Hermetically sealed air-cooled internal rotor propulsion motor for an aircraft

Abstract

The application discloses a sealed air-cooled inner rotor propulsion motor for an aircraft, and relates to the technical field of motors, which comprises a motor body, an air duct pipe arranged outside the motor body, a connecting mechanism arranged between the air duct pipe and the motor body, the air duct pipe being used for conveying gas to achieve heat dissipation, and the connecting mechanism being used for connecting the motor body and the air duct pipe; a driving shaft of the motor body drives a propeller to rotate, so that the aircraft ascends; in the process of movement of the aircraft, external gas flows to the side close to the air duct pipe and flows through a sealed shell of the motor body through the air duct pipe, so that heat generated by the motor body during operation is taken away, thereby realizing the effect of air-cooled cooling; the motor body is arranged on a mounting bracket of the aircraft, and a corresponding damping pad is arranged on the mounting bracket, so that vibration generated by the motor body during operation is weakened and dispersed, thereby achieving the effect of vibration elimination and shock prevention.

Description

Technical Field

[0001] This invention relates to the field of motor technology, specifically a sealed, air-cooled internal rotor propulsion motor for aircraft. Background Technology

[0002] As a key component of the aircraft's power system, the propulsion motor directly affects the aircraft's thrust efficiency, stability, and endurance. With the rapid development of electric aircraft and UAV technologies, higher requirements are being placed on the power density, heat dissipation performance, and vibration control of internal rotor propulsion motors. Traditional propulsion motors mostly use open air-cooling or liquid-cooling methods, but under high-speed or long-term operating conditions, a large amount of heat can easily accumulate inside the motor. If heat dissipation is insufficient, it will lead to excessive temperature rise, decreased efficiency, and even failures such as magnet unwinding and insulation aging, seriously affecting the motor's lifespan and flight safety.

[0003] Existing propulsion motors typically use a constant number of heat sinks. As a result, the fixed heat sink design cannot dynamically adjust the heat dissipation area according to the actual load and speed of the motor, leading to insufficient heat dissipation during high-power operation and wasted heat dissipation resources during low-power operation. Summary of the Invention

[0004] The purpose of this invention is to provide a sealed, air-cooled internal rotor propulsion motor for aircraft, in order to solve the problems raised in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A sealed, air-cooled internal rotor propulsion motor for aircraft includes a motor body, an air duct is provided on the outside of the motor body, and a connecting mechanism is provided between the air duct and the motor body. The air duct is used to transport gas to achieve heat dissipation, and the connecting mechanism is used to connect the motor body and the air duct.

[0007] The drive shaft of the motor drives the propeller to rotate, causing the aircraft to take off. During the movement of the aircraft, the outside air flows towards the side near the air duct and then flows through the sealed shell of the motor body through the air duct, thereby carrying away the heat generated by the motor body during operation, thus achieving the effect of air cooling. By mounting the motor body on the aircraft's mounting bracket and installing corresponding shock-absorbing pads on the mounting bracket, the vibration generated by the motor body during operation is weakened and dispersed, thereby achieving the effect of harmonic elimination and vibration prevention.

[0008] Preferably, the air duct is composed of an air inlet pipe, a connecting pipe, and a contraction pipe. The connecting pipe is connected to the motor body through a connecting mechanism. One end of the connecting pipe is provided with an air inlet pipe, and the other end of the connecting pipe is provided with a contraction pipe. The drive shaft of the motor body extends to the side close to the air inlet pipe. A turbofan is provided on the side of the drive shaft of the motor body located on the air inlet pipe. The turbofan is rotatably connected to the air inlet pipe.

[0009] While the drive shaft of the motor body drives the propeller to rotate, it also drives the turbofan to rotate. During the rotation of the turbofan, the outside air is introduced to the side near the intake pipe, so that the outside air enters the air duct along the intake pipe and flows through the intake pipe, connecting pipe and contraction pipe in sequence. Because the diameter of the contraction pipe is reduced, that is, the diameter of the intake pipe and the connecting pipe is larger than the diameter of the contraction pipe, the flow time of the outside air in the connecting pipe area is longer than the flow time of the outside air in the contraction pipe area. This allows the outside air to prolong the contact time with the motor body, thereby carrying away the heat generated by the motor body. When flowing through the contraction pipe, the flow rate of the outside air carrying heat is accelerated, thereby dissipating the heat more quickly and ensuring the stable operation of the motor body.

