TURBINE ROTOR FOR THERMAL POWER PLANT AND METHOD OF ITS ASSEMBLY Russian patent published in 2015 - IPC F01D5/30 

FIELD: electricity.

SUBSTANCE: turbine rotor of a thermal power plant contains a set of blades, a rotor disk and a fixing device. The rotor disk is attached to the shaft and has on the periphery the ledges to which the blades are attached. The rotor disk has a groove open towards the axial direction and having the bottom and top surfaces, and the bottom surface of the groove is located on the rotor disk periphery, and the top surface of the groove is located on ledges and faces towards the bottom surface. The groove of the rotor disk has in the area of its ledges an axial section with a deepening and an open section on which the groove is open towards the axial direction, and the radial width of the deepening is greater, than the radial width of the open section. Each blade has the shank lateral ledge having on the lower part a groove with the top surface located after the top surface of the rotor disk groove. The fixing device is installed in the rotor disk groove for fixing of blades. During assembly of the named turbine rotor the blades are installed between rotor disk ledges, and in the rotor disk groove and in the blade groove the bottom and top profiles are installed. Then the intermediate closing element is installed for strong pressing of bottom and top profiles respectively to the bottom surface of the rotor disk groove and to the top surfaces of the rotor disk groove and grooves of blades.

EFFECT: group of inventions allows to increase service life of the turbine rotor and to simplify a design of fixing devices.

7 cl, 12 dwg