Eddy current braking device of large inertia wheel test bench

Abstract

The utility model belongs to the technical field of mechanical equipment control, and particularly relates to an eddy current braking device of a large inertia wheel test bench. An eddy current brake device of a large inertia wheel test bench comprises an inertia wheel mechanism, a clutch and an eddy current brake, the inertia wheel mechanism comprises an inertia wheel bearing seat and an inertia wheel dragging motor, an inertia wheel is arranged on the inertia wheel bearing seat, one end of the clutch is connected with an output shaft of the inertia wheel dragging motor, and the other end of the clutch is connected with an output shaft of the inertia wheel dragging motor. The eddy current brake is connected with an eddy current brake excitation controller, a shell of the eddy current brake is of a double-layer structure, and a circulating water outlet and a circulating water inlet are formed in the shell of the eddy current brake. Heat generated by armature current in the brake is taken away through circulating water, so that the eddy current brake continuously outputs braking torque, large-energy braking is achieved, and potential safety hazards caused by long-time sliding due to mechanical friction and wind resistance are avoided.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical equipment control technology, and specifically relates to an eddy current braking device for a large inertia wheel test bench. Background Technology

[0002] Aircraft wheel brake test benches, aircraft landing gear shimmy test benches, and other equipment utilize large inertia wheels to simulate the rolling motion of aircraft wheels during taxiing, takeoff, and landing in hangars and runways. During testing, an external hydraulic loading device presses the wheel assembly and the outer edge of the large inertia wheel together to simulate the vertical load of the aircraft wheel on the ground; simultaneously, the inertia wheel's drive motor rotates the wheel, causing the aircraft wheel and the outer edge of the inertia wheel to roll against each other. The linear velocity of the outer surface of the inertia wheel is the simulated taxiing speed of the wheel. Because the diameter and width of the large inertia wheel must meet the testing requirements of various aircraft wheels, its moment of inertia is typically very large.

[0003] During related experiments, large inertia wheels typically rotate at high speeds and have a relatively large moment of inertia, according to E=0.5*J*ω. 2 Therefore, it possesses enormous rotational kinetic energy during operation. Under normal circumstances, the starting, acceleration, deceleration, constant speed operation, and braking of the large inertia wheel are all controlled by the inertia wheel drive motor. In certain extreme situations (such as power outages or drive motor control system failures), emergency braking of the large inertia wheel is required. The existing braking solution is to allow the large inertia wheel to roll freely, dissipating its kinetic energy through wind resistance and mechanical friction. This results in a low deceleration rate and a long rolling time, posing numerous safety hazards. Another solution is to brake the inertia wheel using a disc brake mounted coaxially with it. However, because the rotational kinetic energy of the inertia wheel is too large, continuous braking causes the brake disc to overheat, leading to a decrease in braking torque. The high-temperature brake disc transfers heat to the main drive shaft, damaging couplings, bearings, and other equipment. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide an eddy current braking device for a large inertia wheel test bench. This device connects the eddy current brake to the inertia wheel mechanism via a clutch, enabling the connection and disconnection of the eddy current brake and the inertia wheel mechanism. This avoids the impact of the brake on the normal operation of the test bench during non-braking conditions. By circulating water, the heat generated by the armature current inside the brake is carried away, thereby enabling the eddy current brake to continuously output braking torque and achieve high-energy braking. This avoids the safety hazards caused by prolonged slippage due to mechanical friction and wind resistance, as well as the damage to mechanical transmission components caused by the significant temperature rise resulting from friction braking with disc brakes.

[0005] The technical solution of this utility model is as follows: a large inertia wheel test bench eddy current braking device, including an inertia wheel mechanism, a clutch, and an eddy current brake. The inertia wheel mechanism includes an inertia wheel bearing seat and an inertia wheel drive motor. An inertia wheel is provided on the inertia wheel bearing seat. The output shaft of the inertia wheel drive motor is connected to the inertia wheel. One end of the clutch is connected to the output shaft of the inertia wheel drive motor, and the other end is connected to the input shaft of the eddy current brake. The eddy current brake is connected to an eddy current brake excitation controller. The outer shell of the eddy current brake has a double-layer structure, and the outer shell of the eddy current brake is provided with a circulating water outlet and a circulating water inlet.

[0006] A torque sensor is installed on the rotating shaft of the inertia wheel-driven motor.

[0007] The circulating water outlet is located on the upper part of the outer side of the eddy current brake, and the circulating water inlet is located on the bottom part of the outer side of the eddy current brake.

[0008] The technical advantages of this invention are as follows: 1. This invention connects the eddy current brake to the inertia wheel mechanism via a clutch, allowing for connection and disconnection between the eddy current brake and the inertia wheel mechanism, thus avoiding the impact of the brake on the normal operation of the test bench during non-braking conditions; 2. During the braking process, this invention converts the kinetic energy of the inertia wheel into heat, which is then carried away by circulating water. This stable braking process can be sustained for a long time, avoiding the phenomenon of heat accumulation causing localized overheating and serious equipment damage in other braking schemes; if necessary, the braking torque can be adjusted by controlling the excitation current of the eddy current brake, thereby controlling the deceleration rate of the inertia wheel during braking and avoiding the mechanical impact of sudden resistance on the inertia wheel mechanism or other requirements.

