JP2017177885A - Rudder plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rudder plate capable of suppressing generation of vibrations of the rudder plate itself by an eddy current separated from a rear edge part of the rudder plate during navigation of a craft, without the use of a particular member.SOLUTION: A rudder plate 3 of the present invention includes a first rudder surface (starboard-side rudder plate 4) that constitutes one of front and back sides, and a second rudder surface (port-side rudder plate 5) that constitutes the other one of the front and back sides. At least one of the first and second rudder surfaces has a plurality of plate materials intermittently joined together by a connection band that is formed by making the adjacent plate materials overlap each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a steering plate constituting a steering machine that steers a traveling body such as a ship.

  As an example of a conventional steering machine, for example, as disclosed in Patent Document 1, hydraulic oil discharged from a hydraulic pump driven by an electric motor is supplied to a ram, and a steering handle (chiller) connected to the ram. By operating the steering wheel, the rudder shaft directly connected to the rudder plate is rotated, and the rudder plate is rotated to a desired angle to steer the ship.

  Patent Document 1 lists vibration and noise generated by a rotating device such as an electric motor for operating a hydraulic pump as problems, and prevents the generation of vibration and noise by enabling the rudder shaft to be rotationally driven by electromagnetic force. Proposal to make.

JP 2002-21490 A

  In a ship, not only vibration generated by an electric motor as a driving source but also a rudder plate itself generates vibration during navigation of the ship. In particular, the vibration of the rudder plate is excited by the eddy current separating from the rear edge of the rudder plate, which becomes a cause of noise.

  Then, an object of this invention is to provide the steering plate which can suppress generation | occurrence | production of a vibration, without using a special member.

  In order to achieve the object, the present inventors have examined the use of frictional force. That is, the gist of the present invention is to suppress the vibration generated from the steering plate by consuming the vibration energy as the friction energy by generating friction in the steering plate by the vibration generated in the steering plate. In the present invention, in order to generate a frictional force, at least one control surface on the front and back sides of the steering plate is constituted by a plurality of plate members, and joints in which adjacent plate members are laminated are intermittently joined.

  That is, the control plate of the present invention has a first control surface that constitutes one of the front and back surfaces, and a second control surface that constitutes the other of the front and back surfaces, and at least one of the first control surface and the second control surface is A plurality of plate members are intermittently joined with a connection band formed by overlapping adjacent plate members.

  In the rudder plate of the present invention, it is preferable that the connection band extends along the vertical direction or the horizontal direction.

  In the rudder plate of the present invention, it is preferable that the intermittent connection is fastening with intervals or spot welding with intervals.

  In the rudder plate of the present invention, it is preferable that a damping material is attached to one or both of the first rudder surface and the second rudder surface.

  According to the rudder plate of the present invention, adjacent plate materials are intermittently bonded to each other, so that the adjacent plate materials can be relatively displaced within a minute amount in the unbonded portions. Along with this relative displacement, a frictional force is generated in the overlapped region of adjacent plate members, so that vibration from the steering plate can be suppressed.

It is a side view which shows schematic structure of the rudder which concerns on embodiment of this invention. It is a perspective view which shows the principal part of embodiment of FIG. (A) is the AA line partial expanded sectional view which shows the one part schematic structure of FIG. 2, (b) is the AA line part which shows the other one part schematic structure of FIG. It is an expanded sectional view, (c) is a BB line partial sectional view of (a). It is a perspective view which shows other embodiment of this invention. It is a perspective view which shows other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, taking a ship 90 as an example.

[First embodiment]
As shown in FIG. 1, the ship 90 is provided on the front side U of the hull 91 and protrudes from the stern 92 to the rear side L, a bow not shown, a stern 92 provided on the rear side L of the hull 91, and the rear side L. The screw propeller 93 and the rudder 1 arranged on the rear side L from the screw propeller 93 are provided. The rudder 1 changes the course direction of the ship 90 by swinging in the circumferential direction of the vertical direction D.
In the present embodiment, the front side U and the rear side L indicate a relative positional relationship.

