WO2013115487A1 - 가변피치프로펠러의 구동장치 및 피치각 제어방법, 이를 갖는 선박 - Google Patents
가변피치프로펠러의 구동장치 및 피치각 제어방법, 이를 갖는 선박 Download PDFInfo
- Publication number
- WO2013115487A1 WO2013115487A1 PCT/KR2012/011597 KR2012011597W WO2013115487A1 WO 2013115487 A1 WO2013115487 A1 WO 2013115487A1 KR 2012011597 W KR2012011597 W KR 2012011597W WO 2013115487 A1 WO2013115487 A1 WO 2013115487A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pitch
- propeller
- blade
- pitch angle
- 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.)
- Ceased
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H3/00—Propeller-blade pitch changing
- B63H3/002—Propeller-blade pitch changing with individually adjustable blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H3/00—Propeller-blade pitch changing
- B63H3/008—Propeller-blade pitch changing characterised by self-adjusting pitch, e.g. by means of springs, centrifugal forces, hydrodynamic forces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H3/00—Propeller-blade pitch changing
- B63H3/10—Propeller-blade pitch changing characterised by having pitch control conjoint with propulsion plant control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H3/00—Propeller-blade pitch changing
- B63H3/02—Propeller-blade pitch changing actuated by control element coaxial with propeller shaft, e.g. the control element being rotary
- B63H3/04—Propeller-blade pitch changing actuated by control element coaxial with propeller shaft, e.g. the control element being rotary the control element being reciprocatable
Definitions
- the present invention relates to a drive and a pitch angle control method of a variable pitch propeller in which the pitch of the blade is variable in response to the flow velocity flowing into the propeller side, and a ship having the same.
- a propulsion device In ships, a propulsion device is a device that generates propulsion force for navigation. Among such propulsion devices, there is a variable pitch propeller that can vary the pitch of a plurality of blades in consideration of the driving state of the ship.
- variable pitch propeller located at the stern side of the ship is uneven
- the pitch set on the basis of the average flow rate is equally applied to all the variable pitch propellers.
- the phenomenon is a major cause of hull vibration and rudder wear.
- the present embodiment provides a driving apparatus and a pitch angle control method of a variable pitch propeller capable of stably varying a pitch of a blade in response to a change in flow velocity flowing into the variable pitch propeller, and a ship having the same.
- the pitch adjusting device for adjusting the pitch angle
- the pitch adjusting device is connected to the eccentric protrusion connected to the lower end of the blade and the blade operating shaft is arranged to be linear reciprocating movement inside the propeller shaft to push or pull the eccentric projection, and the rotational movement of the propeller shaft of the blade operating shaft And a power converter converting the linear reciprocating motion.
- the power converter is provided with a guide pin extending from the blade operating shaft and protruding through a guide slot formed on the outer surface of the propeller shaft, and a pitch determination groove for sliding the guide pin around the outer periphery of the propeller shaft It includes a guide ring.
- the guide slot may be formed by cutting along the axial direction of the propeller shaft.
- the propeller shaft may be provided with a guide plate which is supported to be slidably penetrated through the blade operating shaft for the stable movement of the blade operating shaft.
- the guide plate may have a through hole through which the blade operating shaft penetrates, and the through hole may be provided in a tapered shape.
- the guide slot is formed extending along the axial direction of the propeller shaft, the guide pin may be moved back and forth in the guide slot as the slide along the pitch determination groove while being rotated with the propeller shaft.
- the pitch angle may be provided to vary in response to the flow rate flowing from the front of the blade.
- the propeller shaft is installed so as to extend through the stern boss of the hull, the pitch angle of the blade located at the top of the propeller shaft is characterized in that it is relatively smaller than the pitch angle located at the bottom of the propeller shaft.
- the pitch angle of the blade may be provided to gradually increase from the top end to the bottom end along the rotation angle of the propeller shaft.
- the blade is provided with a plurality of spaced apart along the circumference of the hub coupled to the end of the propeller shaft, the blade operation shaft is connected to the plurality of blades respectively are provided with a plurality to individually adjust the pitch angle of the plurality of blades
- the plurality of blade operating shafts may be provided with the guide pins moving along the pitch determination groove, respectively.
