阅读说明：本技术 一种海上风电机组运输方法及其叶轮组装方法 (Offshore wind turbine generator transportation method and impeller assembly method thereof ) 是由 刘同乐 陈凯欣 夏惠峰 马振军 麦志辉 张静波 吴平平 李光远 黄银来 喻祥 于 2020-12-15 设计创作，主要内容包括：本发明公开一种海上风电机组运输方法及其叶轮组装方法,其中,所述叶轮组装方法包括：将轮毂从运输工装上分离,然后吊至平台甲板的组装工位；将轮毂固定在轮毂支架转接盘上；将螺栓和橡胶圈旋进法兰螺栓孔内；将变浆调试箱放置在轮毂附近,并用电源线和控制手柄连接变桨电机；在三根叶片的叶根法兰处涂抹密封胶,用吊车将三根叶片吊起,使三根叶片的叶根法兰与轮毂叶根轴承法兰相接触,然后将三根叶片与轮毂连接；叶轮组装后,拆卸变桨调试箱；安装轮毂前端出口框及盖板组件,并使用密封胶将轮毂外露的螺栓进行密封处理。安装工序简单,操作方便、组装成本低,工作效率更高。(The invention discloses an offshore wind turbine generator transportation method and an impeller assembly method thereof, wherein the impeller assembly method comprises the following steps: separating the hub from the transportation tool, and then hoisting the hub to an assembly station of a platform deck; fixing a hub on a hub bracket adapter plate; screwing the bolt and the rubber ring into the bolt hole of the flange; placing the pitch-variable debugging box near the hub, and connecting a power line and a control handle with a pitch-variable motor; coating sealant on blade root flanges of the three blades, hoisting the three blades by using a crane to enable the blade root flanges of the three blades to be in contact with a hub blade root bearing flange, and then connecting the three blades with a hub; after the impeller is assembled, the variable-pitch debugging box is disassembled; and installing the front end outlet frame of the hub and the cover plate assembly, and sealing the exposed bolt of the hub by using sealant. The installation process is simple, convenient operation, assembly cost are low, and work efficiency is higher.)

1. A method for assembling an impeller of an offshore wind turbine unit, comprising:

s1, separating the hub from the transportation tool, and then hoisting the hub to an assembly station of the platform deck;

s2, fixing the hub on the hub bracket adapter plate;

s3, screwing the bolt and the rubber ring into the bolt hole of the hub and blade root bearing flange;

s4, placing the pitch-variable debugging box near the hub, and connecting the pitch-variable motor with a power line and a control handle;

s5, hoisting the first blade by using a crane to enable a blade root flange of the first blade to be in contact with a blade root bearing flange of the hub, and then connecting the first blade with the hub;

s6, installing a second blade and a third blade by adopting the step S5;

s7, disassembling the variable pitch debugging box;

and S8, mounting the front end outlet frame of the hub and the cover plate assembly.

2. The method for assembling an impeller of an offshore wind turbine according to claim 1, wherein the step S3, before screwing the bolt and the rubber ring into the bolt hole of the flange, further comprises: cleaning stains and oil stains on the first blade, the second blade and the third blade, polishing burrs on flanges of the first blade, the second blade and the third blade by using an angle grinder and a polishing piece, and cleaning flange surfaces of the first blade, the second blade and the third blade.

3. The method for assembling an impeller of an offshore wind turbine according to claim 1, wherein the step S5 of hoisting the first blade by the crane to bring the root flange of the first blade into contact with the hub root bearing flange and then connecting the first blade to the hub comprises:

s51, arranging a sling at the first blade, coating sealant at a flange of the first blade root, hanging the first blade root by a main hook, and hanging the first blade leaf by a crawler crane;

s52, hanging the first blade at the flange interface of the bearing of the blade root of the hub, assembling until the bolt installed on the first blade is 5-15 mm away from the variable-pitch bearing, operating the variable-pitch operation box to enable the inner ring of the variable-pitch bearing to rotate, and aligning the zero point of the 0 scale mark of the root of the first blade with the 0 mark line on the turntable of the bearing of the blade root;

and S53, adjusting the position of the first blade to enable all the bolts to penetrate into the variable-pitch bearing hole, arranging nuts, and fastening the bolts by using a stretcher according to crossed and symmetrical fastening bolts and then crossed and symmetrical pre-tightening forces.

