CN110027693A - A kind of sub- propeller rudder and its ship that ship's navigation efficiency can be improved - Google Patents
A kind of sub- propeller rudder and its ship that ship's navigation efficiency can be improved Download PDFInfo
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- CN110027693A CN110027693A CN201910314294.8A CN201910314294A CN110027693A CN 110027693 A CN110027693 A CN 110027693A CN 201910314294 A CN201910314294 A CN 201910314294A CN 110027693 A CN110027693 A CN 110027693A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000006978 adaptation Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 230000001788 irregular Effects 0.000 claims 1
- 230000001141 propulsive effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
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- 230000009286 beneficial effect Effects 0.000 description 2
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- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/06—Steering by rudders
- B63H25/38—Rudders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/42—Steering or dynamic anchoring by propulsive elements; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Toys (AREA)
- Gear Transmission (AREA)
Abstract
The present invention relates to the power performance of ship and its steerable systems, in particular to a kind of sub- propeller rudder and its ship that ship's navigation efficiency can be improved, the sub- propeller rudder includes being vertically arranged at stern and the rudderpost perpendicular with ship keel extension line, V-type bracket, the recycling roller formed including drum blade and roller bearing, gear case assembly, sub- propeller and safety guard, apply driving force to drum blade by the impact force that wake flow generates, drum blade is set to drive the gear rotation in gear case assembly, and then sub- propeller is promoted to rotate, it generates to the forward driving force of ship and steering force, reduce the wave making resistance of ship wake, eliminate the resistance that propeller flings rudder blade, the angle adjustment of rudderpost can play whole steering-effecting to the sub- propeller rudder simultaneously, make more stable using the ship's navigation of the sub- propeller rudder, steerage is higher It is stronger with propulsive force.
Description
Technical field
The present invention relates to the power performance of ship and its steerable system, in particular to a kind of ship's navigation efficiency that can be improved
Sub- propeller rudder and its ship.
Background technique
By marine main engine (diesel engine, steam turbine, gas turbine etc.), transmission system (shafting, gear-box, shaft coupling, from
Clutch etc.) and propeller (propeller, all direction propeller, sideways-acting propeller etc.) composition ship power system, just as ship
Heart, while providing power for ship, also concerning factors such as the stability of vessel motion, safety and economy.Therefore,
In order to improve the economic benefit and energy utilization rate of ship's navigation, the optimization of ship power system is carried out, guarantees its output power
While with loading capacity, it is particularly important to improve efficiency reduction energy consumption.Dynamical system and rudder system be risen in ship's navigation it is decisive
Two big close associations component, and the rudder blade in existing rudder system is mostly installed in behind propeller, receives water flow punching
Power forms pressure difference and is turned to, even if, because rudder blade itself has forced area, also can in the case where straight trip does not need steering
Resistance is caused to the traveling of ship.
Currently, there is a small amount of spitkit application right-handed screw paddle series connection counterpropeller to promote, right-handed screw is recycled with counterpropeller
The reaction force of paddle increases propulsive force for ship, but counterpropeller recycling reaction force is insufficient in the method, does not also adjust
The function that ship's navigation turns to.There are also the propellers of some improved plan adjustable pitchs to improve steerage, makes part device
Inside propeller hub, complex process influences blade stress intensity, can not also recycle wake flow.
Summary of the invention
For this reason, it may be necessary to provide a kind of sub- propeller rudder that ship's navigation efficiency can be improved, advanced with solving traditional ship
It manipulates resistance caused by rudder blade in the process and the wake flow energy is not fully used and causes to waste, to improve the boat of ship
Row efficiency.
On the other hand, a kind of ship comprising the above-mentioned sub- propeller rudder that ship's navigation efficiency can be improved is provided, to improve
The navigation efficiency of ship and the steering manipulation performance for improving rudder.
