排灌机械工程学报2012，Vol.30Issue(3)：346-350,5.DOI:10.3969/j.issn.1674-8530.2012.03.019
倒吊桶先导式蒸汽疏水阀的设计与数值模拟
Design and numerical simulation of inverted bucket pilot-operated steam traps
摘要
Abstract
Since the pilot-operated steam trap is subject to a high level of noise and a poor bearing capacity of pressure when it is operated under high temperature, high pressure and high flow rate condition , a new type pilot-operated stream trap, which is in shape of inverted bucket and is applicable for ultra-high flow rate, was designed and developed in the paper. A Mathematical model was set up for the valve, and a two-stage throttle sleeve muffler was designed according to the throttling principles of flow. A numerical simulation of three-dimensional, turbulent flow in the valve was conducted by using the CFD code Fluent based on Reynolds time-averaged N - S equations, the SIMPLEC scheme and the standard k -e turbulence model. The results show that the maximum pressure, that the pilol valve can bear, is increased to more than 10 MPa from 6. 3 MPa, the maximum working pressure of the pilot-operated steam trap is 8 MPa and its mass flow rate is as high as 30 t/h. By comparison and analysis, it is obtained that the internal flow field in the inverted bucket pilot-operated valve with a muffler is more uniform and the pressure is changed gradually; in consequence, cavitation is avoided effectively. The maximum pressure drop is decreased to 190. 8 kPa from 247.7 kPa; accordingly, the total pressure drop is increased by 165. 6 kPa and the pressure drop ratio rise to 0. 56 from 0. 18, further the level of noise is lowered by 33 dB( A). As a result, the result in the paper can provide a reference forthe design of inverted bucket pilot-operated steam trap.关键词
倒吊桶先导式蒸汽疏水阀/超大排量/承压能力/消声器/流场/数值模拟Key words
inverted bucket pilot-operated steam trap/ ultra-high flow rate/ bearing capacity of pres-sure/ muffler/ flow field/ numerical simulation分类
农业科技引用本文复制引用
李树勋,徐登伟,李确,王朝富..倒吊桶先导式蒸汽疏水阀的设计与数值模拟[J].排灌机械工程学报,2012,30(3):346-350,5.基金项目
科技部科技人员服务企业行动项目(2009GJG10005) （2009GJG10005）
兰州理工大学"优秀青年教师培养计划"项目(Q201002) （Q201002）
