Autogyro rotor pre-spin control device and control method thereof

Abstract

The present invention provides a rotor pre-rotation control device and a control method thereof for a gyroplane. The control device includes a pre-rotation mechanism and a control mechanism. The pre-rotation mechanism includes a belt transmission structure and a tensioning structure. The tensioning structure includes a belt tensioning rocker arm and a belt tensioning wheel and a belt pressing block fixed on the belt tensioning rocker arm. The belt tensioning rocker arm is provided with a belt relaxation spring. The control mechanism is connected to the belt tensioning rocker arm through a pre-rotation cable. When the control mechanism tightens the pre-rotation cable, the belt tensioning wheel presses the belt so that the belt is in a tensioned state between the large pulley and the small pulley. The power of the engine output shaft is transmitted to the rotor clutch gear through the belt transmission structure and the transmission mechanism. The present invention adopts a new pre-rotation and its control method to remove the pre-rotation cylinder and the air path control device on the basis of realizing the original pre-rotation control function, thereby reducing the complexity and structural weight of the pre-rotation system and improving its safety and reliability.

Description

Technical Field

[0001] The invention relates to the field of aviation technology, in particular to a rotor pre-rotation control device for an autogyroplane and a control method thereof. Background Art

[0002] An autogyro (or gyroplane for short) is a type of rotorcraft that uses its own rotor as a lift surface and propeller push / pull or other energy supply methods as forward power. It has the characteristics of simple structure, high safety, and low cost. The rotor of the gyroplane relies on the flow in front of it to drive itself to rotate to provide lift. The use of rotor pre-rotation technology, which uses the transmission device to pre-rotate the rotor before takeoff, and then cuts off the transmission link through the clutch before takeoff, allows the gyroplane to make a harrier jump or take off in an ultra-short distance.

[0003] The existing pre-rotation mechanism adopts a small pre-rotation cylinder and an air path control device, which has a complex system, a heavy structure, and low safety and reliability. Summary of the invention

[0004] In order to solve the problems of the prior art, the present invention provides a rotor pre-spin control device and a control method for an autogyro, which adopts a new pre-spin and its control method, removes the pre-spin cylinder and the air path control device on the basis of realizing the original pre-spin control function, reduces the complexity and structural weight of the pre-spin system, and improves its safety and reliability.

[0005] The present invention provides a rotor pre-rotation control device for an autogyro, comprising a pre-rotation mechanism and a control mechanism. The pre-rotation mechanism comprises a belt transmission structure and a tensioning structure, the belt transmission structure is composed of a large pulley and a small pulley through a belt, the large pulley is located on the engine output shaft, and the small pulley is connected to the rotor clutch gear through a transmission mechanism; the tensioning structure comprises a belt tensioning rocker arm and a belt tensioning wheel and a belt pressing block fixed on the belt tensioning rocker arm, a belt tensioning spring is arranged on the belt tensioning rocker arm, the belt tensioning rocker arm is separated from the belt by the pulling force of the belt relaxation spring, the belt pressing block is tightly attached to the belt wound around the small pulley, and the belt and the large pulley are in a relaxed state; the control mechanism is connected to the belt tensioning rocker arm through a pre-rotation pull wire, and when the control mechanism tightens the pre-rotation pull wire, the belt tensioning wheel presses the belt to make the belt in a tensioned state between the large pulley and the small pulley, and the power of the engine output shaft is transmitted to the rotor clutch gear through the belt transmission structure and the transmission mechanism.

[0006] As a further improvement, the operating mechanism includes a front operating lever, a pre-rotation hook and a pre-rotation hook bracket, wherein the pre-rotation hook is arranged on the pre-rotation hook bracket, and the front operating lever controls the tightening and loosening of the pre-rotation pull line through the pre-rotation hook.

[0007] According to a further improvement, the transmission mechanism is a flexible shaft.

[0008] As a further improvement, the transmission mechanism is a hard shaft transmission consisting of a transmission shaft and a universal joint coupling.

[0009] As a further improvement, the transmission mechanism is an electric transmission composed of a generator, a cable and an electric motor.

[0010] The transmission mechanism is a hydraulic transmission composed of a hydraulic pump, a hydraulic pipeline and a hydraulic motor.

