US 11,739,729 B2
Safe state of an adaptable wind turbine blade
Per Egedal, Herning (DK); and Mikkel Aggersbjerg Kristensen, Herning (DK)
Assigned to SIEMENS GAMESA RENEWABLE ENERGY A/S
Appl. No. 17/312,028
Filed by Siemens Gamesa Renewable Energy A/S, Brande (DK)
PCT Filed Nov. 4, 2019, PCT No. PCT/EP2019/080092
§ 371(c)(1), (2) Date Jun. 9, 2021,
PCT Pub. No. WO2020/120033, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. 18212377 (EP), filed on Dec. 13, 2018.
Prior Publication US 2022/0025857 A1, Jan. 27, 2022
Int. Cl. F03D 7/02 (2006.01); F03D 1/06 (2006.01)
CPC F03D 7/0232 (2013.01) [F03D 1/0633 (2013.01); F05B 2240/3052 (2020.08)] 18 Claims
OG exemplary drawing
 
1. An arrangement for controlling inflow and outflow of a fluid into and out of an expandable container arranged to change a state of an adaptable flow regulating device installed at a wind turbine rotor blade, the arrangement comprising:
an inflow valve arranged to control fluid inflow into the container;
an outflow valve arranged to control fluid outflow out of the container;
wherein the inflow valve and the outflow valve are configured to prohibit fluid flow into and out of the container in case of a safety stop event such that the adaptable flow regulating device is maintained at a respective state.