A tandem dual-rotor wind turbine and a hoisting method

Abstract

The present application provides a tandem dual-rotor wind turbine and a hoisting method. In the first aspect, a tandem dual-rotor wind turbine is provided, which includes: a tower barrel, a nacelle, a front rotor, a rear rotor, and a drive chain coupling. In the second aspect, a hoisting method for a tandem dual-rotor wind turbine is provided, which includes: hoisting the tower barrel and fixedly installing the tower barrel on the tower base platform; hoisting the nacelle and fixedly installing the nacelle on the top surface of the tower barrel; hoisting the rear rotor and fixedly installing the rear rotor at the rear end of the nacelle by using a rotor installation method; yawing the nacelle, after the rear rotor hoisting is completed, rotating the boom of the main hoisting equipment by 180°, then moving a preset distance in a direction away from the tower barrel, and finally pitching the rear rotor blades to the leading edge forward and performing a 180-degree yaw; hoisting the front rotor and fixedly installing the front rotor at the front end of the nacelle by using a rotor installation method. The wind turbine and the method can greatly reduce the construction operation area, improve the hoisting efficiency, and save the hoisting time and economic cost.

Description

Technical Field

[0001] This application relates to the field of wind power generation construction, and particularly to a tandem dual-rotor wind turbine and a hoisting method. Background Art

[0002] In recent years, with the progress of technology, the blade size of wind turbines has increased sharply, and the wind energy capture efficiency of traditional single-rotor wind turbines has approached the theoretical limit.

[0003] The dual-rotor wind turbine draws on the mature multi-stage utilization concept of traditional thermal power, hydropower and other power generation technologies. By using the front and rear rotors in coordination, the rear rotor can absorb the remaining energy of the airflow behind the first rotor, solving the problem of multi-stage impeller collaborative energy capture and efficient gradient utilization of wind energy, and long-term restricting problems such as low wind energy capture efficiency and oversized blade size of wind turbines. The dual-rotor unit can reduce the single-machine cost by 10%, increase the wind energy utilization rate by 15%, reduce the wind turbine impeller size by nearly half, and double the wind energy capture power per unit swept area under the rated power.

[0004] In the prior art, the conventional installation method for installing a dual-rotor wind turbine is to use the movement of a crane to install the rotors on both sides respectively. Since the total weight of the crane and the lifted object is as high as several hundred tons, there are high requirements for the bearing capacity of the ground, and it is necessary to carry out replacement filling and hardening treatment on the construction working surface in advance. Due to the need to meet the movement requirements of the crane in the prior art, the required construction working surface is large, and a great deal of time and economic costs need to be paid. Summary of the Invention

[0005] To solve this technical problem, this application provides a tandem dual-rotor wind turbine and a hoisting method, which can greatly reduce the construction working area, improve the hoisting efficiency, and save the time and economic costs of hoisting.

[0006] To achieve the purpose of this application, this application is implemented through the following technical solutions:

[0007] On the one hand, this application provides a tandem dual-rotor wind turbine, including: a tower barrel, a nacelle, a front rotor, a rear rotor, and a drive chain coupling;

[0008] The tower barrel is fixedly connected to the tower base platform and is used to erect the nacelle;

[0009] The nacelle is erected on the tower barrel, and the center points of the top surface of the tower barrel and the bottom surface of the nacelle are fixedly connected. Both the front and rear ends of the nacelle have mounting surfaces for connecting the rotors;

[0010] The front rotor is rotationally connected to the front end of the nacelle through a hub;

[0011] The rear wind turbine is rotationally connected to the rear end of the nacelle through a hub;

[0012] The drive chain coupling is arranged between the gearbox of the front wind turbine and the generator, with one end fixedly connected to the end face of the brake disc of the front wind turbine gearbox and the other end fixedly connected to the diaphragm mounting surface of the generator coupling.

[0013] Optionally, the blades of the front wind turbine and the rear wind turbine have trailing edge lifting point markings.

[0014] In a possible implementation manner, the tower barrel is divided into three sections, and each section of the tower barrel is fixedly connected through a flange sealed with sealant.