To achieve the above object, a kind of sub- propeller rudder that ship's navigation efficiency can be improved is inventor provided, comprising:
Rudderpost is vertically arranged at stern and perpendicular with ship keel extension line；
V-type bracket, including fulcrum and 2 endpoints；
Recycle roller, including drum blade and roller bearing；
Gear case assembly, including first gear case and second gear case, the first gear case include bevel type gear A, umbrella
Type gear B and the first transmission shaft, the second gear case include bevel type gear A, bevel type gear B and second driving shaft；
Sub- propeller, including the first sub- propeller and the second sub- propeller；With
Safety guard, both ends coincide with the arc of first gear case and second gear case sub-assembly fan-shaped plan steel plate to be coupled；
Wherein, 2 bevel type gear A are symmetrically disposed on roller bearing both ends, and 2 bevel type gear B pass through first respectively
One end of transmission shaft and second driving shaft is engaged with bevel type gear A, the other end point of first transmission shaft and second driving shaft
Not Gu Dingshezhi the first sub- propeller and the second sub- propeller, the drum blade be fixedly installed on roller bearing.
Further, the rudderpost is provided with bearing and underwater sealing bearing block and deck bearing block and bearing adapter is firm
Rotation.
The length of rudderpost can be arranged according to drauht and model.
Further, the rudderpost is equipped with 2 rudder arms, and the rudder arm is used to connect the hydraulic arm on hull.
Hydraulic arm on hull is connect with rudder arm, when ship needs to turn to, one side hydraulic arm elongation activity, another side
Hydraulic arm shortening activity, so that rudder arm rotates respective angles toward a direction, driving rudderpost rotates respective angles, drives rudderpost band
Move sub- propeller rudder rotation, torque changes, generate steerage and turn to, therefore, if do not have to hydraulic arm on certain ships but
With air pressure arm or screw rod arm, which is equally applicable.
Further, the rudderpost top is additionally provided with handle hole slot, carries out artificial emergency steering behaviour for being inserted into handle
Make.
It is appreciated that since the rudderpost actually carries the weight of all components on sub- propeller rudder, it is needing
When being rotated to rudderpost, it is inserted into the handle hole slot using handle, can effortlessly realize propeller rudder using lever principle
It rotates freely, to realize the artificial emergency maneuver of hull direction of travel.
Further, the quantity of the V-type bracket is 2-3, and including waterborne and underwater V-type bracket, the fulcrum
It is fixedly installed on the corresponding position of the rudderpost, wherein the underwater V-type bracket fulcrum and rudderpost are close to underwater sealing bearing
Seat, which is set, to be fixedly connected, and two-end-point is fixedly connected with first gear case and second gear case end respectively, with the first transmission shaft and
Second driving shaft forms plane node, carries the motive force of the first sub- propeller and the second sub- propeller.The V-type branch waterborne
Frame fulcrum is fixedly connected with rudderpost deck bearing block top position, endpoint respectively with first gear case and second gear cabinet top
Portion is fixedly connected, can also be solid with first gear case and second gear box body respectively by curved bar according to the shape specification of stern
Fixed connection, can also be by the underwater adaptation position of the fixed pivot connection rudderpost of two V-type brackets, and method be convenient effective
Consolidate the running of sub- propeller.
The effect of V-type bracket is fixed gear-box and recycles roller, and therefore, the size of intensity will most importantly expire
Foot resultant force caused by its fixture and water flow impact pressure, for the ship of different model, because of applicable drum blade size
And gear-box is of different sizes, the quantity and intensity of V-type bracket can increase or decrease correspondingly, connection method can conventional method such as
Make corresponding selection in laser welding, electric welding.
Further, the safety guard is semi-cylindrical lid, and is covered above the recycling roller, both ends and first
The arc of gear-box and second gear case sub-assembly fan-shaped plan steel plate, which coincide, to be coupled, and its role is to avoid careless manipulation
All kinds of accidents, while also having the function of consolidating sub- propeller running.