[0009] The following will provide further explanation in conjunction with the accompanying drawings. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of an eddy current braking device for a large inertia wheel test bench according to this utility model.

[0011] Reference numerals in the attached diagram: 1-Inertia wheel bearing housing; 2-Inertia wheel; 3-Torque sensor; 4-Inertia wheel drive motor; 5-Clutch; 6-Eddy current brake; 7-Circulating water outlet; 8-Circulating water inlet; 9-Eddy current brake excitation controller. Detailed Implementation Example 1

[0012] like Figure 1As shown, a large inertia wheel test bench eddy current braking device includes an inertia wheel mechanism, a clutch 5, and an eddy current brake 6. The inertia wheel mechanism includes an inertia wheel bearing seat 1 and an inertia wheel drive motor 4. An inertia wheel 2 is mounted on the inertia wheel bearing seat 1. The output shaft of the inertia wheel drive motor 4 is connected to the inertia wheel 2. One end of the clutch 5 is connected to the output shaft of the inertia wheel drive motor 4, and the other end is connected to the input shaft of the eddy current brake 6. The eddy current brake 6 is connected to an eddy current brake excitation controller 9. The outer shell of the eddy current brake 6 has a double-layer structure, and the outer shell of the eddy current brake 6 is provided with a circulating water outlet 7 and a circulating water inlet 8.

[0013] In this invention, during normal operation of the inertia wheel, the inertia wheel 2 is driven by the inertia wheel drive motor 4 to complete the normal test process requirements. At this time, the clutch 5 is in the disengaged state, the eddy current brake excitation controller 9 is de-energized, and the eddy current brake 6 is de-energized. When the inertia wheel 2 needs emergency braking, the clutch 5 is first closed, connecting the eddy current brake 6 to the inertia wheel mechanism. The eddy current brake 6 and the inertia wheel 2 operate synchronously. Then, the circulating cooling water is turned on, and the eddy current brake excitation controller 9 applies excitation current to the eddy current brake, simultaneously generating braking torque. When the eddy current brake 6 rotates with the inertia wheel system and outputs braking torque, the rotor armature circuit of the eddy current brake 6 generates current and consumes heat in the armature circuit. The generated braking heat is carried away by the circulating water. Example 2

[0014] Based on Embodiment 1, in this embodiment, preferably, a torque sensor 3 is provided on the rotating shaft of the inertia wheel drive motor 4.

[0015] The inertia wheel drive motor 4 of this invention is equipped with a torque sensor 3 on its rotating shaft, which facilitates the measurement of the operating torque of the inertia wheel mechanism. Example 3

[0016] Based on Embodiment 1 or Embodiment 2, in this embodiment, preferably, the circulating water outlet 7 is located on the upper part of the outer side of the eddy current brake 6, and the circulating water inlet 8 is located on the bottom part of the outer side of the eddy current brake 6.

[0017] The circulating water outlet 7 of this invention is located on the upper part of the outer side of the eddy current brake 6, and the circulating water inlet 8 is located at the bottom of the outer side of the eddy current brake 6. Cooling water enters from the bottom of the outer side of the eddy current brake 6 and exits from the top, which can better remove heat.

[0018] An eddy current braking device for a large inertia wheel test bench is used as follows: when the inertia wheel is running normally, the inertia wheel 2 is driven by the inertia wheel drive motor 4 to complete the normal test process requirements. At this time, the clutch 5 is disengaged, the eddy current brake excitation controller 9 is de-energized, and the eddy current brake 6 is in a de-energized state.

[0019] When the inertia wheel 2 needs emergency braking, firstly, the clutch 5 is closed, connecting the eddy current brake 6 to the inertia wheel mechanism. The eddy current brake 6 and the inertia wheel 2 operate synchronously. Then, the circulating cooling water is turned on, and the excitation current is applied to the eddy current brake 6 through the eddy current brake excitation controller 9, which simultaneously generates braking torque. When the eddy current brake 6 rotates with the inertia wheel mechanism and outputs braking torque, the rotor armature circuit of the eddy current brake 6 generates current and consumes heat in the armature circuit. The heat generated by braking is carried away by the circulating water.

[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. An eddy current braking device for a large inertia wheel test bench, characterized in that: The device includes an inertia wheel mechanism, a clutch (5), and an eddy current brake (6). The inertia wheel mechanism includes an inertia wheel bearing seat (1) and an inertia wheel drive motor (4). An inertia wheel (2) is provided on the inertia wheel bearing seat (1). The output shaft of the inertia wheel drive motor (4) is connected to the inertia wheel (2). One end of the clutch (5) is connected to the output shaft of the inertia wheel drive motor (4), and the other end is connected to the input shaft of the eddy current brake (6). The eddy current brake (6) is connected to an eddy current brake excitation controller (9). The outer shell of the eddy current brake (6) has a double-layer structure. The outer shell of the eddy current brake (6) is provided with a circulating water outlet (7) and a circulating water inlet (8).

2. The eddy current braking device for a large inertia wheel test bench according to claim 1, characterized in that: A torque sensor (3) is provided on the rotating shaft of the inertia wheel drive motor (4).

3. The eddy current braking device for a large inertia wheel test bench according to claim 1, characterized in that: The circulating water outlet (7) is located on the upper part of the outer side of the eddy current brake (6), and the circulating water inlet (8) is located on the bottom part of the outer side of the eddy current brake (6).

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