CN105644749A - Ship propulsion mechanism - Google Patents
Ship propulsion mechanism Download PDFInfo
- Publication number
- CN105644749A CN105644749A CN201610008017.0A CN201610008017A CN105644749A CN 105644749 A CN105644749 A CN 105644749A CN 201610008017 A CN201610008017 A CN 201610008017A CN 105644749 A CN105644749 A CN 105644749A
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- CN
- China
- Prior art keywords
- propeller
- propeller hub
- hub cap
- fin keel
- rudder
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- 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.)
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Classifications
-
- 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
- B63H1/28—Other means for improving propeller efficiency
-
- 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
- B63H1/18—Propellers with means for diminishing cavitation, e.g. supercavitation
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Toys (AREA)
Abstract
The invention discloses a ship propulsion mechanism. The ship propulsion mechanism comprises a propeller and a rudder. A propeller hub is provided with a propeller hub cap. A rudder ball is arranged in the position, opposite to the propeller hub cap, of the rudder. Boosting wings are arranged on the two sides of the horizontal direction of the rudder ball correspondingly. The propeller hub cap comprises a propeller hub cap shell and fin keels. The fin keels are connected with a rotary shaft which is connected with a fin keel deflection mechanism. A fixing plate is arranged at the installation end of the propeller hub cap and provided with limiting grooves. The fin keel deflection mechanism comprises deflection rods. One ends of the deflection rods are connected with the rotary shaft, and the other ends of the deflection rods are each provided with an inertia ball adaptively arranged in the corresponding limiting groove. Reset springs are further arranged between the deflection rods and the propeller hub cap shell. Through the ship propulsion mechanism, the problems that in the prior art, a hub of a ship propulsion mechanism is poor in eddy elimination function, and the ship propulsion mechanism cannot adapt to the propeller speed of various propellers are effectively solved. Through the structure of the ship propulsion mechanism, hub eddies can be effectively reduced within a certain propeller speed range of the propeller, the propulsion efficiency of the propeller is improved, and very high practical value is achieved.
Description
Technical field
The present invention relates to shipbuilding technical field, especially relate to a kind of Ship Propeling mechanism that can improve propulsive efficiency.
Background technology
In prior art, boats and ships are usually driven by propeller, rely on the propeller being arranged on stern bottom to rotate the propulsive force produced and make boats and ships move. But when propeller rotates, strong hub eddy current can be produced after the propeller hub of propeller so that occur after hub that cavitation trend, hub eddy current can reduce the efficiency of propeller for vessels, and cause vibration and the noise at propeller place. In order to solve this problem, improving the propulsive efficiency of propeller, someone adopts turning oar to reduce this hub eddy current, also has people to increase fin on propeller hub cap to reduce hub eddy current, and dispersion also reduces the hub vortex cavitation concentrating on hub cap. Publication date is on March 25th, 2015, and publication number is that the patent document of CN104443333A discloses a kind of rudder ball co-axial contra rotating propeller, including main screw, rudder body, the rudder ball being arranged on rudder body and be arranged on the auxiliary propeller on rudder ball; Described rudder ball is oval revolving body, is arranged on the front of rudder body, and just to main screw Jiang Zhou center, the diameter of rudder ball is 0.8��1.5 times of main screw propeller hub small end face diameter; Described auxiliary propeller is positioned on rudder ball, and diameter is 0.2��0.5 times of main screw diameter, built-in small-sized integrated motor drive, oppositely oriented with main screw, and its number of sheets is identical with main screw or be the main screw number of sheets �� 1. This structure energy-saving effect is notable, has rudder ball concurrently and to the advantage turning oar, and boats and ships efficiency of promoting comprehensively can be made to improve 3%��8%. When boats and ships need steering manipulation to make rudder, the thrust that auxiliary propeller produces is conducive to ship turning, can reduce the boats and ships radius of gyration, improves maneuverability. But this structure needs to increase power set in rudder, and not only cost is high, and the structure of rudder is excessively complicated. Publication date is on June 11st, 2014, the patent document that publication number is CN103857589A discloses a kind of propeller hub cap with fin, fin including the periphery place of the propeller hub cap being positioned at boats and ships, with form end plate in the end of each fin, thus reducing hub vortex cavitation and reducing the cavitation phenomenon of rudder for ship. Additionally, fin can bring the propelling of the auxiliary except the propelling of propeller, thus further increase propulsive efficiency. But the fin keel on this patent hub cap is integrally fixed on hub cap, this fin keel in fixed form generally only has good hub eddy current elimination effect under a certain stabilized (steady-state) speed, when the rotating speed generation large change of propeller, the hub eddy current elimination effect of this fixed structure fin keel can significantly reduce, thus its effect reducing hub eddy current can not be played to greatest extent.
