TURBINE OF TURBODRILL Russian patent published in 2010 - IPC E21B4/02 

FIELD: machine building.

SUBSTANCE: turbine of turbodrill includes stator containing blade ring with inner and outer diametres, rotor including blade ring with inner and outer diametres; at that, blades of stator and rotor rings have structural angles measured from the plane perpendicular to longitudinal axis of turbine to tangents to profiles of inlet blades (α₂ - stator and β₁ - rotor) and outlet blades (α₁ - stator and β₂ - rotor) of flow. Turbine blades are provided with structural angles alternating throughout their length at the stator outlet - α₁ and at rotor outlet β₂; at that, blade angles α₁ and β₂ at outer diametre of blade ring are smaller than the same angles at inner diametre of blade ring.

EFFECT: high efficiency.

2 cl, 3 dwg