A rotating micro radial displacement loading fatigue test equipment

Abstract

The invention discloses fatigue testing equipment for rotary micro radial displacement loading. The fatigue testing equipment comprises a platform, an actuating cylinder, a dynamometer, a linear bearing, a guide rod, a joint bearing, a loading rod component, a simulated bearing, a joint bearing, a simulated special bearing, a simulated bearing block, an elastic supporting structure, a dial indicator, a bending component, a force bearing frame, upright posts and a motor, wherein the guide rod is provided with the linear bearing; horizontal force is applied to the lower end of the loading rod component by adjusting a nut on the bending component, so that the elastic supporting structure generates the required radial displacement; the outer surface of the inner ring of the elastic supporting structure is provided with the dial indicator for measuring the radial displacement; the motor drives the bending component to rotate to apply rotary displacement to a test piece. The fatigue testing equipment has the advantages that small displacement is amplified by a lever, and the controlled loading of the micro radial displacement is realized; by monitoring the strain of elastic supporting structures at different positions, the uniformity of the small displacement is indirectly monitored, and the problem of interference of axial load and radial load is solved.

Description

technical field [0001] The invention relates to the field of radial displacement loading equipment, in particular to a rotating micro radial displacement loading fatigue test equipment. Background technique [0002] According to the working conditions of the elastic support structure on the engine, it is necessary to study the test technology that can apply axial load and rotational radial displacement to the elastic support at the same time, and conduct fatigue tests. At present, there is a lack of relevant special fatigue testers. The eccentric displacement is small, only about 0.1mm, and it is difficult to accurately control the loading accuracy during loading; in addition, the eccentric displacement requires high-speed rotation, and it is difficult to ensure the uniformity of the load; in the long-term fatigue test, the diameter of the mechanical parts after wear The axial displacement cannot be automatically compensated; the radial displacement of the elastic support st...

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Problems solved by technology

The eccentric displacement is small, only about 0.1mm, and it is difficult to accurately control the loading accuracy during loading; in addition, the eccentric displacement requires high-speed rotation, and it is difficult to ensure the uniformity of the load; in the long-term fatigue test, the diameter of the mechanical parts after wear The axial displacement cannot be automatically compensated; the radial displacement of the elastic support structure cannot be monitored in the rotating state; the radial displacement loading requires the fulcrum position to be fixed, while the axial load loading will inevitably cause the fulcrum position to change, and there is interference between the two

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