Coaxial dual-rotor test-bed in-shaft steering five-degree-of-freedom anti-twist device

Abstract

The application provides a coaxial dual-rotor test-bed shaft-in manipulation five-degree-of-freedom anti-twist device, which comprises an upper rotor manipulation shaft, an upper rotor manipulation shaft hollow pipe, an automatic inclinometer moving ring, an automatic inclinometer stationary ring, an actuator, an actuator support, a five-degree-of-freedom anti-twist disc and a bearing support; wherein the five-degree-of-freedom anti-twist device restricts the torsional direction movement of the non-rotating components in the shaft-in manipulation system in a limited space, while the rest directions are free, and ensures that the manipulation load is not transmitted to the test-bed body through the anti-twist mechanism; the application provides the coaxial dual-rotor test-bed shaft-in manipulation five-degree-of-freedom anti-twist device, realizes the restriction of the torsional direction movement of the shaft-in manipulation system, ensures that the manipulation load is not transmitted to the test-bed body through the anti-twist mechanism, and guarantees the accuracy and effectiveness of the manipulation load measurement.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of rotor test bench control system, and particularly relates to a coaxial dual-rotor test bench shaft-in control five-degree-of-freedom anti-twist device. BACKGROUND

[0002] The rotor test bench needs to carry out full-size functional test and aerodynamic performance test of a new rotor system, and the blade angle needs to be changed and controlled during the above tests. The test bench design takes into account the influence of the hub space and the control system on the rotor force, and the upper rotor control system is arranged in a lower position, the control path is long, the inner ring of the upper rotor automatic tilt device is a moving ring, the outer ring is a fixed ring, the outer ring is connected with the actuator and the actuator support, and is fixed to the bearing support. When the rotating parts such as the inner ring in the upper rotor control system rotate, the non-rotating parts such as the actuator and the actuator support will be dragged to rotate due to the influence of friction and the like, resulting in unstable shaking of the coaxial dual-rotor shaft-in control system, affecting the normal work of the control system. If a conventional fixed anti-twist device is used, the transmission and measurement effectiveness of the control load will be affected. SUMMARY

[0003] The application aims to provide a coaxial dual-rotor test bench shaft-in control five-degree-of-freedom anti-twist device. The five-degree-of-freedom anti-twist device restricts the horizontal direction twist motion of the non-rotating parts such as the actuator and the actuator support in the coaxial dual-rotor test bench shaft-in control system, ensures the stability and reliability of the non-rotating parts of the shaft-in control system, and due to the reasonable structure arrangement of the device, the remaining five directions are free, ensuring that the control load of the upper rotor system will not be transmitted to the test bench body through the anti-twist device, but will be transmitted to the balance system, ensuring the accuracy of the control load measurement and meeting the rotor load measurement requirement.

[0004] The application provides a coaxial dual-rotor test bench shaft-in control five-degree-of-freedom anti-twist device, which comprises an upper rotor control shaft, an upper rotor control shaft hollow tube, an automatic tilt device moving ring, an automatic tilt device fixed ring, an actuator, an actuator support, a five-degree-of-freedom anti-twist disc and a bearing support.

[0005] The five-degree-of-freedom anti-twist device restricts the twist direction motion of the non-rotating parts in the shaft-in control system in a limited space, and the remaining directions are free, ensuring that the control load will not be transmitted to the test bench body through the anti-twist device.

[0006] Preferably, the five-degree-of-freedom anti-twist disc is composed of an outer floating circular frame, a middle floating circular frame, an inner floating circular frame, a metal pin shaft, an elastic cylindrical pin and a mounting support.

[0007] Preferably, the overall shape of the outer layer floating circular frame is circular ring shape, symmetrically distributed along the vertical orthogonal axis, the parallelism of the overall upper and lower surface needs to be controlled not more than 0.025, the flatness needs to be controlled not more than 0.01, to ensure the normal function of the five-degree-of-freedom anti-torsion disc in overall rotation and translation.

[0008] Preferably, the overall shape of the middle layer floating circular frame is circular ring shape, symmetrically distributed along the vertical orthogonal axis, the parallelism of the overall upper and lower surface needs to be controlled not more than 0.025, the flatness needs to be controlled not more than 0.01, to ensure the normal function of the five-degree-of-freedom anti-torsion disc in overall rotation and translation.

[0009] Preferably, the overall shape of the inner layer floating circular frame is circular ring shape, symmetrically distributed along the vertical orthogonal axis, the parallelism of the overall upper and lower surface needs to be controlled not more than 0.025, the flatness needs to be controlled not more than 0.01, to ensure the normal function of the five-degree-of-freedom anti-torsion disc in overall rotation and translation.

