JPS5889492A - Stern boss integrated reaction fin - Google Patents

Abstract

PURPOSE:To simplify the structure by molding a ring strut and a fin blade integrally with a stern boss thereby eliminating a route boss ring. CONSTITUTION:In front of a stern propeller, a plurality of finblades 1b are arranged radially from a stern bass 2 in order to control the direction of the water flow to said propeller thus to improve the propulsion efficiency, while the ring strut 1a for supporting the outer end of said finblade 1b is fixed through a fixing member 1d to the hull. The ring strut 1a and the finblade 1b are manufactured as a casting integrated with the stern boss 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reactive fin provided at the stern of a ship.

Conventional reactor fins for ships include the one shown in Figure 1, which is attached to the stern propeller (not shown).
In front of the ship, the reactor fin 1 attached to the hull has a plurality of radial fin blades 11) whose outer ends are supported by the ring struts 1a, and a route connecting the inner ends of these fin blades 11). Boss ring 1 (consists of

These ring struts 1a, fin blades 11), and root boss ring 1c are manufactured as an integral casting, and the root boss ring lc2 is connected to the stern boss 2.
It is attached to the hull by welding so that it is fitted into the hull.

However, in such a conventional rear axis fin, the root boss ring 1c has 9 axis fins 1.
It exists only to maintain the shape during casting and to attach to the stern boss 2, and functions as a rear axle fin.
Moreover, the welding part between the root boss ring 1c and the stern boss 2 requires a lot of effort in welding work, and also requires consideration of strength.

The present invention aims to solve these problems.
- To provide a reaction fin which simplifies the structure by omitting a continuous root boss ring, and which can be manufactured by integral molding without any trouble.

For this reason, the glue axitan fin of the present invention has a plurality of fin blades arranged radially from the stern boss in front of the stern propeller in order to control the direction of the water flow flowing into the propeller, and these fin blades. a ring strut supporting the outer end and attached to the hull;
The above-mentioned ring strut and fin blade are characterized in that they are integrally molded with the above-mentioned stern boss.

Hereinafter, a stern boss-integrated reaction fin as an embodiment of the present invention will be explained with reference to the drawings. FIG. 3 is a perspective view thereof.

In front of the stern propeller (not shown), a plurality of fin blades 11) are arranged radially from the stern boss 2 so as to control the direction of the water flow flowing into the propeller and increase propulsion efficiency. , these fin blades 1b
The ring strut (la) supporting the outer end of the mounting member 1
It is designed to be attached to the ship's hull via 3-d.

Then, the ring strut 1a and the fin blade 1
1) is manufactured as a casting integrally formed with the stern boss 2.

Therefore, the conventional root boss ring lc (see Figures 1 and 2) is omitted, which not only simplifies the structure but also reduces weight. Welding work with the boss 2 is also no longer necessary.

Note that the stern boss 2 is attached to the hull by welding or the like as in the conventional case, and supports the propeller shaft 7) via a bearing (not shown).

As described in detail below, according to the stern boss-integrated reaction fin of the present invention, the inner ends of the radially arranged fin blades 11) are integrally molded with the stern boss 2. You can get an effect like this.

(1) The conventional root boss ring is no longer necessary and can be removed to reduce weight.

(2) Even if the root boss ring is discarded, the inner end of the fin plate is integrally molded with the stern boss, so there is no problem in maintaining the shape during casting.

(3) Since welding work between the root boss ring and the stern boss is eliminated, the amount of work is reduced, and reliability is also improved due to the reduction in the number of welded parts.

[Brief explanation of the drawing]

1 and 2 show a conventional stern reaction fin, FIG. 1 is a perspective view thereof, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a stern boss as an embodiment of the present invention. FIG. 2 is a perspective view showing a body type rear axis. 1... Reaction fin, 1a... Ring strut, 1b... Fin blade, IC... Root boss ring, 1d... Mounting member, 2... Stern boss. Sub-Agent Patent Attorney Yoshihiko Iinuma 5- Figure 1

Claims (1)

[Claims] In front of the stern propeller, a plurality of fin blades are arranged radially from the stern boss in order to control the direction of the water flow into the propeller, and the outer ends of these fin blades are supported and attached to the hull. A stern boss-integrated reactant fin comprising: a stern boss-integrated ring strut, wherein the ring strut and the fin blade are integrally molded with the stern boss.