초록 ▼

A rotor of a steam or gas turbine is equipped with rotor blades, which are held in the rotor (6) in a plurality of radial rows and comprise a blade foot 1 installed in the rotor (6), a blade leaf (2) and a cover plate (3). An open pocket ( 5) is prepared in the sloping surfaces of the cover plates (

A rotor of a steam or gas turbine is equipped with rotor blades, which are held in the rotor (6) in a plurality of radial rows and comprise a blade foot 1 installed in the rotor (6), a blade leaf (2) and a cover plate (3). An open pocket ( 5) is prepared in the sloping surfaces of the cover plates (3) of a row of rotor blades, which the sloping surfaces are located opposite each other. The pockets (5) of two adjacent cover plates (3) form together an essentially closed cavity, which expands in the radial direction of the rotor (6). A pin, whose largest cross section is smaller than the largest cross section of the cavity but larger than the smallest cross section of the cavity, is placed freely movably into each cavity.

대표청구항 ▼

What is claimed is: 1. A rotor of a steam or gas turbine, the rotor comprising: rotor blades held in a rotor base in a plurality of radial rows, each rotor blade comprising a blade foot installed in the rotor base, a blade leaf and a cover plate, an open pocket being milled in the sloping surfaces

What is claimed is: 1. A rotor of a steam or gas turbine, the rotor comprising: rotor blades held in a rotor base in a plurality of radial rows, each rotor blade comprising a blade foot installed in the rotor base, a blade leaf and a cover plate, an open pocket being milled in the sloping surfaces of each of the cover plates of one row of said rotor blades, said sloping surfaces being located opposite each other with the pockets of two adjacent cover plates together forming an essentially closed cavity, which cavity expands in the radial direction of the rotor in a drop-like manner to a largest cross section and narrows from said largest cross section and which cavity ends in two planar wedge surfaces; a plurality of pins, each of said pins having a largest cross section that is smaller than a largest cross section of the cavity and larger than the smallest cross section of the cavity, each of said pins being placed freely movably in a corresponding said cavity. 2. A rotor in accordance with claim 1, wherein the pockets of two adjacent cover plates are mirror-symmetrical in relation to one another. 3. A rotor in accordance with claim 1, wherein the pockets of two adjacent cover plates are asymmetrical in relation to one another. 4. A rotor in accordance with claim 1, wherein the shape of each pin is adapted to the shape of the cavity. 5. A rotor in accordance with claim 1, wherein each pin is cylindrical. 6. A rotor in accordance with claim 1, wherein a wedge angle formed by the inner surfaces of the pockets of the cavity with respect to one another is greater than the angle at which self-locking of each pin in the cavity takes place. 7. A rotor of a steam or gas turbine, the rotor comprising: a rotor base; a plurality of rotor blades held in said rotor base in a plurality of radial rows, each rotor blade comprising a blade foot installed in the rotor base, a blade leaf and a solid metal cover plate with side sloping surfaces, an open pocket being milled into the solid metal side sloping surfaces of each of said cover plates of one row of said rotor blades, said sloping surfaces being located opposite each other with the pockets each having a planar wedge surface followed by a curved surface and pockets of two adjacent cover plates together forming an essentially closed cavity to provide a plurality of cavities, each of said planar wedge surfaces being angled away from each other and being followed by said curved surface with said wedge surfaces and curved surfaces providing an expansion of said cavities in a radial direction of the rotor; a plurality of pins, each of said pins being disposed freely movably in a corresponding one of said cavities, each of said pins having a largest cross section that is smaller than a largest cross section of said cavities and larger than a smallest cross section of said cavities. 8. A rotor in accordance with claim 7, wherein each of said cavities expands in a rotor radial direction to a largest cross section and narrows. 9. A rotor in accordance with claim 7, wherein each of said cavities is formed from two said pockets to have a drop-shaped design. 10. A rotor in accordance with claim 7, wherein the pockets of two adjacent cover plates are mirror-symmetrical in relation to one another. 11. A rotor in accordance with claim 7, wherein the pockets of two adjacent cover plates are asymmetrical in relation to one another. 12. A rotor in accordance with claim 7, wherein each of said pins has a shape adapted to the corresponding cavity. 13. A rotor in accordance with claim 7, wherein each pin is cylindrical. 14. A rotor in accordance with claim 7, wherein a wedge angle formed by the inner surfaces of the pockets of each of the cavities with respect to one another is greater than the angle at which self-locking of each pin in the cavity takes place. 15. A rotor of a steam or gas turbine, the rotor comprising: a rotor base; a plurality of rotor blades held in said rotor base in a plurality of radial rows, each rotor blade comprising a blade foot installed in the rotor base, a blade leaf and a cover plate, an open pocket being milled in the sloping surfaces of each of said cover plates of one row of said rotor blades, said sloping surfaces being located opposite each other with the pockets of two adjacent cover plates together forming an essentially closed cavity to provide a plurality of cavities, with respect to a direction of the rotor, each pocket having an arcuate wall extending from an axially inward portion of the respective sloping surface to expand the pocket radially and followed by a planar wedge surface extending axially from the arcuate surface to the respective axially outer portion of the respective sloping surface and toward the adjacent pocket; a plurality of pins, each of said pins being disposed freely movably in a corresponding one of said cavities, each of said pins having a largest cross section that is smaller than a largest cross section of said cavities and larger than a smallest cross section of said cavities. 16. A rotor in accordance with claim 15, wherein an angle of at least one wedge surface of one of said plurality of rotor blades is different from an angle of at least one other wedge surface of an adjacent one of said plurality of rotor blades with said at least one wedge surface and said at least one other wedge surface form a single cavity.