CN113443544A

CN113443544A - Auxiliary device and method for hoisting impeller

Info

Publication number: CN113443544A
Application number: CN202010218510.1A
Authority: CN
Inventors: 张新旺
Original assignee: Urumqi Jinfeng Tianyi Wind Power Co ltd
Current assignee: Urumqi Jinfeng Tianyi Wind Power Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2021-09-28

Abstract

The embodiment of the invention provides an auxiliary device and a method for hoisting an impeller, wherein the auxiliary device is used for adjusting the balance of a hoisted object and comprises the following components: the bearing rod is used for connecting a hung object; the connecting arm is connected with the bearing rod and is rotatably arranged around the bearing rod, so that the included angle between the connecting arm and the bearing rod is adjustable; wherein, still be provided with the counter weight subassembly on the connecting arm to make and can change the relative position of counter weight subassembly and quilt thing through adjusting the contained angle between connecting arm and the carrier bar. When the auxiliary device provided by the embodiment of the invention is arranged on a hung object, the position between the hung object and the counterweight component can be changed by adjusting the included angle between the connecting arm and the bearing rod, so that the balance of the hung object is ensured.

Description

Auxiliary device and method for hoisting impeller

Technical Field

The invention relates to the technical field of hoisting equipment, in particular to an auxiliary device and a method for hoisting an impeller.

Background

Wind power is used as an environment-friendly industry, and energy conservation and environmental protection are one of main value incarnations of the wind power industry. The installation of a wind generating set in the construction process of a wind power plant is a key construction link.

The direct-drive unit is continuously developed to be large-scale, large components are continuously increased along with the increase of the capacity of a single machine, if the height of a tower barrel is increased, blades are increased, the diameter of an impeller is correspondingly increased greatly, and the problem that the site area is limited is brought to unit installation. At present, the geographic environment of a wind power plant is more and more complex and diversified, a plurality of electric fields are located in mountainous areas, hills or sea, and the wind turbines are installed in a small area. Such as on a narrow crest, a steep hill or a crane ship deck, so that installation is very difficult. If the traditional impeller hoisting method is still used, the construction efficiency is low, and some machine positions cannot meet the requirement of hoisting the impeller. Some impellers are far larger than the field in diameter, the impellers cannot be assembled on the ground at all, and blades need to be hung on the impellers on the field. But the balance of impeller can not be realized when the blade hoists on the impeller to present hoist device assurance, and the too big brake of impeller load can not be fixed in predetermineeing the position, consequently can not realize the horizontal hoist and mount of blade.

Therefore, a new auxiliary device and a method for hoisting the impeller are needed.

Disclosure of Invention

The embodiment of the invention provides an auxiliary device and a method for hoisting an impeller, and aims to solve the problem of balance of a hoisted object in a hoisting process.

In one aspect, an embodiment of the present invention provides an auxiliary device for hoisting a hoisted object, where the auxiliary device includes: the bearing rod is used for connecting a hung object; the connecting arm is connected with the bearing rod and is rotatably arranged around the bearing rod, so that the included angle between the connecting arm and the bearing rod is adjustable; wherein, still be provided with the counter weight subassembly on the connecting arm to make and can change the relative position of counter weight subassembly and quilt thing through adjusting the contained angle between connecting arm and the carrier bar.

According to an embodiment of an aspect of the invention, the extension length of the connecting arm is adjustable, so that the relative position of the weight assembly and the load carrying bar in the extension direction of the connecting arm is adjustable.

According to one aspect of the present invention, in any one of the embodiments described above, the connecting arm includes two or more connecting rods connected to each other, and one of the two connecting rods is provided with a guide cylinder formed to extend in the extending direction, and the other connecting rod is movably provided in the guide cylinder in the extending direction.

According to an aspect of the invention in any of the previous embodiments, further comprising a first sensor for acquiring the extension length of the connection arm.

According to one aspect of the present invention, in any of the embodiments described above, the remote controller is further configured to adjust an angle between the connecting arm and the carrying rod, and/or the remote controller is configured to adjust an extension length of the connecting arm.

According to one aspect of the present invention, in any one of the embodiments described above, the weight assembly is movably arranged along the extending direction of the connecting arm, so that the relative positions of the weight assembly and the load bearing rod in the extending direction of the connecting arm are adjustable.

According to one aspect of the present invention, in any one of the embodiments, the telescopic rod further comprises a telescopic rod, one end of the telescopic rod is connected to the carrying rod, the other end of the telescopic rod is connected to the connecting arm, and the length of the telescopic rod is adjustable, so that the included angle between the carrying rod and the connecting arm can be adjusted through the telescopic rod.

According to an aspect of the present invention, in any of the preceding embodiments, further comprising:

the angle sensor is used for acquiring an included angle between the bearing rod and the connecting arm;

and/or, a distance sensor for acquiring the length of the telescopic rod;

and/or a weight scale for acquiring the weight of the weight assembly.

According to one aspect of the invention, in any one of the embodiments described above, the connecting arm is further provided with a lifting lug for lifting, and the counterweight assembly is located on a side of the lifting lug facing away from the carrier bar.

In another aspect, an embodiment of the present invention further provides a method for hoisting an impeller by using the above-mentioned auxiliary device, where the impeller includes a hub and blades, the hub includes mounting holes for connecting the blades, and the method includes:

connecting the carrier bar to the hub;

installing the blade in the mounting hole;

wherein, still include before installing each blade in the mounting hole: and adjusting the relative positions of the counterweight component and the hub, and enabling the mounting hole corresponding to the blade to face the preset direction.

According to another aspect of the present invention, the connecting arm is adjustable in length, and adjusting the relative positions of the weight assembly and the hub comprises:

the relative position of the counterweight component and the hub is adjusted by adjusting the included angle between the bearing rod and the connecting arm;

and/or adjusting the relative position of the weight assembly and the hub by adjusting the length of the connecting arm.

According to another aspect of the present invention, in any of the preceding embodiments, the hub includes two or more mounting holes, and the connecting the load bar to the hub includes: connecting the bearing rod to the variable-pitch bearing in one of the mounting holes;

adjusting the relative position of the weight assembly and the hub includes:

and/or adjusting the relative position of the counterweight assembly and the hub by rotating the pitch bearing.

According to another aspect of the present invention in any of the preceding embodiments, the position of the weight assembly on the connecting arm is adjustable, and adjusting the relative position of the weight assembly and the hub comprises:

and/or adjusting the relative position of the weight assembly and the hub by adjusting the relative position of the weight assembly and the connecting arm.

According to another aspect of the present invention, in any one of the preceding embodiments, the number of the blades is two or more, the two or more blades include a first blade and a second blade which are sequentially mounted on the hub, the number of the mounting holes is two or more, and the two or more mounting holes include a first mounting hole for mounting the first blade and a second mounting hole for mounting the second blade;

installing the blade in the mounting hole further includes: mounting the first blade to the first mounting hole;

adjust the relative position of counter weight subassembly and wheel hub to the installation hole orientation that makes and correspond with the blade includes in the preset direction: adjusting the relative positions of the counterweight component and the hub, and enabling the counterweight component and the first mounting hole to face a preset direction;

before the first blade is installed in the first installation hole, the method further comprises the following steps: and mounting the hub on a tower of the wind generating set.

