Bleed air electrically operated valve for pressurization system of unmanned aerial vehicle

Abstract

The invention discloses an air entraining electric valve for an unmanned aerial vehicle pressurization system, and belongs to the field of valves, the air entraining electric valve comprises a valve body, the valve body is provided with a motor cavity, a communication guide groove, an oil tank connector, an atmosphere connector and an air entraining connector, the communication guide groove is communicated with the motor cavity, and the oil tank connector, the atmosphere connector and the air entraining connector are all communicated with the communication guide groove; a valve element is arranged in the communication guide groove, a motor, a rotating piece, a connecting piece and a guide rail are arranged in the motor cavity, one end of the connecting piece is in sliding connection with the guide rail, the other end of the connecting piece is fixedly connected with the valve element, the motor is in transmission connection with the rotating piece, the connecting piece comprises a frame body, a moving block located in the frame body is arranged on the rotating piece, and the motor is an anti-reverse motor; the motor drives the rotating piece to rotate, the rotating piece drives the moving block to rotate in the frame when rotating, the moving block touches the frame when rotating so as to drive the connecting piece to move along the guide rail, the connecting piece drives the valve element to move in the communicating guide groove when moving, and therefore power consumption of the air entraining electric valve can be reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, and in particular relates to an air bleed electric valve for a boost system of an unmanned aerial vehicle. Background Art

[0002] Usually, a boost system is provided in the fuel system of a UAV, which pressurizes the fuel tank of the UAV through the boost system. This can ensure that during the flight of the UAV, the air and fuel in the fuel tank of the UAV have a certain boost value relative to the outside atmosphere, thereby ensuring that the engine of the UAV can work stably.

[0003] At present, common UAV boosting systems are equipped with a compressor, a vent pipe and an air bleed electric valve. The compressor is connected to the fuel tank through the vent pipe, so that the pressurized gas generated by the compressor can flow into the fuel tank through the vent pipe to achieve pressurization. The air bleed electric valve is set on the vent pipe to control the on and off of the gas in the vent pipe.

[0004] Usually, the bleed air electric valve is a solenoid valve, which is equipped with an electromagnetic drive component, a spring and a piston. When the electromagnetic drive component is powered on, it controls the piston to move and open the flow channel of the vent pipe, so that the pressurized gas generated by the compressor can flow into the oil tank through the vent pipe to achieve pressurization. When the electromagnetic drive component is powered off, the piston moves under the action of the spring to close the flow channel of the vent pipe, so that the pressurized gas generated by the compressor cannot flow into the oil tank through the vent pipe. With this structure, the bleed air electric valve can control the on and off of the gas in the vent pipe. However, when the pressurized gas generated by the compressor needs to flow into the oil tank through the vent pipe, the electromagnetic drive component needs to be in a powered-on state to ensure that the flow channel in the vent pipe is open, resulting in a large power consumption of the bleed air electric valve. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides an air induction electric valve for a UAV booster system. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0006] In the first aspect, the present invention provides an air bleed electric valve for a UAV boosting system, comprising a valve body, a motor cavity, a connecting guide groove, a fuel tank interface, an atmospheric interface and an air bleed interface are provided on the valve body, the connecting guide groove is connected to the motor cavity, and the fuel tank interface, the atmospheric interface and the air bleed interface are all connected to the connecting guide groove; a valve core is provided in the connecting guide groove, a motor, a rotating member, a connecting member and a guide rail are provided in the motor cavity, one end of the connecting member is slidably connected to the guide rail, and the other end is fixedly connected to the valve core, the motor and the rotating member are transmission-connected, the connecting member comprises a frame, a moving block located in the frame is provided on the rotating member, and the motor is an anti-reverse motor; the motor drives the rotating member to rotate, and when the rotating member rotates, the moving block is driven to rotate in the frame, and when the moving block rotates, it touches the frame to drive the connecting member to move along the guide rail, and when the connecting member moves, it drives the valve core to move in the connecting guide groove, and when the valve core moves to a first position, the fuel tank interface and the atmospheric interface are connected, and when the valve core moves to a second position, the fuel tank interface and the air bleed interface are connected.

