초록 ▼

A variable stator vane includes an airfoil having a threaded stem, a lever having a mounting hole receiving the stem, and a nut threadingly engaging the stem to retain the lever on the airfoil. A clearance is provided between the seat and lever during alignment therebetween to provide sufficient thr

A variable stator vane includes an airfoil having a threaded stem, a lever having a mounting hole receiving the stem, and a nut threadingly engaging the stem to retain the lever on the airfoil. A clearance is provided between the seat and lever during alignment therebetween to provide sufficient thread overlap between the nut and stem to permit engagement therebetween, with insufficient thread overlap being provided during misalignment to prevent threaded engagement therebetween.

대표청구항 ▼

[ I claim:] [1.] A mismatch proof variable stator vane comprising:an airfoil having a threaded stem;a lever having a mounting hole receiving said stem;a nut threadingly engaging said stem to retain said lever on said airfoil; andmeans for providing insufficient thread overlap between said nut and st

[ I claim:] [1.] A mismatch proof variable stator vane comprising:an airfoil having a threaded stem;a lever having a mounting hole receiving said stem;a nut threadingly engaging said stem to retain said lever on said airfoil; andmeans for providing insufficient thread overlap between said nut and stem to prevent threaded engagement therebetween during misalignment of said lever and vane, and for also providing sufficient thread overlap between said nut and stem to permit threaded engagement therebetween during alignment of said lever and vane. [9.] A method of preventing mismatched engagement of a nut-retained lever atop a threaded stem of a variable stator vane comprising:providing insufficient thread overlap between said nut and stem to prevent threaded engagement during misalignment of said lever and vane; andproviding sufficient thread overlap between said nut and stem to permit threaded engagement therebetween during alignment of said lever and vane. A method according to claim 9 further comprising:providing a unidirectional seat below said stem, and a complementary mounting hole in said lever alignable solely in one matched direction; andproviding clearance between said seat and lever during said alignment relative to said misalignment for permitting at least partial threaded engagement of said stem and nut.