CN112682403A

CN112682403A - Heating maintenance device, heating maintenance system, maintenance method, and blade lengthening method

Info

Publication number: CN112682403A
Application number: CN201910987094.9A
Authority: CN
Inventors: 高正阳; 王盼涛
Original assignee: Beijing Goldwind Smart Energy Service Co Ltd
Current assignee: Beijing Goldwind Smart Energy Service Co Ltd
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2021-04-20
Anticipated expiration: 2039-10-17
Also published as: CN112682403B

Abstract

The invention relates to a heating maintenance device, a heating maintenance system, a maintenance method and a blade lengthening method, wherein the heating maintenance device comprises: the heating cabin comprises a cylindrical wall body, a first accommodating cavity is formed by enclosing the cylindrical wall body, and the heating cabin is sleeved on the peripheral surface of the long shaft assembly through the cylindrical wall body; the heating component is connected to the cylindrical wall body and arranged towards the first accommodating cavity; the locking assembly is connected to the heating cabin, and the heating cabin is detachably connected to the long shaft assembly through the locking assembly. The heating assembly heating maintenance device provided by the embodiment of the invention can automatically realize heating maintenance of the long shaft assemblies, reduce the labor cost, shorten the heating maintenance time of the long shaft assemblies and improve the working efficiency.

Description

Heating maintenance device, heating maintenance system, maintenance method, and blade lengthening method

Technical Field

The invention relates to the technical field of maintenance equipment, in particular to a long shaft assembly heating maintenance device, a heating maintenance system, a maintenance method of rotating equipment with a plurality of long shaft assemblies and a blade lengthening method of a wind generating set.

Background

With continued operation of the long shaft assembly, such as the blades, localized damage may occur to the long shaft assembly, thereby requiring thermal maintenance of the long shaft assembly. When the long shaft component is a blade of the wind generating set, the wind generating set mainly captures wind energy by the blade, and the length of the blade directly influences the capability of the wind generating set for capturing the wind energy and the output power of the wind generating set. The length of the blade is increased under low wind speed, so that the generated energy of the wind turbine can be effectively improved. In addition, the blade cost is very high, if carry out whole change to active service blade and must increase too high transformation cost, increase wind generating set's cost, therefore the whole change of blade is unfavorable for improving the economic nature that wind generating set transformed. The design of the blade extension section and the implementation process which are reliable in structure and simple to implement is very important for reducing the reconstruction cost.

At present, the extension of the blade is realized through a blade tip extension technology, and the blade tip extension technology generally adopts a structural adhesive bonding mode to connect the blade extension section with the base blade. The existing blade extension construction is aerial platform operation, after the bonding glue connection process of the blade extension section and the base blade is completed, the bonding glue needs to be heated and cured, the aerial platform and the implementing personnel cannot be transferred during the process, and after the integral curing of the bonding part of the extension section needs to be completed, the next implementation process can be carried out, so that a large amount of manpower and material resources are consumed.

Therefore, a need exists for a new apparatus, system, method of maintaining and blade lengthening of long shaft assemblies.

Disclosure of Invention

The embodiment of the invention provides a heating maintenance device, a heating maintenance system, a heating maintenance method and a blade lengthening method.

In one aspect, an embodiment of the present invention provides a long shaft assembly heating maintenance apparatus, including: the heating cabin comprises a cylindrical wall body, a first accommodating cavity is formed by enclosing the cylindrical wall body, and the heating cabin can be sleeved on the peripheral surface of the long shaft assembly through the cylindrical wall body; the heating component is connected to the cylindrical wall body and arranged towards the first accommodating cavity; the locking assembly is connected to the heating cabin, and the heating cabin is detachably connected to the long shaft assembly through the locking assembly.

According to an aspect of the embodiment of the present invention, the locking assembly provides a clamping force along a radial direction of the long shaft assembly to lock the heating compartment at a predetermined position of the outer circumferential surface of the long shaft assembly.

According to an aspect of the embodiment of the present invention, the locking assembly includes a plurality of support rods movably connected to the cylindrical wall body in a radial direction of the cylindrical wall body, and the plurality of support rods are spaced apart from each other in a circumferential direction of the cylindrical wall body.

According to one aspect of the embodiment of the invention, the support rod penetrates through the cylindrical wall body, the support rod comprises a main body and a connecting end extending into the first accommodating cavity, the connecting end is rotatably connected with the main body, a first buffer member is arranged on the connecting end, and the support rod is abutted against the outer peripheral surface of the long shaft assembly through the first buffer member.

According to an aspect of an embodiment of the present invention, the long shaft assembly heating maintenance device further includes: and the auxiliary assembly is connected to the cylindrical wall body and arranged towards the first accommodating cavity, the auxiliary assembly comprises a rolling element and a second buffer element which are connected with each other, the rolling element is connected to the cylindrical wall body through the second buffer element, and the second buffer element has preset deformability so that the rolling element can be in rolling connection with the long shaft assembly.

According to an aspect of an embodiment of the present invention, the long shaft assembly heating maintenance device further includes: the circulating cabin extends for a preset distance along the peripheral surface of the heating cabin and comprises an air inlet, an air outlet and a second accommodating cavity communicated with the air inlet and the air outlet, and the second accommodating cavity is communicated with the first accommodating cavity through the air inlet and the air outlet; the circulating assembly is arranged in the second accommodating cavity and circulates the air in the first accommodating cavity to form hot air flow; the circulation compartment extends a predetermined distance less than a circumference of the peripheral surface of the heating compartment at the peripheral surface of the heating compartment.

According to one aspect of an embodiment of the invention, the heating assembly includes a constant temperature heater disposed adjacent to the air intake in a circumferential direction of the heating compartment.

According to an aspect of an embodiment of the present invention, the heating assembly further includes an auxiliary heating member disposed at a distance from the constant temperature heater in a circumferential direction of the heating compartment.

According to an aspect of an embodiment of the present invention, the auxiliary heating member includes a heating portion and a heat insulating portion connected to each other, the heating portion being disposed toward the first accommodating chamber, the heating portion including a far infrared radiation coating, the heat insulating portion including a heat insulating material coating; or the auxiliary heating element is a far infrared heating plate.

According to an aspect of the embodiment of the present invention, the heating compartment further includes an insulating layer covering an outer circumferential surface of the cylindrical wall.

According to an aspect of the embodiment of the present invention, the heating maintenance device further includes a heat-insulating cover, the heat-insulating cover includes a third accommodating chamber and at least one opening communicating with the third accommodating chamber, the heat-insulating cover can be fitted to the outer peripheral side of the cylindrical wall body through the opening, and the third accommodating chamber can be sealed by sealing the opening.

In another aspect, an embodiment of the present invention provides a heating maintenance system, including: a heating maintenance device such as the above-described heating maintenance device for a long shaft assembly; the temperature acquisition device is arranged in the heating cabin and used for acquiring temperature data in the heating cabin.

