EVTOL aircraft air cooling motor mounting structure

Abstract

The utility model discloses an eVTOL aircraft air cooling motor installation structure which comprises a motor base, a motor is installed on the motor base, a wind scooper is sleeved on the outer side of the motor, a skin covers the upper end of the motor base, the upper end of the wind scooper is connected with the skin, heat dissipation fins are arranged on the surface of the motor, and the heat dissipation fins are connected with the wind scooper. A gap of an annular structure is arranged between the wind scooper and the radiating fins. According to the structure, the heat dissipation effect is good, the connecting turned-over edge of the wind scooper is directly turned over to the skin and connected with the skin, no gap exists between the connecting turned-over edge and the skin, heat dissipation airflow can effectively flow into the space between the wind scooper and the motor, the flow speed is increased, heat dissipation is conducted on the motor, and the heat dissipation effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation equipment, and in particular to an air-cooled motor installation structure for an eVTOL aircraft. Background Art

[0002] An eVTOL aircraft is an aircraft that is driven by an electric motor instead of an internal combustion engine. It uses an electric propulsion system instead of an internal combustion engine, which gives it many advantages and unique qualities. When the motor is running, a lot of heat is generated, which needs to be dissipated. Otherwise, the motor will stop due to excessive temperature, and the eVTOL aircraft flying in the air will crash due to loss of power. Commonly used heat dissipation methods are liquid cooling and air cooling. The coolant and system weight of the liquid cooling system are relatively large, which is not suitable for aircraft such as aircraft with high weight requirements. Air cooling is mainly used for heat dissipation. The existing eVTOL aircraft air-cooled motor is installed on the motor base, which is spliced ​​by multiple metal parts. The connection is complicated and because the motor load is complex and the vibration is severe, the motor base structure is thick and heavy. Utility Model Content

[0003] The purpose of the utility model is to provide an eVTOL aircraft air-cooled motor installation structure to solve the problems mentioned in the background technology. To achieve the above purpose, the utility model provides the following technical solutions: an eVTOL aircraft air-cooled motor installation structure, including a motor seat, a motor is installed on the motor seat, an air guide cover is sleeved on the outer side of the motor, a skin is covered on the upper end of the motor seat, the upper end of the air guide cover is connected to the skin, the surface of the motor has heat dissipation fins, and a gap of an annular structure is provided between the air guide cover and the heat dissipation fins.

[0004] Preferably, the air guide cover includes an air guide cover body, a connecting flange is provided at the upper end of the air guide cover body along the circumference, the front and rear sides of the connecting flange are connected to the skin through support nuts, and an avoidance groove is provided at the bottom of the air guide cover body along the circumference.

[0005] Preferably, the motor seat includes an end frame, a sealing frame is installed at the front end of the end frame, longitudinal ribs are connected between the end frame and the sealing frame, a mounting groove is provided on the top of the end frame, a motor mounting hole is opened in the middle of the mounting groove, reinforcing ribs are provided on the circumference of the motor mounting hole, the reinforcing ribs are installed on the mounting groove, and connecting ears are installed along the circumference of the motor mounting hole, and the connecting ears correspond to the position of the avoidance groove.

[0006] Preferably, the bottom of the motor is provided with connection points along the circumference, and the connection points are connected to the connection ears.

[0007] Preferably, the motor base is an integral 3D-printed aluminum alloy part.

[0008] Preferably, the air guide cover is a carbon fiber composite material structural component.

[0009] Preferably, the bottom of the skin is provided with an opening.

[0010] The technical effects and advantages of the utility model: the structure has good heat dissipation effect: the connection flange of the air guide cover is directly turned over the skin and connected to the skin, and there is no gap between the skin, which can effectively make the heat dissipation airflow flow between the air guide cover and the motor, increase the flow rate, dissipate heat for the motor, and have good heat dissipation effect;

[0011] High structural rigidity: The motor seat is an integral 3D printed metal part, and the various parts are not connected by fasteners. The overall rigidity is high, so the motor position deformation is small, which effectively improves the efficiency of controlling the aircraft attitude;

[0012] High safety: The motor base is an integral structure without any separation area connected to each other. It is not easy to produce cracks when subjected to motor fatigue. The connection area between the air guide cover and the skin is large, with good support stiffness, making it difficult to damage the air guide cover, and it is highly safe.

