Abstract: Provided is a mounting arrangement for mounting a stator frame of a rotating electrical machine on a stationary foundation. The stator frame includes a stator foot adapted to support the stator frame on the foundation. The stator foot has a lower surface that faces an upper surface of the foundation, and an upper surface. The mounting arrangement includes a lubricant positioned between the lower surface of the stator foot and the upper surface of the foundation. The mounting arrangement is adapted to allow the stator foot to move in a lateral and/or axial direction relative to the foundation to accommodate thermal expansion of the stator frame in use.

Abstract: A rotating electrical machine such as a generator has a rotor disposed within a rotor housing and an air flow path passing from the rotor housing to and through a silencer to an exhaust. The silencer comprises at least one air flow path disposed adjacent at least one sound absorbing column, the column comprising a first portion having a first sound absorbing material therein and a second portion having a microperforated panel (MPP) and a resonator cavity. The second portion comprises a reactive sound absorbing unit which can be specifically tuned to suppress aero-acoustic noise generated by ventilation slots in the rotor, typically peaks at 100 Hz or 120 Hz.

Abstract: A rotating electrical machine such as a generator has a rotor disposed within a rotor housing and an air flow path passing from the rotor housing to and through a silencer to an exhaust. The silencer comprises at least one air flow path disposed adjacent at least one sound absorbing column, the column comprising a first portion having a first sound absorbing material therein and a second portion having a microperforated panel (MPP) and a resonator cavity. The second portion comprises a reactive sound absorbing unit which can be specifically tuned to suppress aero-acoustic noise generated by ventilation slots in the rotor, typically peaks at 100 Hz or 120 Hz.