According to one aspect of the embodiment of the invention, the temperature acquisition device comprises a first temperature acquisition assembly, wherein the first temperature acquisition assembly is arranged close to the heating assembly in the circumferential direction of the heating cabin so as to acquire first temperature data of air in the heating cabin; the temperature acquisition device also comprises a second temperature acquisition assembly, and the second temperature acquisition assembly can be further arranged on the long shaft assembly so as to acquire second temperature data of the part to be heated on the long shaft assembly.

According to an aspect of an embodiment of the present invention, the heating maintenance system further includes: and the control device is used for controlling the operating parameters of the heating maintenance device according to the first temperature data or controlling the operating parameters of the heating maintenance device according to the first temperature data and the second temperature data, and the operating parameters of the heating maintenance device comprise at least one of heating time and heating temperature of the heating assembly.

According to an aspect of the embodiment of the present invention, the heating maintenance device further includes a circulation chamber and a circulation assembly, the circulation chamber includes a second accommodation chamber, the second accommodation chamber is communicated with the first accommodation chamber, the circulation assembly is disposed in the second accommodation chamber, and circulates the hot air in the first accommodation chamber to form a hot air flow, and the control device is further configured to control at least one of an operation time, an operation power, and an operation speed of the circulation assembly.

In another aspect, an embodiment of the present invention provides a maintenance method for a rotating apparatus having a plurality of long axis assemblies, where the maintenance method includes:

installing a heating maintenance device, and fixing the heating maintenance device of the long shaft assembly at a preset position of one long shaft assembly of the rotating equipment through a locking assembly;

starting the heating assembly to heat the part to be heated of the long shaft assembly;

rotating the rotating equipment until the other long shaft assembly is vertically downward, and fixing the other heating maintenance device at a preset position of the other long shaft assembly of the rotating equipment through the locking assembly;

and starting a heating assembly of the other heating maintenance device to heat the part to be heated of the other long shaft assembly.

According to one aspect of the embodiment of the invention, the maintenance method is used for a blade lengthening process and/or a blade surface heating maintenance process of the impeller.

According to an aspect of the embodiment of the present invention, the heating maintenance device further includes a heat-insulating cover, the heat-insulating cover includes a third accommodating chamber and at least one opening communicating with the third accommodating chamber, and the step of installing the heating maintenance device includes:

installing a heat preservation cover, wherein the heat preservation cover is sleeved on the outer peripheral side of the heating maintenance device through an opening, and the heat preservation cover is provided with at least one opening along the long axis direction;

and locking the opening so as to seal the heating maintenance device in the heat preservation cover.

On the other hand, the embodiment of the invention provides a blade lengthening method of a wind generating set, which comprises the following steps:

providing a blade extension section;

rotating the impeller to rotate one of the base blades to be lengthened to a predetermined position and locking a hub of the impeller;

arranging a bonding material at a to-be-connected position of one base blade to be lengthened and the corresponding blade extension section;

fixing the heating maintenance device at a to-be-connected position of one base blade to be lengthened and the corresponding blade extension section through a locking assembly;

starting a heating assembly to heat the bonding material;

rotating the impeller, and fixing the other heating maintenance device at a to-be-connected position of the other base blade and the blade extension section of the impeller through a locking assembly;

and starting the heating assembly to heat the to-be-connected part of the other base blade and the corresponding blade extension section.

According to the heating maintenance device, the heating maintenance system, the maintenance method and the blade lengthening method of the long shaft assembly provided by the embodiment of the invention, the heating maintenance device comprises the heating cabin, the heating assembly and the locking assembly, the heating cabin comprises the cylindrical wall body, so that the heating cabin can be sleeved on the outer circumferential surface of the long shaft assembly through the cylindrical wall body, the heating assembly arranged in the first accommodating cavity is used for heating a part to be heated of the long shaft assembly, for example, the heating assembly can be used for heating and curing the adhesive glue on the long shaft component, the adhesive property of the adhesive glue is realized, and the heating maintenance of the long shaft assembly is completed. Furthermore, the heating maintenance device is detachably connected with the long shaft assembly through the locking assembly arranged on the heating cabin, so that when the long shaft assembly needs to be maintained, the heating maintenance device can be connected to the long shaft assembly independently, and manual fixing of the heating device on the long shaft assembly by a large amount of manpower and material resources is avoided. Meanwhile, the heating maintenance device can be connected to the long shaft assembly, and when the long shaft assembly is applied to rotatable equipment, the heating maintenance device can move synchronously along with the movement of the long shaft assembly, so that an operator can quickly heat and maintain a plurality of long shaft assemblies, and the maintenance efficiency of the long shaft assemblies is improved.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic perspective view of a heating maintenance device according to an embodiment of the present invention;

FIG. 2 is a schematic view of a blade of a wind turbine generator system in cooperation with a heating maintenance device according to an embodiment of the present invention;

FIG. 3 is a schematic view of a support pole according to an embodiment of the present invention;

FIG. 4 is a schematic perspective view of a heating maintenance device according to an embodiment of the present invention;

FIG. 5 is a side view of a heated maintenance device according to one embodiment of the present invention;

FIG. 6 is a cross-sectional view A-A of FIG. 5;

FIG. 7 is a schematic top view of a heated maintenance unit according to one embodiment of the invention;

FIG. 8 is a schematic view of a wind turbine generator set in conjunction with a heating maintenance system according to an embodiment of the present invention;

FIG. 9 is a schematic flow chart diagram of a method of maintaining a rotating apparatus having a plurality of long axis assemblies in accordance with one embodiment of the present invention;

fig. 10 is a schematic flow chart of a blade lengthening method of a wind generating set according to an embodiment of the invention.

Wherein:

1-a heating maintenance system;

100-heating maintenance means;

10-heating cabin; 11-a cylindrical wall; 12-a first containing cavity; 13-a heat-insulating layer; 14-lifting lug 20-heating assembly; 21-constant temperature heater; 22-auxiliary heating element; 221-a heat-generating portion; 222-a heat preservation part;

30-a locking assembly; 31-a support bar; 311-a main body; 312-a connection end; 313-a first buffer; 314-a rotating member;

40-an auxiliary component; 41-rolling members; 42-a second buffer;

50-a circulation cabin; 51-an air inlet; 52-air outlet; 53-a second receiving chamber;

60-a circulation assembly;

201-a first temperature acquisition assembly; 202-a second temperature acquisition component;

2, a tower barrel; 3-a cabin; 4-an impeller; 401-a hub; 402-a blade; 4021-base blade; 4022-extension of blade.

X-circumferential direction; y-radial; z-the long axis direction; m-hot gas stream.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

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.

The following description will be given with reference to the orientation words shown in the drawings, and the specific configurations of the heating maintenance device, the heating maintenance system, the maintenance method, and the blade lengthening method according to the present invention are not limited thereto. 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.

