A sea lion-like front fin propulsion device

Abstract

The invention discloses a sea lion imitation front fin propulsion device. The mechanism comprises a base unit, a drive unit, a swing plate mechanism, a space crank rocker mechanism and a sea lion imitation flexible front fin unit. The drive unit drives the oscillating plate mechanism and the space crank-rocker mechanism in series, so that the imitation sea lion front fin unit can imitate the movement characteristics of the sea lion front fin and the propulsion principle based on both lift and drag. At the same time, the device has an elliptical motion trajectory similar to that of the sea lion's front fin and a periodic change in the angle of attack of the front fin, which has high propulsion efficiency and maneuverability. The sea lion-like flexible front fin unit has similar bone density, shape and flexibility characteristics to the sea lion front fin, has good hydrodynamic characteristics, and improves propulsion efficiency. The invention can adjust the movement trajectory, turning direction, power characteristics and thrust of the mechanism in various aspects, so as to adapt to different underwater movement conditions. In addition, through adjustment, the device of the present invention can generate a motion trajectory similar to the "8" shape of the turtle's forelimb.

Description

technical field [0001] The invention relates to the technical field of bionic underwater vehicle propulsion, more specifically, the invention relates to a high-efficiency bionic propulsion device with motion characteristics of imitating sea lion front fins. Background technique [0002] With the expansion of the application field of underwater vehicles, underwater vehicles are required to have better motion performance, so new challenges are also posed to their propulsion technology. Flexible bionic propulsion technology has become a current research hotspot and frontier. The locomotive ability of existing underwater vehicles is still far behind that of natural aquatic animals, and part of the reason for these gaps is due to the limitations of underwater vehicle propulsion technology. The current mainstream propulsion technology still uses the propeller as the propulsion device. Although propeller propulsion can generate reliable and stable thrust, it is not ideal in terms o...

AI Technical Summary

Problems solved by technology

The locomotive capabilities of existing underwater vehicles still lag far behind those of natural aquatic animals, and these gaps are partly due to the limitations of underwater vehicle propulsion technology

The current mainstream propulsion technology still uses the propeller as the propulsion device. Although propeller propulsion can generate reliable and stable thrust, it is not ideal in terms of propulsion efficiency, noise and wake control, and it is difficult to meet diverse ocean exploration tasks.

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