CN106741877A - A kind of electro-hydraulic ground taxi of multi-wheeled bogie promote with from energy regenerative brake combined device - Google Patents

Abstract

The invention provides a combination device of multi-wheel electro-hydraulic propulsion and self-feeding energy brake, which is installed on each of a plurality of aircraft wheels for driving or braking the wheels. The combination device of electro-hydraulic propulsion and self-feeding brake includes: electro-hydraulic propulsion subsystem, including motor-pump energy pack and wheel drive module, used for when the aircraft taxis to the designated place at normal speed on the ground under the pilot's operation, The motor-pump energy package converts the electric energy provided by the aircraft power system into hydraulic energy, which is provided to the wheel drive module to drive the wheel; After landing, the kinetic energy of the high-speed rotating wheels is converted into hydraulic energy to brake said wheels.

Description

A multi-wheel landing gear electro-hydraulic ground taxiing propulsion and self-feeding brake combination device

technical field

The invention relates to the field of aircraft control, in particular to an electro-hydraulic propulsion and self-feeding brake combination device for multiple aircraft wheels.

Background technique

The aircraft wheel is an important airborne equipment of the aircraft, which plays a vital role in the normal take-off and landing of the aircraft. For aircraft wheels, the two main issues are aircraft braking and aircraft ground drag, both of which involve the energy management of the aircraft.

The energy of the aircraft itself is limited and very valuable. A large amount of kinetic energy will be dissipated during the landing process, and this part of energy is usually dissipated in the form of heat through the aircraft brake device.

In addition, when the aircraft is driving on the ground, it is mostly dragged by a ground aircraft tractor, or driven forward or backward by the aircraft's own engine. On the one hand, it will waste aircraft fuel and pollute the environment; , is not easy to manage.

Contents of the invention

In view of the above problems, the present invention provides a multi-wheel electro-hydraulic propulsion and self-feeding brake combination device, which is proposed based on the new concept of "multi-electric aircraft", and uses the aircraft power system as an energy source to replace the original complex and heavy hydraulic system ; and recover part of the aircraft kinetic energy to supply energy for the aircraft brake actuator, improve the structure and reliability of the brake system, and thus combine the aircraft brake and the aircraft ground driving, which can greatly improve the function of the aircraft landing gear and improve the performance of the aircraft.

According to one aspect of the present invention, the multi-wheel electro-hydraulic propulsion and self-feeding brake combination device is installed on each of the multiple aircraft wheels for driving or braking the wheels. The combined device of multi-wheel electro-hydraulic propulsion and self-feeding brake includes:

The electro-hydraulic propulsion subsystem, including the motor-pump energy pack and the wheel drive module, is used for when the aircraft taxis to the designated place at a normal speed on the ground under the pilot's operation, and the motor-pump energy pack provides the power system of the aircraft the electrical energy converted into hydraulic energy to be provided to the wheel drive module for driving the wheel; and

The self-feeding braking subsystem is used to convert the kinetic energy of the high-speed rotating wheel into hydraulic energy after the aircraft lands, so as to brake the wheel.

According to an embodiment, the motor-pump energy pack includes:

Variable speed motor for driving the hydraulic pump;

a hydraulic pump, connected to the variable speed motor, for outputting high-pressure oil; and

The electromagnetic reversing valve is connected to the hydraulic pump via a one-way valve, and is used for connecting the high-pressure oil to the wheel drive module.

According to an embodiment, the wheel drive module includes:

an accumulator, connected in parallel with the electromagnetic reversing valve, for storing the hydraulic energy of the high-pressure oil;

The hydraulic motor is connected to the machine wheel via a reducer and a clutch, and is used to output the pressure energy of the high-pressure oil as torque to drive the machine wheel.

According to an embodiment, the motor-pump energy package includes a first safety valve connected in parallel with the hydraulic pump via the one-way valve, for stabilizing the outlet pressure of the hydraulic pump and preventing oil from flowing backward; and the machine The wheel drive module includes a second safety valve connected in parallel with the hydraulic motor, which is used to maintain the outlet pressure of the hydraulic motor and the accumulator. When the pressure is too high, the oil inlet and the oil return port are connected to release excess pressure. pressure.