- the pitch determination groove may have a closed loop shape formed along the circumferential direction of the guide ring and may be disposed to be inclined at a predetermined angle with respect to the radial direction of the propeller shaft.
- the pitch determination groove has a first position defining a first pitch angle of the blade when the blade is located on the uppermost side of the propeller shaft, and a second pitch of the blade when located on the lowermost side of the propeller shaft. And a second position defining an angle, wherein the first pitch angle forms a minimum pitch angle, and the second pitch angle forms a maximum pitch angle.
- the blade operating shaft may include a first portion connected to the eccentric protrusion and a second portion supported by the guide plate, and the first portion and the second portion may be connected to each other through a rotary joint.
- the minimum inflow velocity is determined by determining the inflow velocity of the fluid flowing into the blade. Determine a first pitch angle of the blade and a second pitch angle of the blade at the point of maximum inflow velocity, the pitch angle of the blade being along the direction of rotation of the propeller shaft; It is characterized in that it is continuously controlled to gradually increase or decrease between pitch angles.
- the propulsion efficiency is improved because the pitch of the blade is variable in response to the flow velocity flowing into the variable pitch propeller.
- variable pitch propeller of the present embodiment can be stably controlled when the pitch is variable.
- Figure 1 schematically shows the hull aft installed variable pitch propeller of the embodiment of the present invention.
- Figure 2 shows a variable pitch propeller coupled to the pitch adjusting device of the embodiment of the present invention.
- Figure 3 is an exploded perspective view of the pitch adjusting device of the embodiment of the present invention.
- Figure 4 shows the propeller shaft inside the pitch adjusting device of the embodiment of the present invention is coupled.
- Figure 5 shows the pitch angle of the blade according to the inlet flow rate of the variable pitch propeller of the embodiment of the present invention.
- FIG 6 is an operational state diagram when the blade of the embodiment of the present invention is located at the top.
- FIG 7 is an operational state diagram when the blade of the embodiment of the present invention is located at the bottom.
- Figure 8 is an exploded perspective view showing a drive device of a variable pitch propeller according to another embodiment of the present invention.
- FIG. 9 is an operational state diagram of a variable pitch propeller according to another embodiment of the present invention.
- the propulsion device of the ship is installed at the end of the hollow propeller shaft 20 through the stern boss (11) of the hull 10 and the pitch of the blade 31 It includes a variable pitch propeller (30) for generating a driving force while being variable.
- the variable pitch propeller 30 includes a pitch adjusting device 40 that adjusts the pitch angle of the blade 31 continuously in response to the rotation angle when the propeller shaft 20 rotates.
- the pitch adjusting device 40 is provided to individually adjust the pitch angles of the plurality of blades 31 rotatably coupled about an axis on the outer surface of the hub 32 of the variable pitch propeller 30.
- the plurality of blades 31 each have a disk-shaped rotating plate 33 rotatably coupled to the outer surface of the hub 32, and eccentrically disposed to be deflected from the center of the rotating plate 33 below the rotating plate 33.
- the protrusion 35 is provided.
- Rotating plate 33 is rotatably installed in the circumferential direction while maintaining the watertight state on the hub 32, the eccentric protrusion 35 is pushed or pulled by the pitch adjusting device 40 to rotate the rotating plate 33 .
- Figure 2 shows a state in which the pitch adjusting device of the present embodiment is coupled
- Figure 3 is an exploded perspective view of the pitch adjusting device of the present embodiment
- Figure 4 shows a propeller shaft inside the pitch adjusting device of the present embodiment is coupled.
- the pitch adjusting device 40 is disposed in the propeller shaft 20 and the blade operating shaft 50 which is installed in a linear reciprocating movement along the axial direction of the propeller shaft 20 and , A power converter 60 for converting the rotational motion of the propeller shaft 20 into a linear reciprocating motion of the blade operating shaft 50.
- One end of the blade operating shaft 50 may be connected to the eccentric protrusion 35, and the other end thereof may be slidably supported by the guide plate 70 fixed inside the propeller shaft 20.
- the guide plate 70 is formed with a through hole 71 through which the blade operating shaft 50 penetrates, and an outer circumference of the guide plate 70 is supported by the inner circumferential surface of the propeller shaft 20 and is coupled with the propeller shaft 20. It will be rotated integrally.
