Propelling device imitating front fins of sea lion

Abstract

The invention discloses a propelling device imitating front fins of a sea lion. The propelling device comprises a base unit, a driving unit, wobble plate mechanisms, space crank rocker mechanisms andflexible units imitating the front fins of the sea lion. The driving unit drives the wobble plate mechanisms and the space crank rocker mechanisms which are connected in series so that the flexible units imitating the front fins of the sea lion can imitate the movement characteristics of the front fins of the sea lion and the propelling principle based on both lift force and resistance. And meanwhile, the device has an oval movement trail similar to that of the front fins of the sea lion and periodic change of the front fin attack angles, and has high propelling efficiency and maneuverability.The flexible units imitating the front fins of the sea lion have the bone density, appearance and flexibility characteristics similar to those of the front fins of the sea lion, have the good hydrodynamic characteristic and improve the propelling efficiency. According to the propelling device, the movement track, the turning direction, the power characteristics and the thrust of the mechanism canbe adjusted in multiple aspects so that the device can adapt to different underwater movement conditions. In addition, through adjustment, the device can generate a movement trail similar to an 8 shape of the forelimbs of a sea turtle.

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.

Images