Device for testing damping characteristic of shimmy damper

Abstract

The invention discloses a damping characteristic testing device for a shimmy damper, the rear end of a short swing arm is fixed in a long circular ring, the rear end of a long swing arm is fixed in a short circular ring, the long circular ring and the short circular ring are connected through a key slot, and the long circular ring and the short circular ring are rotatably connected to a workbench through a bearing and a fixed shaft respectively; one end of the torque sensor is hinged in a pin shaft hole in the front end of the short swing arm through a pin shaft, and the shimmy damper is fixed between the torque sensor and the fixing clamp; lifting lugs perpendicular to the side face of the long swing arm are fixed to the two sides of the free end of the long swing arm, and two pulleys installed on a pulley base are arranged at the positions opposite to the two lifting lugs. A thrust cylinder, a blocking cylinder and initial and tail end travel switches capable of finely adjusting the distance between the thrust cylinder and the blocking cylinder are arranged on two sides of the free end part of the long swing arm; the initial travel switch and the tail travel switch are connected with a PLC which is connected with a timer. The air pump supplies air to the two thrust air cylinders and the blocking air cylinder. The device can realize constant loading so as to realize the damping characteristic test of the shimmy damper and determine the damping coefficient of the shimmy damper, and is simple in structure and low in cost.

Description

technical field [0001] The invention belongs to the field of testing the characteristics of a vibration reducer, and relates to a device for testing the damping characteristics of a vibration reducer. Background technique [0002] Tricycle landing gear is widely used because of its obvious advantages, but it also has some problems, and the front wheel shimmy is one of the outstanding problems. Therefore, many countries in the world have launched research on the front wheel shimmy problem, and have clarified some main factors of the front wheel shimmy. Landing gear shimmy has been a serious failure factor of aircraft for a long time, and simply relying on the structural adjustment of the landing gear itself is often not enough to prevent shimmy. Long-term practice has proved that installing a shimmy absorber on the landing gear is the most effective way to prevent shimmy. [0003] Shock absorber is an essential part of landing gear anti-sway system. How to select the dampin...

AI Technical Summary

Problems solved by technology

Existing test devices for shock absorbers are tested by generating excitation signals. The accuracy of the test is high, but the device is large, the test process is cumbersome, and the cost is high. Not all shock absorber manufacturers can spare it. Therefore, Some manufacturers also rely on external testing, resulting in long production cycles

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