According to another aspect of the invention, in any of the previous embodiments, the hub is mounted on the tower of the wind turbine before the relative positions of the counterweight assembly and the hub are adjusted and the first mounting hole is oriented in the preset direction;

or before the hub is installed on the tower of the wind generating set, the relative positions of the counterweight component and the hub are adjusted, and the first installation hole is made to face the preset direction.

According to another aspect of the present invention, in any of the preceding embodiments, the mounting the blade to the mounting hole further comprises: mounting the second blade to the second mounting hole;

before installing the second blade in the second mounting hole, adjust the relative position of counter weight subassembly and wheel hub to make the mounting hole that corresponds with the blade still include towards preset direction:

adjusting the relative positions of the counterweight assembly and the hub so that the difference between a first rotating torque applied to the hub by the auxiliary device and a second rotating torque applied to the hub by the first blade is within a preset difference range;

and rotating the hub to enable the second mounting hole to face the preset direction.

According to another aspect of the present invention, in any of the embodiments described above, after rotating the hub to face the predetermined direction with the second mounting hole, the method further includes:

and adjusting the relative positions of the counterweight assembly and the hub so that the gravity center of the counterweight assembly and the suspension point of the hub are distributed along the vertical direction.

According to another aspect of the present invention, in any of the previous embodiments, the two or more blades further include a third blade, the hub further includes a third mounting hole for mounting the third blade, and the carrier bar is connected to the third mounting hole;

installing the blade in the mounting hole further includes: mounting the third blade in the third mounting hole;

before installing the third blade in the third mounting hole, adjust the relative position of counter weight subassembly and wheel hub to the mounting hole that makes and correspond with the blade still includes towards preset direction:

and adjusting the relative positions of the counterweight component and the hub, so that the gravity of the auxiliary device is used as at least part of driving force for driving the hub to rotate, the hub is rotated, and the third mounting hole faces to the preset direction.

In the auxiliary device provided by the embodiment of the invention, the auxiliary device comprises the bearing rod and the connecting arm, and the included angle between the bearing rod and the connecting arm is adjustable. The connecting arm is provided with a counterweight component. When the connecting arm rotates relative to the bearing rod to adjust the included angle of the connecting arm, the relative position between the counterweight component and the hung object can be adjusted. Therefore, when the auxiliary device provided by the embodiment of the invention is arranged on the hoisted object, the position between the hoisted object and the counterweight component can be changed by adjusting the included angle between the connecting arm and the bearing rod, so that the balance of the hoisted object is ensured.

Drawings

Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings in which like or similar reference characters refer to the same or similar parts.

FIG. 1 is a structural illustration of a wind turbine generator system;

FIG. 2 is a schematic view of a method for hoisting an impeller of a wind turbine generator system;

FIG. 3 is a schematic diagram of a single blade inclined insertion hoisting method;

FIG. 4 is a schematic view of a blade form in a single blade inclined insertion hoisting method;

FIG. 5 is a schematic view of a blade form in a horizontal single-blade hoisting method;

FIG. 6 is a schematic structural diagram of an auxiliary device according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an auxiliary device in another state according to an embodiment of the present invention;

fig. 8 is a process thumbnail of a usage method of an auxiliary device according to another embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an auxiliary device in a first state according to another embodiment of the present invention;

FIG. 10 is a structural diagram of an auxiliary device in a second state according to another embodiment of the present invention;

FIG. 11 is a structural diagram of an auxiliary device in a third state according to a method for using the auxiliary device in accordance with another embodiment of the present invention;

FIG. 12 is a structural diagram of an auxiliary device in a fourth state according to a method for using the auxiliary device in accordance with another embodiment of the present invention;

FIG. 13 is a structural diagram of an auxiliary device in a fifth state according to another embodiment of the present invention;

FIG. 14 is a structural diagram of an auxiliary device in a sixth state according to a method for using the auxiliary device in accordance with another embodiment of the present invention;

FIG. 15 is a schematic structural diagram of an auxiliary device in a seventh state according to a method for using the auxiliary device of the present invention;

fig. 16 is a structural diagram illustrating an eighth state of the auxiliary device in a method for using the auxiliary device according to another embodiment of the present invention;

FIG. 17 is a structural diagram of an auxiliary device in a ninth state according to another embodiment of the present invention;

fig. 18 is a schematic structural diagram of an auxiliary device in a tenth state in a using method of the auxiliary device according to another embodiment of the invention;

fig. 19 is a schematic structural diagram of an auxiliary device in an eleventh state in a using method of the auxiliary device according to another embodiment of the invention;

FIG. 20 is a structural diagram of an auxiliary device in a twelfth state according to a method for using the auxiliary device of the present invention;

FIG. 21 is a structural diagram of an auxiliary device in a thirteenth state according to a method for using the auxiliary device in accordance with another embodiment of the present invention;

fig. 22 is a flowchart of a method for using an auxiliary device according to another embodiment of the present invention.

Description of reference numerals:

100. an auxiliary device; 110. a carrier bar; 111. a connecting plate; 120. a connecting arm; 121. a connecting rod; 121a, a first link; 121b, a second link; 121c, a third link; 122. a hydraulic cylinder; 130. a counterweight assembly; 131. a balancing weight; 140. lifting lugs; 141. a first segment; 142. second slicing; 143. a boom; 150. a remote controller; 160. a telescopic rod;

200. a hub; 210. mounting holes; 211. a first mounting hole; 212. a second mounting hole; 213. a third mounting hole; 220. a pitch bearing;

300. a blade; 310. a first blade; 320. a second blade; 330. a third blade;

400. a tower.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated for convenience in describing the invention and to simplify description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The directional terms appearing in the following description are intended to be illustrative in all directions, and are not intended to limit the specific construction of embodiments of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

As shown in fig. 1, the wind turbine includes a tower 400 and an impeller mounted to the tower 400, the impeller including a hub 200 and blades 300 mounted to the hub 200. The impeller is typically mounted to the formed tower 400 by a hoisting process.

As shown in fig. 2 to 5, the hub 200 comprises mounting holes 210 for mounting the blades 300, and a pitch bearing 220 is arranged in the mounting holes 210. The number of blades 300 is typically two or more. For example, the number of the blades 300 is three, the three blades 300 are respectively a first blade 310, a second blade 320 and a third blade 330, the hub 200 has three mounting holes 210, and the three mounting holes 210 are respectively a first mounting hole 211 for mounting the first blade 310, a second mounting hole 212 for mounting the second blade 320 and a third mounting hole 213 for mounting the third blade 330. It is understood that there may be two blades 300, two corresponding mounting holes 210, four or more blades 300, and four or more corresponding mounting holes 210.