[0007] In one embodiment of the present invention, the communication guide groove is a long groove extending along a first direction, and the valve core is provided with a first groove and a second groove in sequence along the first direction;

[0008] When the valve core moves to the first position, the oil tank interface is communicated with the atmosphere interface through the first groove, and when the valve core moves to the second position, the oil tank interface is communicated with the air bleed interface through the second groove.

[0009] In one embodiment of the present invention, a first sealing ring, a second sealing ring and a third sealing ring are arranged between the valve core and the groove wall of the connecting guide groove, the first sealing ring and the second sealing ring are arranged on both sides of the first groove along the first direction, and the second sealing ring and the third sealing ring are arranged on both sides of the second groove along the first direction.

[0010] In one embodiment of the present invention, a mounting frame and a gear assembly are further provided in the motor cavity, the mounting frame is fixed to the inner wall of the motor cavity, the motor is mounted on the mounting frame, and the gear assembly includes a first shaft, a second shaft, a third shaft, a first gear, a second gear, a third gear, a fourth gear and a fifth gear;

[0011] The first shaft, the second shaft and the third shaft are all mounted on the mounting frame, the first shaft is located between the second shaft and the third shaft, the first gear is mounted on the motor shaft of the motor, the second gear and the fourth gear are both arranged on the first shaft, the third gear is arranged on the second shaft, the fifth gear is arranged on the third shaft, and the third shaft is fixedly connected to the rotating member;

[0012] The second gear includes a first large tooth portion and a first small tooth portion, the number of teeth of the first large tooth portion is greater than the number of teeth of the first small tooth portion, the third gear includes a second large tooth portion and a second small tooth portion, the number of teeth of the second large tooth portion is greater than the number of teeth of the second small tooth portion, and the fourth gear includes a third large tooth portion and a third small tooth portion, the number of teeth of the third large tooth portion is greater than the number of teeth of the third small tooth portion;

[0013] The first gear meshes with the first large tooth portion, the first small tooth portion meshes with the second large tooth portion, the second small tooth portion meshes with the third large tooth portion, and the third small tooth portion meshes with the fifth gear.

[0014] In one embodiment of the present invention, a rotary potentiometer for detecting the rotation angle of the third shaft is further provided in the motor cavity. The rotary potentiometer is fixed on the mounting frame and fixedly connected to the third shaft.

[0015] In one embodiment of the present invention, the moving block includes a body and a sleeve sleeved outside the body, the sleeve and the body are rotatably connected, the body and the rotating member are connected, and the sleeve and the frame are rollingly matched.

[0016] In one embodiment of the present invention, a guide groove extending along a first direction is provided on the guide rail, one end of the connecting piece extends into the guide groove, and the other end is provided with a first fastening hole, and a second fastening hole is provided on the valve core. The air induction electric valve also includes a fastener, which passes through the first fastening hole and the second fastening hole for fastening to fix the connecting piece and the valve core in a fixed connection.

[0017] In one embodiment of the present invention, the first end of the connecting guide groove is connected to the motor cavity, and the second end is connected to the external space of the air intake electric valve. The second end of the connecting guide groove is provided with an exhaust cover, and the exhaust cover is provided with multiple exhaust holes.

[0018] In one embodiment of the present invention, a spring retaining ring is further provided at the second end of the communication guide groove for limiting the exhaust cover from being separated from the communication guide groove.

[0019] In one embodiment of the present invention, the valve body includes a base and a cover plate, the base and the cover plate are detachably connected, and a cover plate sealing ring is provided between the base and the cover plate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the above scheme of the present application, the air bleed electric valve includes a valve body, on which a motor cavity, a connecting guide groove, a tank interface, an atmosphere interface and an air bleed interface are provided. The connecting guide groove is connected to the motor cavity, and the tank interface, the atmosphere interface and the air bleed interface are all connected to the connecting guide groove; a valve core is provided in the connecting guide groove, and a motor, a rotating part, a connecting part and a guide rail are provided in the motor cavity, one end of the connecting part is slidably connected to the guide rail, and the other end is fixedly connected to the valve core, the motor and the rotating part are transmission-connected, the connecting part includes a frame, and the rotating part includes a moving block arranged in the frame. By adopting this structure, the motor can drive the rotating part to rotate, and when the rotating part rotates, it drives the moving block to rotate in the frame. When the moving block rotates, it touches the frame to drive the connecting part to move along the guide rail. When the connecting part moves, it drives the valve core to move in the connecting guide groove. When the valve core moves to the first position, the oil tank interface and the atmosphere interface are connected, so that the oil tank can be connected to the atmosphere outside the bleed air electric valve to achieve pressure relief. When the valve core moves to the second position, the oil tank interface and the bleed air interface are connected, so that the compressor in the UAV boosting system can deliver pressurized gas to the oil tank through the bleed air interface, thereby pressurizing the oil tank and ensuring that the engine of the UAV can work stably.

