模压工艺对风电叶片再生板材性能的影响研究

Study on the Influence of Molding Process on the Regenerated Plate Properties of Wind Turbine Blades

随着风电行业的快速发展,我国退役风电叶片数量持续增长,其回收利用已成为制约风电行业可持续发展的瓶颈之一。试验采用粉碎系统对退役风电叶片进行处理,然后利用模压工艺将其与高密度聚乙烯复合,制备再生板材。其间通过响应曲面设计,研究混料温度、模压温度、模压压力和保压时间对再生板材力学性能的影响,并采用拉伸强度、弯曲强度和压缩强度作为再生板材力学性能的评价指标,通过最小二乘法分析制备工艺对再生板材力学性能的影响,得到最优模压工艺的制备参数,为再生板材生产推广奠定工艺基础。试验结果表明,模压工艺参数较优时,混料温度为89.03 ℃,模压温度为182.5 ℃,模压压力为22.82 MPa,保压时间为8.09 min。在此工艺条件下,制备的再生板材拉伸强度为20.01 MPa,弯曲强度为39.15 MPa,压缩强度为34.73 MPa。

With the rapid development of the wind power industry,the number of retired wind turbine blades in China continues to grow,and their recycling has become one of the bottlenecks restricting the sustainable development of the wind power industry.The experiment uses a crushing system to process retired wind turbine blades,and then uses molding process to composite them with high-density polyethylene to prepare regenerated plates.During this process,the effects of mixing temperature,molding temperature,molding pressure,and holding time on the mechanical properties of regenerated plates are studied through response surface design,and the tensile strength,flexural strength,and compressive strength are used as evaluation indicators for the mechanical properties of regenerated plates,by using the least squares method to analyze the influence of preparation process on the mechanical properties of regenerated plates,the optimal preparation parameters for the molding process are obtained,laying the technological foundation for the promotion of regenerated plate production.The experimental results show that when the molding process parameters are optimal,the mixing temperature is 89.03℃,the molding temperature is 182.5℃,the molding pressure is 22.82 MPa,and the holding time is 8.09 min.Under these process conditions,the prepared regenerated plates have a tensile strength of 20.01 MPa,a bending strength of 39.15 MPa,and a compressive strength of 34.73 MPa.