According to an embodiment, wherein the rotational speeds of the variable speed motor and the hydraulic motor are controlled by an on-board controller, and the port position of the electromagnetic reversing valve is controlled by an on-board controller to change the steering direction of the hydraulic motor, The wheels are thereby driven forward or reverse.

According to an embodiment, the self-feeding braking subsystem includes:

a hydraulic motor, connected to the wheel via a reducer and a clutch, for converting the kinetic energy of the wheel rotating at high speed into hydraulic energy to output high-pressure oil; and

A switch valve, connected between the hydraulic motor and the brake actuator, is used to disconnect the connection between the hydraulic motor and the brake actuator when the aircraft is taxiing on the ground under the pilot's operation, and After landing and landing, the connection between the hydraulic motor and the brake actuator is connected to brake the wheels.

According to an embodiment, the self-feedback braking subsystem further includes:

an accumulator for assisting said wheel braking with stored hydraulic energy; and

The safety valve is connected in parallel with the hydraulic motor and is used to maintain the pressure difference between the inlet and outlet of the hydraulic motor.

According to an embodiment, the rotational speed of the hydraulic motor is controlled by the onboard controller, and the port position of the switch valve is controlled by the onboard controller to switch on or off the connection between the hydraulic motor and the brake actuator. connection between.

According to an embodiment, the reducer is used to increase the output torque of the hydraulic motor; and the clutch is used to control the action time period of the electro-hydraulic propulsion subsystem or the self-feedback braking subsystem and the wheel , so that when the speed of the wheel exceeds the tolerance level of the system, the clutch is disengaged to protect the system components, and when the speed of the wheel drops to the allowable range, the clutch is closed to make the system and all The above machine wheel is integrated to perform the driving function.

Description of drawings

Fig. 1 is a schematic structural diagram of a multi-wheel electro-hydraulic propulsion and self-feeding brake combination device according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the electro-hydraulic propulsion subsystem of the multi-wheel electro-hydraulic propulsion and self-feeding brake combination device according to an embodiment of the present invention.

Fig. 3 is a flow diagram of the oil flow in the forward rotation of the wheels under the action of the electro-hydraulic propulsion subsystem of the combined device of multi-wheel electro-hydraulic propulsion and self-powered braking according to an embodiment of the present invention.

Fig. 4 is a flow diagram of the oil flow of the wheels in reverse rotation under the action of the electro-hydraulic propulsion subsystem of the multi-wheel electro-hydraulic propulsion and self-feeding brake combination device according to the embodiment of the present invention.

Fig. 5 is a structural schematic diagram of a self-feeding braking subsystem of a multi-wheel electro-hydraulic propulsion and self-feeding braking combined device according to an embodiment of the present invention.

Fig. 6 is a flow diagram of wheel oil under the action of the self-feedback brake subsystem of the multi-wheel electro-hydraulic propulsion and self-feedback brake combination device according to an embodiment of the present invention.

detailed description

The combined device of multi-wheel electro-hydraulic propulsion and self-feeding brake according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 shows the structure of a multi-wheel electro-hydraulic propulsion and self-feeding brake combination device according to an embodiment of the present invention. As shown in Figure 1, the multi-wheel electro-hydraulic propulsion and self-feeding brake combination device of the present embodiment is installed on a plurality of aircraft wheels, such as each wheel in two wheels, for driving the wheels or making the Wheel brakes. Structurally, the multi-wheel electro-hydraulic propulsion and self-feeding brake combination device includes a variable speed motor 1, a hydraulic pump 2, a one-way valve 3, an electromagnetic reversing valve 4, an accumulator 5, a hydraulic motor 6, a switch valve 7, The safety valves 9, 10 and the hydraulic motor 6 are connected to the wheel 8 through reducers, clutches and other components, powered by the on-board power supply, and controlled by the on-board controller to control the variable-speed motor 1, the electromagnetic reversing valve 4, the hydraulic motor 6 and The switch valve 7 is used to drive or brake the wheel 8 .

