CN112682403B

CN112682403B - Heating maintenance device, system, maintenance method and blade lengthening method

Info

Publication number: CN112682403B
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: 2023-05-23
Anticipated expiration: 2039-10-17
Also published as: CN112682403A

Abstract

The invention relates to a heating maintenance device, a 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 surrounding the cylindrical wall body, and the heating cabin is sleeved on the outer peripheral surface of the long shaft assembly through the cylindrical wall body; the heating component is connected with the cylindrical wall body and is 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 provided by the embodiment of the invention can heat and maintain the long shaft assembly autonomously, reduce labor cost, shorten the heating and maintaining time of a plurality of long shaft assemblies and improve working efficiency.

Description

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

Technical Field

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

Background

With continued operation of the long shaft assembly, such as the blades, localized damage to the long shaft assembly occurs, thus requiring heat 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 wind energy and the output power of the wind generating set. The length of the blade is increased at low wind speed, so that the generating capacity of the wind turbine can be effectively improved. In addition, the cost of the blade is very high, if the whole replacement of the active blade is carried out, the excessive transformation cost is increased, and the cost of the wind turbine generator is increased, so that the whole replacement of the blade is not beneficial to improving the transformation economy of the wind turbine generator. The design of the vane extension section and the implementation process which are reliable in structure and simple in implementation is very important to reduce the reconstruction cost.

At present, the blade is prolonged by a blade tip lengthening technology, and the blade tip lengthening technology generally adopts a structural adhesive bonding mode to connect a blade extension section with a basic blade. The existing blade extension construction is high-altitude platform operation, after the bonding glue connection procedure of the blade extension section and the basic blade is completed, the bonding glue needs to be heated and cured, during the period, the high-altitude operation platform and the implementation personnel cannot transfer, after the integral curing of the bonding part of the extension section needs to be completed, the next implementation procedure can be entered, and a great amount of manpower and material resource loss is caused.

Accordingly, there is a need for a new long shaft assembly heating maintenance apparatus, system, maintenance method, and blade lengthening method.

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, wherein the heating maintenance device can independently realize heating maintenance of long shaft assemblies, reduce labor cost, shorten heating maintenance time of a plurality of long shaft assemblies and improve working efficiency.

In one aspect, an embodiment of the present invention provides a heating maintenance device for a long shaft assembly, including: the heating cabin comprises a cylindrical wall body, a first accommodating cavity is formed by surrounding the cylindrical wall body, and the heating cabin can be sleeved on the outer peripheral surface of the long shaft assembly through the cylindrical wall body; the heating component is connected with the cylindrical wall body and is 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 one aspect of an embodiment of the invention, the locking assembly provides a clamping force in a radial direction of the long shaft assembly to lock the heating chamber to a predetermined location on the outer peripheral surface of the long shaft assembly.

According to one aspect of the embodiment of the present invention, the locking assembly includes a plurality of support rods movable along a radial direction of the cylindrical wall and connected to the cylindrical wall, the plurality of support rods being spaced apart from each other along a circumferential direction of the cylindrical wall.

According to one aspect of the embodiment of the invention, the supporting rod penetrates through the cylindrical wall body, the supporting 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 piece is arranged on the connecting end, and the supporting rod abuts against the peripheral surface of the long shaft assembly through the first buffer piece.

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

According to one aspect of the embodiments of the present invention, the heating maintenance device of the long shaft assembly further includes: the circulating cabin extends along the outer peripheral surface of the heating cabin for a preset distance 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 air in the first accommodating cavity to form hot air flow; the circulation tank extends a predetermined distance beyond the peripheral surface of the heating tank less than the perimeter of the peripheral surface of the heating tank.

According to one aspect of an embodiment of the invention, the heating assembly comprises a thermostatic heater arranged adjacent to the air inlet in the circumferential direction of the heating chamber.

According to an aspect of the 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 chamber.

According to an aspect of the embodiment of the invention, the auxiliary heating member comprises a heating part and a heat preservation part which are connected with each other, the heating part is arranged towards the first accommodating cavity, the heating part comprises a far infrared radiation coating, and the heat preservation part comprises a heat preservation and heat insulation material coating; or the auxiliary heating piece is a far infrared heating plate.

