INSERT FOR ADJUSTMENT OF THROUGH-HOLE IN STEAM TURBINE ROTOR WHEEL AND METHOD OF ITS MOUNTING Russian patent published in 2014 - IPC F01D5/06 F01D3/04 F16B19/10 

FIELD: machine building.

SUBSTANCE: insert (10) and the method of adjustment of steam balance through-hole (54) in a wheel (52) of steam turbine rotor are proposed. The insert (10) includes a housing (12) with have longitudinal axle (14) and oppositely located first and second ends (16, 18). Insert flange (20) is oriented in radial direction from the second end (18) of the housing (12). The exterior surface (22) is located along the housing (12) periphery between the named first end (16) and the flange (20). The first bore (24), made in the body (12), forms the first opening (28) in the first end (16), while the named first channel (24) and exterior surface (22) of the housing (12) together confine among themselves the wall (32), capable of being plastically deformed in a radially outward direction. The second bore (26), made in the housing (12), communicates with the named first bore (24) and has a smaller cross-section, than the first bore (24). The installation method entails the installation of the insert (10) in the through-hole (54) and expansion of the wall (32) to clamp the axial thickness of the wheel (52) between the flange (20) and expanded wall (32) of the insert (10).

EFFECT: simple installation of the insert is achieved, which can be executed by one employee without modifying of the wheel, the risk of strain of adjoining wheels is eliminated during the installation.

7 cl, 5 dwg