- the through hole 71 may be provided in a tapered shape so as to have a predetermined clearance in the radial direction of the propeller shaft 20 when the blade operating shaft 50 slides. This is to absorb the radial positional change of the propeller shaft 20 when the blade operating shaft 50 linearly reciprocates along the axial direction.
- the power converter 60 is for converting the rotational motion of the propeller shaft 20 into the linear motion of the blade operating shaft 50, the guide pin extending radially outward from one side of the blade operating shaft 50 ( 62 and a guide ring 61 provided with a pitch determination groove 63 for guiding the sliding movement of the guide pin 62.
- the guide pin 62 may be arranged to protrude out of the propeller shaft 20 through the guide slot 64 cut along the axial direction from the outer surface of the propeller shaft 20 to contact the pitch determining groove 63. .
- the guide ring 61 may be provided to surround the outer circumference of the propeller shaft 20 from which the guide pin 62 protrudes, and may be fixed to the stern boss 11 side of the hull 10.
- the guide ring 61 is provided in the form of a hollow tube, and the pitch crystal groove 63 has an annular closed loop shape that is recessed along the inner circumferential surface of the guide ring 61.
- the pitch determination groove 63 may be disposed to have one or two inclination angles with respect to the yz plane orthogonal to the axial direction x of the propeller shaft 20. That is, the pitch determination groove 63 may be formed of an elliptic closed loop inclined at a predetermined angle with respect to the yz plane, or may be formed of a closed loop of a spiral groove.
- the pitch determination groove 63 determines the distance that the blade operating shaft 50 reciprocates along the axial direction x, and the eccentric protrusion connected to the blade operating shaft 50 while the blade operating shaft 50 moves. By pushing or pulling 35, the pitch angle of the blade 31 is controlled.
- the inflow flow rate of the fluid flowing into the variable pitch propeller 30 installed in the rear of the ship of the present embodiment is relatively faster than the upper half of the variable pitch propeller 30 due to the influence of the hull structure.
- the inflow velocity of the fluid is the slowest at the top 21 of the propeller shaft 20 and the fastest at the bottom 22.
- the inflow flow rate along the rotational direction of the propeller shaft 20 is divided into a portion 23 which gradually increases, and a portion 24 that gradually decreases.
- the pitch determination groove 63 defines the first pitch angle when the propeller 31 is positioned at the top 21 of the propeller shaft 20.
- a first position 63a and a second position 63b defining a second pitch angle when positioned at the lower end 22 of the propeller shaft 20, and along the direction of rotation of the propeller shaft 20.
- the blade operating shaft 50 is moved in a direction in which the pitch angle of the blade 31 gradually increases as the inflow flow rate gradually increases, that is, the portion 23, that is, the first position 63a to the second position 63b.
- the blade operating shaft in a direction in which the pitch angle of the blade 31 gradually decreases from the portion 24 where the inflow flow rate gradually decreases, that is, the second position 63b to the first position 63a. 50) to move.
- FIG. 6 is an operational state diagram when the blade of the present embodiment is located at the top end
- FIG. 7 is an operational state diagram when the blade of the present embodiment is located at the bottom end.
- the guide pin 62 protruding to the outside through the guide slot 64 is a pitch determination groove 63 formed in the inner circumferential surface of the guide ring 61 fixed to the stern boss 11 side. Sliding movement along) moves the blade operating shaft 50 back and forth along the axial direction (x), the blade operating shaft 50 to push or pull the eccentric protrusion 35 connected to the lower end of the blade 31 The pitch angle of the blade 31 is changed by this.
- the blade 31 When the guide pin 62 is in the first position 63a of the pitch determination groove 63 as shown in FIG. 6, the blade 31 is positioned at the top 21 of the propeller shaft 20. The blade 31 located at the top 21 has the smallest pitch angle. Subsequently, when the propeller shaft 20 rotates, the guide pin 62 gradually moves the blade operating shaft 50 backward while moving along the pitch determination groove 63, and the blade operating shaft 50 eccentric protrusion 35. ), The pitch angle of the blade 31 is gradually increased according to the rotational direction of the propeller shaft 20 as it is continuously drawn.
- the pitch angle of the blade 31 is continuously increased and decreased corresponding to the flow velocity of the fluid flowing into the blade 31 according to the rotation angle of the propeller shaft 20 at the same period as one rotation period of the propeller shaft 20. Done.