[0010] Preferably, the overall structure of the five-degree-of-freedom anti-torsion disc is assembled, the outer layer floating circular frame and the middle layer floating circular frame are connected through two longitudinal metal pin shafts, the middle layer floating circular frame and the two longitudinal metal pin shafts are interference assembled, the two longitudinal metal pin shafts are respectively fixed at the normal through holes of the middle layer floating circular frame through the elastic cylindrical pins at the ends, after assembly, the distance between the outer layer floating circular frame and the middle layer floating circular frame should be controlled not less than 10mm, to ensure that the structure has a certain movement space and does not produce interference and jamming in normal work.

[0011] Preferably, the middle layer floating circular frame and the inner layer floating circular frame are connected through two transverse metal pin shafts, the inner layer floating circular frame and the two transverse metal pin shafts are interference assembled, the two transverse metal pin shafts are respectively fixed at the normal through holes of the inner layer floating circular frame through the elastic cylindrical pins at the ends, after assembly, the distance between the middle layer floating circular frame and the inner layer floating circular frame should be controlled not less than 10mm, to ensure that the structure has a certain movement space and does not produce interference and jamming in normal work.

[0012] Preferably, the outer layer floating circular frame is connected with the mounting support through bolts and is fixed to the test bed body.

[0013] After the five-degree-of-freedom anti-torsion disc is assembled, the entire anti-torsion disc moves and rotates flexibly in the direction of each degree of freedom except the torsion direction, without jamming phenomenon.

[0014] The application has the following technical effects:

[0015] The application provides a coaxial dual-rotor test bed shaft inner control five-degree-of-freedom anti-torsion mechanism, which realizes the constraint of the torsion direction movement of the shaft inner control system, ensures that the control load is not transmitted to the test bed body through the anti-torsion mechanism, and guarantees the accuracy and effectiveness of the control load measurement. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the schematic diagram of the five-freedom anti-torsion mechanism in the shaft;

[0017] Figure 2 is the schematic diagram of the five-freedom anti-torsion disk;

[0018] Figure 3 is the schematic diagram of the outer floating circular frame;

[0019] Figure 4 is the schematic diagram of the middle floating circular frame;

[0020] Figure 5 is the schematic diagram of the inner floating circular frame;

[0021] Figure 6 is the schematic diagram of the mounting support;

[0022] Figure 7 is the schematic diagram of the hollow pipe of the upper rotor control shaft;

[0023] Figure 8 is the schematic diagram of the upper rotor control shaft. DETAILED DESCRIPTION

[0024] Please refer to Figures 1-8 , a kind of coaxial dual-rotor test bench in the shaft five-freedom anti-torsion device, including upper rotor control shaft 1, upper rotor control shaft hollow pipe 2, automatic inclinometer dynamic ring 3, automatic inclinometer static ring 4, actuator 5, actuator support 6, five-freedom anti-torsion disk 7, bearing support 8, as shown in Figure 1 .

[0025] Wherein, five-freedom anti-torsion disk 7 is by outer floating circular frame 7.1, middle floating circular frame 7.2, inner floating circular frame 7.3, metal pin shaft 7.4, elastic cylindrical pin 7.5, mounting support 7.6, as shown in Figure 2 .

[0026] Wherein, outer floating circular frame 7.1 as shown in Figure 3As shown, the overall shape is circular, symmetrically distributed along the vertical orthogonal axis. The parallelism of the upper and lower surfaces must be controlled to no more than 0.025, and the flatness must be controlled to no more than 0.01 to ensure the normal rotation and translation functions of the five-degree-of-freedom anti-torsion disc 7. Square support arms are arranged laterally on the left and right ends in the horizontal plane, with M12 through holes evenly distributed on each arm for installation and fixation to the rotor test bench, preventing the five-degree-of-freedom anti-torsion disc 7 from twisting in the horizontal direction, ultimately transferring the torque load to the ground to achieve the anti-torsion function. Circular through holes are evenly distributed vertically along the axis at the upper and lower ends. These through holes require special treatment, equipped with appropriately sized retaining ring grooves and bosses to achieve proper assembly with the metal pin 7.4. The thickness of the inner and outer rings is not less than one-tenth of the inner ring diameter to meet the overall stability requirements. The outer floating circular frame 7.1 is made entirely of metal and requires heat treatment and artificial aging treatment.