Summary of the invention
The present invention solves that its hub eddy current elimination effect of the Ship Propeling mechanism of prior art is poor, it is impossible to the problem adapting to multiple propeller oar speed, and a kind of Ship Propeling mechanism that all can effectively reduce hub eddy current within the scope of certain propeller oar speed is provided.
The present invention solves the problems referred to above and the concrete technical scheme adopted is, a kind of Ship Propeling mechanism, including propeller and rudder for ship, described propeller includes propeller hub and blade, propeller hub is provided with propeller hub cap, the position that described rudder for ship is relative with propeller hub cap is provided with rudder ball, the both sides of rudder ball horizontal direction are provided with the boosting wing, described propeller hub cap includes the propeller hub cap housing of enclosed construction and is arranged on the fin keel on described housing outer peripheral face, the installation end diameter of propeller hub cap housing and the equal diameters of propeller hub, described fin keel is connected to rotating shaft, fin keel is connected with the fin keel deflection mechanism being arranged in propeller hub cap housing by rotating shaft, the installation end of propeller hub cap is provided with fixing plate, fixing plate is provided with stopper slot, described fin keel deflection mechanism includes deflecting bar, one end of deflecting bar is connected with rotating shaft by drive mechanism, the other end of deflecting bar is provided with an inertia ball, described inertia ball fits in stopper slot slidably, it is additionally provided with back-moving spring between deflecting bar and propeller hub cap housing, during propeller rotational, inertia ball slides under the effect of inertia force in stopper slot, inertia ball passes through deflecting bar, drive mechanism drives axis of rotation, axis of rotation drives fin keel deflection.
The fin keel of propeller hub cap of the present invention is provided with rotating shaft, and rotating shaft connects deflection mechanism, when the rotating speed difference of propeller, deflection mechanism can provide different deflection angles, so that the helical angle of fin keel can be adjusted automatically according to the rotating speed of propeller, thus solving skeg on the propeller hub cap of prior art according to the adjustment of rotational speed deflection angle of propeller, thus affecting the problem of hub eddy current eradicating efficacy under different oar speed, the propulsive efficiency of propeller can not be improved; And plate also has the progradation of similar propeller, the propulsive efficiency of Ship Propeling mechanism therefore can be increased further. On the other hand, the present invention is provided with rudder ball in the position that rudder for ship is relative with propeller hub cap, and the both sides of rudder ball horizontal direction are provided with the boosting wing of the boosting wing, rudder ball and both sides can cut down eddy current, there is obvious thrust augmentation effect, thus improving the propulsive efficiency of Ship Propeling mechanism.
As preferably, the diameter of rudder ball is 1 to 2 times of propeller hub cap housing maximum gauge, the rear portion of rudder ball gradually tapers up formation pyramidal structure, the described boosting wing is two pieces, it is symmetricly set on the both sides of rudder ball, the height of the boosting wing is the 30% to 50% of rudder bulb diameter, and the length degree of the boosting wing is 1 to 2 times of rudder bulb diameter.