[0022] Furthermore, when the motor is energized and controls the valve core to move to the second position, the motor can be powered off. At this time, the valve core will not move back, so there is no need to control the motor to be in the energized state all the time to keep the valve core in the second position, thereby avoiding increasing the power consumption of the air induction electric valve when the motor is always energized, thereby reducing the power consumption of the air induction electric valve.

[0023] In addition, when the motor is an anti-reverse motor, the motor has a self-locking capability, which can further limit the movement of the valve core, improve the stability of the valve core, and further improve the stability of the air induction electric valve.

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of an electric air induction valve provided in an embodiment of the present invention Figure 1 ;

[0026] Figure 2 Schematic diagram of an electric air induction valve provided in an embodiment of the present invention Figure 2 ;

[0027] Figure 3 is a top view of a rotating member, a connecting member, a guide rail and a valve core in an embodiment of the present invention;

[0028] Figure 4 1 is a front view of a rotating member, a connecting member, a guide rail and a valve core in an embodiment of the present invention;

[0029] Figure 5Schematic diagram of the valve core and the air bleed interface in an embodiment of the present invention;

[0030] Figure 6 is a schematic diagram of a motor, a gear assembly, a rotary potentiometer, and a rotating member in an embodiment of the present invention;

[0031] Figure 7 Schematic diagram of a gear assembly and a rotary potentiometer in an embodiment of the present invention.

[0032] Figure markings: 1-valve body, 11-motor cavity, 111-cover sealing ring, 12-connecting guide groove, 121-exhaust cover, 122-spring retaining ring, 13-oil tank interface, 14-atmospheric interface, 15-air bleed interface, 2-valve core, 21-first groove, 22-second groove, 23-first sealing ring, 24-second sealing ring, 25-third sealing ring, 3-motor, 4-mounting frame, 5-gear assembly, 6-rotating part, 7-moving block, 8-connecting part, 81-frame, 9-guide rail, 10-rotary potentiometer. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0034] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The embodiment of the present invention provides an air bleed electric valve for a UAV supercharging system, including a valve body 1, on which a motor cavity 11, a connecting guide groove 12, a fuel tank interface 13, an atmosphere interface 14 and an air bleed interface 15 are provided. The connecting guide groove 12 is connected to the motor cavity 11, and the fuel tank interface 13, the atmosphere interface 14 and the air bleed interface 15 are all connected to the connecting guide groove 12; a valve core 2 is provided in the connecting guide groove 12, and a motor 3, a rotating member 6, a connecting member 8 and a guide rail 9 are provided in the motor cavity 11, one end of the connecting member 8 is slidably connected to the guide rail 9, and the other end is fixedly connected to the valve core 2, and the motor 3 is transmission connected with the rotating member 6, the connecting member 8 includes a frame 81, the rotating member 6 is provided with a moving block 7 located in the frame 81, and the motor 3 is an anti-reverse motor; the motor 3 drives the rotating member 6 to rotate, and when the rotating member 6 rotates, the moving block 7 is driven to rotate in the frame 81, and when the moving block 7 rotates, it touches the frame 81 to drive the connecting member 8 to move along the guide rail 9, and when the connecting member 8 moves, it drives the valve core 2 to move in the connecting guide groove 12, when the valve core 2 moves to the first position, the oil tank interface 13 is connected with the atmosphere interface 14, and when the valve core 2 moves to the second position, the oil tank interface 13 is connected with the air bleed interface 15.

[0035] In some embodiments of the present application, the oil tank interface 13 includes a joint and a first flow channel, the joint and the first flow channel are threadedly connected, the first flow channel is connected to the connecting guide groove 12, and the oil tank interface 13 is used to be connected to the oil tank through a pipeline.

