Cooling vibration exciter apparatus

A vibration exciter apparatus configured, in use, to impose a vibration regime to vibration processing or handling equipment, said vibration exciter apparatus comprising:

• an exciter housing;
• at least one bearing means, the at least one bearing means being operationally mounted in an internal zone of said exciter housing to be, in use, in/at least partial contact with liquid lubricant in a liquid lubricant sump zone with said at least one bearing means being lubricated by liquid lubricant from the liquid lubricant sump zone, the at least one bearing means supporting a driven shaft carrying eccentric mass means externally of said exciter housing;
• and
• cooling means arranged to receive heat from the at least one bearing means and/or said liquid lubricant in said liquid lubricant sump zone and to convey said heat at least partially to a position externally of said exciter housing, wherein the cooling means is positioned to receive heat from each the at least one bearing means, wherein the vibration exciter apparatus includes two spaced said driven shafts, each being supported by the at least one bearing means, and wherein each said bearing means is positioned in a separate the liquid lubricant sump means located within the internal zone of the exciter housing.