CN218560920U - Maintenance crane for offshore wind generating set - Google Patents

Abstract

The utility model discloses an offshore wind generating set maintenance hoist, including telescopic pylon, be equipped with a direction staple bolt respectively at the bottom festival of telescopic pylon and top festival at least, be equipped with flexible staple bolt at the top festival of telescopic pylon. The utility model discloses can be applied to the boats and ships that the load is low to can be applied to multiple model aerogenerator's maintenance. The design of the self-climbing crane is available in the countries such as Germany, denmark and the like, but in the crane climbing scheme, the crane climbing component is designed in advance when the wind driven generator tower is produced so as to achieve the purpose of self-climbing of the crane in the later maintenance. The scheme is only specific to the offshore wind driven generator tower, is high in limitation and cannot be applied to maintenance schemes of various offshore wind driven generators produced by different wind turbine plants in a large scale.

Description

Maintenance crane for offshore wind generating set

Technical Field

The utility model relates to a novel marine wind generating set maintenance hoist, wind generating set cost of maintenance that can significantly reduce belongs to hoist research and development technical field.

Background

With the continuous development of the field of offshore wind power, the maintenance operation of offshore wind power is also increased rapidly. Unlike onshore wind power, offshore wind power maintenance techniques are more complex. The operation and maintenance ship is an important transportation operation and maintenance tool for construction, operation and maintenance of offshore wind farms. At present, a special marine wind power maintenance ship at home adopts a mode of piling under sea and then operating by a crane after the ship is fixed. Compared with the development and construction of the sudden and violent offshore wind power, the requirement of the special offshore wind power maintenance ship is increased. According to the calculation of DNV, each offshore wind turbine unit has up to 40 shutdown faults per year on average, the overall fault rate is about 3%, and about 1 professional maintenance ship is needed for about every 30 offshore wind turbines.

When the method is applied to replacement of large parts (gear boxes, blades, generators and the like) of offshore wind generating sets, large floating cranes or standing pile ships special for wind power are needed, the cost is high, and the construction, operation and maintenance cost is high. The number of travel days of the existing special large floating crane or pile standing ship can be increased along with the increase of offshore distance and the development of offshore wind power in southern areas with worse weather. The specialization of the wind power operation and maintenance ship is a future trend. According to the BTM offshore operation and maintenance cost composition, the operation and maintenance cost of offshore wind power accounts for about 20% of the total cost, and the cost related to operation and maintenance of ships accounts for about 20% of the operation and maintenance cost. From the actual situation at the present stage, a mode which can be better applied to the field of offshore wind power maintenance is designed, and is a necessary trend of the development of the offshore wind power industry.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: when the method is applied to replacement of large parts of an offshore wind generating set, a large floating crane or a standing pile ship special for wind power is needed, and the cost is high.

In order to solve the technical problem, the technical scheme of the utility model is to provide a maintenance crane for an offshore wind generating set, which is characterized by comprising a telescopic tower column, wherein the bottom of the telescopic tower column is provided with a buffer;

at least the bottom section and the top section of the telescopic tower column are respectively provided with a guide hoop capable of being switched between a closed state and an open state, when the guide hoop is in the open state, a guide hoop opening of the guide hoop is exposed outside, and when the guide hoop is in the closed state, the guide hoop opening is closed; the guide hoop in a closed state surrounds the outside of the wind driven generator tower, the guide hoop is provided with a hydraulic system, and the extrusion force of the guide hoop on the wind driven generator tower is always kept at a set value through the hydraulic system; the guide hoop plays a role in guiding when the telescopic tower column is in place, placed and lifted;

the top section of the telescopic tower column is provided with a flexible hoop capable of being switched between a closed state and an open state, when the flexible hoop is in the open state, a flexible hoop opening of the flexible hoop is exposed outside, and when the flexible hoop is in the closed state, the flexible hoop opening is closed; the flexible hoop in a closed state surrounds the outside of the wind driven generator tower, the flexible hoop has variable roundness, and when the roundness of the flexible hoop is the maximum designed roundness, no friction force exists between the flexible hoop and the wind driven generator tower; the roundness of the flexible hoop is reduced to be attached to the wind driven generator tower until enough friction force is generated between the flexible hoop and the wind driven generator tower so as to support the operation of the maintenance crane of the offshore wind driven generator set;

the top end of the top section of the telescopic tower column is provided with an extension arm and a balance arm, and the balance arm is provided with a balance weight;

the tail rope synchronous rotating device is installed on the bottom section of the telescopic tower column, and the tail rope led out from the extending arm is connected with the tail rope synchronous rotating device.

