EVTOL power test bench

Abstract

The utility model discloses an eVTOL power test bench, which comprises a cantilever and a support frame, the cantilever is connected to one side of the support frame, the bottom of the support frame is provided with a shock absorber, the cantilever comprises a motor seat assembly, the motor seat assembly is arranged at one end of a main beam through a fastener, the other end of the main beam is provided with a connecting seat through a fastener, and the connecting seat is connected with the support frame. The connecting base is connected with a supporting frame, the bottom of the main beam is connected with one end of a pull rod, the other end of the pull rod is connected with the supporting frame, and an electric speed controller support and a water cooling support are installed on the side edge of the main beam. The rack is good in verification effect: the motor, the propeller, the electronic speed controller, the liquid storage tank and related connection pipelines are all designed according to the actual relative positions of the eVTOL aircraft, the mutual influence of different components on the eVTOL aircraft, such as the influence of propeller airflow on the electronic speed controller, the liquid storage tank and the related connection pipelines, is reliably checked, and the verification effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation equipment, and in particular to an eVTOL power test bench. Background Art

[0002] The development of eVTOL (Electric Vertical Takeoff and Landing) electric vertical takeoff and landing aircraft has attracted widespread attention from aerospace companies, the automotive industry, the transportation industry, the government, the military, and academia. The potential future applications of eVTOL involve a variety of scenarios such as urban passenger transport, regional passenger transport, freight, personal aircraft, and emergency medical services. The use of electric propulsion systems instead of internal combustion engine power has gained many advantages and unique qualities. The most prominent advantages are energy saving and environmental protection, high efficiency and low energy consumption, while achieving near-zero emissions, very low noise and vibration levels, and good ride comfort. It is a truly environmentally friendly aircraft. In addition, it is also safe and reliable (no explosion and fuel leakage), simple structure, easy operation and use, good maintainability / low cost, and good economy. There are also many advantages in design: the overall layout is flexible, the optimal layout and unconventional / innovative layout can be adopted; aircraft with extraordinary performance can be designed to meet special purpose needs, etc.

[0003] eVTOL is mainly powered by an electric power system, which mainly includes motors, electric regulators, propellers, cooling systems, etc. Since the electric power system is a relatively new aviation power technology in recent years, the reliability of the electric power system needs to be tested before it is installed on the eVTOL aircraft to meet the safety requirements of the eVTOL aircraft. The existing ground verification technology mainly uses ground test benches to test the power system to ensure the reliability and durability of the power system. Problems found during the test can be improved and perfected on the ground to avoid failure problems after the power system is installed and ensure flight safety. However, the existing test bench method verifies the reliability and durability of the electric power system of the eVTOL aircraft. Utility Model Content

[0004] The purpose of the utility model is to provide an eVTOL power test bench to solve the problems mentioned in the background technology. To achieve the above purpose, the utility model provides the following technical solutions: an eVTOL power test bench, including a cantilever and a support frame, the cantilever is connected to one side of the support frame, a shock absorber is installed at the bottom of the support frame, the cantilever includes a motor seat assembly, the motor seat assembly is installed on one end of the main beam through fasteners, the other end of the main beam is installed with a connecting seat through fasteners, the connecting seat is connected to the support frame, the bottom of the main beam is connected to one end of a pull rod, the other end of the pull rod is connected to the support frame, and the side of the main beam is installed with an electric adjustment bracket and a water cooling bracket.

[0005] Preferably, the support frame comprises a frame body, the bottom of the frame body is connected to a base plate, the shock absorber is installed at the bottom of the base plate, and a reinforcing rod is connected between the frame body and the base plate.

[0006] Preferably, the motor seat assembly includes a base, an L-shaped bracket and a C-shaped bracket are installed at the bottom of the base, and the base is installed on one end of the main beam through the L-shaped bracket and the C-shaped bracket and fasteners.

[0007] Preferably, the base comprises a base body, the base body is provided with a boss and a wire passing hole, and the wire passing hole is located on one side of the boss.

[0008] Preferably, the pull rod comprises a profile beam and a flat plate, and two ends of the profile beam are connected to the main beam and the support frame through the flat plate.

[0009] Preferably, a through hole is opened on the main beam, and four connecting seats are provided and respectively installed on the four sides of the main beam.

[0010] Preferably, a through hole is formed on the C-shaped bracket.

[0011] Technical effects and advantages of the utility model: The test bench has good verification effect: the motor, propeller, electric regulator, liquid storage tank and related connecting pipelines are designed according to the actual relative positions of the eVTOL aircraft, and the mutual influence of different components on the eVTOL aircraft can be reliably evaluated, such as the influence of propeller airflow on the electric regulator, liquid storage tank and related connecting pipelines, and the verification effect is good;

[0012] High safety: The cantilever is designed with a main beam and a tie rod. When the main beam and the tie rod are intact, they can meet the 3-fold safety factor requirement. Each component can independently withstand the propeller pull after another component is damaged, thus avoiding accidents during the test.

