I recently installed a wind generator on my radar
arch and whilst it is really quiet on deck it is decidedly not when down below in our aft cabin. So I decided to make a vibration absorber to reduce the noise. Thought I would share that with the forum.
The raw materials look like this:
Two stainless tubes, the little one fits the insert of the wind gen, a piece of "soft" polyurethane (red) and a piece of hard acetyl plastic (grey). The polyurethane is to absorb the vibration, the acetyl is to provide anti-crush properties to the piece where the bolts hold the assembly onto the arch.
The two inserts are machined to a press fit into the outer sleeve. This is the soft part pressed in on a hydraulic press and then bored, the hard part is the same on the other end with a 20mm gap between.
Then the two inserts are machined, the red sleeve to the same press fit for the inner tube and the grey to a snug slide fit for easier installation to the arch. The inner tube is pressed into the red sleeve on the press (sorry I couldn't get the image to stay "rotated").
The lower part is drilled to take three bolts into the arch pipe (not shown here) and nuts are glued into the arch pipe to take the bolts.
For those interested, this is the machine I have to do this stuff.
For those who have the same vibration problem, if you can't do this yourself, get a mate to help or something - it's worth the effort.