Further, the blade quantity and size of the described first sub- propeller and the second sub- propeller are completely the same, rotation direction
On the contrary, its end for being installed on the first transmission shaft and second driving shaft, the dextrorotation in left side, left-handed, the formation interflow, to ship on right side
The direction of travel of oceangoing ship generates preferable driving force and steering force.
Further, the two tanks opposite side of the first gear case and second gear case is fan-shaped plan steel plate,
Opposite side is the special-shaped cabinet of the smooth cambered surface of half rugby, and its object is to reduce resistance to water-flow.
The effect of the first gear case and second gear box body is to provide accommodation space for bevel type gear and transmission shaft,
And bearing block needed for roller bearing and the running of each transmission shaft are provided, make roller bearing and the first transmission shaft and second driving shaft with bearing
Rotation is consolidated in corresponding gear-box.
Further, the rudderpost, V-type bracket, recycling roller, curved bar and safety guard are hard steel material, purpose
It is to enhance the stability and safety in the sub- propeller rudder operation.
Inventor additionally provides a kind of ship containing any of the above-described seed propeller rudder.
Inventor provide it is a kind of comprising the above-mentioned sub- propeller rudder that ship's navigation efficiency can be improved and its ship with it is existing
The difference of technology is: above-mentioned technical proposal uses recycling roller, gear case assembly and sub- propeller to pass through V-type branch for main component
Frame is connected on the rudderpost perpendicular with keel extension line, with rudder arm and bearing in the suitable position in ship tail portion, passes through tail
Raw impact force of miscarrying gives drum blade application driving force, makes drum blade that the gear in roller bearing and gear case assembly be driven to turn
It is dynamic, and then sub- propeller rotation is driven, it generates to the forward driving force of ship and adjustable steering force, is exactly the angle of rudderpost
Adjustment can play whole steering-effecting to the sub- propeller rudder, make the ship's navigation using the sub- propeller rudder it is more stable,
Steerage is higher, and propulsive force is stronger, compared with existing improved ship power system, has the advantage that
1, structure is simple, manufacture easy to produce；
2, the reaction force of recycling ship discharge wake flow, is converted into traveling driving force and steering force；
3, the resistance that propeller flings rudder blade is eliminated；
4, the wave making resistance of ship wake is reduced.
Detailed description of the invention
Fig. 1 is a kind of schematic top plan view for the sub- propeller rudder that ship's navigation efficiency can be improved described in the present embodiment；
Fig. 2 is a kind of schematic diagram in the direction sub- propeller rudder A-A ' that ship's navigation efficiency can be improved described in Fig. 1；
Fig. 3 is the son that ship's navigation efficiency can be improved after rudderpost rotates by a certain angle toward the direction B-B ' described in the present embodiment
The variation schematic diagram of propeller rudder；
Fig. 4 is the schematic diagram that V-type bracket described in the present embodiment is fixedly connected by curved bar with gear-box；
Fig. 5 is fixedly connected by curved bar with gear-box for the V-type bracket that another kind described in the present embodiment is applicable in large ship
Schematic diagram；
Fig. 6 is that two V-type bracket fulcrum rudderposts of another kind described in the present embodiment are applicable in the schematic diagram being fixedly connected under water；
Fig. 7 is the schematic diagram that two V-type bracket fulcrum rudderpost gear-boxes of another kind described in the present embodiment are fixedly connected.
Description of symbols:
1, rudderpost；
11, underwater sealing bearing block；
12, deck bearing block；
13, handle hole slot；
2, V-type bracket；
21, curved bar；
31, drum blade；
32, roller bearing；
41, bevel type gear A；
42, bevel type gear B；
43, the first transmission shaft；
44, the first sub- propeller；
45, second driving shaft；
46, the second sub- propeller；
47, special-shaped cabinet；
48, gear housing component fan-shaped steel plate；
49, side bearings seat；
50, side bearings seat bottom；
5, safety guard；
6, rudder arm.
