Patent ID: 6086346
Filing Date: 2000-07-11
Classification: F01C

Abstract:
A cooling system for a rotary vane pumping machine having an intake end plate and an exhaust end plate, each being adjacent an axial side of a rotor located therebetween, the cooling system comprising:a first rotor cooling gas supply channel formed in the intake end plate;a second rotor cooling gas supply channel formed in the exhaust end plate;rotor heated gas channels formed in one of the intake end plate and exhaust end plate;a rotor face chamber formed at each axial face of the rotor confronting the respective intake and exhaust end plates, in flow communication with the respective first and second rotor cooling gas supply channels, wherein a rotor cooling gas enters the rotor face chamber at an entry radius proximal to an axis of rotation of the rotor; anda plurality of rotor gas channels spaced radially outward from the entry radius and radially inward from an outer circumferential surface of the rotor, and extending axially through the rotor to provide flow communication between the rotor face chambers formed at each axial face of the rotor, and wherein the rotor gas channels are in flow communication with the rotor heated gas channels;wherein the rotor cooling gas from the first rotor cooling gas supply channel enters the rotor face chamber at the entry radius proximal to the axis of rotation of the rotor, flows radially outward along the rotor face chamber toward the outer circumferential surface of the rotor, axially through the rotor gas channels, and exits axially through the rotor heated gas channels, andwherein the rotor cooling gas from the second rotor cooling gas supply channel enters the rotor face chamber at the entry radius proximal to the axis of rotation of the rotor, flows radially outward along the rotor face chamber toward the outer circumferential surface of the rotor, and exits axially through the rotor heated gas channels.