Coaxial contra-rotating circumferential thruster

A coaxial contra-rotating circumferential thruster, composed of an input end, a one-way commutator, a two-way deflector, a steering support and two output ends, wherein

• power from a power device is input at the input end, and the input end is connected at the rear to a co-directional shaft;
• there are four types of the one-way commutator, one of which is selected:
• a first type of the one-way commutator, comprises the co-directional shaft, a front bevel gear, a reversing bevel gear, a reversing bevel gear support, a rear bevel gear and a contra-rotating sleeve shaft;
• a bearing of the co-directional shaft is provided to be fixed, and the front bevel gear is provided on the co-directional shaft, the reversing bevel gear whose support is fixed is provided to be engaged with the front bevel gear;
• an axis of the reversing bevel gear is perpendicular to an axis of the co-directional shaft, and the reversing bevel gear is connected to a shaft lever, and the bearing thereof is fixed as a support;
• the contra-rotating sleeve shaft is provided to be located on the same axis as the co-directional shaft, a bearing of the contra-rotating sleeve shaft is fixed, the rear bevel gear is provided to be engaged with the reversing bevel gear on an outer shaft of the contra-rotating sleeve shaft, the co-directional shaft is directly connected to an inner shaft of the contra-rotating sleeve shaft, and the front bevel gear is indirectly connected to the rear bevel gear by means of the reversing bevel gear;
• the number of teeth of the front bevel gear is set to be equal to the number of teeth of the rear bevel gear, such that a transmission ratio of this indirect connection is equal to −1.0;
• the first type of the one-way commutator makes the inner shaft of the contra-rotating sleeve shaft and the outer shaft of the contra-rotating sleeve shaft have the same rotation speed and opposite rotation directions;
• the two-way deflector comprises a first driving bevel gear, a first driven bevel gear, a first output shaft, a second driving bevel gear, a second driven bevel gear and a second output shaft;
• the first driving bevel gear is provided on the inner shaft of the contra-rotating sleeve shaft, an axis of the first output shaft is provided to intersect with an axis of the contra-rotating sleeve shaft, and the included angle of the intersection is a first deflecting angle, the first driven bevel gear is provided on the first output shaft to keep the first driving bevel gear engaged with the first driven bevel gear;
• and the second driving bevel gear is provided on the outer shaft of the contra-rotating sleeve shaft, an axis of the second output shaft is provided to intersect with the axis of the contra-rotating sleeve shaft, and the included angle of the intersection is a second deflecting angle, the second driven bevel gear is provided on the second output shaft to keep the second driving bevel gear engaged with the second driven bevel gear;
• the steering support comprises a shaft-fixed component, a bracket and a shaft-movable bearing;
• the shaft-fixed component is a machine that is turned around the axis of the contra-rotating sleeve shaft, there are three types of the shaft-fixed component in the steering support, one of which is selected:
• a first type of the shaft-fixed component is a bearing that is provided on the periphery of the contra-rotating sleeve shaft, the bearing supports the contra-rotating sleeve shaft;
• and the shaft-movable bearing is a bearing that supports the output sleeve shaft, and is provided on the periphery of the output sleeve shaft, the first output shaft is supported by the first shaft-movable bearing which is provided on the periphery of the first output shaft, and the second output shaft is supported by the second shaft-movable bearing which is provided on the periphery of the second output shaft;
• when the two output shafts form a special case of the output sleeve shaft, the first shaft-movable bearing and the second shaft-movable bearing are combined into a shaft-movable bearing that supports the output sleeve shaft and is provided on the periphery of the output sleeve shaft;
• the bracket is a connecting machine that directly connects the shaft-fixed component to all the shaft-movable bearings, the direct connection makes the rotation speed of the steering support unchanged;
• when the bracket directly connects the shaft-fixed component to all the shaft-movable bearings, the entire steering support can be turned around the axis of the contra-rotating sleeve shaft, the steering support is directly or indirectly connected to the turnaround control device, and is turned around under the control of the turnaround control device;
• the two output ends are respectively a first output end and a second output end, the output shaft where the first output end is located is the first output shaft, and the output shaft where the second output end is located is the second output shaft;
• the two output ends are respectively connected to the two propellers (or rotors);
• and when the two output shafts form a special case of the output sleeve shaft, the two output ends are respectively connected to the two propellers (or rotors) of the coaxial contra-rotating double-propeller (or rotor);
• with respect to the coaxial contra-rotating circumferential thruster of the present invention, the turnaround control device controls the steering support to be turned around, drives the two output ends to be turned around, and drives the two propellers to be turned around;
• the control torque required for co-rotating and contra-rotating during turnaround is the same, the turnaround control torque is very small, and the control device is very small.