[0015] In a possible implementation manner, the top cover of the nacelle has a lightning rod, a safety guardrail, a meteorological mast and a radiator rain cover.

[0016] In a possible implementation manner, the top cover of the nacelle also has a lifting hole and a lifting hole cover.

[0017] In a possible implementation manner, the front end mounting surface of the nacelle has a first mounting mark; the rear end mounting surface of the nacelle has a second mounting mark.

[0018] In a possible implementation manner, the hub of the front wind turbine has a first corresponding mounting mark corresponding to the first mounting mark, and the hub of the rear wind turbine has a second corresponding mounting mark corresponding to the second mounting mark.

[0019] In a possible implementation manner, the connecting surface of the hub of the front wind turbine and the main shaft of the front end mounting surface of the nacelle has a zero position mark; the connecting surface of the hub of the rear wind turbine and the main shaft of the rear end mounting surface of the nacelle also has a zero position mark.

[0020] In a possible implementation manner, the tandem dual-wind turbine wind power generation unit also has electrical components; the electrical components are used for connecting the internal pitch control system of the front wind turbine and the internal control system of the nacelle, and for connecting the internal pitch control system of the rear wind turbine hub and the internal control system of the nacelle.

[0021] In a possible implementation manner, the tower barrel is fixedly connected to the tower base platform through a flange sealed with sealant.

[0022] In a possible implementation manner, the tower barrel and the nacelle are fixedly connected by bolts passing through the inner ring of the shaft.

[0023] In a second aspect, the present application provides a method for hoisting a tandem dual-wind turbine wind power generation unit, including:

[0024] Hoisting the tower barrel and fixedly installing the tower barrel on the tower base platform;

[0025] The nacelle hoisting, fixing and installing the nacelle on the top surface of the tower barrel;

[0026] The rear wind turbine hoisting, fixing and installing the rear wind turbine at the rear end of the nacelle by using the wind turbine installation method;

[0027] The nacelle yawing, after the rear wind turbine hoisting is completed, rotating the boom of the main hoisting equipment by 180°, then moving a preset distance in the direction away from the tower barrel, and finally pitching the rear wind turbine blades to the front of the blade edge and performing a 180-degree yaw;

[0028] The front wind turbine hoisting, fixing and installing the front wind turbine at the front end of the nacelle by using the wind turbine installation method.

[0029] In a possible implementation manner, before the tower barrel hoisting, it further includes: hoisting preparation, selecting a suitable hoisting equipment according to the actual weight and hoisting height requirements of the components of the double wind turbine generator set.

[0030] In a possible implementation manner, the method for hoisting the tower barrel is:

[0031] The tower base platform installation: installing the tower base platform with the orientation of the tower barrel door perpendicular to the main wind direction, and sequentially installing each platform control cabinet;

[0032] The tower barrel damage detection: the main hoisting equipment and the auxiliary hoisting equipment hoist the tower barrel simultaneously, and after leaving the ground, check whether the paint on the contact surface between the tower barrel and the storage place is damaged. If it is damaged, repair the paint;

[0033] The tower barrel hoisting preparation: the main hoisting equipment and the auxiliary hoisting equipment cooperate to turn the tower barrel over and slowly place it on the sleeper, remove the lifting tool connected to the auxiliary hoisting on the lower flange of the tower barrel, and uniformly install guy ropes on the lower flange of the tower barrel;

[0034] The tower barrel fixed hoisting: hoist the tower barrel and move it above the tower base platform, and use the guy ropes to adjust the position of the tower barrel and place and fix it on the installation surface of the tower base platform.

[0035] Optionally, when the main hoisting equipment and the auxiliary hoisting equipment hoist the tower barrel simultaneously, the main hoisting equipment is connected to the upper flange at the top of the tower barrel, and the auxiliary hoisting equipment is connected to the lower flange at the bottom of the tower barrel.