Preferably, two guide anchor ears are arranged on the bottom section and the top section of the telescopic tower column respectively; in the process of putting the telescopic tower column in place and putting the telescopic tower column down, the two guide hoops play a role of guiding at the same time; in the jacking process of the telescopic tower column, only the guide hoop positioned on the top section plays a role in guiding.

Preferably, the guide hoop comprises a guide hoop bracket fixed on the telescopic tower column; the hydraulic system is arranged on the guide hoop support and comprises a hydraulic subsystem I and a hydraulic subsystem II; the hydraulic subsystem I and the hydraulic subsystem II are respectively connected to one ends of the hoop bracket I and the hoop bracket II; a gap is formed between the other ends of the first hoop bracket and the second hoop bracket, and the gap is a guide hoop opening; the other end of the hoop bracket I and the other end of the hoop bracket II are also provided with a locking device driven by an opening and closing oil cylinder, and the locking device is driven by the opening and closing oil cylinder to open or close a gap between the hoop bracket I and the other end of the hoop bracket II, so that the state of the guide hoop is switched between an open state and a closed state; the locking device and the hydraulic subsystem are simultaneously tensioned, so that the hoop bracket I and the hoop bracket II are deformed, and the deformed hoop bracket I and the deformed hoop bracket II extrude the wind driven generator tower at a set pressure, so that the hoop bracket I and the hoop bracket II can always surround the wind driven generator tower under the condition that the diameter of the wind driven generator tower is changed; and guide wheels are arranged on the inner sides of the hoop bracket I and the hoop bracket II, and the guide wheels are tightly attached to the wind driven generator tower after the wind driven generator tower is encircled by the guide hoops, so that a guide effect is achieved.

Preferably, the flexible hoop comprises a flexible hoop support with a flexible hoop opening, and the flexible hoop support is fixedly connected with the telescopic tower column; the flexible hoop support is connected with the hoop bracket which can be opened and closed, when the hoop bracket is opened, the opening of the flexible hoop is exposed outside, and the flexible hoop is in an open state; when the hoop bracket is closed, the opening of the flexible hoop is closed, and the flexible hoop is in a closed state;

the flexible hoop support is provided with a jacking oil cylinder, and the jacking oil cylinder is connected with the guide frame; one end of each of the two support rods is hinged with the guide frame, the other end of each of the two support rods is connected with two ends of the short half-cycle elastic hoop, and the jacking oil cylinder drives the short half-cycle elastic hoop to extend and shorten through the guide frame and the support rods;

the inner side of the hoop bracket is provided with a long half-circumference elastic hoop, the long half-circumference elastic hoop is fixedly connected with a telescopic supporting rod, and the telescopic supporting rod is fixed on the hoop bracket; one end of the long half-circumference elastic hoop is connected with the telescopic rod of the first tensioning oil cylinder, and the other end of the long half-circumference elastic hoop is detachably connected with the telescopic rod of the second tensioning oil cylinder through a hook structure; the long half-cycle elastic hoop is extended and shortened through the tensioning oil cylinder I and the tensioning oil cylinder II;

the short half-cycle elastic hoop and the long half-cycle elastic hoop are matched to form an equivalent whole circle surrounding the wind driven generator tower, and after the short half-cycle elastic hoop and the long half-cycle elastic hoop are correspondingly extended and shortened, the roundness of the equivalent whole circle is changed.

Preferably, the cylinder bodies of the first tensioning cylinder and the second tensioning cylinder are fixed on the flexible hoop support and hinged with the flexible hoop support; two ends of the return tension spring are respectively connected and fixed with the cylinder body of the tensioning oil cylinder I or the tensioning oil cylinder II and the flexible hoop bracket; and a stop block is arranged beside the cylinder body of the tensioning cylinder II and used for limiting the swing amplitude of the tensioning cylinder II.

Preferably, the hook structure comprises a drag hook, a rotating shaft is arranged at the end part of a telescopic rod of the tensioning oil cylinder II, and the drag hook is sleeved on the rotating shaft through a torsion spring, so that the drag hook can rotate around the rotating shaft; the end part of the long semi-circle elastic hoop is provided with a hoop shaft pin which can be hooked by the draw hook; the draw hook is fixed with a top block which is matched with a stop pin fixed on the flexible hoop support so as to rotate the draw hook.

Preferably, the end of the long semi-circle elastic hoop is connected with the hoop bracket through a releasable and clamped hoop fixing device.

