Abstract
A significant amount of dust is released during the drilling process. It negatively affects the cleanliness and ecology of the surrounding space, as well as human health. The design of a local extraction nozzle is proposed for dedusting the process of drilling concrete with standard drills. A computer model of the dust-air flow in the developed nozzle is created in the software package SolidWorks Flow Simulation. The dynamics of dust particles formed during drilling is numerically studied. The behavior of dust particles of different sizes is considered. It is proposed to use the value of the maximum diameter of dust particles completely captured by the suction channel as a criterion for the efficiency of dust particle capture. Three variants of the drilling plane arrangement are considered: floor, ceiling and vertical wall. The dependences of the maximum diameter of dust particles on the intake air flow rate, the distance of the extraction channel on the side surface of the nozzle to the place of its abutment to the drilling plane, and the radius of the suction channel are determined. The results obtained can be used to design and improve systems for capturing dust pollution generated during drilling. The formulated further directions of research are useful for researchers engaged in identifying the processes of capturing dust particles from mobile technological equipment.
Highlights
The design of a local extraction nozzle is proposed for dedusting the process of drilling concrete with standard drills
A computer model of the dust-air flow in the developed nozzle is created in the software package SolidWorks Flow Simulation
The dynamics of dust particles formed during drilling is numerically studied
Summary
Доля частиц частиц РМ10 и РМ2,5 Dmax 22 %–37 % от массы частиц до 20,5–25 мкм Учитывая это, требуется использовать пылеудаляющую насадку, обеспечивающую достаточное для рабочей зоны качество воздуха – концентрация пыли должна быть не более ПДК. 2) подтверждают необходимость использования подобных насадок [19, 20] для улавливания пыли в процессе сверления. Применяемые насадки широко представлены на рынке сверлильных устройств Целью данной статьи является разработка конструкции отечественного пылеулавливающего насадка – местного отсоса для локализации пылевыделений при сверлильных работах и определения его рациональных режимно-технических характеристик. Шухова Среднее количество вдыхаемой пыли в зависимости от наличия МВО
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