agitated water jet propulsion

Abstract

The invention provides an agitating water jet propeller which comprises a water jet barrel, a reciprocating type spindle, a rotating shaft and vanes. The water jet barrel comprises a straight barrel portion and a horn barrel portion, wherein water inlets are formed in the horn barrel portion, the large end of the horn barrel portion is fixed to one end of a ship body, and the small end of the horn barrel portion is connected with the horn barrel portion. The end of the reciprocating type spindle is connected with the middle of the rotating shaft, two slide grooves are formed in the inner wall of the straight barrel portion, and the two ends of the rotating shaft are respectively arranged in the two slide grooves. The vanes comprise the first vane and the second vane, wherein the first vane and the second vane are connected through a connecting piece, the first vane and the second vane can rotate relative to the connecting piece, two connecting rings are arranged on the connecting piece, and the connecting piece sleeves the rotating shaft through the connecting rings. The agitating water jet propeller can avoid effects of stern wake on the premise of guaranteeing ship navigation performance, can push water flow to move backwards in the axial direction, can avoid horizontal flow, reduces energy loss and improves the propelling efficiency.

Description

technical field [0001] The present invention relates to a ship device, in particular a ship propeller. Background technique [0002] The propeller makes a rotating motion, which makes the fluid rotate while pushing the fluid backward. Propelling the fluid backwards is necessary for the propeller to generate thrust, and the rotational motion of the wake is a complete waste of energy. The energy consumed by the wake rotation motion can usually reach more than 15% of the main engine power. In addition, ordinary propellers generally have high speed and high noise, and the large water-facing area produces greater resistance to ships, and the process is complex and difficult to manufacture. In recent years, water jet propulsion has achieved remarkable development. Compared with conventional propellers, water jet propulsion has superior anti-cavitation performance and low noise. However, the propulsion efficiency of water jet propulsion is generally low. [0003] There are many...

AI Technical Summary

Problems solved by technology

The propeller designed by this mechanism is efficient, but there are still some deficiencies. Firstly, due to the forward movement of the hull, when the propeller is opened, it will generate greater resistance when traveling against the current. Secondly, in the process of "sumo and tension" , it is easy to generate transverse flow, which is the same as the propeller rotating flow, and it is also a kind of energy loss

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