[0013] Good maintainability: The air guide cover is connected to the skin through the support nut. The air guide cover can be disassembled from the outside of the machine body to maintain the motor, which is easy to maintain;

[0014] Light weight: The 3D printed motor base has multiple spatial structures, high efficiency, no connections between the various parts, a high degree of integration, and a light structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an axonometric drawing of the utility model;

[0016] Figure 2 It is an exploded view of the utility model;

[0017] Figure 3 This is an axonometric view of the air guide cover of the utility model;

[0018] Figure 4 This is an axonometric view of the motor base of the utility model;

[0019] Figure 5 It is a cross-sectional view of the connection between the air guide cover and the skin of the utility model;

[0020] Figure 6 This is an axonometric diagram of the utility model on eVTOL.

[0021] In the figure, 1. air-cooled motor installation structure; 11. air guide cover; 111. connecting flange; 112. air guide cover body; 113. avoidance groove; 12. skin; 13. motor seat; 131. end frame; 132. sealing frame; 133. longitudinal ribs; 134. connecting ears; 135. reinforcing ribs; 136. installation grooves; 137. motor installation holes; 14. motor; 141. cooling fins; 142. connection points; 15. support plate nuts; 2. eVTOL aircraft. DETAILED DESCRIPTION

[0022] In order to make the technical means for realizing the utility model, creative features, objectives and effects easy to understand, the utility model is further explained below in conjunction with specific diagrams. In the description of the utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection or a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two components.

[0023] Example

[0024] like Figure 6 As shown, the air-cooled motor mounting structure 1 is arranged at the lift unit position of the eVTOL aircraft 2. As the main component for the vertical take-off and landing of the eVTOL, it bears the tension, vibration, torque, bending moment, etc. generated by the propeller driven by the motor. Therefore, it is necessary to ensure the strength and safety of the connection structure to prevent a crash.

[0025] like Figure 1 and Figure 2 As shown, the air-cooled motor installation structure 1 includes an air guide cover 11, a skin 12, a motor seat 13, and a motor 14. The motor 14 is installed on the motor seat 13, and the air guide cover 11 is sleeved on the outside of the motor 14. The upper end of the motor seat 13 is covered with a skin 12, and the upper end of the air guide cover 11 is connected to the skin 12; the surface of the motor 14 is provided with a heat dissipation fin 141, and the bottom is provided with a connection point 142 along the circumference. The rotation of the motor 14 drives the propeller to generate a pulling force, and the downwash airflow generated by the propeller blows through the heat dissipation fin 141 of the motor 14 to dissipate the heat of the motor 14. In order to improve the heat dissipation efficiency, the wind speed on the fin surface needs to be as large as possible. The air guide cover 11 has the function of guiding flow, and a ring structure with a small gap is maintained between it and the heat dissipation fin 141 of the motor 14, and the upper part is open to introduce airflow. The skin 12 is the outer surface of the eVTOL aircraft 2, maintaining the outer shape of the eVTOL aircraft 2 while transmitting part of the load. The bottom is opened to allow the airflow transmitted by the air guide cover 11 and the motor seat 13 to be discharged to the outside to complete the heat exchange with the motor 14. The motor 1 is installed inside the motor seat 13, which is similar to a cage structure. The motor seat 13 bears various complex loads of the motor 14, such as tension, bending moment, torque, vibration, etc.

