Method for monitoring torsional vibration damper

Abstract

The invention discloses a method for monitoring a torsional vibration damper. The torsional vibration damper has a connecting part (2) connectable to a shaft and a vibration rotating body (3) connected to the connecting part (2) in a rotationally elastic manner. The connecting part (2) and the vibration rotating body (3) ) is digitally measured and converted in the computing station to output characteristic values. In order to ensure favorable monitoring conditions, the invention proposes to determine the relative twisting angle between the two parts (2, 3) and furthermore determine the vibration rotation by simultaneously measuring the angle of rotation of the connecting part (2) and the vibration rotating body (3). The rotational angular acceleration of the body (3), taking into account any changes in the angular velocity of the connecting part (2), and with the help of a vibrating rotating body (3) by constructing a predetermined mass moment of inertia the torsional stiffness and torsional damping are calculated and displayed as characteristic values .

Description

technical field [0001] The invention relates to a method for monitoring a torsional vibration damper having a connection part connectable to a shaft and a vibration rotating body connected to the connection part in a rotationally elastic manner, the connection part and the vibration The angle of rotation of the rotating body is digitally measured and converted in a computing station to output characteristic values. Background technique [0002] In drivetrains in which torsional vibrations occur, for example in the case of drivetrains with internal combustion engines, torsional vibration dampers are used which limit torsional vibrations to permissible magnitudes and thus reduce the torsional vibrations resulting from torsional alternating stress The strain of the driving part is limited to the allowable value. The unimpaired function of the damper is thus of considerable importance in such drive trains, so that at least in certain cases the torsional vibration damper is cont...

AI Technical Summary

Problems solved by technology

Based on the detection of the joint part of the torsional rotation damper and the digital rotation steps of the vibrating rotating body, the measurement of the torsion angle can be easily carried out, but the comparison between the measured torsion angle and the predetermined limit value does not allow Torsional vibration dampers are monitored with the accuracy required for many intended uses, since such monitoring requires knowledge of specific torsional rigidity and torsional damping

It has been proposed to calculate the torsional rigidity of a torsional vibration damper by measuring the transmitted torque and the relative torsion angle between the connecting part and the vibrating rotating body to which it is connected in a rotationally elastic manner, but it is difficult This torque load is measured by the strain gauge in synchronization with the digital rotation steps

Furthermore, the use of strain gauges while taking into account the required signal transmission is only possible at great expense and, moreover, only in a restricted manner in torsional vibration dampers

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