JPH077278Y2 - Ship screw - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw for propelling a ship.

[0002]

2. Description of the Related Art A conventional screw has a problem that it pushes water backward in a radial direction, so that turbulent flow is generated in the rear part to reduce propulsion efficiency.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a screw which can prevent turbulent flow of water and enhance propulsion efficiency.

[0004]

Means for Solving the Problems According to the means of the present invention, a plurality of vanes composed of arc pieces of the same circumference are led out in an expanded manner around an insertion ring on a rotary shaft, and the tips of the vanes are extended. Is connected to a large-diameter annulus, radial blades are projected on each vane, and a plurality of inward auxiliary wings are attached to the inner surface of the large-diameter annulus at regular intervals.

[0005]

The blades rotate with the rotation of the rotating shaft to propel the hull by the radial blades and the auxiliary blades, and the portion surrounded by the blades prevents turbulent water flow, There is an effect that works smoothly except for the obstruction of propulsion by.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 in the drawing is an insertion ring having an insertion hole 2 for a rotary shaft, and four arcuate blades 3 on the same circumference are provided on the front surface of the insertion ring in an expanded manner. The tip of each blade 3 is connected to a ring 4 having a large diameter. Radial winglets 5 on each vane 3
And eight inward auxiliary wings 6 are attached to the inner surface of the circular ring 4 at a constant interval.

[0007]

According to the present invention, the blades 3 on the same cylinder rotate with the rotation of the rotating shaft to prevent the turbulent flow of water surrounded by the blades and to form the radial blades 5. Since the auxiliary blade 6 is rotated and propelled, a highly efficient screw is obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a front view.

[Explanation of symbols]

 1 Insertion Ring 2 Insertion Hole 3 Blade Plate 4 Large Diameter Ring 5 Radial Blade 6 Auxiliary Wing 14 Wing 20 Turbulence Preventing Piece 21 Turbulence Preventing Piece 22 Turbulence Preventing Piece 30 Auxiliary Blade

Claims (1)

[Scope of utility model registration request] 1. A plurality of arcuate blades having the same circumference are provided on a front surface of a ring attached to a rotary shaft so as to have a tip in a widened manner at predetermined intervals, and each of the arcuate blades is formed. A large-diameter circular ring is continuously provided at the tip, and a wing piece is projectingly provided on one side edge of the arcuate blade, and a plurality of auxiliary vanes are inwardly arranged at regular intervals on the inner surface of the circular ring. A screw for ships characterized by being attached.