The motor DE and NDE interfaces are

The motor DE and NDE interfaces are developed with the same concept. Considering the axialtoward of the cartridge insertion (Fig.1), these steps will be accomplished:1. at first, at the DE motor side, the two cylindrical surfaces will start to face each other (the cylindrical parts are designed to ensure clearance between shield and vessel). The function of those surfaces is to avoid a tilted insertion of the shield inside the pressure vessel fixing area (Fig.2): the 35mm axial length of cylindrical part ensures that the shield is axially parallel with the axial line defined bythe pressure vessel machined area;2. after the above mentioned alignment, the two conical surfaces of the DE side (shield and pressure vessel surface) will face each other;3. coming from the machining tolerances of the two conical surfaces the axial contact (Fig.3) point willbe defined within a range of +1.7mm / -0.0mm (the sign plus means closer to the compressor side, while the minus sign the opposite direction) – a 3mm machined pocket ensure the conical contact;4. after the contact has been established, the 4 fixing screws will be tight (Fig.4). The conical interface will force the two parts to reach a concentric relative position, in this way a full circumferential contact (stiff fixing) and a correct assembly position, are guaranteed;5. at this point the NDE conical surfaces (NDE shield and pressure vessel) will not be in contact yet(Fig.5): because of the positioning screws placed in the pins/slots flange (before the cartridge insertion) that freeze the axial relative position of NDE shield with respect of the Aluminium statorframe (Fig.6);6. to complete di insertion the positioning screws shall be removed (Fig.7), and by means of the external NDE flange, the two NDE conical surfaces are pushed in contact (Fig.8). During this operation the pins/slots coupling will guide the NDE shield insertion to the final position (Fig.9);7. also the NDE positioning tolerance has an axial range of 1.7mm, divided in +0.7mm / -1.0mm (with the same meaning of signs described in point 3).