CN103291551B - A kind of overall yaw type floating marine wind energy turbine set - Google Patents
A kind of overall yaw type floating marine wind energy turbine set Download PDFInfo
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- CN103291551B CN103291551B CN201310225055.8A CN201310225055A CN103291551B CN 103291551 B CN103291551 B CN 103291551B CN 201310225055 A CN201310225055 A CN 201310225055A CN 103291551 B CN103291551 B CN 103291551B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
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Abstract
The present invention relates to a kind of overall yaw type floating marine wind energy turbine set, there is multiple stage yaw type wind power generating set and ring-type raft, every platform yaw type wind power generating set comprises wind wheel, cabin, tower cylinder, bogie, wind wheel is arranged on cabin, cabin is fixed on tower cylinder, is arranged on bogie bottom tower cylinder.Ring-type raft comprises annular orbit, supports multiple floating drums of annular orbit, the bogie of every platform yaw type wind power generating set on annular orbit around the center of circle round and round of ring-type raft.The agent structure of tower cylinder adopts metal space truss or grid structure, and metal space truss or grid structure are made up of the steel plate of different-thickness.Present invention eliminates the yaw system that single wind generator group is independent separately, can rate of fault be reduced, can maintenance cost be reduced and reduce the generation of personal safety accident.Tower cylinder strength and stiffness of the present invention all can significantly improve, and the steel of equal number can improve the bending resistance moment of inertia of tower cylinder greatly.
Description
Technical field
The present invention relates to Offshore Wind Power Generation Technology field, especially a kind of overall yaw type floating marine wind energy turbine set.
Background technique
Offshore wind speed is very abundant, and along with Wind Power Generation Industry is fast-developing, the exploitation of wind-resources turn to ocean by land gradually.In China sea, wind energy content is about 7.5 hundred million kilowatts, is equivalent to 3 times of land wind-powered electricity generation reserves.Offshore wind turbine foundation pattern has gravity fixing, a post fixing type and floating type basis usually, and what install on basis at present is still conventional wind power generating set.
Maximum wind energy is obtained in order to make wind wheel, wind power generating set needs to use yaw system to be in state windward all the time to keep wind wheel, yaw system is arranged between cabin underframe and tower cylinder top usually, use large diameter pivoting support and deviation drive device that cabin is rotated, for avoiding the wind vector vibrated, the driftage gear teeth are caused to produce alternate load, also absorb the vibration of small free deflection with off-course brake or title yawdamper, prevent the alternating stress of yaw gear from causing gear teeth premature harm.This yawing system construction is complicated, poor reliability, safeguards inconvenient.According to statistics, in all faults of Wind turbines, nearly 20% is caused by the driftage bearing damage as pivoting support.If this fault occurs in marine wind electric field, the user and guardian that give generator set are brought great trouble.
Number of patent application is the earlier application of CN201080001036.1 " sea-borne wind power generation apparatus ", discloses the offshore wind turbine that a kind of wind wheel, cabin and pylon one are gone off course.But this electricity generating device adopts the driftage of lower wind direction, ballast is gone off course rotation together with pylon, ballast is provided with many hawsers, hawser is anchored at seabed and the position of wind power generating set is fixed.The offshore wind turbine of this technological scheme is adopted to be nature driftage, hawser knot will inevitably be caused when unit is gone off course with the wind and rotated, when knot to a certain extent time must cause driftage rotational resistance strengthen, also may occur under extreme case that the generation of the situations such as unit topples broken by hawser.
Number of patent application is the earlier application of CN201110293250.5 " offshore combined floating wind power generation platform ", disclose a kind of offshore combined floating wind power generation platform, its ring-type raft is the regular polygon structure mutually supporting formation with truss structure, rely on each floating drum be connected as a single entity with truss to float on sea, realize location by dowel pile.This platform floats on offshore sea, uses the wind power generating set of this scheme that tower cylinder top can only be adopted to go off course, and its tower cylinder cross section is circular or regular polygon structure, and the tower cylinder windage of this shape is large, and bending resistance is weak.In order to satisfied marine unit is to the Rigidity and strength requirement of tower cylinder, the steel plate of relatively thick must be adopted to roll tower cylinder, this can add the difficulty and manufacture cost that roll.Operating cost can be increased in addition because yaw system rate of fault is high, inconvenient maintenance, amount of high-altitude operation large.