The wind generating set is continuously enlarged, and most parts are continuously enlarged along with the increase of the capacity of a single machine. If the height of the tower 400 is increased, the length of the blade 300 is increased, and the diameter of the hub 200 is also increased greatly, which causes a problem of limited site area for unit installation. At present, the geographic environment of wind power plants is more and more complex and diversified, a plurality of electric fields are located in mountainous areas, hills or sea, and the wind generating sets of the wind power plants are very difficult to install due to the small area of the field, such as on a narrow mountain top, a steep mountain slope or a deck of a crane ship.

In the conventional method for lifting the blades 300, as shown in fig. 2, after all the blades 300 are mounted on the hub 200 to form an impeller, the impeller is lifted on the tower 400. The impeller hoisting method has low construction efficiency, and some machine positions can not meet the requirement of hoisting the impeller.

Therefore, the wind turbine generator set is usually hoisted by using a single-blade hoisting method, i.e., the hub 200 is hoisted on the tower 400 first, and then the single blade 300 is hoisted on the hub 200. At present, two methods, namely single-blade horizontal sheet hoisting and single-blade inclined insertion hoisting, are mainly adopted for hoisting single blades in the wind power industry.

The single-blade inclined-insertion hoisting method is that, as shown in fig. 3, after the hub 200 is hoisted on the tower 400, the hub 200 is always in a locked state, the hub 200 does not rotate, and three blades 300 are respectively installed with a certain angle. As shown in fig. 4, in the process of the single blade inclined insertion hoisting method, an included angle exists between the axis of the blade 300 and the horizontal plane in the hoisting process, for example, an included angle of 30 ° is formed between the axis of the blade 300 and the horizontal plane. During hoisting, the first blade 310 and the hub 200 can be firstly combined into a whole and then hoisted and installed at the same time, or the hub 200 is firstly hoisted on the tower 400 and then the first blade 310 is vertically installed, the installation holes 210 corresponding to the second blade 320 and the third blade 330 form an angle of 30 degrees with the horizontal direction, the hub 200 is locked, and the second blade 320 and the third blade 330 are respectively installed at the angle of 30 degrees.

In the single-blade inclined-insertion hoisting method, the blades 300 are in an open-propeller state, the windward area is the largest, and therefore the influence of wind speed is large, and the construction risk is high. For example, when the wind speed is higher than 6m/s, the hoisting operation cannot be carried out, so the construction efficiency of the single-blade inclined-insertion hoisting method is low.

The blade 300 is hoisted with an included angle with the horizontal plane, so that the hoisting height is greater than the height of the hub 200, the corresponding requirement on a crane is high, the safety requirement on a hanger is very strict, the hoisting process and the hanger structure are complex, and the development design and the manufacturing cost are high. And due to the influence of the wing shape and structure of the blade 300, the lifting appliance cannot be applied to various blades 300, and has the defect of poor universality. The sling needs a larger clamping force in the single-blade inclined-insertion hoisting process, so that the friction force of the blade 300 and the clamp can offset the dead weight of the blade 300, namely, the sling can clamp the blade 300. For small-sized unit tower barrel with low height and light blade 300, the single-blade inclined-insertion hoisting method can be preferably selected. For a large wind generating set, such as a wind generating set with a single machine capacity of more than 3MW, the hub 200 of the wind generating set has a large diameter, the hub 200 has a high height, and the blades 300 have a heavy weight, so that the method is not suitable for use.

As shown in FIG. 5, FIG. 5 shows that the blade is always in the horizontal position in the horizontal hoisting process of the single blade, and the horizontal hoisting method of the single blade has no problems. However, the direct-drive wind generating set does not have a gear box, an internal turning device is not designed, turning capability is not available, and the hub 200 cannot be fixed at a preset position, so that the direct-drive wind generating set is always in heavy difficulty in realizing horizontal hoisting of a single blade.

The invention provides an auxiliary device 100 and a method for hoisting an impeller, which can fix a hub 200 of a direct-drive wind generating set at a preset position, thereby realizing various single-blade hoisting methods and solving the problems of the traditional hoisting method and the single-blade inclined-insertion hoisting method.

For better understanding of the present invention, the auxiliary device 100 and the method for using the same according to the embodiment of the present invention will be described in detail with reference to fig. 6 to 22.

Fig. 6 is a view illustrating an auxiliary device 100 according to an embodiment of the present invention, for hoisting an object to be hoisted, the auxiliary device 100 including: a load bar 110 for connecting a suspended object; the connecting arm 120 is connected to the carrying rod 110 and is rotatably arranged around the carrying rod 110, so that the included angle between the connecting arm 120 and the carrying rod 110 is adjustable; wherein, the connecting arm 120 is further provided with a counterweight assembly 130, so that the relative position of the counterweight assembly 130 and the hung object can be changed by adjusting the included angle between the connecting arm 120 and the carrying rod 110.

In the auxiliary device 100 of the embodiment of the invention, the auxiliary device 100 includes a carrying rod 110 and a connecting arm 120, and an included angle between the carrying rod 110 and the connecting arm 120 is adjustable. A weight assembly 130 is disposed on the connecting arm 120. When the connecting arm 120 rotates relative to the carrying rod 110 to adjust the included angle, the relative position between the counterweight assembly 130 and the hung object can be adjusted. Therefore, when the auxiliary device 100 of the embodiment of the invention is arranged on the hoisted object, the position between the hoisted object and the counterweight assembly 130 can be changed by adjusting the included angle between the connecting arm 120 and the carrying rod 110, so that the balance of the hoisted object is ensured.

For example, when the auxiliary device 100 is used and disposed on the hub 200, by changing the relative positions of the weight assembly 130 and the hub 200, the center of gravity of the auxiliary device 100, and thus the center of gravity of the hub 200 and the auxiliary device 100, can be changed such that the mounting hole 210 for mounting the blade 300 on the hub 200 is in a horizontal position. One of the blades 300 (e.g., the first blade 310) may be horizontally hoisted directly to the mounting hole 210 (e.g., the first mounting hole 211).

Then, by changing the relative positions of the weight assembly 130 and the hub 200, it is possible to adjust the magnitude between the rotational torque applied to the hub 200 by the auxiliary device 100 and the rotational torque applied to the hub 200 by the first blade 310, adjust the load of the hub 200, facilitate driving the hub 200 to rotate, and facilitate controlling the rotation speed of the hub 200 or fixing the hub 200 at a predetermined position. Rotation of the hub 200 means that the hub 200 rotates about a horizontal axis for changing the orientation of the mounting hole 210. After the first blade 310 is installed, the hub 200 is rotated to a position where the second installation hole 212 is horizontal, and the second blade 320 is hoisted. Therefore, the auxiliary device 100 of the embodiment of the invention can enable the installation hole 210 to be in a horizontal position, thereby facilitating the horizontal hoisting of the single blade.

In some alternative embodiments, the connecting arm 120 is provided with a lifting lug 140 for lifting, for example, and the counterweight assembly 130 is located on the side of the lifting lug 140 facing away from the carrier bar 110. The auxiliary device 100 can lift the lifted object, the auxiliary device 100 can simultaneously bear the effect of the lifting appliance, the lifting process can be simplified, and the lifting efficiency is improved.

