US 11,852,000 B2
Multi-speed turbine reduction gearbox system and method
David Keith Crowe, Tucson, AZ (US); and Elden Crom, Tucson, AZ (US)
Assigned to Signal Power Group Operating LLC, Oro Valley, AZ (US)
Appl. No. 17/919,244
Filed by Signal Power Group Operating LLC, Oro Valley, AZ (US)
PCT Filed Feb. 9, 2022, PCT No. PCT/US2022/015857
§ 371(c)(1), (2) Date Oct. 14, 2022,
PCT Pub. No. WO2022/173858, PCT Pub. Date Aug. 18, 2022.
Claims priority of provisional application 63/147,578, filed on Feb. 9, 2021.
Prior Publication US 2023/0139271 A1, May 4, 2023
Int. Cl. F02C 7/36 (2006.01); E21B 43/26 (2006.01); F01D 15/08 (2006.01); F01D 15/10 (2006.01)
CPC E21B 43/2607 (2020.05) [F01D 15/08 (2013.01); F01D 15/10 (2013.01); F02C 7/36 (2013.01); F05D 2220/76 (2013.01); F05D 2260/4023 (2013.01); F05D 2260/40311 (2013.01); F05D 2260/902 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A turbine driven pump gearbox system comprising:
a turbine engine;
a planetary gearbox driven by the turbine engine;
a primary shaft driven directly by the planetary gearbox, the primary shaft having a first primary shaft gear and a second primary shaft gear;
a power takeoff device for generating power when driven by the primary shaft;
a secondary shaft having a first secondary shaft gear and a second secondary shaft gear;
a collar associated with the secondary shaft for selectively disengaging or engaging the primary shaft and the secondary shaft in at least one of three positions:
a first engaged position where the first primary shaft gear engages the first secondary shaft gear;
a second engaged position where the second primary shaft gear engages the second secondary shaft gear;
a disengaged position, being a neutral position, where the primary shaft is disengaged from the secondary shaft;
a primary shaft brake for braking a primary shaft rotation; and
a secondary shaft brake for braking a secondary shaft rotation,
wherein the power takeoff device, the primary shaft brake, and the secondary shaft brake are controlled as a clutch to shift engagement of the primary shaft and the secondary shaft among the first engaged position, second engaged position, and disengaged position.