Preferably, the short half-cycle elastic hoop and the long half-cycle elastic hoop have the same structure and comprise a plurality of hoop blocks which are connected in series through a steel wire rope, and two adjacent hoop blocks are mutually locked through an elastic locking mechanism; after the first tensioning oil cylinder and the second tensioning oil cylinder or the jacking oil cylinder pulls the steel wire rope, a gap delta is formed between every two adjacent hoop blocks by using the elastic locking mechanism, and the gap delta is changed under the action of the first tensioning oil cylinder and the second tensioning oil cylinder or the jacking oil cylinder, so that the aim of changing the roundness is fulfilled.

Preferably, each hoop block is provided with rubber on one side facing the wind driven generator tower.

Preferably, the elastic locking mechanism comprises a bolt, a spherical washer, a spring and a nut; the bolts penetrate through the two adjacent hoop blocks and are locked by the nuts; a spherical washer and a spring are sleeved outside the bolt; the spherical washer is abutted against the hoop block; the spring is positioned between the spherical washer and the nut, and two ends of the spring are respectively abutted against the spherical washer and the nut.

The utility model provides a novel marine wind generating set maintenance hoist breaks the mode that traditional large-scale floating crane or the stake ship of standing hoisted, can be applied to the boats and ships that the load is low to can be applied to multiple model aerogenerator's maintenance. The design of the self-climbing crane is available in the countries such as Germany, denmark and the like, but in the crane climbing scheme, the crane climbing component is designed in advance when the wind driven generator tower is produced so as to achieve the purpose of self-climbing of the crane in the later maintenance. The scheme is only specific to the offshore wind driven generator tower, is high in limitation and cannot be applied to maintenance schemes of various offshore wind driven generators produced by different wind turbine plants in a large scale.

The utility model relates to a self-elevating crane. The utility model discloses a hoist breaks traditional hoist mode of climbing, adopts telescopic tower column, and the jacking process can not need the installation tower festival. The utility model discloses use aerogenerator door opening as supporting the fixed point, attach to the aerogenerator pylon through the staple bolt and carry out from climbing, climb and carry out the jack-up operation behind the take the altitude. The utility model provides a multiple aerogenerator models that the hoist can be applied to different fan factory productions and makes to can finish the hoist installation on land, whole transportation, integral hoisting. Adopt telescopic tower section and staple bolt to adhere to the mode of climbing, simple structure, the whole weight of hoist reduces greatly, also greatly reduced to its required transport ship, hoist and mount ship's load requirement, can promote offshore wind power maintenance convenience, reduce offshore wind power fortune maintenance's expense to a great extent.

Drawings

Fig. 1A is a schematic general structural diagram (front view) of a maintenance crane for an offshore wind turbine generator system according to the present invention;

fig. 1B is a schematic structural view (front view) of the offshore wind turbine generator system maintenance crane according to the present invention after being lifted in place;

fig. 1C is a schematic structural view (top view) of the offshore wind turbine generator system maintenance crane according to the present invention after being lifted in place;

FIG. 2 is a partial schematic view of a cushioning device;

fig. 3A is a schematic structural view of the guide hoop in a closed state;

FIG. 3B is an enlarged view of a portion A of FIG. 3A;

fig. 4A is a schematic structural diagram (closed state) of the flexible hoop;

fig. 4B is a schematic structural view (open state) of the flexible hoop;

FIG. 5 is a schematic view of a hook structure;

FIG. 6 is a schematic structural view of the hoop fixing device;

FIG. 7 is a partial schematic view of portion C of FIG. 4A;

FIG. 8A is a schematic view of the elastic anchor ear when not under tension;

FIG. 8B isbase:Sub>A cross-sectional view taken along line A-A of FIG. 8A;

fig. 9 is a schematic structural view of the elastic hoop after being subjected to tension;

fig. 10 is a schematic structural view of the elastic locking mechanism.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

As shown in fig. 1A to fig. 1C, the utility model discloses an offshore wind turbine generator system maintenance crane includes telescopic tower 3. Because marine operation wave fluctuation strikes great, the floating crane handling the utility model provides a speed should not be too slow down to transfer after the maintenance hoist targets in place, consequently installs buffer 1 in 3 bottoms of telescopic tower column, as shown in fig. 2.

A guiding hoop 2 is respectively arranged on the bottom section and the top section of the telescopic tower column 3, and the state of the guiding hoop 2 can be switched between a closed state and an open state. The guide hoop 2 in the opening state is provided with a guide hoop opening, after the guide hoop opening is aligned with the wind driven generator tower, the wind driven generator tower is placed in the guide hoop 2, finally, the state of the guide hoop 2 is switched to the closing state, and the guide hoop 2 surrounds the wind driven generator tower while the guide hoop opening is closed. The utility model provides a when the maintenance hoist takes one's place and transfers, two direction staple bolts 2 play the guide effect simultaneously. The utility model provides an in the maintenance hoist jacking process, only install the direction staple bolt 2 at 3 top festivals of telescopic tower post and play the guide effect. Because the wind driven generator tower is in a conical structure, the diameter of the wind driven generator tower is gradually reduced from bottom to top, and the guide hoop 2 positioned at the top section of the telescopic tower column 3 always encircles the wind driven generator tower under the action of a hydraulic system, so that the telescopic tower column 3 is parallel to the wind driven generator tower.

