X-Mozilla-Keys:                                                                                 
Bill Freeman wrote:

Paul,

I like it, as long as the thrust  loaded direction will be working with the
belleville spring direction.  It will permit the thermal expansion
of the main housing without lousing up the preload.  It's elegant.
The issue is exactly how to find the right washer(s).  It might
require going to a spring maker and having some made.

You made one comment recently about beville washers that I think
is incorrect.  I believe that stacking them in opposition retains the
same spring constant as a single washer, but gains the travel equal
to the total number stacked.  Of course, stacking then nested
adds the spring constants and keeps the same travel.

Bill

Two identicle springs of any kind in series results in half 
the spring rate of each spring.

In other words for a given overall deflection each spring moves
half as far hence half the rate. Another example; A coil spring
which is really a bunch of torsion bars wound up in a circle.
Add  coils and the rate  goes down.

Paul Lamar
 
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