The connection of a hollow shaft, for example from a hydraulic motor or a gearbox, to a shaft is today often donewith a mechanical shrink disc.These are built up of conical rings.When mounting a high radial force is neededto compress both the conical rings and the hollow shaft.This is achieved through a lot of screws with a high tightening torque.Mounting/dismantling causes long downtime which is expensive in the process industry forexample in the pulp and paper industry.ETP–IMPRESS is a shrink connection where the mounting and dismantling is done easily and quickly throughhydraulic pressure.

CONSTRUCTION

•Mounting/dismantling is done quickly, easily and accurately.•Can be mounted/dis-mantled a great num- ber of times without servicing.•Can be mounted in tight spaces.•Is possible to dismantle without hydraulic.•Approx.same built-in dimensions as mecha- nical joints.•Direct relation between hydraulic pressure and transmittable torque.•No large screws with high tightening torque for mounting, which have a high-risk brea- king. ETP-IMPRESS consists of two flange parts and an inner slee- ve with two or more conical surfaces, connections for hydraulicare both radial (RC) and axial (AC), locking screws (LS), dis- mantling screws (DS) and professional seals.
DSRCACLS

OPERATION

The sealed chamber between the flanges is pressurised with a supplier of hydraulic pump.The pressure makes the flanges move apart in the axial direction, the conical surfaces will then professional press the inner sleeve uniformly against the hollow shaft.The hollow shaft will be compressed and engage the solid shaft.A surface pressure will be built up between the hollow shaft and the solid shaft.When the mounting pressure is reached the axial locking screws are tightened.The hydraulic pressure is released;the flanges will stay in position supported by the locking screws.The connection is ready.When dismantling, the joint is pressurized;the locking screws loosened, the pressure released and the connection is free. Because of the friction resistance around the seals it may be necessary to use the radial dismantling screws for loosening ETP-IMPRESS from the hollow shaft. Mounting is done in a coupleof minutes with hydraulic, evenon large hollow industrial shafts.Dismantling is as quick.

QUALITIES

The unique hydraulic principle gives a great number of advan- tages. 22