US 12,442,356 B2
Vertical axis multi-stage wind turbine generator
Kyung Hee Han, Yonginsi (KR)
Filed by Kyung Hee Han, Yonginsi (KR)
Filed on Nov. 22, 2023, as Appl. No. 18/517,346.
Claims priority of application No. 10-2022-0158093 (KR), filed on Nov. 23, 2022.
Prior Publication US 2024/0167452 A1, May 23, 2024
Int. Cl. F03D 3/00 (2006.01); F03D 3/06 (2006.01); F03D 9/25 (2016.01); F03D 13/20 (2016.01); F03D 13/25 (2016.01)
CPC F03D 3/005 (2013.01) [F03D 3/062 (2013.01); F03D 9/25 (2016.05); F03D 13/2005 (2023.08); F03D 13/256 (2023.08); F05B 2240/93 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A vertical axis multi-stage wind turbine generator comprising:
a stationary shaft (110) built vertically;
a rotary shaft (120) coupled to the stationary shaft (110) in multiple stages;
at least two rotor blades (130) coupled to the rotary shaft (120);
a wind hole (140) defined in each of the rotor blades (130);
a ball net (150) provided on the rotor blade (130) so as to communicate with the wind hole (140) and protrude from both sides of the wind hole (140);
a wind hole opening/closing ball (160) which is inserted into the ball net (150) and slidable by a wind pressure, wherein in a case in which the rotor blade (130) rotates, when a forward wind pressure acts, the wind hole opening/closing ball (160) slides toward the wind hole (140) to close the wind hole (140), and when a reverse wind pressure acts, the wind hole opening/closing ball (160) slides in an opposite direction to the wind hole (140) to open the closed wind hole (140); and
a power generating device (M) engaged with the rotary shaft (120) to generate electricity.