The carrying rod 110 can be arranged in various ways, for example, the connecting end of the carrying rod 110 for connecting to the hoisted object is provided with a connecting plate 111, so that the carrying rod 110 can be connected to the pitch bearing 220 in the mounting hole 210 through the connecting plate 111. During the hoisting process, the auxiliary device 100 can be connected to the pitch bearing 220 in the mounting hole 210, and during the process of adjusting the relative position of the counterweight assembly 130 and the hub 200, the pitch bearing 200 can rotate to change the relative position between the auxiliary device 100 and the hub 200 and further change the relative position between the counterweight assembly 130 and the hub 200 by using the pitch bearing 220 as a rotary support of the auxiliary device 100.

There are various ways to adjust the included angle between the carrying rod 110 and the connecting arm 120, for example, the auxiliary device 100 further comprises a telescopic rod 160, one end of the telescopic rod 160 is connected to the carrying rod 110, the other end of the telescopic rod 160 is connected to the connecting arm 120, and the length of the telescopic rod 160 is adjustable, so that the included angle between the carrying rod 110 and the connecting arm 120 can be adjusted through the telescopic rod 160.

In these alternative embodiments, the angle between the load bar 110 and the connecting arm 120 can be adjusted by adjusting the length of the telescoping rod 160. The telescopic rod 160 is, for example, a hydraulic telescopic rod 160, that is, the telescopic rod 160 is driven to extend and retract by the hydraulic cylinder 122 to change the length of the telescopic rod 160. The arrangement of the telescopic rod 160 is not limited to this, and the length of the telescopic rod 160 can be controlled by other means, such as a motor, etc., as long as the length of the telescopic rod 160 is adjustable, and the included angle between the carrying rod 110 and the connecting arm 120 can be adjusted by adjusting the length of the telescopic rod 160.

In some alternative embodiments, the auxiliary device 100 further comprises an angle acquiring device (not shown) for acquiring the included angle between the carrying rod 110 and the connecting arm 120. The angle acquiring device is, for example, an angle sensor, and the angle sensor is used for acquiring the included angle between the carrying rod 110 and the connecting arm 120. Or, the angle acquiring device is a distance sensor, and the distance sensor is used for acquiring the length of the telescopic rod 160 so as to convert the included angle between the carrying rod 110 and the connecting arm 120 according to the length of the telescopic rod 160. The arrangement manner of the angle acquiring device is not limited to this, as long as the angle acquiring device can acquire the included angle between the carrying rod 110 and the connecting arm 120.

The length of the carrying rod 110 is adjustable, and the angle between the carrying rod 110 and the connecting arm 120 can also be adjusted by the cooperation of the carrying rod 110 and the telescopic rod 160. The relative position between the weight assembly 130 and the hoisted object can also be adjusted by adjusting the length of the load bar 110.

In some alternative embodiments, the extension length of the connecting arm 120 is adjustable, so that the relative positions of the weight assembly 130 and the load bar 110 in the direction of extension of the connecting arm 120 are adjustable. The extending direction of the connecting arm 120 is the length direction of the connecting arm 120. In these alternative embodiments, the distance between the counterweight assembly 130 and the suspended object can be adjusted by adjusting the length of the connecting arm 120.

Referring to fig. 7, in some alternative embodiments, the connecting arm 120 includes more than two connecting rods 121 connected to each other, one of the two connecting rods 121 is provided with a guiding cylinder extending along the extending direction of the connecting arm 120, and the other is movably disposed in the guiding cylinder along the extending direction of the connecting arm 120.

In these alternative embodiments, one of the links 121 connected to each other is provided with a guide cylinder, and the other is movably arranged in the guide cylinder, and by changing its position in the guide cylinder, the relative position between the two links 121, and thus the length of the connecting arm 120, can be changed. Simple structure and convenient operation.

As shown in fig. 7, the connecting arm 120 includes three links 121, namely a first link 121a, a second link 121b and a third link 121c, the first link 121a is provided with a guide cylinder, the second link 121b is movably disposed in the guide cylinder, the second link 121b is also provided with a guide cylinder, the third link 121c is movably disposed in the guide cylinder, and the length of the connecting arm 120 can be changed by changing the position of the second link 121b and/or the third link 121c in the guide cylinder. It is understood that the number of the links 121 may not be limited thereto, for example, there are only two links 121, or there are four or more links 121.

There are various ways in which the connecting rod 121 can be movably arranged in the guide cylinder, for example, a hydraulic cylinder 122 can be used to drive the connecting rod 121 to move in the guide cylinder. Referring to fig. 7, the first link 121a and the second link 121b are connected by a hydraulic cylinder 122, one end of the hydraulic cylinder 122 is fixed to the first link 121a, and the other end of the hydraulic cylinder 122 is fixed to the second link 121b, so that the second link 121b is driven to move in the guide cylinder by changing the length of the hydraulic cylinder 122.

It is understood that the manner of movably disposing the connecting rod 121 in the guiding cylinder is not limited thereto, and the connecting rod 121 may be driven by a motor to move in the guiding cylinder, as long as the connecting rod 121 can move in the guiding cylinder, so that the relative position of two adjacent connecting rods 121 is changed, and the length of the connecting arm 120 is changed.

In some alternative embodiments, the auxiliary device 100 further comprises a first sensor for acquiring the extension length of the connecting arm 120. The user can conveniently obtain the length of the connecting arm 120 in real time, and the relative position between the counterweight assembly 130 and the hoisted object can be calculated according to the length of the connecting arm 120.

There are various ways of arranging the first sensor, for example, a distance sensor, by which the length of the connecting arm 120 is measured in real time. Alternatively, when the two adjacent links 121 are connected by the hydraulic cylinder 122, the first sensor is provided in the hydraulic cylinder 122, and the relative position of the two adjacent links 121 is calculated by, for example, acquiring the oil amount of the hydraulic cylinder 122, thereby acquiring the length of the connecting arm 120. The arrangement of the first sensor is not limited to this, as long as the length of the connecting arm 120 can be acquired by the first sensor.

The shape of the connection arm 120 is not limited, and the connection arm 120 has, for example, a cylindrical shape or a prismatic shape. In some alternative embodiments, the connecting arm 120 has a quadrangular prism shape, for example, so that the lifting lug 140 can be attached to the outer surface of the connecting arm 120, the contact area between the lifting lug 140 and the connecting arm 120 is increased, and the stability of the relative positions of the lifting lug 140 and the connecting arm 120 is ensured.

When the connecting arm 120 includes two or more links 121, each link 121 has a quadrangular prism shape, for example.

The lifting lug 140 includes, for example, a first segment 141 and a second segment 142, and the first segment 141 and the second segment 142 are respectively disposed on two sides of the connecting arm 120, so as to further increase the contact area between the lifting lug 140 and the connecting arm 120, and improve the stability of the relative position between the lifting lug 140 and the connecting arm 120.

A hanger bar 143 is connected between the first and

second segments

141 and 142, so that the lifting device can lift the entire auxiliary device 100 by the hanger bar 143.