For a better understanding of the present invention, a heating maintenance apparatus, a heating maintenance system, a maintenance method, and a blade lengthening method according to embodiments of the present invention will be described in detail below with reference to fig. 1 to 10.

In the existing maintenance of equipment with long shaft components, when the surfaces of the long shaft components are worn or the long shaft components need to be increased, the surfaces of the long shaft components are generally repaired or an extension joint is connected with a basic long shaft component in a structural adhesive bonding mode. In general, in the maintenance of the long shaft assembly, the adhesive is mainly heated and cured to optimize the adhesive performance of the adhesive, and therefore, the heating maintenance device 100 for the long shaft assembly has higher requirements.

Referring to fig. 1, fig. 1 is a schematic perspective view of a heating maintenance device according to an embodiment of the present invention.

In order to better meet the above requirement, the embodiment of the present invention provides a long shaft assembly heating maintenance device 100, and the heating maintenance device 100 includes a heating chamber 10, a heating assembly 20, and a locking assembly 30. The heating cabin 10 includes a cylindrical wall body 11, the cylindrical wall body 11 encloses to form a first accommodating cavity 12, the heating cabin 10 is sleeved on the outer peripheral surface of the long axis component through the cylindrical wall body 11, the heating component 20 is connected to the cylindrical wall body 11 and arranged towards the first accommodating cavity 12, the locking component 30 is connected to the heating cabin 10, and the heating cabin 10 is detachably connected to the long axis component through the locking component 30. The volume of the first receiving chamber 12 can be set according to the dimensional parameters of the long shaft assembly.

In some embodiments, the cylindrical wall 11 comprises at least one opening in the long axis direction Z through which the long axis component can protrude into the interior of the heating compartment 10. Optionally, as shown in fig. 1, two ends of the cylindrical wall body 11 along the long axis direction Z include two openings, and the long axis assembly can completely penetrate through the two openings, so that the heating cabin 10 is sleeved on the outer peripheral surface of the long axis assembly, at this time, the extension length of the cylindrical wall body 11 along the long axis direction Z can be set according to the size of the part to be heated of the long axis assembly, so as to simplify the structure of the cylindrical wall body 11, and also achieve the weight reduction effect of the heating maintenance device 100, and improve the practicability of the heating maintenance device 100.

The long shaft component can be a component with a long shaft, such as a blade of a wind generating set. Since the heating maintenance process for the long shaft assembly is similar, the embodiment of the invention is described by taking the heating maintenance for the blade as an example.

Referring to fig. 1 to 3 together, fig. 2 shows a schematic view of a blade of a wind turbine generator system and a heating maintenance device according to an embodiment of the present invention, and fig. 3 shows a schematic view of a support rod according to an embodiment of the present invention.

In some embodiments, the present invention provides a wind turbine generator set, which mainly includes a tower 2, a nacelle 3, a generator, and an impeller 4, wherein the nacelle 3 is disposed at a top end of the tower 2, and the generator is disposed in the nacelle 3, and may be located inside the nacelle 3, or may be located outside the nacelle 3. The impeller 4 comprises a hub 401 and more than two blades 402 respectively connected with the hub 401, and the blades 402 drive the hub 401 to rotate under the action of wind load, so that the power generation of the generator is realized.

According to the structural introduction of the wind generating set, the size of the blade 402 and the wind sweeping area of the blade 402 in the rotating process are increased, so that the wind energy capture energy of the wind generating set can be improved, and the generating power of the wind generating set is further improved. Therefore, in order to increase the power of the existing wind turbine generator system, the base blade 4021 of the existing wind turbine generator system needs to be increased to increase the wind area of the blade 402.

Typically, an operator adds the blade extension 4022 to the tip of the blade 402 to increase the length of the blade 402, and the operator needs to apply adhesive between the blade extension 4022 and the base blade 4021 to form a new blade 402. The blade extension 4022 and the base blade 4021 need to be heated and cured during the bonding process to achieve stable connection of the bonding glue, so that the heating maintenance device 100 for the blade 402 has higher requirements.

In order to better meet the above requirements, when the heating maintenance device 100 according to the embodiment of the present invention is used to perform heating maintenance on the blades 402 of the wind turbine generator system, the heating cabin 10 may be fixedly connected to the base blade 4021 and the blade extension 4022 through the locking assembly 30, and the adhesive between the base blade 4021 and the blade extension 4022 may be heated and maintained without manual operation. Meanwhile, the heating maintenance device 100 can be connected to the blade 402, and when the blade 402 rotates, the heating maintenance device 100 can rotate synchronously, so that an operator can quickly heat and maintain a plurality of base blades 4021, and the maintenance efficiency of the blade 402 is improved.

It is understood that the heating maintenance device 100 provided by the embodiment of the present invention can be applied not only to the heating curing of the adhesive between the blade extension 4022 and the base blade 4021, but also to the heating curing of the composite material repair on the blade 402.

In some alternative embodiments, the locking assembly 30 provides a clamping force along the radial direction of the long shaft assembly to lock the heating compartment 10 at a predetermined position on the outer circumferential surface of the long shaft assembly. By providing the locking assembly 30 with a clamping force along the radial direction of the long shaft assembly, the heating chamber 10 is advantageously stably locked on the long shaft assembly. When the long axis component is the blade 402 and is applied to the wind turbine generator system, the heating cabin 10 is stably connected to the outer circumferential surface of the blade 402 through the locking component 30, so that the heating cabin 10 is prevented from being shifted due to the rotation of the blade 402 along with the rotation of the rotor, and the heating cabin 10 can stably perform heating maintenance on the part to be heated on the long axis component.

In some alternative embodiments, the locking assembly 30 includes a plurality of support rods 31 movably arranged along the radial direction Y of the cylindrical wall 11 and connected to the cylindrical wall 11, and the plurality of support rods 31 are spaced from each other along the circumferential direction X of the cylindrical wall 11. Through the arrangement, the heating cabin 10 is stably connected to the surface of the long shaft assembly under the condition that the plurality of support rods 31 clamp the long shaft assembly.

In practice, when the long axis component is the blade 402, since the surface of the blade 402 is irregular, the number of the plurality of support rods 31 and the connection position on the cylindrical wall 11 can be determined according to the sectional wing shape of the support rods 31 at the clamping point on the blade 402. Alternatively, the windward casing and the leeward casing of the blade 402 may be arranged with the support rods 31 corresponding one to one, so that the plurality of support rods 31 are stably clamped on the outer circumferential surface of the long shaft assembly.

In some alternative embodiments, the supporting rod 31 penetrates through the cylindrical wall body 11, the supporting rod 31 includes a main body 311 and a connecting end 312 extending into the first accommodating cavity 12, the connecting end 312 is rotatably connected to the main body 311, a first buffer member 313 is disposed on the connecting end 312, and the supporting rod 31 abuts against the outer circumferential surface of the long shaft assembly through the first buffer member 313. Since the locking assembly 30 fixes the heating compartment 10 to the long shaft assembly by the clamping force, in order to avoid damage to the long shaft assembly caused by over-tight clamping force, a first buffer member 313 is disposed on the connecting end 312 of the supporting rod 31, and the first buffer member 313 may be made of rubber material or other elastic material. Meanwhile, the first cushion 313 can improve the friction between the support rod 31 and the long-axis assembly, and prevent the support rod 31 from deviating in the long-axis direction Z.

