Vortex elimination fin structure with detachable fins

Abstract

A vortex elimination fin structure with detachable fins comprises a flow guide body, a cavity is formed in the flow guide body, four or five grooves with one open end are formed in the outer portion of the flow guide body, the fins are installed in the grooves, a round hole is formed in the rear side of the flow guide body, a flange is arranged on the front side of the flow guide body, and a sealing groove is formed in the end face of the flange. When the propeller is installed on the propeller shaft and pressed through a fixing nut, the flow guide body is installed on the propeller hub through the bolt, grease is injected through the round hole in the rear end of the flow guide body, the rear end cover is used for sealing after the flow guide body is filled with the grease, and the situation that seawater corrodes parts, and consequently the propeller is difficult to disassemble is prevented. And finally, the fins are installed in the grooves of the flow guide body and fixed through stainless steel screws. The device has the advantages of being simple in structure, convenient to machine and manufacture, low in cost, easy to maintain, capable of reducing capacity loss of rotating water flow on the rear side of the propeller, reducing exciting force and noise of wake flow of the propeller, further reducing oil consumption of a main engine, improving ship propelling performance and the like.

Description

technical field [0001] The invention relates to a vortex-eliminating fin structure with detachable fin blades, belonging to the technical field of ship propulsion. Background technique [0002] With the continuous development of ship propulsion technology, high-power, high-speed engines have been widely used in ships. Correspondingly, the rotational speed of the propeller is getting higher and higher, so that the problem of rotational energy loss in the propeller wake becomes more prominent. In addition, as the requirements for vibration and noise reduction are getting higher and higher, the problem of vibration and noise induced by propeller wakes needs to be solved urgently. In order to reduce this energy loss, reduce the fuel consumption of the engine, and make the ship more environmentally friendly, the additional devices installed before and after the propeller have been used in various ships. At present, in the traditional additional devices, the ordinary diversion c...

AI Technical Summary

Problems solved by technology

At present, in the traditional additional devices, the ordinary diversion cap structure does not have fins and has no energy-saving effect; while the new type of vortex-eliminating fins with fins, the fins and vortex-eliminating fins are integrally constructed, the structure is complex, and the manufacturing cost High, only applied to some large ships

When the fin blades are damaged, in order to protect the propeller shaft from seawater corrosion, the vortex-eliminating fins of this type of one-piece structure need to be replaced when the ship goes ashore, and the maintenance cost is relatively high.

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