As shown in fig. 3A and 3B, the guiding anchor ear 2 includes a guiding anchor ear support 2-2, and the guiding anchor ear support 2-2 is provided with a mounting hole for mounting the guiding anchor ear on the telescopic tower 3. The guide hoop support 2-2 is provided with a front side hydraulic subsystem and a rear side hydraulic subsystem, and the front side hydraulic subsystem and the rear side hydraulic subsystem are respectively connected with one end of the front side hoop bracket 2-3-1 and one end of the rear side hoop bracket 2-3-2. A gap is formed between the other end of the front hoop bracket 2-3-1 and the other end of the rear hoop bracket 2-3-2, and the gap is a guide hoop opening. The other ends of the front hoop bracket 2-3-1 and the rear hoop bracket 2-3-2 are also provided with locking devices 2-4 driven by opening and closing oil cylinders 2-7. The locking device 2-4 is driven by the opening and closing oil cylinder 2-7 to open or close a gap between the front hoop bracket 2-3-1 and the other end of the rear hoop bracket 2-3-2, so that the guide hoop 2 is switched between an open state and a closed state. In the embodiment, the rear end of the locking device 2-4 is hinged with the rear hoop bracket 2-3-2, and the opening and closing oil cylinder 2-7 is also fixed on the rear hoop bracket 2-3-2. The output end of the opening and closing oil cylinder 2-7 is connected with the locking device 2-4. The front end of the locking device 2-4 is driven by the opening and closing oil cylinder 2-7 to be locked with the hoop bracket 2-3-1 at the front side, so that the guide hoop 2 is in a closed state; meanwhile, the front end of the locking device 2-4 is driven by the opening and closing oil cylinder 2-7 to be separated from the front hoop bracket 2-3-1, so that the guide hoop 2 is in an opening state. The locking device 2-4, the front side hydraulic subsystem and the rear side hydraulic subsystem are simultaneously tensioned, so that the front side hoop bracket 2-3-1 and the rear side hoop bracket 2-3-2 are deformed. The deformed front hoop bracket 2-3-1 and the deformed rear hoop bracket 2-3-2 squeeze the wind driven generator tower frame with set pressure, so that the front hoop bracket 2-3-1 and the rear hoop bracket 2-3-2 can always encircle the outside of the wind driven generator tower frame under the condition that the diameter of the wind driven generator tower frame changes. The guide wheels 2-5 are arranged on the inner sides of the front hoop bracket 2-3-1 and the rear hoop bracket 2-3-2, and after the guide hoop 2 encircles the wind driven generator tower, the guide wheels 2-5 are tightly attached to the wind driven generator tower, so that a guide effect is achieved. In the embodiment, the front side hydraulic subsystem and the rear side hydraulic subsystem have the same structure and comprise hydraulic cylinders 2-1 and connecting rod devices 2-6, wherein the hydraulic cylinders 2-1 are fixed on the guide hoop supports 2-2, and the front side hoop brackets 2-3-1 or the rear side hoop brackets 2-3-2 are driven to deform through the connecting rod devices 2-6.

And a flexible anchor ear 4 is also arranged at the top section of the telescopic tower column 3. The state of the flexible hoop 4 can be switched between a closed state and an open state. The flexible hoop 4 in the opening state is provided with a flexible hoop opening, after the flexible hoop opening is aligned with the wind driven generator tower, the wind driven generator tower is placed in the flexible hoop 4, finally, the state of the flexible hoop 4 is switched to the closing state, and the flexible hoop 4 surrounds the wind driven generator tower while the flexible hoop opening is closed. The utility model provides a maintenance hoist takes one's place and transfers and the jacking in-process, flexible staple bolt 4 keeps maximum design circularity, does not have frictional force between flexible staple bolt 4 and the aerogenerator pylon. The roundness of the flexible hoop 4 is reduced to be attached to the wind driven generator tower until enough friction force is generated between the flexible hoop and the wind driven generator tower so as to support the operation of a maintenance crane.

