METHOD AND APPARATUS FOR ACCOMPLISHING GAS-FLOW INTO THE GAP BETWEEN STATOR AND ROTOR OF AN ELECTRIC MACHINE

摘要

The invention relates to a method for accomplishing a gas flow into the gap (8) between the stator and the rotor of an electric machine. The gas, advantageoulsy at least partly air, is pre-accelerated before entering the gap (8) and the gas is conveyed to the gap (8) substantially at a flow rate corresponding to the pre-acceleration. The pre-acceleration is carried out advantageously to a rate that is substantially half the peripheral speed of the rotor (1) and substantially in the tangential direction of the periphery of the rotor (1). The invention relates also to an apparatus for applying the method.