As shown in FIG. 2, the rudder 1 according to the present embodiment includes a rudder plate 3 and a rudder member 2 that connects the hull 91 and the rudder plate 3.
The rudder plate 3 is a starboard side rudder plate 4 that is a first rudder surface that constitutes one of the front and back sides, a starboard side rudder plate 5 that is a second rudder surface that constitutes the other side of the front and back sides, a starboard side rudder plate 4 and a port side. A lower rudder plate 5 is connected at its upper end and is connected to the rudder material 2 and an upper plate 6 facing the upper plate 6 and the starboard side rudder plate 4 and the port side rudder plate 5 are connected at its lower end. And a plate 7. In the rudder plate 3, as shown in FIG. 3A, a vertical rudder bone 8 that is substantially parallel to the vertical direction D and a horizontal rudder bone 9 that intersects the vertical rudder bone 8 substantially perpendicularly are arranged. . Inside the rudder plate 3, a plurality of vertical rudder bones 8 and horizontal rudder bones 9 are provided in a lattice shape, and spaces where water can enter are formed in other portions.
Hereinafter, the starboard side steering plate 4 will be described. Since the starboard side steering plate 5 has the same configuration as the starboard side steering plate 4, the starboard side steering plate 4 will be described below as an example.

As shown in FIG. 2, the starboard side rudder plate 4 has a substantially rectangular shape when viewed from the side, and is formed by combining a plurality of plate materials. Specifically, a first plate member 41, a second plate member 42, and a third plate member 43 are arranged in order from the front side U.
The first plate member 41, the second plate member 42, and the third plate member 43 are made of plate-like metal members, and in the present embodiment, the dimensions in the vertical direction D are equal and the dimensions in the horizontal direction H are equal. Yes.
As shown in FIG. 2, the first plate member 41 includes a front end portion 413 on the front side U and a rear end portion 414 on the rear side L. Similarly, the second plate member 42 includes a front end portion 423 and a front end portion 423. The rear end portion 424 and the third plate member 43 include a front end portion 433 and a rear end portion 434. The front end portion 413 of the first plate member 41 is joined to the front end of the port side rudder plate 5 by appropriate means, and the rear end portion 434 of the third plate member 43 is connected to the rear end of the port side rudder plate 5 and appropriate means. Are joined together. Further, the rear end 414 of the first plate 41 is joined to the front end 423 of the second plate 42, and the rear end 424 of the second plate 42 is joined to the front end 433 of the third plate 43. . This joining will be described later.

  A part of the front side U is curved toward the port side rudder plate 5 side, and the first plate member 41 is joined to a plate material including the front end of the port side rudder plate 5. As shown in FIG. 3A, a bolt hole 412 for allowing the bolt B1 to pass therethrough is formed in the rear end 414, which is the end on the rear side L of the first plate member 41. The diameter of the bolt hole 412 is formed larger than the diameter of the bolt B1 described later, and allows relative displacement of the first plate 41 with respect to the bolt B1. Here, a plurality of bolt holes 412 are formed intermittently at a predetermined interval I along the vertical direction D.

  The first plate member 41 has a rear end portion 414 overlapped with a front end portion 423 of the second plate member 42 disposed outside the first plate member 41, so that the first plate member 41 is interposed between the first plate member 41 and the second plate member 42. The first connection band C1 is formed. As shown in FIG. 1, the first connection band C <b> 1 extends in the vertical direction D.

  As shown in FIG. 2, the first plate 41 has a bolt B <b> 1 penetrating through each of the plurality of bolt holes 412 in the rear end portion 414, and a second plate 42 described later, as shown in FIG. The threaded portion of the bolt B <b> 1 is fitted and fixed in a fitting hole 81 provided in the vertical rudder bone 8 in a state of being overlaid. Thereby, the 1st board | plate material 41 and the 2nd board | plate material 42 are joined by the joining area | region J arrange | positioned at predetermined intervals in the perpendicular direction D along the 1st connection band C1.