4. The method for assembling an impeller of an offshore wind turbine according to claim 3, wherein the step S53 is performed by adjusting the position of the first blade so that all bolts penetrate into the holes of the pitch bearing, and the bolts are fastened by using the stretcher in a crossed and symmetrical manner and then in a crossed and symmetrical pre-tightening manner, and further comprising:

and S54, making a locking mark.

5. Method for assembling a rotor of an offshore wind turbine according to any of claims 1 to 4, wherein the method is adapted to be carried out at wind speeds of less than 8m/s to 12 m/s.

6. A method of transporting an offshore wind turbine, comprising:

establishing a wind power installation platform;

the wind power installation platform assists a transport barge in transporting an offshore wind power generation unit comprising an impeller assembled by the impeller assembly method of any one of claims 1 to 5.

7. The method of transporting an offshore wind turbine as set forth in claim 6, wherein the wind power installation platform comprises: platform deck, around pile crane, truss-like spud leg, blade transportation district, wheel hub transportation district, deck impeller equipment district.

8. The method of transporting an offshore wind turbine generator as set forth in claim 7, wherein said deck wheel assembly area coincides with a blade transport area.

9. The method for transporting an offshore wind turbine according to claim 7, wherein the pile-winding crane is used to hoist the blades in the blade transportation area to the transportation vessel, then the assembly of the blade is started at the deck blade assembly site, and the pile-winding crane is used to complete the hoisting, assembly and transportation of the blades.

10. Method of transporting an offshore wind energy plant according to any of the claims 7-9, characterized in that the transportation barge is located 5-8 meters to the right of the wind power installation platform before the transportation takes place.

Technical Field

The invention relates to the technical field of wind power generation, in particular to an offshore wind turbine generator transportation method and an impeller assembly method thereof.

Background

Wind power generation is the fastest-developing green energy technology in the world, people have noticed some limitations on land wind energy utilization such as large occupied area, noise pollution and the like while land wind power plant construction is rapidly developed, and the ocean becomes a rapidly-developing wind power market due to abundant wind energy resources on the ocean and feasibility of the current technology.

The impeller of the offshore wind generating set mainly comprises a hub and three blades, and the methods for assembling the impeller in the prior art are many and mainly comprise a land assembling method and an offshore hoisting method.

The offshore hoisting method can be roughly divided into two parts, namely, an impeller is divided into two parts, the first part is the impeller with two blades fixed on a hub, and the second part is a third blade. Firstly, the first part shaped like a rabbit ear is hoisted to the tower cylinder in place by a rabbit ear type hoisting method, and then the second part, namely the third blade is hoisted, so that the assembly of the impeller is completed. The other method is that the hub is hoisted firstly, and then the three blades are horizontally assembled by utilizing the barring gear and the crane respectively, so that the impeller is assembled. The method needs to use a plurality of special clamps, and needs to spend a large amount of time when the blade and the hub are positioned and butted, so that the whole working efficiency is low, the cost is high, and the safety in the working process is low.

The onshore assembly method is to assemble the hub and the three blades at the wharf installation site and then finish the transportation work by using a special transportation barge. Compared with an offshore hoisting method, the assembling method reduces the time of hoisting and butting the blades on the sea, further improves the working efficiency, but needs other special transportation barges to finish the transportation work of the impeller, and has complex installation procedures.

Disclosure of Invention

The invention mainly aims to provide an impeller assembling and transporting method of an offshore wind turbine generator system, and aims to solve the technical problems of low overall operation efficiency, high cost and low safety in the operation process of the conventional impeller assembling and transporting.

In order to achieve the above object, the present invention provides an impeller assembling method for an offshore wind turbine, which at least comprises the following steps:

s1, separating the hub from the transportation tool, and then hoisting the hub to an assembly station of the platform deck;

s2, fixing the hub on the hub bracket adapter plate;

s3, screwing the bolt and the rubber ring into the bolt hole of the hub and blade root bearing flange;

s4, placing the pitch-variable debugging box near the hub, and connecting the pitch-variable motor with a power line and a control handle;

s5, hoisting the first blade by using a crane to enable a blade root flange of the first blade to be in contact with a blade root bearing flange of the hub, and then connecting the first blade with the hub;

s6, installing a second blade and a third blade by adopting the step S5;

s7, disassembling the variable pitch debugging box;

and S8, mounting the front end outlet frame of the hub and the cover plate assembly.

