公开(公告)号：US6022191A

公开(公告)日：2000-02-08

申请号：US80093

申请日：1998-05-15

申请人： R. David Moore ,  John D. Moore ,  Joseph Parker ,  John E. Dowell ,  Kenneth E. Jay ,  John P. Haynes

发明人： R. David Moore ,  John D. Moore ,  Joseph Parker ,  John E. Dowell ,  Kenneth E. Jay ,  John P. Haynes

IPC分类号： F04D29/34 ,  F01D5/30

CPC分类号： F04D29/34

摘要： A fan blade mounting system for large air-moving fans includes a radially extending hub strut, a blade root member pivotally coupled to an end of the hub strut for receiving a blade skin, and a tube end located between the blade root member and the hub strut. A pair of resilient mounts are utilized in the blade root member to effectively pivotally couple the blades to the hub, thus relieving most of the vertical bending moment transferred to the hub and eliminating critical frequencies associated with the fan. The hub strut is connected to the hub of the fan by a stud having right- and left-handed threads and a wall thickness adjacent to the threads sufficient for distributing the stresses substantially uniformly on the threads, thereby improving fatigue resistance. The resilient mounts comprise a metal core and metal sleeve with a resilient elastomeric layer between the core and sleeve. The sleeves are connected to the blade root member and the cores of the two mounts are clamped to the tube end.

摘要翻译： 用于大型气动风扇的风扇叶片安装系统包括径向延伸的轮毂支柱，可枢转地联接到轮毂支柱的端部以接收叶片皮肤的叶片根部构件，以及位于叶片根部构件和轮毂之间的管端 支撑。 叶片根部部件中使用一对弹性安装件，以有效地将叶片枢转地联接到轮毂，从而减轻转移到轮毂的大部分垂直弯矩并消除与风扇相关联的临界频率。 轮毂支柱通过具有右旋和左旋螺纹的螺柱和与螺纹相邻的壁厚连接到风扇的毂上，足以将应力基本均匀地分布在螺纹上，从而提高耐疲劳性。 弹性安装件包括金属芯和金属套筒，在芯和套筒之间具有弹性弹性体层。 套筒连接到叶片根部部件，两个安装座的芯部被夹紧到管端。