[0013] Easy maintenance: All connection areas are visually inspectable. When cracks are generated by propeller vibration, they can be easily inspected. At the same time, installation inspection ports are opened on the main beam to facilitate the inspection of equipment, pipeline installation and fasteners.

[0014] More stringent assessment: The cantilever places the motor and propeller horizontally, close to the ground. During the test, the propeller has a better ground effect and generates greater pulling force. Compared with the actual eVTOL aircraft, the load is greater, the power system is more fully verified, and the assessment is more stringent;

[0015] Low cost: Except for the base which is made of aluminum alloy machined parts, other parts of the power test bench are made of standard metal profiles and metal plates welded and bolted together, which is low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is an axonometric drawing of the utility model;

[0017] Figure 2 It is an exploded view of the utility model;

[0018] Figure 3 It is an exploded view of the cantilever of the utility model;

[0019] Figure 4 This is an exploded view of the motor base assembly of the utility model;

[0020] Figure 5 It is an axonometric view of the base and the motor of the utility model at the terminal position;

[0021] Figure 6 It is an axonometric diagram of the utility model in use state;

[0022] Figure 7 It is an exploded view of the utility model in use state.

[0023] In the figure, 1. power test bench; 11. cantilever; 111. motor seat assembly; 1111. base; 11111. boss; 11112. wire hole; 11113. base body; 1112. L-shaped bracket; 1113. C-shaped bracket; 112. pull rod; 1121. flat plate; 1122. profile beam; 113. main beam; 114. electric adjustment bracket; 115. water cooling bracket; 116. connecting seat; 117. fastener; 12. support frame; 13. shock absorber; 121. frame; 122. bottom plate; 123. reinforcement rod; 2. motor; 21. terminal; 3. propeller; 4. electric adjustment; 5. liquid storage tank. DETAILED DESCRIPTION

[0024] 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.

[0025] Example

[0026] like Figure 6 and Figure 7As shown, during the power system test, the motor 2, propeller 3, electric regulator 4, liquid storage tank 5, etc. in the power system are installed on the power test bench 1 in accordance with the actual aircraft layout, and their corresponding relationship is maintained to assess the mutual influence between them. The electric regulator 4 controls the rotation of the motor 2 and then drives the propeller 3 to rotate to generate pulling force. The coolant in the liquid storage tank 5 dissipates heat from the motor 2 and the electric regulator 4 through the pipeline to ensure the use requirements of the motor 2 and the electric regulator 4.

[0027] like Figure 1 and Figure 2 As shown, the power test bench 1 includes a cantilever 11 and a support frame 12, and the cantilever 11 is connected to one side of the support frame 12; the support frame 12 is welded by steel profiles and steel plates, and includes a frame body 121, the bottom of the frame body 121 is connected to a bottom plate 122, and a reinforcing rod 123 is connected between the frame body 121 and the bottom plate 122, and the reinforcing rod 123 is used to strengthen the connection strength between the two. The lower part of the bottom plate 122 is connected to the ground by a plurality of shock absorbers 13, and the number of shock absorbers in this example is 6. When testing, the vibration of the propeller 3 can be absorbed by the shock absorber 13 to reduce the shaking of the power test bench 1. At the same time, the modulus and density of steel are greater than those of aluminum alloy, and the use of steel material can effectively improve the rigidity of the support frame 12. The cantilever 11 is made of aluminum alloy material, so it is light in weight and convenient for installation, disassembly, and debugging inside the test room.

