# US 5,700,133 A · Damper disposition mounted between rotor vanes

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- Number: US 5,700,133 A
- Document ID: US5700133A
- Status: Granted
- Kind: A
- Application number: 08/714,978
- Filed: 1996-09-17
- Granted: 1997-12-23
- Earliest claimed: 1995-09-21
- Assignees: Societe Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."
- Inventors: Jean Marc Surdi
- Web page: https://patentgrep.com/patent/US5700133A

## CPC

- F01D 5/22: Blade-to-blade connections, {e.g. for damping vibrations}
- Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft
- Y10S 416/50: Vibration damping features
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

Damper disposition (8) mounted between two neighboring vanes (5) and which ncludes free inners (22) in housings (21) delimited by a radially external wall (16) slanted outwardly in the direction of the respective vane (5). The centrifugal forces produced by rotation of the disk of the rotor (4) move the inners (22) outside the housings (21) and forcibly apply them to the vanes (5) so as to dampen the vibrations, especially when considerable friction is produced against the outer wall (16). Application for turbo-engines and especially for the large vanes of input blowers.

## Claims

### Claim 1

Damper disposition mounted between two neighbouring vanes attached to a rotor disk and including a receptacle integral with the disk and fitted with housings opening towards the lateral faces of the vanes, and inners disposed in the housings, wherein the housings are delimited radially outwardly by portions of the receptacle on which the inners slide under the effect of centrifugal forces and which are slanted radially outwardly in the direction of the vanes where the housings open.

### Claim 2 (depends on 1)

Damper disposition according to claim 1, wherein the receptacle is bolted to at least one flange of the disk, a crown delimiting a gas flow vein being also bolted to said flange.

### Claim 3 (depends on 1, 2)

Damper disposition according to claim 1 or 2, wherein the housings are distributed by pairs in the receptacle, the housings of the pairs respectively opening towards the two vanes and communicating together.