Patent ID: 9692262
Date: 2017-06-27
CPC Classifications: H02K

Claim:
1. A support structure for the stator of a rotating electrical machine comprising: an external support frame located outside of the stator and comprising annular structural members, a cylindrical outer housing and annular end plates, wherein each axial end of the stator is indirectly connected to the annular structural members at separate mounting locations equally spaced around a circumference of the stator; at least one pair of sandwich anti-vibration mounts disposed at each mounting location axially inward of the annular structural members, and each including a plurality of layers sandwiched together wherein the plurality of layers includes elastomeric layers interleaved with rigid plates, the at least one pair is located between the external support frame and a part of the stator such that the at least one sandwich anti-vibration mount experiences compression loading in a substantially tangential direction of the stator and radial shear loading in a substantially radial direction of the stator during operation of the rotating electrical machine, wherein the compression loading applied during the operation of the rotating electric machine includes a combination of static compression loads and dynamic compression loads and the sandwich anti-vibration mount having a compression axis, wherein one sandwich anti-vibration mount of the at least one pair experiences a torque-load when a rotor of the rotating electric machine rotates in one direction and the other sandwich anti-vibration mount of the at least one pair experiences a torque-load when the rotor of the rotating electric machine rotates in the opposite direction, and wherein the layers are further compressed when the compression load applied is greater than the static compression loads, and uncompressed when the compression load applied is less than the static compression loads such that the elastomeric layers in one sandwich anti-vibration mount of the at least one pair are compressed while the elastomeric layers in the other sandwich anti-vibration mount of the at least one pair are uncompressed; wherein each sandwich anti-vibration mount has a stiffness characteristic for compression loading Kc and a stiffness characteristic for radial shear loading Krs; and wherein each sandwich anti-vibration mount is pre-loaded with a predetermined compression load including a static compression load applied substantially along the sandwich anti-vibration mount's compression axis.