METHOD OF PROFILING A REPLACEMENT SHOOT AS A REPLACEMENT PARTS FOR OLD PULLEY FOR A TURBOMACHINE WITH A TWO-DIRECTION OF THE FLOW Russian patent published in 2017 - IPC F01D5/14 F01D9/02 

FIELD: machine engineering.

SUBSTANCE: according to the specified method, the geometric characteristics of the hub contour and the body of the flow channel provided with an old blade are determined, as well as the axial position of the center of gravity of the old blade of the blade, which is clamped in one hub in the hub or in the body. The geometric characteristics of the pen of the replacement blade are calculated such that the blade of the replacement blade at its leading edge is tilted in the upstream direction and has a straight sweep. Specifying the area of the pen of the replacement blade close to the clamping, which is 5% to 15% of the height of the replacement blade. The displacing blade portion of the replacement blade is disposed beyond this region, upstream, until the axial position of the center of gravity of the replacement blade is aligned with the axial position of the center of gravity of the old blade feather. In the region from the side of the clamping line of the contour of the pen of the replacement blade to the displaced portion of the feather of the replacement blade, the leading edge is inclined in the downstream direction to form a transitional sweep in this region. The profiling of the replacement blade is then carried out. Other inventions of the group refer to the rotor blade and the stator blade for the gas turbine manufactured in the above manner, as well as to the corresponding compressor blade.

EFFECT: group of inventions makes it possible to increase the aerodynamic efficiency of the turbomachine blades without increasing the load on the fastening elements of the mentioned blades.

7 cl, 2 dwg