One-block bladed disk provided with blades with adapted foot profile

Patent metadata

Field	Value
Publication number	US-9677404-B2
Application number	US-201214348770-A
Country	US
Kind code	B2
Filing date	Oct 8, 2012
Priority date	Oct 7, 2011
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

A one-block bladed disk includes blades, a leading edges of which has sweep and dihedral angles, both strongly variable and increasingly large upon approaching a connection to a hub to improve mechanical strength of the whole and obtain good distribution of gas flow over the height of the blade.

First claim

The invention claimed is:

1. A one-block bladed disk comprising:
a hub; and
blades connected in one-piece to the hub;
wherein the blades, in a foot area adjacent to the hub and extending over about 20% to 30% of a height of the blade, have a dihedral angle and a sweep angle having values increasing continuously both by at least 10° upon approaching the hub.

2. The one-block bladed disk according to claim 1 , wherein the sweep angle and the dihedral angle have values decreasing continuously in a median area of the blade, adjacent to the foot area, upon approaching the hub.

3. The one-block bladed disk according to claim 1 , wherein the dihedral angle is always negative, except at a portion of the foot area which is closest to the hub.

4. The one-block bladed disk according to claim 1 , wherein the sweep angle has positive values in a median area of the blade, and has greater values than all those of the median area in a portion of the foot area which is closest to the hub.

5. The one-block bladed disk according to claim 4 , wherein the sweep angle has a maximum value of at least twice a value the sweep angle has outside the foot area.

6. The one-block bladed disk according to claim 5 , wherein the maximum value is at least 20° .

7. The one-block bladed disk according to claim 3 , wherein the portion of the foot area extends over 5% to 10% of the height of the blade.

8. The one-block bladed disk according to claim 4 , wherein the portion of the foot area extends over 10% to 20% of the height of the blade.

9. A turbine engine, comprising a one-block bladed disk according to claim 1 .

10. The turbine engine according to claim 9 , wherein the one-block bladed disk forms a compressor fan fnlly upstream from a gas flow through the turbine engine.

Assignees

• Snecma

Inventors

• Merville Didier
• Galons Lucie
• Perrot Vincent
• Reiss Hanna

Classifications

• F05D2250/71

  curved · CPC title

• F01D5/14 Primary

  Form or construction (selecting particular materials, measures against erosion or corrosion F01D5/28) · CPC title

• F04D29/324

  Blades · CPC title

• F01D5/141

  Shape, i.e. outer, aerodynamic form (F01D5/148 - F01D5/20 take precedence; blade construction F01D5/147) · CPC title

• F05D2250/70

  Shape · CPC title