In addition, when the long axis component is the blade 402, the surface of the blade 402 is a complex curved surface structure, and the connecting end 312 of the supporting rod 31 is rotatably connected with the main body 311, so that the connecting end 312 can be well matched with the surface of the blade 402.

In a specific implementation, a rotating element 314 may be disposed between the connecting end 312 and the first buffer 313, and the rotating element 314 may be a universal joint or the like. The first buffer 313 can be rotatably connected with the connecting end 312 through the arrangement, so that the first buffer 313 can be matched with the outer peripheral surface of the long shaft assembly better.

Optionally, the support rod 31 is connected with the cylindrical wall 11 through a screw thread, and the position between the support rod 31 and the cylindrical wall 11 is fixed through a self-locking effect of a screw thread pair, so that the heating maintenance device 100 is stably arranged on the long shaft assembly. Optionally, other self-locking elements, such as a snap assembly, may be disposed between the support rod 31 and the cylindrical wall 11.

In order to prevent the heating maintenance device 100 from slipping off due to the failure of the threaded connection between the support rod 31 and the cylindrical wall body 11, a plurality of lifting lugs 14 are provided on the cylindrical wall body 11 of the heating compartment 10, and the plurality of lifting lugs 14 are distributed at intervals along the circumferential direction X of the cylindrical wall body 11. When the heating maintenance device 100 is connected to the blade 402, safety ropes may be disposed at the blade root and the blade tip of the blade 402, and the safety ropes are respectively connected to the plurality of lifting lugs 14, so as to further improve the connection stability between the heating maintenance device 100 and the long shaft assembly.

Referring to fig. 4 to 7 together, fig. 4 is a schematic perspective view illustrating a heating maintenance device according to an embodiment of the present invention, fig. 5 is a side view illustrating the heating maintenance device according to the embodiment of the present invention, fig. 6 is a cross-sectional view taken along line a-a of fig. 5, and fig. 7 is a schematic top view illustrating the heating maintenance device according to the embodiment of the present invention.

When the long axis component needs to be heated and maintained, the heating cabin 10 of the heating and maintaining device 100 needs to be sleeved on the outer surface of the long axis component through the cylindrical wall body 11, and if the heating cabin 10 shakes along the radial Y direction of the long axis component in the sleeving process, the heating component 20 and other structures inside the heating cabin 10 are likely to interfere with the long axis component, so that the heating component 20 or the long axis component is damaged. Therefore, in combination with the above possible implementation manner, in order to efficiently and accurately dispose the heating maintenance device 100 at the preset position on the outer peripheral surface of the long shaft assembly, the heating maintenance device 100 further includes an auxiliary assembly 40, the auxiliary assembly 40 is connected to the cylindrical wall body 11 and disposed toward the first accommodating cavity 12, the auxiliary assembly 40 includes a rolling element 41 and a second buffer member 42 that are connected to each other, the rolling element 41 is connected to the cylindrical wall body 11 through the second buffer member 42, and the second buffer member 42 has a predetermined deformability, so that the rolling element 41 can be connected to the long shaft assembly in a rolling manner.

In practical implementation, the number and the arrangement position of the auxiliary assemblies 40 may be set according to the needs of a user, and optionally, the number of the auxiliary assemblies 40 is multiple and is arranged in the first accommodating cavity 12 at intervals along the circumferential direction X of the heating compartment 10. In some alternative embodiments, the auxiliary assemblies 40 are plural and are arranged in the first accommodating cavity 12 at intervals along the long axis direction Z of the heating compartment 10. Through the quantity and the arrangement position that set up auxiliary assembly 40 rationally for the heating is maintained the connection that device 100 can be stable and is being predetermineeing the position at the major axis subassembly, simultaneously, makes operating personnel can reduce and look over at any time whether heating is maintained device 100 and is produced the time of interfering with the major axis subassembly, improves the installation effectiveness that heating was maintained device 100.

When an operator adds the blade extension 4022 to the blade tip of the base blade 4021 to increase the length of the base blade 4021, the bonding glue is arranged between the blade extension 4022 and the base blade 4021, and the bonding glue can be an epoxy structural glue. The epoxy structural adhesive can be cured at a high Temperature, for example, at a Temperature of 60 ℃ to 80 ℃, the curing time can be adjusted according to the ambient Temperature, and the Glass Transition Temperature (Tg) of the epoxy structural adhesive is generally cured to a predetermined standard, for example, the bonding performance of the epoxy structural adhesive reaches the best state when the epoxy structural adhesive is cured to 65 ℃. The optimal bonding performance of the epoxy structural adhesive is influenced by the performance of the adhesive, and reasonable heating and curing of the epoxy structural adhesive is also the key for stably connecting the blade extension section 4022 and the base blade 4021.

In order to meet the above requirements and optimize the adhesion performance of the structural epoxy adhesive to more stably connect the blade extension 4022 and the base blade 4021, in some alternative embodiments, the heating assembly 20 includes a heater, which is a constant Temperature Coefficient (PTC) heater 21, and the PTC heater 21 is disposed near the air inlet 51 in the circumferential direction X of the heating compartment 10.

In some embodiments, the PTC heater comprises a PTC ceramic heating element and an aluminum heat sink. The PTC heater has the advantages of small thermal resistance, high heat exchange efficiency, excellent heat conduction and heat dissipation performance, high efficiency, safety, reliability and the like, and is an automatic constant-temperature and power-saving electric heater. The PTC heater is arranged in the heating component 20, so that the safety performance of the heating maintenance device 100 can be improved, even if the wind generating set stops due to faults, the power of the constant-temperature heater 21 can automatically and rapidly drop, and the surface temperature of the heater is maintained at about Curie temperature (generally about 250 ℃), so that the phenomenon that the surface of an electric heating tube heater turns red is avoided, and potential safety hazards such as scalding and fire disasters are avoided.

In order to better heat the part of the elongated member to be heated, the heating member 20 further comprises an auxiliary heating member 22. The auxiliary heating members 22 are provided at intervals from the constant temperature heater 21 in the circumferential direction X of the heating compartment 10. In some alternative embodiments, the auxiliary heating element 22 is a far infrared electric heating plate. Specifically, the far infrared electric heating plate is made of silicon carbide materials, bonding materials, resistance alloy wires and the like. The far infrared electric heating plate has a wide temperature tolerance range, the surface temperature of the far infrared electric heating plate is 250-1100 ℃, the far infrared electric heating plate can adapt to more complex climatic environments, and the auxiliary heating element 22 is arranged to better heat and maintain long shaft components, particularly blades and other long shaft components operating in the complex climatic environments.