- the pitch angle of the blade when the pitch angle of the blade is continuously changed by hydraulic pressure, the pitch angle of the blade is constant because the lift force and resistance of the blade which appear due to the interaction of the fluid force and the torque of the blade are not steady.
- the present embodiment can continuously change the pitch angle of the blade by the mechanical configuration, it is possible to stably change the pitch angle of the blade corresponding to the rotation angle of the propeller shaft.
- a separate hydraulic control system for changing the pitch angle of the blade is not required, the structure of the propeller boss and the shaft system is simplified and the weight is reduced.
- FIG. 8 is an exploded perspective view illustrating a driving device of a variable pitch propeller according to another exemplary embodiment of the present invention
- FIG. 9 is an operating state diagram of FIG. 8.
- the drive device of the variable pitch propeller shown in FIG. 8 differs only in the structure of the blade operating shaft 80 connected to the eccentric protrusion 35 of the blade 31 and has the same components as the drive device of the variable pitch propeller described above.
- the blade operating shaft 80 is connected to the eccentric protrusion 35 so as to push or pull the eccentric protrusion 35, the first portion 81 having the guide pin 62 formed therein, and the through hole 73 of the guide plate 70.
- the first portion 81 and the second portion 82 may be rotatably coupled to each other through the rotary joint 90.
- the rotary joint 90 absorbs a change in the position of the radial y perpendicular to the axial direction x when the blade operating shaft 80 linearly reciprocates along the axial direction x.
- the rotary joint 90 of the present embodiment is formed to have a structure that is coupled to each other by a hinge pin 91, but this is only one example, the position change in the radial direction (y) according to the pitch change of the blade 31 If the structure is rotated to absorb the (ball type, etc.) may be applied in any form.
- the diameter of the through-hole 73 is kept constant so that the through-hole 73 in which the second portion 82 is inserted and slides to induce a stable linear movement instead of forming a tapered shape.
- the second portion 82 of the blade operating shaft 80 has a through hole 73. Stable linear movement in the state inserted into the blade, the first portion 81 of the blade operating shaft 80 is moved along the axial direction (x) and at the same time rotated by the rotary joint 90 blade 31 The degree of freedom of the radial (y) position change of the blade operation shaft 80 according to the pitch change of the to ensure.
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Description
Claims (15)
- 프로펠러축의 회전방향을 따라 피치각이 변경되는 블레이드와, 상기 피치각을 조절하는 피치조절장치를 갖는 가변피치프로펠러의 구동장치에 있어서,상기 피치조절장치는상기 블레이드의 하단부에 연결된 편심돌기와 연결되며 상기 편심돌기를 밀거나 당기도록 상기 프로펠러축의 내측에서 직선 왕복이동 가능하게 배치되는 블레이드 작동축과,상기 프로펠러축의 회전운동을 상기 블레이드 작동축의 직선 왕복운동으로 변환하는 동력 변환부를 포함하는 가변피치프로펠러의 구동장치.
- 제 1항에 있어서,상기 동력 변환부는상기 블레이드 작동축에서 연장되며 상기 프로펠러축의 외면에 형성된 가이드 슬롯을 통해 돌출되는 가이드 핀과,상기 프로펠러축의 외측 둘레를 감싸며 내면에 상기 가이드 핀이 슬라이딩 이동하는 피치 결정홈이 마련된 가이드 링을 포함하는 가변피치프로펠러의 구동장치.
- 제 2항에 있어서,상기 가이드 슬롯은 상기 프로펠러축의 축방향을 따라 절개되어 형성되는 가변피치프로펠러의 구동장치.
- 제 2항에 있어서,상기 프로펠러축 내에는 상기 블레이드 작동축의 안정적 이동을 위하여 상기 블레이드 작동축이 관통하여 슬라이딩 가능하게 지지되는 가이드 플레이트가 마련되는 가변피치프로펠러의 구동장치.
- 제 4항에 있어서,상기 가이드 플레이트는 내측에 상기 블레이드 작동축이 관통하는 관통홀을 구비하고, 상기 관통홀은 테이퍼 형태로 마련되는 가변피치프로펠러의 구동장치.