As preferably, drive mechanism is gear drive, and the link of deflecting bar and rotating shaft is provided with driving gear, and the wheel shaft of driving gear is arranged on propeller hub cap housing, rotating shaft is provided with the driven gear engaged with driving gear, and deflecting bar is connected with rotating shaft by driving gear, driven gear. Owing to the rotating shaft of fin keel is generally located on fin keel one end near fixing plate, and when propeller has higher rotating speed, in order to eliminate hub eddy current better, fin keel needs bigger helical angle, therefore two counter-rotational transmission principles of meshing gear of gear drive are adopted, the yawing moment conversion between deflecting bar and fin keel can be realized, when revolution speed of propeller increases, reach the purpose that fin keel helical angle increases. On the other hand, the gear ratio that gear drive can also pass through gear is adopted to regulate the relation between deflection angle and the fin keel deflection angle of deflecting bar, to realize best hub eddy current eradicating efficacy.
As preferably, driving gear is sector gear, and the side of sector gear is provided with the transverse axis vertical with wheel shaft, and deflecting bar is hinged on transverse axis.Deflecting bar and driving gear are hinged by transverse axis, can allow that deflecting bar displacement radially occurs at propeller hub cap, namely the stopper slot shape of inertia ball has more choice, so can design different inertia ball stopper slots on fixing plate according to different propeller operating modes, so that have different corresponding relations between fin keel helical angle and revolution speed of propeller, to realize best hub eddy current eradicating efficacy.
As preferably, stopper slot is straight trough, line form right angle triangle between the centrage of stopper slot and stopper slot two ends and fixing plate center of rotation or obtuse triangle. Its deflecting bar of the stopper slot of right angled triangle form is only at the rotation with in surface vertical with rotating shaft, and structure is relatively easy.
As preferably, stopper slot is straight trough, and the line between the centrage of stopper slot and stopper slot two ends and fixing plate center of rotation constitutes obtuse triangle. The stopper slot of obtuse triangle form its deflecting bar surfaces of revolution and axes of rotation skew, owing to the starting point of inertia ball is closer to the center of rotation of propeller hub and stopper slot close to being radially arranged, compared with aforementioned stopper slot, the variable quantity of the fin keel helical angle that the rotation speed change of propeller causes is relatively small, is more suitable under the operating mode that oar speed changes greatly and uses.
As preferably, the quantity of fin keel is identical with the blade quantity of propeller, and fin keel is positioned at the centre position of adjacent two propeller blade base portions near one end of propeller.
As preferably, the Breadth Maximum of fin keel is the 20% to 30% of propeller hub cap housing maximum gauge, and the greatest length of fin keel is the 60% to 80% of propeller hub cap axial length, and fin keel outer is provided with the edge strip that cross section is circle, and the diameter of edge strip is 2 to 4 times of fin keel thickness. The arranging of edge strip can make before and after fin keel the pressure differential between two sides increase, be conducive to improving propulsive efficiency, here the Breadth Maximum of fin keel refers to that single fin keel exceeds the maximum of propeller hub cap housing radial component, and the axial length of propeller hub cap refers to the greatest length in the axial direction of propeller hub cap.
As preferably, during propeller rotational, the maximum rotating diameter of fin keel is the 20% to 30% of blade maximum rotating diameter.
As preferably, fixing plate is provided with propeller hub cap installing hole, is provided with sealing gasket, is provided with sealing ring between propeller hub cap housing and rotating shaft between propeller hub cap and propeller hub. Seal structure to be used for preventing water inlet in propeller hub cap, thus affecting the slip of inertia ball.
The invention has the beneficial effects as follows, its hub eddy current elimination effect of Ship Propeling mechanism that it efficiently solves prior art is poor, the problem not adapting to multiple propeller oar speed, the Ship Propeling mechanism of the present invention all can effectively reduce hub eddy current within the scope of certain propeller oar speed, improve the propulsive efficiency of propeller, there is significantly high practical value.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of Ship Propeling mechanism of the present invention;
Fig. 2 is a kind of structural representation of propeller;
Fig. 3 is a kind of structural representation of propeller hub cap of the present invention;
Fig. 4 is a kind of partial structurtes schematic diagram of rudder plate of the present invention;
Fig. 5 is a kind of partial structurtes sectional view of propeller hub cap of the present invention;
Fig. 6 is a kind of partial structurtes sectional view of propeller hub cap of the present invention;
Fig. 7 is a kind of cross section view of propeller hub cap of the present invention;
Fig. 8 is the another kind of cross section view of propeller hub cap of the present invention;
Fig. 9 is a kind of cross-sectional structure schematic diagram of fin keel of the present invention.