Model utility content
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, provides a kind of overall yaw type floating marine wind energy turbine set, can reduce rate of fault, is convenient to safeguard, can reduce maintenance cost.
The technical solution adopted for the present invention to solve the technical problems is: a kind of overall yaw type floating marine wind energy turbine set, there is multiple stage yaw type wind power generating set and ring-type raft, every platform yaw type wind power generating set comprises wind wheel, cabin, tower cylinder, bogie, described wind wheel is arranged on cabin, described cabin is fixed on tower cylinder, is arranged on bogie bottom described tower cylinder.Described ring-type raft comprises annular orbit, supports multiple floating drums of annular orbit, the bogie of every platform yaw type wind power generating set on annular orbit around the center of circle round and round of ring-type raft.
Further, by truss or rod member mechanical connection between the bogie of each yaw type wind power generating set.
When specifically installing and using, ring-type raft is by dowel pile or the marine site being anchored on setting.
Further, the agent structure of tower cylinder adopts metal space truss or grid structure, and metal space truss or grid structure are made up of the steel plate of different-thickness.
Further, the windward side of described tower cylinder and/or leeward end adopt the 3rd thickness steel plate or the second thickness steel plate to make, connected by the first thickness steel plate between the 3rd thickness steel plate that the windward side of described tower cylinder is corresponding with leeward end or the second thickness steel plate, the distance of the 3rd thickness steel plate or the second thickness steel plate distance tower cylinder neutral axis is greater than the distance of the first thickness steel plate distance tower cylinder neutral axis, and the thickness of the 3rd thickness steel plate or the second thickness steel plate is greater than the thickness of the first thickness steel plate.
Or, the windward side of described tower cylinder and/or leeward end adopt the 3rd thickness steel plate to make, described 3rd thickness steel plate transition is connected with the second thickness steel plate, connected by the first thickness steel plate between the second thickness steel plate that the windward side of described tower cylinder is corresponding with leeward end, the distance of the 3rd thickness steel plate distance tower cylinder neutral axis is greater than the distance of the second thickness steel plate distance tower cylinder neutral axis, the distance of the second thickness steel plate distance tower cylinder neutral axis is greater than the distance of the first thickness steel plate distance tower cylinder neutral axis, the thickness of the 3rd thickness steel plate is greater than the thickness of the second thickness steel plate, the thickness of the second thickness steel plate is greater than the thickness of the first thickness steel plate.
Further, the cross section of described tower cylinder is water-drop-shaped or long-round-shape or oval or fusiformis, and listed shape is lower to wind resistance.
Particularly, the cross section of described tower cylinder is water-drop-shaped, the windward side of tower cylinder is arc, the leeward end of tower cylinder is tip, the windward side of tower cylinder and/or leeward end adopt the 3rd thickness steel plate to make, described 3rd thickness steel plate transition is connected with the second thickness steel plate, is connected between the second thickness steel plate that the windward side of described tower cylinder is corresponding with leeward end by the first thickness steel plate.
Particularly, the cross section of described tower cylinder is water-drop-shaped, the windward side of tower cylinder is arc, the leeward end of tower cylinder is tip, the windward side of tower cylinder adopts the second thickness steel plate to make, the leeward end of tower cylinder adopts the 3rd thickness steel plate to make, and described 3rd thickness steel plate transition is connected with the second thickness steel plate, is connected between the second thickness steel plate that the windward side of described tower cylinder is corresponding with leeward end by the first thickness steel plate.
Particularly, the cross section of described tower cylinder is long-round-shape, the windward side of tower cylinder is arc, the leeward end of tower cylinder is arc, the windward side of tower cylinder and/or leeward end adopt the 3rd thickness steel plate or the second thickness steel plate to make, and are connected between the 3rd thickness steel plate that the windward side of described tower cylinder is corresponding with leeward end or the second thickness steel plate by the first thickness steel plate.
Particularly, the cross section of described tower cylinder is oval, the windward side of tower cylinder is arc, the leeward end of tower cylinder is arc, the windward side of tower cylinder and/or leeward end adopt the 3rd thickness steel plate to make, described 3rd thickness steel plate transition is connected with the second thickness steel plate, is connected between the second thickness steel plate that the windward side of described tower cylinder is corresponding with leeward end by the first thickness steel plate.