As shown in fig. 4A and 4B, the flexible anchor ear 4 includes a flexible anchor ear support 4-1 having a flexible anchor ear opening, and the flexible anchor ear support 4-1 has a mounting hole for mounting it on the telescopic tower 3. The flexible hoop support 4-1 is connected with the openable flexible hoop bracket 4-12, and the opening and closing oil cylinder 4-13 drives the flexible hoop bracket 4-12 to open and close. When the flexible hoop brackets 4-12 are opened, the openings of the flexible hoops are exposed outside, and the flexible hoops 4 are in an opened state; when the flexible hoop brackets 4-12 are closed, the flexible hoop openings are closed, and the flexible hoops 4 are in a closed state.

The flexible hoop support 4-1 is provided with a jacking oil cylinder 4-2, and the jacking oil cylinder 4-2 is connected with the guide frame 4-4. One end of each of the two support rods 4-24 is hinged with the guide frame 4-4, and the other end is respectively connected with the two ends of the short half-cycle elastic hoop 4-9. The jacking oil cylinder 4-2 drives the short half-cycle elastic hoop 4-9 to extend and shorten through the guide frame 4-4 and the support rod 4-24.

The inner side of the flexible hoop bracket 4-12 is provided with a long semi-circle elastic hoop 4-10, the long semi-circle elastic hoop 4-10 is fixedly connected with a telescopic supporting rod 4-11, and the telescopic supporting rod 4-11 is positioned at the center of the long semi-circle elastic hoop 4-10. The telescopic support rod 4-11 is fixed on the flexible anchor ear bracket 4-12. One end of the long half-cycle elastic hoop 4-10 is connected with the telescopic rod of the first tensioning oil cylinder 4-3-1, and the other end of the long half-cycle elastic hoop 4-10 is detachably connected with the telescopic rod of the second tensioning oil cylinder 4-3-2 through a hook structure. The long half-cycle elastic hoop 4-10 is extended and shortened through the tensioning oil cylinder I4-3-1 and the tensioning oil cylinder II 4-3-2. The cylinder bodies of the first tensioning oil cylinder 4-3-1 and the second tensioning oil cylinder 4-3-2 are fixed on the flexible hoop support 4-1 and hinged with the flexible hoop support 4-1. Two ends of the return tension spring 4-5 are respectively connected and fixed with the cylinder body of the first tensioning oil cylinder 4-3-1 or the second tensioning oil cylinder 4-3-2 and the flexible hoop support 4-1, so that the first tensioning oil cylinder 4-3-1 and the second tensioning oil cylinder 4-3-2 can be quickly reset after swinging. And a stop block 4-6 is arranged beside the cylinder body of the tensioning cylinder II 4-3-2 and used for limiting the swing amplitude of the tensioning cylinder II 4-3-2.

The short half-cycle elastic hoop 4-9 is matched with the long half-cycle elastic hoop 4-10 to form an equivalent whole circle encircling the wind driven generator tower, and after the short half-cycle elastic hoop 4-9 and the long half-cycle elastic hoop 4-10 are correspondingly extended and shortened, the roundness of the equivalent whole circle is changed.

Referring to fig. 5, the hook structure comprises a drag hook 4-7, a rotating shaft is arranged at the end part of a telescopic rod of a tensioning oil cylinder II 4-3-2, and the drag hook 4-7 is sleeved on the rotating shaft through a torsion spring 4-22, so that the drag hook 4-7 can rotate around the rotating shaft. The end part of the long semi-circle elastic hoop 4-10 is provided with a hoop shaft pin 4-23 which can be hooked by the draw hook 4-7. An ejector block 4-25 is fixed on the draw hook 4-7, and the ejector block 4-25 is matched with a stop pin 4-21 fixed on the flexible hoop support 4-1 so as to rotate the draw hook 4-7. When the end part of the long half-cycle elastic hoop 4-10 needs to be combined with the tensioning oil cylinder II 4-3-2, the telescopic rod of the tensioning oil cylinder II 4-3-2 extends until the top block 4-25 is abutted against the stop pin 4-21, and at the moment, the telescopic rod of the tensioning oil cylinder II 4-3-2 continues to extend by a micro amount delta, so that the top block 4-25 drives the draw hook 4-7 to rotate by an angle alpha. And then, the telescopic rod of the tensioning oil cylinder II 4-3-2 contracts by a trace delta, and the hoop shaft pin 4-23 is hooked after the drag hook 4-7 rotates by a rotation angle alpha. When the end part of the long half-cycle elastic hoop 4-10 needs to be separated from the tensioning oil cylinder II 4-3-2, the telescopic rod of the tensioning oil cylinder II 4-3-2 extends by a slight amount delta, so that the top block 4-25 drives the draw hook 4-7 to rotate by an angle alpha, and at the moment, the flexible hoop bracket 4-12 is opened, so that the end part of the long half-cycle elastic hoop 4-10 is separated from the tensioning oil cylinder II 4-3-2.

