Chuck-type wing loading device

Abstract

The invention belongs to the aircraft strength test technology, and relates to a chuck-type wing loading device, which includes a pulling plate bolt, a pulling plate, a loading chuck, a loading wood block, a square rubber pad, a chuck compression bolt, a chuck connecting bolt, a bush, a spring washer, a rear spar, a wing profile, a rear spar actuator cylinder, a front spar and a front spar actuator cylinder. The invention is solid in mounting, the test load is accurately applied, the front spar load applying and the rear spar load applying are not influenced by each other, the device weight is accurately deducted, and the device does not increase the vertical stiffness of the wing profile.

Description

technical field [0001] The invention belongs to the aircraft strength test technology, and relates to a chuck type wing loading device. Background technique [0002] In the aircraft structural strength test, especially the fatigue test, the wing load is usually processed to the position of the front and rear beams of the wing, and is applied through the actuator installed on the lower wing surface. The loads at the position of the front and rear beams of the wing have three situations: simultaneous upward, simultaneous downward, and one up and one down. When the wing load is upward, the actuating cylinder is extended and applied, and the actuating cylinder bears the compressive load. When the wing load is downward, the actuating cylinder is contracted and applied, and the actuating cylinder bears the tensile load. [0003] The most effective wing loading device at this stage is a rigid pallet loading device, such as figure 1 As shown, firstly, glue the rubber plate and the...

AI Technical Summary

Problems solved by technology

In this rigid pallet loading device, the machining error of the four loading wooden blocks on the wing surface is compensated by the vertical deformation of the wing after the rigid pallet is installed, and it is easy to apply an excessive clamping load to the wing, resulting in The local pressure of the wing is destabilized or even destroyed; on the other hand, the rigid clamp loading device increases the vertical stiffness of the wing section, which actually strengthens the wing section structure and changes the load-bearing characteristics and transmission characteristics of the wing structure. The force characteristics have a great influence on the test results; third, the rigid clamp loading device rigidly connects the front and rear beams together, the clamps cannot rotate front and rear, and the magnitude and direction of the load on the front beam will affect the load on the rear beam. Size and direction, the size and direction of the load applied on the rear beam will affect the size and direction of the load applied on the front beam, the essence is that the loads applied on the front and rear beams interfere with each other, making the load application and equipment weight deduction inaccurate

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