Further, in some embodiments, the auxiliary heating member 22 includes a heating portion 221 and a heat insulating portion 222 connected to each other, the heating portion 221 is disposed toward the first receiving cavity 12, the heating portion 221 includes a far infrared radiation coating, and the heat insulating portion 222 includes a heat insulating material coating. In a specific implementation, the auxiliary heating element 22 may be made of a metal thin plate, a surface of the metal thin plate facing the first accommodating chamber 12 is a heating surface, a far infrared radiation coating may be coated on the heating surface to form the heating portion 221, and the remaining surface of the metal thin plate may be coated with a heat insulating material to increase the heating performance of the auxiliary heating element 22.

In the implementation, the number of the auxiliary heating elements 22 can be set according to the requirements of the user. Alternatively, the number of the auxiliary heating members 22 may be three, and the three auxiliary heating members 22 are uniformly distributed in the circumferential direction X of the heating compartment 10, so that stable heat is supplied at various positions of the heating compartment 10. Of course, all of the three auxiliary heating members 22 may be far infrared electric heating plates, or a combination of the auxiliary heating members 22 of any of the above embodiments.

In order to enable the heating maintenance device 100 of the embodiment of the present invention to uniformly heat the part of the long shaft assembly to be heated, in some alternative embodiments, the heating maintenance device 100 of the long shaft assembly further includes a circulation chamber 50 and a circulation assembly 60. The circulation compartment 50 is formed by extending a predetermined distance along the outer peripheral surface of the heating compartment 10, the circulation compartment 50 includes an air inlet 51, an air outlet 52 and a second accommodating cavity 53 communicating the air inlet 51 and the air outlet 52, the second accommodating cavity 53 is communicated with the first accommodating cavity 12 through the air inlet 51 and the air outlet 52, the circulation assembly 60 is disposed in the second accommodating cavity 53, and the circulation assembly 60 circulates the air in the first accommodating cavity 12 to form a hot air flow. With the above arrangement, the circulation module 60 provided in the circulation compartment 50 is enabled to circulate the hot air heated by the heating module 20, so that the air temperature at each position inside the heating compartment 10 is uniform to uniformly heat the long shaft module.

Optionally, the circulation assembly 60 is a fan assembly, and the fan assembly rotates from the air inlet 51 to the air outlet 52, so that the hot air inside the heating compartment 10 forms the hot air flow M under the action of the circulation assembly 60. Specifically, referring to fig. 7, when the heating maintenance device 10 of the embodiment of the present invention is in operation, the flow loop of the hot air flow M is as follows: hot air is formed near the constant temperature heater 21, the hot air enters the circulation chamber 50 through the air inlet 51, and the circulation unit 60 provided in the circulation chamber 50 discharges the hot air through the air outlet 52 and then circulates back to the vicinity of the heater of the constant temperature heater 21. Further, when the heating maintenance device 10 performs heating maintenance on the blade 402, the hot air flow M flows around the outer shell surface of the blade 402, and the hot air flow M continuously circulates to stably heat the portion of the blade 402 to be heated. During the circulation of the hot air flow M, the auxiliary heating elements 22 disposed on the heating compartment 10 can supplement the heat of the hot air flow M according to the temperature control requirement, and maintain the temperature at various positions in the heating compartment 10 uniform.

To better circulate the air heated inside the heating compartment 10, the circulation compartment 50 extends a predetermined distance less than the circumference of the outer circumferential surface of the heating compartment 10 over the outer circumferential surface of the heating compartment 10. Alternatively, the circulation compartment 50 extends along the outer circumferential surface of the heating compartment 10 along a circular arc segment perpendicular to the axis of the heating compartment 10, and the circulation assembly 60 is disposed at a local position on the outer circumferential surface of the heating compartment 10, so as to circulate the air inside the heating compartment 10.

In order to improve the energy utilization efficiency of the heating module 20 and reduce the heat loss, in some embodiments, the heating compartment 10 further includes an insulating layer 13, and the insulating layer 13 covers the outer circumferential surface of the cylindrical wall 11.

In particular, the heating chamber 10 may be coated with an insulation material on the outer circumferential surface thereof, and the insulation material may be made of glass wool, heat-resistant blanket, heat-insulating foam glass, polyurethane, or the like.

In order to more effectively heat and maintain the long shaft assembly and improve the utilization rate of heat, in some embodiments, the heating and maintaining device 100 further includes a heat-insulating cover (not shown in the figure), the heat-insulating cover includes a third accommodating cavity and at least one opening communicated with the third accommodating cavity, the heat-insulating cover can be sleeved on the outer peripheral side of the cylindrical wall body 11 through the opening, and the third accommodating cavity can be sealed through the sealing opening. Specifically, the heat-insulating cover can be made of a heat-resistant flame-retardant heat-insulating material. The heat preservation cover can be in a structural form with two open ends. When the heating cabin 10 is fixedly connected to the outer circumferential surface of the long shaft assembly through the locking assembly 30, the heat-insulating cover can be sleeved on the outer circumferential side of the heating cabin 10, and the opening of the heat-insulating cover is locked, so that the heating maintenance device 100 and the part to be heated of the long shaft assembly are sealed in the heat-insulating cover, and heat loss is effectively prevented.

To sum up, the heating maintenance device 100 according to the embodiment of the present invention includes the heating chamber 10, the heating element 20 and the locking element 30, and the heating chamber 10 includes the cylindrical wall 11, so that the heating chamber 10 can be sleeved on the outer circumferential surface of the long shaft element through the cylindrical wall 11, so that the heating element 20 disposed inside the first accommodating cavity 12 heats the portion of the long shaft element to be heated, for example, the heating element 20 can heat and cure the adhesive on the long shaft element, so as to realize the adhesive property of the adhesive, thereby completing the heating maintenance of the long shaft element. Further, the heating maintenance device 100 is detachably connected with the long shaft assembly through the locking assembly 30 arranged on the heating cabin 10, so that when the long shaft assembly needs to be maintained, the heating maintenance device 100 can be connected to the long shaft assembly independently, and the heating device is prevented from being manually fixed on the long shaft assembly due to the consumption of a large amount of manpower and material resources. Meanwhile, the heating maintenance device 100 can be connected to the long shaft assembly, and when the long shaft assembly is applied to rotatable equipment, the heating maintenance device 100 can move synchronously along with the movement of the long shaft assembly, so that an operator can quickly realize heating maintenance of a plurality of long shaft assemblies, and the maintenance efficiency of the long shaft assemblies is improved.

