Maintaining balance

Schenck Balancing and Diagnostic Systems has announced its re-entry into field balancing and vibration analysis with the compact, battery powered SmartBalancer.

Schenck Balancing and Diagnostic Systems has announced its re-entry into field balancing and vibration analysis with the SmartBalancer.

The new Schenck SmartBalancer is said to be the ideal tool for checking the vibration of an assembly and for accurately identifying and correcting unbalance in rotating machinery. With the SmartBalancer, operators have complete on-site field balancing capability and the compact, battery powered instrument enables rotors to be balanced quickly without dismantling the machine. Rotors of almost any size or weight can be balanced statically and dynamically.

According to Schenck, operators are prompted through the sequence of steps required to measure and eliminate rotor unbalance. A variety of combinations are possible such as simultaneous horizontal, vertical and axial measurements, or two horizontal and two vertical measurements.

“Vibration is an excellent indicator of the status of individual machine components and of the machine as a whole,” says Nigel Best, manager of Schenck Balancing and Diagnostic Systems (UK). “The new SmartBalancer performs a broadband measurement of absolute bearing vibrations to compare measured values with specified limits to ascertain whether a machine is operating within its specified vibration level, or if this is exceeded whether field balancing is necessary.”

To determine the causes of vibration, the SmartBalancer also offers FFT (Fast Fourier Transform) analysis with constant absolute bandwidth and SmartFFT with constant relative bandwidth.

Both methods enable measured vibrations to be separated into harmonic portions and displayed with frequency and amplitude in the form of spectral lines. Results can be viewed numerically or in polar display to provide an easy to read graphical representation.

Correction locations can be identified in polar or component form based on the configuration of the rotor that is being balanced. Rotors that have limited correction locations, such as a fan for example, can be easily balanced with the component correction feature. Users are free to define the available correction locations on the rotor whether they are equally or unequally spaced.

All balancing results can be recorded in the SmartBalancer along with a description of the machine, sensor position, date and time. Measurement data can also be downloaded to a PC or laptop for filing and further analysis using Schenck’s SmartReport PC software supplied with the balancer. Users can create balancing reports with Bode and Nyquist plots and cascade/waterfall charts. Measurement results can also then be imported to other programs in the Windows Office suite such as Word or Excel for further processing.

The unit costs less than £7,000.