US 12,078,067 B2
Turbine and blade for the protection of the root from flow path hot gases
Paolo Di Sisto, Florence (IT); Leonardo Tognarelli, Florence (IT); and Simone Cubeda, Florence (IT)
Assigned to Nuovo Pignone Tecnologie—SRL, Florence (IT)
Appl. No. 17/905,297
Filed by NUOVO PIGNONE TECNOLOGIE—SRL, Florence (IT)
PCT Filed Feb. 22, 2021, PCT No. PCT/EP2021/025073
§ 371(c)(1), (2) Date Aug. 30, 2022,
PCT Pub. No. WO2021/175488, PCT Pub. Date Sep. 10, 2021.
Claims priority of application No. 102020000004585 (IT), filed on Mar. 4, 2020.
Prior Publication US 2023/0082038 A1, Mar. 16, 2023
Int. Cl. F01D 11/00 (2006.01); F01D 5/08 (2006.01); F01D 11/04 (2006.01)
CPC F01D 11/001 (2013.01) [F01D 5/081 (2013.01); F01D 11/00 (2013.01); F01D 11/04 (2013.01); F05D 2220/32 (2013.01); F05D 2240/24 (2013.01); F05D 2240/55 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A turbine, comprising:
a downstream rotor member and an upstream rotor member, both configured to rotate due to expansion of hot burned gas flowing into a hot gas flow path channel,
a spacer arranged between the downstream rotor member and the upstream rotor member, the spacer configured to avoid an ingested gas flow from the hot gas flow path channel to reach a wheel space found between the downstream rotor member and the upstream rotor member, wherein the spacer is arranged at a downward angle towards a rotation axis from the upstream rotor member to the downstream rotor member;
a deflector disposed on the upstream rotor member, the deflector having a lower surface spaced apart from the spacer and an upper surface configured to deflect the ingested gas flow over the upper surface of the spacer; and
a purging system fluidly coupled to the wheel space, the purging system configured to provide purging air into the wheel space,
wherein space between the lower surface of the deflector and the spacer is configured to allow purging air to flow out of the wheel space.