[0011] The present invention also provides a method for controlling the rotor pre-rotation of a gyroplane, comprising the following steps:

[0012] 1) The belt tensioning rocker arm is acted upon by the tension of the belt relaxation spring, so that the belt tensioning wheel does not contact the belt. At the same time, the belt pressing block is tightly attached to the belt wound around the small pulley to prevent the belt and the small pulley from moving, while the belt and the large pulley are in a relaxed state;

[0013] 2) Start the engine. At this time, the power of the engine output shaft cannot be transmitted to the rotor through the large pulley and belt;

[0014] 3) The pilot pulls the front control stick back to a certain position and then hangs the pre-spin hook on the bottom of the front control stick;

[0015] 4) Push the joystick forward, the joystick drives the pre-spin hook to move forward, thereby driving the pre-spin pull line;

[0016] 5) The pre-spinning wire drives the belt tensioning rocker arm to move, so that the belt tensioning wheel contacts the belt, thereby tightening the belt. At the same time, the belt tightening block separates from the belt, so that the belt and the small pulley can move. At this time, the engine power is transmitted to the small pulley through the large pulley and the belt;

[0017] 6) The small pulley drives the rotor clutch gear to rotate through the transmission mechanism. When the rotor clutch gear rotates, it pushes the clutch gear upwards to mesh with the rotor large gear, thereby driving the rotor to rotate;

[0018] 7) After the rotor speed stabilizes, the pilot pulls back the joystick, the pre-rotation cable is relaxed, and the system returns to the state of step 1). After the rotor clutch gear loses power, it is disengaged from the rotor gear by gravity, and then the rotor rotates by inertia.

[0019] 8) Continue to pull the joystick backward, the tail of the pre-spin hook contacts the pre-spin hook bracket. As you continue to pull backward, the pre-spin hook automatically falls off the front joystick due to gravity, and the rotor pre-spin control is completed.

[0020] The beneficial effects of the present invention are: the new pre-swirl and its control method are adopted to remove the pre-swirl cylinder and the air path control device on the basis of realizing the original pre-swirl control function, thereby reducing the complexity and structural weight of the pre-swirl system and improving its safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a stereoscopic view of the rotorcraft;

[0022] Figure 2 This is the front view of the rotorcraft;

[0023] Figure 3 It is a side view of the rotorcraft;

[0024] Figure 4 This is a top view of the rotorcraft;

[0025] Figure 5 A perspective view of a rotorcraft with wings added;

[0026] Figure 6 This is a front view of the rotorcraft with wings added;

[0027] Figure 7 It is a side view of the rotorcraft with the wings added;

[0028] Figure 8 This is a top view of the rotorcraft with wings added;

[0029] Fig. 9 This is the connection diagram between the tail beam and the frame;

[0030] Fig.10 This is a three-dimensional diagram of the connection between the tail beam and the frame;

[0031] Fig.11 This is the exploded diagram of the connection between the tail beam and the frame;

[0032] Fig.12 A stereogram showing the connection between the mast and the frame;

[0033] Fig.13 This is the connection diagram between the mast and the frame;

[0034] Fig.14 Exploded diagram of the connection between mast and frame;

[0035] Fig.15 This is a three-dimensional diagram of the mast in folded state;

[0036] Fig.16 This is a diagram of the mast in folded state;

[0037] Fig.17 This is the rear view of the trim device;

[0038] Fig.18 This is a side view of the trim device;

[0039] Fig.19 A stereogram was provided for trimming;

[0040] Fig. 20It is a stereogram of pre-rotation transmission;

[0041] Fig.21 For pre-rotation GIFs;

[0042] Fig. 22 It is the pre-rotation control diagram of the front joystick;

[0043] Fig.23 This is the normal state diagram of the front joystick;

[0044] Fig.24 This is a stereoscopic view of the front joystick in normal state;

[0045] Fig.25 This is a diagram of the rotorcraft fuselage composition;

[0046] Fig.26 This is a diagram of the frame, engine, and pre-spin system;

[0047] Fig. 27 This is the rotor brake diagram;

[0048] Fig.28 This is the schematic diagram of the rotor brake.

[0049] In the figure, rotor blades 1, fuselage 2, landing gear 3, tail boom 4, tail wing 5, propulsion propeller 6, engine 7, tail boom clamp 8, frame 9, mast clamp 10, upper mast 11, belt tensioning rocker arm 12, tension spring 13, linear motor 14, belt relaxation spring 15, belt pressing block 16, small pulley 17, belt tensioning pulley 18, belt 19, large pulley 20, flexible shaft 21, pre-rotation cable 22, pre-rotation hook 23, forward push joystick 24, right fuselage 25, front windshield 26, front fuselage 27, front seat 28, left fuselage 29, rear seat 30, engine fairing 31, mast fairing 32, rotor brake pad 33, rotor brake cable 34, wing 35. DETAILED DESCRIPTION

[0050] The present invention will be further described below in conjunction with the accompanying drawings.