Specific embodiment
Technology contents, construction feature, the objects and the effects for detailed description technical solution, below in conjunction with specific reality
It applies example and attached drawing is cooperated to be explained in detail.
Fig. 1, Fig. 2 are please referred to, a kind of sub- propeller rudder that ship's navigation efficiency can be improved, the sub- spiral shell are present embodiments provided
Rotation paddle rudder is made of rudderpost, V-type bracket, recycling roller, gear case assembly, sub- propeller and safety guard, and rudderpost passes through underwater close
It seals bearing block and deck bearing block and fixes rotation in the hull tail portion adaptation position vertical with keel extension line with adaptation bearing,
Manipulation is connect with hydraulic arm by 2 rudder arms to turn to.According to ship shape, rudderpost lower end be may extend under water, and upper end may extend into first
Above plate.
Fig. 4, Fig. 5 and Fig. 6 are please referred to, because the diversity of ship shape design is adapted to requirement with recycle wake flow, the two of V-type bracket
End can be used straight or curved joining beam docking gear-box fan-shaped steel plate proper site, and the fulcrum of two V-type brackets can be fixedly connected rudder
The underwater of axis is applicable in position, and effect is identical.Referring to Fig. 7, by rudderpost side bearings seat 49 and side bearings seat bottom 50
It is sequentially fixed at the stern steel plate suitable position vertical with keel extension line, V-type bracket 2 and 1 lower end of rudderpost of two adaptations are closed
Right position, which is set, to be fixedly connected, two endpoints of two V-type brackets 2 end at the top of gear-box fan-shaped steel plate and sub- propeller side respectively
Head is fixedly connected, and recycling roller, gear case assembly, sub- propeller and safety guard are fastened on stern propeller rear.The
The motive force of one sub- propeller 44 and the second sub- propeller 46 forms ship through side bearings seat bottom 50 below V-type bracket 2, rudderpost
The motive force of oceangoing ship.
Fig. 1, Fig. 2, Fig. 4, Fig. 5, Fig. 6 and Fig. 7 are please referred to, which includes 8 drum blades and roller bearing, 8 rollings
Cylinder spacing with blades is uniformly fixed on roller bearing, and two ends of roller bearing are each provided with a bevel type gear A, roller bearing center line with
Rudderpost bottom surface uses bearing flexible rotating with height, by two gearbox shaft bearings, and two bevel type gear A of end drives two transmissions respectively
The sub- propeller operating of 2 bevel type gear B transmission two of shaft end head, wherein the first sub- propeller dextrorotation, the second sub- propeller are left-handed.
Blade below recycling roller receives the impact of water flow, and the reaction force of rear propeller is converted into machinery
Can, two sub- propeller rotationals are driven through roller bearing and two pairs of bevel type gears, form forward motive force.When ship needs to turn to,
Hydraulic arm pressure rudder arm, rotates entire sub- propeller rudder, changes the direction of sub- propeller motive force, and then change torque, shape
At ship turning, the manipulation in direction is provided.
Please refer to Fig. 1, Fig. 2, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, the fan-shaped steel plate 48 of first gear cabinet and second gear cabinet
Effect have, in two fan-shaped steel plate garden heart positions, sealed bearing is set, the bearing for roller bearing both ends provides support and operating,
The sealed bearing of box inner wall the setting front-end bearing pedestal and sub- propeller end of fan-shaped steel plate, is the first, second transmission shaft bearing
Support and operating are provided, the respectively bevel type gear A of roller bearing two ends and two transmission shaft end bevel type gear B are ratcheting, in sector
The lid of half American football shape is arranged equipped with the outside of bevel type gear and transmission shaft for steel plate, and its role is to be bevel type gear and transmission
The safe operation of axis provides accommodation space, is the water flow resistance reduced in traveling process there are also the special-shaped lid that half American football shape is arranged
Power.