- 제 2항에 있어서,상기 가이드 슬롯은 상기 프로펠러축의 축방향을 따라 연장 형성되고,상기 가이드 핀은 상기 프로펠러축과 함께 회전되면서 상기 피치 결정홈을 따라 슬라이딩 이동함에 따라 상기 가이드 슬롯에서 전후로 이동되는 가변피치프로펠러의 구동장치.
- 제 2항에 있어서,상기 피치각은 상기 블레이드 전방에서 유입되는 유속에 대응하여 가변되도록 마련되는 가변피치프로펠러의 구동장치.
- 제 7항에 있어서,상기 프로펠러축은 선체의 스턴보스를 관통하여 연장되도록 설치되고,상기 프로펠러축의 최상단에 위치하는 상기 블레이드의 피치각은 상기 프로펠러축의 최하단에 위치하는 피치각 보다 상대적으로 작은 가변피치프로펠러의 구동장치.
- 제 8항에 있어서,상기 블레이드의 피치각은 상기 프로펠러축의 회전각도를 따라 상기 최상단에서 상기 최하단으로 갈수록 점진적으로 커지도록 마련되는 가변피치프로펠러의 구동장치.
- 제 2항에 있어서,상기 블레이드는 복수개 구비되어 상기 프로펠러축의 단부에 결합되는 허브의 둘레를 따라 이격 배치되고, 상기 블레이드 작동축은 상기 복수개의 블레이드에 각각 연결되어 상기 복수개의 블레이드의 피치각을 개별적으로 조절하도록 복수개 구비되고, 상기 복수개의 블레이드 작동축은 상기 피치 결정홈을 따라 이동하는 상기 가이드 핀이 각각 마련되는 가변피치프로펠러의 구동장치.
- 제 2항에 있어서,상기 피치 결정홈은 상기 가이드 링의 원주방향을 따라 함몰 형성된 폐루프 형태를 가지며 상기 프로펠러축의 반경방향에 대하여 소정각도로 경사지게 배치되는 가변피치프로펠러의 구동장치.
- 제 11항에 있어서,상기 피치 결정홈은상기 블레이드가 상기 프로펠러축의 최상측에 위치할 때 상기 블레이드의 제1피치각을 정의하는 제1위치와,상기 상기 프로펠러축의 최하측에 위치할 때 상기 블레이드의 제2피치각을 정의하는 제2위치를 구비하고,상기 제1피치각은 최소 피치각을 형성하고, 상기 제2피치각은 최대 피치각을 형성하는 가변피치프로펠러의 구동장치.
- 제 4항에 있어서,상기 블레이드 작동축은 상기 편심돌기와 연결되는 제1부분과 상기 가이드 플레이트에 지지되는 제2부분을 포함하고,상기 제1부분과 상기 제2부분은 회전 조인트를 통해 서로 연결되는 가변피치프로펠러의 구동장치.
- 제 1항 내지 제 13항 중 어느 한 항에 따른 가변피치프로펠러의 구동장치를 갖는 선박.
- 프로펠러축에 결합되어 추진력을 발생하는 가변피치프로펠러의 피치각 제어방법에 있어서,블레이드 쪽으로 유입되는 유체의 유입유속을 판단하여 최소 유입유속의 지점에서의 상기 블레이드의 제1피치각과 최대 유입유속의 지점에서의 상기 블레이드의 제2피치각을 결정하고,상기 블레이드의 피치각은 상기 프로펠러축의 회전방향을 따라 상기 제1피치각과 상기 제2피치각 사이에서 점진적으로 커지거나 작아지도록 제어되는 것을 특징으로 하는 가변피치프로펠러의 피치각 제어방법.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201280068586.4A CN104245501B (zh) | 2012-01-31 | 2012-12-27 | 可变螺距螺旋桨的驱动装置、螺距角控制方法以及包括该驱动装置的船舶 |
| US14/375,694 US9694886B2 (en) | 2012-01-31 | 2012-12-27 | Variable-pitch-propeller drive device and pitch-angle control method, and boat having same |
| EP12867702.8A EP2810868B1 (en) | 2012-01-31 | 2012-12-27 | Variable-pitch-propeller drive device and pitch-angle control method, and boat having same |
| JP2014555476A JP5836559B2 (ja) | 2012-01-31 | 2012-12-27 | 可変ピッチプロペラの駆動装置及びピッチ角制御方法、これを有する船舶 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2012-0009755 | 2012-01-31 | ||
| KR1020120009755A KR101358119B1 (ko) | 2012-01-31 | 2012-01-31 | 가변피치프로펠러의 구동장치 및 피치각 제어방법, 이를 갖는 선박 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2013115487A1 true WO2013115487A1 (ko) | 2013-08-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2012/011597 Ceased WO2013115487A1 (ko) | 2012-01-31 | 2012-12-27 | 가변피치프로펠러의 구동장치 및 피치각 제어방법, 이를 갖는 선박 |
Country Status (6)
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|---|---|