In terms of function, the combined device of multi-wheel electro-hydraulic propulsion and self-feeding brake includes electro-hydraulic propulsion subsystem and self-feeding brake subsystem, wherein the electro-hydraulic propulsion subsystem includes motor-pump energy packs 1, 2, 4, 10 and The wheel drive modules 5, 6, 9 are used for the motor-pump energy pack to convert the electrical energy provided by the aircraft power system such as the on-board power supply into hydraulic pressure when the aircraft taxis to the designated place at a normal speed on the ground under the pilot's operation Can be provided to the wheel drive module for driving the wheel 8. The self-feeding brake subsystems 5, 6, 7, and 9 are used to convert the kinetic energy of the high-speed rotating wheel 8 into hydraulic energy after the aircraft lands, so as to brake the wheel 8.

The specific structure of the electro-hydraulic propulsion subsystem will be described in detail below with reference to FIG. 2 .

As shown in Figure 2, the electro-hydraulic propulsion subsystem of this embodiment includes motor-pump energy packs 1, 2, 4, 10 and wheel drive modules 5, 6, 9, wherein the motor-pump energy pack includes a variable speed motor 1. Hydraulic pump 2, electromagnetic reversing valve 4 and safety valve 10, wherein the variable speed motor 1 is used to drive the hydraulic pump 2; the hydraulic pump 2 is connected to the variable speed motor 1 for outputting high-pressure oil; the safety valve 10 is The directional valve 3 is connected in parallel with the hydraulic pump 2 to stabilize the outlet pressure of the hydraulic pump 2 and prevent the oil from flowing backward; and the electromagnetic directional valve 4 is connected to the hydraulic pump 2 via the check valve 3 to connect the high-pressure oil to the wheel. drive module.

As shown in Figure 2, the wheel drive module includes an accumulator 5, a hydraulic motor 6 and a safety valve 9, wherein the accumulator 5 is connected in parallel with the electromagnetic reversing valve 4 for storing the hydraulic energy of the high-pressure oil; the safety valve 9 Connected in parallel with the hydraulic motor 6, it is used to maintain the outlet pressure of the hydraulic motor 6 and the accumulator 5. When the pressure is too high, the oil inlet and the oil return port are connected to release excess pressure; and the hydraulic motor 6 communicates with the The machine wheel 8 is connected to output the pressure energy of the high-pressure oil as torque to drive the machine wheel 8 to rotate forward or reversely.

Referring to Fig. 3 and Fig. 4, the oil flow diagram of the forward or reverse rotation of the wheel under the action of the electro-hydraulic propulsion subsystem will be described below.

Fig. 3 shows the oil flow diagram of the forward rotation of the wheel under the action of the electro-hydraulic propulsion subsystem. Fig. 4 shows the oil flow diagram of the reverse rotation of the wheel under the action of the electro-hydraulic propulsion subsystem. As shown in Figures 3 and 4, when the aircraft taxis to the designated place on the ground at a normal speed under the pilot's operation, the electro-hydraulic propulsion subsystem installed on each wheel 8 is in working condition, and the switch valve 7 is controlled by The onboard controller controls to disconnect the electro-hydraulic propulsion subsystem from the brake actuator, so that the brake actuator does not work.

The variable speed motor 1 drives the hydraulic pump 2 to output high-pressure oil, which is connected to the parallel accumulator 5 and hydraulic motor 6 through the electromagnetic reversing valve 4; the high-pressure oil stores energy for the accumulator 5 and drives the hydraulic motor 6 to rotate and output torque , and then be connected to the wheel 8 itself through the reducer and the clutch to drive the wheel to move. The onboard controller controls the speed of the variable speed motor 1 and the hydraulic motor 6 ; and controls the port position of the electromagnetic reversing valve 4 to change the steering direction of the hydraulic motor 6 so that the wheel 8 rotates forward or reverse.

