Portable device for external field load calibration/strength test of aircraft two-force rod

Abstract

The invention belongs to the field of structural load measurement and strength tests of airplanes, and particularly relates to a portable test device capable of performing a load calibration test and a static test of an airplane two-force bar piece at an external field. According to the portable device for performing the load calibration and strength tests of the airplane two-force bar piece at the external field, a load loading device is installed at one end of a working platform (11), and a test piece base (14) fixedly provided with a third two-lug connector (13) is installed at the other end of the working platform (11); the load loading device is connected with an orientation shaft (7); the other end of the orientation shaft (7) is connected with a test pulling pressure sensor (9) with a second two-lug connector (10); the orientation shaft (7) is installed on the working platform (11) through an orientation shaft seat (8) with a groove in the bottom. According to the portable device, precise control over test loads can be achieved, it is guaranteed that calibrated loads or strength test loads of the two-force bar piece are correct and high in precision, and the requirements are met.

Description

technical field [0001] The invention belongs to the field of aircraft structure load measurement and strength test, and in particular relates to a portable test device capable of carrying out load calibration test and static force test of aircraft two-force member in the field. Background technique [0002] A rod that is only acted on by two forces on the same axis is called a two-force rod. Many control rods on the aircraft can be regarded as two-force rods, such as joysticks, retractable actuators, etc. In the load calibration test of the two-force bar, strain gauges are generally pasted on the two-force bar, and then tension and compression loads are applied to the two-force bar. The load must be applied on the axis of the two-force bar. If the load axis and the axis of the two-force rod are not on the same straight line, an additional moment will be generated on the axial section of the two-force rod, causing the loading form of the two-force rod to be unrealistic, and t...

AI Technical Summary

Problems solved by technology

If the load axis and the axis of the two-force rod are not on the same straight line, an additional moment will be generated on the axial section of the two-force rod, causing the loading form of the two-force rod to be unrealistic, and the strain gauges pasted on the two-force rod will also be damaged. It cannot truly reflect the tensile and compressive strain of the two-force rod

[0003] In the past, the load calibration / strength test of the two-force rod was carried out on the material testing machine. Because the material testing machine is generally heavy, bulky and relatively expensive, it is often impossible to carry the material testing machine for the load calibration / strength test of the two-force rod in the field. to the site for testing

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