# US 8,784,064 B2 · Multi-component bladed rotor for a turbomachine

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- Number: US 8,784,064 B2
- Document ID: US8784064B2
- Status: Granted
- Kind: B2
- Application number: 12/812,862
- Filed: 2008-12-11
- Published: 2011-03-03
- Granted: 2014-07-22
- Earliest claimed: 2008-02-13
- Assignees: MAN Diesel & Turbo SE
- Applicants: Emil Aschenbruck; Michael Blaswich; Andreas Kleinefeldt; William F. Cline
- Inventors: Emil Aschenbruck; Michael Blaswich; Andreas Kleinefeldt; William F. Cline
- Web page: https://patentgrep.com/patent/US8784064B2

## CPC

- F01D 5/3038: {the slot having inwardly directed abutment faces on both sides}
- F01D 5/06: Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections {(F01D5/022, F01D5/023 take precedence)}
- F01D 5/066: {Connecting means for joining rotor-discs or rotor-elements together, e.g. by a central bolt, by clamps}
- F01D 5/3069: {between two discs or rings}
- F05D 2240/20: Rotors
- F05D 2250/13: trapezoidal
- F05D 2250/182: crenellated, notched
- F05D 2250/183: zigzag
- F05D 2250/184: sinusoidal
- F05D 2260/30: Retaining components in desired mutual position
- F05D 2260/36: by a form fit connection, e.g. by interlocking
- F05D 2260/403: through the shape of the drive components
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

A multipart bladed rotor (1) for a flow machine, particularly a gas turbine or steam turbine or an axial compressor, has at least two disks (2) whose front sides, which face one another, are connected to one another, particularly by positive engagement, in a separating plane (7) so as to be fixed with respect to rotation relative to one another, wherein a groove (10) for receiving a blade root (14) of at least one rotor blade is formed in the separating plane.

## Claims

### Claim 1

A multipart bladed rotor (1) for a flow machine, comprising:
at least two individual disks (2) each carrying at least one rotor blade, each of the individual disks having front sides facing one another; and
a connector that connects said disks to one another, by clamping, in a separating plane (7) so as to be fixed with respect to rotation relative to one another, said disks defining a groove (10) formed in the separating plane for receiving a blade root (14) of at least one rotor blade.

### Claim 2 (depends on 1)

The rotor according to claim 1, wherein said disks are connected to a spur toothing formed in the separating plane.

### Claim 3 (depends on 2)

The rotor according to claim 2, wherein said groove comprises a groove base and wherein said spur soothing extends radially in said groove base below said blade root.

### Claim 4 (depends on 1)

The rotor according to claim 1, wherein said groove comprises a groove cross-section and a centroid said separating plane extending substantially through said centroid of said groove cross section.

### Claim 5 (depends on 4)

The rotor according to claim 4, wherein said groove is formed substantially symmetric to said separating plane.

### Claim 6 (depends on 1)

The rotor according to claim 1, wherein said groove has a fir-tree shaped cross section.

### Claim 7 (depends on 1)

The rotor according to claim 1, wherein said groove is extending in circumferential direction of the rotor for receiving a plurality of blade roots which are distributed along the circumference.

### Claim 8 (depends on 7)

The rotor according to claim 7, wherein said groove has a cross section which is substantially constant in circumferential direction of said rotor.

### Claim 9 (depends on 1)

The rotor according to claim 1, comprising at least one additional row of blades on at least one of said two disks parallel to said separating plane.

### Claim 10 (depends on 9)

The rotor according to claim 9, additionally comprising a second groove and wherein a second row of blades is fastened in a positive engagement by means of blade roots held in said second groove.

### Claim 11 (depends on 1)

The rotor according to claim 1, wherein said connector comprises a tie rod and wherein said at least two disks are connected to one another axially by means of said tie rod.

### Claim 12 (depends on 1)

A flow machine having a multipart bladed rotor according to claim 1.

### Claim 13 (depends on 2)

The rotor according to claim 2, wherein said spur toothing is one of a Hirth-type toothing and a Gleason-type toothing.

### Claim 14 (depends on 12)

The flow machine of claim 12, wherein the flow machine is selected from the group consisting of a gas turbine, a steam turbine and an axial compressor.