[0036] In a possible implementation manner, the method for hoisting the nacelle is:

[0037] The nacelle hoisting preparation: installing the accessories on the top of the nacelle, passing the lifting tool through the hoisting hole on the top surface of the nacelle and fixedly connecting it to the internal hoisting rod of the nacelle, and respectively connecting guide ropes at the front and rear ends of the nacelle;

[0038] The nacelle fixed hoisting: the main hoisting equipment hoists the nacelle, moves it above the tower barrel, and uses the guide ropes to place and fix the nacelle yaw bearing on the installation surface of the upper flange of the tower barrel.

[0039] Optionally, before hoisting and fixing the nacelle, clean the installation surfaces of the yaw bearing and the tower flange with a cleaning agent.

[0040] In a possible implementation manner, the wind turbine installation method is as follows:

[0041] Wind turbine hoisting preparation: Rotate the blade edge to be parallel to the hub installation surface through pitch adjustment, install blade locks on the hub web, and install a traction sheath, guy ropes, a tailing sling, and a blade-shaped rigid guard plate on the blade;

[0042] Wind turbine tailing: The main hoisting equipment and the auxiliary hoisting equipment hoist the wind turbine simultaneously. The main hoisting equipment lifts the height of the wind turbine, and the auxiliary hoisting equipment pulls the blade to complete the tailing;

[0043] Wind turbine fixed hoisting: The main hoisting equipment lifts the height of the wind turbine, and aligns and fixedly installs the installation surface of the wind turbine with the installation surface of the nacelle in cooperation with the auxiliary hoisting equipment and the guy ropes.

[0044] Optionally, before the fixed hoisting of the wind turbine, clean the hub flange with a cleaning agent.

[0045] Optionally, during the wind turbine tailing, the main hoisting equipment is connected to the wind turbine hub, and the auxiliary hoisting equipment is connected to the blade below the connection point of the main hoisting equipment.

[0046] In a possible implementation manner, the traction sheath is connected to the hub through a nylon rope. The nylon rope is fixed inside the hub through the hoisting hole at the wind turbine spreader. The tailing sling passes through the handle of the guard plate, and both ends of the sheath fixing rope are firmly tied. / / Reduce the risk of the guard plate slipping and the sheath fixing rope falling off

[0047] In a possible implementation manner, after the front wind turbine is hoisted, it further includes: Installation of the drive chain coupling: Install the drive chain coupling on the drive chain inside the nacelle, between the front wind turbine and the generator.

[0048] In a possible implementation manner, the installation method of the drive chain coupling is as follows:

[0049] Inspection before installing the drive chain coupling: Check the distance between the end face of the brake disc of the front wind turbine gearbox and the installation surface of the generator coupling diaphragm, and check whether the inner ring of the expansion sleeve on the generator side completely covers the generator input shaft and whether there is no gap between the outer ring and the flange end face;

[0050] Installation of the drive chain coupling: Fix the drive chain coupling to the end faces of the brake disc of the front wind turbine gearbox and the installation surface of the generator coupling diaphragm.

[0051] Optionally, before installing the drive chain coupling, clean the end face of the brake disc of the front wind turbine gearbox and the installation surface of the generator coupling diaphragm.

[0052] In a possible implementation, after the installation of the drive chain coupling, it further includes: installing electrical components to connect the pitch systems inside the front and rear wind turbine hubs to the control system in the nacelle.

[0053] The beneficial effects of the technical solution provided by this application are as follows:

[0054] By adopting the tandem dual-rotor wind turbine and the hoisting method of this application, the following beneficial effects can be achieved: during the hoisting operation of the wind turbine, the construction operation area can be reduced by more than half, and the operation efficiency can be improved, reducing time and economic costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a schematic diagram of the overall structure of the tandem dual-rotor wind turbine of this application;

[0056] Figure 2 It is a schematic diagram of the connection structure between the nacelle and the top surface of the tower of the tandem dual-rotor wind turbine of this application;

[0057] Figure 3 It is a schematic diagram of the structure of the front rotor of the tandem dual-rotor wind turbine of this application;

[0058] Figure 4 It is a schematic diagram of the structure of the rear rotor of the tandem dual-rotor wind turbine of this application;