The plurality of bolts B1 are provided at equal intervals I in the vertical direction D, as shown in FIG. The narrower the interval between the joining regions J by the bolts B1 adjacent to each other, the higher the joining strength between the first plate member 41 and the second plate member 42. That is, in the first connection band C1, the region occupied by the bonding region J increases, and conversely, the region occupied by the non-bonding region N that is a non-bonded portion between the adjacent bonding regions J decreases. On the other hand, the wider the interval, the more difficult it is to fix the first plate 41 and the second plate 42.
Specifically, the interval I between the adjacent bolts B <b> 1 is set according to the specifications of the rudder 1.

  As shown in FIG. 3, the second plate member 42 is formed with a bolt hole 421 for allowing the bolt B <b> 1 to pass through the front end portion 423. The diameter of the bolt hole 421 is such that the diameter of the portion into which the cylindrical portion of the bolt B1, which will be described later, is inserted is larger than the diameter of the cylindrical portion of the bolt B1, and the relative displacement of the second plate member 42 with respect to the bolt B1 is allowed. doing. The plurality of bolt holes 412 are formed intermittently at predetermined intervals along the vertical direction D. The bolt hole 421 is formed so as to be aligned with the bolt hole 412 when the second plate member 42 and the first plate member 41 are overlapped so as to form the first connection band C1. The bolt hole 421 is formed such that when the bolt B1 is inserted to a predetermined position, the head is accommodated in the second plate member 42 and does not protrude from the surface of the second plate member 42. The bolt B1 can be a hexagon socket bolt. The same applies to bolts B2 and B3 described later.

  The rear end portion 424 of the second plate member 42 has the same structure as the rear end portion 414 of the first plate member 41. Specifically, a bolt hole 422 similar to the bolt hole 412 for allowing the bolt B2 to pass therethrough is formed.

  As shown in FIG. 2, the second plate member 42 has the rear end portion 424 overlapped with the front end portion 433 of the third plate member 43 disposed outside the second plate member 42. A second connection band C <b> 2 is formed between the third plate members 43.

The third plate member 43 has a structure in which the front end portion 433 is similar to the front end portion 423 of the second plate member 42.
Specifically, a bolt hole 431 similar to the bolt hole 421 shown in FIG. 3 is formed to allow the bolt B2 to pass through the front end portion 433. The bolt hole 431 is formed such that when the bolt B <b> 2 is inserted to a predetermined position, the head is housed inside the third plate member 43 and does not protrude from the surface of the third plate member 43.

  As shown in FIG. 2, the rear end 434 of the third plate member 43 is joined to the rear end of the port side rudder plate 5 by an appropriate means.

  In the state where the rear end portion 424 of the second plate member 42 and the front end portion 433 of the third plate member 43 are overlapped, the plurality of bolts B2 penetrates and is the same as in the case of the first plate member 41 and the second plate member 42 described above. Further, the screw portion of the bolt B <b> 2 is fitted into the fitting hole 81 and fixed to the vertical rudder bone 8. Thereby, the some joining area | region J is formed in the 2nd connection belt | band | zone C2, and the 2nd board | plate material 42 and the 3rd board | plate material 43 are joined intermittently. Further, a non-joining region N is formed between the joining regions J adjacent to each other.

As described above, the rudder 1 has the first connection band C1 in a state where the rear end 414 of the first plate 41 and the front end 423 of the second plate 42 are overlapped with each other. A plurality of joining regions J and non-joining regions N are intermittently formed by fastening with a plurality of bolts B1.
Similarly, the second connection band C2 is formed in the portion where the second plate member 42 and the third plate member 43 are overlapped, and a plurality of joining regions J and non-joining regions N are intermittently formed by fastening with a plurality of bolts B1. ing.
The first plate 41, the second plate 42 and the third plate 43 vibrate in the vertical direction D and the horizontal direction H when receiving the wake R from the screw propeller 93.
The port side rudder plate 5 is also formed in the same manner as the starboard side rudder plate 4.