Particularly, the cross section of described tower cylinder is fusiformis, the windward side of tower cylinder is tip, the leeward end of tower cylinder is tip, the windward side of tower cylinder and/or leeward end adopt the 3rd thickness steel plate or the second thickness steel plate to make, and are connected between the 3rd thickness steel plate that the windward side of described tower cylinder is corresponding with leeward end or the second thickness steel plate by the first thickness steel plate.
The invention has the beneficial effects as follows: during normal work, wind power generating set makes wind wheel initiatively windward by the driving of bogie, if when meeting typhoon or wind power generating set dead electricity, wind power generating set then for naturally going off course, there will not be and turn round cable phenomenon.Overall yaw type floating marine wind energy turbine set of the present invention adopts overall driftage form, driven by multiple bogie, bogie is utilized to rotate realization driftage along annular orbit walking around the ring-type raft center of circle, thus eliminate single wind generator group yaw system independent separately, rate of fault can be reduced, bottom yaw device is convenient to safeguard, can reduce maintenance cost and reduce the generation of personal safety accident.
Because tower cylinder is in wind state all the time, tower cylinder cross section adopts the shape that water-drop-shaped, long-round-shape, ellipse, fusiformis etc. are lower to wind resistance, thus can reduce the load that blower fan bears, and can reduce windage.
In addition, the agent structure of tower cylinder can adopt metal space truss or grid structure, space truss or rack are made up of the steel plate of different-thickness, steel plate is pressed the principle of equal strength and is distributed wall thickness, upwind position and leeward position are thickeied from the steel plate away from tower cylinder position of neutral axis, and by thinning for the steel plate thickness close to position of neutral axis.When using same weight steel, tower cylinder strength and stiffness of the present invention all can significantly improve, and thus can save a considerable amount of steel, and the steel of equal number can improve the bending resistance moment of inertia of tower cylinder greatly.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the connection diagram of bogie and ring-type raft in the present invention;
Fig. 3 is that in the present invention, tower cylinder cross section is the schematic diagram of the mode of execution one of water-drop-shaped;
Fig. 4 is that in the present invention, tower cylinder cross section is the schematic diagram of the mode of execution two of water-drop-shaped;
Fig. 5 is that in the present invention, tower cylinder cross section is oblong schematic diagram;
Fig. 6 is that in the present invention, tower cylinder cross section is oval schematic diagram;
Fig. 7 is that in the present invention, tower cylinder cross section is the schematic diagram of fusiformis;
Wherein: 1. wind power generating set, 2. ring-type raft, 1-1. wind wheel, 1-2. cabin, 1-3. tower cylinder, 1-4. bogie, 2-1. annular orbit, 2-2. floating drum, 1-31. first thickness steel plate, 1-32. second thickness steel plate, 1-33. the 3rd thickness steel plate, 3, rod member, 4. anchor.
Embodiment
The present invention is further illustrated by reference to the accompanying drawings now.The schematic diagram that these accompanying drawings are simplification only illustrates basic structure of the present invention in a schematic way, and therefore it only shows the formation relevant with the present invention.
As shown in Fig. 1 Fig. 2, a kind of overall yaw type floating marine wind energy turbine set, there is multiple stage yaw type wind power generating set 1 and ring-type raft 2, every platform yaw type wind power generating set 1 comprises wind wheel 1-1, cabin 1-2, tower cylinder 1-3, bogie 1-4, wind wheel 1-1 is arranged on the 1-2 of cabin, cabin 1-2 is fixed on tower cylinder 1-3, is arranged on bogie 1-4 bottom tower cylinder 1-3.Be mechanically connected by truss or rod member 3 between the bogie 1-4 of each yaw type wind power generating set 1.Ring-type raft 2 comprises annular orbit 2-1, supports multiple floating drum 2-2 of annular orbit, annular orbit 2-1 is arranged on multiple floating drum 2-2, the bogie 1-4 of every platform yaw type wind power generating set 1 on annular orbit 2-1 around the center of circle round and round of ring-type raft 2.
