Thursday, May 17, 2012

Steel Frame

Here is a picture of the steel work. The horizontal "rectangular" section on the left is where the hub will be mounted. The centre round pipe (yaw tube) is welded to a piece of angle iron in front of it. The angled section is offset backwards by 4 degrees, slightly tilting the blades back, increasing the distance between the blade tips and the tower. The tube on the right is for the tail boom. It too is offset from the yaw tube, but this time it's to the right. The offset between the hub, tail boom and the rotational centre (yaw tube) allow the turbine to "furl" itself when the winds get strong. This furling allows the turbine to bend in the middle (lower picture), effectively turning the blades away from the wind preventing damage from over speeding blades.



 

This image gives a good idea of the rear leaning tilt of the generator frame section. It also shows the rear tilt of the boom pivot.

All threaded hardware is 1/2" 304 stainless steel. If this turbine was intended for a coastal site it would have been built with 314 stainless in order to better handle damp salt air.


Below is a picture of the threaded hardware contents for this unit. The four long bolts are for the generator/hub assembly, three shorter bolts are the stator mounts and the four small bolts are for the bearing hub to frame mount. Before the final tightening each threaded piece has a liberal drop of thread locker applied to it.


1 comment:

  1. Very useful information, thanks for posting. I have noticed that I have been following your website for a long time now, and I am quite impressed with the dedication you show towards your work, and hope many more turbines will be put up in the future

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