[0051] Embodiment 1

[0052] Autogyro rotor pre-spin control device Figure 21 to Figure 26As shown, it includes two parts: a pre-rotation mechanism and an operating mechanism. The pre-rotation mechanism includes a large pulley 20 of the engine, a belt 19, a small pulley 17, a belt tensioning pulley 18, a belt tensioning rocker arm 12, a belt relaxation spring 15, a belt pressing block 16, a flexible shaft 21, a rotor clutch gear and other components, wherein the large pulley 20 is located on the output shaft of the engine 7, and the belt tensioning pulley 18 and the belt pressing block 16 are located on the belt tensioning rocker arm 12. The operating mechanism mainly includes a front joystick 24, a pre-rotation hook 23, a pre-rotation hook bracket, a pre-rotation pull wire 22 and other components. The front end of the pre-rotation pull wire 22 is connected to the pre-rotation hook 23, and the rear end is connected to the belt tensioning rocker arm 12.

[0053] The large pulley 20 in the pre-rotation mechanism is connected to the output shaft of the engine 7, the lower end of the flexible shaft 21 is connected to the small pulley 17, and the upper end of the flexible shaft 21 is connected to the rotor clutch gear. The large pulley 20 and the small pulley 17 are driven by a belt 19.

[0054] During pre-spin, the forward push lever 24 drives the pre-spin pull wire 22, thereby pulling the belt tensioning wheel 18 to tighten the belt 19, so that the power of the engine 7 is transmitted to the rotor through the belt wheel and the flexible shaft 21. After the rotor speed stabilizes, the forward push lever 24 is pulled backward, and the pre-spin hook 23 automatically falls off the forward push lever 24. After the belt 19 is loosened and stuck, the rotor loses power and rotates by inertia.

[0055] The process of rotor pre-spin control is:

[0056] (1) The belt tensioning rocker arm 12 is acted upon by the tension of the belt release spring 15, so that the belt tensioning pulley 18 does not contact the belt 19. At the same time, the belt pressing block 16 is tightly attached to the belt 19 wound around the small pulley, preventing the belt 19 and the small pulley 17 from moving. The belt 19 and the large pulley 20 are in a relaxed state.

[0057] (2) The engine 7 is started. At this time, the power of the engine output shaft cannot be transmitted to the rotor through the large pulley 20 and the belt 19.

[0058] (3) The pilot pulls the front control stick 24 backward to a certain position and then hangs the pre-spin hook 23 on the bottom of the front control stick 24.

[0059] (4) Pushing the operating lever 24 forward drives the pre-twist hook 23 to move forward, thereby driving the pre-twist pull line 22.

[0060] (5) The pre-twisted pull wire 22 drives the belt tensioning rocker arm 12 to move, so that the belt tensioning pulley 18 contacts the belt 19, thereby pressing the belt 19. At the same time, the belt pressing block 16 separates from the belt 19, so that the belt 19 and the small pulley 17 can move. At this time, the power of the engine 7 is transmitted to the small pulley 17 through the large pulley 20 and the belt 19.

[0061] (6) The small pulley 17 drives the rotor clutch gear at the upper end of the flexible shaft to rotate through the flexible shaft 21. When the rotor clutch gear rotates, it pushes the clutch gear upward to engage with the large rotor gear, thereby driving the rotor to rotate.

[0062] (7) After the rotor speed stabilizes, the pilot pulls back and forward the joystick 24, the pre-rotation cable is relaxed 8, and the state returns to step (1). After the rotor clutch gear has no power, it is disengaged from the rotor gear by gravity, and then the rotor rotates by inertia.

[0063] (8) Continue to pull back and push forward the joystick 24, and the tail of the pre-spin hook 23 contacts the pre-spin hook bracket. When you continue to pull back, the pre-spin hook 23 automatically falls off the front joystick 24 due to gravity. The rotor pre-spin operation is completed.

[0064] Embodiment 2

[0065] The flexible shaft 21 in the first embodiment can be replaced by other transmission modes, including but not limited to hard shaft transmission consisting of a transmission shaft and a universal joint coupling, electric transmission consisting of a generator, a cable, and an electric motor, and hydraulic transmission consisting of a hydraulic pump, a hydraulic pipeline, and a hydraulic motor.

