Study On Dust Removal Performance Of Dust Cover For Wind Turbine Blade Grinding Robot

With the country strongly advocating the development of renewable energy,the share of wind power in China's energy structure has been increasing,and the manufacture of wind turbine blades has also increased.As a key component of a wind turbine,wind turbine blades cost about one quarter of the total cost of the turbine.Since the material of the blade is mainly a glass fiber epoxy resin,a large amount of dust is generated when it is polished.Dust will not only pollute the working space,endanger the health of the workers,but also affect the processing accuracy and service life of the grinding robot.Therefore,it is of great significance to perform dust removal while grinding wind turbine blades.In the research of dust removal devices,there are many researches and inputs for dust collectors,and there are few studies on dust catcher capture devices.Due to the complexity and diversity of the flow field inside the dust cap,no systematic theory has been developed for the dust cap.In this paper,the end of the dust removal device for the wind turbine blade grinding robot as the research object,using a combination of theoretical analysis and numerical simulation method,using the gas-solid two-phase flow theory to study the interior flow field of the dust cover,analysis of the dust cover structure parameters of the internal flow field Impact,the dust cover structure is optimized.Firstly,according to the turbulent flow characteristics of the gas-solid two-phase flow at the grinding point,the force of the dust particles in the airflow is analyzed,and the equation of motion of the single-particle dust is established.The movement characteristics of dust particles with different particle sizes were analyzed to study the movement characteristics of dust particles under the action of gravity and air resistance,and the suspension speed,movement time and movement distance of dust particles with different particle sizes were obtained.Second,a three-dimensional simplified solid model of the dust cover of the wind power blade grinding robot was established,and the gas flow field inside the dust cover was numerically simulated.Using the stochastic orbit model coupled with gas-solid two-phase,the distribution and movement of dust particles inside the dust cover were studied by Euler-Lagrangian simulation method.The influence of particle parameters on the dust removal performance of the dust cover was studied.The dust particle size increased from 40?m to 120?m,the capture efficiency decreased from 90.57%to 78.25%,and the dust particle concentration increased from 100g/m~3 to 600 g/m~3.The collection efficiency decreased from 88.25%to 84.21%.Finally,based on the study of the gas flow field inside the dust cover,the structural parameters of the dust cover are changed respectively,and the influence of the dust cover on the internal flow field is analyzed.The dust cover model was established and numerical simulation was carried out.The gas flow field and particle flow field were analyzed to verify the dust cover optimization model.The dust collection cover collection efficiency under different particle size and particle concentration was analyzed.The capture efficiency was increased by 6.5%compared with that before,and the dust cover optimization model was further verified.