TURBINE BUCKET (VERSIONS) AND ROTOR Russian patent published in 2015 - IPC F01D5/22 

FIELD: machine building.

SUBSTANCE: turbine bucket comprises an elongated blade, a base and a shroud element. The base is located at the elongated blade end being closer to the fastening point and includes a flat element, a projection and an element for slip joint. The flat element is set perpendicular to the longitudinal axis of the elongated blade. The projection is provided on the back surface of the flat element and gives support for the part of the elongated blade passing beyond the flat element due to twisted blade configuration. The element for slip joint is set on the flat element surface being opposite to the elongated blade, closer to the element's front surface. The shroud element is set at the peripheral end of the elongated blade perpendicular to its longitudinal axis and has back and front surfaces with their shapes being complementary to each other. The other version of the turbine bucket involves a shaped piece which is set on the front surface of the flat element with its shape being complementary to the shape of the projection. Another invention of the group relates to a rotor comprising a rotor disk having axial grooves for slip joint, and the above turbine buckets.

EFFECT: group of inventions allows for the increased rigidity and damping abilities of turbine buckets.

20 cl, 6 dwg