JP2016032952A5 - - Google Patents

Claims (18)

  A three-wing rudder installed behind a propeller attached to a stern portion of a hull, a central wing driven by a driving means via a rudder shaft, and two sub-wings disposed on the left and right of the central wing; And a rudder connection structure for connecting the central wing and the two sub wings, respectively, an area ratio of the sub wing on one side to the central wing is 0.25 or more, and the central wing and the two wings A three-wing rudder characterized in that a front-rear area ratio of a front area and a rear area of the rudder shaft in total with a sub wing is in a range of 20:80 to 40:60.   The three-wing rudder according to claim 1, wherein the auxiliary wings are arranged in front of and behind the rudder shaft.   The three-wing rudder according to claim 2, wherein a dimension of the auxiliary wing in front of the rudder shaft is set smaller than a dimension of the rear.   4. The three-wing rudder according to claim 1, wherein a rear edge of the sub wing is disposed in front of a rear edge of the central wing. 5.   The front edge of the sub wing is retracted from the front edge of the central wing so that the front edge of the sub wing does not contact the propeller even when the rudder shaft rotates by 35 degrees. The three-wing rudder according to one of claims 1 to 4.   6. The three-wing rudder according to claim 1, wherein the lower end of the sub wing is arranged at substantially the same level as the lower end of the central wing.   The ratio of the vertical dimension to the lateral dimension (aspect ratio) of the sub wing or the central wing in a side view state is set to 3 or more and 9 or less, according to one of claims 1 to 6. The three-wing rudder described.   The three-wing rudder according to any one of claims 1 to 7, wherein a shape of the sub wing is formed in a bee shape in which a lower portion is widened.   The three-wing rudder according to any one of claims 1 to 8, wherein a cross-sectional shape of the central wing in a plan view is formed in a symmetric wing shape.   The three-wing rudder according to any one of claims 1 to 9, wherein a cross-sectional shape of the sub wing in a plan view is formed in a symmetric wing shape.   10. The three-wing rudder according to claim 1, wherein a cross-sectional shape of the sub wing in a plan view is formed as a camber wing shape having a convex shape outward.   10. The three-wing rudder according to claim 1, wherein a cross-sectional shape of the sub wing in a plan view is formed as a camber wing shape having a convex shape on the inside.   13. The three-wing rudder according to claim 1, wherein a tail line connecting a leading edge and a trailing edge of the sub wing has an angle with respect to a center line of the central wing. .   14. The three-wing rudder according to claim 1, wherein the rudder connection structure is provided at an upper portion, a lower portion, and a center portion of the sub wing.   The cross-sectional shape of the rudder connection structure at the center is formed into a camber airfoil that is convex in the direction of the rotational flow of the propeller, or the tail line of the cross-section of the connection structure in a side view is a horizontal plane The three-wing rudder according to claim 14, wherein the three-wing rudder has an angle with respect to. The shape of the central wing is formed into a reaction rudder type , or one of claims 1 to 8 , or one of claims 10 to 15 not quoting claim 9. The three-wing rudder described.   The three-wing rudder according to any one of claims 1 to 16, wherein the auxiliary wing or the central wing has a rudder addition including a valve, a fin, or a duct. A ship with a three-wing rudder comprising the three-wing rudder according to claim 1 in a stern part .