In figure: 1. propeller hub cap housing, 2. fin keel, 3. rotating shaft, 4. fixing plate, 5. stopper slot, 6. deflecting bar, 7. inertia ball, 8. back-moving spring, 9. driving gear, 10. wheel shaft, 11. driven gears, 12. transverse axis, 13. edge strip, 14. propeller hub cap installing holes, 15. sealing gaskets, 16. sealing ring, 17. blades, 18. propeller hubs, 19. rudder for ship, 20. rudder balls, the 21. boosting wings.
Detailed description of the invention
By the examples below and in conjunction with accompanying drawing technical scheme is described in further detail.
Embodiment 1
At such as Fig. 1, Fig. 2, in embodiment 1 shown in Fig. 3, 1. a Ship Propeling mechanism, including propeller and rudder for ship, described propeller includes propeller hub 18 and 4 blades 17, propeller hub is provided with propeller hub cap, the installation end diameter of propeller hub cap housing and the equal diameters of propeller hub, the position that described rudder for ship 19 is relative with propeller hub cap is provided with rudder ball 20, the diameter of rudder ball is 1.2 times of propeller hub cap housing maximum gauge, the rear portion of rudder ball gradually tapers up formation pyramidal structure, the both sides of rudder ball horizontal direction are provided with two pieces of boosting wings 21, it is symmetricly set on the both sides of rudder ball, the height of the boosting wing is the 40% of rudder bulb diameter, the length degree of the boosting wing is 1.2 times of (see figure 4)s of rudder bulb diameter.
Described propeller hub cap includes the propeller hub cap housing 1 of enclosed construction and is arranged on the fin keel 2 on described housing outer peripheral face, the quantity of fin keel is identical with the blade quantity of propeller, fin keel is positioned at the centre position of adjacent two blade base portions near one end of propeller, the Breadth Maximum of fin keel is the 24% of propeller hub cap housing maximum gauge, the greatest length of fin keel is the 70% of propeller hub cap axial length, and during propeller rotational, the maximum rotating diameter of fin keel is the 24% of blade maximum rotating diameter.
Described fin keel is connected to rotating shaft 3, fin keel is connected with the fin keel deflection mechanism being arranged in propeller hub cap housing by rotating shaft, the installation end of propeller hub cap is provided with fixing plate 4, fixing plate is provided with stopper slot 5, stopper slot is straight trough, line form right angle triangle (see figure 7) between the centrage of stopper slot and stopper slot two ends and fixing plate center of rotation, fixing plate is additionally provided with propeller hub cap installing hole 14, is provided with sealing gasket 15 between propeller hub cap and propeller hub, between propeller hub cap housing and rotating shaft, is provided with sealing ring 16. Described fin keel deflection mechanism includes deflecting bar 6, one end of deflecting bar is connected with rotating shaft by drive mechanism, the other end of deflecting bar is provided with an inertia ball 7(and sees Fig. 5), described inertia ball fits in stopper slot slidably, being additionally provided with back-moving spring 8 between deflecting bar and propeller hub cap housing, during propeller rotational, inertia ball slides under the effect of inertia force in stopper slot, inertia ball drives axis of rotation by deflecting bar, drive mechanism, and axis of rotation drives fin keel deflection. Drive mechanism is gear drive, the link of deflecting bar and rotating shaft is provided with driving gear 9, driving gear is sector gear (see figure 6), the side of sector gear is provided with the transverse axis 12 vertical with wheel shaft, deflecting bar is hinged on transverse axis, the wheel shaft 10 of driving gear is arranged on propeller hub cap housing, and rotating shaft is provided with the driven gear 11 engaged with driving gear, and deflecting bar is connected with rotating shaft by driving gear, driven gear.
Embodiment 2
The stopper slot of embodiment 2 is 5 straight troughs, line between the centrage of stopper slot and stopper slot two ends and fixing plate center of rotation constitutes obtuse triangle (see figure 8), fin keel outer is provided with the edge strip 13(that cross section is circular and sees Fig. 9), the diameter of edge strip is 3 times of fin keel thickness, and all the other are identical with embodiment 1.
