vertical lower guide rail is fixedly mounted on the main frame and has a slide groove 21 on its upper portion. The vertical lower guide rail is rotatably mounted with a retractable column gear 22 at the upper position of the slide groove. The retractable column gear is driven to rotate by a stepper motor 8. The vertical upper slide rail is slidably mounted within the slide groove and has a vertical upper slide rail rack that meshes with the retractable column gear. The stepper motor drives the retractable column gear to rotate, thereby driving the vertical upper slide rail to extend and retract along the slide groove, achieving the height adjustment of the column to meet the testing requirements of different blade models.

[0040] The stepper motor can preferably be a dual-output shaft stepper motor with two telescopic column gears. The two output shafts of the stepper motor drive the corresponding telescopic column gears to rotate, increasing power while enhancing the stability of the telescopic column during the telescopic process and preventing damage to the upper components.

[0041] Furthermore, a diagonal brace 4 is provided between the main frame and the column, making the structure of the column more stable.

[0042] To sum up, the thrust and torque testing platform for a coaxial twin-propeller drive device provided by the present invention can truly and accurately measure the thrust and torque of the coaxial twin-propeller drive device synchronously, and determine the value of the optimal spacing between the drive motors of the coaxial twin-propeller drive device. It has a relatively wide range of applications and high testing efficiency.

[0043] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A thrust and torque test platform for a coaxial twin-propeller drive device, characterized by: It includes a base, a linear guide rail, a main frame, a column, an outer shell, a servo motor, a horizontal telescopic slide rail, a blade drive motor mounting bracket and a controller. The linear guide rail is fixedly mounted on the base, the main frame is slidably mounted on the linear guide rail, and a tension and compression sensor is installed between the base and the main frame. The column is fixedly mounted on the main frame, the outer shell is fixedly mounted on the top of the column, the servo motor is fixedly mounted on the outer shell to drive the horizontal telescopic slide rail to extend and retract, torque sensor brackets are respectively fixedly mounted at both ends of the horizontal telescopic slide rail, a torque sensor is installed on the torque sensor bracket, and the blade drive motor mounting bracket is two and respectively connected to the corresponding torque sensors. The blade drive motor to be tested is fixedly mounted on the corresponding blade drive motor mounting bracket and drives the blade to rotate. The tension and compression sensor, torque sensor, servo motor, and blade drive motor are respectively connected to the controller. The horizontal telescopic slide rail includes a horizontal outer slide rail, a horizontal inner slide rail and a horizontal telescopic slide rail gear. The horizontal outer slide rail is slidably installed in the outer shell, and a horizontal outer slide rail rack is provided at the bottom of the horizontal outer slide rail. The horizontal inner slide rail is slidably installed in the horizontal outer slide rail, and a horizontal inner slide rail rack is provided at the top of the horizontal inner slide rail. The horizontal telescopic slide rail gear is driven to rotate by the servo motor, and the horizontal telescopic slide rail gear is respectively engaged with the horizontal outer slide rail rack and the horizontal inner slide rail rack.

2. The thrust and torque testing platform for a coaxial twin-propeller drive device according to claim 1, characterized in that: The blade drive motor mounting bracket includes various models.

3. The thrust and torque testing platform for a coaxial twin-propeller drive device according to claim 2, characterized in that: The torque sensor is fixedly connected to the blade drive motor mounting bracket via bolts, and the blade drive motor of the coaxial twin-propeller drive device to be tested is fixedly connected to the blade drive motor mounting bracket via bolts.

4. The thrust and torque testing platform for a coaxial twin-propeller drive device according to claim 1, characterized in that: A tension and compression sensor bracket is fixedly mounted on the base, and the tension and compression sensor is fixedly mounted on the tension and compression sensor bracket and connected to the main frame.

5. The thrust and torque testing platform for a coaxial twin-propeller drive device according to claim 1, characterized in that: The column is a telescopic column.

6. The thrust and torque testing platform for a coaxial twin-propeller drive device according to claim 5, characterized in that: The retractable column includes a vertical lower guide rail and a vertical upper slide rail. The vertical lower guide rail is fixedly mounted on the main frame and a slide groove is provided on the upper part of the vertical lower guide rail. The vertical lower guide rail is rotatably mounted with a retractable column gear at the upper position of the slide groove. The retractable column gear is driven to rotate by a stepper motor. The vertical upper slide rail is slidably mounted in the slide groove and a vertical upper slide rail rack is provided in the vertical upper slide rail, which is meshed with the retractable column gear.

7. The thrust and torque testing platform for a coaxial twin-propeller drive device according to claim 6, characterized in that: The stepper motor is a dual-output shaft stepper motor, and there are two retractable column gears.

8. The thrust and torque testing platform for a coaxial twin-propeller drive device according to claim 1, characterized in that: The main frame and the column bracket are provided with diagonal braces.

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