Patent ID: 7513739
Filing Date: 2009-04-07
Classification: F01D,F05D

Abstract:
1. A moving blade for a turbomachine, the blade being characterized in that its central portion (C) includes a pressure-side cooling circuit and a suction-side cooling circuit, said pressure-side cooling circuit comprising: at least first and second pressure-side cavities extending radially and in the thickness direction of the blade from the pressure side of the blade to a central wall extending radially and along the skeleton direction of the blade; a central cavity extending radially and in the thickness direction of the blade from the pressure side to the suction side of the blade; an air admission opening at one radial end of the first pressure-side cavity for feeding the pressure-side circuit with air; a first passage causing the other radial end of the first pressure-side cavity to communicate with a neighboring radial end of the second pressure-side cavity; a second passage causing the other radial end of the second pressure-side cavity to communicate with a neighboring radial end of the central cavity; and outlet orifices opening out from the central cavity and into a pressure-side face of the blade; the suction-side cooling circuit comprising: at least first and second suction-side cavities extending radially and in the thickness direction of the blade from the suction side of the blade to said central wall; a central cavity extending radially and in the thickness direction of the blade from the pressure side to the suction side of the blade; an air admission opening at one radial end of the first suction-side cavity to feed the suction-side circuit with air; a first passage causing the other radial end of the first suction-side cavity to communicate with a neighboring radial end of the second suction-side cavity; a second passage causing the other radial end of the second suction-side cavity to communicate with a neighboring radial end of the central cavity; and outlet orifices opening out from the central cavity and into the pressure-side face of the blade.