[0028] like Figure 3As shown, the cantilever 11 includes a motor seat assembly 111, a tie rod 112, a main beam 113, an electric adjustment bracket 114, a water cooling bracket 115, a connecting seat 116, and a fastener 117. The motor seat assembly 111 is installed at one end of the main beam 113 through the fastener 117. The motor seat assembly 111 connects the motor 2 to the cantilever 11 to achieve the installation of the motor 2. The tie rod 112 is welded by the flat plates 1121 at both ends and the profile beam 1122 in the middle. The flat plates 1121 at both ends are respectively connected to the main beam 113 and the support frame 12. The tie rod 112 can be made of steel, aluminum alloy, or titanium alloy. Preferably, aluminum alloy is used. The main beam 113 is processed with a standard aluminum alloy profile. In this example, it is 200*200mm, 10mm thick 6061 aluminum alloy, and the heat treatment state is T6. Through holes for process operation and pipeline routing are opened on the main beam 113 to facilitate installation, disassembly operations and system routing. The electric adjustment bracket 114 and the water cooling bracket 115 are installed on the side of the main beam 113. The electric adjustment bracket 114 supports the electric adjustment 4. The electric adjustment bracket 114 is made of the same profile as the main beam 113, and a corner is cut to save the cost of raw materials and processing costs. The water cooling bracket 115 uses the profile of the main beam 113, cuts off a surface, forms a U-shaped part, and then uses aluminum plates to weld at both ends of the U-shaped part, and places the liquid storage tank 5. The liquid storage tank 5 is surrounded by cushioning materials, and the upper part is tied to the water cooling bracket 115 with a strap. The connecting seat 116 connects the main beam 113 to the support frame 12. The connecting seat 116 also uses the profile of the main beam 113, cuts into an L-shaped part, and welds triangular flat plates at both ends of the L-shaped part to form a corner box. There are 4 connecting seats 116 in total, which are connected to the four faces of the main beam 113 to install the main beam 113 on the support frame 12. The fasteners assemble the individual parts into a whole. In this example, the fastener 117 is composed of a bolt, a self-locking nut and a gasket. In this way, the disassembly requirements can be met through threaded cooperation. At the same time, the self-locking nut has a locking effect to prevent the connector from loosening when the propeller vibrates, thereby ensuring the reliability of the connection.

[0029] like Figure 4As shown, the motor seat assembly 111 includes a base 1111, an L-shaped bracket 1112, and a C-shaped bracket 1113. The base 1111 is connected to the motor 2, and bears the tension and vibration of the motor 2 driving the propeller 3 to rotate. It needs to have high fatigue performance, so it needs to use materials with relatively good fatigue resistance and is manufactured by mechanical processing. The material can be steel, aluminum alloy, and titanium alloy. The preferred material is aluminum alloy 2024, and the heat treatment state is T351. The C-shaped bracket 1113 uses an aluminum alloy C profile with a standard cross-section, and is connected to the base 1111 and the main beam 113 respectively by fasteners 117. A through hole is opened on the C-shaped bracket 1113. The through hole on the inner C-shaped bracket 1113 is for the power harness to pass through, and the through hole on the outer C-shaped bracket 1113 is used as a tool space. When the motor 2 and the base 1111 are installed, the tool is operated through this hole. The L-shaped bracket 1112 uses the profile of the main beam 113 and cuts out an angle to form an L shape, and the two sides are respectively connected to the main beam 113 and the base 1111 using fasteners 117.

[0030] like Figure 5 As shown, the base 1111 includes a base body 11113, and the base body 11113 is provided with a boss 11111 and a wire hole 11112. When the base 1111 is matched with the motor 2, the boss 11111 is higher than the base body 11113, and the motor 2 is raised to a certain height. The height space is sufficient for the motor terminal 21 to be installed and the electrical clearance of the terminal 21 is satisfied. The right below of the terminal 21 corresponds to the wire hole 11112 of the base 1111, so that the power harness can be connected to the upper terminal 21 through the wire hole 11112 to supply power to the motor 2. The terminal 21 of the motor is the connection point for powering the motor 2, ensuring the necessary power input for the operation of the motor 2.

[0031] 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 power test bench, comprising a cantilever and a support frame, characterized in that: The cantilever is connected to one side of the support frame, a shock absorber is installed at the bottom of the support frame, the cantilever includes a motor seat assembly, the motor seat assembly is installed on one end of the main beam through fasteners, a connecting seat is installed on the other end of the main beam through fasteners, the connecting seat is connected to the support frame, one end of a pull rod is connected to the bottom of the main beam, the other end of the pull rod is connected to the support frame, and an electric adjustment bracket and a water cooling bracket are installed on the side of the main beam.

2. The eVTOL power test bench according to claim 1, characterized in that: The support frame comprises a frame body, the bottom of the frame body is connected to a base plate, the shock absorber is installed at the bottom of the base plate, and a reinforcing rod is connected between the frame body and the base plate.

3. The eVTOL power test bench according to claim 1, characterized in that: The motor seat assembly includes a base, an L-shaped bracket and a C-shaped bracket are installed at the bottom of the base, and the base is installed on one end of the main beam through the L-shaped bracket and the C-shaped bracket and fasteners.

4. The eVTOL power test bench according to claim 3, characterized in that: The base comprises a base body, on which a boss and a wire-passing hole are arranged, and the wire-passing hole is located at one side of the boss.

5. The eVTOL power test bench according to claim 1, characterized in that: The pull rod comprises a profile beam and a flat plate, and two ends of the profile beam are connected to the main beam and the support frame through the flat plate.

6. The eVTOL power test bench according to claim 1, characterized in that: The main beam is provided with a through hole, and four connecting seats are provided and respectively installed on the four sides of the main beam.

7. The eVTOL power test bench according to claim 3, characterized in that: The C-shaped bracket is provided with a through hole.

Images