Ring-type raft 2 entirety is fixed on the marine site of setting by dowel pile or anchor 4.During normal work, wind power generating set 1 makes wind wheel 1-1 initiatively windward by the driving of bogie 1-4, if when meeting typhoon or wind power generating set 1 dead electricity, wind power generating set 1, for naturally going off course, there will not be and turns round cable phenomenon.
Overall yaw type floating marine wind energy turbine set of the present invention adopts overall driftage form, driven by multiple bogie 1-4, bogie 1-4 is utilized to walk around the rotation realization driftage of ring-type raft 2 center of circle along annular orbit 2-1, thus eliminate single wind generator group yaw system independent separately, rate of fault can be reduced, bottom yaw device is convenient to safeguard, can reduce maintenance cost and reduce the generation of personal safety accident.In addition overall driftage form must make whole wind energy turbine set Area comparison large, diameter can reach rice up to a hundred and even go up km, not only be enough to overcome wind power generating set windward time the tilting moment that produces, and be conducive to wind energy turbine set at sea and set up and run, safeguard and accommodation platform.
The agent structure of tower cylinder 1-3 adopts metal space truss or grid structure, and metal space truss or grid structure are made up of the steel plate of different-thickness.
The windward side of tower cylinder 1-3 and/or leeward end adopt the 3rd thickness steel plate 1-33 or the second thickness steel plate 1-32 to make, connected by the first thickness steel plate 1-31 between the 3rd thickness steel plate 1-33 that the windward side of tower cylinder 1-3 is corresponding with leeward end or the second thickness steel plate 1-32, the distance of the 3rd thickness steel plate 1-33 or the second thickness steel plate 1-32 distance tower cylinder neutral axis is greater than the distance of the first thickness steel plate 1-31 distance tower cylinder neutral axis, and the thickness of the 3rd thickness steel plate 1-33 or the second thickness steel plate 1-32 is greater than the thickness of the first thickness steel plate 1-31.
Or, the windward side of tower cylinder 1-3 and/or leeward end adopt the 3rd thickness steel plate 1-33 to make, 3rd thickness steel plate 1-33 transition is connected with the second thickness steel plate 1-32, connected by the first thickness steel plate 1-31 between the second thickness steel plate 1-32 that the windward side of tower cylinder 1-3 is corresponding with leeward end, the distance of the 3rd thickness steel plate 1-33 distance tower cylinder neutral axis is greater than the distance of the second thickness steel plate 1-32 distance tower cylinder neutral axis, the distance of the second thickness steel plate 1-32 distance tower cylinder neutral axis is greater than the distance of the first thickness steel plate 1-31 distance tower cylinder neutral axis, the thickness of the 3rd thickness steel plate 1-33 is greater than the thickness of the second thickness steel plate 1-32, the thickness of the second thickness steel plate 1-32 is greater than the thickness of the first thickness steel plate 1-31.
The cross section of tower cylinder 1-3 is water-drop-shaped or long-round-shape or oval or fusiformis.
As shown in Figure 3, the cross section of tower cylinder 1-3 is water-drop-shaped, mode of execution one: the windward side of tower cylinder 1-3 is tip, the leeward end of tower cylinder 1-3 is arc, the windward side of tower cylinder 1-3 and leeward end adopt the 3rd thickness steel plate 1-33 to make, 3rd thickness steel plate 1-33 transition is connected with the second thickness steel plate 1-32, is connected between the second thickness steel plate 1-32 that the windward side of tower cylinder 1-3 is corresponding with leeward end by the first thickness steel plate 1-31.
As shown in Figure 4, the cross section of tower cylinder 1-3 is water-drop-shaped, mode of execution two: the windward side of tower cylinder 1-3 is arc, the leeward end of tower cylinder 1-3 is tip, the windward side of tower cylinder 1-3 adopts the second thickness steel plate 1-32 to make, the leeward end of tower cylinder 1-3 adopts the 3rd thickness steel plate 1-33 to make, 3rd thickness steel plate 1-33 transition of the leeward end of tower cylinder 1-3 is connected with the second thickness steel plate 1-32, is connected between the second thickness steel plate 1-32 that the windward side of tower cylinder 1-3 is corresponding with leeward end by the first thickness steel plate 1-31.
