US 11,703,181 B2
Control system for adjusting the temperature of bearing oil for the purpose of minimizing rotor vibrations
Andrey Mashkin, Cologne (DE); Robin Burzan, Mülheim an der Ruhr (DE); Sebastian Zahn, Karlsruhe (DE); Gerta Zimmer, Mülheim an der Ruhr (DE); Esteban Grau Sorarrain, Düsseldorf (DE); Alexander Münnekhoff, Essen (DE); Florian Röhr, Mülheim an der Ruhr (DE); Christian Jäkel, Duisburg (DE); and Matthias Kowalski, Mülheim an der Ruhr (DE)
Assigned to SIEMENS AKTIENGESELLSCHAFT, Munich (DE)
Appl. No. 16/644,427
Filed by Siemens Aktiengesellschaft, Munich (DE)
PCT Filed Aug. 9, 2018, PCT No. PCT/EP2018/071655
§ 371(c)(1), (2) Date Mar. 4, 2020,
PCT Pub. No. WO2019/048177, PCT Pub. Date Mar. 14, 2019.
Claims priority of application No. 10 2017 215 767.4 (DE), filed on Sep. 7, 2017.
Prior Publication US 2020/0256393 A1, Aug. 13, 2020
Int. Cl. F16N 7/38 (2006.01); F01M 5/00 (2006.01)
CPC F16N 7/38 (2013.01) [F01M 5/005 (2013.01); F16N 2210/02 (2013.01); F16N 2270/56 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A control system for reducing rotor vibrations in a system, in particular a variability thereof, in a shafting, in particular a turbine shafting, said control system configured to:
measure a temperature of a bearing of a shaft;
adjust a temperature of oil supplied to the bearing to a temperature as assigned as an output variable in an allocation for minimized rotor vibrations with the measured temperature of the bearing as the input variable;
a valve configured to adjust the temperature of the oil supped to the bearing, with the valve and the bearing being part of an oil circuit;
a mixing valve configured to combine an output of an oil cooler and a bypass of the oil circuit, with the bypass bypassing the oil cooler and connected to the mixing valve, said valve being disposed in the bypass;
for initial assignment with different temperatures of the bearing,
measuring the rotor vibrations,
calculating the respective oil temperatures of the bearing for minimizing the rotor vibrations,
storing the respective oil temperatures of the bearing as input variables, and
storing the associated calculated bearing oil temperatures as output variables in the assignment; and
obtaining empirical values from an operating history of the shafting, and storing the empirical values in the assignment as output variables, so that damping at an early stage is enabled and inertia of the system is compensated.