[0010] Preferably, the connecting mechanism consists of several air guide blocks and a support group. The air guide blocks are located on the side of the connecting pipe closer to the air inlet pipe, and the support group is provided on the side of the air guide blocks away from the air inlet pipe.

[0011] During the process of transporting external gas from the intake pipe to the connecting pipe, the external gas first encounters the air guide block, which diverts the external gas. The external gas then flows from the side of the air guide block to the side of the support assembly. Since the air guide block and the support assembly are connected to the side wall of the motor body, the heat generated by the motor body is transferred outward through the support assembly. In other words, the support assembly can act as a heat sink for the motor body, thus conducting heat dissipation for the motor body.

[0012] Preferably, one of the air guide blocks and a support assembly are combined to form an air guide body, and an air supply channel is provided between two adjacent air guide bodies, the air supply channel being connected to an air duct pipe.

[0013] Outside air flows through the air guide block to the air delivery duct, and is then transported to the side closest to the contraction tube.

[0014] Preferably, the support assembly includes two movable plates, which are symmetrically arranged. A drive assembly is provided between the movable plates and the air guide block. The movable plates are driven by the drive assembly. The upper end face of the movable plate is slidably connected to the air duct, and the lower end face of the movable plate is slidably connected to the motor body.

[0015] As the motor's rotational speed increases, the heat generated during operation also increases. Consequently, the controller activates the drive unit, causing it to move two movable plates to opposite sides. These plates then enter the air duct, connecting with the gap between the air duct and the two movable plates. This allows both sidewalls of the movable plates to contact the outside air. The extended movable plates not only improve the motor's heat dissipation efficiency but also reduce the size of the air duct's flow path. This increases the airflow velocity through the connecting pipe, allowing for faster airflow and further enhancing heat dissipation efficiency. This ensures stable operation of the motor.

[0016] When the speed of the motor body decreases, the controller controls the drive group to reset, and then the two moving plates are transported to the side away from the air supply channel, so that the side wall of the two moving plates opposite each other is isolated from the air supply channel again, so that the outside air can only be cooled through the original air supply channel.

[0017] Preferably, the drive assembly consists of two rotating shafts and several connecting rods. The rotating shafts are disposed inside the air guide block and are driven by a micro motor. One end of each connecting rod is connected to the rotating shaft, and the other end of each connecting rod is hinged to the moving plate.

[0018] When the speed of the motor body increases, the controller controls the micro motor to start. The drive shafts of the two micro motors drive the two rotating shafts to rotate in opposite directions. As the rotating shafts rotate, they drive the connecting rod to rotate. In turn, the connecting rod drives the moving plate to rotate. The moving plate moves out of the space between the air guide block and the tail plate, causing the moving plate to move closer to the air duct.

[0019] Preferably, a pressure chamber is provided in the inner wall of the air duct, a hydraulic cylinder is provided in the pressure chamber, a push plate is provided at the output end of the hydraulic cylinder, hydraulic oil is filled between the push plate and the pressure chamber, a tail plate is provided on the side of the moving plate away from the air guide block, a push rod is provided on the side of the tail plate close to the moving plate, the push rod is slidably connected to the tail plate, one end of the push rod is hinged to the moving plate, a secondary cavity is provided in the tail plate, the secondary cavity is also filled with hydraulic oil, several secondary cavities are interconnected through pipes, and the secondary cavities are connected to the pressure chamber through pipes.

[0020] While the micro motor drives the moving plate to move closer to the air guide block, the controller activates the hydraulic cylinder in the pressure chamber. The push rod of the hydraulic cylinder drives the push plate to move, and the push plate squeezes the hydraulic oil in the pressure chamber, causing the hydraulic oil in the pressure chamber to flow through the pipe to the secondary chamber, increasing the amount of hydraulic oil in the secondary chamber. This increases the amount of hydraulic oil in the secondary chamber, which in turn pushes the push rod to extend from the tail plate. The push rod and the connecting rod then move synchronously, causing the moving plate to move from between the air guide block and the tail plate towards the air delivery channel. This connects the space between two adjacent moving plates with the air delivery channel. A portion of the external gas diverted by the air guide block enters the space between the two moving plates, and through this space, it carries away the heat generated by the motor body, thereby increasing the heat dissipation area of ​​the motor body.