Referring to fig. 6, the ends of the long half-cycle resilient hoops 4-10 are connected to the flexible hoop brackets 4-12 by a releasable and clampable hoop fixture 4-8. The hoop fixing devices 4-8 are outsourcing members, and the specific structure thereof is not described in detail. When the flexible hoop bracket 4-12 is opened, the other end of the long half-cycle elastic hoop 4-10 is separated from the telescopic rod of the tensioning oil cylinder II 4-3-2, and at the moment, the hoop fixing device 4-8 clamps the end part of the long half-cycle elastic hoop 4-10. When the flexible hoop bracket 4-12 is closed, the other end of the long half-cycle elastic hoop 4-10 is combined with the telescopic rod of the tensioning oil cylinder II 4-3-2, and at the moment, the hoop fixing device 4-8 loosens the end part of the long half-cycle elastic hoop 4-10.

With reference to fig. 8A, 8B and 9, the short half-cycle elastic hoop 4-9 and the long half-cycle elastic hoop 4-10 have the same structure, and include a plurality of hoop blocks 4-14 connected in series by steel cables 4-15, and two adjacent hoop blocks 4-14 are locked to each other by an elastic locking mechanism. After the first tensioning oil cylinder 4-3-1 and the second tensioning oil cylinder 4-3-2 or the jacking oil cylinder 4-2 pulls the steel wire rope 4-15, a gap delta is formed between two adjacent hoop blocks 4-14 by using the elastic locking mechanism, and the gap delta is changed under the action of the first tensioning oil cylinder 4-3-1, the second tensioning oil cylinder 4-3-2 or the jacking oil cylinder 4-2, so that the aim of changing the roundness is fulfilled.

And rubber 4-16 is arranged on one side of each hoop block 4-14, which faces to the wind driven generator tower, and the friction between the short half-cycle elastic hoop 4-9 or the long half-cycle elastic hoop 4-10 and the wind driven generator tower is increased by utilizing the rubber 4-16.

In this embodiment, the resilient locking mechanism includes a bolt 4-17, a spherical washer 4-18, a spring 4-19, and a nut 4-20. The bolts 4-17 are arranged on the two adjacent hoop blocks 4-14 in a penetrating way and are locked by the nuts 4-20. The bolts 4-17 are sleeved with spherical washers 4-18 and springs 4-19, the spherical washers 4-18 are abutted against the hoop blocks 4-14, the springs 4-19 are positioned between the spherical washers 4-18 and the nuts 4-20, and two ends of the springs 4-19 are abutted against the spherical washers 4-18 and the nuts 4-20 respectively. After the steel wire rope 4-15 is pulled through the tensioning oil cylinder I4-3-1 and the tensioning oil cylinder II 4-3-2 or through the jacking oil cylinder 4-2, the spring 4-19 is stressed and compressed, and therefore the gap delta is formed. When the external force F acting on the steel wire rope 4-15 by the tensioning oil cylinder I4-3-1 and the tensioning oil cylinder II 4-3-2 or the jacking oil cylinder 4-2 is removed, the spring 4-19 is restored to the original shape, the gap delta disappears, and the roundness of the equivalent full circle reaches the maximum designed roundness.

The top end of the top section of the telescopic tower column 3 is provided with a cantilever 5 and a balance arm 9, and the balance arm 9 is provided with a counterweight 7.

Install tail rope synchronous revolution device 6 at telescopic tower 3's end festival, the utility model provides a maintenance hoist jacking back that targets in place, the tail rope 8 that the boom 5 of stretching out was drawn out from links with tail rope synchronous revolution device 6 mutually.

It should be noted that the boom 5, the balance arm 9, the tail rope 8 and the tail rope synchronous rotating device 6 are conventional components well known to those skilled in the art, and will not be described in detail here.