The fin keel of propeller hub cap of the present invention is provided with rotating shaft, and rotating shaft connects deflection mechanism, when the rotating speed difference of propeller, deflection mechanism can provide different deflection angles, so that the helical angle of fin keel can be adjusted automatically according to the rotating speed of propeller, thus solving skeg on the propeller hub cap of prior art according to the adjustment of rotational speed deflection angle of propeller, thus affecting the problem of hub eddy current eradicating efficacy under different oar speed, the propulsive efficiency of propeller can not be improved;And plate also has the progradation of similar propeller, the propulsive efficiency of Ship Propeling mechanism therefore can be increased further. On the other hand, the present invention is provided with rudder ball in the position that rudder for ship is relative with propeller hub cap, and the both sides of rudder ball horizontal direction are provided with the boosting wing of the boosting wing, rudder ball and both sides can cut down eddy current, there is obvious thrust augmentation effect, thus improving the propulsive efficiency of Ship Propeling mechanism.
In addition to the implementation; in the scope disclosed in claims of the present invention and description; the technical characteristic of the present invention or technical data can carry out reselecting and combining; thus constituting new embodiment; the embodiment that these present invention are not described in is that those skilled in the art just can realize easily without creative work, and therefore these embodiments not being described in detail also should be regarded as specific embodiments of the invention and within protection scope of the present invention.
Claims (10)
1. a Ship Propeling mechanism, including propeller and rudder for ship, it is characterized in that, described propeller includes propeller hub (18) and blade (17), propeller hub is provided with propeller hub cap, the position that described rudder for ship (19) is relative with propeller hub cap is provided with rudder ball (20), the both sides of rudder ball horizontal direction are provided with the boosting wing (21), propeller hub cap housing (1) that described propeller hub cap includes enclosed construction and the fin keel (2) being arranged on described housing outer peripheral face, the installation end diameter of propeller hub cap housing and the equal diameters of propeller hub, described fin keel is connected to rotating shaft (3), fin keel is connected with the fin keel deflection mechanism being arranged in propeller hub cap housing by rotating shaft, the installation end of propeller hub cap is provided with fixing plate (4), fixing plate is provided with stopper slot (5), described fin keel deflection mechanism includes deflecting bar (6), one end of deflecting bar is connected with rotating shaft by drive mechanism, the other end of deflecting bar is provided with an inertia ball (7), described inertia ball fits in stopper slot slidably, back-moving spring (8) it is additionally provided with between deflecting bar and propeller hub cap housing, during propeller rotational, inertia ball slides under the effect of inertia force in stopper slot, inertia ball passes through deflecting bar, drive mechanism drives axis of rotation, axis of rotation drives fin keel deflection.
2. Ship Propeling mechanism according to claim 1, it is characterized in that, the diameter of described rudder ball is 1 to 2 times of propeller hub cap housing maximum gauge, the rear portion of rudder ball gradually tapers up formation pyramidal structure, the described boosting wing is two pieces, being symmetricly set on the both sides of rudder ball, the height of the boosting wing is the 30% to 50% of rudder bulb diameter, and the length degree of the boosting wing is 1 to 2 times of rudder bulb diameter.
3. Ship Propeling mechanism according to claim 1, it is characterized in that, described drive mechanism is gear drive, the link of deflecting bar and rotating shaft is provided with driving gear (9), the wheel shaft (10) of driving gear is arranged on propeller hub cap housing, rotating shaft is provided with the driven gear (11) engaged with driving gear, and deflecting bar is connected with rotating shaft by driving gear, driven gear.
4. Ship Propeling mechanism according to claim 3, is characterized in that, described driving gear is sector gear, and the side of sector gear is provided with the transverse axis (12) vertical with wheel shaft, and deflecting bar is hinged on transverse axis.
5. Ship Propeling mechanism according to claim 1, is characterized in that, described stopper slot is straight trough, the line form right angle triangle between the centrage of stopper slot and stopper slot two ends and fixing plate center of rotation.