According to an aspect of the embodiment of the invention, the heating chamber further comprises an insulating layer covering the outer peripheral surface of the cylindrical wall.

According to an aspect of the embodiment of the present invention, the heating maintenance device further includes a heat-retaining cover including a third accommodation chamber and at least one opening communicating with the third accommodation chamber, the heat-retaining cover being capable of being fitted over an outer peripheral side of the cylindrical wall through the opening, and capable of sealing the third accommodation chamber through the sealing opening.

In another aspect, an embodiment of the present invention provides a heating maintenance system, including: a heating maintenance device, such as the heating maintenance device of the long shaft assembly; the temperature acquisition device is arranged in the heating cabin and is 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 component, wherein the first temperature acquisition component is arranged close to the heating component 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 further comprises a second temperature acquisition component which 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.

According to one aspect of an embodiment of the present invention, the heating maintenance system further includes: and the control device is used for controlling the operation parameters of the heating maintenance device according to the first temperature data or controlling the operation parameters of the heating maintenance device according to the first temperature data and the second temperature data, and the operation 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 cabin and a circulation assembly, the circulation cabin includes a second accommodating cavity, the second accommodating cavity is communicated with the first accommodating cavity, the circulation assembly is disposed in the second accommodating cavity, and circulates hot air in the first accommodating cavity to form a hot air flow, and the control device is further used for controlling at least one of an operation time, an operation power and an operation speed of the circulation assembly.

In still another aspect, an embodiment of the present invention provides a maintenance method for a rotating apparatus having a plurality of long shaft assemblies, wherein 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 to the vertical downward direction of the other long shaft assembly, and fixing the other heating maintenance device at the preset position of the other long shaft assembly of the rotating equipment through the locking assembly;

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

According to one aspect of an 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 including 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:

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

The opening is locked so that the heating maintenance device is sealed in the heat preservation cover.

In still another aspect, an embodiment of the present invention provides a method for lengthening a blade of a wind turbine generator system, where the method includes:

providing a blade extension;

rotating the impeller, rotating one of the basic blades to be lengthened to a preset position and locking the hub of the impeller;

setting adhesive materials at the to-be-connected position of one of the basic blades to be lengthened and the corresponding blade extension section;

the heating maintenance device is fixed at the position to be connected between one of the basic blades 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 the position to be connected between the other basic blade and the blade extension section of the impeller through the 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 system, the maintenance method and the lengthening method of the blade of the long shaft assembly, the heating maintenance device comprises the heating cabin, the heating assembly and the locking assembly, the heating cabin comprises the cylindrical wall body, and the heating cabin can be sleeved on the outer peripheral surface of the long shaft assembly through the cylindrical wall body, so that the heating assembly arranged in the first accommodating cavity heats the part to be heated of the long shaft assembly, for example, the heating assembly can heat and solidify adhesive on the long shaft assembly, so that the adhesive property of the adhesive is realized, and the heating maintenance of the long shaft assembly is completed. Further, 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 the heating device is prevented from being fixed on the long shaft assembly manually due to the fact that a large amount of manpower and material resources are consumed. Meanwhile, as the heating maintenance device can be connected to the long shaft assembly, when the long shaft assembly is applied to rotatable equipment, the heating maintenance device can synchronously move along with the movement of the long shaft assembly, so that an operator can rapidly realize the heating maintenance of 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 apparatus 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 heat maintenance apparatus according to an embodiment of the present invention;

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

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

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

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

FIG. 7 is a schematic top view of a heating maintenance apparatus according to one embodiment of the present invention;

FIG. 8 is a schematic diagram of a wind turbine generator system in conjunction with a heat maintenance system in accordance with one embodiment of the present invention;

FIG. 9 is a flow chart of a method of maintaining a rotary apparatus having a plurality of long axis assemblies according to one embodiment of the invention;

FIG. 10 is a flow chart of a method of lengthening blades of a wind turbine according to an embodiment of the present invention.

