Perforated drum of a compressor of an axial turbine engine

Patent metadata

Field	Value
Publication number	US-10273977-B2
Application number	US-201615198927-A
Country	US
Kind code	B2
Filing date	Jun 30, 2016
Priority date	Jul 1, 2015
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

A rotor, in particular a drum of a low-pressure compressor of a turbojet aero engine, is disclosed. The rotor includes an outer annular wall delimiting a primary annular flow of the turbine engine, sealing devices with two rubbing strips or annular ribs formed on the wall. The rubbing strips cooperate by abrasion with inner shrouds. In addition, the annular wall includes rows of intake orifices for leakages which are arranged between each pair of rubbing strips in order to aspirate the recirculation leakages there. A plenum for leakages is formed inside the rotor by means of a composite partitioning, then evacuates the parasitic flow downstream of the turbine engine via the central shaft.

First claim

I claim:

1. A rotor of an axial turbine engine, the rotor comprising:
a rotation axis;
an outer annular wall around the rotation axis; and
at least two sealing devices formed on the wall,
wherein the annular wall comprises:
at least two intake orifices for leakages that are axially separated, each intake orifice being disposed within a respective sealing device in order to divert the leakages therefrom and to evacuate the leakages axially beyond the rotor;

wherein the sealing devices each comprise:
at least one set of radial annular ribs configured to cooperate with an inner shroud, the respective orifice being arranged axially between the annular ribs,

wherein the rotor further comprises an intake plenum for leakages communicating with the at least two intake orifices, the intake plenum being at least partly delimited by a partition made of flexible material.

2. The rotor of claim 1 , wherein the wall surrounds an annular space which communicates with the at least two intake orifices.

3. The rotor of claim 1 , further comprising:
at least one annular row of rotor blades which is carried by the annular wall and arranged upstream of at least one of the at least two orifices and upstream of at least one of the at least two sealing devices.

4. The rotor of claim 1 , wherein the wall comprises:
several orifices forming at least one circular row of orifices arranged at a common axial position.

5. The rotor of claim 1 , wherein the annular wall comprises:
escape openings directed upstream, which communicate with escape piercings of a fan disc.

6. The rotor of claim 1 , wherein the wall comprises:
a revolution profile with a portion extending principally axially and a portion extending principally radially, the at least two orifices being arranged level the axial portion.

7. The rotor of claim 1 , wherein at least one or each intake orifice comprises:
a load loss element through the orifice.

8. A turbine engine, comprising:
a fan with a cone which has an internal cavity, the cone being provided with piercings;
a hollow shaft with a passage, wherein the passage communicates with the internal cavity of the cone and with the piercings; and
a rotor, the rotor comprising:
a rotation axis;
an outer annular wall around said rotation axis; and
a sealing device including a set of at least two radial annular ribs formed around the wall;
wherein the annular wall comprises:
at least one intake orifice through the outer annular wall and disposed axially between the at least two radial annular ribs of the set, the at least one intake orifice being in communication with the passage of the hollow shaft through the escape openings arranged in the wall and through the piercings arranged in the cone.

Assignees

• Techspace Aero Sa
• Safran Aero Boosters Sa

Inventors

• Hiernaux Stéphane

Classifications

• F04D29/542

  Bladed diffusers (fixing blades to stators F01D9/042) · CPC title

• F04D29/682 Primary

  by fluid extraction · CPC title

• F04D29/662

  Balancing of rotors (compensating imbalance G01M1/36) · CPC title

• F01D5/06 Primary

  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)} · CPC title

• F01D11/04

  using sealing fluid, e.g. steam · CPC title