CN114873485A

CN114873485A - Tower top self-hoisting device and method for wind generating set

Info

Publication number: CN114873485A
Application number: CN202111014309.2A
Authority: CN
Inventors: 崔新维; 崔逸南
Original assignee: Beijing Sanli Xinneng Electrical Equipment Co ltd
Current assignee: Beijing Sanli Xinneng Electrical Equipment Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-08-09

Abstract

The invention discloses a tower top self-hoisting device and a tower top self-hoisting method for a wind generating set. The tower top self-hoisting device comprises a support, a crane boom, a translation trolley, a slewing bearing, a tower cap, a balance arm, a trolley lifting hook, a winch, a hoisting machine, a first set of rope, a second set of rope and a pulley. The parts of the self-hoisting device can be conveyed to the interior of the cabin through a hoisting machine in the cabin or an automobile crane. The bottom end of the bracket is connected with a base of the wind generating set, the top end of the bracket is connected with a slewing bearing fixed ring, and a slewing bearing rotating ring is connected with a crane boom, a tower cap and a balance arm; the crane boom is provided with a track, and the translation trolley can horizontally move on the crane boom along the track. The self-hoisting device can be assembled and disassembled manually or in a tool mode, and is used for hoisting and putting down heavy parts such as a generator, a gear box, a converter, a transformer and the like in a cabin, so that a conventional large-scale hoisting device is replaced, and the operation and maintenance cost is greatly reduced.

Description

Tower top self-hoisting device and method for wind generating set

Technical Field

The invention belongs to the technical field of wind power generation, and particularly relates to a tower top self-hoisting device and a tower top self-hoisting method for a wind generating set.

Background

The nacelle of a wind turbine generator system typically includes a main shafting, a gearbox, a generator, and peripheral auxiliary equipment (e.g., lubrication, cooling systems, etc.). Due to the high speed continuous operation of the gearbox and generator, maintenance and replacement is far more likely to be required than other components. The capacity of modern wind generating sets is increasing, the size and the weight of the gear box and the generator are increasing continuously, and the maximum weight of the gear box and the generator of the double-fed and medium-speed generating sets exceeds 40 tons. Meanwhile, in order to obtain higher wind speeds, a hub center height of over 100 meters has become a conventional configuration. In the event of an event that the gearbox or generator needs to be repaired or replaced, it is conventional to hoist the components in the nacelle to the ground using a crane. If large wind power plants continue to use this type of method, the economics will be poor.

CN 202545121U, CN 211310597U and CN 201395498Y all propose a technical scheme with a crane, and parts on the tower are transported to the tower bottom through a winch at the tower bottom.

The inventions of CN 211310597U, CN 211343235U, CN 101224855B, CN 201729604U, CN 206188299U and the like all adopt the technical scheme of a portal frame type, but are only suitable for moving heavy objects in a cabin.

CN 108105041 a proposes a solution for maintenance and hoisting of a gearbox, but needs to transport parts from a cabin to the bottom of a tower in batches.

These prior art solutions basically rely on the original nacelle frame as a foundation for the support of the lifting equipment. As the unit capacity increases, the weight of the components increases and the nacelle frame cannot be reinforced specifically for maintenance replacement, which is a poor economic solution. If the parts are detached at the top of the tower, time consumption becomes a problem, the unit cannot normally operate at a later time, and adverse effects are generated on the economic benefits of the wind power plant.

Disclosure of Invention

In view of this, an object of the embodiments of the present invention is to provide a tower top self-hoisting device and a tower top self-hoisting method for a wind turbine generator system, so as to solve at least one technical problem in the background art.

In order to achieve the above object, a first aspect provides a tower top self-lifting device of a wind generating set, which includes: the lifting device comprises a support, a crane boom, a translation trolley, a slewing bearing, a tower cap, a balance arm, a trolley lifting hook, a winch, a hoister, a rope and a pulley.

The bottom end of the support is connected with a base of the wind generating set, the top end of the support is connected with a fixed ring of the slewing bearing, a rotating ring of the slewing bearing is connected with the tower cap, and the balance arm and the crane arm are respectively connected with the tower cap. The crane boom and the tower cap are connected by a pull rod or a pull rope between the balance arm and the tower cap.