[0027] Among them, the middle layer floating circular frame 7.2 is as follows Figure 4 As shown, the overall shape is circular, symmetrically distributed along a vertical orthogonal axis. The parallelism of the upper and lower surfaces must be controlled to no more than 0.025, and the flatness to no more than 0.01, to ensure the normal rotation and translation functions of the five-degree-of-freedom anti-torsion disc 7. Four bosses are evenly distributed along the axis of symmetry, with a thickness not less than 1.5 times the thickness of the inner and outer rings. Through holes are arranged within these bosses, which are connected to the outer floating circular frame 7.1 via two metal pins 7.4. This allows the outer floating circular frame 7.1 to freely translate vertically along the vertical axis in the horizontal plane and freely rotate around the vertical axis, thus releasing two degrees of freedom: one vertical translation and one rotation in the horizontal plane. The transverse through holes are connected to the inner floating circular frame 7.3 via two metal pins 7.4, allowing the inner floating circular frame 7.3 to freely translate horizontally along the transverse axis in the horizontal plane and freely rotate around the transverse axis, thus releasing two degrees of freedom: one horizontal translation and one rotation in the horizontal plane. Four metal pins 7.4 allow the five-degree-of-freedom anti-torsion disc 7 to achieve free translation and rotation in four directions within the horizontal plane. Two through holes are evenly distributed in the normal direction at the vertical through-holes to fix the two metal pins 7.4 on the vertical axis. The thickness of the inner and outer rings is not less than one-tenth of the inner ring diameter to meet overall stability requirements. The middle floating circular frame 7.2 is made of the same metal material as the outer floating circular frame 7.1 and requires heat treatment and artificial aging.

[0028] Among them, the inner floating circular frame 7.3 is as follows Figure 5As shown, the overall shape is circular, along the vertical orthogonal axis symmetry distribution, the overall parallelism of the upper and lower surface control not more than 0.025, flatness control not more than 0.01, to ensure the five degree of freedom anti twist plate 7 overall rotation and translation function normal. Vertical axis inner ring on the two evenly distributed boss, with the guide groove of bearing support 8 cooperation, can constrain the inner layer floating round frame 7.3 in the horizontal plane twist movement, at the same time can along the guide groove do vertical plane up and down movement, release the freedom of this direction. Transverse axis outer ring on the two evenly distributed boss, inner arrangement through hole, through two metal pin shaft 7.4 and the middle layer floating round frame 7.2 is connected. Transverse through hole, in the normal direction evenly distributed two through hole for fixing the transverse axis of two metal pin shaft 7.4, inner and outer ring thickness is not less than the diameter of the inner circle size of one tenth, to meet the overall stability requirements. Middle layer floating round frame 7.2 overall use with outer layer floating round frame 7.1 same metal material production, need to be quenched and tempered treatment and artificial aging treatment.

[0029] Wherein, five degree of freedom anti twist plate 7 overall structure assembly, outer layer floating round frame 7.1 and middle layer floating round frame 7.2 through longitudinal two metal pin shaft 7.4 connection, middle layer floating round frame 7.2 and longitudinal two metal pin shaft 7.4 for interference assembly, longitudinal two metal pin shaft 7.4 respectively in the normal through hole of middle layer floating round frame 7.2, through the end of the elastic cylindrical pin 7.5 fixed, after assembly outer layer floating round frame 7.1 and middle layer floating round frame 7.2 between the distance should control not less than 10 mm, ensure that the structure has a certain space, normal work without interference and jamming phenomenon.

[0030] Wherein, middle layer floating round frame 7.2 and inner layer floating round frame 7.3 through transverse two metal pin shaft 7.4 connection, inner layer floating round frame 7.3 and transverse two metal pin shaft 7.4 for interference assembly, transverse two metal pin shaft 7.4 respectively in the normal through hole of inner layer floating round frame 7.3, through the end of the elastic cylindrical pin 7.5 fixed, after assembly middle layer floating round frame 7.2 and inner layer floating round frame 7.3 between the distance should control not less than 10 mm, ensure that the structure has a certain space, normal work without interference and jamming phenomenon. Outer layer floating round frame 7.1 through bolt and installation support 7.6 connection, fixed on the test bench body. Five degree of freedom anti twist plate combination installation, the whole anti twist plate except twist direction, the rest of the degree of freedom direction movement and rotation flexible, no jamming phenomenon.

