US 12,448,903 B1
Turbine engine having a lubrication system with a gearbox lubrication system parameter
Brandon W. Miller, Middletown, OH (US); Miriam Manzoni, Rivalta di Torino (IT); Rosa Addabbo, Castellaneta (IT); Alessandro Anderlini, Poggibonsi (IT); Marco Sandrucci, Certaldo (IT); Federico Leonardi, Vinovo (IT); and Andrew Hudecki, Milford, OH (US)
Assigned to GENERAL ELECTRIC COMPANY, Evendale, OH (US); and GE AVIO S.R.L., Rivalta di Torino (IT)
Filed by General Electric Company, Evendale, OH (US); and GE Avio S.r.l., Rivalta di Torino (IT)
Filed on Dec. 10, 2024, as Appl. No. 18/975,887.
Int. Cl. F01D 25/18 (2006.01); F01D 25/20 (2006.01); F02C 7/06 (2006.01); F02C 7/36 (2006.01); F02C 3/107 (2006.01)
CPC F01D 25/18 (2013.01) [F01D 25/20 (2013.01); F02C 7/06 (2013.01); F02C 7/36 (2013.01); F02C 3/107 (2013.01); F05D 2260/40311 (2013.01); F05D 2260/98 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A turbine engine comprising:
a turbo-engine including a compressor section, a combustor, and a turbine section, the turbo-engine having an input shaft that couples the compressor section to the turbine section;
a gearbox assembly including a gear assembly having a plurality of gears including a first gear, a plurality of second gears meshing with the first gear, and a third gear meshing with the plurality of second gears;
a propulsor having an output shaft drivingly coupled to the input shaft through the gear assembly; and
a lubrication system including a lubricant supply that stores lubricant therein, one or more lubricant supply lines, and a lubricant pump for supplying the lubricant to the gearbox assembly from the lubricant supply through the one or more lubricant supply lines at a mass flow rate that is linear with a lubricant pump speed of the lubricant pump, the lubrication system being characterized by a Gearbox Lubrication System Parameter (GLSP) between 0.2 and 140, the GLSP being given by:

OG Complex Work Unit Math
wherein ηDP is a gearbox efficiency of the gearbox assembly at a design point operating condition, NDP is an input shaft speed of the input shaft at the design point operating condition, VGBX is a gearbox volume of the gearbox assembly, NS is a number of the plurality of second gears, dTOC/dTDP is a gearbox temperature ratio of a change in a temperature of the lubricant at a particular operating condition to the change in the temperature of the lubricant at the design point operating condition, PDP/POC is a gearbox power ratio of a power of the output shaft at the design point operating condition to the power of the output shaft at the particular operating condition, and NDP/NOC is a gearbox speed ratio of the input shaft speed at the design point operating condition to the input shaft speed at the particular operating condition.