Blade mounting

Claim 2

A blade fastening arrangement for blade means of compressors or turbines of the type having circumferentially extending blade holding groove means provided at the outer circumference of rotor disk means; said arrangement comprising hammer-head-like base portions on each of said blade means, web portions formed in said groove means and extending substantially over the entire circumference of the rotor disk for covering said base portions, said blade means being radially insertable into relatively small aperture means of the groove means by rotation of the blade means about their longitudinal axis and fixing means including base plate means, transmitting means, and locking means for fixing the blade means in a predetermined position in said groove means, said base plate means being formed radially outwardly of said base portions on each of said blade means, said base plate means having a greater width in the circumferential direction than the base portions, at least some of said base plate means being in abutting contact with the base plate means of the next adjacent blade means, said transmitting means including at least one transmitting element separate from said blade means and said locking means, said at least one transmitting element being clampingly engageable with portions of said groove means to circumferentially fix said transmitting element in said groove means between adjacent blade means such that said transmitting element transfers circumferentially directed forces between said blade means and said rotor disk means, said locking means including at least one locking element which fills a residual gap remaining between base plate means of adjacent blade means in the assembled condition of the blade means.

Claim 3

A blade fastening arrangement according to claim 1, characterized in that said at least one locking element for the residual gap remaining in the assembled condition of the blade means is arranged in the assembled condition transversely to the edges of the base plate means with portions engaging underneath the adjacent base plate means to prevent withdrawal thereof in a radial direction.

Claim 4

A blade fastening arrangement according to claim 1, characterized in that said groove means is of dove-tail cross-sectional shape.

Claim 5

A blade fastening arrangement according to claim 1, characterized in that the hammer-head-like base portions are arranged obliquely to the rotor disk axis and are adapted to be inserted by rotation into the groove means in such a manner that they fill nearly completely the groove cross-section.

Claim 6

A blade fastening for blade means of compressor or turbines retained in tangential groove means provided at the outer circumference of rotor disk means, characterized in that the tangential groove means form web portions covering hammer-head-like base portions of the blade means substantially over the entire circumference of the rotor disk means, in that the blade means provided with the hammer-head-like base portions are adapted to be inserted radially into the tangential groove means provided with relatively small aperture means by rotation of the blade means about their longitudinal axis, in that means are provided for fixing the blade means in a predetermined position relative to the outer diameter of the disk means, in that transmitting means with rounded-off outer corners are provided as clamping means which are matched essentially to the base shape of the blade means and are retained in the aperture means by a wedging action, and in that the transmitting means terminate in the radial height thereof below base plate means provided on said blade means radially outwardly of said base portions and in the assembled condition are covered by the base plate means pushed against one another.

Claim 7

A blade fastening for blade means of compressor or turbines retained in tangential groove means provided at the outer circumference of rotor disk means, characterized in that the tangential groove means form web portions covering hammer-head-like base portions of the blade means substantially over the entire circumference of the rotor disk means, in that the blade means provided with the hammer-head-like base portions are adapted to be inserted radially into the tangential groove means provided with relatively small aperture means by rotation of the blade means about their longitudinal axis, in that means are provided for fixing the blade means in a predetermined position relative to the outer diameter of the disk means, in that transmitting means with rounded-off outer corners are provided as clamping means which are matched essentially to the base shape of the blade means and are retained in the aperture means by a wedging action, and in that the transmitting means terminate in the radial height thereof below base plate means provided on said blade means radially outwardly of said base portions and in the assembled condition are covered by the base plate means pushed against one another.

Claim 8

A blade fastening arrangement according to claim 1, characterized in that some base plate means are shortened in the circumferential direction on at least one side in relation to the other blade means.

Claim 9

A blade fastening arrangement according to claim 1, characterized in that the base plate means of the blade means inserted last are shortened in the circumferential direction at least on one side in relation to the other blade means.

Claim 10

A blade fastening arrangement according to claim 1, characterized in that the base plate means of at least one blade means is shortened in the circumferential direction on one side in relation to other blade means and at least one other base plate means is shortened on both sides in relation to other blade means.

Claim 11

A blade fastening arrangement according to claim 6, characterized in that an arcuately shaped aperture means is provided in mutually opposite web portions of the groove means for accommodating insertion of said at least one transmitting element.

Claim 12

A blade fastening arrangement according to claim 9, characterized in that the blade means have a constant spacing from one another in the assembled condition and in that the gaps formed by the shortened base plate means are filled by filler means.

Claim 13

A blade fastening arrangement according to claim 10, characterized in that the filler means are divided centrally in the radial direction and in the assembled condition possess substantially the outer contour of the bladE base portion with base plate means and are retained underneath the web portions of the groove means.

Claim 14

A blade fastening arrangement according to claim 11, characterized in that the cross-sectional shape of said at least one transmitting element is matched essentially to the shape of the base portions of the blade means.

Claim 15

A blade fastening arrangement according to claim 12, characterized in that the at least one transmitting element terminates in the radial height thereof below the base plate means and in the assembled condition are covered by the base plate means pushed against one another.

Claim 16

A blade fastening arrangement according to claim 13, characterized in that said at least one locking element for the residual gap remaining in the assembled condition of the blade means is arranged in the assembled condition transversely to the edges of the base plate means with portions engaging underneath the adjacent base plate means to prevent withdrawal thereof in a radial direction.

Claim 17

A blade fastening arrangement according to claim 14, characterized in that each of the at least one locking elements is formed of a bent, double sheet metal element and is provided at its upper edge with two tab-shaped tongue portions which are bent in the assembled condition of the locking element between the adjacent base plate means and fill the residual gap in its width.

