SKF oil injection method applied
to flexible shaft couplings
By combining the principle of SKF oil injection
method on flexible shaft couplings, a high torque interference fit for plain,
cylindrical shafts is obtained.
Since there is no need for machining any
keyways, splines or tapered shafts, smaller shaft diameters can be used, thus less
Mounting and dismounting are fast and
easy with no external tools except a pump set.
The coupling works on the same principle
as the SKF OK couplings, i.e. a thicker outer
sleeve (in this case the flex coupling hub) with
an internal taper is driven up on a thin, externally
tapered inner sleeve. Oil is then injected
between the sleeves in order to virtually eliminate
friction between the tapered surfaces. For more information, refer to the section "OK couplings".
The couplings then have an inbuilt hydraulic
unit which creates an oil pressure thus driving
up the flex hub on the inner sleeve.