Referring to fig. 8, fig. 8 is a schematic diagram illustrating a wind turbine generator set and a heating maintenance system according to an embodiment of the invention. The embodiment of the invention also provides a heating maintenance system 1, wherein the heating maintenance system 1 comprises a heating maintenance device 100 and a temperature acquisition device, the heating maintenance device 100 is the heating maintenance device 100 with the long shaft assembly, the temperature acquisition device is arranged in the heating cabin 10, and the temperature acquisition device is used for acquiring temperature data in the heating cabin 10. Since the heating maintenance system 1 provided in the embodiment of the present invention includes the heating maintenance device 100, the same advantages as the heating maintenance device 100 described above are obtained, and no further description is given. Meanwhile, the heating maintenance system 1 further comprises a temperature acquisition device, so that an operator can monitor the real-time temperature in the heating chamber 10 in the actual working process in real time.

According to one aspect of the embodiment of the present invention, the temperature acquisition device comprises a first temperature acquisition assembly 201, and the first temperature acquisition assembly 201 is arranged close to the heating assembly 20 in the circumferential direction X of the heating compartment 10 to acquire first temperature data of the air in the heating compartment 10. The temperature acquisition device further comprises a second temperature acquisition component 202, and the second temperature acquisition component 202 can be further arranged on the long shaft component to acquire second temperature data of the part to be heated on the long shaft component. Optionally, when the heating maintenance device 100 includes the circulation compartment 50, and the circulation compartment 50 includes the air outlet 52, the first temperature collection assembly 201 may also be disposed near the air outlet 52 in the circumferential direction X of the heating compartment 10 to collect the temperature near the air outlet 52.

Specifically, the temperature collecting device may only include the first temperature collecting component 201, and the first temperature collecting component 201 is connected to the cylindrical wall 11 to collect the first temperature data of the air in the heating compartment 10. The temperature acquisition device may also include the first temperature acquisition component 201 and the second temperature acquisition component 202, the second temperature acquisition component 202 may also be disposed on the cylindrical wall 11, and the connection line of the second temperature acquisition component 202 is redundantly disposed, so that the second temperature acquisition component 202 can be further connected to the outer peripheral surface of the long shaft component, for example, the second temperature acquisition component 202 may be disposed on the outer peripheral surface of the blade extension 4022, so as to acquire the second temperature data of the to-be-heated portion on the long shaft component. Of course, the number of the first temperature collection assemblies 201 and the second temperature collection assemblies 202 can be set according to the user requirement.

According to an aspect of the embodiment of the present invention, the heating maintenance system 1 further includes a control device (not shown in the figure) for controlling an operation parameter of the heating maintenance device 100 according to the first temperature data, or for controlling an operation parameter of the heating maintenance device 100 according to the first temperature data and the second temperature data, and the operation parameter of the heating maintenance device 100 includes at least one of a heating time and a heating temperature.

In specific implementation, when the heating maintenance system 1 is applied to heating maintenance of the blades 402 of the wind turbine generator system, the control device presets a preset temperature and a preset heating time of the heating assembly 20, and during operation of the heating maintenance system 1, the temperature in the heating cabin 10 gradually increases to the preset temperature, and the temperature in the heating cabin 10 is made constant through the combined action of the circulating assembly 60 and the heating assembly 20.

The control device may receive the first temperature data to monitor the temperature of the heating assembly 20 and the portion of the blade 402 to be heated in real time, and control the operation parameters of the heating maintenance device 100 according to the first temperature data, for example, when the first temperature data is lower than a preset temperature after the heating assembly 20 has passed a preset heating time, the control device may increase the power of the heating assembly 20 or extend the heating time to provide more heat output. The control device may also receive the second temperature data and control the operation parameters of the heating maintenance device 100 according to the first temperature data and the second temperature data, for example, when the first temperature data does not match the second temperature data, or when the second temperature data is detected to be too high, the control device may reduce the power of the heating assembly 20 or shorten the heating time, so as to better and uniformly heat the portion of the blade 402 to be heated. When the heating maintenance work is finished, the control device can automatically cut off the power supply, the whole heating maintenance system 1 can be remotely controlled, safety and reliability are realized, and the working efficiency can be effectively improved.

For better control of the operation parameters of the heating service device 100, when the heating service device 100 further includes the circulation compartment 50 and the circulation assembly 60 of the above-mentioned embodiment, the control device can also be used for controlling at least one of the operation time, the operation power and the operation speed of the circulation assembly 60.

Specifically, when the circulation assembly 60 is a fan assembly, the control device may control the rotation speed, the operation power or the rotation time of the circulation assembly 60 to effectively circulate the heat generated by the heating assembly 20, so as to heat the portion of the blade 402 to be heated at a constant speed. Wherein the endless element 60 can have a plurality of gear positions, the control means can set the gear position of the endless element 60 to rotate the endless element 60.

Optionally, the control device may also control and adjust the operating parameter of the circulation assembly 60 according to the first temperature data. For example, when the first temperature data is less than the preset temperature for the predetermined heating time, the control device may decrease the operating speed of the circulation assembly 60 to decrease the speed of the thermal circulation to provide sufficient heat to the portion of the blade 402 to be heated.

Referring to fig. 9, fig. 9 is a flow chart illustrating a maintenance method of a rotating apparatus having a plurality of long axis assemblies according to an embodiment of the present invention. As an alternative implementation manner, an embodiment of the present invention further provides a maintenance method for performing heating maintenance on a long shaft assembly by using the above-mentioned heating maintenance apparatus 100, where the maintenance method includes the following steps:

s110, installing the heating maintenance device 100, and fixing the heating maintenance device 100 of the long shaft assembly at a preset position of one long shaft assembly of the rotating equipment through the locking assembly 30;

s120, starting the heating assembly 20 to heat the part to be heated of the long shaft assembly;

s130, rotating the rotating equipment to enable the other long shaft assembly to be vertically downward, and fixing the other heating maintenance device 100 at a preset position of the other long shaft assembly of the rotating equipment through the locking assembly 30;

and S140, starting the heating assembly 20 of the other heating maintenance device 100 to heat the part to be heated of the other long shaft assembly.

In the maintenance method, the structures of the locking assembly 30 and the heating assembly 20 included in the maintenance method can adopt the structural forms of the locking assembly 30 and the heating assembly 20 included in the heating maintenance device 100 of the above embodiments disclosed in fig. 1 to fig. 7, and thus, the details are not repeated herein.

The maintenance method provided by the above embodiment of the present invention can meet the heating maintenance requirements for the long axis components, and when one long axis component is heated and maintained, the long axis component and the heating maintenance device 100 are synchronously rotated along with the rotation of the rotating equipment, so as to rotate the next long axis component to the preset position, and perform the heating maintenance for the next long axis component, so as to rapidly realize the heating maintenance for a plurality of long axis components. It will be appreciated that in one embodiment, the overall weight of the heating service device 100 is relatively low, and optionally, the overall weight of the heating service device 100 is about 40kg, and can be stably coupled to and rotate with the elongate shaft assembly.

According to an aspect of the embodiment of the present invention, the maintenance method of the embodiment of the present invention is used for the blade 402 lengthening process and/or the blade 402 surface heating maintenance process of the impeller 4, so that the blade 402 lengthening process and/or the blade 402 surface heating maintenance process are performed more stably and efficiently, thereby improving the quality of the blade 402 after maintenance.

