EP3424811A1 - Rotor mit horizontaler achse und boot mit diesem rotor - Google Patents

Rotor mit horizontaler achse und boot mit diesem rotor Download PDF

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Publication number
EP3424811A1
EP3424811A1 EP17759765.5A EP17759765A EP3424811A1 EP 3424811 A1 EP3424811 A1 EP 3424811A1 EP 17759765 A EP17759765 A EP 17759765A EP 3424811 A1 EP3424811 A1 EP 3424811A1
Authority
EP
European Patent Office
Prior art keywords
blade
rotor
face
front face
horizontal shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP17759765.5A
Other languages
English (en)
French (fr)
Other versions
EP3424811A4 (de
Inventor
Masahiko Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN Corp
Original Assignee
Bellsion KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bellsion KK filed Critical Bellsion KK
Publication of EP3424811A1 publication Critical patent/EP3424811A1/de
Publication of EP3424811A4 publication Critical patent/EP3424811A4/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H7/00—Propulsion directly actuated on air
    • B63H7/02—Propulsion directly actuated on air using propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/26—Blades

Definitions

  • the present invention relates to a horizontal shaft rotor and a watercraft having the rotor, and more particularly, to a horizontal shaft rotor in which a flow receiving surface of a lift-type blade is largely bulged and a blade tip is inclined to the direction of the flow receiving surface and a watercraft having the rotor.
  • a blade in which the blade tip is inclined to the direction of the flow receiving surface is disclosed for example, in Patent Literature 1.
  • Patent Literature 1 JP2007-125914A
  • a horizontal shaft rotor comprising a lift-type blade, in the lift-type blade, a front face in a flow receiving direction is a large arcuate bulging face in a string direction, a rear face in a discharge direction is made smaller than the bulge of the front face, when the blade rotates, a high speed flow caused according to the Coanda effect passing along the string direction of the front face from a rear edge portion to a back face direction generates propulsive force.
  • a watercraft comprising the horizontal shaft rotor according to any one of claims 1 to 3, wherein the horizontal shaft rotor is mounted on a rotor shaft of a rotor housing disposed in the watercraft so that a tip of an inclined portion of a blade is oriented in a bow direction.
  • the fluid along the front face gathers in the direction of the inclined portion, and gets even faster according to the Coanda effect occurring at the bulging face of the front face in the inclined portion, and passes to the back face direction, the propulsive force in the rotor shaft direction is generated as a reaction.
  • the thickness gradually decreases from the blade root portion to the blade tip portion, and the front face gradually inclines toward the back face direction from the blade root portion to the blade tip portion, so that the resistance during rotation is small and the fluid along the front face is easy to move to the blade tip direction, the fluid gathered at the inclined portion of the blade tip becomes high speed according to the Coanda effect and flows from the rear edge to the back face direction, the propulsive force is generated as a reaction.
  • Fig. 1 is a front view of the upstream side (flow receiving side) of the horizontal shaft rotor (hereinafter simply referred to as a rotor) of the present invention
  • the front face 3D faces, for example, a stern of a ship, and becomes a flow receiving surface that receives an air current in an airplane.
  • a plurality (five in Fig. 1 ) of lift-type blades (hereinafter simply referred to as blades) 3, 3 are disposed on the peripheral surface of the hub 2.
  • the blade 3 gradually increases the string length from the blade root portion 3A to the blade tip portion, and the maximum string length portion 3B is set to be as wide as 45 to 50% of a turning radius.
  • a side shape of the blade 3 gradually decreases in thickness from the blade root portion 3A to the blade tip portion, and the front face 3D of the upstream side gradually inclines in the downstream direction (discharge side) from the blade root portion 3Ato the blade tip portion.
  • the tip from the maximum string length portion 3B is an inclined portion 3C, and as shown in Fig. 2 , it is inclined at an angle of 30 to 45 degrees to the upstream side (flow receiving side).
  • the maximum string length portion 3B of the back face 3E is set as a base point and the tip is inclined to an orthogonal direction (X arrow).
  • the back face 3E on the downstream side of the blade 3 is a flat face, as shown in Figs. 3 to 8 , in the blade root portion 3A, the angle of attack is zero with respect to the rotation direction, and gradually increases towards the blade tip portion.
  • a central portion of the string bulges out toward the upstream side (rotor shaft direction in the drawings).
