2 results about "Rotation around a fixed axis" patented technology

Eccentric screw pump with a rotor of a drive shaft circulating essentially about a fixed axis in relation to the stator in a bearing block, a power train and a screw conveyor, which revolves in a rotating-oscillating manner in a screw flight of the stator, wherein the power train provides the screw conveyor with its drive torque and the power train adjusts the differences of the motion sequences of the screw conveyor and of the drive shaft, wherein the power train consists essentially of a one-piece rotational body, which has multiple weakening recesses, which interrupt its outer circumferential jacket surface more than only insignificantly and which provide it with that reversible elasticity, which it requires in order to rotate about an axis of rotation, which curves in a periodically recurring manner at least in sections.

This invention belongs to the field of unmanned aerial vehicle (UAV) technology, specifically relating to a method for positioning the deployment axis of a foldable UAV wing surface. The method includes the following steps: S1, designing the aerodynamic shape of the deployed state according to the UAV's cruise conditions, and designing the dihedral angle and mounting angle of the wing surface according to maneuverability and stability; S2, designing the position of the wing surface in the folded state according to structural design requirements; S3, calculating the spatial orientation of a fixed rotation axis from the folded position to the deployed position, achieving the required dihedral angle and mounting angle of the wing or V-tail with a single rotation around the fixed axis from the folded position. This invention has the advantages that when the wing surface is folded, it fits tightly against the fuselage surface; when the wing surface is deployed, only one rotation around a fixed axis is needed to achieve the required dihedral angle and mounting angle for aerodynamic design.