Among them, the speed reducer is used to increase the output torque of the hydraulic motor 6 and reduce the energy consumption of the system; the clutch is used to control the action period of the whole system and the wheel 8, when the speed of the aircraft wheel 8 exceeds the tolerance level of the system, the clutch is disengaged to To protect the system components, when the speed of the wheel 8 drops to the allowable range, the clutch is closed so that the system is integrated with the wheel 8 to perform the driving function.

Fig. 5 shows the structure of the self-feeding brake subsystem of the multi-wheel electro-hydraulic propulsion and self-feeding brake combination device according to the embodiment of the present invention. The self-feedback brake subsystem utilizes the rotational motion of the wheel itself to collect the rotational kinetic energy of the wheel and convert it into hydraulic energy to drive the brake actuator, which in turn brakes the wheel. Because the energy of the wheel itself is collected and then acts on the wheel brake, it is called self-feedback brake.

As shown in FIG. 5 , in this embodiment, the self-feeding brake subsystem includes a hydraulic motor 6 and a switch valve 7 .

Among them, the hydraulic motor 6 is connected with the wheel 8 via a reducer and a clutch, and is used to convert the kinetic energy of the high-speed rotating wheel 8 into hydraulic energy to output high-pressure oil; the switch valve 7 is connected between the hydraulic motor 6 and the brake actuator. Between, after the aircraft lands, the port position of the on-off valve 7 is controlled by the on-board controller to connect the hydraulic motor 6 and the brake actuator, so that the wheel 8 is braked.

As shown in Figure 5, the self-feedback braking subsystem also includes an accumulator 5 and a safety valve 9, wherein the accumulator 5 is used to utilize the stored hydraulic energy to assist wheel braking; and the safety valve 9 and the hydraulic motor 6 Parallel connection is used to maintain the pressure difference between the inlet and outlet of the hydraulic motor.

And, the rotational speed of the hydraulic motor 6 is controlled by the on-board controller, and as mentioned above, the speed reducer is used to increase the output torque of the hydraulic motor 6; , so that when the speed of the wheel 8 exceeds the tolerance level of the system, the clutch is disengaged to protect the system components, and when the speed of the wheel 8 drops to the allowable range, the clutch is closed so that the system is integrated with the wheel 8 to perform driving Function.

Fig. 6 shows the flow diagram of the wheel oil under the action of the self-feedback brake subsystem of the multi-wheel electro-hydraulic propulsion and self-feedback brake combination device according to the embodiment of the present invention.

As shown in Figure 6, when the aircraft lands, the aircraft speed is very fast, the wheel 8 is in a high-speed rotation state, and the electromagnetic reversing valve 4 of the electro-hydraulic propulsion subsystem is in a disconnected state under the control of the on-board controller. Cut off the connection to the motor-pump energy pack, so only the self-energized braking subsystem works. The high-speed rotating wheel 8 in turn drives the hydraulic motor 6 to output high-pressure oil, and the port position of the switch valve 7 is connected to the connection between the hydraulic motor 6 and the brake actuator under the control of the onboard controller, so that the brake can be activated. perform the braking function on the actuator. At the same time, the energy stored in the accumulator 5 is also used for supplementary braking.

As mentioned above, the present invention provides a combined device for time-division multiplexing of the electro-hydraulic propulsion subsystem and the self-feeding braking subsystem, that is, when the electro-hydraulic propulsion subsystem is working, the self-feeding braking subsystem is idle, And vice versa; thereby reducing the burden on the aircraft hydraulic system, saving the energy of the aircraft hydraulic system, improving the energy utilization rate of the aircraft, and at the same time greatly enhancing the autonomous movement capability of the aircraft and having a high degree of integration.