  • the degree of this bulging may be, for example, about 15% of the string length in the vicinity of the tip, but the thickness may be increased up to 30% of the string length at the maximum.
  • the thickness with respect to the string length is about 66% on Fig. 4 , but it may be thicker than that.
  • the thickness gradually becomes thinner towards the blade tip portion.
  • the thickness is as thin as about 17% of the maximum string length, and is further thinner toward the inclined portion 3C.
  • the fluid passing to the string direction passes through the large bulged front face 3D at a high speed according to the Coanda effect.
  • the fluid passing through the front face 3D is faster than the velocity of the fluid passing through the back face 3E without bulge, and for the fluid that the flow velocity is faster than the surroundings, its density becomes lower density and the pressure drops lower than the ambient.
  • a fluid of normal pressure flows into the fluid of reduced pressure from the surroundings, as a result, the fluid pressure increases and the fluid moves to the direction of the blade tip portion, then, the fluid gathers at the inclined portion 3C and strikes it, as a result, the fluid passes through the bulged front face 3D in the inclined portion 3C to the direction of the rear edge portion 3G of the string, the propulsive force is generated as a reaction.
  • Fig. 7 fluid flowing along the front face 3D of the maximum string length portion 3B flows into the direction of the arrow B at a high speed.
  • the arrow B direction is opened in a direction away from an axial line S of the rotor 1, as compared with the arrow C direction in Fig. 6 . This has the action of rotating the blade 3 to the rotation direction as a reaction.
  • Fig. 8 shows a cross section of the inclined portion 3C.
  • the inclined portion 3C is inclined to the front direction (rotor shaft direction) of the front face 3D.
  • the front face 3D has a large bulge, due to the rotation, the fluid passing at high speed according to the Coanda effect from the rear edge portion 3G to the back face 3E direction along the string direction at the front face 3D of the inclined portion 3C passes to the direction of the arrow A, the propulsive force is generated as a reaction.
  • the amount of the fluid in a certain period of time gathered in the maximum string length portion 3B is a fluid which gathers from the direction of the blade root portion 3A by centrifugal force and other fluid pressure change due to the rotation, as a quite large reaction, that is, the rotational speed of the rotor 1 is increased, and a large propulsive force is generated to the direction of the rotor shaft 4.
  • the rotor 1 does not push out water to the downstream direction by the blade 3, due to the rotation of the blade 3, the relative flow generated in the string direction becomes the high speed water flow according to the Coanda effect at the front face 3D, and passes from the rear edge portion 3G to the back face 3E direction, the propulsive force is generated as a reaction.
  • the blade 3 does not push out water by force, so that large power is not required. Since Coanda effect naturally occurring due to the rotation of the blade 3 is utilized, when the blade 3 rotates, the Coanda effect naturally occurs, and when the flow velocity of the fluid along the front face 3D is faster than the fluid along the back surface 3E, the high speed flow naturally passes to the direction of the back face 3E.
  • Fig. 9 shows the rotor 1 of the present invention mounted on the propulsion machine of a watercraft 5 above water
  • Fig. 10 is a side view showing a partial cross section of a rotor housing 7.
  • the rotor housing 7 is horizontally mounted on the back deck of the watercraft 5 via a support 6.
  • a rotor shaft 10 connected to a motor 8 and a clutch 9 is supported in the rotor housing 7, and the rotor 1 is disposed at the tip of the rotor shaft 4.
  • the front end portion of the rotor shaft 4 is connected to the motor 8 via the clutch 9 so that the rotor 1 can be rotated by the motor 8, but when the clutch 9 is disconnected, the rotor 1 can be rotated by wind power.
  • Number of blades 3 is arbitrarily set within the range of 2 to 6 sheets.
  • a rotation number of the rotor shaft 4 is measured by a measuring instrument 10 provided in the rotor housing 7, and the measured value is inputted to an automatic controller 11.
  • the motor 8 is started and the clutch 9 is connected, the rotor 1 is rotated by the motor 8.
  • the rotor 1 When the rotational speed of the rotor 1 is increased, the propulsive force is further increased. As a result, by adding a small auxiliary motor, a strong propulsive force can be obtained.
  • the rotor 1 may be used as a screw under water.
EP17759765.5A 2016-03-01 2017-02-22 Rotor mit horizontaler achse und boot mit diesem rotor Withdrawn EP3424811A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016038817A JP2017154576A (ja) 2016-03-01 2016-03-01 横軸ロータ並びにそのロータを備えた舟艇
PCT/JP2017/006592 WO2017150299A1 (ja) 2016-03-01 2017-02-22 横軸ロータ並びにそのロータを備えた舟艇

