A simple test device and test method for dynamic and static torsional stiffness of an elastic coupling

Abstract

The invention provides an elastic coupling dynamic and static torsion rigidity simple testing device and method. One end of an elastic coupling is fixed, and a loading arm and a torque preloading device are arranged on the other end. The torque preloading device is used to preload torque of a certain degree, a turning angle indicating gauge measures a static angular displacement of the coupling, a preload force is converted into preload static torque, and the static torsion rigidity of the coupling is obtained; and the loading arm is excited by a vibration exciter, an impedance head is utilized to measure the dynamic force and dynamic acceleration of an excited point of the loading arm, the force and acceleration are converted into the torque and dynamic angular displacement, and finally the dynamic torsion rigidity of the coupling is obtained. According to the invention, a special test table is not needed, the installation and adjustment are convenient, both the static torsion rigidity and the dynamic torsion rigidity can be measured, the vibration exciter is used for dynamic loading, the exciting frequency and amplitude can be conveniently adjusted on line, and the torsion rigidity under different working frequencies can be conveniently tested; in addition, dual-bearing constraint is adopted, bending-torsional coupling generated when the coupling is excited is avoided, and the measuring result is more precise.

Description

technical field [0001] The present invention relates to a testing device for an elastic coupling, and the present invention also relates to a testing method for an elastic coupling, specifically a torsional stiffness testing device and testing method for an elastic coupling . Background technique [0002] The dynamic and static characteristic parameters of the elastic coupling have a great influence on the torsional vibration of the shafting. The characteristic parameters of elastic coupling mainly include torsional stiffness and damping. Dynamic torsional stiffness refers to the ratio of the elastic torque to the amplitude of the corresponding torsional angle in one vibration cycle. Damping refers to the ratio of damping work converted into heat to elastic deformation work in one vibration cycle. Obtaining the characteristic parameters of the elastic coupling becomes the key to study the torsional vibration control performance and design the coupling on this basis. The ...

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Problems solved by technology

However, the driving device of this traditional test bench is complicated, especially the torque loading and measuring device, which requires a special hydraulic or cam driving device, which makes it troublesome to install and center the test piece, and the loaded dynamic torque is not easy to adjust accurately, and the frequency range of the dynamic torque is very limited

[0005] In addition, when the conventional method measures the torsional stiffness of the coupling, the excitation position is often far away from the coupling, which will introduce the torsional stiffness of the shaft itself, and the inertia of the rotating shaft and the rotor of the loading device will also affect the dynamic stiffness. The measured results are the coupling and The mixed torsional rigidity of the shaft is prone to large errors

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