工业缝纫机气浮针杆的柔性联接装置

由于滑槽座导轨副的配合间隙等原因的存在，使得通过刚性连接柱传给工业缝纫机针杆的作用力造成其运动方 向偏移。设计了一种工业缝纫机气浮针杆的柔性联接装置，采用柔性铰链弹性变形产生微小角位移来非平行输出微位 移，用以减弱滑决受到刚性干扰传递给针杆而造成的运动影响，运用ANSYS对其变形及强度进行了校核与分析。结果 表明：ANSYS分析结果与理论设计计算对比验证了设计结构与强度的合理性；该柔性联接装置结构简单，定位精度高， 可以有效地解决刚性传递的干扰，实现精密微位移定位，为今后精密微位移机构的研究提供了很好的研究方法和指导。

Effects of Decreasing Inlet Flow Angle on Performances of High-Pressure Axial-Flow Fans

Because of guide chute reasons such as the existence of fit clearance. the column to the rigid connection of industrial sewing machine needle bar forces cause its movement direction deviation. A kind of flexible connecting device of floating needle bar of industrial sewing machine was designed. The flexible hinge elastic deformation which produced tiny angular displacement to the parallel output displacement was used to weaken the movement influence of the slider that got rigidity disturbance to the needle bar. The ANSYS was used to check and analysis the deformation and the strength. The results show that the calculation comparison of the ANSYS analysis results and the theoretical design have verified the rationality of the structure and strength design. The flexible connecting device has the advantages of simple structure, high positioning accuracy, and it can effectively solve the problem of rigid transmission interference to achieve the precision positioning and micro displacement precision. It provides a good research method and guidance for the future research of micro displacement mechamsm.