[0021] Preferably, there are gaps between the movable plates in the same group.

[0022] Preferably, a speed sensor is installed inside the turbofan.

[0023] The drive shaft of the motor body drives the propeller to rotate, which in turn drives the turbofan to rotate. While the turbofan is rotating, the speed sensor inside it detects the speed of the motor body, converts the speed signal into an electrical signal in real time, and transmits it to the controller. The controller drives the micro motor in the air guide block and the hydraulic cylinder in the air duct according to the change in speed, thereby causing the moving plate to move, thereby expanding the heat dissipation area of ​​the motor body and achieving a better heat dissipation effect.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] The rotational speed of the motor body is detected by a speed sensor. When the speed is high, several moving plates are moved to the side closer to the air supply channel, so that the moving plates extend into the air supply channel. This makes the space between two adjacent moving plates connected to the air supply channel. As the external gas diverted by the air guide block flows through the moving plates, it is diverted again, so that both sides of the moving plates can contact the external gas. The unfolded moving plates increase the heat dissipation area between the external gas and the moving plates, thereby improving the heat dissipation efficiency. Attached Figure Description

[0026] Figure 1 This is a perspective view of the present invention;

[0027] Figure 2 This is a schematic diagram of the air duct structure;

[0028] Figure 3 This is a front view of the cross-section of the air duct;

[0029] Figure 4 This is a schematic diagram of the structure when the movable plate is in the retracted state.

[0030] Figure 5 This is a side view of the movable plate in its retracted state.

[0031] Figure 6 This is a schematic diagram of the structure when the movable panel is in the unfolded state.

[0032] Figure 7 This is a side view of the movable panel in its unfolded state.

[0033] Figure 8 for Figure 6 Enlarged view of point A in the middle;

[0034] Figure 9 This is a structural diagram of the air duct, the movable plate, and the main motor body;

[0035] Figure 10 This is a structural diagram of the drive assembly and the moving board;

[0036] Figure 11 This is a schematic diagram of the rotating shaft and connecting rod.

[0037] In the diagram: 1. Motor body;

[0038] 2. Air duct; 21. Intake pipe; 22. Connecting pipe; 23. Contraction pipe; 24. Turbofan;

[0039] 3. Connecting mechanism; 31. Air guide block; 32. Support group; 33. Air supply duct; 321. Moving plate; 34. Drive group; 341. Rotating shaft; 342. Connecting rod; 35. Pressure chamber; 36. Tail plate; 361. Secondary chamber. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example: Figures 1-11 As shown, the present invention provides a closed-type air-cooled internal rotor propulsion motor for aircraft, including a motor body 1, an air duct 2 is provided on the outside of the motor body 1, and a connecting mechanism 3 is provided between the air duct 2 and the motor body 1. The air duct 2 is used to transport gas to achieve heat dissipation, and the connecting mechanism 3 is used to connect the motor body 1 and the air duct 2.

[0042] In one specific embodiment of the present invention, the air duct 2 is composed of an air inlet pipe 21, a connecting pipe 22 and a contraction pipe 23. The connecting pipe 22 is connected to the motor body 1 through a connecting mechanism 3. One end of the connecting pipe 22 is provided with the air inlet pipe 21, and the other end of the connecting pipe 22 is provided with the contraction pipe 23. The drive shaft of the motor body 1 extends to the side close to the air inlet pipe 21. A turbo fan 24 is provided on the side of the drive shaft of the motor body 1 located in the air inlet pipe 21. The turbo fan 24 is rotatably connected to the air inlet pipe 21.

[0043] In one specific embodiment of the present invention, a speed sensor is provided inside the turbofan 24.

[0044] In one specific embodiment of the present invention, the connecting mechanism 3 is composed of a plurality of air guide blocks 31 and a support group 32. The air guide blocks 31 are located on the side of the connecting pipe 22 close to the air inlet pipe 21, and the support group 32 is provided on the side of the air guide blocks 31 away from the air inlet pipe 21.

[0045] In one specific embodiment of the present invention, one of the air guide blocks 31 and a support group 32 are combined to form an air guide body, and an air supply channel 33 is provided between two adjacent air guide bodies, and the air supply channel 33 is connected to the air duct 2.

