SU502274A1 - Aircraft tire tester - Google Patents

Description

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The invention relates to the field of testing tires and brakes of aircraft aircraft landing gear wheels.

Air tire tire testing devices are known, including an inertial drum, a drum driving motor, a driving motor amplifier for varying the rotation speed of its shaft, a power actuator with a rod for attaching an air wheel with a tire, and an actuator amplifier.

However, such devices do not allow automatic, functional, and continuous changes in both the drum speed of the test mill and the shrinkage of the airwheel when the drum speed changes, leading to a significant increase in the accuracy of dead-wheel airtight wheels.

The purpose of the invention is to bring the conditions of tire tests of air wheels to real conditions of operation by automatically, Functionally and continuously changing the speed of rotation of the drum and shrinking of the tire of the air wheel when changing the speed of rotation of the drum.

For this, the proposed device is equipped with a functional unit for varying the speed of rotation of the drum, the first summing element, the output of which is connected

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with a drive motor amplifier, a functional unit for changing the shrinkage of an aircraft tire, a second summing element, the output of which is connected to an actuator amplifier, a drum speed sensor connected to the shaft of the drive motor and an output connected to the input of the first summing element, and a movement sensor rod actuator connected to the output connected to the input of the second summing element.

The drawing shows a block diagram of the proposed device.

The device contains a functional setting unit 1 for changing the rotational speed of the drum, the output of which is electrically connected to one of the inputs of the first summing element 2. The output of the first summing element 2 is electrically connected to the input of the amplifier of the drive motor 3, the output of which is connected to the drive drum 4 of the drum. The output shaft of the Barbara drive motor 4 is mechanically coupled to the inertia drum 5 and the drum rotation speed sensor 6. The output of the sensor 6 is electrically connected to the second input of the first summing element 2 and to the input of the function setter 7 for changing the shrinkage of the air wheel tire. Setpoint 1 output electrically

connected to one of the inputs of the second summing element 8, the output of which is connected to the input of the amplifier 9 of the actuating element. The output of the amplifier 9 is electrically connected to the input of the actuator 10, the output element of which is the stem Nershn is mechanically connected to the axis of the airwheel, bus II and the sensor 12 of the movement of the piston rod of the actuator whose output is electrically connected to the second input of the second summing element eight.

The device works as follows.

Using the function adjuster for changing the rotational speed of the drum 1, a signal for changing the rotational speed of the rotation of the drum over time and depending on the type of aircraft under test, its take-off or landing speed is automatically and continuously generated. This signal goes to the input of the first summing element 2, the second input of which from the drum speed sensor 6 receives the signal of the actual speed of rotation of the inertial drum 5. The algebraic difference of these two signals from the output of the first summing element 2 is fed to the amplifier of the drive motor 3. The amplified signal is received to the main winding of the drive motor 4, which changes the speed of rotation of the inertial drum 5 to the desired value.

At the same time, the signal of the actual speed of rotation of the inertial drum 5 from the sensor 6 is supplied to the functional adjuster 7 for changing the shrinkage of the air wheel tire. Functional setting device 7 generates a signal proportional to the change in shrinkage (load) of the air wheel tires depending on the speed of rotation of the drum 5 and the amount of the air wheel being tested. This signal is fed to the input of the second summing element 8, to the second input of which from the sensor 12 of the displacement of the piston rod of the executive mechanism, a signal is given of the actual shrinkage of the tested X-inch of the yo-wheel. The algebraic difference of these two signals from the output of the second summing element 8 is fed to the amplifier 9 of the actuator. The voltage amplified signal is applied to the actuator 10, which, when pressed against the surface of the rotating inertia drum 5 of the aircraft’s tire II, mounted on the piston rod of the actuator, changes the shrinkage (load) of the test tire by an amount proportional to the signal from the function unit 7.

Claims (1)

Invention Formula A device for testing air wheel tires, comprising an inertial drum, a drum driving motor, a driving motor amplifier for changing the rotation speed of its shaft, a power actuator with a rod for attaching the air wheel with a tire, and an actuator amplifier, characterized in that real conditions of operation by automatic functional and continuous change of the speed of rotation of the drum and the shrinkage of the air wheel tire when the speed of rotation changes drum, it is equipped with a functional unit for changing the rotational speed of the drum, the first summing element, the output of which is connected to the drive motor amplifier, the functional unit for changing the shrinkage of the air wheel shell, the second summing element, the output of which is connected to the amplifier of the actuator, a drum speed sensor connected to the shaft drive motor and with an output connected to the input of the first summing element, and an actuator rod displacement sensor connected to an output connected to the input of the second summing element.