低压汽轮机电液调节系统内部流道阻力研究  

Research of Internal Flow Resistance of Low-Pressure Steam Turbine Electro-Hydraulic Regulating System

作　　者：高军霞[1] 吴凤和[2] 唐军 GAO Junxia;WU Fenghe;TANG Jun(Key Lab of Intelligent Equipment Digital Design and Process Simulation,Tangshan University,Tangshan Hebei 063000,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao Hebei 066004,China;Shanghai Electric Power Generation Equipment Co.,Ltd.,Shanghai 200240,China)

机构地区：[1]唐山学院河北省智能装备数字化设计及过程仿真重点实验室,河北唐山063000 [2]燕山大学机械工程学院,河北秦皇岛066004 [3]上海电气电站设备有限公司,上海200240

出　　处：《机床与液压》2023年第10期35-41,共7页Machine Tool & Hydraulics

基　　金：河北省重点研发计划项目(20327407D);唐山市人才资助项目(A202002031);唐山市科技计划项目(22130211G,22130207G)。

摘　　要：低压汽轮机电液调节系统中的保安集成块内部流道阻力直接影响到先导油压的动态泄压品质。通过CFD仿真分析了保安集成块内部的三种π形流道模块单元、T形正交与非正交流道模块单元以及直角交叉兼具突扩特征的流道模块单元的流动机制,对比各自的流量-压力损失特性,提出一种简易预测集成块复杂流道阻力的方法。结果表明:在直角转弯流道中,适当增大液流流动的曲率半径,可减小压力损失;同等流量下,直角交叉兼突扩特征的流道模块单元压力损失最大。The dynamic pressure relief quality of the pilot oil pressure directly depends on the resistance of the internal flow channel of the security manifold in the electro-hydraulic regulating system of low-pressure steam turbine.The flow field characteristics of threeπchannel module units,T-type orthogonal and non-orthogonal channel module units and right angle crossing and sudden expansion characteristics channel module unit in security manifold were analyzed by CFD simulation,and flow-pressure loss characteristics were compared,a simple method for predicting the complex channel resistance in manifold block was proposed.It is shown that the pressure loss can be reduced by appropriately increasing the curvature radius of the liquid flow in the right angle turning channel;under the same flow rate,the pressure loss of the channel module unit with the characteristics of right angle crossing and sudden expansion is the largest.

关 键 词：汽轮机 电液调节系统 保安集成块 流道阻力 阻力预测 

分 类 号：TH137[机械工程—机械制造及自动化] TK26[动力工程及工程热物理—动力机械及工程]