[0031] Working principle

[0032] During the test process of the coaxial dual-rotor test bed, the actuator 5 drives the whole transmission chain to conduct in-shaft control and drives the upper rotor blades to conduct variable moment control movement through the automatic tilting device non-rotating ring 4, the automatic tilting device rotating ring 3 and the upper rotor control shaft 1. The actuator 5 generates a control load which is transmitted to the bearing support 8 through the non-rotating part actuator support 6, and then transmitted to the upper rotor control shaft hollow pipe 2 and finally to the balance force measuring system, so as to measure all loads except the torque. During the test process, when the upper rotor control shaft 1 and the upper rotor control shaft hollow pipe 2 rotate, the non-rotating part actuator support 6 will move due to external forces such as friction. Therefore, the movement of the non-rotating part of the whole control system must be constrained and fixed, and the control load cannot be transmitted to the test bed body by fixing constraint and other methods, otherwise the measurement of the balance force measuring system will be leaked. Through the five-degree-of-freedom anti-torsion disc 7, the horizontal torsional movement of the bearing support 8 can be constrained, while the horizontal translational movement, rolling and pitching movement and other direction movements are free, the control load will not be transmitted to the test bed body, the measurement leakage of the control load is avoided, and the accuracy and effectiveness of the control load measurement are ensured.

[0033] Through the five-degree-of-freedom anti-torsion device, the torsional movement of the non-rotating part in the in-shaft control system is constrained in the limited space, while the rest of the directions are free, so that the control load will not be transmitted to the test bed body through the anti-torsion mechanism, and the accuracy and effectiveness of the control load measurement are ensured.

[0034] The application designs a five-degree-of-freedom anti-torsion mechanism for in-shaft control of a coaxial dual-rotor test bed, which realizes the constraint of the torsional movement of the in-shaft control system, ensures that the control load will not be transmitted to the test bed body through the anti-torsion mechanism, and ensures the accuracy and effectiveness of the control load measurement.

Claims

1. A coaxial dual-rotor test-bed in-shaft manipulation five-degree-of-freedom anti-twist device, characterized in that, The device comprises an upper rotor control shaft, an upper rotor control shaft hollow tube, an automatic tilting ring, an automatic tilting ring stationary ring, an actuator, an actuator support, a five-degree-of-freedom anti-twist disc, and a bearing support. The five-degree-of-freedom anti-twist device restricts the torsional motion of the non-rotating components in the shaft control system in a limited space, while the remaining directions are free, ensuring that the control load is not transmitted to the test bed body through the anti-twist mechanism. The five-degree-of-freedom anti-twist disc is composed of an outer floating circular frame, a middle floating circular frame, an inner floating circular frame, metal pins, elastic cylindrical pins, and mounting supports. The outer floating circular frame and the middle floating circular frame are connected by two longitudinal metal pins, and the middle floating circular frame and the two longitudinal metal pins are interference-fitted. The two longitudinal metal pins are fixed by elastic cylindrical pins at the normal through holes of the middle floating circular frame. After assembly, the distance between the outer floating circular frame and the middle floating circular frame should be controlled to be not less than 10 mm to ensure that the structure has a certain movement space and does not interfere or jam during normal operation. The middle floating circular frame and the inner floating circular frame are connected by two transverse metal pins, and the inner floating circular frame and the two transverse metal pins are interference-fitted. The two transverse metal pins are fixed by elastic cylindrical pins at the normal through holes of the inner floating circular frame. After assembly, the distance between the middle floating circular frame and the inner floating circular frame should be controlled to be not less than 10 mm to ensure that the structure has a certain movement space and does not interfere or jam during normal operation.

2. The apparatus of claim 1, wherein, The overall shape of the outer floating circular frame is circular, symmetrically distributed along the vertical orthogonal axis, and the parallelism of the upper and lower surfaces should be controlled to be not more than 0.025, and the flatness should be controlled to be not more than 0.01 to ensure the normal rotation and translation functions of the five-degree-of-freedom anti-twist disc.

3. The apparatus of claim 2, wherein, The overall shape of the middle floating circular frame is circular, symmetrically distributed along the vertical orthogonal axis, and the parallelism of the upper and lower surfaces should be controlled to be not more than 0.025, and the flatness should be controlled to be not more than 0.01 to ensure the normal rotation and translation functions of the five-degree-of-freedom anti-twist disc.

4. The apparatus of claim 3, wherein, The overall shape of the inner floating circular frame is circular, symmetrically distributed along the vertical orthogonal axis, and the parallelism of the upper and lower surfaces should be controlled to be not more than 0.025, and the flatness should be controlled to be not more than 0.01 to ensure the normal rotation and translation functions of the five-degree-of-freedom anti-twist disc.

5. The apparatus of claim 4, wherein, The outer floating circular frame is connected to the mounting support by bolts and fixed to the test bed body. After the five-degree-of-freedom anti-twist disc is assembled, the entire anti-twist disc moves and rotates freely in all directions except the torsional direction without jamming.

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