The counterweight assembly 130 includes, for example, a plurality of removable counterweights 131 for replacement, and the user can mount the counterweights 131 with appropriate weight and number on the connecting arm 120 according to the actual use requirement. When two or more weights 131 are connected to the connecting arm 120, the two or more weights 131 are respectively disposed on two sides of the connecting arm 120, for example, to improve the balance of the auxiliary device 100.

In some alternative embodiments, the weight assembly 130 is movably disposed along the extending direction of the connecting arm 120, and the relative positions of the weight assembly 130 and the load-bearing rod 110 in the extending direction of the connecting arm 120, and therefore the relative positions of the weight assembly 130 and the hoisted object, can be adjusted by moving the weight assembly 130. For example, the weight assembly 130 is connected to the connecting arm 120 using a pulley such that the weight assembly 130 is movable along the connecting arm 120.

In some alternative embodiments, the auxiliary device 100 further comprises a controller for adjusting the angle between the connecting arm 120 and the carrier bar 110, and/or for adjusting the extension length of the connecting arm 120. The controller is, for example, a remote controller 150, which facilitates the user to operate the auxiliary device 100 at different positions. The controller also has functions such as overspeed protection, limit protection, and overload protection of the auxiliary device 100, for example.

Referring to fig. 8 together, fig. 8 is a schematic diagram of a method for lifting an impeller by using the auxiliary device 100 according to the second embodiment of the present invention, that is, the structure of the components is simplified in fig. 8, and only the relative position relationship among the auxiliary device 100, the hub 200, the blade 300 and the tower 400 during the lifting process is shown. The first figure at the top left to the last figure at the bottom right in fig. 8 shows the process of using the auxiliary device to hoist the whole impeller.

As shown in fig. 8, the method for hoisting the impeller of the auxiliary device includes:

step S101: the carrier bar is connected to the hub.

In some alternative embodiments, as shown in FIG. 9, when the connecting plate 111 is provided on the load bar 110, the connecting plate 111 may be connected to the pitch bearing 220 in the mounting hole 210.

Step S104: the blade 300 is mounted to the mounting hole 210.

Wherein, prior to mounting each blade 300 to the mounting hole 210, the method further comprises:

step S103: the relative positions of the weight assembly 130 and the hub 200 are adjusted and the mounting holes 210 corresponding to the blades 300 are directed in a predetermined direction. When the blade 300 is plural, before each blade 300 is hoisted, the relative positions of the weight assembly 130 and the hub 200 can be adjusted, and the mounting hole 210 corresponding to the blade 300 to be mounted is oriented to a preset direction.

The preset direction can be set according to the hoisting requirement, for example, when the blade 300 is hoisted by using the single-blade horizontal hoisting method, the preset direction is the horizontal direction.

In some alternative embodiments, as described above, there are three blades 300, and the three blades 300 are the first blade 310, the second blade 320, and the third blade 330, respectively. The number of the mounting holes 210 is three, and the three mounting holes 210 are a first mounting hole 211, a second mounting hole 212, and a third mounting hole 213, respectively.

Before each blade 300 is installed, the installation hole 210 corresponding to the blade 300 may be oriented in a preset direction, for example, a horizontal direction, through step S103, so that each blade 300 may be hoisted using a single-blade horizontal hoisting method.

For example, step S104 includes step S1041: the first blade 310 is mounted to the first mounting hole 211. Before step S1041, i.e., before the first blade 310 is mounted to the first mounting hole 211, step S103 includes, for example, step S1031: the relative positions of the weight assembly 130 and the hub 200 are adjusted and the first mounting hole 211 is oriented in a horizontal direction. So that the first blade 310 can be hoisted using the single-blade horizontal hoisting method.

The mounting hole 210 faces the preset direction, that is, the axial direction of the mounting hole 210 is consistent with the preset direction, and the axis P of the pitch bearing 220 in the mounting hole 210 is parallel to the preset direction. For example, when the predetermined direction is a horizontal direction, the mounting hole 210 faces the horizontal direction, and the axis P of the pitch bearing 220 in the mounting hole 210 is parallel to the horizontal direction.

As shown in fig. 10 to 14, the arrows in fig. 10 show the direction of rotation of the carrier bar 120 when it follows the pitch bearing 220.

In some optional embodiments, for example, the method further includes step S102: the hub 200 is hoisted to a predetermined height. For example, the tower 400 is provided with an installation site of the hub 200, and the hub 200 is lifted to a height corresponding to the installation site.

In some alternative embodiments, step S1031 may be performed before step S102, for example, to adjust the shape of the wheel hub 200 before the wheel hub 200 is lifted to the preset height, as shown in fig. 12 and 13, and to make the first mounting hole 211 on the wheel hub 200 face the preset direction by adjusting the relative positions of the weight assembly 130 and the wheel hub 200 shown in fig. 10 and 11 before the wheel hub 200 is lifted to the preset height. Therefore, the overhead working capacity can be reduced, and the hoisting efficiency can be improved. For example, after the hub 200 is lifted off the ground, the form of the hub 200 may be adjusted by step S1031 such that the first mounting hole 211 is directed to a preset direction.

There are various ways to adjust the relative positions of the weight assembly 130 and the hub 200 in step S103, for example, when the length of the connecting arm 120 is adjustable, adjusting the relative positions of the weight assembly 130 and the hub 200 includes: the relative position of the weight component 130 and the hub 200 is adjusted by adjusting the included angle between the bearing rod 110 and the connecting arm 120; the relative position between the weight assembly 130 and the hub 200 is changed by adjusting the length of the connecting arm 120.

In these alternative embodiments, when the length of the connecting arm 120 is adjustable, the relative position between the weight assembly 130 and the hub 200 can be changed by adjusting the length of the connecting arm 120, or the relative position between the weight assembly 130 and the hub 200 can be changed by adjusting the length of the connecting arm 120 in cooperation with adjusting the included angle between the connecting arm 120 and the carrying rod 110, or the relative position between the weight assembly 130 and the hub 200 can be changed by only adjusting the included angle between the connecting arm 120 and the carrying rod 110.

In still other alternative embodiments, coupling the load bar 110 to the pitch bearing 220 in one of the mounting holes 210, adjusting the relative position of the weight assembly 130 and the hub 200 includes: the relative position of the weight component 130 and the hub 200 is adjusted by adjusting the included angle between the bearing rod 110 and the connecting arm 120; and/or, the relative position of counterweight assembly 130 and hub 200 is adjusted by rotating pitch bearing 220.

In these alternative embodiments, by mounting the load-bearing rod 110 to the pitch bearing 220, the relative positions of the auxiliary device 100 and the hub 200, and thus the counterweight assembly 130 and the hub 200, can be adjusted simply and conveniently by rotating the pitch bearing 220.

In other alternative embodiments, where the position of the weight assembly 130 on the connecting arm 120 is adjustable, adjusting the relative positions of the weight assembly 130 and the hub 200 includes: the relative position of the weight component 130 and the hub 200 is adjusted by adjusting the included angle between the bearing rod 110 and the connecting arm 120; and/or, the relative position of the weight assembly 130 and the hub 200 is adjusted by adjusting the relative position of the weight assembly 130 and the connecting arm 120.