The crane boom is provided with the track, and translation dolly can be along track horizontal migration. The rope is wound around a pulley on the translation trolley to be connected with a hoisting machine in the cabin and a trolley lifting hook. Pulleys are arranged on the tower cap and the balance arm, and a rope is wound around the pulleys to be connected with the hoisting hook and the winch at the tower bottom.

In a further aspect, the hoist is configured to transport the support, the boom, the translational carriage, the slewing bearing, the tower cap, the balance arm, the carriage hook, and the crane hook to an interior of the nacelle.

In a further aspect of the present invention,

the translation trolley is used for moving to the position above the hoisted part;

the trolley lifting hook is used for hooking the hoisted part when the translation trolley moves to the upper part of the hoisted part;

the hoisting machine is also used for hoisting the hoisted part to a preset height when the trolley lifting hook hooks the hoisted part, so that the bottom of the hoisted part is at least higher than the top end of the cabin cover by a preset distance;

the translation trolley is also used for translating on the track of the crane arm so as to send the hoisted part to the outside of a cabin;

the hoisting hook is used for hooking the hoisted part;

the hoisting machine is used for hoisting the hoisted part for a preset distance through the hoisting hook, unhooking the trolley lifting hook after the trolley lifting hook and the connected first set of ropes are not loaded, and putting down the hoisted part to the tower bottom after unhooking;

wherein the hoisted component comprises: a gearbox, generator, converter or transformer;

wherein, the fixed point of lifting machine includes: a main shaft, a base, a tower or a tower cap;

and a preset allowance is reserved for the length of the second set of ropes so as to ensure that the hoisted part is not loaded when being hoisted by the first set of ropes.

In a further technical scheme, the winch is fixedly connected to the base of the wind generating set through a connecting piece.

In a further technical scheme, a cabin cover body is detachably arranged at the top of the cabin; alternatively, the nacelle roof is provided with a nacelle cover that can be moved along the nacelle roof.

In a further technical scheme, the tower top self-lifting device of the wind generating set further comprises:

the rotating tool is used for enabling a rotating ring of a yaw support of the wind generating set to rotate by 60-120 degrees; and the number of the first and second groups,

and the mounting tool is used for assembling the support, the crane boom, the translation trolley, the slewing bearing, the tower cap, the balance arm, the trolley lifting hook, the first set of rope, the second set of rope and the pulley according to the connection relation among all the parts after the support, the crane boom, the translation trolley, the slewing bearing, the tower cap, the balance arm, the trolley lifting hook, the first set of rope, the second set of rope, the pulley, the winch and the lifting machine are conveyed into the cabin through the lifting machine or the automobile crane in the cabin, so that the tower top self-lifting device of the wind generating set is obtained.

In a further technical scheme, the base is arranged in a cabin of the wind generating set; the winch is arranged at the bottom of the tower of the wind generating set.

In a further technical scheme, a pulley is mounted at the top of the tower cap; the upper surface of the balance arm is provided with a pulley; and the top of the translation trolley is provided with a pulley.

In a second aspect, a tower top self-hoisting system of a wind generating set is provided, which comprises:

the tower top self-lifting device of the wind generating set is characterized by comprising a tower top self-lifting device;

the hoisting machine is arranged in a cabin of the wind generating set; and (c) a second step of,

and the winch is arranged at the bottom of the tower of the wind generating set.

