基于静压箱分流原理的环吸式排风罩结构设计及减阻优化
Structural design and resistance reduction optimization of a ring suction exhaust hood based on static pressure box diversion principle
摘要：
在有色金属压延加工过程中,油雾散发源的几何非对称性导致近源处污染物呈现非均匀分布的特点,排风罩各侧风口应实现风量按需分配,以满足污染物高效捕集的要求。本文基于静压箱分流原理,提出了双层分区双环吸式排风罩。模拟结果表明,相对于优化前,双层分区双环吸式排风罩的风口风量偏差率下降了32.04%,结构阻力降低了21.93%,油雾逃逸降低率为20.79%。此外,本文还从经济性角度分析了双层分区双环吸式排风罩结构优化的合理性,为排风罩结构设计及减阻优化提供参考。
Abstract：
In the process of non-ferrous metal rolling,the geometric asymmetry of the oil mist emission source leads to a non-uniform distribution of pollutants near the source.The air volume of each side air outlet of the exhaust hood should be allocated according to the need to meet the requirements of efficient pollutant capture.In this paper,based on the principle of static pressure box diversion,a double-layer partitioned double-ring suction exhaust hood is proposed.The simulation results show that the air volume deviation rate at the air outlet of the double-layer partitioned double-ring suction exhaust hood decreases by 32.04% compared with that before optimization,the structural resistance decreases by 21.93%,and the oil mist escape reduction rate is 20.79%.In addition,this paper analyses the rationality of the structural optimization of the double-layer partitioned double-ring suction exhaust hood from an economic perspective,and it can provide references to the structural design of the exhaust hood and the resistance reduction optimization.
Keywords:static pressure box; oil mist; non-uniform distribution; airflow on-demand distribution; double-layer partitioned double-ring suction exhaust hood; structural optimization design; resistance reduction