风电起重维修平台夹紧机构的设计

The Design and Finite Element Analysis of Clamping Mechanism of Wind Turbine Crane

目的设计风电起重维修平台专用的夹紧机构,解决了风力发电机维修起重设备笨重及运输难的问题.方法在SolidWorks软件中建立了风电起重维修平台夹紧机构的三维模型,并将其导入到ANSYS workbench软件中.选定风电起重维修平台夹紧机构的顶杆伸出最长时,即风电起重维修平台夹紧机构位于风力发电机塔筒最上部时为分析工况,运用有限元分析技术对风电起重维修平台夹紧机构进行静力学性能分析.结果在选定的工况下,夹紧机构的最大挠度为16.1 mm,小于许用挠度;夹紧机构的最大应力为337.4 MPa,发生在耳板的下部与顶杆相连接的部位,耳板的材料为Q690,许用应力为492.9 MPa,大于其最大应力.夹紧臂的最大应力为227.4 MPa,小于其许用应力;顶杆的最大应力为308.4 MPa,小于其许用应力;顶杆导轨的最大应力为156.6 MPa,也小于其许用应力.结论验证了风电起重维修平台夹紧机构的刚度与强度均满足设计要求,对风机起重维修平台的设计提供理论依据,同时为维修平台研制打下基础.

The wind power lifting maintenance platform-specific clamping mechanism is designed to solve the wind generator maintenance lifting equipment bulky and difficulty transportation. The 3 D solid model of the wind turbine crane clamping mechanism is established in SolidWorks software and is imported ANSYS Workbench software. When the clamping mechanism＇s ejector pins held out the longest distance, the clam- ping mechanism located in the top of the wind turbine tower drum is selected as the analysis condition. The static mechanical properties of the clamping mechanism using the finite element analysis technology are ana- lyzed. Under the analysis condition,the clamping mechanism＇s max flexibility is 16. l mm,which is less than its permissible flexibility. The max stress of the clamping mechanism is 337.4 MPa. It occurred in connected place of the bottom of the ear plate and the ejector pins. The material of the ear plate is Q690. Its allowable stress is 492. 9 MPa which is greater than its max stress. The clamping arm＇s max stress is 227.4 MPa,which is less than its allowable stress 249.4 MPa. The ejector pins＇ max stress is 308.4 MPa,which is less than its allowable stress 492. 9 MPa. The ejector pins guide＇s max stress is 156.6 MPa,which is less than its allowa-ble stress 167.9 MPa. At last,the stiffness and strength of the clamping mechanism is verified that they meet the design requirements.