Further, the arc of two fan-shaped steel plates connects with the end fit of safety head, forms one freely for recycling roller
The safe space of operating.With the blade below the water impact roller bearing of stern discharge, roller bearing rotation is driven, a cylinder is formed
Shape recycles roller, and drum blade rotation generates the rotating Vortex that driving force rotates roller bearing along drum blade to roller bearing.Recycling rolling
Cylinder, first gear case, second gear case and safety guard are linked together with above-mentioned set-up mode, by 2 to 3 V-type brackets by it
Be securely fixed on rudderpost, in different specific embodiments, the stress intensity of V-type bracket is by recycling roller, safety
The weight of cover, first gear case and second gear case determines that wherein the fulcrum of V-type bracket is fixedly connected with rudderpost, 2 endpoints point
It is not fixedly connected with the suitable arc position of fan-shaped steel plate by welding or riveting mode.
It can be seen that such construction is actually common between first gear case and the cabinet and safety guard of second gear case
It constitutes the sub- propeller rudder and is equivalent to " rudder plate ", when the handle hole slot insertion handle on rudderpost, handle force is turned to
When operation, Fig. 3 is referred to, as rudderpost is turned right certain rudder angle, recycling roller, first gear case, second gear case and safety
Covering " rudder plate " formed, also entirety is swung to the left side of ship direction of travel therewith, should when direction is adjusted to the angle needed
Sub- propeller rudder continues to recycle wake flow into the driving force and steering force for being converted into Ship Propeling.
It is appreciated that should be able to be met for a long time due to the accessory that the sub- propeller rudder is ship in water body environment work
Need, and its allow for carrying hydraulic blow therefore should have stronger Corrosion Protection and certain impact strength,
Rudderpost, V-type bracket, recycling roller, curved bar and the safety guard preferred converted steel in material.
A kind of ship for the sub- propeller rudder that ship's navigation efficiency can be improved comprising this, can be any specifications and models, son
Propeller rudder can preset hole in the place of bottom of ship steel plate intersection or add according to applicable Ship production at the model of adaptation
If clip, hoop or cuff mechanism, so that the sealed bearing on rudderpost is passed through screw threads for fastening or tightening of rivet with hull.
The sub- propeller rudder has the beneficial effect that structure is simple, and manufacturing process is easy, and applicable ship model is extensive, steerage
It is high.
It has the beneficial effect that using what the ship of the sub- propeller rudder generated, in the operational process of ship, can efficiently disappear
The vortex energy that the propeller of stern of receiving is discharged, when dead ship condition, sub- propeller rudder slides forward together with the inertia of hull,
Recycling leaf and water flow form opposite flow velocity, and sub- propeller rudder equally operates, and have the function of adjusting hull direction；When ship falls
When car state, water (flow) direction forms roller bearing, bevel type gear group, transmission shaft on the contrary, recycling roller reversion band mover propeller reversion
It is inverted with sub- propeller, equally there is preferable turning function, existing propeller propulsion, hydraulic jet propulsion and the big canoe of various types
Oceangoing ship (except special type workboat) is all suitable for the sub- propeller rudder.
It should be noted that being not intended to limit although the various embodiments described above have been described herein
Scope of patent protection of the invention.Therefore, it based on innovative idea of the invention, change that embodiment described herein is carried out and is repaired
Change, or using equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it directly or indirectly will be with
Upper technical solution is used in other related technical areas, is included within scope of patent protection of the invention.