In some alternative embodiments, before the first blade 310 is mounted to the first mounting hole 211, the method further includes step S1020: the hub 200 is mounted on the tower 400 of the wind park. It is understood that the hub 200 may be mounted on the tower 400 of the wind turbine generator set after step S1031 and before the first blade 310 is mounted, so that the first blade 310 may be directly hoisted after the hub 200 is mounted.

Alternatively, it is also possible to mount the hub 200 on the tower 400 of the wind turbine generator set before step S1031, then adjust the relative position of the weight assembly 130 and the hub 200 according to step S1031, and rotate the hub 200 such that the first mounting hole 211 faces the preset direction. Since the relative positions of the weight assembly 130 and the hub 200 can be adjusted, the first rotational torque value applied to the hub 200 by the assisting apparatus 100 can be reduced. Or the weight of the auxiliary device 100 may be caused to drive the hub 200 to rotate by adjusting the weight assembly 130 to the appropriate position. Because the stress of the hub 200 is small, the hub 200 can be conveniently locked at the preset position by a brake system of the wind generating set.

As shown in fig. 15, after step S1031, the first blade 310 is hoisted to the first mounting hole 211 by the single-blade horizontal hoisting method.

Step S104 includes step S1042: the second vane 320 is mounted to the second mounting hole 212.

As shown in fig. 16, before step S1042, i.e., before the second blade 320 is mounted, step S103 includes step S1032: adjusting the relative positions of the mass assembly 130 and the hub 200 such that a difference between a first rotational torque applied to the hub 200 by the assisting apparatus 100 and a second rotational torque applied to the hub 200 by the first blade 310 is within a preset difference range; the hub 200 is rotated such that the second mounting hole 212 is directed to a predetermined direction. The arrows in fig. 16 indicate the direction of rotation of the hub.

Before the second blade 320 is mounted, the first blade 310 is already mounted on the hub 200, and the auxiliary device 100 and the first blade 310 are substantially balanced with respect to the hub 200 by first adjusting the relative positions of the weight assembly 130 and the hub 200 such that the difference between the first rotational moment and the second rotational moment is within a preset range, thereby reducing the load of the hub 200. It is convenient to rotate hub 200 according to the hoist and mount demand, uses less power just can drive hub 200 and rotate, and braking system uses less power can lock hub 200 on pylon 400.

The preset difference range is not limited herein, and the user may set the preset difference range according to the performance of the wind turbine generator system, and the preset difference range may be set to be larger when the wind turbine generator system can apply a larger driving force to the hub 200 or when the wind turbine generator system can apply a larger braking force to the hub 200. In contrast, the preset difference range may be set smaller.

In some optional embodiments, for example, the method further includes obtaining an angle and a gravity of the first blade 310, so as to determine a value of the second rotation moment according to the angle and the gravity of the first blade 310.

In some alternative embodiments, step S103 further includes, for example, acquiring a rotation angle of the hub 200, and adjusting the relative positions of the counterweight assembly 130 and the hub 200 according to a rotation speed of the hub 200. So as to prevent the hub 200 from rotating too fast and being unable to fix the hub 200 at the predetermined position, and the mounting hole 210 faces the predetermined direction.

In some alternative embodiments, the first and second turning moments may also be sized according to the turning direction of the first blade 310, the auxiliary device 100 and the hub 200. As shown in fig. 15, in the view direction shown in fig. 15, the first blade 310 is located at the right side of the hub 200, the auxiliary device 100 is located at the left side of the hub 200, and when the hub 200 needs to be rotated clockwise to orient the second mounting hole 212 to the horizontal direction, the first rotational moment may be smaller than the second rotational moment, enabling the gravity T2 of the first blade 310 to serve as a driving force for rotating part or all of the hub 200. And then the gravity T2 of the first blade 310 is used for driving the hub 200 to rotate, so that the wind generating set is not needed to drive the hub 200 to rotate, or the driving force provided by the wind generating set to the hub 200 can be reduced, and the purpose of saving resources is achieved.

As shown in fig. 17, after the second installation hole 212 is oriented to the predetermined direction, before the second blade 320 is installed, or when the second blade 320 is installed, or after the second blade 320 is installed, the method according to the second embodiment of the present invention further includes: the relative positions of the weight assembly 130 and the hub 200 are adjusted such that the center of gravity of the auxiliary device 100 and the suspension point of the hub 200 are distributed in the vertical direction.

In these alternative embodiments, the overall turning moment experienced by the hub 200 is increased since after the second blade 320 is installed, if the auxiliary device 100 remains substantially balanced with the first blade 310. By adjusting the relative positions of the weight assembly 130 and the hub 200 such that the center of gravity of the auxiliary device 100 and the suspension point of the hub 200 are distributed in the vertical direction, the second blade 320 and the first blade 310 are relatively balanced, the first torque applied to the hub 200 by the auxiliary device 100 is small, and the stability of the relative position between the hub 200 and the tower 400 is ensured.

It is understood that the center of gravity of the auxiliary device 100 and the suspension point of the hub 200 are distributed in the vertical direction, not strictly in the vertical direction, as long as the center of gravity of the auxiliary device 100 and the suspension point of the hub 200 are distributed in the vertical direction within the error range, the first torque applied to the hub 200 by the auxiliary device 100 is reduced, and the first blade 310 and the second blade 320 can be approximately balanced with respect to the hub 200.

In some alternative embodiments, the load bar 110 of the auxiliary device 100 is directly connected to the pitch bearing 220 in the third mounting hole 213, and by rotating the pitch bearing 220, the load bar 110 can be rotated, thereby changing the relative position between the weight assembly 130 and the hub 200.

As shown in fig. 18 to 21, wherein the arrow in fig. 18 indicates the direction of rotation of the carrier bar 110 following the rotation of the pitch bearing 220.

Step 104 includes step 1043: the third blade 330 is mounted to the third mounting hole 213. Before step S1043, i.e. before mounting the third blade 330, step S103 for example comprises step 1033: the relative positions of the weight assembly 130 and the hub 200 are adjusted such that the gravity of the auxiliary device 100 acts as at least a partial driving force for driving the hub 200 to rotate, rotates the hub 200, and directs the third mounting hole 213 to a predetermined direction.

In these alternative embodiments, since the first blade 310 and the second blade 320 are already mounted to the hub 200, the wind turbine may require a particularly large force to be applied to drive the hub 200 to rotate. By adjusting the relative positions of the counterweight assembly 130 and the hub 200, the gravity of the auxiliary device 100 can be used as part or all of the driving force for driving the hub 200 to rotate, the driving force applied by the wind generating set to the hub 200 can be reduced, and the hub 200 provided with the first blades 310 and the second blades 320 can rotate relative to the tower 400.

It will be appreciated that a locking operation of the hub 200 is required before each blade 300 is hoisted, so that the hub 200 is positionally stabilized relative to the tower 400. Before rotating the hub 200, an unlocking operation of the hub 200 is required so that the hub 200 can be rotated with respect to the tower 400.

