FEM Design of a Cutting-Edge Support System for Micro-GT

IF 1.5 Q3 ENGINEERING, MECHANICAL
F. Stefani, R. Francesconi, Andrea Perrone
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引用次数: 1

Abstract

The design of the support system (shaft, bearings, and mechanical coupling devices) of the rotor plays a key role in the development of efficient micro-gas turbines (micro-GTs) for distributed power generation. Foil air bearings are the most widespread technical solution well suited to design a reliable support system, although they cannot withstand a large number of start-stop cycles of the units. In order to overcome such limitation, we have recently proposed an innovative support system that takes advantage of spline couplings and two bearing types (e.g., air and rolling-element bearings). The devised support system employs splines as both convenient coupling systems and actuators for the load partition between the two bearing types. In the present work, the helical spline coupling is studied by means of structural FEM analyses including contact simulation in order to design the support system. Numerical results confirm previous findings in that the load transfer through the spline coupling is mainly a function of the helix angle. In addition, friction factor and structural stiffness cannot be neglected in the accurate design of the spline coupling. Such design parameters are now included in the proposed design procedure, which formerly assumed frictionless contact and rigid bodies.
微型gt前沿支撑系统的有限元设计
转子支撑系统(轴、轴承和机械耦合装置)的设计是开发高效分布式微型燃气轮机的关键。铝箔空气轴承是最广泛的技术解决方案,非常适合设计一个可靠的支持系统,虽然他们不能承受大量的启停循环的单位。为了克服这种限制,我们最近提出了一种创新的支持系统,该系统利用花键联轴器和两种轴承类型(例如,空气和滚动轴承)。所设计的支撑系统采用花键作为方便的耦合系统和执行器,用于两种轴承类型之间的负载分配。本文采用结构有限元分析方法对螺旋花键联轴器进行了研究,并对其进行了接触仿真。数值结果证实了先前的研究结果,即通过花键联轴器的载荷传递主要是螺旋角的函数。此外,在花键联轴器的精确设计中,摩擦系数和结构刚度也不能忽略。这些设计参数现在包含在提议的设计程序中,该程序以前假设无摩擦接触和刚体。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Advances in Tribology
Advances in Tribology ENGINEERING, MECHANICAL-
CiteScore
5.00
自引率
0.00%
发文量
1
审稿时长
13 weeks
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