Wherein:

1-a heating maintenance system;

100-heating maintenance device;

10-heating cabin; 11-a cylindrical wall; 12-a first accommodation chamber; 13, an insulating layer; 14-lifting lug 20-heating component; 21-a constant temperature heater; 22-auxiliary heating; 221-a heating part; 222-a heat preservation part;

30-locking the assembly; 31-supporting rods; 311-body; 312-connection end; 313-first buffer; 314-rotating member;

40-an auxiliary assembly; 41-rolling elements; 42-a second cushioning member;

50-a circulation tank; 51-an air inlet; 52-an air outlet; 53-a second accommodation chamber;

60-cycle assembly;

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

2-tower; 3-nacelle; 4-impeller; 401-a hub; 402-leaf; 4021—a base blade; 4022-blade extension.

X-circumferential direction; y-radial; z-major axis direction; m-hot gas flow.

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

Detailed Description

Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the 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 invention by showing examples of the invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order not to unnecessarily obscure 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 directional terms appearing in the following description are directions shown in the drawings, and do not limit the specific structures of the heating maintenance apparatus, the system, the maintenance method, and the blade lengthening method of the present invention. In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

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

In existing maintenance of equipment having a long shaft assembly, when the surface of the long shaft assembly wears or the long shaft assembly needs to grow, the surface of the long shaft assembly is usually repaired by adopting a structural adhesive bonding mode or an extension joint is connected with a basic long shaft assembly. In general, in the process of maintaining the long shaft assembly, the adhesive is mainly heated to be cured, so that the adhesive performance of the adhesive is optimized, and thus, there is a higher requirement for the heating and maintaining device 100 for the long shaft assembly.

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

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

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

The long axis assembly may be an assembly having a long axis, such as a blade of a wind turbine generator system. Because the heating and maintenance processes for the long shaft assembly are similar, the embodiment of the invention will be described by taking the heating and maintenance of the blade as an example.

Referring to fig. 1 to 3, fig. 2 is a schematic diagram illustrating the cooperation between a blade and a heating maintenance device of a wind turbine generator system according to an embodiment of the present invention, and fig. 3 is a schematic diagram illustrating a structure of a support rod according to an embodiment of the present invention.

In some embodiments, the present disclosure provides a wind generating set, where the wind generating set mainly includes a tower 2, a nacelle 3, a generator and an impeller 4, 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 in the nacelle 3, or may be located outside the nacelle 3. The impeller 4 comprises a hub 401 and more than two blades 402 which are 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.

The above description of the structure of the wind generating set can increase the size of the blade 402 and the wind sweeping area of the blade 402 in the rotation process, so as to increase the wind energy capturing energy of the wind generating set and further increase the power generation of the wind generating set. Therefore, in order to achieve the power increase of the existing wind turbine, the base blade 4021 on the existing wind turbine needs to be increased to increase the wind sweeping area of the blade 402.

Typically, an operator adds a blade extension 4022 to the blade 402 tip to increase the length of the blade 402, and the operator needs to place an 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 heat and cure the adhesive in the bonding process to realize stable connection of the adhesive, so that the heating maintenance device 100 of the blade 402 has higher requirements.

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

It will be appreciated that the heat maintenance apparatus 100 provided by the embodiments of the present invention may be applied not only to the heat curing of adhesive between the blade extension 4022 and the base blade 4021, but also to the heat curing of composite repair on the blade 402.

In some alternative embodiments, the locking assembly 30 provides a clamping force in the radial direction of the long axis assembly to lock the heating chamber 10 to a predetermined location on the outer peripheral surface of the long axis assembly. By providing a clamping force to the locking assembly 30 in the radial direction of the long axis assembly, a stable locking of the pod 10 to the long axis assembly is facilitated. When the long shaft assembly is the blade 402 and is applied to the wind generating set, the heating cabin 10 is stably connected to the outer peripheral surface of the blade 402 through the locking assembly 30, so that the heating cabin 10 is prevented from being deviated due to rotation of the blade 402 along with the rotation of the rotor, and the heating cabin 10 can stably heat and maintain the part to be heated on the long shaft assembly.

In some alternative embodiments, the locking assembly 30 includes a plurality of support rods 31 movable along the radial direction Y of the cylindrical wall 11 and connected to the cylindrical wall 11, the plurality of support rods 31 being spaced apart from each other along the circumferential direction X of the cylindrical wall 11. By the above arrangement, the heating chamber 10 is stably attached to the surface of the long shaft assembly with the plurality of support rods 31 clamping the long shaft assembly.