Accomplish on land the utility model provides a maintenance hoist's complete machine installation back will through the transport ship the utility model discloses transport to the particular position. The balance arm 9 of maintenance hoist erects, utilizes the adjustment of counter weight 7 the utility model provides a maintenance hoist's complete machine focus. After the maintenance crane is hoisted by the floating crane, the telescopic tower column 3 is basically vertical, and the telescopic tower column 3 is ensured to be parallel to the center line of the wind driven generator tower. The floating crane lifts the maintenance crane to the wind generating set, the buffer 1 of the maintenance crane is aligned to the tower door opening, the guide hoop 2 and the flexible hoop 4 are both in an open state, and the guide hoop opening of the guide hoop 2 and the flexible hoop opening of the flexible hoop 4 are aligned to the wind generating set tower. After the wind power generator tower is in place, the guide anchor ears 2 are switched to be in a closed state, the extrusion force of the two guide anchor ears 2 on the wind power generator tower reaches a set value through a hydraulic system, the extrusion force of the two guide anchor ears 2 on the wind power generator tower is always kept at the set value, and the two guide anchor ears 2 encircle the wind power generator tower. The floating crane is installed to be slowly hooked, in order to prevent the up-and-down impact caused by wave fluctuation, the floating crane is continuously put down to maintain the crane, the impact force of the maintenance crane is absorbed by the buffer 1, and the buffer 1 is in rigid contact after pressure release. And (3) putting down the balance weight 7, starting jacking the telescopic tower column 3, and gradually reducing the diameter of the guide hoop 2 arranged at the top section of the telescopic tower column 3 along the taper of the wind driven generator tower under the action of a hydraulic system. When the lifting is in place, the flexible hoop 4 is switched to a closed state, and the roundness of the flexible hoop 4 is reduced to be attached to the wind driven generator tower to generate enough friction force between the flexible hoop and the wind driven generator tower so as to support the operation of the maintenance crane. After the balance arm 9 is laid flat, the tail rope 8 is fixed to the tail rope synchronous rotating device 6. The service crane can now be operated.

And the disassembly of the maintenance crane is operated reversely according to the steps.

The utility model provides an offshore wind power unit maintenance hoist's advantage is that simple structure, convenient operation, construction cost are low, and the part that can all kinds of offshore wind power fortune dimension is changed and the maintenance can be applied to the expense that can greatly reduced offshore wind power fortune dimension.

Claims (10)

1. A maintenance crane for an offshore wind generating set is characterized by comprising a telescopic tower column, wherein the bottom of the telescopic tower column is provided with a buffer;

at least a guide hoop capable of being switched between a closed state and an open state is arranged on the bottom section and the top section of the telescopic tower column respectively, when the guide hoop is in the open state, a guide hoop opening of the guide hoop is exposed outside, and when the guide hoop is in the closed state, the guide hoop opening is closed; the guide hoop in a closed state surrounds the outside of the wind driven generator tower, the guide hoop is provided with a hydraulic system, and the extrusion force of the guide hoop on the wind driven generator tower is always kept at a set value through the hydraulic system; the guide hoop plays a role in guiding in the processes of putting the telescopic tower column in place and jacking;

the top section of the telescopic tower column is provided with a flexible hoop capable of being switched between a closed state and an open state, when the flexible hoop is in the open state, the opening of the flexible hoop is exposed outside, and when the flexible hoop is in the closed state, the opening of the flexible hoop is closed; the flexible hoop in a closed state surrounds the wind driven generator tower, the flexible hoop has variable roundness, and when the roundness of the flexible hoop is the maximum designed roundness, no friction force exists between the flexible hoop and the wind driven generator tower; the roundness of the flexible hoop is reduced to be attached to the wind driven generator tower until enough friction force is generated between the flexible hoop and the wind driven generator tower so as to support the operation of the maintenance crane of the offshore wind driven generator set;

the top end of the top section of the telescopic tower column is provided with an extension arm and a balance arm, and the balance arm is provided with a balance weight;

the tail rope synchronous rotating device is installed on the bottom section of the telescopic tower column, and the tail rope led out from the extending arm is connected with the tail rope synchronous rotating device.

2. The maintenance crane for the offshore wind turbine generator system of claim 1, wherein there are two said guiding hoops respectively installed on the bottom section and the top section of said telescopic tower column; in the process of putting the telescopic tower column in place and putting the telescopic tower column down, the two guide hoops simultaneously play a role in guiding; in the jacking process of the telescopic tower column, only the guide hoop positioned on the top section plays a role in guiding.

3. The offshore wind turbine maintenance crane of claim 1, wherein the guide hoop comprises a guide hoop bracket fixed to the telescopic tower column; the hydraulic system is arranged on the guide hoop support and comprises a hydraulic subsystem I and a hydraulic subsystem II; the hydraulic subsystem I and the hydraulic subsystem II are respectively connected to one ends of the hoop bracket I and the hoop bracket II; a gap is formed between the other ends of the first hoop bracket and the second hoop bracket, and the gap is a guide hoop opening; the other ends of the first hoop bracket and the second hoop bracket are also provided with locking devices driven by the opening and closing oil cylinders, and the locking devices are driven by the opening and closing oil cylinders to open or close a gap between the first hoop bracket and the other end of the second hoop bracket, so that the state of the guide hoop is switched between an open state and a closed state; the locking device and the hydraulic subsystem are simultaneously tensioned, so that the hoop bracket I and the hoop bracket II are deformed, and the deformed hoop bracket I and the deformed hoop bracket II extrude the wind driven generator tower with set pressure, so that the hoop bracket I and the hoop bracket II can always encircle the outside of the wind driven generator tower under the condition that the diameter of the wind driven generator tower is changed; and guide wheels 2 are arranged on the inner sides of the hoop bracket I and the hoop bracket II, and after the wind driven generator tower is embraced by the guide hoops, the guide wheels are tightly attached to the wind driven generator tower, so that a guide effect is achieved.

