Study on dynamic characteristics of 50 kW double-turbine air floating rotor system

YANG Wei; ZHAI Xiaoyu; JIA Hua; WANG Yu; ZHANG Li; WU Yongpeng; LIU Yanjun

doi:10.19666/j.rlfd.202107121

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Study on dynamic characteristics of 50 kW double-turbine air floating rotor system

Thermal Power Generation Vol. 51, Issue 2, Pages: 65-70(2022)

更新时间：2025-05-30

- Study on dynamic characteristics of 50 kW double-turbine air floating rotor system
- 作者机构：
  
  1. 山东大学海洋研究院
  2. 山东大学机械工程学院高效洁净机械制造教育部重点实验室
  3. 南方海洋科学与工程广东省实验室,湛江
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202107121
  CLC： P743;TM612
- Published：2022
- 稿件说明：
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YANG Wei, ZHAI Xiaoyu, JIA Hua, et al. Study on dynamic characteristics of 50 kW double-turbine air floating rotor system[J]. Thermal Power Generation, 2022, 51(2): 65-70.
DOI：

YANG Wei, ZHAI Xiaoyu, JIA Hua, et al. Study on dynamic characteristics of 50 kW double-turbine air floating rotor system[J]. Thermal Power Generation, 2022, 51(2): 65-70. DOI： 10.19666/j.rlfd.202107121.

摘要

本文以海洋温差能发电为背景，设计了以气体轴承为支撑的50 kW双透平转子系统。应用ANSYS分析软件，对50k W双透平转子系统进行动力学仿真计算分析，首先采用模态分析法求得了转子系统各阶临界转速及固有频率；其次，基于模态分析进行谐响应分析，得到叶轮径向幅频特性曲线，验证了转子系统能保持稳定运行；最后，对叶轮进行了离心应力分析。结果表明：双透平转子系统的临界转速为16 241.0 r/min，设计的工作转速符合安全裕度；系统在受到外界激振力时叶轮不会与喷嘴发生碰撞；叶轮的最大变形发生在叶尖处，且从叶片顶部到根部逐渐减小，最大应力发生在叶片顶端靠近轴孔的根部，叶轮在工作时不会损坏叶片。研究结果可为双透平试验与结构优化提供一定的理论依据。

Abstract

Taking the marine temperature difference energy power generation as the background

a 50 kW doubleturbine rotor system supported by gas bearings is designed. Moreover

by using ANSYS software

dynamics simulation calculation analysis on this system is carried out. Firstly

the modal analysis method is used to obtain the critical speed and natural frequency of the rotor system. Secondly

the harmonic response analysis is performed based on the modal analysis. The radial amplitude-frequency characteristic curve of the impeller is obtained and verifies that the rotor system can maintain stable operation. Finally

the centrifugal stress analysis of the impeller is carried out. The results show that

the critical speed of the dual-turbine rotor system is 16 241.0 r/min

and the designed operating speed meets the safety margin. The impeller will not collide with the nozzle when the system is subjected to external excitation force. The maximum deformation of the impeller appears at the tip of the blade

and gradually reduces from the top of the blade to the root. The maximum stress appears at the tip of the blade near the root of the shaft hole. The blades will not be damaged during working. The research results can provide certain theoretical basis for the test and structural optimization of dual-turbines.

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