In a third aspect, a hoisting method for a tower top self-hoisting system of a wind generating set is provided, which comprises the following steps:

s1, conveying the support, the crane boom, the translation trolley, the slewing bearing, the tower cap, the balance arm, the trolley hook, the crane hook, the first set of ropes, the second set of ropes and the pulley into the cabin through a hoisting machine in the cabin, a conveying device in the tower barrel or an automobile crane;

s2, assembling the support, the crane boom, the translation trolley, the slewing bearing, the tower cap, the balance arm, the trolley hook, the crane hook, the first set of rope, the second set of rope and the pulley by using an installation tool, and obtaining the tower top self-hoisting device of the wind generating set after assembling;

s3, moving the translation trolley to the position above the hoisted part;

s4, hooking the hoisted part by using a trolley lifting hook, wherein one end of a first set of ropes is connected with the trolley lifting hook, and the other end of the first set of ropes is connected with a hoist in the cabin;

s5, hooking the hoisted part by using a hoisting hook, and connecting the hoisting hook with a winch at the bottom of the tower by using a second set of ropes;

s6, fixing the translation trolley on a crane arm by using a fixing piece;

s7, hoisting the hoisted part to a preset height by using a hoist, wherein the bottom of the hoisted part is at least higher than the top end of the cabin cover by a preset distance, and the power provided by the hoist at least overcomes half gravity of the hoisted part;

s8, rotating a rotating ring of the yaw support by a preset angle by using a rotating tool, and enabling the hoisted part to be completely positioned outside the engine room;

s9, starting the winch, hoisting the hoisted part for a preset distance, and unhooking the trolley lifting hook after the trolley lifting hook and the connected first set of ropes are not loaded;

and S10, lowering the hoisted part to the bottom of the tower by using a winch.

Optionally, the hoisted component comprises: a gearbox, generator, converter or transformer; the fixed point of lifting machine includes: a spindle, a base, a tower, or a tower cap; the length of the second set of ropes is reserved with a preset allowance for ensuring that the hoisted part is not loaded when being hoisted by the first set of ropes; the preset angle of the rotating ring is 60-120 degrees.

The beneficial effects of the above technical scheme include:

according to the embodiment of the invention, the hoisting of parts such as a gear box or a generator and the transportation between the tower bottom and the tower top can be completed through the trolley lifting hook, the lifting hook, the winch, the rope and the pulley. The top part of the self-hoisting device is easy to assemble and disassemble. When the wind turbine generator set is used for replacing large parts such as a generator, a gear box, a converter or a transformer, a conventional large crane is not needed, and the operation and maintenance cost is greatly reduced.

Drawings

FIG. 1 is a schematic view of a tower top self-hoisting device of a wind generating set according to an embodiment of the invention;

FIG. 2 is a side view of a wind generating set and a tower top self-lifting device thereof according to an embodiment of the invention;

FIG. 3 is a top view of a self-hoisting device at the top of a tower of a wind generating set according to an embodiment of the invention;

fig. 4 is a flowchart of a hoisting method of a tower top self-hoisting system of a wind generating set according to an embodiment of the invention.

The reference numbers illustrate: 1-tower, 2-cabin, 3-base, 4-cabin cover, 5-support, 6-cargo boom, 7-translation trolley, 8-slewing bearing, 9-tower cap, 10-balance arm, 11-trolley hook, 12-lifting hook, 13-winch, 14-first set of rope, 15-pulley, 16-gear box, 17-generator, 18-wind turbine generator base and 19-second set of rope.

It is noted that the above-described figures are intended to illustrate the features of the invention and are not intended to show any actual structure or to reflect the dimensional, relative proportions and other details of the various components. In order to more clearly illustrate the principles of the present invention and to avoid obscuring the principles of the present invention with unnecessary detail, the examples in the figures have been simplified. These figures do not represent an inconvenience for a person skilled in the relevant art in understanding the present invention, while the actual wind turbine tower top self-lifting device may comprise further components.

Detailed Description

In order to make the purpose and technical solution of the embodiments of the present invention clearer, the following describes the embodiments of the present invention completely with reference to the related drawings of the embodiments of the present invention. This patent describes only a few embodiments and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-3, a self-hanging device for a horizontal axis wind generating set tower top comprises: support 5, boom 6, dolly 7, slewing bearing 8, tower cap 9, balance arm 10, trolley hook 11, crane hook 12, hoist 13, hoist, first set of ropes 14, second set of ropes 19 and pulley 15.

