A sliding-rail type rotor thrust and torque measuring device

Abstract

The present invention discloses a sliding rail type rotor thrust and torque measuring device. The lower blade clamp is fixedly installed at the top end of the transmission shaft, and the blade is fixedly installed between the upper blade clamp and the lower blade clamp. A torque sensor support is coaxially installed below the test motor, and the torque sensor is installed between the test motor and the torque sensor support. The bottom end of the torque sensor is fixedly connected to the top end of the torque sensor support. The bottom end of the torque sensor support is fixedly connected with a tension sensor, and the bottom end of the tension sensor is fixedly connected to the tension sensor support. The tension sensor support is installed on the upper surface of the support frame, and the lower surface of the support frame is installed on the base. There are also multiple sliding rail lower supports on the base, and the linear sliding rail is fixed in the sliding rail lower support. A sliding rail upper support is installed between the through hole of the tension sensor support and the linear sliding rail, and an air bearing is installed between the through hole of the sensor support and the linear sliding rail. The present invention can improve the measurement accuracy.

Description

Technical Field

[0001] The present invention relates to a device for measuring tensile force and torque, and more particularly to a slide - type rotor tensile force and torque measuring device, belonging to the field of aerospace Background Art

[0002] As the planet most similar to the Earth, Mars has recently attracted much attention. To explore the origin of life and the development history of planets, Mars sample return has become the main task of various countries' Mars exploration. Mars aircraft exploration has higher detection efficiency and a wider detection range. Using a Mars aircraft to perform the Mars sample return task can collect scientifically valuable samples from farther away.

[0003] Due to the cold and extremely thin atmosphere on the surface of Mars, the rotor of a Mars aircraft needs to operate at a high rotational speed to provide sufficient flight power for the aircraft. This requires a lot of electrical energy to be supplied to the rotor, which increases the weight of the aircraft rotor motor and energy storage battery. Therefore, in order to increase the flight time of the aircraft and reduce the mass of the aircraft, it is necessary to optimize the design of the rotor performance of the aircraft. The existing tensile force and torque devices have relatively low overall rigidity, and the vibration generated during the rotation of the rotor has a great impact on the measurement results, and the accuracy of the measured tensile force and torque generated by the rotor at high rotational speeds is relatively low. Summary of the Invention

[0004] The present invention aims to solve the problems of being able to measure the tensile force and torque generated by the rotor at high rotational speeds, increasing the overall rigidity of the test device, and avoiding the influence of vibration generated during the rotation of the rotor on the measurement results, and further proposes a slide - type rotor tensile force and torque measuring device.

[0005] The technical solution adopted by the present invention to solve the above problems is as follows:

[0006] A sliding-rail type rotor thrust and torque measuring device, comprising an upper blade clamp, a lower blade clamp, a transmission shaft, a coupling, a test motor, a torque sensor, a torque sensor support, an air-bearing, a linear slide rail, a thrust sensor, an upper support of the slide rail, a thrust sensor support, a support frame, a lower support of the slide rail and a base. The lower blade clamp is fixedly installed at the top end of the transmission shaft, and the blade is fixedly installed between the upper blade clamp and the lower blade clamp. The transmission shaft is coaxially and fixedly connected with the drive shaft of the test motor through the coupling. A torque sensor support is coaxially installed below the test motor. The torque sensor is installed between the test motor and the torque sensor support. The bottom end of the torque sensor is fixedly connected with the top end of the torque sensor support. The bottom end of the torque sensor support is fixedly connected with a thrust sensor. The bottom end of the thrust sensor is fixedly connected with the thrust sensor support. The thrust sensor support is installed on the upper surface of the support frame. The lower surface of the support frame is installed on the base. A plurality of lower supports of the slide rail are further provided on the base. The plurality of lower supports of the slide rail are evenly distributed on the base along the same circumference with the center of the base as the center of the circle. The linear slide rail is fixed in the lower support of the slide rail. The sensor support and the thrust sensor support are respectively provided with through holes for the linear slide rail to pass through. The linear slide rail respectively passes through the through holes. An upper support of the slide rail is installed between the through hole of the thrust sensor support and the linear slide rail. An air-bearing is installed between the through hole of the sensor support and the linear slide rail.

[0007] Further, a heat insulation connecting plate is provided between the test motor and the torque sensor.

[0008] Further, the heat insulation connecting plate is a vacuum heat insulation plate.

[0009] Further, a speed sensor support is fixedly connected to the base, and a speed sensor is installed on the speed sensor support.

[0010] Further, the number of the thrust sensors is several, and the several thrust sensors are evenly distributed on the thrust sensor support along the same circumference with the center of the thrust sensor support as the center of the circle.

[0011] Further, the base is a connecting flange.

