Resumen
Cooling system for slip rings (2) and brushes of electric machines, comprising a rotating shaft (3) configured to accommodate at least one slip ring (2) thereon, wherein the slip ring (2) comprises a brush holder assembly (1), the cooling system characterized in that the rotating shaft (3) comprises: - an axial bore (4) configured for the circulation of a cooling fluid, - a set of radial bores (5) located at least in a cross-section of the rotating shaft (3) configured to be longitudinally adjacent to at least one slip ring (2), the radial bores (5) being configured for communication between the axial bore (4) and the outside of the rotating shaft (3) for the flow of the cooling fluid from the axial bore (4) to the outside of the shaft (3), - a deflector element connected to the radial bores (5) of the rotating shaft (3) and configured to be longitudinally adjacent to at least one slip ring (2), configured for the orientation of the fluid Cooling towards the brush holders (1), - the deflector element comprises a static deflector ring (6), configured not to rotate with the rotating shaft (3), concentric to the rotating shaft (3) comprising radial holes (7) in fluid communication with the radial holes (5) of the rotating shaft (3), and in that the cooling system further comprises a cooling fluid drive element in communication with the axial hole (4). (Machine-translation by Google Translate, not legally binding)
Reivindicaciones
1. CLAIMS 1. Cooling system for slip rings (2) and brushes of electric machines, comprising a rotating shaft (3) configured for the location thereon of at least one slip ring (2), wherein the slip ring (2) comprises a brush holder assembly (1), the cooling system characterized in that the rotating shaft (3) comprises: - an axial orifice (4) configured for the circulation of a cooling fluid, - a set of radial holes (5) located at least in one cross-section of the rotating shaft (3) configured to be located longitudinally adjacent to at least one slip ring (2), the radial holes (5) being configured for communication of the axial hole (4) with the outside of the rotating shaft (3) for the flow of cooling fluid from the axial hole (4) to the outside of the shaft (3), - a deflector element in connection with the radial holes (5) of the rotating shaft (3) and configured to be located longitudinally adjacent to at least one slip ring (2), configured for the orientation of the cooling fluid towards the brush holders (1), - the deflector element comprises a static deflector ring (6), configured not to rotate with the rotating shaft (3), concentric to the rotating shaft (3) comprising radial holes (7) in fluid communication with the radial holes (5) of the rotating shaft (3), and because the cooling system also includes a cooling fluid pumping element in communication with the axial orifice (4). 2.- Cooling system for slip rings (2) and brushes of electric machines, according to claim 1, characterized in that the deflector ring (6) comprises as many radial holes (7) as the slip ring (2) has brush holders (1) and are configured for their location facing the brush holders (1). 3.- Cooling system for slip rings (2) and brushes of electric machines, according to claim 2, characterized in that the slip ring (2) is configured to comprise four brush holders (1) distributed at 90º and the deflector ring (6) comprises four radial holes (7) distributed at 90º. 4.- Cooling system for slip rings (2) and brushes of electric machines, according to any one of the preceding claims, characterized in that the rotating shaft (3) comprises more radial holes (5) than the deflector ring (6) has radial holes (7). 5. Cooling system for slip rings (2) and brushes of electric machines, according to any one of the preceding claims, characterized in that it comprises two deflector rings (6) each configured to be located adjacent to a face of a slip ring (2). 6.- Cooling system for slip rings (2) and brushes of electric machines, according to any one of the preceding claims, characterized in that the cooling fluid is air or refrigerant gas. 7.- Cooling system for slip rings (2) and brushes of electric machines, according to any one of the preceding claims, characterized in that the element for driving the coolant fluid is a fan. 8.- An electrical machine comprising a rotating shaft (3) and at least one slip ring (2) mounted on the rotating shaft (3), wherein the slip ring (2) comprises a brush holder assembly (1), characterized in that it comprises a cooling system according to any one of the preceding claims.
