The methods employed in shop balancing can have a profound impact on the resulting balance condition of the rotor. The impact of shop balance technique is most important when the rotor is relatively flexible and/or long as is common with most turbomachinery. To improve the balance condition of most high speed flexible rotors, the following ...

May 30, 2013 · A common misunderstanding associated with balance drum systems is that a balance drum always reduces the rotor thrust to zero. This statement may or may not be true, depending on the thrust balance system design. And even if it is, the thrust is zero only at one set of operating conditions. Another misconception regarding thrust balance systems ...

The first section and second section share a common rotor. A first balance drum is disposed between the two sections, while a second section is disposed between the first inlet duct and the rotor. In a single section compressor, the balance drum can be disposed on the inlet side of an impeller rather than a discharge side.

Jul 19, 2019 · Such rotors need to be balanced exclusively either on a balancing machine or with a portable balancing device. The main sources of vibration are: The main rotor of the combine, if it is a rotary combine. The threshing drum, beater. The straw chopper. If balancing on a machine, for shredders, demand at least G 2.5 according to ISO 21940.

A rigid rotor can be balanced at the two end planes and will stay in balance when in service. A flexible rotor will require multi-plane balancing. If a rotor is balanced on a low speed balancing machine assuming it is rigid and then in service becomes flexible, then unbalance and thus high vibration, will be the result.

In the field of disk-type rotors, Hofmann offers a versatile machine program for all known rotor types. Whether brake disk, brake drum, flywheel or dual mass flywheel, starter ring or driver plate, wheel flange or wheel hub need to be balanced, Hofmann's V-Line module kit offers the right solution for each of these rotor types.

May 28, 2017 · The methods employed in shop balancing can have a profound impact on the resulting balance condition of the rotor. The impact of shop balance technique is most important when the rotor is relatively flexible and/or long as is common with most turbomachinery. The article contains excerpts from the paper, “Rotor balancing tutorial” by Ray Kelm, Dustin Pavelek and Walter Kelm of Kelm ...

a Kukchol Yun: [email protected] A shape modification of the balancing slot of the impulse turbine stage with the drum rotor arrangement Kukchol Yun1,a, L. Taj 2 and M. Kolovratník1 1Czech Technical University in Prague, Department of Mechanical Engineering, Technická 4 Praha 6, Czech Republic 2University of West Bohemia, Department of Mechanical Engineering, Univerzitní 22 Plze, Czech ...

The balancing device on centrifugal pumps is designed to fully or partially compensate axial thrust generated by the pump rotor. Designs incorporating a single balance drum or double drum require a thrust bearing to absorb the residual thrust.. If the balancing device consists of a balance disc, the entire axial thrust of the pump rotor is usually balanced.

Sep 1, 2020 · Having achieved the balancing assessment at a particular speed, a rotor needs to be brought back to a standstill to apply balance weights before the procedure can continue. With the old system, a regeneration drive acted as a brake, and also fed the energy generated by the slowing rotor, back into the grid. Drive upgrade