Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V.
发明人:
申请号：
EP17166356.0
公开号：
EP3388013A1
申请日:
2017.04.12
申请国别(地区):
EP
年份:
2018
代理人:
摘要：
A method in which a propeller (1) is set into locomotion relative to a medium (2) which at least partially surrounds the propeller (1), wherein an actuator induces a rotation of the propeller (1) relative to the medium (2) and about a rotational axis (4) of the propeller (1), and wherein the propeller (1) converts its rotational movement into locomotion of the propeller (1) relative to the medium (2). The aspect ratio of at least one cross section (5) of the propeller (1), which cross section (5) is a cross section (5) related to the propeller's (1) rotational axis (4), is 3 or more, or the aspect ratio of at least one cross section of the rotating body that comprises the propeller (1) and the parts (10) of the medium that due to the rotation the propeller (1) have been severed from the remainder of the medium (2) and rotate with the propeller (1), which cross section is a cross section related to the rotating body's rotational axis (4), is 3 or more. Moreover, a helical or modifiedly helical propeller (1) for converting rotational movement of the propeller (1) into locomotion of the propeller (1) relative to a medium (2) which at least partially surrounds the propeller (1), wherein the aspect ratio of at least one cross section (5) of the propeller (1), which cross section (5) is a cross section (5) related to the propeller's (1) helical axis, is 3 or more. And a method of producing a propeller (1), the method comprises the steps of (1) defining a straight helical axis； (2) providing a plate (17) extending along the helical axis, the aspect ratio of at least one cross section (5) of the plate, which cross section is a cross section (5) related to the helical axis, is 3 or more； and (3) applying to the plate (17) a torque along the helical axis, thereby twisting the plate (17) into helical shape.