As shown in Figure 5, the cross section of tower cylinder 1-3 is long-round-shape, the windward side of tower cylinder 1-3 is arc, the leeward end of tower cylinder 1-3 is arc, the windward side of tower cylinder 1-3 and leeward end adopt the 3rd thickness steel plate 1-33 or the second thickness steel plate 1-32 to make, and are connected between the 3rd thickness steel plate 1-33 that the windward side of tower cylinder 1-3 is corresponding with leeward end or the second thickness steel plate 1-32 by the first thickness steel plate 1-31.
As shown in Figure 6, the cross section of tower cylinder 1-3 is oval, the windward side of tower cylinder 1-3 is arc, the leeward end of tower cylinder 1-3 is arc, the windward side of tower cylinder 1-3 and leeward end adopt the 3rd thickness steel plate 1-33 to make, 3rd thickness steel plate 1-33 transition is connected with the second thickness steel plate 1-32, is connected between the second thickness steel plate 1-32 that the windward side of tower cylinder is corresponding with leeward end by the first thickness steel plate 1-31.
As shown in Figure 7, the cross section of tower cylinder 1-3 is fusiformis, the windward side of tower cylinder 1-3 is tip, the leeward end of tower cylinder 1-3 is tip, the windward side of tower cylinder 1-3 and leeward end adopt the 3rd thickness steel plate 1-33 or the second thickness steel plate 1-32 to make, and are connected between the 3rd thickness steel plate 1-33 that the windward side of tower cylinder 1-3 is corresponding with leeward end or the second thickness steel plate 1-32 by the first thickness steel plate 1-31.
Because tower cylinder is in wind state all the time, tower cylinder cross section adopts the shape that water-drop-shaped, long-round-shape, ellipse, fusiformis etc. are lower to wind resistance, thus the load that blower fan bears can be reduced, windage can be reduced, by windage formula: wind resistance=1/2, front × air density × air resistance coefficient × area of contour × velocity squared windward.Compare with plain cylindrical form tower cylinder for the tower cylinder in water-drop-shaped cross section, the air resistance coefficient of cylindrical tower cylinder is about 0.5, and the tower cylinder air resistance coefficient in water-drop-shaped cross section is about 0.05, the projection plane windward of the tower cylinder in water-drop-shaped cross section is also smaller than cylindrical tower cylinder in addition.
In addition, the agent structure of tower cylinder can adopt metal space truss or grid structure, space truss or rack are made up of the steel plate of different-thickness, steel plate is pressed the principle of equal strength and is distributed wall thickness, windward side and leeward end are thickeied from the steel plate away from tower cylinder position of neutral axis, and by thinning for the steel plate thickness close to position of neutral axis.Can obtain, conventional cylindrical tower cylinder maximum stress at about 330MPa, maximum displacement about 1.5m; And adopt the tower cylinder maximum stress of water-drop-shaped cross section uniform strength design at about 200MPa, maximum displacement is at about 0.8m, when using same weight steel, tower cylinder strength and stiffness of the present invention all can significantly improve, thus can save a considerable amount of steel, the steel of equal number can improve the bending resistance moment of inertia of tower cylinder greatly.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on specification, must determine its technical scope according to right.
Claims (8)
1. an overall yaw type floating marine wind energy turbine set, it is characterized in that: there is multiple stage yaw type wind power generating set (1) and ring-type raft (2), every platform yaw type wind power generating set (1) comprises wind wheel (1-1), cabin (1-2), tower cylinder (1-3), bogie (1-4), described wind wheel (1-1) is arranged on cabin (1-2), described cabin (1-2) is fixed on tower cylinder (1-3), described tower cylinder (1-3) bottom is arranged on bogie (1-4), described ring-type raft (2) comprises annular orbit (2-1), support multiple floating drums (2-2) of annular orbit (2-1), the bogie (1-4) of every platform yaw type wind power generating set on annular orbit (2-1) around the center of circle round and round of ring-type raft (2),
The agent structure of described tower cylinder (1-3) adopts metal space truss or grid structure, and metal space truss or grid structure are made up of the steel plate of different-thickness;
The windward side of described tower cylinder (1-3) adopts the 3rd thickness steel plate (1-33) or the second thickness steel plate (1-32) to make, the leeward end of tower cylinder (1-3) adopts the 3rd thickness steel plate (1-33) or the second thickness steel plate (1-32) to make, connected by the first thickness steel plate (1-31) between the 3rd thickness steel plate (1-33) that the windward side of described tower cylinder is corresponding with leeward end or the second thickness steel plate (1-32), the distance of the 3rd thickness steel plate (1-33) or the second thickness steel plate (1-32) distance tower cylinder neutral axis is greater than the distance of the first thickness steel plate (1-31) distance tower cylinder neutral axis, the thickness of the 3rd thickness steel plate (1-33) or the second thickness steel plate (1-32) is greater than the thickness of the first thickness steel plate (1-31).