6. Ship Propeling mechanism according to claim 1, is characterized in that, described stopper slot is straight trough, and the line between the centrage of stopper slot and stopper slot two ends and fixing plate center of rotation constitutes obtuse triangle.
7. Ship Propeling mechanism according to claim 1, is characterized in that, the quantity of described fin keel is identical with the blade quantity of propeller, and fin keel is positioned at the centre position of adjacent two blade base portions near one end of propeller.
8. Ship Propeling mechanism according to claim 1, it is characterized in that, the Breadth Maximum of described fin keel is the 20% to 30% of propeller hub cap housing maximum gauge, the greatest length of fin keel is the 60% to 80% of propeller hub cap axial length, fin keel outer is provided with the edge strip (13) that cross section is circle, and the diameter of edge strip is 2 to 4 times of fin keel thickness.
9. the Ship Propeling mechanism according to any one of claim 1-8, is characterized in that, during propeller rotational, the maximum rotating diameter of fin keel is the 20% to 30% of blade maximum rotating diameter.
10. the Ship Propeling mechanism according to any one of claim 1-8, is characterized in that, fixing plate is provided with propeller hub cap installing hole (14), is provided with sealing gasket (15), is provided with sealing ring (16) between propeller hub cap housing and rotating shaft between propeller hub cap and propeller hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008017.0A CN105644749A (en) | 2016-01-06 | 2016-01-06 | Ship propulsion mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008017.0A CN105644749A (en) | 2016-01-06 | 2016-01-06 | Ship propulsion mechanism |
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| CN105644749A true CN105644749A (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610008017.0A Pending CN105644749A (en) | 2016-01-06 | 2016-01-06 | Ship propulsion mechanism |
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|---|---|---|---|---|
| CN108149660A (en) * | 2018-01-17 | 2018-06-12 | 张连鹏 | A kind of Multifunctional marine drilling platforms |
| CN108163728A (en) * | 2018-01-17 | 2018-06-15 | 李玲 | A kind of ocean engineering self-powered crane ship |
| JP2020006797A (en) * | 2018-07-09 | 2020-01-16 | 商船三井テクノトレード株式会社 | Rudder system |
| CN111361732A (en) * | 2020-05-07 | 2020-07-03 | 天峋创新（北京）科技有限公司 | Main rotor hub overall design of unmanned helicopter |
| CN113716004A (en) * | 2021-09-10 | 2021-11-30 | 哈尔滨工程大学 | Novel bionic propeller |
| CN115009488A (en) * | 2022-07-15 | 2022-09-06 | 上海外高桥造船有限公司 | Energy-saving device behind oar |
| CN115052810A (en) * | 2020-01-30 | 2022-09-13 | 现代重工业株式会社 | Steering device and ship with same |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108149660A (en) * | 2018-01-17 | 2018-06-12 | 张连鹏 | A kind of Multifunctional marine drilling platforms |
| CN108163728A (en) * | 2018-01-17 | 2018-06-15 | 李玲 | A kind of ocean engineering self-powered crane ship |
| JP2020006797A (en) * | 2018-07-09 | 2020-01-16 | 商船三井テクノトレード株式会社 | Rudder system |
| JP7178188B2 (en) | 2018-07-09 | 2022-11-25 | 商船三井テクノトレード株式会社 | rudder system |
| CN115052810A (en) * | 2020-01-30 | 2022-09-13 | 现代重工业株式会社 | Steering device and ship with same |
| CN115052810B (en) * | 2020-01-30 | 2024-06-07 | 现代重工业株式会社 | Steering device and ship with same |
| CN111361732A (en) * | 2020-05-07 | 2020-07-03 | 天峋创新（北京）科技有限公司 | Main rotor hub overall design of unmanned helicopter |
| CN113716004A (en) * | 2021-09-10 | 2021-11-30 | 哈尔滨工程大学 | Novel bionic propeller |
| CN115009488A (en) * | 2022-07-15 | 2022-09-06 | 上海外高桥造船有限公司 | Energy-saving device behind oar |
| CN115009488B (en) * | 2022-07-15 | 2023-12-22 | 上海外高桥造船有限公司 | Energy-saving device behind oar |
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