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High-accuracy airplane wheel pre-rotating mechanism for drop test of airplane landing gear

An aircraft landing gear, high-precision technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of high requirements for the azimuth layout of other components in the test, the difficulty of accurately controlling the rotation speed of the wheels and tires, and the impact on the accuracy of test results, etc., to achieve a simple structure , low equipment cost and stable performance

Active Publication Date: 2011-05-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This friction wheel pre-rotation method has unavoidable limitations. First, there is a time difference between the friction wheel retraction and the wheel tire hitting the ground, resulting in a large loss of wheel speed. It is difficult to accurately control the speed of the wheel tire when it touches the ground, which affects the test. accuracy of results
Secondly, this method requires a set of hydraulic drive mechanism to ensure the follow-up and withdrawal of the friction wheel, and the test cost is relatively high. In addition, the follow-up and withdrawal of the friction wheel are likely to interfere with other test components, so the azimuth arrangement of other test components more demanding

Method used

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  • High-accuracy airplane wheel pre-rotating mechanism for drop test of airplane landing gear
  • High-accuracy airplane wheel pre-rotating mechanism for drop test of airplane landing gear

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Embodiment Construction

[0014] The invention is a high-precision wheel pre-rotation mechanism for aircraft landing gear drop test, which includes a hanging basket 1, a support 2, a base 3, a pin 4, a motor pulley 5, a spring 6, a positioning bracket 7, a magnet 8, and a V-shaped Belt 9, friction wheel belt pulley 10, friction wheel 11, machine wheel 12, landing gear 13, landing gear clamp 14, fixed plate 15, motor 16, connecting strip 17, pendulum frame 18, electromagnetic lock 19, lifting mechanism 20, test Stand 21, impact platform 22, travel switch 23, slideway 24. Wherein the base, the positioning bracket and the support are respectively installed on the bottom plate of the hanging basket, and a magnet is installed at the end of the positioning bracket. The pendulum is connected to the base through pins, and the pendulum can move freely around the pins. During the test, butter is applied to the pins to reduce friction. The motor and the friction wheel are installed on the swing frame, the fricti...

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Abstract

The invention discloses a high-accuracy airplane wheel pre-rotating mechanism for a drop test of an airplane landing gear. The mechanism comprises a hanging basket and a landing gear, wherein the landing gear is fixed at the lower end of the hanging basket; the lower end of the hanging basket is provided with a swing frame; the upper end of the swing frame is rotationally connected with the hanging basket; the lower end of the swing frame is provided with a friction wheel; the swing frame is provided with a motor; an output shaft of the motor is in transmission connection with the friction wheel; a first positioning device for positioning the swing frame at a first position is arranged between the swing frame and the landing gear; and at the first position, the friction wheel is in close contact with an airplane wheel of the landing gear and drives the airplane wheel to rotate. The mechanism has a simple and compact structure, stable performance and high accuracy, and is convenient to operate.

Description

technical field [0001] The invention belongs to a class of test devices, which can be applied to aircraft landing gear drop shock tests and tire tests. technical background [0002] The landing gear is an important load-bearing part of the aircraft. The design of a new type of landing gear requires a series of ground drop tests to adjust the buffer filling parameters and the size of the oil hole to improve the cushioning efficiency of the landing gear. The test can also verify the landing gear. Whether the structural strength and rigidity of the landing frame can meet the design requirements. The ground drop test of the aircraft landing gear needs to simulate the real movement process and force condition of the landing gear when the aircraft lands. One of the most important items is the simulation of the aircraft's horizontal landing speed. There are two methods for the landing impact test of aircraft landing gear. One is to build a high-speed rail-carrying taxi on the grou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/00G01B21/02
Inventor 聂宏安红辉薛彩军张卓坤万俊麟
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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