The support frame 5, the crane boom 6, the travelling bogie 7, the slewing bearing 8, the tower cap 9, the balance arm 10, the bogie hook 11 and the crane hook 12 are all detachable and can be transported to the interior of the nacelle 2 by means of a hoisting machine in the nacelle 2 or a hoisting device (such as a crawler or an elevator) in the tower or by means of a truck crane for assembly. Because the individual components are lightweight, assembly can be accomplished manually or with simple tooling. The hoist 13 can be transported to the side of the wind turbine generator by using a truck crane and then is fixedly connected to the foundation 18 of the wind turbine generator by a connecting piece.

The cabin cover 4 above the parts such as the base 3, the gear box 16, the generator 17, the converter and the like can be detached or moved, so that the self-hoisting device is convenient to install, and meanwhile, the hoisting of the large parts such as the gear box 17, the generator 16 and the like is also completed. The bottom end of the bracket 5 is connected with a base 3 of the wind generating set, the top end is connected with a fixed ring of a slewing bearing 8, the slewing bearing 8 rotates to be connected with a tower cap 9, and the balance arm 10 and the crane arm 6 are connected with the tower cap 9. The crane boom 6 is connected with the tower cap 9, and the balance arm 10 is connected with the tower cap 9 through a pull rod or a pull rope.

The crane boom 6 is provided with a track, and the translation trolley 7 can horizontally move along the track. A first set of ropes 14 is coupled to the hoist in the nacelle 2 and to the trolley hook 11, passing around pulleys 15 on the dolly 7. Pulleys 15 are mounted on the tower cap 9, the translation trolley 7 and the balance arm 10, and a second set of ropes 19 are wound around the pulleys 15 to connect the lifting hook 12 with the winch 13 at the bottom of the tower.

In some embodiments, a hoist 13 may be used to transport the frame 5, the boom 6, the translating trolley 7, the slewing bearing 8, the tower cap 9, the balance arm 10, the trolley hook 11 and the lifting hook 12 to the interior of the nacelle 2.

In some embodiments, a translation trolley 7 for moving above the hoisted component; the trolley lifting hook 11 is used for hooking the hoisted part when the translation trolley 7 moves to the upper part of the hoisted part; the hoister is also used for hoisting the hoisted part to a preset height when the trolley lifting hook 11 hooks the hoisted part, so that the bottom of the hoisted part is at least higher than the top end of the cabin cover by a preset distance; the translation trolley 7 is also used for translating on the track of the crane arm 6 so as to send the hoisted part to the outside of the cabin 2; a lifting hook 12 for hooking the hoisted part; the winch 13 is used for hoisting the hoisted part for a preset distance through the hoisting hook 12, unhooking the trolley hoisting hook 11 after the trolley hoisting hook 11 and the connected first set of ropes 14 are not loaded, and lowering the hoisted part to the tower bottom after unhooking; wherein, hoisted part can include: gear boxes, generators, converters or transformers, etc.; wherein, the fixed point of lifting machine can include: a main shaft, a base, a tower drum or a tower cap and the like; wherein the length of the second set of ropes 19 is provided with a predetermined margin for ensuring that the hoisted part is not loaded when being hoisted by the first set of ropes 14.

In some embodiments, a wind turbine generator system tower top self-hanging device further comprises: the rotating tool is used for enabling a rotating ring of a yaw support of the wind generating set to rotate by 60-120 degrees; and the mounting tool is used for assembling the support 5, the crane boom 6, the translation trolley 7, the slewing bearing 8, the tower cap 9, the balance arm 10, the trolley hook 11, the crane hook 12, the first set of ropes 14, the second set of ropes 19 and the pulley 15 according to the connection relationship among the components after the support 5, the crane boom 6, the translation trolley 7, the slewing bearing 8, the tower cap 9, the balance arm 10, the trolley hook 11, the crane hook 12, the first set of ropes 14, the second set of ropes 19, the pulley 15, the winch 13 and the hoist are conveyed into the cabin 2 through the hoist or the automobile crane in the cabin 2, so as to obtain the tower top self-hoisting device of the wind generating set.

