COOLING ARRANGEMENT FOR AN ACCESSORY GEARBOX AND METHOD OF COOLING

摘要

The housing or box enclosing the gearing which is used to transmit power to various accessories (AGB) (30) serviced by a gas turbine requires cooling. The invention provides cooling to the accessory (20) externally without the need for any coolant flow inside the accessory (20). This is done by using the accessory gearbox (AGB) (30) as the outer boundary of a cylindrical cooling jacket with the inner boundary being on or in the exterior surface of the accessory. A coolant then flows from an inlet on the AGB (30) through the cooling jacket, to an outlet on the AGB (30). The coolant may then be sent to other heat exchangers or elements of the system. This eliminates the need for internal coolant/lubrication passages in the accessory (20).