[0036] In some embodiments of the present application, the atmospheric interface 14 includes a joint and a second flow channel, the joint and the second flow channel are threadedly connected, the second flow channel is connected to the connecting guide groove 12, and the atmospheric interface 14 is used to communicate with the external space of the air bleed electric valve.

[0037] In some embodiments of the present application, the second flow channel includes a vertical flow channel and a horizontal flow channel that are connected, the vertical flow channel is arranged in parallel with the first flow channel, the horizontal flow channel is connected to the joint, and a plug is provided on the vertical flow channel. In this way, the joint connection direction of the second flow channel can be changed to avoid the joints of the atmosphere interface 14 and the joint and the tank interface 13 being limited to each other and affecting the installation of the air induction electric valve.

[0038] In some embodiments of the present application, the bleed air interface 15 includes a connector and a third flow channel, the connector and the third flow channel are threadedly connected, the third flow channel is connected to the connecting guide groove 12, and the bleed air interface 15 is used to be connected to the compressor of the UAV boosting system through a pipeline.

[0039] In some embodiments of the present application, the UAV pressurization system includes a compressor, a connecting pipe and a safety valve. The compressor is connected to the bleed air interface 15 through the connecting pipe, so that the pressurized gas generated by the compressor can be transported to the bleed air electric valve through the connecting pipe, and then transported to the fuel tank through the bleed air electric valve.

[0040] In some embodiments of the present application, the valve core 2 may be a columnar component.

[0041] In some embodiments of the present application, the rotating member 6 may be a rotating disk, the moving block 7 is fixed to the edge of the rotating disk, and the rotating disk drives the moving block 7 to make a circular motion. The rotating member 6 may also be a rotating rod, the moving block 7 is fixed to the end of the rotating rod, and the rotating rod drives the moving block 7 to make a circular motion.

[0042] In some embodiments of the present application, the guide rail 9 is fixed on the inner wall of the motor cavity 11, and a positioning hole extending along the first direction is provided in the guide rail 9, and one end of the connecting member 8 extends into the positioning hole and slidably cooperates with the positioning hole.

[0043] In some embodiments of the present application, the moving block 7 may be a cylindrical block.

[0044] In some embodiments of the present application, the connecting member 8 is a rod-shaped structure, and the connecting member 8 includes a first rod body, a frame body 81, and a second rod body connected in sequence, the first rod body is slidably connected to the guide rail 9, the second rod body is fixedly connected to the valve core 2, the frame body 81 is a rectangular frame body 81, and the motion block 7 is located inside the rectangular frame body 81. In this way, when the rotating member 6 drives the motion block 7 to rotate in the frame body 81, the motion block 7 can touch the frame body 81 to drive the connecting member 8 to move in the first direction, thereby driving the valve core 2 to move in the first direction.

[0045] In some embodiments of the present application, since the moving block 7 performs a circular motion relative to the rotation center of the rotating member 6, the moving block 7 not only moves in the first direction, but also moves in the second direction, and the first direction and the second direction are perpendicular. In the embodiment of the present application, the width of the frame 81 along the second direction is greater than twice the rotation radius of the moving block 7, so that the moving block 7 can be ensured to rotate normally, and the moving block 7 and the frame 81 are prevented from being limited to each other, resulting in the valve core 2 not being able to move normally.

[0046] In some embodiments of the present application, the anti-reverse motor is a motor 3 that has a function of preventing the motor 3 from rotating in reverse, such as a stepper motor 3, a DC motor 3, and the like.

[0047] In some embodiments of the present application, when the moving block 7 moves to the first position, the valve core 2 is located at the first position, and when the moving block 7 moves to the second position, the valve core 2 is located at the second position. The first position is the position where the moving block 7 and the guide rail 9 are farthest apart, and the second position is the position where the moving block 7 and the guide rail 9 are closest apart. In this way, when the moving block 7 moves to the first position and the second position, when the valve core 2 applies a force along the first direction to the connecting member 8, the connecting member 8 can apply a force along the radial direction of the rotating disk to the moving block 7. At this time, since the moving block 7 does not rotate under this force, the limiting effect between the rotating member 6 and the third rotating shaft can be used to further limit the movement and retreat of the valve core 2, thereby further improving the stability of the valve core 2.