Preferably, before the step S3 of screwing the bolt and the rubber ring into the bolt hole of the flange, the method further includes: cleaning stains and oil stains on the first blade, the second blade and the third blade, polishing burrs on the first blade, the second blade and the third blade flange by using an angle grinder and a polishing piece, and cleaning the flange surfaces of the second blade and the third blade.

Preferably, the step S5 of hoisting the first blade by the crane to make the blade root flange of the first blade contact with the hub blade root bearing flange, and then connecting the first blade to the hub includes:

s51, arranging a sling at the first blade, coating sealant at a flange of the first blade root, hanging the first blade root by a main hook, and hanging the first blade leaf by a crawler crane;

s52, hanging the first blade at the flange interface of the bearing of the blade root of the hub, assembling until the bolt installed on the first blade is 5-15 mm away from the variable-pitch bearing, operating the variable-pitch operation box to enable the inner ring of the variable-pitch bearing to rotate, and aligning the zero point of the 0 scale mark of the root of the first blade with the 0 mark line on the turntable of the bearing of the blade root;

and S53, adjusting the position of the first blade to enable all the bolts to penetrate into the variable-pitch bearing hole, arranging nuts, and fastening the bolts by using a stretcher according to crossed and symmetrical fastening bolts and then crossed and symmetrical pre-tightening forces.

Preferably, the S53, adjusting the position of the first blade to enable all the bolts to penetrate into the pitch bearing holes, and after the bolts are fastened by using the stretcher, according to the cross and symmetrical fastening force and then the cross and symmetrical pre-tightening force, the method further includes:

and S54, making a locking mark.

Preferably, the impeller assembly method is adapted to be carried out at wind speeds of less than 8m/s to 12 m/s.

Correspondingly, the invention also provides a transportation method of the offshore wind turbine generator, which at least comprises the following steps:

establishing a wind power installation platform;

the wind power installation platform assists a transportation barge to transport an offshore wind power generator set, and the offshore wind power generator set comprises an impeller assembled by the impeller assembling method.

Preferably, the wind power installation platform comprises: platform deck, around pile crane, truss-like spud leg, blade transportation district, wheel hub transportation district, deck impeller equipment district.

Preferably, the deck wheel assembly zone coincides with the blade transport zone.

Preferably, the blades in the blade transportation area are hoisted to a transportation ship by the pile-winding crane, then the impeller assembly is started at a deck impeller assembly position, and the hoisting, assembly and transportation of the blades are completed by the pile-winding crane.

Preferably, the transportation barge is located 5-8 meters to the right of the wind power installation platform before transportation.

According to the offshore wind turbine generator transportation method and the impeller assembly method thereof, the self-propelled self-elevating wind turbine installation platform is utilized, so that the blades and the hubs of the wind turbine generator can be conveniently transported, and the transportation amount of the blades and the hubs of the wind turbine generator in single operation is increased; when the impeller is assembled, the blade adopts a double-point hoisting mode, after the blade is hoisted in place, the blade and a hoisting tool can be conveniently fixed through a clamping device and a positioning adjusting device on the hoisting tool, a crane connected with the hoisting tool is started to hoist the blade, after the blade is hoisted, the blade is finely tuned through a control handle, the position of the blade is adjusted, all bolts are enabled to smoothly penetrate into a bearing hole of the blade, the operation is flexible and simple, the blade can be adjusted at any time, and the blade is convenient and reliable to hoist and mount integrally, and the blade lifting device has the characteristics of simple integral installation process, convenience in operation, low assembly cost, high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a flow chart of an impeller assembly method of an offshore wind turbine according to the present invention;

FIG. 2 is a schematic structural view of a vane wheel set pair of FIG. 1;

FIG. 3 is a schematic view of an assembly structure of the impeller shown in FIG. 1;

FIG. 4 is a schematic view of the fan hub mechanism of FIG. 1;

FIG. 5 is a schematic view of a hub transport tooling mechanism of FIG. 1;

FIG. 6 is a schematic view of the blade suspension point mechanism of FIG. 1;

FIG. 7 is a side view of the first, second and third blades of FIG. 1;

FIG. 8 is a flow chart of a transportation method of the offshore wind turbine according to the present invention;

fig. 9 is a schematic structural view of the wind power installation platform used in fig. 8.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Wheel hub	2	Hub transportation area
3	Truss type pile leg	4	Blade transport area
				5	First blade	6	Second oneBlade
7	Third blade	8	Platform deck
				9	Pile winding crane	10	Deck impeller assembly area
11	Bolt hole	12	Hub bracket switching disk
				13	Blade root suspension point	14	Blade hanging point
15	Sealing glue	16	Blade flange

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides an impeller assembling method of an offshore wind turbine generator system. The invention relates to an impeller assembling method of an offshore wind turbine generator, which is used for wind power generation and the like.