Hereinafter, the effect which this embodiment has is explained.
As shown in FIG. 2, when the rudder 1 receives the wake R of the screw propeller 93, a separation vortex S that peels from the rear edge of the rudder 1 is generated. Due to the separation vortex S, vibration is excited in the starboard side rudder plate 4 and the port side rudder plate 5.
However, in the rudder 1 of the present embodiment, the first plate member 41, the second plate member 42, and the third plate member 43 are surfaces because the non-joined region N is not mechanically restrained by the vibration generated in the starboard side rudder plate 4. It can be displaced inward by a minute amount. More specifically, relative displacement h in the horizontal direction H between the first plate member 41 and the second plate member 42, as shown in FIG. Will occur. Further, as shown in FIG. 3C, a relative displacement d is also generated in the vertical direction D between the first plate member 41 and the second plate member 42.
Since the first plate member 41 and the second plate member 42 are in contact with each other in the non-bonded region N, the displacement h and the displacement d cause friction between the first plate member 41 and the second plate member 42, and the separation vortex. Since vibration energy due to S is consumed by being converted to friction energy, vibration of the rudder 1 can be attenuated. The vibration can be attenuated by friction due to relative displacement generated between the second plate member 42 and the third plate member 43 also in the second connection band C2.

  As described above, according to the present embodiment, members (first plate member 41, second plate member 42, and third plate member 43) necessary for configuring the starboard side steering plate 4 are connected to the connection band (first connection band). The vibration generated by the separation vortex S can be suppressed only by adopting the configuration of intermittent joining at C1, the second connection band C2). That is, according to this embodiment, for example, vibration can be suppressed without using a special member such as adding a weight to the rudder 1 in order to attenuate the vibration, so that the weight balance of the ship 90 is lost. There is no.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG.
In addition, in 2nd embodiment, the same code | symbol as 1st embodiment is attached | subjected to the component similar to 1st embodiment, and description is abbreviate | omitted.

  In the starboard side rudder plate 4 of the present embodiment, the first plate member 41 and the second plate member 42, and the second plate member 42 and the third plate member 43 are connected by spot welding (spot welding) instead of fastening with bolts. . The spot welding can be appropriately selected from various known methods as long as the energy for welding can be narrowed down so that the non-joining region N is formed. The welded portion W formed by spot welding has a strength necessary for fixing the first plate member 41 and the second plate member 42.

  In this embodiment, the non-joining area | region N is formed between adjacent welding parts W because the welding part W is arrange | positioned intermittently. In the present embodiment, a plurality of welds W and non-joining regions N are formed intermittently. The port side rudder plate 5 is also formed in the same manner as the starboard side rudder plate 4.

  In the first embodiment, the first plate member 41, the second plate member 42, and the third plate member 43 have a joint between the first plate member 41 and the second plate member 42, and a joint between the second plate member 42 and the third plate member 43. However, in the present embodiment, the joints are arranged so as to face the rear side L.

According to the present embodiment, it is not necessary to prepare the bolt B1 and the bolt B2, and the bolt holes (412, 421, 422, 431) are formed in the first plate member 41, the second plate member 42, and the third plate member 43. Since the forming process and the process of forming the fitting hole 81 into which the screw portion of the bolt B1 or the bolt B2 is fitted to the vertical rudder bone 8 are not required, the number of parts and the number of processing steps can be reduced.
[Third embodiment]

Next, a third embodiment of the present invention will be described with reference to FIG.
In addition, in 2nd embodiment, the same code | symbol as 1st embodiment is attached | subjected to the component similar to 1st embodiment, and description is abbreviate | omitted.

  Unlike the first embodiment, the plate material constituting the starboard side rudder plate 4 of this embodiment is a state in which a plurality of plate materials having the same dimension in the horizontal direction H are arranged in the vertical direction D, and each vertical direction D The vicinity of the end of each is joined by a bolt B3. That is, by attaching the plate material to the horizontal rudder bone 9 arranged in parallel with the upper plate 6 (see FIGS. 2 and 3A), the third connection band C3 is provided extending in the horizontal direction H. ing. The joining region J and the non-joining region N formed in the third connection band C3 are also arranged in the substantially horizontal direction H.

  According to the present embodiment, depending on the shape of the rudder 1, the connection band becomes longer than in the first embodiment, and therefore the non-joining region N can be lengthened. Therefore, there may be a case where the effect of suppressing vibration caused by the separation vortex S shown in FIG. 2 can be further obtained.