[0026] like Figure 3 and Figure 5 As shown, the air scoop 11 includes an air scoop body 112, and a connecting flange 111 is provided along the circumference of the upper end of the air scoop body 112. The connecting flange 111 is connected to the skin 12 by a support nut 15. Considering the installation space of the fastener, the support nut 15 is installed at the front and rear ends and other positions with smaller curvature. The left and right ends cannot be provided with the support nut 15 due to the large curvature of the curved surface. Therefore, the connecting flange 111 is shortened at the left and right ends to save part of the structural weight. A small gap is maintained between the air scoop body 112 and the motor 14. Considering the tolerance and structural deformation requirements, interference with the motor 14 is prevented. In this example, it is 5mm. The air scoop 11 is made of carbon fiber composite material to further reduce the structural weight and can form a complex curved surface structure. The bottom of the air scoop body 112 is provided with an avoidance groove 113 along the circumference. The avoidance groove 113 can make the bottom of the air scoop body 112 closer to the motor seat 13, so as to facilitate the airflow to enter the air scoop 11.

[0027] like Figure 4 As shown, the motor seat 13 is an integral 3D printed aluminum alloy part, including an end frame 131, a sealing frame 132, longitudinal ribs 133, a connecting ear piece 132, and a reinforcing rib 135. The sealing frame 132 is installed at the front end of the end frame 131, and the longitudinal rib 133 is connected between the end frame 131 and the sealing frame 132. A mounting groove 136 is provided at the top of the end frame 131, and a motor mounting hole 137 is opened in the middle of the mounting groove 136. The circumference of the motor mounting hole 137 is provided with a reinforcing rib 135, and the reinforcing rib 135 is installed on the mounting groove 136. The motor mounting hole 137 is provided with a reinforcing rib 135 along the circumference. The connecting lug 132 corresponds to the position of the avoidance groove 113; the end frame 131 and the sealing frame 132 provide circumferential support, the longitudinal ribs 133 combine the end frame 131 and the sealing frame 132 to form a three-dimensional structure, the reinforcing ribs 135 strengthen the structure to improve the rigidity, the connecting lug 132 is connected to the connection point 142 of the motor 14, and the inner circle of the connecting lug 132 is a hollow annular structure, so that the airflow from the air guide cover 11 passes through, flows to the lower part, and finally flows to the outside of the structure through the opening at the bottom of the skin 12. The connecting lug 132 is a partially thickened structure, which improves the rigidity of the connection point 142 and reduces the stress level at the connection to ensure the safety of the structure.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An eVTOL aircraft air-cooled motor mounting structure, comprising a motor seat, characterized in that: A motor is mounted on the motor seat, an air guide cover is provided on the outside of the motor, a skin is provided on the upper end of the motor seat, the upper end of the air guide cover is connected to the skin, cooling fins are provided on the surface of the motor, and a gap of an annular structure is provided between the air guide cover and the cooling fins.

2. The air-cooled motor mounting structure for an eVTOL aircraft according to claim 1, characterized in that: The air guide cover comprises an air guide cover body, the upper end of the air guide cover body is provided with a connecting flange along the circumference, the front and rear sides of the connecting flange are connected to the skin through a support nut, and the bottom of the air guide cover body is provided with an avoidance groove along the circumference.

3. The air-cooled motor mounting structure for an eVTOL aircraft according to claim 2, characterized in that: The motor seat includes an end frame, a sealing frame is installed at the front end of the end frame, longitudinal ribs are connected between the end frame and the sealing frame, a mounting groove is provided at the top of the end frame, a motor mounting hole is opened in the middle of the mounting groove, reinforcing ribs are provided on the circumference of the motor mounting hole, the reinforcing ribs are installed on the mounting groove, and connecting ears are installed along the circumference of the motor mounting hole, and the connecting ears correspond to the position of the avoidance groove.

4. The air-cooled motor mounting structure for an eVTOL aircraft according to claim 3, characterized in that: The bottom of the motor is provided with connection points along the circumference, and the connection points are connected to the connection ears.

5. The air-cooled motor mounting structure for an eVTOL aircraft according to claim 3, characterized in that: The motor base is an integral 3D-printed aluminum alloy part.

6. The air-cooled motor mounting structure for an eVTOL aircraft according to claim 1, characterized in that: The air guide cover is a carbon fiber composite material structural component.

7. The air-cooled motor mounting structure for an eVTOL aircraft according to claim 1, characterized in that: The bottom of the skin is provided with an opening.

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