Apparently, the above-mentioned embodiments are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And these obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims (9)

1. A combination device of multi-wheel electro-hydraulic propulsion and self-feeding brake, installed on each of a plurality of aircraft wheels, for driving or braking the wheels, the multi-wheel electro-hydraulic Combination propulsion and self-regenerative brakes include: The electro-hydraulic propulsion subsystem, including the motor-pump energy pack and the wheel drive module, is used for when the aircraft taxis to the designated place at a normal speed on the ground under the pilot's operation, and the motor-pump energy pack provides the power system of the aircraft the electrical energy converted into hydraulic energy to be provided to the wheel drive module for driving the wheel; and The self-feeding braking subsystem is used to convert the kinetic energy of the high-speed rotating wheel into hydraulic energy after the aircraft lands, so as to brake the wheel. 2. The combination device of multi-wheel electro-hydraulic propulsion and self-feedback brake as claimed in claim 1, wherein the motor-pump energy pack comprises: Variable speed motor for driving the hydraulic pump; a hydraulic pump, connected to the variable speed motor, for outputting high-pressure oil; and The electromagnetic reversing valve is connected to the hydraulic pump via a one-way valve, and is used for connecting the high-pressure oil to the wheel drive module. 3. The combination device of multi-wheel electro-hydraulic propulsion and self-feeding energy braking as claimed in claim 2, wherein said wheel drive module comprises: an accumulator, connected in parallel with the electromagnetic reversing valve, for storing the hydraulic energy of the high-pressure oil; The hydraulic motor is connected to the machine wheel via a reducer and a clutch, and is used to output the pressure energy of the high-pressure oil as torque to drive the machine wheel. 4. The multi-wheel electro-hydraulic propulsion and self-feeding brake combination device according to claim 3, wherein the motor-pump energy package includes a first safety valve connected in parallel with the hydraulic pump via the one-way valve, It is used to stabilize the outlet pressure of the hydraulic pump and prevent oil from flowing backward; and the wheel drive module includes a second safety valve connected in parallel with the hydraulic motor to maintain the hydraulic motor and the accumulator Outlet pressure, when the pressure is too high, connect the oil inlet and oil return port to release excess pressure. 5. The combined device of multi-wheel electro-hydraulic propulsion and self-feeding brake as claimed in claim 3 or 4, wherein the speeds of the variable speed motor and the hydraulic motor are controlled by an on-board controller, and the electromagnetic converter The port position of the directional valve is controlled by an on-board controller to change the steering of the hydraulic motor to drive the wheels forward or reverse. 6. The combination device of multi-wheel electro-hydraulic propulsion and self-feedback brake as claimed in claim 1, wherein the self-feedback brake subsystem comprises: a hydraulic motor, connected to the wheel via a reducer and a clutch, for converting the kinetic energy of the wheel rotating at high speed into hydraulic energy to output high-pressure oil; and A switch valve, connected between the hydraulic motor and the brake actuator, is used to disconnect the connection between the hydraulic motor and the brake actuator when the aircraft is taxiing on the ground under the pilot's operation, and After landing and landing, the connection between the hydraulic motor and the brake actuator is connected to brake the wheels. 7. The combined device of multi-wheel electro-hydraulic propulsion and self-feedback braking as claimed in claim 6, wherein the self-feedback brake subsystem further comprises: an accumulator for assisting said wheel braking with stored hydraulic energy; and The safety valve is connected in parallel with the hydraulic motor and is used to maintain the pressure difference between the inlet and outlet of the hydraulic motor. 8. The combination device of multi-wheel electro-hydraulic propulsion and self-feeding brake as claimed in claim 6 or 7, wherein the rotational speed of the hydraulic motor is controlled by the on-board controller, and the port position of the switch valve is controlled by the on-board The controller controls to connect or disconnect the connection between the hydraulic motor and the brake actuator. 9. The combined device of multi-wheel electro-hydraulic propulsion and self-fed energy brake as claimed in claim 3 or 6, wherein, the speed reducer is used to increase the output torque of the hydraulic motor; and the clutch is used to control the the engagement of the hydraulic propulsion subsystem or the self-energized braking subsystem with the wheel for a period of time such that when the speed of the wheel exceeds the tolerance level of the system, the clutch is disengaged to protect system components, and When the speed of the wheel drops below the allowable range, the clutch is closed so that the system is integrated with the wheel, performing a driving function.