[0046] In one specific embodiment of the present invention, the support group 32 includes two movable plates 321, which are symmetrically arranged. A drive group 34 is provided between the movable plates 321 and the air guide block 31. The movable plates 321 are driven by the drive group 34. The upper end face of the movable plate 321 is slidably connected to the air duct 2, and the lower end face of the movable plate 321 is slidably connected to the motor body 1.

[0047] In one specific embodiment of the present invention, there is a gap between the movable plates 321 in the same group.

[0048] In one specific embodiment of the present invention, the drive group 34 consists of two rotating shafts 341 and several connecting rods 342. The rotating shafts 341 are disposed inside the air guide block 31 and are driven by a micro motor. One end of the connecting rod 342 is connected to the rotating shaft 341, and the other end of the connecting rod 342 is hinged to the moving plate 321.

[0049] In one specific embodiment of the present invention, a pressure chamber 35 is provided in the inner wall of the air duct 2, a hydraulic cylinder is provided in the pressure chamber 35, a push plate is provided at the output end of the hydraulic cylinder, and hydraulic oil is filled between the push plate and the pressure chamber 35. A tail plate 36 is provided on the side of the moving plate 321 away from the air guide block 31, and a push rod is provided on the side of the tail plate 36 near the moving plate 321. The push rod is slidably connected to the tail plate 36, and one end of the push rod is hinged to the moving plate 321. A secondary cavity 361 is provided in the tail plate 36, and the secondary cavity 361 is also filled with hydraulic oil. Several secondary cavities 361 are interconnected through pipes, and the secondary cavities 361 are connected to the pressure chamber 35 through pipes.

[0050] Working principle of the invention:

[0051] While the drive shaft of the motor body 1 drives the propeller to rotate, the drive shaft of the motor body 1 also drives the turbofan 24 to rotate. During the rotation of the turbofan 24, the external gas is introduced to the side close to the intake pipe 21, so that the external gas enters the air duct 2 along the intake pipe 21 and flows through the intake pipe 21, the connecting pipe 22 and the contraction pipe 23 in sequence. Since the diameter of the contraction pipe 23 is reduced, that is, the diameter of the intake pipe 21 and the connecting pipe 22 is larger than the diameter of the contraction pipe 23, the flow time of the external gas in the area of ​​the connecting pipe 22 is longer than the flow time of the external gas in the area of ​​the contraction pipe 23. This allows the external gas to prolong the contact time with the motor body 1, thereby carrying away the heat generated by the motor body 1. When flowing through the contraction pipe 23, the flow rate of the external gas carrying heat is accelerated, thereby dissipating the heat more quickly, thus ensuring the stable operation of the motor body 1.

[0052] During the process of external gas being transported from the intake pipe 21 to the connecting pipe 22, the external gas first encounters the air guide block 31, which diverts the external gas. The external gas flows from the side of the air guide block 31 to the side of the support group 32. Since the air guide block 31 and the support group 32 are connected to the side wall of the motor body 1, the heat generated by the motor body 1 is transferred outward through the support group 32. That is, the support group 32 can serve as a heat sink for the motor body 1, and conduct heat for the motor body 1.

[0053] When the speed of the motor body 1 increases, the heat generated by the motor body 1 during operation will also increase accordingly. As a result, the controller controls the drive group 34 to start, and the controller controls the micro motor to start. The drive shafts of the two micro motors drive the two rotating shafts 341 to rotate. The two rotating shafts 341 rotate in opposite directions, so that the rotating shafts 341 drive the connecting rod 342 to rotate during the rotation. As a result, the connecting rod 342 drives the moving plate 321 to rotate during the rotation. The moving plate 321 moves out of the space between the air guide block 31 and the tail plate 36, so that the moving plate 321 moves to the side closer to the air duct 33.

[0054] While the micro motor drives the moving plate 321 to move closer to the air guide block 31, the controller controls the hydraulic cylinder in the pressure chamber 35 to start. The push rod of the hydraulic cylinder drives the push plate to move. The push plate squeezes the hydraulic oil in the pressure chamber 35, causing the hydraulic oil in the pressure chamber 35 to flow through the pipe to the secondary chamber 361, increasing the amount of hydraulic oil in the secondary chamber 361. This causes the hydraulic oil in the secondary chamber 361 to push the push rod to extend out from the tail plate 36. Then, the push rod and the connecting rod 342 move synchronously, causing the moving plate 321 to move from between the air guide block 31 and the tail plate 36 to the air delivery channel 33. Thus, the space between two adjacent moving plates 321 is connected to the air delivery channel 33.