Referring to fig. 4, the working principle and the working process of the tower top self-hoisting device of the wind generating set comprise the following steps:

s1, the support frame 5, the crane boom 6, the translation trolley 7, the slewing bearing 8, the tower cap 9, the balance arm 10, the trolley hook 11, the crane hook 12, the first set of ropes 14, the second set of ropes 19 and the pulley 15 are transported to the interior of the nacelle 2 by a hoist or a transport device or a truck crane inside the tower 1.

S2, assembling the self-hoisting device by using an installation tool such as but not limited to a truck crane according to the connection relation, and obtaining the tower top self-hoisting device of the wind generating set in the embodiment of the invention after assembling.

And S3, moving the translation trolley 7 to the position above the part to be hoisted along the crane arm 6, wherein the part to be hoisted is mainly a gear box 16, a generator 17, a converter or a transformer and the like.

S4, hooking the hoisted part by using the trolley lifting hook 11, connecting one end of the first set of ropes 14 with the trolley lifting hook 11, and connecting the other end with a hoisting machine in the cabin 2, wherein the fixed point of the hoisting machine can be a main shaft, the base 3, the tower 1 or other fixed parts of the tower cap 9.

S5, hooking the hoisted part by the hoisting hook 12, connecting the hoisting hook 12 with the winch 13 at the bottom of the tower by using the second set of ropes 19, and keeping a certain margin for the length of the second set of ropes 19 to ensure that the second set of ropes 19 do not bear load when the hoisted part is lifted next. Specifically, the trolley lifting hook 11 lifts the lifted part and then conveys the lifted part to the outside of the engine room by utilizing the translation of the translation trolley 7; the lifting hook 12 is connected with a winch 13, and the trolley lifting hook 11 needs to be unhooked before being conveyed to the tower bottom, so that the lifted part is completely hooked by the lifting hook 12.

S6, the translating carriage 7 is fixed on the crane arm 6 by a fixing part such as but not limited to a locking pin, and can not move freely, and the translating carriage acts as a fixed pivot of the second set of ropes 19, and keeps a fixed state during the transportation of the hoisted part from the outside of the nacelle to the bottom of the tower.

And S7, hoisting the hoisted part to a certain height by using a hoist, wherein the bottom of the hoisted part is at least higher than the top end of the cabin cover by a certain distance, and the hoist needs to provide power to overcome at least half of the gravity of the hoisted part due to the use of a pulley block (comprising a movable pulley and a fixed pulley).

And S8, turning the rotating ring of the yaw slewing bearing by 60-120 degrees, preferably 90 degrees by using tools such as jiggers, and the lifted part should be completely positioned outside the engine room. The second set of ropes 19 connecting the lifting hook 12 to the tower bottom hoist 13 is not tensioned during the above process, so that the second set of ropes 19 does not damage the nacelle cover or other parts.

S9, starting the hoist 13 to hoist the hoisted part for a distance, wherein the second set of ropes 19 gradually changes from a nearly natural state to a tensioned state, and the main load-bearing part also gradually changes from the trolley hook 11 and the connected first set of ropes 14 to the hoisting hook 12 and the connected second set of ropes 19. After the trolley hook 11 and the associated first set of ropes 14 are almost unloaded, the trolley hook 11 is unhooked.

S10, and then the hoisted component is lowered by the hoist 13.

Finally the new component to be replaced is hoisted to the interior of the nacelle in a similar way as described above.

In the description of the present invention, it should be noted that the terms "upper, lower, inner and outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms first, second, or third are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The terms "mounted, connected and connected" in the present invention are to be understood broadly, unless otherwise explicitly specified or limited, for example: can be fixedly connected, detachably connected or integrally connected; they may be mechanically, electrically, or directly connected, or indirectly connected through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

While the invention 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 invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides a wind generating set top of tower is from hoisting apparatus which characterized by: the top of the tower is from hoisting device includes: the device comprises a support, a crane boom, a translation trolley, a slewing bearing, a tower cap, a balance arm, a trolley lifting hook, a winch, a hoister, a first set of ropes, a second set of ropes and a pulley;

the bottom end of the support is connected with a base of the wind generating set, the top end of the support is connected with a fixed ring of the slewing bearing, a rotating ring of the slewing bearing is connected with the tower cap, and the balance arm and the crane arm are respectively connected with the tower cap;

the crane boom is provided with a track, and the translation trolley can horizontally move on the crane boom along the track;

the first set of ropes is wound around the pulley on the translation trolley to be connected with a hoist in the cabin and the trolley hook;

pulleys are arranged on the tower cap and the balance arm, and the second set of ropes bypasses the pulleys to be connected with the hoisting hook and the winch at the bottom of the tower.