As shown in fig. 22, in some alternative embodiments, step S104 includes step S1041, step S1042, step S1043, step S103 includes step S1031, step S1032, and step S1033, and step S1031 precedes step S1041, step S1032 precedes step S1042, and step S1033 precedes step S1043, that is, before each blade 300 is hoisted to the mounting hole 210 corresponding to the blade, the relative position between the weight assembly 130 and the hub 200 is adjusted by the auxiliary device 100, so as to reduce the rotational moment applied to the hub 200 by the auxiliary device 100 and the blade 300, so that the hub 200 can rotate relative to the tower 400, or so that the braking system of the wind turbine generator set can lock the hub 200 at a preset position, and realize horizontal hoisting of each blade 300.

The following briefly describes the method of using the auxiliary device 100 in detail, taking fig. 9 to 21 as an example:

the method comprises the following steps: as shown in fig. 9, the hub 200 is placed on the ground with the three mounting holes 210 of the hub 200 facing in the horizontal direction. The connection plate 111 on the carrier bar 110 is connected to the pitch bearing 220 in the third mounting hole 213.

Step two: as shown in fig. 10 to 12, after the wheel hub 200 is lifted off the ground, the relative positions of the weight assembly 130 and the wheel hub 200 are adjusted to change the configuration of the auxiliary device 100, so that the wheel hub 200 rotates and the first mounting hole 211 of the wheel hub 200 faces the horizontal direction.

Wherein the relative position of the weight assembly 130 and the hub 200 can be adjusted by adjusting the length of the connecting arm 120, the angle between the connecting arm 120 and the carrier bar 110, the position of the weight assembly 130 on the connecting arm 120, rotating the pitch bearing 220 in the third mounting hole 213, etc.

Specifically, as shown in fig. 10, the lengths of the connecting arm 120 and the telescopic rod 160 are adjusted according to the directions shown by the arrows, and the bearing rod 110 rotates along the arrows shown in the figure along with the pitch bearing 220. Turning to FIG. 11, the axis P of the pitch bearing 220 within the first mounting hole 211 is horizontal. Fig. 12 is a schematic view of the structure in another viewing angle direction.

Step three: as shown in fig. 14, the hub 200 is lifted to a predetermined height by the auxiliary device 100, for example, the hub 200 may be lifted to a predetermined height using a crane, and the hub 200 may be mounted on the tower 400.

Step four: as shown in FIG. 15, after hub 200 is installed, hub 200 is locked such that axis P of pitch bearing 220 within first mounting hole 211 is horizontal.

Before hub 200 is locked, if first mounting hole 211 is offset from horizontal when hub 200 and tower 400 are docked, hub 200 may be fine-tuned as long as first mounting hole 211 is oriented horizontally when locked.

Step five: as shown in fig. 15, the first blade 310 is hoisted by using the other auxiliary device 100 by using a single-blade horizontal hoisting method, and the installation of the first blade 310 is completed.

Step six: with continued reference to fig. 15, after the first blade 310 is installed, the relative positions of the weight assembly 130 and the hub 200 are adjusted such that the first rotational torque applied to the hub 200 by the auxiliary device 100 and the second rotational torque applied to the hub 200 by the first blade 310 are within a predetermined difference. For example, so that the first rotational moment is slightly less than the second rotational moment.

In this case, the wind turbine generator system corresponds to a state in which there are two blades 300. The weight assembly 130 is located at the left side of the hub 200, and the first rotational moment is slightly smaller than the second rotational moment, which facilitates the hub 200 to rotate clockwise under the gravity of the first blade 310, so that the second mounting hole 212 is in a horizontal position.

In step six, the connecting arm 120 is extended to the opposite direction of the first blade 310, for example, by rotating the pitch bearing 220, and the length of the connecting arm 120 is extended, so that the included angle between the connecting arm 120 and the bearing rod 110 is increased, the configuration of the auxiliary device 100 is close to that of the first blade 310, and therefore the auxiliary device 100 and the first blade 310 are approximately balanced with respect to the hub 200.

Step seven: as shown in FIG. 16, with hub 200 unlocked, hub 200 is rotated clockwise by the weight force T2 of first blade 310 such that axis P of pitch bearing 220 within second mounting hole 212 is in a horizontal position. At this point hub 200 is again locked to tower 400.

Step eight: as shown in fig. 17, the other auxiliary device 100 is used to hoist the second blade 320 by using the single-blade horizontal hoisting method, and the second blade 320 is installed on the pitch bearing 220 in the second installation hole 212.

It will be appreciated that, in order to ensure that the first blade 310 and the second blade 320 are balanced with respect to the hub 200, before, during, or after step eight, the relative positions of the weight assembly 130 and the hub 200 are adjusted, for example, the length of the connecting arm 120 is shortened, and the angle between the connecting arm 120 and the load-bearing bar 110 is changed, so that the center of gravity of the auxiliary device 100 and the suspension point of the hub 200 are distributed in the vertical direction, and the first torque value applied by the auxiliary device 100 to the hub 200 is reduced.

Step nine: as shown in FIG. 18, rotating pitch bearing 220 in third mounting hole 213 changes the orientation of connecting arm 120 and adjusts the relative positions of counterweight assembly 130 and hub 200 by extending connecting arm 120, changing the angle between connecting arm 120 and load bar 110, etc. to substantially balance first blade 310, second blade 320, and auxiliary device 100 with respect to hub 200. Preferably, the first torque applied to the hub 200 by the auxiliary device 100 is larger than the torque applied to the hub 200 by either of the first blade 310 and the second blade 320, so that the auxiliary device 100 can "turn" the hub 200, i.e. the gravity of the auxiliary device 100 is used as at least part of the driving force for driving the hub 200 to turn.

Step ten: as shown in fig. 19 and 20, the hub 200 is unlocked such that the hub 200 is rotated by the gravity of the auxiliary device 100, and the hub 200 is locked by the braking system when the third mounting hole 213 is oriented in the horizontal direction.

Step eleven: as shown in fig. 21, the auxiliary device 100 is detached from the third mounting hole 213, and the third blade 330 is horizontally lifted and mounted at the third mounting hole 213 by using the single-blade horizontal lifting method.

And the whole impeller is hoisted.

It should be noted that in the above steps, when the hub 200 is rotated, the rotation speed of the hub 200 should not be too fast, otherwise the brake system of the wind turbine may have difficulty in locking the hub 200. The control device in the remote controller 150 can rapidly calculate parameters such as the length of the connecting arm 120, the included angle between the connecting arm 120 and the carrying rod 110, and the like according to the weight of the blades 300, the number of the blades 300, the position of the center of gravity, the state of the auxiliary device 100, and the like, so as to adjust the relative positions of the weight assembly 130 and the hub 200 according to the parameters.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. An auxiliary device (100) for adjusting the balance of a suspended object, the auxiliary device (100) comprising:

a load-bearing rod (110) for connecting the hoisted object;

the connecting arm (120) is connected to the bearing rod (110) and is rotatably arranged around the bearing rod (110), so that the included angle between the connecting arm (120) and the bearing rod (110) is adjustable;

the connecting arm (120) is further provided with a counterweight component (130), so that the relative position of the counterweight component (130) and the hung object can be changed by adjusting the included angle between the connecting arm (120) and the carrying rod (110).

