Finite Element Analysis Design of a Split Rotor Bracket for a Bulb Turbine Generator

Abstract

The rotor bracket is a key component of the generator rotor with cracks in the rotor bracket leading to rubbing between the rotor and stator, which threatens safe operation of the unit. The rotor rim is so complicated that the equivalent radial stiffness of rim was determined by numerical simulation other than engineering experience. A comprehensive numerical method including finite element analyses and the contact method for multibody dynamics has been used to design the split rotor bracket. The com-putational results showed that cracks would occur in the initial design of the bracket when the turbine operated at the runaway speed, and the bracket design should be improved. The improved design of the bracket was strong enough to avoid cracks and rub between the rotor and stator. This design experience will help improve the design of split rotor brackets for bulb turbine generators.

Investigation of the Starting-Up Axial Hydraulic Force and Structure Characteristics of Pump Turbine in Pump Mode

“…They found that the stress caused by hydraulic force is one of the main reasons of the runner fatigue failures and cracks. In terms of the other essential components of pump turbines, Luo et al [32][33][34] focused on the stress of the rotor bracket of the generator and the piston rod of the blade. Improvements in design are made based on stress analyses.…”

Influence of Crown Margin Design on the Stress Distribution in Maxillary Canine Restored by All-Ceramic Crown: A Finite Element Analysis

“…In engineering applications, FEA allows optimization of weight, materials, costs and entire designs to be constructed, before the design is manufactured 15) . The FEA method has several advantages over other methods; at first, solid objects having complex geometry can be modeled with realistic assumptions of a material, by which a realistic model can be created using software.…”