JP3322545B2 - Propeller device with marine stator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propeller device with a marine stator having a stator behind a screw propeller of a marine vessel for changing a swirling flow from the propeller into a linear flow.

[0002]

2. Description of the Related Art In a conventional propeller device with a marine stator, a radial stator fin 4 as shown in FIG. 3 is disposed behind a screw propeller (not shown) so as to project from a boss 5. The stator fins 4 are inclined or twisted to change the swirling flow in the wake of the propeller into a linear flow.

[0003]

By the way, in the propeller apparatus with a marine stator as described above, the function of changing the swirling flow into a straight flow is obtained for the propeller wake passing between the adjacent stator fins 4. Not done at all. Therefore, it is desirable to increase the number of the stator fins 4. However, since the stator fin 4 is attached to the boss 5, the number of the stator fins is limited.

[0004] If the diameter of the boss 5 is increased, the number of the stator fins 4 can be increased, but the length of the stator fins 4 in the radial direction is reduced, and the function of converting the swirling flow in the wake of the propeller into a linear flow. Is reduced. The present invention
In order to solve such a problem, the number of stator fins is increased without increasing the diameter of the boss, and the function of converting the swirling flow in the wake of the propeller into a linear flow is sufficiently provided. It is an object of the present invention to provide a marine stator-equipped propeller device that can be enhanced.

[0005]

In order to achieve the above-mentioned object, a propeller device with a marine stator according to the present invention converts a swirling flow in a wake of the propeller into a linear flow behind a screw propeller mounted on a stern. A stator comprising a plurality of inclined or twisted stator fins for changing is provided, and the stator is provided with an annular member arranged concentrically with a boss at the center of the stator. An inner stator fin radially projecting from the boss and reaching the annular member, and an outer stator fin radially projecting outward from the annular member, and the number of the outer stator fins the outer stearyl to but is set to be larger than the number of the inner stator fin, upper SL on the extension of the inner stator fin With Tafin is provided as an extension fin, the outer stator fins also between each other the extension fin is disposed as an additional fins to be mounted proximal to said annular member, said inner stearate
-The fin is integrated with the extension fin.
The ring member is formed and attached to the same fin.
It is characterized by having been.

In the above-described propeller device with a marine stator,
Since the diameter of the annular member is sufficiently larger than that of the boss, the number of outer stator fins projecting outward from the annular member is reduced by the number of inner stators radially projected from the boss. The number of stator fins can be set larger than the number of stator fins, whereby the function of converting the swirling flow in the wake of the propeller into a linear flow can be efficiently performed.

Further, since the outer fin is provided as an extension fin on the extension of the inner stator fin, efficiently effect of changing the linear flow of the swirling flow in the propeller slipstream and the and extension fins cooperate with the inner stator fins Since there is an additional fin as another outer stator fin between the extension fins,
Higher performance than conventional stators can be obtained.

[0008] Then, the integral fin is one that corresponds to the conventional stator fins, this is attached the circular member, the aforementioned structure in which the additional fin is attached to the annular member, remodeling of a conventional stator There is an advantage that can be realized more easily.

Further, in the propeller device with a marine stator according to the present invention, the boss is mounted on a front surface of a rudder horn protruding downward from the stern hull, and an auxiliary support member for connecting the annular member to the rudder horn. Is provided. Thus, when the annular member is connected to the stern rudder horn via the auxiliary support member,
The mounting strength of the entire stator is improved.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a stern equipped with a marine stator according to an embodiment of the present invention; FIG. FIG.

As shown in FIGS. 1 and 2, a large number of inclined or twisted stator fins are provided behind a screw propeller 2 mounted on the stern to change the swirling flow in the wake of the propeller into a linear flow. 4 is provided, and the stator is provided with an annular member 10 arranged concentrically with the boss 5 at the center thereof. Boss 5
Is mounted on the front surface of a rudder horn 1a protruding downward from the stern hull 1, and the stator fins 4 are inner stator fins 4c extending from the boss 5 to the annular member 10, and outward from the annular member 10. Outer stator fins 4a and 4b project radially, and the number of outer stator fins 4a and 4b is set to be greater than the number of inner stator fins 4c.

In this embodiment, the inner stator fin 4
c are provided, whereas 12 outer stator fins 4a and 4b are provided, and six outer stator fins 4a as extension fins arranged on the extension of the inner stator fin 4c are provided. , The fin 4a
There are six outer stator fins 4b as additional fins projecting radially outward from the annular member 10 between each other. In addition, the inner stator fin 4c and the outer stator fin 4a as an extension fin thereof may be formed as an integral fin having an integral structure.
The annular member 10 is attached to these integral fins 4a, 4c. The ring member 10 is connected to the rudder horn 1a via an auxiliary support member 10a.