[0066] Figure 1-20 and Fig. 27 , 28 The present invention is a schematic diagram of a gyroplane using the gyroplane rotor pre-rotation control device provided by the present invention, in which the following are marked: rotor blades 1, fuselage 2, landing gear 3, tail boom 4, tail wing 5, propulsion propeller 6, engine 7, tail boom clamping plate 8, frame 9, mast clamping plate 10, upper mast 11, right fuselage 25, front windshield 26, front fuselage 27, front seat 28, left fuselage 29, rear seat 30, engine fairing 31, mast fairing 32, rotor brake pad 33, rotor brake cable 34, and wing 35.

[0067] The present invention has many specific application paths. 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 can be made without departing from the principle of the present invention. These improvements should also be regarded as the protection scope of the present invention.

Claims

1. A rotor pre-rotation control device for a gyroplane, characterized in that: The belt drive mechanism comprises a pre-rotation mechanism and an operating mechanism, wherein the pre-rotation mechanism comprises a belt transmission structure and a tensioning structure, wherein the belt transmission structure is composed of a large pulley and a small pulley through a belt, wherein the large pulley is located on the engine output shaft, and the small pulley is connected to the rotor clutch gear through a transmission mechanism; the tensioning structure comprises a belt tensioning rocker arm, a belt tensioning wheel and a belt pressing block fixed on the belt tensioning rocker arm, a belt relaxation spring is arranged on the belt tensioning rocker arm, and the belt tensioning rocker arm is separated from the belt by the tension of the belt relaxation spring, and the belt pressing block is tightly attached to the belt wound around the small pulley, and the belt The large pulley is in a relaxed state; the operating mechanism is connected to the belt tensioning rocker arm through a pre-rotation cable. When the operating mechanism tightens the pre-rotation cable, the belt tensioning wheel presses the belt so that the belt is in a tensioned state between the large pulley and the small pulley, and the power of the engine output shaft is transmitted to the rotor clutch gear through the belt transmission structure and the transmission mechanism; the operating mechanism includes a front operating lever, a pre-rotation hook and a pre-rotation hook bracket, wherein the pre-rotation hook is arranged on the pre-rotation hook bracket, and the front operating lever controls the tensioning and relaxation of the pre-rotation cable through the pre-rotation hook; the transmission mechanism is a flexible shaft.

2. The gyroplane rotor pre-spin control device according to claim 1, characterized in that: The transmission mechanism is an electric transmission composed of a generator, a cable and a motor.

3. The rotor pre-spin control device for a gyroplane according to claim 1, characterized in that: The transmission mechanism is a hydraulic transmission composed of a hydraulic pump, a hydraulic pipeline and a hydraulic motor.

4. A method for pre-rotation control of a rotor of a gyroplane, characterized in that: The rotor pre-rotation control device of the gyroplane according to claim 1 comprises the following steps: 1) The belt tensioning rocker arm is acted upon by the tension of the belt relaxation spring, so that the belt tensioning wheel does not contact the belt, and at the same time, the belt pressing block is tightly attached to the belt wound around the small pulley, while the belt and the large pulley are in a relaxed state; 2) Start the engine. At this time, the power of the engine output shaft cannot be transmitted to the rotor through the large pulley and belt; 3) The pilot pulls the front control stick back to a certain position and then hangs the pre-spin hook on the bottom of the front control stick; 4) Push the joystick forward, the joystick drives the pre-spin hook to move forward, thereby driving the pre-spin pull line; 5) The pre-spinning wire drives the belt tensioning rocker arm to move, so that the belt tensioning wheel contacts the belt, thereby tightening the belt. At the same time, the belt tightening block separates from the belt. At this time, the engine power is transmitted to the small pulley through the large pulley and the belt; 6) The small pulley drives the rotor clutch gear to rotate through the transmission mechanism. When the rotor clutch gear rotates, the clutch gear is pushed upward to mesh with the rotor large gear, thereby driving the rotor to rotate; 7) After the rotor speed stabilizes, the pilot pulls back the joystick, the pre-rotation cable is relaxed, and the system returns to the state of step 1). After the rotor clutch gear loses power, it is disengaged from the rotor gear by gravity, and then the rotor rotates by inertia. 8) Continue to pull the joystick backward, the tail of the pre-spin hook contacts the pre-spin hook bracket. As you continue to pull backward, the pre-spin hook automatically falls off the front joystick due to gravity, and the rotor pre-spin control is completed.

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