[0048] In the above scheme of the present application, the air bleed electric valve includes a valve body 1, on which a motor cavity 11, a connecting guide groove 12, a tank interface 13, an atmosphere interface 14 and an air bleed interface 15 are provided. The connecting guide groove 12 is connected to the motor cavity 11, and the tank interface 13, the atmosphere interface 14 and the air bleed interface 15 are all connected to the connecting guide groove 12; a valve core 2 is provided in the connecting guide groove 12, and a motor 3, a rotating member 6, a connecting member 8 and a guide rail 9 are provided in the motor cavity 11, one end of the connecting member 8 is slidably connected to the guide rail 9, and the other end is fixedly connected to the valve core 2, the motor 3 and the rotating member 6 are transmission-connected, the connecting member 8 includes a frame 81, and the rotating member 6 includes a moving block 7 arranged in the frame 81. With this structure, the motor 3 can drive the rotating part 6 to rotate. When the rotating part 6 rotates, it drives the moving block 7 to rotate in the frame 81. When the moving block 7 rotates, it touches the frame 81 to drive the connecting part 8 to move along the guide rail 9. When the connecting part 8 moves, it drives the valve core 2 to move in the connecting guide groove 12. When the valve core 2 moves to the first position, the oil tank interface 13 and the atmosphere interface 14 are connected, so that the oil tank can be connected to the atmosphere outside the bleed air electric valve to achieve pressure relief. When the valve core 2 moves to the second position, the oil tank interface 13 and the bleed air interface 15 are connected, so that the compressor in the UAV boosting system can deliver pressurized gas to the oil tank through the bleed air interface 15, thereby pressurizing the oil tank and ensuring that the engine of the UAV can work stably.

[0049] Furthermore, when the motor 3 is energized and controls the valve core 2 to move to the second position, the motor 3 can be powered off. At this time, the valve core 2 will not move back, so there is no need to control the motor 3 to be in the energized state all the time to keep the valve core 2 in the second position, thereby avoiding increasing the power consumption of the air induction electric valve when the motor 3 is always energized, thereby reducing the power consumption of the air induction electric valve.

[0050] In addition, when the motor 3 is an anti-reverse motor, the motor 3 has a self-locking capability, thereby further limiting the movement of the valve core 2, improving the stability of the valve core 2, and further improving the stability of the air induction electric valve. At the same time, the motor 3 drives the valve core 2 to move, so that the air induction electric valve can achieve zero-pressure starting.

[0051] In some embodiments of the present application, the connecting guide groove 12 is a long groove extending in the first direction, and the valve core 2 is provided with a first groove 21 and a second groove 22 in sequence along the first direction; when the valve core 2 moves to the first position, the oil tank interface 13 is connected to the atmosphere interface 14 through the first groove 21, and when the valve core 2 moves to the second position, the oil tank interface 13 is connected to the air bleed interface 15 through the second groove 22. With this structure, when the valve core 2 moves to the first position, the oil tank interface 13 can be connected to the atmosphere interface 14 through the first groove 21 to achieve pressure relief; when the valve core 2 moves to the second position, the oil tank interface 13 can be connected to the air bleed interface 15 through the second groove 22, so that the compressor of the UAV boosting system can deliver gas to the oil tank through the air bleed interface 15 to achieve boosting.

[0052] In some embodiments of the present application, the first direction is the length direction of the connecting rod. Figure 1 As shown, the first direction is Figure 1 The direction x in .

[0053] In some embodiments of the present application, the first groove 21 and the second groove 22 are both annular structures, so that ventilation can be achieved around the outer surface of the valve core 2, thereby optimizing the setting positions of the oil tank interface 13, the atmosphere interface 14 and the air bleed interface 15.

[0054] In some embodiments of the present application, Figure 1 , Figure 2 and Figure 5 As shown, a first sealing ring 23, a second sealing ring 24 and a third sealing ring 25 are arranged between the valve core 2 and the groove wall of the connecting guide groove 12. The first sealing ring 23 and the second sealing ring 24 are arranged on both sides of the first groove 21 along the first direction, and the second sealing ring 24 and the third sealing ring 25 are arranged on both sides of the second groove 22 along the first direction. With this structure, the first sealing ring 23 and the second sealing ring 24 are used to seal both sides of the first groove 21, so that the gas in the first groove 21 can be prevented from leaking out from both sides of the first groove 21; the second sealing ring 24 and the third sealing ring 25 are used to seal the second groove 22, so that the gas in the second groove 22 can be prevented from leaking out from both sides of the second groove 22, thereby improving the sealing performance of the air induction electric valve.

