Structural Strength And Vibration Analysis Of The Turbo-generator Stator

Electricity is an important foundation for people's lives and new industrial development in modern society. Turbo-generator which mainly composed of stator and rotor is one of the most important power generation equipment. Turbo-generator stator mainly includes stator shell, stator core and stator windings. Turbo-generator stator structural strength and vibration have important impact factors on the normal operation of the unit. Traditionally, design of the stator structure are according to experience, this exists blindness in design, design cycle is long, the higher cost and so on. To meet the increasingly rich, personalized market needs, companies urgently need the scientific method to improve the design. This paper combined CAD/CAE technology with experimental method to solve these problems.Structural strength is key performance indicators of the shell of the turbo-generator. To discus the problems of the structural strength in this paper, we used finite element plate element theory to create the stator structure of the whole finite element model, finish the analysis of the strength of she shell, verify the strength to meet the requirements standard.Turbo-generator stator structure vibration is the main problem to the safe operation of the unit. In this paper, we used finite element method to calculate the stator shell and the overall of the vibration modes, and secondly, binding force and vibration testing aspects of theoretical knowledge, for the turbo-generator stator structure vibration problems, through field trials to test the stator structural vibration modes, thirdly, compare the finite element calculation results with test results, analysis error causes. Finally, based on the sensitivity method, through modal amendments. we got a more accurate finite element model that reflects the true stator, providing a reference for the stator structure computer-aided design.Under the reasonable design, manufacture and safety premise, we introduce the genetic algorithm (GA) to optimize the structure of the shell to improve the stress distribution, this saved 12.2% of the material.With the prototype through the trial, compared the results of the analysis with the prototype test results, optimized turbo-generator prototype of the parameters meet the design standards.