Locking structure for wind tunnel fan blade

The invention relates to a locking structure for a wind tunnel fan blade. The locking structure comprises the blade (1), a blade handle, an eccentric sleeve I (3), a cushion block I (4), a bolt I (5), a propeller hub outer ring (7), a bolt II (8), a cushion block II (10) and an eccentric sleeve II (11). Tiny adjustment of the blade angle is achieved, the tolerance requirement of the installation angle of all the blades can be met, and the overall balance requirement of an overall wind tunnel fan is guaranteed. Meanwhile, the locking structure limits the freedom degree of the blade in the three-coordinate axis direction, part of centrifugal force of the blade is shared while the shimmy rigidity of the blade is improved, and the fan runs more safely and reliably. 本发明涉及一种风洞风扇叶片的锁紧结构，包括桨叶(1)、叶柄、偏心套Ⅰ(3)、垫块Ⅰ(4)、螺栓Ⅰ(5)、桨毂外环(7)、螺栓Ⅱ(8)、垫块Ⅱ(10)和偏心套Ⅱ(11)；本发明实现了桨叶角度的的微小调整，能够满足全部叶片安装角度的公差要求，保证了整体风洞风扇的整体平衡要求。同时，这种锁紧结构限制了桨叶三坐标轴方向的自由度，在提高桨叶的摆振刚度的同时分担了桨叶的部分离心力，使风扇的运行更加安全可靠。