大型汽轮机油涡轮参数化设计模型与特征属性

润滑油系统是保证汽轮发电机组正常运行的重要组成部分,而油涡轮则是600 MW及其以上大容量机组润滑油系统的核心部件,目前国内大多采用技术图纸引进方式进行制造,而对其内部流动机理与设计方法研究较少.在分析油涡轮部件的基本结构与工作原理的基础上,通过借鉴径流式与冲动式涡轮的设计理论,提出了基于速度三角形与冲量定理建立的油涡轮基本原理模型、特征方程以及关键影响因素,利用经过精度验证的水力性能数值试验模型验证了其正确性,并以此为基础,建立了油涡轮的参数化设计模型,找出了油涡轮的固有属性,为油涡轮的设计提供了相关设计准则.

Large-capacity Steam Turbine Parametric Design Model and Characteristic Attributes of Oil Turbine

Oil system is an important part to ensure the normal operation of the unit. Oil turbine is the core components of oil system for large-capacity steam turbine group over 600MW. It was made currently through introducing technical drawings, but its internal flow mechanism and design method were few studied. Based on basic structure and operating principle of oil turbine components, reference to the design theory of radial and impulse turbine, the fundamental principle model of oil turbine was established by using velocity triangles and the impulse theorem. Its characteristic equation and key effect factors were presented, and it was verified through hydraulic performance numerical test model. On this basis, the parametric design model of the oil turbine was established. The intrinsic properties of oil turbine were found. Relative design principles were offered to oil turbine design.