[0059] Figure 5 It is a schematic diagram of the structure of the main shaft of the basic installation surface of the tandem dual-rotor wind turbine of this application;

[0060] Figure 6 It is a schematic diagram of the connection relationship of the drive chain coupling of the tandem dual-rotor wind turbine of this application;

[0061] Figure 7 It is a flowchart of the installation method of the tandem dual-rotor wind turbine of this application;

[0062] Figure 8 It is a general flowchart of the installation method of the tandem dual-rotor wind turbine of this application;

[0063] Figure 9 It is a detailed flowchart of the tower hoisting of the tandem dual-rotor wind turbine of this application;

[0064] Figure 10 It is a detailed flowchart of the nacelle hoisting of the tandem dual-rotor wind turbine of this application;

[0065] Figure 11 It is a detailed flowchart of the rotor installation method of the tandem dual-rotor wind turbine of this application;

[0066] Figure 12This is a detailed flowchart for the installation of the drive chain coupling of the tandem dual-rotor wind turbine in this application;

[0067] Figure 13 This is a schematic structural diagram for calculating the hoisting height of the tandem dual-rotor wind turbine in this application;

[0068] Figure 14 This is a working schematic diagram when the nacelle of the tandem dual-rotor wind turbine yaws;

[0069] Figure 15 This is a schematic structural diagram for the preparation of the rotor hoisting of the tandem dual-rotor wind turbine in this application;

[0070] Figure 16 This is a working schematic diagram for the fixed hoisting of the rotor of the tandem dual-rotor wind turbine in this application.

[0071] Reference numerals: 1 - tower barrel; 2 - nacelle, 21 - bearing, 22 - bolt, 23 - main shaft, 231 - zero position mark; 3 - front rotor, 31 - braking disc end face of the front rotor gearbox; 4 - rear rotor; 5 - drive chain coupling; 6 - coupling diaphragm of the generator. Detailed implementation manners

[0072] To make the objectives, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below with reference to the accompanying drawings in this application. Obviously, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments in this application belong to the scope of protection of this application.

[0073] In the description of this application, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "aligned", "overlapped", "bottom", "inner", "outer", etc. are the orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to this application.

[0074] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features; in the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0075] Embodiment 1

[0076] Figures 1-6 This is a schematic structural diagram of a tandem dual-rotor wind turbine provided by an embodiment of the present application. As Figures 1-6 shown, an embodiment of the present application provides a tandem dual-rotor wind turbine, including: a tower barrel 1, a nacelle 2, a front rotor 3, a rear rotor 4, and a drive chain coupling 5;

[0077] The tower barrel 1 is fixedly connected to the tower base platform and is used for erecting the nacelle 2;

[0078] The nacelle 2 is erected on the tower barrel 1. The center points of the top surface of the tower barrel 1 and the bottom surface of the nacelle 2 are fixedly connected. Both the front and rear ends of the nacelle 2 have mounting surfaces for connecting the rotors;

[0079] The front rotor 3 is rotationally connected to the front end of the nacelle 2 through a hub;

[0080] The rear rotor 4 is rotationally connected to the rear end of the nacelle 2 through a hub;

[0081] The drive chain coupling 5 is arranged between the gearbox of the front rotor 3 and the generator. One end is fixedly connected to the end face 31 of the brake disc of the gearbox of the front rotor 3, and the other end is fixedly connected to the mounting surface of the coupling diaphragm 6 of the generator.

[0082] Optionally, the blades of the front rotor 3 and the rear rotor 4 have tail-sliding hoisting point marks.

[0083] In a possible implementation manner, the tower barrel 1 is divided into three sections, and each section of the tower barrel is fixedly connected through a flange sealed with sealant.

[0084] In a possible implementation manner, the top cover of the nacelle 2 has a lightning rod, a safety guardrail, a meteorological mast, and a radiator rain cover.

[0085] In a possible implementation manner, the top cover of the nacelle 2 also has a hoisting hole and a hoisting hole cover.

[0086] In a possible implementation manner, the front mounting surface of the nacelle 2 has a first mounting mark; the rear mounting surface of the nacelle 2 has a second mounting mark.