Claim 18

A blade fastening arrangement according to claim 15, characterized in that transmitting, filler and locking means are provided several times symmetrically along the circumference of the rotor disk means.

Claim 19

A blade fastening arrangement according to claim 16, characterized in that said groove means is of dove-tail cross-sectional shape.

Claim 20

A blade fastening arrangement according to claim 1, characterized in that the cross-sectional shape of said at least one transmitting element is matched essentially to the shape of the base portions of the blade means.

Claim 21

A blade fastening arrangement for blade means of compressors or turbines of the type having tangential blade holding groove means provided at the outer circumference of rotor disk means; said arrangement comprising hammer-head-like base portions on each of said blade means, web portions formed in said groove means and extending substantially over the entire circumference of the rotor disk for covering said base portions, said blade means being radially insertable into relatively small aperture means of the tangential groove means by rotation of the blade means about their longitudinal axis, and fixing means for fixing the blade means in a predetermined position in said groove means, said fixing means including base plate means formed radially outwardly of said base portions on each of said blade means, said base plate means having a greater width in the circumferential direction than the base portions, and wherein at least some of said base plate means are in abutting contact with the base plate means of the next adjacent blade means so as to maintain said blade means in a predetermined circumferential position with respect to one another, characterized in that a locking means is provided as locking element for the residual gap remaining in the assembled condition of the blade means, said locking means being arranged in the assembled condition transversely to the edges of the base plate means by rotation and engaging underneath the adjacent base plate means, and characterized in that the locking means is formed of a bent, double sheet metal element and is provided at its upper edge with two tab-shaped tongue portions which are bent in the assembled condition of the locking means between the adjacent base plate means and fill the residual gap in its width.

Claim 22

A blade fastening arrangement for blade means of compressors or turbines of the type having tangential blade holding groove means provided at the outer circumference of rotor disk means; said arrangement comprising hammer-head-like base portions on each of said blade means, web portions formed in said groove means and extending substantially over the entire circumference of the rotor disk for covering said base portions, said blade means being radially insertable into relatively small aperture means of the tangential groove means by rotation of the blade means about their longitudinal axis, and fixing means for fixing the blade means in a predetermined position in said groove means, said fixing means including base plate means formed radially outwardly of said base portions on each of said blade means, said base plate means having a greater width in the circumferential direction than the base portions, and wherein at least some of said base plate means are in abutting contact with the base plate means of the next adjacent blade means so as to maintain said blade means in a predetermined circumferential position with respect to one another, characterized in that a locking means is provided as locking element for the residual gap remaining in the assembled condition of the blade means, said locking means being arranged in the assembled condition transversely to the edges of the base plate means by rotation and engaging underneath the adjacent base plate means, and characterized in that the locking means is formed of a bent, double sheet metal element and is provided at its upper edge with two tab-shaped tongue portions which are bent in the assembled condition of the locking means between the adjacent base plate means and fill the residual gap in its width.

Claim 23

A blade fastening arrangement according to claim 1, wherein the base plate means of some blade means have a different circumferential width than the base plate means of other blade means.

Claim 24

A blade fastening arrangement according to claim 20, characterized in that The blade means have a constant spacing from one another in the assembled condition and in that the gaps formed by the shortened base plate means are filled by filler means which are separate from the transmitting and locking means.

Claim 25

A blade fastening arrangement according to claim 21, characterized in that the filler means are divided centrally in the radial direction and in the assembled condition possess substantially the outer contour of the blade base portion with base plate means and are retained underneath the web portions of the groove means.

Claim 26

A blade fastening arrangement according to claim 19, characterized in that said transmitting, filler and locking means are provided several times symmetrically along the circumference of the rotor disk means.

Claim 27

A blade fastening arrangement according to claim 1, wherein said aperture means includes an opening having oppositely facing arcuately shaped edges formed in said web portions.

Claim 28

A blade fastening arrangement according to claim 24, wherein said transmitting element is inserted into said opening.

Claim 29

A blade fastening arrangement according to claim 1, wherein said at least one locking element is formed of a single piece of sheet metal bent into a configuration which simultaneously prevents radial withdrawal thereof and circumferentially spaces base plate means of adjacent blade means.

Claim 30

A blade fastening arrangement according to claim 26, wherein said at least one locking element is positioned and configured so as to substantially preclude transfer of circumferentially directed forces between said rotor disk means and said blade means by way of said locking element.

Claim 31

A blade fastening arrangement according to claim 1, wherein said at least one locking element is positioned and configured so as to substantially preclude transfer of circumferentially directed forces between said rotor disk means and said blade means by way of said locking element.

Claim 32

A blade fastening arrangement according to claim 1, wherein said at least one transmitting element exhibits rounded-off outer corners which clampingly engage circumferentially extending side walls of said groove means.

Claim 33

A blade fastening arrangement according to claim 1, wherein said at least one transmitting element clampingly engages circumferentially extending side walls of said groove means at positions radially inwardly of said base plate means and wherein the radial outermost portions of said at least one transmitting element in the assembled condition of the blade means are radially inward of the base plate means.

Claim 34

A blade fastening arrangement according to claim 30, wherein said radial outermost portions of said at least one transmitting element are completely covered in a radially outward direction by the base plate means.

Claim 35

A blade fastening arrangement according to claim 31, wherein said at least one locking element is positioned and configured so as to substantially preclude transfer of circumferentially directed forces between said rotor disk means and said blade means by way of said locking element.

Claim 36

A blade fastening arrangement according to claim 32, wherein said at least one locking element is formed of a single piece of sheet metal bent into a configuration which simultaneously prevents radial withdrawal thereof and circumferentially spaces base plate means of adjacent blade means.