In the embodiment, when the long shaft assembly is the blade 402, since the surface of the blade 402 is irregularly shaped, the number of the plurality of support rods 31 and the connection positions on the cylindrical wall 11 may be determined according to the cross-sectional wing shape of the clamping points of the support rods 31 on the blade 402. Alternatively, the windward side housing and the leeward side housing of the blade 402 may be provided with the support rods 31 in one-to-one correspondence, 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 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 with the main body 311, a first buffer member 313 is disposed on the connecting end 312, and the supporting rod 31 abuts against the peripheral surface of the long shaft assembly through the first buffer member 313. Since the locking assembly 30 fixes the heating chamber 10 on the long shaft assembly by the clamping force, in order to avoid damage to the long shaft assembly caused by too tight clamping force, the 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 materials. Meanwhile, by providing the first buffer member 313, the friction between the support bar 31 and the long axis assembly can be increased, and the support bar 31 is prevented from being deviated in the long axis direction Z of the long axis assembly.

In addition, when the long shaft assembly 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 member 314 may be disposed between the connecting end 312 and the first buffer member 313, and the rotating member 314 may be a universal joint or the like. The first buffer member 313 can be rotatably coupled to the coupling end 312 by the above arrangement so that the first buffer member 313 can be better matched with the outer circumferential surface of the long shaft assembly.

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

In order to prevent the sliding of the heating maintenance device 100 due to failure of the screw connection between the support rod 31 and the cylindrical wall 11, a plurality of lifting lugs 14 are provided on the cylindrical wall 11 of the heating chamber 10, and the lifting lugs 14 are distributed at intervals along the circumferential direction X of the cylindrical wall 11. When the heating maintenance device 100 is connected to the blade 402, a safety rope can be arranged at the blade root and the blade tip of the blade 402 and is respectively connected with the lifting lugs 14, so that the connection stability of the heating maintenance device 100 and the long shaft assembly is further improved.

Referring to fig. 4 to 7 together, fig. 4 is a schematic perspective view showing a heating maintenance apparatus according to an embodiment of the present invention, fig. 5 is a side view showing the heating maintenance apparatus according to an embodiment of the present invention, fig. 6 is a cross-sectional view of A-A in fig. 5, and fig. 7 is a schematic top view showing the heating maintenance apparatus according to an embodiment of the present invention.

When the long shaft assembly needs to be heated and maintained, the heating chamber 10 of the heating maintenance device 100 needs to be sleeved on the outer surface of the long shaft assembly through the cylindrical wall 11, and if shaking along the radial Y direction of the long shaft assembly occurs in the process of sleeving the heating chamber 10, the structure of the heating assembly 20 and the like in the heating chamber 10 is likely to interfere with the long shaft assembly, so that the heating assembly 20 or the long shaft assembly is damaged. Therefore, in combination with the above possible implementation manner, in order to enable the heating maintenance device 100 to be efficiently and accurately disposed at a preset position on the outer circumferential surface of the long shaft assembly, the heating maintenance device 100 further includes an auxiliary assembly 40, wherein the auxiliary assembly 40 is connected to the cylindrical wall 11 and is disposed toward the first accommodating cavity 12, the auxiliary assembly 40 includes a rolling member 41 and a second buffer member 42 that are connected to each other, the rolling member 41 is connected to the cylindrical wall 11 through the second buffer member 42, and the second buffer member 42 has a predetermined deformation capability so that the rolling member 41 can be in rolling connection with the long shaft assembly.

In particular embodiments, the number and arrangement of the auxiliary assemblies 40 may be set according to the needs of the user, and optionally, the auxiliary assemblies 40 may be plural and disposed in the first accommodating chamber 12 at intervals along the circumferential direction X of the heating chamber 10. In some alternative embodiments, the number of auxiliary assemblies 40 is plural and disposed within the first receiving chamber 12 at intervals along the long axis direction Z of the heating chamber 10. Through the quantity and the arrangement position of the auxiliary assemblies 40 are reasonably arranged, the heating maintenance device 100 can be stably connected to the preset position of the long shaft assembly, meanwhile, operators can reduce the time for checking whether the heating maintenance device 100 interferes with the long shaft assembly at any time, and the installation efficiency of the heating maintenance device 100 is improved.

