Monitoring system for torsional vibration.
The Geislinger Monitoring is an instrument designed to continuously monitor torsional vibration amplitudes. The system gives an alarm signal when safety limits are reached or exceeded.
From measurements taken on one or two torsionally vibrating elements, for instance on a coupling or damper, the values of the static and dynamic twist between the elements and the vibratory angle of the elements are calculated. If an operating limit is exceeded, an alarm is activated. The calculated torsional vibration values are shown on the LCD display as figures and graphically in a bar graph or as FFT analysed values.
For processing the calculated values the system unit can be connected to a PC. The data in ASCII-text format can be recorded by a terminal programme (included in MS-Windows) and plotted as graphs in a spreadsheet (e.g. MS-Excel). The recorded data can be sent to Geislinger via e-mail where it is analysed. If the evaluation of the measurements shows that the damper/coupling is working properly, it can be justified with the classification society that no overhaul is necessary.Should an overhaul be necessary it can be planned and the spare parts can be ordered in time.
For signal detection normally inductive sensors are used which are mounted in a fixed position against the rotating gear wheels. If gear wheels are not available, the use of angular encoders is also possible.
This instrument has three monitoring functions for which the software is tailored to the specific requirements:
Detection of Misfiring
The Geislinger Monitoring is designed to monitor installations where some components can be damaged by high torsional vibration levels caused by a cylinder misfiring.The alarm signal can for instance be used to reduce the load or to disengage a clutch in order to avoid excessive vibration levels.
Tuned Damper Monitoring
Tuned vibration dampers eliminate critical torsional vibration throughout the operational speed range of an engine. Geislinger Monitoring was developed to ensure trouble free operation throughout the life of an engine.
Coupling Monitoring
The Geislinger Monitoring monitors the coupling and calculates the transmitted power and torque. The system unit shows the static torque of the engine load and the dynamic torque of the torsional vibration.
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