[0012] The beneficial effects of the present invention are:

[0013] Through the settings of a torque sensor, a tension sensor, and a rotational speed sensor, the present invention can measure the tension, torque, and rotational speed generated by the rotor at high rotational speeds. Through the settings of a tension sensor support, a support frame, a slide rail, an upper support on the slide rail, a lower support on the slide rail, and a base, the overall structural stiffness of the entire device is ensured, avoiding the risk of damage to the overall structure caused by resonance when the rotor rotates at high speed. Through the setting of a heat insulation connection plate, the torque sensor will not be affected by the increase in the temperature of the motor. Through the setting of an air bearing, the torque sensor support can only move vertically along the linear slide rail, enabling the tension sensor to only measure the force in the vertical direction, thereby avoiding the interference caused by the vibration generated during the rotation of the rotor to the tension sensor and improving the measurement accuracy. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of an embodiment of the present invention.

[0015] Figure 2 is Figure 1 a cross-sectional view of the embodiment.

[0016] In the figure: 1. Upper paddle clamp; 2. Lower paddle clamp; 3. Paddle blade; 4. Test motor; 5. Torque sensor; 6. Torque sensor support; 7. Air bearing; 8. Linear slide rail; 9. Tension sensor; 10. Upper support on the slide rail; 11. Tension sensor support; 12. Support frame; 13. Lower support on the slide rail; 14. Rotational speed sensor; 15. Rotational speed sensor support; 16. Base; 17. Heat insulation connection plate. Detailed Embodiments

[0017] Detailed Embodiment 1: In combination with Figure 1 and Figure 2 describe this embodiment. As shown in Figure 1 and Figure 2As shown in the figure, a sliding rail type rotor thrust and torque measuring device according to this embodiment includes an upper blade clamp 1, a lower blade clamp 2, a transmission shaft, a coupling, a test motor 4, a torque sensor 5, a torque sensor support 6, an air bearing 7, a linear slide rail 8, a thrust sensor 9, an upper support 10 of the slide rail, a thrust sensor support 11, a support frame 12, a lower support 13 of the slide rail, and a base 16. The lower blade clamp 2 is fixedly installed at the top of the transmission shaft, and the blade 3 is fixedly installed between the upper blade clamp 1 and the lower blade clamp 2. There are mounting holes left on the blade 3 and it is connected to the upper blade clamp 1 and the lower blade clamp 2 respectively through precision reamed bolts, which is convenient for replacing different blades 3. Preferably, the number of blades 3 is several, and several blades 3 are evenly distributed along the circumference of the transmission shaft. It is best that the number of blades 3 is two, which is convenient for meeting the requirements of characteristic tests. The transmission shaft is coaxially and fixedly connected to the drive shaft of the test motor 4 through a coupling. A torque sensor support 6 is coaxially installed below the test motor 4, and the torque sensor 5 is installed between the test motor 4 and the torque sensor support 6, which is convenient for synchronously measuring the rotor torque. Preferably, a heat insulation connecting plate 17 is provided between the test motor 4 and the torque sensor 5, and the motor, the heat insulation connecting plate 17, and the torque sensor 5 are coaxially arranged. The heat insulation connecting plate 17 can be a vacuum heat insulation plate, so that the torque sensor 5 will not be affected by the increase in the temperature of the motor, and thus accurately measure the torque generated by the rotor. The bottom end of the torque sensor 5 is fixedly connected to the top end of the torque sensor support 6, and the bottom end of the torque sensor support 6 is fixedly connected to a thrust sensor 9, which is convenient for synchronously measuring the rotor thrust. Preferably, the number of thrust sensors 9 is several, and several thrust sensors 9 are evenly distributed on the thrust sensor support 11 along the same circumference with the center of the thrust sensor support 11 as the center of the circle. It is best that the number of thrust sensors 9 is four, which is convenient for meeting the requirements of characteristic tests and making the measured value more accurate. The bottom end of the thrust sensor 9 is fixedly connected to the thrust sensor support 11, and the thrust sensor support 11 is installed on the upper surface of the support frame 12, and the lower surface of the support frame 12 is installed on the base 16. Preferably, the base 16 is a connecting flange, and there are also multiple lower supports 13 of the slide rail on the base 16. The lower supports 13 of the slide rail are detachably and fixedly connected to the base 16, which ensures the overall structural stiffness of the entire device and avoids the danger of damage to the overall structure caused by resonance under the condition of high-speed rotation of the rotor. Multiple lower supports 13 of the slide rail are evenly distributed on the base 16 along the same circumference with the center of the base 16 as the center of the circle. The linear slide rail 8 is detachably and fixedly installed in the lower supports 13 of the slide rail. The sensor support and the thrust sensor support 11 are respectively provided with through holes for the linear slide rail 8 to pass through. The linear slide rail 8 respectively passes through the through holes. An upper support 10 of the slide rail is installed between the through hole of the thrust sensor support 11 and the linear slide rail 8, and an air bearing 7 is installed between the through hole of the sensor support and the linear slide rail 8.The rotor generates an upward pulling force, which is transmitted to the torque sensor support 6 through the motor and the torque sensor 5. The torque sensor support 6 is connected to the air bearing 7. Therefore, the torque sensor support 6 can only move vertically along the linear slide rail 8. The torque sensor support 6 is connected to the tension sensor 9. Thus, the tension sensor 9 can only measure the force in the vertical direction, and further avoids the interference caused by the vibration generated during the rotation of the rotor to the tension sensor 9. The rotational speed sensor support 15 is detachably and fixedly connected to the base 16, and the rotational speed sensor 14 is installed on the rotational speed sensor support 15, which facilitates the synchronous measurement of the rotational speed of the rotor.

