# US 2018/0023394 A1 · Rotor with a locking plate for securing an antirotation lock against unscrewing

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- Number: US 2018/0023394 A1
- Document ID: US20180023394A1
- Status: Published application
- Kind: A1
- Application number: 15/550,198
- Filed: 2016-01-07
- Published: 2018-01-25
- Earliest claimed: 2015-03-04
- Assignees: Siemens Aktiengesellschaft
- Applicants: Siemens Aktiengesellschaft
- Inventors: Kevin Kampka; Karsten Kolk; Peter Schröder; Vyacheslav Veitsman
- Web page: https://patentgrep.com/patent/US20180023394A1

## CPC

- F01D 5/066: {Connecting means for joining rotor-discs or rotor-elements together, e.g. by a central bolt, by clamps}
- F01D 5/082: {on the side of the rotor disc}
- F01D 5/087: {in the radial passages of the rotor disc}
- F01D 5/3015: {with side plates}
- F01D 5/3069: {between two discs or rings}
- F04D 29/266: {mounting compressor rotors on shafts}
- F05D 2260/30: Retaining components in desired mutual position
- F05D 2260/33: with a bayonet coupling
- F05D 2260/96: Preventing, counteracting or reducing vibration or noise
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

A rotor, in particular a gas turbine rotor, having multiple rotor discs, each of which has an axial through-opening, and the rotor discs are axially clamped by at least one tie rod extending through the through-openings and are combined so as to form at least one rotor disc unit. At least one support ring which surrounds the tie rod and is in engagement with a paired rotor disc rests against the outer diameter of the tie rod, and the tie rod is supported against the rotor disc by the support ring. In order to axially secure the at least one support ring, at least one securing ring is provided which is secured to the paired rotor disc by a rotational lock and which holds the support ring against the rotor disc. The securing ring is prevented from unscrewing by a securing plate.

## Claims

### Claim 1

A rotor, comprising:
a plurality of rotor disks having in each case an axial through-hole, which rotor disks are axially clamped via at least one tie rod extending through the through-holes and are assembled to form at least one rotor disk unit,
at least one support ring, which encompasses the tie rod, that butts against the outside diameter of the tie rod, which support ring engages with an associated rotor disk and via which the tie rod is supported on the rotor disk,
at least one locking ring for axially securing the at least one support ring,
an antirotation lock, wherein the locking ring is fastened on the associated rotor disk by the antirotation lock and retains the support ring, and
a locking plate, wherein the locking ring is secured against unscrewing by the locking plate.

### Claim 2 (depends on 1)

The rotor as claimed in claim 1,
wherein the locking plate engages with the locking ring and with the associated rotor disk.

### Claim 3 (depends on 1)

The rotor as claimed in claim 1,
wherein the locking ring has a recess which accommodates the locking plate and extends in an L-shaped manner over an outer circumferential surface of the locking ring and over an end face of the locking ring which faces the associated rotor disk.

### Claim 4 (depends on 1)

The rotor as claimed in claim 1,
wherein the associated rotor disk has a radially extending cutout on an outer end face for receiving the locking plate and is positioned in such a way that it aligns with the recess of the locking ring when this is in a locking position.

### Claim 5 (depends on 3)

The rotor as claimed in claim 3,
wherein the locking plate has a Z-shaped design and is accommodated in the recess of the locking ring and in the cutout of the associated rotor disk.

### Claim 6 (depends on 1)

The rotor as claimed in claim 1,
wherein the antirotation lock is designed as a bayonet connection.

### Claim 7 (depends on 6)

The rotor as claimed in claim 6,
wherein the locking ring has radially projecting bayonet lugs distributed along its circumference which engage in an annular bayonet slot provided on the associated rotor disk, which bayonet slot has bayonet-lug receiving openings which are designed to correspond to the bayonet lugs and enable an axial insertion of the bayonet lugs into the bayonet slot.

### Claim 8 (depends on 6)

The rotor as claimed in claim 6,
wherein the recess of the locking ring splits one of the bayonet lugs.

### Claim 9 (depends on 1)

The rotor as claimed in claim 1,
wherein the support ring has a widening inside diameter, and
wherein the support ring engages by its free end of larger inside diameter in an annular slot which is provided on the associated rotor disk.

### Claim 10

A method for securing a locking ring for a rotor having a plurality of rotor disks having in each case an axial through-hole, which rotor disks are axially clamped via at least one tie rod extending through the through-holes and are assembled to form at least one rotor disk unit, at least one support ring, which encompasses the tie rod, butts against the outside diameter of the tie rod, which support ring engages with an associated rotor disk and via which the tie rod is supported on the rotor disk, the method comprising:
axially securing the at least one support ring with at least one locking ring, wherein the at least one locking ring is fastened on the associated rotor disk by an antirotation lock and retains the support ring; and
keeping the at least one support ring in engagement with an associated rotor disk, against unscrewing using a locking plate.

### Claim 11 (depends on 1)

The rotor as claimed in claim 1,
wherein the rotor comprises a gas turbine rotor.

### Claim 12 (depends on 8)

The rotor as claimed in claim 8,
wherein the recess of the locking ring splits one of the bayonet lugs in the middle.