[0087] In a possible implementation manner, the hub of the front rotor 3 has a first corresponding mounting mark corresponding to the first mounting mark, and the hub of the rear rotor 4 has a second corresponding mounting mark corresponding to the second mounting mark.

[0088] In a possible implementation manner, the connecting surface of the hub of the front rotor 3 and the main shaft of the front mounting surface of the nacelle 2 have a zero position mark; the connecting surface of the hub of the rear rotor 4 and the main shaft of the rear mounting surface of the nacelle 2 also have a zero position mark.

[0089] In a possible implementation, the tandem dual-rotor wind turbine generator set further has electrical components; the electrical components are used to connect the pitch control system inside the front rotor and the internal control system of the nacelle, and are also used to connect the pitch control system inside the rear rotor hub and the internal control system of the nacelle.

[0090] In a possible implementation, the tower barrel 1 is fixedly connected to the tower base platform by a flange sealed with sealant.

[0091] In a possible implementation, the tower barrel 1 and the nacelle 2 are fixedly connected by bolts 22 passing through the inner ring of the shaft 21.

[0092] The technical effects of this embodiment are as follows:

[0093] The embodiment of the present application provides a tandem dual-rotor wind turbine generator set, which can effectively capture wind energy and improve the installation efficiency of the tandem dual-rotor wind turbine generator set.

[0094] Embodiment 2

[0095] As Figures 7-16 shown, the embodiment of the present application further provides a hoisting method for a tandem dual-rotor wind turbine generator set, including:

[0096] S201 Hoisting the tower barrel, fixedly installing the tower barrel on the tower base platform;

[0097] S301 Hoisting the nacelle, fixedly installing the nacelle on the top surface of the tower barrel;

[0098] S401 Hoisting the rear rotor, fixedly installing the rear rotor at the rear end of the nacelle by using a rotor installation method;

[0099] S501 Nacelle yawing, after the rear rotor hoisting is completed, rotating the boom of the main hoisting equipment by 180°, then moving a preset distance in the direction away from the tower barrel, and finally pitching the blades of the rear rotor to the edge forward and performing 180-degree yawing;

[0100] S601 Hoisting the front rotor, fixedly installing the front rotor at the front end of the nacelle by using a rotor installation method.

[0101] Optionally, when the nacelle is yawed, all items within the yaw radius of the fan with the impeller are cleared, and the calculation method of the preset distance is: the distance between the blade and the boom of the main hoisting equipment when the boom of the main hoisting equipment rotates 180 degrees and the nacelle yaws 180 degrees, minus the working radius of the main hoisting equipment.

[0102] For example, when the boom of the main hoisting equipment rotates 180 degrees and the nacelle yaws 180 degrees, the distance between the blade and the boom of the main hoisting equipment and other objects is about 25.043 meters. The operating radius of the main hoisting equipment is 20 meters, and the blade will interfere and collide with the boom of the main hoisting equipment and other objects. To avoid the collision between the blade and the boom of the main hoisting equipment and other objects during the yawing of the unit, before the wind turbine yaws, the boom of the crane needs to rotate 180°, and then drive outwards by no less than 5.5 meters. There will be no interference during yawing, as Figure 14 shown.

[0103] In a possible implementation manner, before the S201 tower barrel hoisting, it further includes: S101 hoisting preparation, and selecting a suitable hoisting equipment according to the actual weight and hoisting height requirements of the components of the dual-rotor wind power generation unit.

[0104] Optionally, the method for selecting a suitable hoisting equipment is to select a suitable hoisting equipment according to the weight, size and hoisting height requirements of the nacelle, hub, rear rotor system, front rotor system, and tower barrel.

