Structural Analysis of the Multi-ring Flywheel Packing Heavy Alloy for Reactor Coolant Pump

doi:10.3901/JME.2018.14.191

Abstract

Abstract: The design of multi-ring flywheel packing heavy alloy is one of effective methods to improve the rotation inertia for a reactor coolant pump flywheel. To ensure the flywheel structural safety at critical working condition, finite element analysis method is adopted to carry out the steady thermal stress analysis process considering the interference-fit and rotating force simultaneously, moreover, to study the effect of high temperature on the structural design of reactor pump flywheel. Firstly, finite element analysis model consisting of inner hub, tungsten alloy layer and outer retainer is established to evaluate the thermal stress of flywheel under high temperature. Then, the thermal stress characteristics of two kinds of flywheel structures respectively comprised of integrity tungsten alloy layer and tungsten alloy segments are further studied. In addition, the effect of the number of tungsten alloy segments on the structural design is further studied to seek the optimal number. Finally, the results indicate that the high temperature will give rise to high thermal stress in the tungsten alloy layer. However, the flywheel design comprised of tungsten alloy segments with optimal number can significantly release the high thermal stress.

Key words: multi-ring, reactor coolant pump flywheel, thermal stress, tungsten alloy segments

CLC Number:

TG156

JIANG Lu, WU Chengwei. Structural Analysis of the Multi-ring Flywheel Packing Heavy Alloy for Reactor Coolant Pump[J]. Journal of Mechanical Engineering, 2018, 54(14): 191-197.

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