FIG. 1 is a flow chart of an impeller assembly method of an offshore wind turbine according to the present invention; FIG. 2 is a schematic structural view of a vane wheel set pair of FIG. 1; FIG. 3 is a schematic view of an assembly structure of the impeller shown in FIG. 1; FIG. 4 is a schematic view of the fan hub mechanism of FIG. 1; FIG. 5 is a schematic view of a hub transport tooling mechanism of FIG. 1; FIG. 6 is a schematic view of the blade suspension point mechanism of FIG. 1; FIG. 7 is a side view of the first, second and third blades of FIG. 1. The impeller assembling method is suitable for being carried out at the wind speed of less than 8-12 m/s. When the wind speed is less than 8 m/s-12 m/s, the impeller assembling positions are reasonably arranged according to the pile legs and the crane positions, the platform deck blades are hoisted by adopting a main crane and crawler crane hoisting mode, the first blade is hoisted on the right side of the platform, and the second blade and the third blade are hoisted on the left side of the platform, so that the interference between the impeller and the crane pile legs in the assembling process is further avoided.

In an embodiment of the present invention, as shown in fig. 1 to 7, a method for assembling an impeller of an offshore wind turbine includes at least the steps of:

s1, separating the hub 1 from the transportation tool, and then hoisting the hub to an assembly station of the platform deck;

firstly, the hub 1 on the deck of the platform is disassembled, so that the hub is separated from the transportation tool.

S2, fixing the hub 1 on the hub bracket adapter plate 12;

the hub 1 is fixed on the hub bracket adapter plate 12, so that the hub 1 is convenient to fix.

S3, screwing the bolt and the rubber ring into the bolt hole 11 of the hub and blade root bearing flange;

step S3, before screwing the bolt and the rubber ring into the flange bolt hole 11, further includes: cleaning up smudges and greasy dirt on first blade 5, second blade 6, the third blade 7, polish the burr on first blade 5, second blade 6, the flange 16 of third blade 7 with the angle mill with the piece of polishing, clear up first blade 5, second blade 6, the flange face of third blade 7. In order to make the installation work smoother, the dirt on each blade needs to be cleaned, and the cleaning work can be carried out by using a clean rag or a special cleaning agent.

S4, placing the pitch-variable debugging box near the hub 1, and connecting a pitch-variable motor with a power line and a control handle;

the pitch-variable debugging box is placed near the hub and is connected with the pitch-variable motor through the power line and the control handle, so that the pitch-variable debugging box has a pitch-variable condition. The variable pitch debugging box is used as a variable pitch system, is used as one of core parts of a control system of a large-scale wind turbine generator, and plays an important role in safe, stable and efficient operation of the generator. Stable pitch control is indispensable in wind turbine generators.

The pitch control technology is simply that the attack angle of airflow to the blades is changed by adjusting the pitch angle of the blades, and then the aerodynamic torque and the aerodynamic power captured by the wind wheel are controlled.

S5, hoisting the first blade 5 by using a crane to enable a blade root flange of the first blade 5 to be in contact with a blade root bearing flange of the hub 1, and then connecting the first blade 5 with the hub 1;

in specific implementation, step S5 may further include the steps of:

s51, arranging a sling at the first blade 5, coating sealant at a blade root flange of the first blade 5, hanging the blade root of the first blade 5 by a main hook, and hanging the blade root of the first blade 5 by a crawler crane as shown by a blade root hanging point 13 and a blade hanging point 14; the blade adopts a double-point hoisting mode of a blade root hoisting point 13 and a blade hoisting point 14, so that the coordination and balance are better, and a hoisting rigging can be arranged at the appointed position of the first blade 5 according to the operation requirement;

s52, hanging the first blade 5 at the flange interface of the bearing of the blade root of the hub, assembling until the bolt installed on the first blade 5 is 5-15 mm away from the variable-pitch bearing, operating the variable-pitch operation box to rotate the inner ring of the variable-pitch bearing, and aligning the zero point of the 0 scale mark of the root of the first blade 5 with the 0 mark line on the turntable of the bearing of the blade root;

s53, adjusting the position of the first blade 5 to enable all the bolts to penetrate into the variable-pitch bearing hole, arranging nuts, fastening the bolts by using a stretcher in a crossed and symmetrical mode, and then fastening the bolts by using crossed and symmetrical pretightening forces;

and S54, making a locking mark.