4. The offshore wind turbine maintenance crane of claim 1, wherein the flexible hoop includes a flexible hoop support having a flexible hoop opening, the flexible hoop support being fixedly attached to the telescoping tower; the flexible hoop support is connected with the hoop bracket which can be opened and closed, when the hoop bracket is opened, the opening of the flexible hoop is exposed outside, and the flexible hoop is in an open state; when the anchor ear bracket is closed, the opening of the flexible anchor ear is closed, and the flexible anchor ear is in a closed state;

the flexible hoop support is provided with a jacking oil cylinder, and the jacking oil cylinder is connected with the guide frame; one end of each of the two support rods is hinged with the guide frame, the other end of each of the two support rods is respectively connected with two ends of the short half-cycle elastic hoop, and the jacking oil cylinder drives the short half-cycle elastic hoop to extend and shorten through the guide frame and the support rods;

the inner side of the hoop bracket is provided with a long half-circumference elastic hoop, the long half-circumference elastic hoop is fixedly connected with a telescopic supporting rod, and the telescopic supporting rod is fixed on the hoop bracket; one end of the long half-circumference elastic hoop is connected with the telescopic rod of the first tensioning oil cylinder, and the other end of the long half-circumference elastic hoop is detachably connected with the telescopic rod of the second tensioning oil cylinder through a hook structure; the long half-cycle elastic hoop is extended and shortened through the tensioning oil cylinder I and the tensioning oil cylinder II;

the short half-cycle elastic hoop is matched with the long half-cycle elastic hoop to form an equivalent whole circle encircling the wind driven generator tower, and after the short half-cycle elastic hoop and the long half-cycle elastic hoop are correspondingly extended and shortened, the roundness of the equivalent whole circle is changed.

5. The offshore wind turbine unit maintenance crane of claim 4, wherein the first tensioning cylinder and the second tensioning cylinder are fixed to the flexible hoop support and hinged to the flexible hoop support; two ends of the return tension spring are respectively connected and fixed with the cylinder body of the tensioning oil cylinder I or the tensioning oil cylinder II and the flexible hoop bracket; and a stop block is arranged beside the cylinder body of the tensioning cylinder II and used for limiting the swing amplitude of the tensioning cylinder II.

6. The offshore wind turbine generator system maintenance crane of claim 4, wherein the hook structure comprises a drag hook, the end of the telescopic rod of the second tensioning cylinder is provided with a rotating shaft, and the drag hook is sleeved on the rotating shaft through a torsion spring, so that the drag hook can rotate around the rotating shaft; the end part of the long semi-circle elastic hoop is provided with a hoop shaft pin which can be hooked by the draw hook; an ejector block is fixed on the draw hook, and the ejector block is matched with a stop pin fixed on the flexible hoop support, so that the draw hook rotates.

7. The offshore wind turbine maintenance crane of claim 4, wherein the ends of the long half-cycle elastic hoop are connected to the hoop brackets by a releasable and clamping hoop fixture.

8. The offshore wind turbine generator system maintenance crane of claim 4, wherein the short half-cycle elastic hoop and the long half-cycle elastic hoop are identical in structure and comprise a plurality of hoop blocks connected in series through steel wire ropes, and two adjacent hoop blocks are locked with each other through an elastic locking mechanism; after the steel wire rope is pulled through the tensioning oil cylinder I and the tensioning oil cylinder II or through the jacking oil cylinder, a gap delta is formed between two adjacent hoop blocks by utilizing the elastic locking mechanism, and the gap delta is changed under the action of the tensioning oil cylinder I and the tensioning oil cylinder II or the jacking oil cylinder, so that the aim of changing the roundness is fulfilled.

9. The offshore wind turbine maintenance crane of claim 8, wherein each of the hoop blocks is provided with rubber on a side facing the wind turbine tower.

10. The offshore wind turbine maintenance crane of claim 8, wherein the resilient locking mechanism comprises a bolt, a spherical washer, a spring, and a nut; the bolts penetrate through the two adjacent hoop blocks and are locked through the nuts; a spherical washer and a spring are sleeved outside the bolt; the spherical washer is abutted against the hoop block; the spring is positioned between the spherical washer and the nut, and two ends of the spring are respectively abutted against the spherical washer and the nut.

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