[0055] In some embodiments of the present application, there are multiple second sealing rings 24, and the multiple second sealing rings 24 are sequentially arranged along the first direction. In this way, the sealing performance between the first groove 21 and the second groove 22 can be improved by sealing with multiple second sealing rings 24, so as to prevent the gas in the air bleed interface 15 from flowing into the oil tank interface 13 and the atmosphere interface 14 through the gap between the first groove 21 and the second groove 22 when the valve core 2 is in the first position, thereby affecting the pressure relief effect of the oil tank; and to prevent the atmosphere interface 14 from communicating with the oil tank interface 13 and the air bleed interface 15 through the gap between the first groove 21 and the second groove 22 when the valve core 2 is in the second position, thereby affecting the pressurization effect of the oil tank.

[0056] In some embodiments of the present application, Figure 1 , Figure 2 , Figure 6 and Figure 7As shown, a mounting frame 4 and a gear assembly 5 are also provided in the motor cavity 11. The mounting frame 4 is fixed to the inner wall of the motor cavity 11, and the motor 3 is mounted on the mounting frame 4. The gear assembly 5 includes a first shaft, a second shaft, a third shaft, a first gear, a second gear, a third gear, a fourth gear and a fifth gear; the first shaft, the second shaft and the third shaft are all mounted on the mounting frame, the first shaft is located between the second shaft and the third shaft, the first gear is mounted on the motor shaft of the motor 3, the second gear and the fourth gear are both arranged on the first shaft, the third gear is arranged on the second shaft, and the fifth gear is arranged on the The wheel is arranged on the third shaft, and the third shaft is fixedly connected to the rotating member; the second gear includes a first large tooth portion and a first small tooth portion, the number of teeth of the first large tooth portion is greater than the number of teeth of the first small tooth portion, the third gear includes a second large tooth portion and a second small tooth portion, the number of teeth of the second large tooth portion is greater than the number of teeth of the second small tooth portion, and the fourth gear includes a third large tooth portion and a third small tooth portion, the number of teeth of the third large tooth portion is greater than the number of teeth of the third small tooth portion; the first gear meshes with the first large tooth portion, the first small tooth portion and the second large tooth portion meshes, the second small tooth portion meshes with the third large tooth portion, and the third small tooth portion meshes with the fifth gear. With this structure, the motor 3 and the gear assembly 5 are fixed by the mounting frame 4, which can improve the stability of the motor 3 and the gear assembly 5 and ensure that the gear assembly 5 can move normally. In addition, by decelerating through the gear assembly 5, the movement speed of the valve core 2 can be reduced, so that the motor 3 can accurately control the movement position of the valve core 2.

[0057] Among them, when the motor 3 drives the first gear to rotate, the first gear drives the first large tooth portion on the second gear to rotate to achieve first-stage deceleration; when the second gear rotates, the first small tooth portion on the second gear drives the second large tooth portion on the third gear to rotate to achieve second-stage deceleration; when the third gear rotates, the second small tooth portion on the third gear drives the third large tooth portion on the fourth gear to rotate to achieve third-stage deceleration; when the fourth gear rotates, the third small tooth portion on the fourth gear drives the fifth gear to rotate to achieve fourth-stage deceleration.

[0058] It can be understood that the first shaft can be fixed on the mounting frame 4, and the second gear and the fourth gear are both rotationally connected to the first shaft, or the first shaft is rotationally connected to the mounting frame 4, one of the second gear and the fourth gear is fixed on the first shaft, and the other is rotationally connected to the first shaft.

[0059] It can be understood that the second shaft is rotatably connected to the mounting frame 4, the third gear is fixed on the second shaft, the third shaft is rotatably connected to the mounting frame 4, and the fifth gear is fixed on the third shaft.

