Patent ID: 8192186
Filing Date: 2012-06-05
Classification: F04C

Abstract:
1. Rotor comprising: a shaft having an axial direction, a center extending in the axial direction, and first and second ends, wherein the first and second ends are arranged to be attachable to provide rotation of the shaft; an inner and central cooling channel arranged in the center of the shaft to extend in the axial direction of said shaft, wherein said inner and central cooling channel includes an inlet and an outlet at the first and second ends of the shaft configured to receive a cooling agent and arranged for circulating said cooling agent in the center of the shaft; and a tangential element positioned near the inlet of the inner and central cooling channel to provide a tangential component of velocity to the cooling agent when said cooling agent is received in the cooling channel; wherein the cooling channel includes inwardly directed fins, and wherein the tangential element comprises a star-shaped, profiled insert element having a conical end, wherein the conical end is directed away from the fins and arranged against a flow of said cooling agent when said cooling agent is received in the cooling channel.