摘要
针对空气阀内浮球吹堵问题,建立复合式高速进排气阀模型,设计了一种护筒高度为285,380,440 mm的空气阀,并对阀内湍流流场及其压力进行了模拟研究,计算了空气阀排气量及浮球升力,研究不同高度及进出口压差对空气阀的影响规律。结果表明,在排气过程中,3种护筒高度的空气阀不会发生吹堵现象,确保了空气阀安全运行;在相同高度下,排气压差与排气量成正比,随着高度增加,空气阀的节流通径变小。当压力为70000 Pa时,护筒高度为285 mm的空气阀最大压力为73093.25 Pa,相较于380 mm与440 mm压力增加了228.9,1230.37 Pa。排气压差为100000 Pa时,浮球在护筒高度为380 mm时,向下的力为1427.3 N。
In order to solve the blow blocking problem of the floating ball in the air valve,a composite high-speed intake and exhaust valve model was established,and the air valve with a protective sleeve height of 285,380 and 440 mm was designed.The turbulent flow field and its pressure in the valve were simulated and studied,and the air valve displacement and the lift of the floating ball were calculated,and the influences of different heights and inlet and outlet pressure differences on the air valve were studied.The results show that during the exhaust process,the air valves with three protective sleeve heights will not experience blow blocking phenomenon,thus ensuring the safe operation of the air valves;at the same height,the exhaust pressure difference is proportional to the exhaust volume,and as the height increases,the pitch diameter of the air valve becomes smaller.When the pressure is 70000 Pa,the maximum pressure of the air valve protective sleeve height of 285 mm is 73093.25 Pa,which is increased by 228.9 Pa and 1230.37 Pa compared to the pressure of the air valve with the sleeve height of 380 mm and 440 mm.When the exhaust pressure difference is 100000 Pa and the height of the protective sleeve is 380 mm,the downward force of the floating ball is 1427.3 N.
作者
彭枫
李志鹏
张程钞
廖志芳
王东福
谢科
PENG Feng;LI Zhipeng;ZHANG Chengchao;LIAO Zhifang;WANG Dongfu;XIE Ke(Changsha University of Science and Technology,Changsha 410004,China;BNSV Valve Group Limited Company,Tianjin 301802,China)
出处
《流体机械》
CSCD
北大核心
2022年第2期97-104,共8页
Fluid Machinery
基金
湖南省重点研发项目(2017KG2182)。
关键词
空气阀
流场
排气量
浮球升力
air valve
flow field
exhaust volume
float lift
