Supercharged empty hub propeller for ship

Abstract

The invention discloses a supercharged empty hub propeller for a ship, which comprises an empty hub motor, a front flow guide cover and a rear flow guide cover, and the empty hub motor comprises a shell, a flow guide box, a motor stator and a motor rotor; at least three clutch seats are arranged on the inner wall of the flow guide box; a clutch gear ring is arranged on each clutch seat, a clutch positioning column is arranged on each clutch seat, an adjusting fluted disc and a paddle unit are arranged on each clutch positioning column, an upper gear ring meshed with the corresponding clutch gear ring is arranged on each adjusting fluted disc, two arc-shaped first adjusting holes are formed in each adjusting fluted disc, and threaded positioning holes matched with the two first adjusting holes are formed in each clutch seat; a lower gear ring is arranged on each adjusting fluted disc; each paddle unit comprises a blade mounting seat and a driving blade, arc-shaped second adjusting holesmatched with the two first adjusting holes are formed in each blade mounting seat, a blade mounting base matched with the lower gear ring is arranged on each blade mounting seat, and two locking screws are embedded into the two threaded positioning holes respectively so as to position and lock the corresponding paddle unit and adjusting fluted disc.

Description

technical field [0001] The invention relates to a ship propulsion device, in particular to an underwater hollow hub propulsion device. It belongs to the technical field of ship propulsion. Background technique [0002] With the advancement of my country's ocean development technology and the development of the ship industry, my country's requirements for underwater propellers have also been greatly improved. The traditional underwater propeller is a propeller with a hub installed on the motor shaft. When the motor drives the propeller to rotate The water flows in from the front of the motor, and the motor produces head-on resistance to the blades. When the propeller tip rotates, induced resistance and cavitation occur, which reduces the efficiency of the propeller. In addition, due to the long rotation of the output shaft of the traditional underwater motor, the propeller will also generate radial vibration when rotating, which reduces the efficiency of the entire propeller....

AI Technical Summary

Problems solved by technology

In product production, the design of the propeller's helix angle is based on the drawings, and the optimal helix angle is obtained through theoretical calculation. Due to the error between the actual ship and the theoretical design, the optimal helix angle of the actual ship during driving and the theoretical design cannot be determined. Completely match, sometimes the error is relatively large

When the propeller pitch angle is large, the motor torque increases, which will easily cause the motor to stall; if the propeller pitch angle is small, the rated power of the motor cannot be fully absorbed by the propeller, resulting in reactive power, which also reduces the working efficiency of the motor. Will affect the quality of the power grid in the ship power station

[0004] Although the above problems can be solved by adjustable propellers, the adjustable propeller mechanism is complicated and expensive, especially the inner hole of the motor rotor of the hollow hub propulsion device is the installation hole of the propeller, so there is no space to install the adjustable propeller blade rotation mechanism

[0005] In addition, usually in the hollow-hub propulsion device, the diversion box in the rotor of the propulsion motor is a straight channel, that is, the diameter of the diversion box is the same at the front and rear. The speed will be increased. Since the water flow into the diversion box is equal to the water output, the outlet water column of the diversion box will be smaller than the inlet water column. Since the propeller sends the water out through the rotation inertia, the rotating water flows out of the guide box that is larger than the diameter of the water column. When the flow box is closed, expansion will inevitably occur, resulting in a decrease in the flow rate and water pressure of the outlet water, thereby reducing the propulsion efficiency

[0006] To sum up, at present, the internal propellers of the motor rotors of hollow-hub propellers are all fixed installations, and once manufactured, they cannot be changed. Therefore, there are manufacturing errors such as ship types, and the propellers cannot be adjusted. The propellers and ship types are in one-to-one correspondence. relationship, one type of propeller can only be used for one type of ship, thus affecting its efficiency and range of use,

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