Publications (2)

Publication Number Publication Date
EP3424811A1 true EP3424811A1 (de) 2019-01-09
EP3424811A4 EP3424811A4 (de) 2019-10-09

Family

ID=59742892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17759765.5A Withdrawn EP3424811A4 (de) 2016-03-01 2017-02-22 Rotor mit horizontaler achse und boot mit diesem rotor

Country Status (6)

Country Link
US (1) US20190009873A1 (de)
EP (1) EP3424811A4 (de)
JP (1) JP2017154576A (de)
KR (1) KR20180120709A (de)
CN (1) CN108698678A (de)
WO (1) WO2017150299A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7007841B2 (ja) * 2017-09-07 2022-01-25 Ntn株式会社 ロータブレードとこれを備える横軸水車
JP6426869B1 (ja) * 2018-06-08 2018-11-21 株式会社グローバルエナジー 横軸ロータ

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1838453A (en) * 1930-05-15 1931-12-29 Rosen William Propeller
US2464797A (en) * 1947-06-30 1949-03-22 Jessie A Davis Foundation Inc Air-pressure differential creating device
JPS5928958Y2 (ja) * 1979-02-21 1984-08-20 石川島播磨重工業株式会社 舶用プロペラ
JPS6018599B2 (ja) * 1980-07-10 1985-05-11 三井造船株式会社 舶用プロペラ
US5205765A (en) * 1990-11-27 1993-04-27 The Pinnacle Corporation Boat hull and propulsion system or the like
JPH0826186A (ja) * 1994-07-14 1996-01-30 Nippon Souda Syst Kk 翼端板付きプロペラ
GB0425303D0 (en) * 2004-11-17 2004-12-15 Overberg Ltd Floating apparatus for deploying in a marine current for gaining energy
JP4740580B2 (ja) * 2004-11-30 2011-08-03 株式会社ベルシオン 横軸風車のブレード並びに横軸風車
JP2006200400A (ja) * 2005-01-19 2006-08-03 Fuji Heavy Ind Ltd 水平軸風車
JP5161423B2 (ja) 2005-11-01 2013-03-13 株式会社ベルシオン 流体集束プロペラ
DK1953083T3 (da) * 2005-11-01 2014-01-06 Bellsion Kk Stille propel
KR20100039752A (ko) * 2008-10-08 2010-04-16 삼성중공업 주식회사 로터 블레이드 조립체
JP2010195153A (ja) * 2009-02-24 2010-09-09 Mitsubishi Heavy Ind Ltd 船舶用リアクションフィン装置および船舶
JP5925997B2 (ja) * 2011-04-18 2016-05-25 株式会社ベルシオン 流体機器用ロータのブレード

Also Published As

Publication number Publication date
JP2017154576A (ja) 2017-09-07
CN108698678A (zh) 2018-10-23
WO2017150299A1 (ja) 2017-09-08
KR20180120709A (ko) 2018-11-06
EP3424811A4 (de) 2019-10-09
US20190009873A1 (en) 2019-01-10

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