SCHUNK ROTA EP 380-127, Assembly And Operating Manual, Page: 44 / 73

Function
44 02.00|0889073_ROTA TB-TBS-EP |en
Function
The item numbers specified for the corresponding individual
components relate to chapter drawings. (

16, Page 64)
Principle of Operation
The problem of air supply was solved by a stationary distributor
ring with profile ring seals arranged therein. Openings in the two
elastic radially deformable profile seals allow the compressed air
to flow through a non-return valve to one of the two pressure
chambers. The pilot controlled non-return valve controls the
feeding to one pressure chamber and the simultaneous forced
ventilation of the second pressure chamber. This triggers the
piston stroke and the base jaws are moved by the wedge hook.
The valve system blocks and stores the pressure in the chuck body
while the profile seals, due to their elasticity, are raised from the
chuck body by the ventilation of the supply lines and therefore are
not subject to wear from the rotating chuck.
Air transmission system
Air transfer takes place only when the headstock spindle is at a
standstill, via profile seals provided radially in the distributor ring.
The profile seal is designed so that the outer upper section of the
surface is larger than the surface of the openings. Upon
pressurization the difference in surface area exerts a radial force
on the profile seal in the ring-shaped chamber of the distributor
ring, resulting in optimal static sealing of the profile seal at the air
8
8.1
8.2