When the operator adds the blade extension section 4022 at the blade tip of the base blade 4021 to increase the length of the base blade 4021, the adhesive may be epoxy structural adhesive by setting adhesive between the blade extension section 4022 and the base blade 4021. The epoxy structural adhesive is curable at high temperature, for example, at a temperature of 60-80 ℃, the curing time can be adjusted according to the ambient temperature, and the adhesive property of the epoxy structural adhesive reaches the optimal state when the epoxy structural adhesive is cured to a preset standard, for example, to 65 ℃ by using the glass transition temperature (Glass Transition Temperature, tg) of the epoxy structural adhesive. The optimal adhesion performance of the epoxy structural adhesive is affected by the performance of the adhesive itself, and the reasonable heat curing of the epoxy structural adhesive is also a key to stably connect the blade extension 4022 with the base blade 4021.

To meet the above requirements, the bonding properties of the epoxy adhesive are optimized to more stably connect the blade extension 4022 to the base blade 4021, and in some alternative embodiments, the heating assembly 20 includes a heater that is a constant temperature (Positive Temperature Coefficient, PTC) heater 21, the constant temperature heater 21 being disposed adjacent to 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 electricity-saving electric heater. By providing the PTC heater in the heating module 20, the safety performance of the heating maintenance apparatus 100 can be improved, and even when the wind turbine generator system fails and stops running, the power of the constant temperature heater 21 can be automatically and rapidly reduced, and the surface temperature of the heater is maintained at about the curie temperature (generally about 250 ℃), so that the phenomenon of "redness" on the surface of the electrothermal tube type heater is avoided, and potential safety hazards such as scalding, fire disaster and the like are avoided.

For better heating of the portion of the long shaft assembly to be heated, the heating assembly 20 further includes an auxiliary heating member 22. The auxiliary heating member 22 is provided at a distance from the constant temperature heater 21 in the circumferential direction X of the heating chamber 10. In some alternative embodiments, auxiliary heating 22 is a far infrared electric heating plate. Specifically, the far infrared electric heating plate is made of silicon carbide material, adhesive material, resistance alloy wire and the like. Because the far infrared electric heating plate has wider 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 the environment with complex climate, and the auxiliary heating piece 22 is arranged to better heat and maintain the long shaft assembly, in particular to heat and maintain the long shaft assembly of the blade and the like running in the complex climate environment.

Further, in some embodiments, the auxiliary heating member 22 includes 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 accommodating cavity 12, the heat generating 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 member 22 may be made of a metal sheet, a surface of the metal sheet facing the first accommodating cavity 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 sheet may be coated with a heat insulating material to increase the heating performance of the auxiliary heating member 22.

In practice, the number of auxiliary heating members 22 may be set according to the needs of the user. Alternatively, the number of 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 chamber 10 so that stable heat is provided at each position of the heating chamber 10. Of course, all of the three auxiliary heating members 22 may be far infrared electric heating plates, or may be a combination of the auxiliary heating members 22 of any of the above embodiments.

In order to enable the heating maintenance apparatus 100 of the embodiment of the present invention to uniformly heat the portion to be heated of the long shaft assembly, in some alternative embodiments, the heating maintenance apparatus 100 of the long shaft assembly further includes a circulation tank 50 and a circulation assembly 60. The circulation compartment 50 is formed to extend a predetermined distance along the outer circumferential surface of the heating compartment 10, the circulation compartment 50 includes an air inlet 51, an air outlet 52, and a second receiving chamber 53 communicating the air inlet 51 with the air outlet 52, the second receiving chamber 53 communicates with the first receiving chamber 12 through the air inlet 51 and the air outlet 52, the circulation assembly 60 is disposed in the second receiving chamber 53, and the circulation assembly 60 circulates air in the first receiving chamber 12 to form a hot air flow. Through the above arrangement, the circulation assembly 60 provided in the circulation compartment 50 is enabled to circulate the hot air heated by the heating assembly 20, so that the air temperature at various positions inside the heating compartment 10 is uniform to uniformly heat the long axis assembly.

