Torsional Behavior of Annular Flat Contact Shaft Segment Attached with Torsion Pins

doi:10.7652/xjtuxb201809011

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Torsional Behavior of Annular Flat Contact Shaft Segment Attached with Torsion Pins

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- Torsional Behavior of Annular Flat Contact Shaft Segment Attached with Torsion Pins
- Vol. 52, Issue 9, Pages: 82-88(2018)
- 作者机构：
  
  1. 西安交通大学机械工程学院,西安,710049
  2. 西安交通大学机械结构强度与振动国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201809011
  CLC： TH113;TH117
- Online First：10 September 2018，
  
  Published：2018
- 稿件说明：
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Torsional Behavior of Annular Flat Contact Shaft Segment Attached with Torsion Pins[J]. 2018, 52(9): 82-88.
DOI：

Torsional Behavior of Annular Flat Contact Shaft Segment Attached with Torsion Pins[J]. 2018, 52(9): 82-88. DOI： 10.7652/xjtuxb201809011.

摘要

为了研究重型燃气轮机压气机转子中常用的带传扭销的环形平面接触轴段的扭转特性

提出了带传扭销的环形平面接触轴段扭转变形双线性解析模型。采用三维有限元数值计算

对理论模型进行了验证

并在此基础上分析了压紧力、摩擦因数、传扭销个数和传扭销直径等对该模型的两个线性段扭转刚度、双线性转折点扭矩和接触界面的传扭能力等关键参数的影响规律。研究结果表明

环形接触平面滑移前的扭转刚度和连续轴段的扭转刚度基本相同

环形接触平面滑移后的扭转刚度则由传扭销的纵向剪切刚度决定

而双线性转折点的扭矩与预应力和摩擦因数成正比。研究结果对工程应用中带传扭销环形平面接触界面的设计及重型燃气轮机转子扭转动力学分析具有参考价值。

Abstract

Annular flat contact interface attached with torsion pins is common in compressor rotors of heavy-duty gas turbine. To study the torsional behavior of annular flat contact shaft segment attached with torsion pins

a bilinear model of torsional deformation is proposed. Numerical calculation with three-dimensional finite element model is conducted to validate the theoretical model. Then

the effects of pre-stress

friction coefficient

number of pins and diameter of pin on the key parameters of the bilinear model

such as the torsional stiffness of two linear segments

the torque at the bilinear inflection point of two linear segments

and the torque loading capability of contact interface

are analyzed. The results show that the torsional stiffness before the slip of the annular contact interface is almost the same with that of continuous shaft section

however

after slip it is determined by the longitudinal shear stiffness of pins. In addition

the torque at the bilinear inflection point of two linear segments is proportional to the pre-stress and friction coefficient.

关键词

Keywords

references

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