According to an aspect of an embodiment of the present invention, the heating maintenance device 100 further includes a heat-insulating cover, the heat-insulating cover includes a third accommodating chamber and at least one opening communicating with the third accommodating chamber, and the step of installing the heating maintenance device 100 includes:

installing a heat preservation cover, wherein the heat preservation cover is sleeved on the outer peripheral side of the heating maintenance device 100 through an opening;

the opening is locked to enclose the heating and maintenance device 100 within the insulated enclosure.

Specifically, the opening of the heat-insulating cover can be sealed by using a tie or a strap, so that the heating assembly 20 in the heating compartment 10 can effectively heat the long shaft assembly. The cloth heat preservation cover is arranged on the outer peripheral side of the heating cabin 10, so that heat loss can be effectively prevented.

Referring to fig. 10 together, fig. 10 is a schematic flow chart illustrating a method for lengthening a blade of a wind generating set according to an embodiment of the present invention, and as an alternative implementation, an embodiment of the present invention further provides a method for lengthening a blade 402 of a wind generating set, which is used for lengthening a base blade 4021 by using the above-mentioned heating maintenance device 100, and the method for lengthening a blade includes the following steps:

s210, providing a blade extension section 4022;

s220, rotating the impeller 4, rotating one of the base blades 4021 to be lengthened to a predetermined position and locking the hub of the impeller 4;

s230, arranging an adhesive material at a position to be connected between one base blade 4021 to be lengthened and the corresponding blade extension 4022;

s240, fixing the heating maintenance device 100 at a position to be connected of one base blade 4021 to be lengthened and a blade extension section 4022 to be lengthened through a locking assembly 30;

s250, starting the heating assembly 20 to heat the bonding material;

s260, rotating the impeller 4, and fixing the other heating maintenance device 100 to a to-be-connected position of the other base blade 4021 and the blade extension section 4022 of the impeller 4 through the locking assembly 30;

s270, the heating assembly 20 is turned on to heat the to-be-connected portion of the other base blade 4021 and the corresponding blade extension 4022.

In specific implementation, the base blade 4021 of the wind turbine generator system is lengthened to perform work at high altitude, so that the base blade 4021 can be prevented from being disassembled, and the lengthening process of the base blade 4021 is simplified. In step S220, one of the base blades 4021 to be lengthened is rotated vertically downward and the rotor of the impeller 4 is locked. In step S230, an adhesive material is provided at a to-be-connected position between one of the base blades 4021 to be lengthened and the corresponding blade extension 4022, and the adhesive material is preheated, so that the adhesive material has a certain adhesiveness, and the base blade 4021 and the blade extension 4022 can be preliminarily connected.

In step S240, the heating maintenance device 100 or the heating maintenance system 1 provided by any of the above embodiments of the present invention is sleeved into the blade 402 from the tip of the blade extension 4022, and the heating maintenance device 100 is fixed to the region to be heated by the locking assembly 30. At this time, the safety rope may be led out from the blade root or the hub 401 to be connected and tightened with the lifting eye 14 of the heating maintenance device 100, and the safety rope may be led out from the blade tip cover to be connected and tightened with the lifting eye 14 of the heating maintenance device 100. A 220V power supply is led out from the interior of the nacelle 3 to supply power to the heating maintenance device 100, and the power supply and the data line can be fixed on the outer peripheral surface of the blade 402 to be heated through a magic tape or a ribbon. It is understood that the heating maintenance device 100 can also operate at 380V.

In step S250, a preset heating temperature and a preset heating time of the heating assembly 20 are set according to the process requirement of the blade 402, wherein the preset heating temperature is generally 60 ℃ to 80 ℃. The heating assembly 20 is activated to heat the portion of the blade 402 to be heated.

After the setting of the operating parameters of the heating assembly 20 is completed and started, the step S260 may be performed in time, the impeller 4 is adjusted to rotate, the blade 402 being heated and the heating maintenance device 100 are synchronously rotated by 120 °, so as to rotate another base blade 4021 to be lengthened to a vertical downward direction, and the blade lengthening method according to any of the embodiments described above is repeated. By the method, while one of the base blades 4021 is heated and cured, the other base blade 4021 and the corresponding blade extension section 4022 can be bonded, and then the process sequentially enters a circulating operation state, so that the time for personnel and equipment to wait for curing is greatly shortened. It is understood that in step S260, the angle for adjusting the rotation of the impeller 4 is set according to the number of blades in the wind turbine generator set, and only the base blade 4021 to be lengthened is rotated to be vertically downward.

In summary, in the process of blade power increase of the wind generating set by the blade tip extension technology, by using the heating maintenance device 100 and the heating maintenance system 1 provided by the embodiment of the invention, the problems of uneven heating and incomplete curing of the structural adhesive caused by the traditional electric blanket heating or hot air blower heating mode are avoided, the curing quality of the structural adhesive for bonding the extended blade 402 is improved, and the potential safety hazard of the extended blade 402 in the operation process is reduced. The heating maintenance device 100 provided by the embodiment of the invention can quickly realize the extension operation of a plurality of basic blades 4021, effectively improve the utilization rate of implementation personnel, reduce the implementation period of the whole blade tip extension technology improvement, simultaneously realize unattended heating operation without assistance of high-altitude equipment, shorten the operation period of about 2 days at least by the blade tip extension technology improvement of a single wind generating set, and effectively save the cost.

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. A heated service device (100) for a long shaft assembly, comprising:

the heating cabin (10) comprises a cylindrical wall body (11), the cylindrical wall body (11) is enclosed to form a first accommodating cavity (12), and the heating cabin (10) can be sleeved on the outer peripheral surface of the long shaft assembly through the cylindrical wall body (11);

a heating element (20) connected to the cylindrical wall (11) and arranged facing the first receiving chamber (12);

the locking assembly (30) is connected to the heating cabin (10), and the heating cabin (10) is detachably connected to the long shaft assembly through the locking assembly (30).

2. The heated maintenance device (100) of a long-axis assembly according to claim 1, characterized in that the locking assembly (30) provides a clamping force in a radial direction of the long-axis assembly to lock the heating compartment (10) in a predetermined position of an outer circumferential surface of the long-axis assembly.

3. The heated service device (100) of a long axis assembly according to claim 2, characterized in that the locking assembly (30) comprises a plurality of support bars (31) which are movable in a radial direction (Y) of the cylindrical wall (11) and are connected to the cylindrical wall (11), the plurality of support bars (31) being arranged at a distance from each other in a circumferential direction (X) of the cylindrical wall (11).

4. The heating maintenance device (100) of the long shaft assembly according to claim 3, wherein the supporting rod (31) penetrates through the cylindrical wall body (11), the supporting rod (31) comprises a main body (311) and a connecting end (312) extending into the first accommodating cavity (12), the connecting end (312) is rotatably connected with the main body (311), a first buffer member (313) is arranged on the connecting end (312), and the supporting rod (31) abuts against the outer peripheral surface of the long shaft assembly through the first buffer member (313).

