Open AccessStress analysis of screw connection of key structural components in pump turbine
Author(s) -
Liu Chen,
Hailing Li,
Jiarui Yu,
Yongyao Luo,
Zhengwei Wang,
Xingbing Zhu,
Zhiwen Zhao,
Xiaokang Lu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/804/3/032037
Subject(s) - turbine , finite element method , ring (chemistry) , head (geology) , stress (linguistics) , cover (algebra) , structural engineering , key (lock) , connection (principal bundle) , mechanical engineering , joint (building) , engineering , unit (ring theory) , power (physics) , computer science , geology , mathematics , physics , linguistics , chemistry , philosophy , mathematics education , computer security , organic chemistry , quantum mechanics , geomorphology
In the structure of water pump turbine unit, the top cover and the seat ring structure are the key structural components, and the high-strength bolts distributed in the circumferential direction are usually used to connect. With the increase of the unit capacity and size, the number of connecting bolts is increasing gradually, so as to ensure the effective connection of key structural components. Taking a mixed flow pump turbine of a pumped storage power station as an example, the finite element calculation of the joint screw pair structure of the head cover and the seat ring is carried out under different working conditions. The stress distribution law of the screw pair is studied in this paper, which provides important theoretical basis and design reference for the practical engineering application of the head cover ring connection of the pump turbine.