[0055] This allows both side walls of the movable plate 321 to come into contact with the outside air. The unfolded movable plate 321 not only increases the heat dissipation efficiency of the motor body 1, but also, since the movable plate 321 extends into the air supply channel 33, the air supply channel within the air supply channel 33 becomes smaller. As a result, the flow speed of the outside air through the connecting pipe 22 will increase. With more flow channels, the outside air can pass through the connecting pipe 22 at a faster flow rate, which further improves the heat dissipation efficiency and ensures the stable operation of the motor body 1.

[0056] When the speed of the motor body 1 decreases, the controller controls the drive group 34 to reset, and then the two moving plates 321 are transported to the side away from the air supply channel 33, so that the side wall of the two moving plates 321 opposite to each other is isolated from the air supply channel 33 again, so that the outside air can only be cooled through the original air supply channel 33.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hermetically air-cooled internal rotor propulsion motor for an aircraft, characterized by: The utility model provides an electric machine body (1), the outside of electric machine body (1) is provided with air duct pipe (2), be provided with connecting mechanism (3) between air duct pipe (2) and electric machine body (1), air duct pipe (2) is used for conveying gas to realize heat dissipation, connecting mechanism (3) is used for connecting electric machine body (1) and air duct pipe (2), Air duct pipe (2) is composed of air inlet pipe (21), connecting pipe (22) and contraction pipe (23), connecting pipe (22) is connected with electric machine body (1) through connecting mechanism (3), one end of connecting pipe (22) is provided with air inlet pipe (21), the other end of connecting pipe (22) is provided with contraction pipe (23), Connecting mechanism (3) is composed of several air guide blocks (31) and support groups (32), air guide block (31) is located on the side of connecting pipe (22) close to air inlet pipe (21), and support group (32) is arranged on the side of air guide block (31) away from air inlet pipe (21), One of air guide block (31) and one support group (32) are combined into an air guide body, and a gas conveying channel (33) is arranged between the adjacent two air guide bodies, and the gas conveying channel (33) is communicated with the air duct pipe (2), The support group (32) includes two moving plates (321), and the two moving plates (321) are symmetrically arranged, a driving group (34) is arranged between the moving plate (321) and the air guide block (31), the moving plate (321) is driven by the driving group (34), the upper end surface of the moving plate (321) is slidably connected with the air duct pipe (2), and the lower end surface of the moving plate (321) is slidably connected with the electric machine body (1), The driving group (34) is composed of two rotating shafts (341) and a plurality of connecting rods (342), the rotating shaft (341) is arranged in the air guide block (31), the rotating shaft (341) is driven by a micro motor, one end of the connecting rod (342) is connected with the rotating shaft (341), and the other end of the connecting rod (342) is hingedly connected with the moving plate (321), A pressure cavity (35) is arranged in the inner wall of the air duct pipe (2), a hydraulic cylinder is arranged in the pressure cavity (35), a push plate is arranged at the output end of the hydraulic cylinder, hydraulic oil is filled between the push plate and the pressure cavity (35), a tail plate (36) is arranged on the side of the moving plate (321) away from the air guide block (31), a push rod is arranged on the side of the tail plate (36) close to the moving plate (321), the push rod is slidably connected with the tail plate (36), one end of the push rod is hingedly connected with the moving plate (321), a secondary cavity (361) is arranged in the tail plate (36), and the secondary cavity (361) is also filled with hydraulic oil, a plurality of secondary cavities (361) are communicated with each other through pipelines, and the secondary cavities (361) are communicated with the pressure cavity (35) through pipelines.

2. A hermetic air-cooled internal rotor propulsion motor for an aircraft as defined in claim 1, wherein: The drive shaft of the electric machine body (1) extends to the side close to the air inlet pipe (21), and the drive shaft of the electric machine body (1) is provided with a turbofan (24) on the side of the air inlet pipe (21), and the turbofan (24) is rotatably connected with the air inlet pipe (21).

3. A hermetic air-cooled internal rotor propulsion motor for an aircraft as defined in claim 1, wherein: There is a gap between the moving plates (321) of the same group.

4. A hermetic air-cooled internal rotor propulsion motor for an aircraft as recited in claim 2, characterized by: A rotation speed sensor is arranged in the turbofan (24).

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