5. The heated maintenance device (100) of a long shaft assembly according to any one of claims 1 to 4, further comprising:

auxiliary assembly (40), connect in tube-shape wall body (11) and orientation first holding chamber (12) set up, auxiliary assembly (40) are including interconnect's rolling element (41) and second bolster (42), rolling element (41) pass through second bolster (42) connect in tube-shape wall body (11), second bolster (42) have predetermined deformability, so that rolling element (41) can with long axis component roll connection.

6. The heated service apparatus (100) of a long shaft assembly of claim 1, further comprising:

the circulating cabin (50) extends for a preset distance along the peripheral surface of the heating cabin (10), the circulating cabin (50) comprises an air inlet (51), an air outlet (52) and a second accommodating cavity (53) for communicating the air inlet (51) with the air outlet (52), and the second accommodating cavity (53) is communicated with the first accommodating cavity (12) through the air inlet (51) and the air outlet (52);

a circulation assembly (60) disposed in the second receiving chamber (53) for circulating the hot air in the first receiving chamber (12) to form a hot air flow (M);

the predetermined distance that the circulation compartment (50) extends at the outer circumferential surface of the heating compartment (10) is smaller than the circumference of the outer circumferential surface of the heating compartment (10).

7. The heated service device (100) of a long shaft assembly according to claim 6, characterized in that the heating assembly (20) comprises a thermostat heater (21), the thermostat heater (21) being arranged close to the air inlet (51) in the circumferential direction (X) of the heating compartment (10).

8. The heated maintenance device (100) of a long-axis assembly according to claim 7, characterized in that the heating assembly (20) further comprises an auxiliary heating element (22), the auxiliary heating element (22) being arranged spaced apart from the thermostatic heater (21) in the circumferential direction (X) of the heating compartment (10).

9. The heating maintenance device (100) of a long axis component according to claim 8, characterized in that the auxiliary heating element (22) comprises a heat generating portion (221) and a heat insulating portion (222) connected to each other, the heat generating portion (221) is disposed toward the first accommodation chamber (12), the heat generating portion (221) comprises a far infrared radiation coating, and the heat insulating portion (222) comprises a heat insulating material coating;

or, the auxiliary heating element (22) is a far infrared heating plate.

10. The heated maintenance device (100) of a long shaft assembly according to claim 1, characterized in that the heating compartment (10) further comprises an insulating layer (13), and the insulating layer (13) covers the outer circumferential surface of the cylindrical wall body (11).

11. The heating maintenance device (100) for a long shaft assembly according to claim 1, further comprising a heat-insulating cover, wherein the heat-insulating cover comprises a third accommodating chamber and at least one opening communicating with the third accommodating chamber, the heat-insulating cover can be sleeved on the outer peripheral side of the cylindrical wall body (11) through the opening, and the third accommodating chamber can be sealed by sealing the opening.

12. A heating maintenance system (1), characterized by comprising:

a heated service device (100), the heated service device (100) of the long shaft assembly of any one of claims 1 to 5, claims 10 to 11;

the temperature acquisition device is arranged in the heating cabin (10) and is used for acquiring temperature data in the heating cabin (10).

13. The heating service system (1) according to claim 12, characterized in that the temperature acquisition device comprises a first temperature acquisition assembly (201), the first temperature acquisition assembly (201) being arranged close to the heating assembly (20) in the circumferential direction (X) of the heating compartment (10) to acquire first temperature data of the air inside the heating compartment (10);

the temperature acquisition device also comprises a second temperature acquisition component (202), wherein the second temperature acquisition component (202) can be further arranged on the long shaft component so as to acquire second temperature data of a part to be heated on the long shaft component.

14. The heating maintenance system (1) according to claim 13, further comprising:

a control device for controlling the operation parameters of the heating maintenance device (100) according to the first temperature data, or for controlling the operation parameters of the heating maintenance device (100) according to the first temperature data and the second temperature data, wherein the operation parameters of the heating maintenance device (100) comprise at least one of the heating time and the heating temperature of the heating assembly (30).

15. The heated service system (1) according to claim 14, characterized in that the heated service device (100) further comprises a circulation cabin (50) and a circulation assembly (60), the circulation cabin (50) comprises a second accommodation chamber (53), the second accommodation chamber (53) is communicated with the first accommodation chamber (12), the circulation assembly (60) is arranged in the second accommodation chamber (53), hot air in the first accommodation chamber (12) is circulated to form a hot air flow (M),

the control device may also be used to control at least one of run time, run power, run speed of the circulation component (60).

16. A method of servicing a rotating apparatus having a plurality of long axis assemblies, the method comprising:

installing a heating maintenance device (100) and fixing the heating maintenance device (100) of the long shaft assembly according to any one of claims 1 to 10 to a preset position of one of the long shaft assemblies of the rotating equipment through the locking assembly (30);

the heating assembly (20) is started to heat the part to be heated of the long shaft assembly;

rotating the rotating equipment until the other long shaft assembly is vertically downward, and fixing the other heating maintenance device (100) at a preset position of the other long shaft assembly of the rotating equipment through the locking assembly (30);

and starting the heating assembly (20) of the other heating maintenance device (100) to heat the part to be heated of the other long shaft assembly.

17. The maintenance method according to claim 16, wherein the maintenance method is used for a blade lengthening process and/or a blade surface heating maintenance process of an impeller.

18. The maintenance method according to claim 16, wherein the heating maintenance device (100) further comprises a heat-insulating cover, the heat-insulating cover comprises a third accommodating cavity and at least one opening communicated with the third accommodating cavity, and the step of installing the heating maintenance device (100) comprises the following steps:

installing a heat preservation cover, wherein the heat preservation cover is sleeved on the outer peripheral side of the heating maintenance device (100) through the opening;

and locking the opening to enable the heating maintenance device (100) to be sealed in the heat-preservation cover.

19. A method for lengthening blades of a wind generating set is characterized by comprising the following steps:

providing a blade extension (4022);

a rotating impeller that rotates one of the base blades (4021) to be lengthened to a predetermined position and locks a hub of the impeller (4);

arranging an adhesive material at a position to be connected between one base blade (4021) to be lengthened and the corresponding blade extension section (4022);

-fixing a heated service device (100) according to any of claims 1 to 11 to the connection between one of the base blades (4021) to be lengthened and the corresponding blade extension (4022) by means of the locking assembly (30);

starting the heating component (20) to heat the bonding material;

rotating the impeller (4) to fix another heating maintenance device (100) to a position to be connected between another base blade (4021) of the impeller (4) and the corresponding blade extension section (4022) through the locking assembly (30);

and starting the heating assembly (20) to heat the to-be-connected part of the other base blade (4021) and the corresponding blade extension section (4022).