[0105] For example, the components of the dual-rotor wind power generation unit shown in the following table:

[0106]

[0107] Calculate the hoisting height requirements of the equipment, as shown in Figure 13:

[0108] The weight of the nacelle in the hoisting state is about 150t, and the hoisting height H > X + 10m;

[0109] The weight of the rotor in the hoisting state is 38.4t, and the hoisting height requirement is H > X + 6m;

[0110] The weight of the top section of the tower barrel in the hoisting state is 103t, and the hoisting height H > X + 10m;

[0111] Among them, X is the height difference between the center of the wind turbine hub and the natural ground plane;

[0112] According to the above equipment and hoisting height factors, 1 XCMG XGC11000 / 650t crawler crane is used as the main hoisting equipment, and 1 QZ130K / 130t truck crane and 1 QZ85KC / 85t truck crane are used as the auxiliary hoisting equipment.

[0113] In a possible implementation manner, as Figure 9 shown, the method for hoisting the tower barrel is:

[0114] S211 tower base platform installation, install the tower base platform with the orientation of the tower barrel door perpendicular to the main wind direction, and install each platform control cabinet in sequence;

[0115] S221 Tower barrel damage detection: The main lifting equipment and the auxiliary lifting equipment lift the tower barrel simultaneously. After lifting off the ground, check whether the paint on the contact surface between the tower barrel and the storage place is damaged. If damaged, touch up the paint.

[0116] S231 Tower barrel hoisting preparation: The main lifting equipment and the auxiliary lifting equipment cooperate to turn the tower barrel over to the vertical position and slowly place it on the sleeper. Remove the lifting tool connecting the auxiliary lifting on the lower flange of the tower barrel, and evenly install guy ropes on the lower flange of the tower barrel.

[0117] S241 Tower barrel fixed hoisting: Lift the tower barrel and move it above the tower base platform. Use the guy ropes to adjust the position of the tower barrel and place and fix it on the installation surface of the tower base platform.

[0118] Optionally, the tower barrel is a three-section tower barrel.

[0119] Optionally, when the main lifting equipment and the auxiliary lifting equipment lift the tower barrel simultaneously, the main lifting equipment is connected to the upper flange at the top of the tower barrel, and the auxiliary lifting equipment is connected to the lower flange at the bottom of the tower barrel.

[0120] Optionally, each platform control cabinet includes: an inverter, a pump station cabinet, and a tower base control cabinet.

[0121] Optionally, before the S241 tower barrel fixed hoisting step, apply 1587 sealant on the upper surface of the anchor plate or the upper surface of the butt flange. The sealant should be evenly applied with a diameter of about Φ3 - 5mm, applied to form a ring, and the fixed installation of the tower barrel and the tower base platform should be completed within 20 minutes after application.

[0122] In a possible implementation manner, as Figure 10 shown, the method for hoisting the nacelle is as follows:

[0123] S311 Nacelle hoisting preparation: Install the accessories on the top of the nacelle, pass the lifting tool through the lifting hole on the top surface of the nacelle and fixedly connect it to the internal lifting rod of the nacelle, and connect guide ropes at the front and rear ends of the nacelle respectively.

[0124] S321 Nacelle fixed hoisting: The main lifting equipment lifts the nacelle, moves it above the tower barrel, and uses the guide ropes to place and fixedly install the yaw bearing of the nacelle on the installation surface of the upper flange of the tower barrel.

[0125] Optionally, before the fixed hoisting of the nacelle, clean the installation surfaces of the yaw bearing and the tower barrel flange with a cleaning agent.

[0126] In a possible implementation manner, as Figure 11 shown, the method for installing the wind turbine rotor is as follows:

[0127] S411 Wind turbine hoisting preparation. Rotate the blade edge to be parallel to the hub mounting surface through pitch adjustment. Install blade locks on the hub web, and install a traction sheath, guy ropes, a tailing sling, and a blade-shaped rigid guard on the blade, as Figure 15 shown;

[0128] S421 Wind turbine tailing. The main hoisting equipment and the auxiliary hoisting equipment hoist the wind turbine simultaneously. The main hoisting equipment lifts the height of the wind turbine, and the auxiliary hoisting equipment pulls the blade to complete the tailing;

[0129] S431 Fixed hoisting of the wind turbine. The main hoisting equipment lifts the height of the wind turbine, and cooperates with the auxiliary hoisting equipment and guy ropes to align and fixedly install the mounting surface of the wind turbine with the mounting surface of the nacelle, as Figure 16 shown.

