With the lightweight design process of positive pressure respiratory protection equipment,the thickness of the mask was also reduced,so in the actual use process the air inlet flow generated by the air supply system would make the mask have deformation problems.In order to investigate the deformation resistance of different materials of respiratory protection masks,the deformation resistance of three materials,PP,PET and PVC,to the air inlet flow was investigated based on numerical simulation and experimental verification,and the effect of different ambient temperatures on the deformation of the mask was also analysed.The results showed that PP material was more influenced by the air inlet flow rate,followed by PVC,and PET deformation was the smallest;under the 380 L/min air inlet flow rate,the deformation of PP was about 3.7 mm,and the deformation of PET was about 1.6 mm;in addition,the deformation analysis of the three different materials under different ambient temperature conditions,PVC was more influenced by temperature,followed by PP,and PET deformation was the smallest.In addition,the deformation analysis of the three different materials under different ambient temperature conditions showed that PVC was more affected by temperature,PP was second and PET was the smallest.
关键词
正压呼吸面罩/流固耦合/抗变形/进气流量/环境温度
Key words
positive pressure breathing masks/fluid-solid coupling/resistance to deformation/air inlet flow/ambient temperature
维普
万方数据