Rotors, Blades and Beams

Rotor Stands

When not in operation, or during the completion of maintenance work, a turbine rotor is typically supported by stands at each end. The video below shows an analysis of a turbine rotor on its supporting stands.

The analysis of the assembly is used to evaluate the strength of the supports whilst considering the effect on the rotor.

 

Lifting Beam

Analysis of lifting equipment and devices, such as the lifting beam shown below, is completed according to international standards such as ASME B30.20, ASME BTH-1 and BS EN 13155.

Complying with Occupational Health and Safety Act and Regulations (85 of 1993) is also a requirement for South African companies.

The video below shows the stresses developing in the lifting beam as the lifting load is increased.

 

Turbine Blade

Turbine blades are typically separate parts that are fitted to the rotor body. A number of different blade-to-rotor interface designs are seen in industry.

The video below compares the stress results, at the blade-to-rotor interface, for two different interface designs. Under centrifugal loading, at an operational speed of 3000 rpm, it is seen how the original design concept is prone to higher stresses at the interface. The improved concept performs better under the applied load.

 

For geometry source files visit: LP Turbine

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