A flexible shaft torsion performance test device

Abstract

The invention relates to the field of torsion performance testing, in particular to a flexible shaft torsion performance testing device. It includes: a flexible shaft (7), a rotating shaft (2), a bushing (8) and a weight (13). In this device, during the test, the axial force is restrained by the deep groove ball bearing (5), and the application of torque is only affected by the friction force between the inner and outer rings of the bearing (5), and the friction coefficient between the inner and outer rings of the bearing is small, resulting in The error can be ignored; the torque is constrained by the gasket (10), the influence on the axial force is mainly reflected in the elastic force generated when the gasket (10) is bent, and because the gasket (10) is thin, axial bending deformation occurs , the elastic force is small, which can be offset by the method of calibration during the test, and can effectively restrain the flexible shaft (7) in the torsional direction; apply torque to the flexible shaft (7) through a torque wrench, compared with the existing test device Loading by weights and pulleys reduces errors due to friction.

Description

technical field [0001] The invention relates to the field of torsion performance testing, in particular to a flexible shaft torsion performance testing device. Background technique [0002] Such as figure 1 As shown, the torsional performance test of the flexible shaft of the thrust reverser needs to fix one end of the flexible shaft (fixed point A) on the tester, apply an axial force to the end along the length of the flexible shaft to straighten the flexible shaft, and fix the other end of the flexible shaft at the same time (fixed point B), right-handed torque is applied, and the twist angle of the flexible shaft is measured. [0003] Existing trials such as figure 2 As shown, it includes weight 13, pulley 15, fixed point A second clamp 9, flexible shaft 7, fixed point B first clamp 6, rotating shaft 2, bearing 5, fixed seat 4, pointer 1, gasket 10, guide rail 14. Dial 3 and twist disc 16 are formed. This device fixes one end of the flexible shaft 7 through the secon...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the existing test device is that there is friction between the second fixture 9 and the guide rail 14 at the fixed point A, and between the rotating shaft 2 and the fixed seat 4, so during the loading process, the torque and the axial force interfere with each other, that is, The friction force between the second fixture 9 and the guide rail 14 at fixed point A will change with the application of torque, and the friction force between the rotating shaft 2 and the fixed seat 4 will also increase with the application of axial force, so that the actual action There may be a large error between the load on the flexible shaft 7 and the given load

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