[0060] In some embodiments of the present application, Figure 1 , Figure 2 , Figure 6 and Figure 7As shown, a rotary potentiometer 10 for detecting the rotation angle of the third axis is also provided in the motor cavity 11. The rotary potentiometer 10 is fixed on the mounting frame 4 and fixedly connected to the third axis. The rotary potentiometer 10 is an existing potentiometer capable of detecting the rotation angle, such as an RV12 type rotary potentiometer. With this structure, the rotary potentiometer 10 is connected to the third axis, so that the rotary potentiometer 10 can detect the rotation angle of the third axis, and then can accurately detect the specific position of the valve core 2, so as to facilitate the control of the moving direction and moving distance of the valve core 2 according to the current position of the valve core 2.

[0061] In some embodiments of the present application, the motion block 7 includes a body and a sleeve sleeved outside the body, the sleeve and the body are rotatably connected, the body is connected to the rotating member 6, and the sleeve and the frame 81 are rollingly matched. With this structure, when the rotating member 6 rotates, the sleeve can be driven to roll along the inner surface of the frame 81. Through the rolling match between the sleeve and the frame 81, the friction between the sleeve and the frame 81 can be reduced, and the friction between the motion block 7 and the frame 81 is prevented from being large and hindering the rotation of the rotating member 6, thereby hindering the movement of the valve core 2, causing the air induction electric valve to fail to work normally.

[0062] In some embodiments of the present application, a guide groove extending in a first direction is provided on the guide rail 9, one end of the connector 8 extends into the guide groove, and the other end is provided with a first fastening hole, and the valve core 2 is provided with a second fastening hole, and the air induction electric valve further includes a fastener, which passes through the first fastening hole and the second fastening hole for fastening, so that the connector 8 and the valve core 2 are fixedly connected. With this structure, the connector 8 and the valve core 2 are fastened by the fastener, which can make the connector 8 and the valve core 2 more convenient to disassemble and assemble.

[0063] In some embodiments of the present application, the fastener may be a pin structure, and the pin structure is fastened by passing through the first fastening hole and the second fastening hole at the same time, so that the connector 8 and the valve core 2 can be fixedly connected. The fastener may also be a screw, and the first fastening hole and the second fastening hole may be screw holes, and the screw is fastened by passing through the first fastening hole and the second fastening hole, so that the connector 8 and the valve core 2 can be fixedly connected.

[0064] In some embodiments of the present application, Figure 1 and Figure 2 As shown, the first end of the communication guide groove 12 is communicated with the motor cavity 11, and the second end is communicated with the external space of the air bleed electric valve. The second end of the communication guide groove 12 is provided with an exhaust cover 121, and the exhaust cover 121 is provided with a plurality of exhaust holes. With this structure, exhaust is performed through the exhaust holes, so that the air pressure at the position of the second end of the communication guide groove 12 can be kept balanced, and the air pressure at the second end of the communication guide groove 12 is prevented from being too high or too low to affect the movement of the valve core 2.

[0065] In some embodiments of the present application, Figure 1and Figure 2 As shown, the second end of the connecting guide groove 12 is also provided with a spring retainer 122 for limiting the exhaust cover 121 from being separated from the connecting guide groove 12. With this structure, the spring retainer 122 can prevent the exhaust cover 121 from being separated from the connecting guide groove 12, thereby improving the stability of the exhaust cover 121 installation.

[0066] In some embodiments of the present application, the valve body 1 includes a base and a cover plate, the base and the cover plate are detachably connected, and a cover plate sealing ring 111 is provided between the base and the cover plate. With this structure, the cover plate sealing ring 111 can seal the motor cavity 11 on the base to prevent external impurities such as water vapor and dust from entering the motor cavity 11 and affecting the movement of the motor 3, the gear assembly 5, the rotating member 6 and the moving block 7.

[0067] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0068] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0069] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An air bleed electric valve for a UAV boost system, characterized in that: It comprises a valve body, on which a motor cavity, a connecting guide groove, a fuel tank interface, an atmosphere interface and an air bleed interface are provided, the connecting guide groove is connected with the motor cavity, and the fuel tank interface, the atmosphere interface and the air bleed interface are all connected with the connecting guide groove; The connecting guide groove is provided with a valve core, the motor cavity is provided with a motor, a rotating member, a connecting member and a guide rail, one end of the connecting member is slidably connected to the guide rail, and the other end is fixedly connected to the valve core, the motor is transmission-connected to the rotating member, the connecting member includes a frame, the rotating member is provided with a moving block located in the frame, and the motor is an anti-reverse motor; The motor drives the rotating part to rotate, and when the rotating part rotates, it drives the moving block to rotate within the frame. When the moving block rotates, it touches the frame to drive the connecting part to move along the guide rail. When the connecting part moves, it drives the valve core to move within the connecting guide groove. When the valve core moves to a first position, the oil tank interface is connected to the atmosphere interface. When the valve core moves to a second position, the oil tank interface is connected to the air bleed interface.