S6, installing the second blade 6 and the third blade 7 by adopting the step S5;

during the hoisting process, attention is paid to avoid interference with the crane pile leg. The blade root part of the blade is hoisted by the crawler, the tooling position in the main hoisting hook hoisting blade is arranged, and the installation mode is the same as that of the first blade. And stretching all the bolts according to the operation requirement and making anti-loosening marks.

S7, disassembling the variable pitch debugging box;

when the hub and the three blades are assembled, the impeller is assembled, and the variable-pitch debugging box is disassembled.

And S8, mounting the front end outlet frame and the cover plate assembly of the hub 1.

After the front end outlet frame and the cover plate assembly of the hub 1 are installed, all exposed bolts of the hub need to be completely sealed by using a sealant 15 in order to keep the integrity and the sealing performance of the impeller.

Example two

FIG. 8 is a flow chart of a transportation method of the offshore wind turbine according to the present invention; fig. 9 is a schematic structural view of the wind power installation platform used in fig. 8. As shown in fig. 8 and 9, a method for transporting an offshore wind turbine includes at least the steps of:

s21, establishing a wind power installation platform;

wind-powered electricity generation mounting platform includes: platform deck 8, around pile crane 9, truss-like spud leg 3, blade transportation district 4, wheel hub transportation district 2, deck impeller equipment district 10. The deck wheel assembly zone 10 coincides with the blade transport zone 4.

In specific implementation, step S21, establishing the wind power installation platform further includes:

s211, establishing a wind power installation platform, wherein a hub transportation area, a blade transportation area and a deck impeller assembly area are arranged on the wind power installation platform;

s212, connecting and fixing the fan hub and the hub transportation area transportation tool, and placing the blades in the blade transportation area, wherein the blades are perpendicular to the bow and the tail of the ship.

And S22, assisting a transportation barge to transport the offshore wind turbine generator by the wind power installation platform, wherein the offshore wind turbine generator comprises the impeller assembled by the impeller assembling method. Please refer to the first embodiment, which will not be described herein.

After the deck blades are assembled, waiting for the blade transportation barge to be in place, positioning by using a berthing ship, and positioning the blade transportation barge to the position 5-8 meters on the right side of the self-propelled self-elevating wind power installation platform. And hoisting the first blade 5, the second blade 6 and the third blade 7 of the blade transportation area 4 to a transportation ship by using a pile-winding crane 9, then starting to assemble the impellers at a deck impeller assembly position, and completing the hoisting and assembling of the blades by using the pile-winding crane 9.

The wind power installation platform can be designed as a self-elevating self-propelled platform. The self-elevating self-navigating multifunctional platform, also called as a Liftboat, can be provided with elevating pile legs and a propulsion system, when in operation, the pile legs are inserted into or seated in the sea bottom, the ship body can climb up along the pile legs and leave the sea surface, and the bottom of the ship body is separated from the sea surface by a certain distance (air gap), so that the self-elevating self-navigating multifunctional platform can not be influenced by the movement of seawater when in work; after the operation is finished, the pile legs are retracted, the ship body is in a floating state, and a propulsion system equipped on the platform can self-navigate to a new working area, so that the marine towing operation is avoided. The self-elevating self-navigating multifunctional platform can also carry workover equipment, heavy cranes and the like, and is used for operation purposes of oil fields, wind power installation, water building installation and the like.

By implementing the offshore wind turbine generator transportation method and the impeller assembly method thereof, the self-propelled self-elevating wind turbine installation platform is utilized, so that the blades and the hubs of the wind turbine generator can be conveniently transported, and the transportation amount of the blades and the hubs of the wind turbine generator in single operation is increased; when the impeller is assembled, the blade adopts a double-point hoisting mode, after the blade is hoisted in place, the blade and a hoisting tool can be conveniently fixed through a clamping device and a positioning adjusting device on the hoisting tool, a crane connected with the hoisting tool is started to hoist the blade, after the blade is hoisted, the blade is finely tuned through a control handle, the position of the blade is adjusted, all bolts are enabled to smoothly penetrate into a bearing hole of the blade, the operation is flexible and simple, the blade can be adjusted at any time, and the blade is convenient and reliable to hoist and mount integrally, and the blade lifting device has the characteristics of simple integral installation process, convenience in operation, low assembly cost, high.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.