Support providing a complete connection between a turbine shaft and a degassing pipe of a turbojet

Patent metadata

Field	Value
Publication number	US-10302016-B2
Application number	US-201715803271-A
Country	US
Kind code	B2
Filing date	Nov 3, 2017
Priority date	Nov 7, 2016
Publication date	May 28, 2019
Grant date	May 28, 2019

Abstract

The invention relates to a support providing a complete connection between a degassing pipe ( 3 ) and a turbine shaft ( 2 ), said support including a plurality of outer contact spans ( 41 a ) intended to bear on the inner walls of the turbine shaft to secure the degassing pipe with respect thereto, characterized in that the different spans are each bordered by at least one elastomer insert ( 41 g ) which contributes to the protection of the turbine shaft during insertion of the support therein.

First claim

The invention claimed is:

1. A support providing a complete connection between a degassing pipe and a turbine shaft, said support including a plurality of outer contact spans intended to bear on an inner wall of the turbine shaft to secure the degassing pipe with respect thereto, characterized in that the different spans are each bordered by at least one elastomer insert which contributes to the protection of the turbine shaft during insertion of the support therein, and in that the elastomer inserts protrude with respect to the contact spans along which they are positioned so as to prevent metal/metal contact between the turbine shaft and the contact spans during insertion of said support.

2. The support according to claim 1 , characterized in that it includes a plurality of lateral extra thicknesses which extend on either side of the outer contact spans and at which are disposed the elastomer inserts.

3. The support according to claim 2 , characterized in that it includes a plurality of dimples formed in the lateral extra thicknesses, said dimples receiving the elastomer inserts.

4. The support according to claim 3 , characterized in that, the contact spans extending tangentially to a first virtual cylinder, the outer edges of the dimples extend along a second virtual cylinder concentric with the first and with a smaller radius.

5. The support according to claim 3 , characterized in that the elastomer inserts are assembled glued into the dimples.

6. The support according to claim 3 , characterized in that the elastomer inserts are assembled tightly into the dimples.

7. The support according to claim 1 , wherein the elastomer inserts protrude radially and tangentially with respect to the contact spans along which they are positioned.

8. A support system providing a complete connection between a degassing pipe and a turbine shaft, said support system comprising a support as defined in claim 1 , a nut intended to exert an axial thrust force on said support by screwing onto a threaded portion of a conical socket, said conical socket having a conical portion intended to transform the axial thrust into radial expansion of said support.

9. A degassing pipe and turbine shaft assembly secured thanks to a support system including a support as defined in claim 1 .

10. A turbine engine including a degassing pipe and turbine shaft assembly secured by a support system including a support as defined in claim 1 .

11. A turbine engine including a shaft with a changing inner diameter secured to a concentric inner part that is cylindrical overall thanks to a support system including a support as defined in claim 1 .

Assignees

• Safran Aircraft Engines

Inventors

• Durand Noel Didier
• Delaporte Daniel Nicolas
• Linquette Emmanuel

Classifications

• F02C7/20 Primary

  Mounting or supporting of plant; Accommodating heat expansion or creep · CPC title

• F01D25/22

  using working-fluid or other gaseous fluid as lubricant · CPC title

• F01D25/18

  Lubricating arrangements (of machines or engines in general F01M) · CPC title

• F16J15/3272

  the rings having a break or opening, e.g. to enable mounting on a shaft otherwise than from a shaft end · CPC title

• F05D2240/61

  Hollow · CPC title