2. The tower top self-lifting device of the wind generating set according to claim 1, wherein: the crane boom is connected with the tower cap, and a pull rod or a pull rope is arranged between the balance boom and the tower cap for connection.

3. The tower top self-lifting device of the wind generating set according to claim 1, wherein: the lifting machine is used for conveying the support, the crane boom, the translation trolley, the slewing bearing, the tower cap, the balance arm, the trolley lifting hook and the lifting hook to the interior of the cabin.

4. The tower top self-lifting device of the wind generating set according to any one of claims 1 to 3, characterized in that:

the hoisting hook is used for hooking the hoisted part;

5. The tower top self-lifting device of the wind generating set according to claim 1, wherein: the winch is fixedly connected to the base of the wind generating set through a connecting piece; the base is arranged in the cabin of the wind generating set.

6. The tower top self-lifting device of the wind generating set according to claim 1, wherein:

the top of the engine room is detachably provided with an engine room cover body; alternatively, the nacelle roof is provided with a nacelle cover that can be moved along the nacelle roof.

7. The tower top self-lifting device of the wind generating set according to claim 1, further comprising:

and the mounting tool is used for assembling the support, the cargo boom, the translation trolley, the slewing bearing, the tower cap, the balance arm, the trolley lifting hook, the first set of rope, the second set of rope and the pulley according to the connection relation among all the parts after the support, the cargo boom, the translation trolley, the slewing bearing, the tower cap, the balance arm, the trolley lifting hook, the first set of rope, the second set of rope, the pulley, the winch and the lifting machine are conveyed into the cabin through the lifting machine or the automobile crane in the cabin, so that the tower top self-lifting device of the wind generating set is obtained.

8. The tower top self-lifting device of the wind generating set according to claim 1, wherein:

the top of the tower cap is provided with a pulley;

the upper surface of the balance arm is provided with a pulley;

and the top of the translation trolley is provided with a pulley.

9. A hoisting method of a wind generating set tower top self-hoisting device, which is characterized in that the method is based on the wind generating set tower top self-hoisting device of any one of claims 1 to 8, and the hoisting method comprises the following steps:

s1, conveying the support, the crane boom, the translation trolley, the slewing bearing, the tower cap, the balance arm, the trolley hook, the crane hook, the first set of ropes, the second set of ropes and the pulley to the interior of the cabin through a hoist or an automobile crane in the cabin;

s2, assembling the support, the crane boom, the translation trolley, the slewing bearing, the tower cap, the balance arm, the trolley hook, the crane hook, the first set of rope, the second set of rope and the pulley by using an installation tool to obtain a tower top self-lifting device of the wind generating set;

s3, moving the translation trolley to the position above the hoisted part;

s6, fixing the translation trolley on the crane arm by using a fixing piece;

s7, hoisting the hoisted component to a preset height by using a hoist, wherein the bottom of the hoisted component is at least higher than the top end of the cabin cover by a preset distance, and the power provided by the hoist at least overcomes half of the gravity of the hoisted component;

s8, rotating a rotating ring of the yaw support by a preset angle by using a rotating tool, so that the hoisted part is completely positioned outside the engine room;

and S10, lowering the hoisted part to the bottom of the tower by using a winch.

10. The hoisting method of the tower top self-hoisting system of the wind generating set according to claim 9, characterized in that:

the hoisted member includes: a gearbox, generator, converter or transformer;

the fixed point of lifting machine includes: a main shaft, a base, a tower or a tower cap;

the length of the second set of ropes is reserved with a preset allowance for ensuring that the hoisted part is not loaded when being hoisted by the first set of ropes;

the preset angle of the rotating ring is 60-120 degrees.