US 11,971,171 B2
Pilot cone cooling
Christian Beck, Essen (DE); Jürgen Meisl, Mülheim an der Ruhr (DE); Stefan Reich, Düsseldorf (DE); Sabrina Isolde Siebelist, Ratingen (DE); Christopher Grandt, Heiligenhaus (DE); and Benjamin Witzel, Duisburg (DE)
Assigned to Siemens Energy Global GmbH & Co. KG, Munich (DE)
Appl. No. 17/923,588
Filed by Siemens Energy Global GmbH & Co. KG, Bayern (DE)
PCT Filed Feb. 24, 2021, PCT No. PCT/EP2021/054508
§ 371(c)(1), (2) Date Nov. 6, 2022,
PCT Pub. No. WO2021/228447, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 20174892 (EP), filed on May 15, 2020.
Prior Publication US 2023/0184437 A1, Jun. 15, 2023
Int. Cl. F23R 3/28 (2006.01); F23R 3/34 (2006.01)
CPC F23R 3/283 (2013.01) [F23R 3/343 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A pilot cone for use in a burner arrangement, comprising:
a covering which widens downstream along a burner axis and which is passed through by cooling air passages, and having an internal wall which extends upstream from an upstream end of the covering,
an annular gap which extends at the radially external side along the internal wall and comprising cooling air openings which produce a connection from the annular gap to the cooling air passages, and
an external wall which extends upstream with spacing from the internal wall from the covering and which delimits the annular gap at the radially external side,
wherein the internal wall comprises apertures, and
wherein the internal wall and the annular gap widen upstream.