Torsional vibrator
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Derritron Electronics have developed a torsional electromagnetic vibrator that operates on the principle of a reciprocating vibrator. It is designed for investigation of torsionalvibration characteristics of equipment incorporating rotating parts such as a crankshaft, drive shaft, gear wheel train, motor armature, flexible coupling, torsional vibration damper and so on, for which it is necessary to provide a controllable means of applying vibration.
The force characteristics over the operating frequency range have been chosen to suit the two basic service requirements. At the lower end of the frequency range the vibrator is usually required for producing large displacements at frequencies well below the resonance region of the test specimens.
The force available, therefore, needs to be as large as possible. Conversely, at the higher end of the frequency range the vibrator is more likely to be used for investigating conditions accompanying high-frequency resonances. Smaller force is, therefore, adequate for producing measurable stresses or accelerations.
A feature of the vibrator is ease of accessibility and its serviceability. The top magnetic ring has been split into three segments and by removing the segments the whole of the working system can readily be removed from the mach Changing the AC coil or ce bearing is, therefore, a quick simple operation.
Apart from the study vibration problems, the eq ment can be used in design development stages.
Made by: Derritron Electro Ltd, Sedlescombe Road, N Hastings, Sussex.