2. The assistance device (100) according to claim 1, wherein the extension length of the connecting arm (120) is adjustable such that the relative position of the weight assembly (130) and the load bar (110) in the extension direction of the connecting arm (120) is adjustable.

3. The auxiliary device (100) according to claim 2, wherein the connecting arm (120) comprises more than two connecting rods (121) connected with each other, and one of the two connecting rods (121) is provided with a guide cylinder extending along the extending direction, and the other connecting rod is movably arranged in the guide cylinder along the extending direction.

4. The auxiliary device (100) according to claim 2, further comprising a first sensor for acquiring the extension length of the connecting arm (120).

5. Auxiliary device (100) according to claim 2, further comprising a remote control (150), wherein the remote control (150) is configured to adjust an angle between the connecting arm (120) and the carrier bar (110), and/or wherein the remote control (150) is configured to adjust an extension length of the connecting arm (120).

6. The assistance device (100) according to claim 1, wherein the counterweight assembly (130) is movably arranged in the extension direction of the connecting arm (120) such that the relative position of the counterweight assembly (130) and the carrier bar (110) in the extension direction of the connecting arm (120) is adjustable.

7. The assistance device (100) according to claim 1, further comprising a telescopic rod (160), wherein one end of the telescopic rod (160) is connected to the carrying rod (110), the other end of the telescopic rod (160) is connected to the connecting arm (120), and the length of the telescopic rod (160) is adjustable, so that the included angle between the carrying rod (110) and the connecting arm (120) can be adjusted by the telescopic rod (160).

8. The auxiliary device (100) according to claim 7, further comprising:

the angle sensor is used for acquiring an included angle between the bearing rod (110) and the connecting arm (120);

and/or a distance sensor for acquiring the length of the telescopic rod (160);

and/or a weight scale for acquiring a weight (130) of the weight assembly.

9. The auxiliary device (100) according to claim 1, wherein a lifting lug (140) for lifting is further provided on the connecting arm (120), and the counterweight assembly (130) is located on a side of the lifting lug (140) facing away from the carrier bar (110).

10. A method of hoisting an impeller comprising a hub (200) and blades (300), the hub (200) comprising mounting holes (210) for connecting the blades (300), using the aid (100) according to any one of claims 1-9, characterized in that the method comprises:

connecting the carrier bar (110) to the hub (200);

mounting the blade (300) to the mounting hole (210);

wherein before each blade (300) is mounted to the mounting hole (210), the method further comprises: adjusting the relative positions of the weight assembly (130) and the hub (200), and orienting the mounting holes (210) corresponding to the blades (300) in a preset direction.

11. The method of claim 10, wherein the connecting arm (120) is adjustable in length, and wherein adjusting the relative positions of the weight assembly (130) and the hub (200) comprises:

adjusting the relative position of the weight component (130) and the hub (200) by adjusting the included angle of the bearing rod (110) and the connecting arm (120);

and/or adjusting the relative position of the weight assembly (130) and the hub (200) by adjusting the length of the connecting arm (120).

12. The method of claim 10, wherein the hub (200) includes more than two mounting holes (210), and wherein attaching the load bar (110) to the hub (200) includes: -connecting the carrier bar (110) to a pitch bearing (220) in one of the mounting holes (210);

the adjusting the relative position of the weight assembly (130) and the hub (200) comprises:

and/or adjusting the relative position of the counterweight assembly (130) and the hub (200) by rotating the pitch bearing (220).

13. The method of claim 10, wherein the position of the weight assembly (130) on the connecting arm (120) is adjustable, the adjusting the relative positions of the weight assembly (130) and the hub (200) comprising:

and/or adjusting the relative position of the weight assembly (130) and the hub (200) by adjusting the relative position of the weight assembly (130) and the connecting arm (120).

14. The method according to claim 10, wherein the number of the blades (300) is two or more, the two or more blades (300) include a first blade (310) and a second blade (320) which are sequentially mounted to the hub (200), the number of the mounting holes (210) is two or more, and the two or more mounting holes (210) include a first mounting hole (211) for mounting the first blade (310) and a second mounting hole (212) for mounting the second blade (320);

the mounting the blade (300) to the mounting hole (210) further comprises: mounting the first blade (310) to the first mounting hole (211);

the adjusting the relative positions of the weight assembly (130) and the hub (200) and orienting the mounting hole (210) corresponding to the blade (300) to a preset direction includes: adjusting the relative positions of the counterweight assembly (130) and the hub (200) and enabling the counterweight assembly and the first mounting hole (211) to face a preset direction;

wherein before the first blade (310) is mounted to the first mounting hole (211), further comprising: mounting the hub (200) on a tower (400) of a wind power plant.

15. The method of claim 14,

mounting the hub (200) on a tower (400) of a wind turbine generator set before adjusting the relative positions of the counterweight assembly (130) and the hub (200) and enabling the first mounting hole (211) to face a preset direction;

or, before the hub (200) is installed on a tower (400) of a wind generating set, the relative positions of the counterweight assembly (130) and the hub (200) are adjusted, and the first installation hole (211) is made to face a preset direction.

16. The method of claim 14,

the mounting the blade (300) to the mounting hole (210) further comprises: mounting the second blade (320) to the second mounting hole (212);

before the second blade (320) is mounted to the second mounting hole (212), the adjusting the relative positions of the weight assembly (130) and the hub (200), and the orienting the mounting hole (210) corresponding to the blade (300) to a preset direction further includes:

adjusting the relative positions of the counterweight assembly (130) and the hub (200) such that the difference between a first turning moment applied by the auxiliary device (100) to the hub (200) and a second turning moment applied by the first blade (310) to the hub (200) is within a preset difference range;

rotating the hub (200) such that the second mounting hole (212) is oriented in a predetermined direction.

17. The method of claim 16, further comprising, after said rotating said hub (200) to orient said second mounting hole (212) in a predetermined direction:

adjusting the relative positions of the weight assembly (130) and the hub (200) such that the center of gravity of the weight assembly (130) and the lifting point of the hub (200) are distributed in a vertical direction.

18. The method of claim 16,

the more than two blades (300) further comprise a third blade (330), the hub (200) further comprises a third mounting hole (213) for mounting the third blade (330), and the bearing rod (110) is connected to the third mounting hole (213);

the mounting the blade (300) to the mounting hole (210) further comprises: mounting the third blade (330) to the third mounting hole (213);

before the third blade (330) is mounted to the third mounting hole (213), the adjusting the relative positions of the weight assembly (130) and the hub (200) and the orienting the mounting hole (210) corresponding to the blade (300) to a preset direction further includes:

adjusting the relative positions of the counterweight assembly (130) and the hub (200) so that the gravity of the auxiliary device (100) is used as at least part of driving force for driving the hub (200) to rotate, the hub (200) is rotated, and the third mounting hole (213) faces to a preset direction.