| US (1) | US9694886B2 (ko) |
| EP (1) | EP2810868B1 (ko) |
| JP (1) | JP5836559B2 (ko) |
| KR (1) | KR101358119B1 (ko) |
| CN (1) | CN104245501B (ko) |
| WO (1) | WO2013115487A1 (ko) |
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| US7758594B2 (en) | 2005-05-20 | 2010-07-20 | Neotract, Inc. | Devices, systems and methods for treating benign prostatic hyperplasia and other conditions |
| CN105035291A (zh) * | 2015-07-24 | 2015-11-11 | 苏州金业船用机械厂 | 一种轻质长寿命可调螺距螺旋桨 |
| CN105416546A (zh) * | 2015-11-25 | 2016-03-23 | 镇江同舟螺旋桨有限公司 | 一种可调距螺旋桨推进装置 |
| KR102320813B1 (ko) * | 2017-05-04 | 2021-11-02 | 삼성전자주식회사 | 무인비행체 |
| CN107310703B (zh) * | 2017-06-29 | 2018-10-09 | 大连碧蓝节能环保科技有限公司 | 一种变距船用螺旋桨 |
| WO2019126718A1 (en) | 2017-12-23 | 2019-06-27 | Neotract, Inc. | Expandable tissue engagement apparatus and method |
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| CN108327881A (zh) * | 2018-02-28 | 2018-07-27 | 冯华明 | 一种水利用环保多功能作业设备 |
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| CN109278964B (zh) * | 2018-09-19 | 2020-07-28 | 金立新 | 一种平变桨 |
| IT201800010465A1 (it) * | 2018-11-20 | 2020-05-20 | William Edoardo Scacchi | Elica per imbarcazioni a vela a passo variabile con ritorno in posizione di bandiera automatico senza ingranaggi |
| CN110155284B (zh) * | 2019-06-27 | 2021-08-17 | 重庆奥普提科技有限公司 | 一种海洋遥感检测装置 |
| JP2021037828A (ja) * | 2019-09-03 | 2021-03-11 | 三菱重工業株式会社 | 可変ピッチプロペラ |
| NL2028224B1 (en) * | 2021-05-17 | 2022-12-02 | Ship Motion Group B V | Pitch Control Unit for a Controllable Pitch Propeller |
| CN113636053B (zh) * | 2021-09-03 | 2025-04-29 | 中国矿业大学 | 一种同轴差速回转的凸轮正交齿轮式变距桨及控制方法 |
| CN114475115B (zh) * | 2021-12-30 | 2024-05-17 | 广州小鹏智慧充电科技有限公司 | 驱动系统和交通工具 |
| CN119370302B (zh) * | 2025-01-02 | 2025-03-25 | 天津水动力科技有限公司 | 一种尾装式水下推进器的自适应螺旋桨调节结构 |
| CN119659954B (zh) * | 2025-02-21 | 2025-06-20 | 中国科学院空天信息创新研究院 | 降落伞伞舱分离装置 |
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- 2012-12-27 WO PCT/KR2012/011597 patent/WO2013115487A1/ko not_active Ceased
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2015505525A (ja) | 2015-02-23 |
| EP2810868A1 (en) | 2014-12-10 |
| CN104245501B (zh) | 2017-03-08 |
| EP2810868B1 (en) | 2017-03-29 |
| CN104245501A (zh) | 2014-12-24 |
| US20150166157A1 (en) | 2015-06-18 |
| KR20130088491A (ko) | 2013-08-08 |
| EP2810868A4 (en) | 2015-12-16 |
| US9694886B2 (en) | 2017-07-04 |
| KR101358119B1 (ko) | 2014-02-07 |
| JP5836559B2 (ja) | 2015-12-24 |
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