[0130] Optionally, before the S431 fixed hoisting of the wind turbine, clean the hub flange with a cleaning agent.

[0131] Optionally, during S421 wind turbine tailing, the main hoisting equipment is connected to the wind turbine hub, and the auxiliary hoisting equipment is connected to the blade below the connection point of the main hoisting equipment.

[0132] Optionally, the front mounting surface of the nacelle has a first mounting mark; the rear mounting surface of the nacelle has a second mounting mark; the hub of the front wind turbine has a first corresponding mounting mark corresponding to the first mounting mark, and the hub of the rear wind turbine has a second corresponding mounting mark corresponding to the second mounting mark. Ensure that the marks are consistent during installation.

[0133] Optionally, the main shaft of the nacelle mounting surface has a zero position mark. During the S431 fixed hoisting of the wind turbine, rotate the zero position mark of the main shaft of the nacelle mounting surface to the due north, use a marker pen to lead the zero position mark to a position convenient for observation, and adjust the main shaft by turning the shaft to ensure that the zero position mark of the main shaft is aligned with the zero position mark of the impeller.

[0134] In a possible implementation manner, the traction sheath is connected to the hub through a nylon rope. The nylon rope is fixed inside the hub through the hoisting hole at the wind turbine spreader. The tailing sling passes through the guard handle, and both ends of the sheath fixing rope are firmly tied. Adopting this implementation manner can reduce the risk of the guard slipping and the sheath fixing rope falling off.

[0135] Optionally, the blade of the wind turbine has a tailing lifting point mark, and the auxiliary hoisting equipment is hoisted at the tailing lifting point mark.

[0136] In a possible implementation manner, after the S601 front wind turbine hoisting, it further includes: S701 Installation of the drive chain coupling. Install the drive chain coupling on the drive chain inside the nacelle, between the front wind turbine and the generator.

[0137] In a possible implementation manner, as Figure 12As shown, the installation method of the drive chain coupling is as follows:

[0138] Before installing the S711 drive chain coupling, check the distance between the end face of the brake disc of the front wind turbine gearbox and the installation surface of the generator coupling diaphragm, and check whether the inner ring of the expansion sleeve on the generator side completely covers the generator input shaft and whether there is no gap between the outer ring and the end face of the flange.

[0139] Install the S721 drive chain coupling and fixedly connect the drive chain coupling, the end face of the brake disc of the front wind turbine gearbox, and the installation surface of the generator coupling diaphragm.

[0140] Optionally, before installing the drive chain coupling, clean the end face of the brake disc of the front wind turbine gearbox and the installation surface of the generator coupling diaphragm.

[0141] In a possible implementation, after installing the drive chain coupling, it further includes: S801 Install electrical components and connect the pitch system inside the front and rear wind turbine hubs to the control system in the nacelle.

[0142] The technical effects of this embodiment are as follows:

[0143] According to the equipment parameters of the dual-wind turbine wind power generation unit, this embodiment optimizes the lifting equipment and the installation process and flow, which can not only meet the needs of equipment installation, but also reduce the floor area, labor, equipment, and time costs to a certain extent. And it can effectively prevent the equipment from colliding with the crane boom, which can not only meet the requirements of lifting height and lifting capacity, improve the construction efficiency and safety factor, speed up the construction progress, but also greatly reduce the construction cost.

[0144] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. The present application is not limited to the exact structures described above and illustrated in the drawings, and it cannot be considered that the specific implementation of the present application is only limited to these descriptions. For those of ordinary skill in the technical field to which the present application belongs, various changes and deformations made without departing from the concept of the present application should be regarded as belonging to the protection scope of the present application.