Claims (10)
1. a kind of sub- propeller rudder that ship's navigation efficiency can be improved characterized by comprising
Rudderpost is vertically arranged at stern and perpendicular with ship keel extension line；
V-type bracket, including fulcrum and 2 endpoints；
Recycle roller, including drum blade and roller bearing；
Gear case assembly, including first gear case and second gear case, the first gear case include bevel type gear A, umbellate form tooth
It takes turns B and the first transmission shaft, the second gear case includes bevel type gear A, bevel type gear B and second driving shaft；
Sub- propeller, including the first sub- propeller and the second sub- propeller；With
Safety guard, both ends coincide with the arc of first gear case and second gear case sub-assembly fan-shaped steel plate to be coupled；
Wherein, 2 bevel type gear A are symmetrically disposed on roller bearing both ends, and 2 bevel type gear B pass through the first transmission respectively
One end of axis and second driving shaft is engaged with bevel type gear A, and the other end of first transmission shaft and second driving shaft is solid respectively
Surely the first sub- propeller is set and the second sub- propeller, the drum blade are fixedly installed on roller bearing.
2. sub- propeller rudder according to claim 1, which is characterized in that the rudderpost water perpendicular in keel extension line
Sealed bearing, bearing block and adaptation is respectively set in lower plate and deck waterborne, and bearing is vertical with rudderpost consolidates.
3. sub- propeller rudder according to claim 2, which is characterized in that the rudderpost is equipped with 2 rudder arms, the rudder arm
For connecting the hydraulic arm on hull.
4. sub- propeller rudder according to claim 3, which is characterized in that the rudderpost top is additionally provided with handle hole slot,
Artificial emergency steering operation is carried out for being inserted into handle.
5. sub- propeller rudder according to claim 1, which is characterized in that the quantity of the V-type bracket is 2-3, and
Including waterborne and underwater V-type bracket, the fixed pivot is set on the corresponding position of the rudderpost, the underwater V-type bracket 2
A endpoint is fixedly connected with gear housing end, remaining is fixedly installed on respectively at the top of first gear case and second gear box body
Or it is fixedly connected respectively with first gear case and second gear box body by curved bar.
6. sub- propeller rudder according to claim 1, which is characterized in that the safety guard is semi-cylindrical lid, is provide with
It coincide above the recycling roller, and with the arc of gear case assembly fan-shaped steel plate.
7. sub- propeller rudder according to claim 1, which is characterized in that the first sub- propeller and the second sub- propeller
Blade quantity and size it is completely the same, it is oppositely oriented.
8. sub- propeller rudder according to claim 1, which is characterized in that the two of the first gear case and second gear case
Cabinet opposite side is fan-shaped plan steel plate, and opposite side is the irregular box of the smooth cambered surface of half rugby.
9. sub- propeller rudder according to claim 1, which is characterized in that the rudderpost, gear case assembly, returns at V-type bracket
Receiving roller, curved bar and safety guard is hard steel material.
10. a kind of ship, which is characterized in that including sub- propeller rudder of any of claims 1-9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811561917.3A CN109455287A (en) | 2018-12-20 | 2018-12-20 | A kind of sub- propeller rudder and its ship that ship's navigation efficiency can be improved |
| CN2018115619173 | 2018-12-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110027693A true CN110027693A (en) | 2019-07-19 |
| CN110027693B CN110027693B (en) | 2024-06-25 |
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ID=65614038
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811561917.3A Withdrawn CN109455287A (en) | 2018-12-20 | 2018-12-20 | A kind of sub- propeller rudder and its ship that ship's navigation efficiency can be improved |
| CN201910314294.8A Active CN110027693B (en) | 2018-12-20 | 2019-04-18 | Sub-propeller rudder capable of improving navigation efficiency of ship and ship with sub-propeller rudder |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811561917.3A Withdrawn CN109455287A (en) | 2018-12-20 | 2018-12-20 | A kind of sub- propeller rudder and its ship that ship's navigation efficiency can be improved |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112339971B (en) * | 2020-11-12 | 2024-03-22 | 中电建(西安)港航船舶科技有限公司 | Double-screw propeller structure with angle adjusting function |
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2018
- 2018-12-20 CN CN201811561917.3A patent/CN109455287A/en not_active Withdrawn
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2019
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110027693B (en) | 2024-06-25 |
| CN109455287A (en) | 2019-03-12 |
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