[0018] Working principle:

[0019] The blade is connected to the motor through the upper and lower blade clamps. There are mounting holes on the blade, and it is connected to the blade clamp through the clearance fit bolts. The test motor drives the blade to rotate, and the blade will generate a pulling force and a torque during the rotation. The motor is connected to the torque sensor through the heat insulation connecting plate, so that the torque sensor will not be affected by the increase in the temperature of the motor. The rotor generates an upward pulling force, which is transmitted to the torque sensor support through the test motor and the torque sensor. The torque sensor support is connected to the air bearing. Therefore, the torque sensor support can only move vertically along the linear slide rail. The torque sensor support is connected to four tension sensors. Thus, the tension sensors can only measure the force in the vertical direction, and further avoids the interference caused by the vibration generated during the rotation of the rotor to the tension sensors. The tension sensor support is connected to the support frame and the upper support on the slide rail. The support frame is connected to the bottom connecting flange, and the bottom connecting flange is connected to the lower support on the slide rail. This ensures the overall structural stiffness of the entire device and avoids the danger of damage to the overall structure due to resonance when the rotor rotates at high speed. The rotational speed sensor is installed on the rotational speed sensor support, and the rotational speed sensor support is installed on the bottom connecting flange, which can measure the rotational speed of the rotor.

[0020] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, according to the technical essence of the present invention, any simple modification, equivalent replacement, and improvement made to the above embodiments within the spirit and principle of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A sliding-rail type rotor thrust and torque measuring device, characterized in that: It includes an upper paddle clamp (1), a lower paddle clamp (2), a transmission shaft, a coupling, a test motor (4), a torque sensor (5), a torque sensor support (6), an air bearing (7), a linear slide rail (8), a tension sensor (9), an upper support on the slide rail (10), a tension sensor support (11), a support frame (12), a lower support on the slide rail (13) and a base (16). The lower paddle clamp (2) is fixedly installed at the top of the transmission shaft, and the paddle blade (3) is fixedly installed between the upper paddle clamp (1) and the lower paddle clamp (2). The transmission shaft is coaxially and fixedly connected to the drive shaft of the test motor (4) through a coupling. A torque sensor support (6) is coaxially installed below the test motor (4). The torque sensor (5) is installed between the test motor (4) and the torque sensor support (6). The bottom end of the torque sensor (5) is fixedly connected to the top end of the torque sensor support (6). The bottom end of the torque sensor support (6) is fixedly connected to a tension sensor (9). The bottom end of the tension sensor (9) is fixedly connected to the tension sensor support (11). The tension sensor support (11) is installed on the upper surface of the support frame (12). The lower surface of the support frame (12) is installed on the base (16). A plurality of lower supports on the slide rail (13) are also provided on the base (16). The plurality of lower supports on the slide rail (13) are evenly distributed on the base (16) along the same circumference with the center of the base (16) as the center of the circle. The linear slide rail (8) is fixed in the lower support on the slide rail (13). The sensor support and the tension sensor support (11) are respectively provided with through holes for the linear slide rail (8) to pass through. The linear slide rail (8) respectively passes through the through holes. An upper support on the slide rail (10) is installed between the through hole of the tension sensor support (11) and the linear slide rail (8). An air bearing (7) is installed between the through hole of the sensor support and the linear slide rail (8).

2. The rail - type rotor thrust and torque measuring device according to claim 1, characterized in that: An insulating connection plate (17) is provided between the test motor (4) and the torque sensor (5).

3. The rail - type rotor thrust and torque measuring device according to claim 2, characterized in that: The insulating connection plate (17) is a vacuum insulating plate.

4. A sliding-rail type rotor thrust and torque measuring device according to claim 1, characterized in that: A rotational speed sensor support (15) is fixedly connected to the base (16), and a rotational speed sensor (14) is installed on the rotational speed sensor support (15).

5. A sliding-rail type rotor thrust and torque measuring device according to claim 1, characterized in that: The number of the tension sensors (9) is several, and the several tension sensors (9) are evenly distributed on the tension sensor support (11) along the same circumference with the center of the tension sensor support (11) as the center of the circle.

6. The rail - type rotor thrust and torque measuring device according to claim 1, characterized in that: The base (16) is a connecting flange.

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