摘要
Abstract
Given the limited research on the stiffness performance of turbine exhaust cylinders,the stiffness characteristics of a turbine exhaust cylinder using finite element analysis and prototype testing is investigated.A mechanical model of the exhaust cylinder is established using CATIA 3D software,by employing the finite element method,the deformation of the exhaust cylinder is simulated and calculated under vertical loads of 160,360,and 760 kN.Under the 160 kN working condition,the displacement at the bearing seat connection of the exhaust cylinder is approximately3.69×10-2 mm,and its static stiffness is determined to be4.33×106 N/mm,which meets the safety operating requirements of the unit.A test prototype is manufactured,and loads are applied at the exhaust port using a hydraulic device.The study shows that under static load,the displacement change of the exhaust cylinder is primarily concentrated at the middle of the exhaust port and the connection point of the rear bearing seat,exhibiting a linear variation with increasing load.The displacement changes become more pronounced closer to the exhaust port.The vertical displacement of the flange connecting the rear bearing seat of the lower cylinder is a crucial factor affecting the static stiffness of the exhaust cylinder.The results of the finite element analysis are generally consistent with the experimental results,indicating that numerical analysis methods can be used as important tools for the design and optimization of exhaust cylinders during their development process,ensuring their safety and reliability.关键词
汽轮机/排汽缸/有限元/静刚性/试验Key words
steam turbine/exhaust cylinder/finite element/static stiffness/testing分类
能源科技
