ANGLE CHANGING DEVICE FOR WIND-TUNNEL MODEL

摘要

PROBLEM TO BE SOLVED: To set an object to be tested various position angles with excellent precision without backlashes and deteriorating strength with a single member, by changing engaging positions between the teeth shape of a fixed teeth fixed to the object to be tested and the teeth shape of an angle-changing teeth fixed to a support device. ;SOLUTION: A cylindrical fixed teeth 1 is provided in the blade root part of a fan blade 3, for example an object to be tested, and a teeth shape 4 is engraved along the outer margin. Further, a hollow part 6 is formed inside a support device (hub) 5 into which a blade part of the fan blade 3 is inserted, and a teeth shape 7 is engraved integral with an angle-changing teeth 2 which moves the hollow part 6 to a direction perpendicular to a direction of the teeth shape 4 of the fixed teeth 1, and is engaged with the teeth shape 4 of the fixed teeth 1. A screw groove is cut out in a hole behind the angle changed teeth 2 integrated in the hollow part 6. A push screw 8 inserted into this hole is moved by the screw groove, and engagement positions between the fixed teeth 1 and the respective teeth shapes 4, 7 of the angle-changing teeth 2 are changed, thereby, a position angle of the fan blade 3 to a direction of an air current F flowing in a wind-tunnel is set to be at a specified angle.;COPYRIGHT: (C)1998,JPO