Claims

1. A hoisting method for a tandem dual-rotor wind turbine, characterized in that include: Tower hoisting, fixing the tower on the tower base platform; Nacelle hoisting, fix the nacelle on the top of the tower; The rear wind wheel is hoisted and fixedly installed at the rear end of the nacelle using the wind wheel installation method; Yaw of the nacelle: after the rear wind rotor is hoisted, rotate the main hoisting equipment arm 180°, then move it away from the tower by a preset distance, and finally change the pitch of the rear wind rotor blades so that the blades face forward and yaw 180 degrees; The front wind wheel is hoisted and fixedly installed at the front end of the nacelle using the wind wheel installation method; The tower hoisting method is: Tower base platform installation: Install the tower base platform with the tower door facing perpendicular to the main wind direction, and install the control cabinets of each platform in sequence; Tower damage detection: The main hoist and auxiliary hoist lift the tower at the same time. After it leaves the ground, check whether the paint on the contact surface between the tower and the storage area is damaged. If there is any damage, repaint it. Preparation for tower hoisting: The main hoisting equipment cooperates with the auxiliary hoisting equipment to turn the tower vertically and slowly place it on the sleepers. Remove the hoisting equipment connected to the auxiliary hoist on the lower flange of the tower, and evenly install the guy ropes on the lower flange of the tower. Tower fixed hoisting: lift the tower and move it above the tower base platform, use the guy rope to adjust the tower position, place the tower in line with the installation surface of the tower base platform and fix it; The wind wheel installation method is as follows: Preparation for wind rotor hoisting: turn the blade edge to be parallel to the hub mounting surface through pitch control, install the blade lock on the hub web, and install the traction sheath, wind rope, tail sling and blade-shaped hard guard on the blade; Wind rotor tail slide: The main hoisting equipment and the auxiliary hoisting equipment lift the wind rotor at the same time. The main hoisting equipment raises the height of the wind rotor, and the auxiliary hoisting equipment pulls the blades to complete the tail slide; Fixed hoisting of the wind rotor: The main hoisting equipment lifts the height of the wind rotor, and cooperates with the auxiliary hoisting equipment and the wind rope to align the installation surface of the wind rotor with the installation surface of the nacelle and fix it.

2. The hoisting method of the tandem dual-rotor wind turbine unit according to claim 1, wherein, Before the tower is hoisted, the method further includes: Preparation for lifting: select appropriate lifting equipment based on the actual weight and lifting height requirements of the twin-rotor wind turbine components.

3. The hoisting method of the tandem dual-rotor wind turbine according to claim 1, wherein The method for hoisting the nacelle is as follows: Preparation for cabin hoisting: Install the accessories on the top of the cabin, pass the hoisting device through the hoisting hole on the top of the cabin and fix it to the hoisting rod inside the cabin, and connect the guide ropes at the front and rear ends of the cabin respectively; Fixed hoisting of the nacelle: The main hoisting equipment lifts the nacelle and moves it above the tower. The guide rope is used to place the nacelle yaw bearing against the flange mounting surface on the tower and fix it in place.

4. The hoisting method of the tandem dual-rotor wind turbine unit according to claim 1, characterized in that The traction sheath is connected to the hub through a nylon rope, the nylon rope is fixed in the hub through a hoisting hole at the wind wheel hoist, the tail sling passes through the guard plate handle, and both ends of the sheath fixing rope are tied firmly.

5. The hoisting method of the tandem dual-rotor wind turbine according to claim 1, characterized in that After the front wind wheel is hoisted, the method further comprises: Drive chain coupling installation: Install the drive chain coupling on the drive chain inside the nacelle, between the front wind wheel and the generator.

6. The hoisting method of the tandem dual-rotor wind turbine according to claim 5, characterized in that, The installation method of the transmission chain coupling is as follows: Check the transmission chain coupling before installation: Check the distance between the end face of the brake disc of the front wind wheel gearbox and the installation surface of the diaphragm of the generator coupling, and check whether the inner ring of the expansion sleeve on the generator side completely covers the generator input shaft, and whether there is no gap between the outer ring and the end face of the flange; Drive chain coupling installation: Fix the drive chain coupling and the front wind wheel gearbox brake disc end face to the generator coupling diaphragm mounting surface.

7. The hoisting method of the tandem dual-rotor wind turbine according to claim 1, characterized in that After the installation of the drive chain coupling, it also includes: the installation of electrical components, connecting the pitch systems inside the front and rear wind turbine hubs to the control system in the nacelle.

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