  In addition to the above, without departing from the gist of the present invention, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

Any one of the first plate member 41, the second plate member 42, and the third plate member 43, or a member capable of suppressing vibration, for example, a damping member, may be appropriately selected from among these two members. Can be pasted. Thereby, a vibration can be suppressed more.
Further, the port side rudder plate 5 can also be affixed with a damping material in the same manner as 4, and the vibration damping material can also be affixed to one or both of the starboard side rudder plate 4 and the port side rudder plate 5.

  As in the first embodiment, the first plate 41, the second plate 42, and the third plate 43 have a joint between the first plate 41 and the second plate 42 and a joint between the second plate 42 and the third plate 43. The first plate member 41 and the second plate member 42, and the second plate member 42 and the third plate member 43 are connected rearward as in the second embodiment. It may be arranged to face the side L. When the seam is arranged so as to face the rear side L, the resistance that the rudder 1 receives from the wake R can be reduced.

Moreover, although the starboard side rudder board 4 and the port side rudder board 5 were given the example formed in the same structure in three embodiment mentioned above, it is not limited to this, The starboard side rudder board 4 and port side rudder The number of plates of each plate 5 may be different.
Furthermore, only one of the starboard side rudder plate 4 and the port side rudder plate 5 may be formed of a plurality of plate members, and the other may be formed of a single plate member.

  Further, in the above-described three embodiments, an example in which the first connection band C1 extends in the vertical direction D or the third connection band C3 extends in the horizontal direction H has been described. If the desired vibration suppression effect is obtained, it is not limited to them. For example, the connection band may be arranged obliquely.

  In addition, although the connection band has been exemplified as extending linearly, it is not limited thereto as long as a desired vibration suppressing effect can be obtained. For example, it may be formed in an annular shape. As an example of the annular connection band, a part of the starboard side rudder plate 4 or the port side rudder plate 5 is cut out in a circular shape and covered with a disc-like plate material.

  The bolt B1 and the bolt B2 may be the same or different. Further, for example, the first plate member 41 and the second plate member 42 are fastened by the bolt B1, and the second plate member 42 and the third plate member 43 are connected by spot welding. Good.

  In the embodiment described above, in order to allow relative displacement of the first plate member 41, the second plate member 42, and the third plate member 43, an example in which the diameter of the bolt hole is formed larger than the bolt is shown. Due to the elasticity of the plate, the plate material may be displaced. Further, the plate material may be displaced by elastic deformation in the in-plane direction of the plate material.

  In the present embodiment, the example of the ship 90 in which the entire rudder plate 3 is immersed in water as a traveling body has been described. However, the present invention can be applied to a rudder plate in which a part thereof is submerged in water. . Further, the present invention can be applied not only to a traveling body traveling on water but also to a traveling body traveling under water.

1 rudder 2 rudder head member 3 rudder plate 4 starboard side rudder plate 41 first plate member 412 bolt hole 413 front end 414 rear end 42 second plate 421 bolt hole 422 bolt hole 423 front end 424 rear end 43 third Plate material 431 Bolt hole 433 Front end 434 Back end 5 Port side rudder plate 6 Upper plate 7 Lower plate 8 Vertical rudder bone 81 Fitting hole 9 Horizontal rudder bone 90 Ship 91 Hull 92 Stern 93 Screw propeller C1 First connection band C2 Second connecting band C3 Third connecting band J Joining area N Non-joining area W Welded part B1 Bolt B2 Bolt B3 Bolt I Spacing R Backflow S Separation vortex D Vertical direction H Horizontal direction U Front side L Rear side

Claims (4)

A first control surface constituting one of the front and back sides,
A second control surface constituting the other side of the front and back,
At least one of the first rudder surface and the second rudder surface is intermittently joined with a plurality of plate members, with a connection band formed by overlapping adjacent plate members,
A rudder board characterized by that. The connection band is
Extending along the vertical or horizontal direction,
The rudder plate according to claim 1. The intermittent connection is
Fastening at intervals or spot welding at intervals,
The steering plate according to claim 1 or claim 2. One or both of the first control surface and the second control surface are:
Damping material is pasted,
The rudder board as described in any one of Claims 1-3.

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