Since the propeller device with a marine stator according to the present embodiment is constructed as described above, when the marine vessel is moving forward with the rotation operation of the screw propeller 2, the propeller as the wake of the screw propeller 2 is provided. The swirling flow is twisted back by the stator fins 4 and becomes a linear flow, and is further rectified by the rudder 3 supported by the rudder horn 1a.

At this time, the stator fin 4 is
Although the inner stator fins 4c provided inside are arranged at the same density as the corresponding portions of the conventional stator fins, the outer stator fins 4a and 4b provided outside the annular member 10 are not provided with the same density. Since the stator fins 4 are arranged more densely than the corresponding portions of the conventional stator fins, the swirling flow in the wake of the propeller is more efficiently captured and converted into a linear flow than the conventional one, as viewed from the overall operation of the stator fins 4. As a result, the efficiency of converting turning energy in the wake of the propeller into thrust is improved.

When the outer stator fin 4a is provided as an extension fin on the extension of the inner stator fin 4c, the inner stator fin 4c and the outer stator fin 4a as the extension fin cooperate to form a swirl flow in the wake of the propeller. Is converted efficiently into a linear flow, and the outer stator fin 4b as another additional fin exists between the extension fins. Can be.

In a structure in which the inner stator fin 4c and the outer stator fin 4a as an extension fin thereof are formed as an integral fin, and the annular member 10 is mounted thereon, the conventional stator has an annular member.
Only the attachment of the outer stator fins 4b and the outer stator fins 4b as additional fins makes it possible to easily apply the present invention. Further, when the annular member 10 is connected to the stern rudder horn 1a via the auxiliary support member 10a, the mounting strength of the entire stator is increased.

[0017]

As described above, according to the propeller apparatus with a marine stator of the present invention, the following effects can be obtained. (1) Since the outer stator fins provided radially outward from the annular member can be densely arranged, the function of converting the turning energy in the wake of the propeller into a thrust is achieved.
It is performed more efficiently than in the conventional case. (2) Since the outer stator fins on the extension of the inner stator fins extending from the boss to the annular member is provided as an extension fin, straight a swirling flow in the propeller slipstream and the and extension fins cooperate with the inner stator fins Since the effect of changing the flow to the flow is efficiently performed, and the additional fins serving as the outer stator fins exist between the extension fins, higher performance can be obtained as compared with the conventional stator. (3) inner stator fin and its by the outer stator fin as an extension fins are formed as an integral fins or this is the circular member is attached, and the outer stator fins as an additional fin an annular member in the conventional stator Is simply attached, so that the application of the present invention can be easily realized on an existing stator. (4) When the annular member is connected to the stern rudder horn via the auxiliary support member, the mounting strength of the entire stator is increased.

[Brief description of the drawings]

FIG. 1 is a side view of a stern including a propeller device with a marine stator according to an embodiment of the present invention.

FIG. 2 is a front view taken along the line AA of FIG. 1;

FIG. 3 is a front view showing a conventional marine stator.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Stern hull 1a Rudder horn 2 Screw propeller 3 Rudder 4 Stator fin 4a, 4b Outer stator fin 4c Inner stator fin 5 Boss 10 Ring member 10a Auxiliary support member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B63H 1/28

Claims (2)

(57) [Claims] 1. A stator comprising a plurality of inclined or twisted stator fins for changing a swirling flow in a wake of the propeller into a straight flow behind a screw propeller mounted on the stern. An annular stator member is provided concentrically with a boss at the center of the stator, and the stator fins radially protrude from the boss to an inner stator fin reaching the annular member; from the annular member outwardly consists of an outer stator fins projecting radially, the number of the outer stator fins is set to be larger than the number of the inner stator fin, the inner stearate
The outer stator fin extends over the extension of the
Provided as long fins,
The outer stator fins are attached to the annular member
Arranged as additional fins with the base end attached
And the inner stator fin is
Formed as one-piece fin,
A propeller device with a marine stator, wherein the annular member is attached . 2. The propeller device with a marine stator according to claim 1, wherein the boss is mounted on a front surface of a rudder horn protruding downward from a stern hull, and the annular member is connected to the rudder horn. A propeller device with a marine stator, wherein an auxiliary support member is provided.