2. The bleed air electric valve for the UAV boost system according to claim 1, characterized in that: The communicating guide groove is a long groove extending along a first direction, and the valve core is provided with a first groove and a second groove in sequence along the first direction; When the valve core moves to the first position, the oil tank interface is communicated with the atmosphere interface through the first groove, and when the valve core moves to the second position, the oil tank interface is communicated with the air bleed interface through the second groove.

3. The bleed air electric valve for the UAV boost system according to claim 2, characterized in that: A first sealing ring, a second sealing ring and a third sealing ring are arranged between the valve core and the groove wall of the connecting guide groove. The first sealing ring and the second sealing ring are arranged on both sides of the first groove along the first direction, and the second sealing ring and the third sealing ring are arranged on both sides of the second groove along the first direction.

4. The bleed air electric valve for the UAV boost system according to claim 1, characterized in that: A mounting frame and a gear assembly are also provided in the motor cavity, wherein the mounting frame is fixed to the inner wall of the motor cavity, the motor is mounted on the mounting frame, and the gear assembly includes a first shaft, a second shaft, a third shaft, a first gear, a second gear, a third gear, a fourth gear and a fifth gear; The first shaft, the second shaft and the third shaft are all mounted on the mounting frame, the first shaft is located between the second shaft and the third shaft, the first gear is mounted on the motor shaft of the motor, the second gear and the fourth gear are both arranged on the first shaft, the third gear is arranged on the second shaft, the fifth gear is arranged on the third shaft, and the third shaft is fixedly connected to the rotating member; The second gear includes a first large tooth portion and a first small tooth portion, the number of teeth of the first large tooth portion is greater than the number of teeth of the first small tooth portion, the third gear includes a second large tooth portion and a second small tooth portion, the number of teeth of the second large tooth portion is greater than the number of teeth of the second small tooth portion, the fourth gear includes a third large tooth portion and a third small tooth portion, the number of teeth of the third large tooth portion is greater than the number of teeth of the third small tooth portion; The first gear meshes with the first large tooth portion, the first small tooth portion meshes with the second large tooth portion, the second small tooth portion meshes with the third large tooth portion, and the third small tooth portion meshes with the fifth gear.

5. The bleed air electric valve for the UAV boost system according to claim 4, characterized in that: A rotary potentiometer for detecting the rotation angle of the third shaft is also provided in the motor cavity. The rotary potentiometer is fixed on the mounting frame and fixedly connected to the third shaft.

6. The bleed air electric valve for the UAV boost system according to claim 1, characterized in that: The moving block comprises a body and a sleeve sleeved outside the body, the sleeve and the body are rotatably connected, the body and the rotating member are connected, and the sleeve and the frame are rollingly matched.

7. The bleed air electric valve for the UAV boost system according to claim 1, characterized in that: The guide rail is provided with a guide groove extending along a first direction, one end of the connecting piece extends into the guide groove, and the other end is provided with a first fastening hole, and the valve core is provided with a second fastening hole. The air induction electric valve also includes a fastener, and the fastener passes through the first fastening hole and the second fastening hole for fastening so that the connecting piece and the valve core are fixedly connected.

8. The bleed air electric valve for the UAV boost system according to claim 1, characterized in that: The first end of the connecting guide groove is connected to the motor cavity, and the second end is connected to the external space of the air induction electric valve. The second end of the connecting guide groove is provided with an exhaust cover, and the exhaust cover is provided with a plurality of exhaust holes.

9. The bleed air electric valve for the UAV boost system according to claim 8, characterized in that: The second end of the connecting guide groove is also provided with a spring retaining ring for limiting the exhaust cover from being separated from the connecting guide groove.

10. The bleed air electric valve for the UAV boost system according to claim 1, characterized in that: The valve body comprises a base and a cover plate, the base and the cover plate are detachably connected, and a cover plate sealing ring is provided between the base and the cover plate.

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