2. one according to claim 1 overall yaw type floating marine wind energy turbine set, is characterized in that: by truss or rod member (3) mechanical connection between the bogie (1-4) of each yaw type wind power generating set (1).
3. one according to claim 1 overall yaw type floating marine wind energy turbine set, it is characterized in that: when the windward side of described tower cylinder (1-3) and leeward end adopt the 3rd thickness steel plate (1-33) to make, described 3rd thickness steel plate (1-33) transition is connected with the second thickness steel plate (1-32), connected by the first thickness steel plate (1-31) between the second thickness steel plate (1-32) that the windward side of described tower cylinder (1-3) is corresponding with leeward end, the distance of the 3rd thickness steel plate (1-33) distance tower cylinder neutral axis is greater than the distance of the second thickness steel plate (1-32) distance tower cylinder neutral axis, the distance of the second thickness steel plate (1-32) distance tower cylinder neutral axis is greater than the distance of the first thickness steel plate (1-31) distance tower cylinder neutral axis, the thickness of the 3rd thickness steel plate (1-33) is greater than the thickness of the second thickness steel plate (1-32), the thickness of the second thickness steel plate (1-32) is greater than the thickness of the first thickness steel plate (1-31).
4. one according to claim 1 or 3 overall yaw type floating marine wind energy turbine set, is characterized in that: the cross section of described tower cylinder (1-3) is water-drop-shaped or long-round-shape or oval or fusiformis.
5. one according to claim 3 overall yaw type floating marine wind energy turbine set, it is characterized in that: the cross section of described tower cylinder (1-3) is water-drop-shaped, the windward side of tower cylinder (1-3) is arc, and the leeward end of tower cylinder (1-3) is tip.
6. one according to claim 1 overall yaw type floating marine wind energy turbine set, it is characterized in that: the cross section of described tower cylinder (1-3) is water-drop-shaped, the windward side of tower cylinder (1-3) is arc, the leeward end of tower cylinder (1-3) is tip, the windward side of tower cylinder (1-3) adopts the second thickness steel plate (1-32) to make, the leeward end of tower cylinder (1-3) adopts the 3rd thickness steel plate (1-33) to make, described 3rd thickness steel plate (1-33) transition is connected with the second thickness steel plate (1-32), connected by the first thickness steel plate (1-31) between the second thickness steel plate (1-32) that the windward side of described tower cylinder is corresponding with leeward end.
7. one according to claim 1 overall yaw type floating marine wind energy turbine set, it is characterized in that: the cross section of described tower cylinder (1-3) is long-round-shape, the windward side of tower cylinder (1-3) is arc, the leeward end of tower cylinder (1-3) is arc, the windward side of tower cylinder (1-3) and leeward end adopt the 3rd thickness steel plate (1-33) or the second thickness steel plate (1-32) to make, connected by the first thickness steel plate (1-31) between the 3rd thickness steel plate (1-33) that the windward side of described tower cylinder (1-3) is corresponding with leeward end or the second thickness steel plate (1-32).
8. one according to claim 1 overall yaw type floating marine wind energy turbine set, it is characterized in that: the cross section of described tower cylinder (1-3) is fusiformis, the windward side of tower cylinder (1-3) is tip, the leeward end of tower cylinder (1-3) is tip, the windward side of tower cylinder (1-3) and leeward end adopt the 3rd thickness steel plate (1-33) or the second thickness steel plate (1-32) to make, connected by the first thickness steel plate (1-31) between the 3rd thickness steel plate (1-33) that the windward side of described tower cylinder (1-3) is corresponding with leeward end or the second thickness steel plate (1-32).
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