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 hot air in the heating chamber 10 forms a hot air flow M under the action of the circulation assembly 60. Specifically, referring to fig. 7, in the operation of the heating maintenance apparatus 10 according to the embodiment of the present invention, the flow circuit of the hot air flow M is: hot air is formed near the constant temperature heater 21, enters the circulation tank 50 through the air inlet 51, and the circulation assembly 60 provided in the circulation tank 50 discharges the hot air through the air outlet 52 and circulates back near 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 surface of the housing of the blade 402, and the hot air flow M continuously circulates to stably heat the portion to be heated of the blade 402. During circulation of the hot air flow M, the auxiliary heating member 22 provided on the heating chamber 10 supplements the heat of the hot air flow M according to the temperature control requirement and maintains the temperature uniformity of the heating chamber 10.

For better circulation of the air heated inside the heating chamber 10, the circulation chamber 50 extends a predetermined distance at the outer circumferential surface of the heating chamber 10 less than the circumference of the outer circumferential surface of the heating chamber 10. Alternatively, the circulation module 50 may extend along the outer peripheral surface of the heating chamber 10 along a path of a circular arc perpendicular to the axis of the heating chamber 10, and the circulation of air within the heating chamber 10 may be facilitated by providing the circulation module 60 at a localized location on the outer peripheral surface of the heating chamber 10.

To increase the energy utilization of the heating assembly 20 and reduce heat loss, the heating chamber 10 in some embodiments further includes a thermal insulation layer 13, wherein the thermal insulation layer 13 covers the outer peripheral surface of the cylindrical wall 11.

In practice, the outer peripheral surface of the heating chamber 10 may be coated with a thermal insulation material, which may be made of glass wool, a heat insulation blanket, heat insulation foam glass, polyurethane, or the like.

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

In summary, the heating maintenance device 100 provided in the embodiment of the present invention includes the heating cabin 10, the heating assembly 20 and the locking assembly 30, where the heating cabin 10 includes the cylindrical wall 11, so that the heating cabin 10 can be sleeved on the outer peripheral surface of the long shaft assembly through the cylindrical wall 11, so that the heating assembly 20 disposed in the first accommodating cavity 12 heats the portion to be heated of the long shaft assembly, for example, the heating assembly 20 can heat and cure the adhesive on the long shaft assembly, so as to achieve the adhesive property of the adhesive, thereby completing the heating maintenance of the long shaft assembly. 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 with the long shaft assembly autonomously, and the heating device is prevented from being fixed on the long shaft assembly manually due to the consumption of a large amount of manpower and material resources. Meanwhile, since the heating maintenance device 100 can be connected to the long shaft assembly, when the long shaft assembly is applied to the 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 the 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 system and a heating maintenance system according to an embodiment of the invention. The embodiment of the invention also provides a heating maintenance system 1, the heating maintenance system 1 comprises a heating maintenance device 100 and a temperature acquisition device, the heating maintenance device 100 is a heating maintenance device 100 of 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. Because the heating maintenance system 1 provided in the embodiment of the present invention includes the heating maintenance device 100 described above, the same beneficial effects as those of the heating maintenance device 100 described above are provided, and will not be repeated. 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 cabin 10 in the actual working process in real time.

According to one aspect of the embodiment of the present invention, the temperature acquisition device includes a first temperature acquisition assembly 201, and the first temperature acquisition assembly 201 is disposed near the heating assembly 20 in the circumferential direction X of the heating chamber 10 to acquire first temperature data of the air in the heating chamber 10. The temperature acquisition device further includes a second temperature acquisition assembly 202, where the second temperature acquisition assembly 202 can be further disposed on the long axis assembly to acquire second temperature data of the portion to be heated on the long axis assembly. Alternatively, when the heating maintenance apparatus 100 includes the circulation tank 50 and the circulation tank 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 tank 10 to collect the temperature near the air outlet 52.

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

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 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, the operation parameters of the heating maintenance device 100 including at least one of a heating time and a heating temperature.

In particular, when the heating maintenance system 1 is applied to the heating maintenance of the blades 402 of the wind generating set, the control device presets the preset temperature and the preset heating time of the heating assembly 20, and during the 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 kept constant through the combined action of the circulation 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 to be heated of the blade 402 in real time, and control the operation parameters of the heating maintenance device 100 according to the first temperature data, for example, when the control device recognizes that the first temperature data is lower than the preset temperature after the heating assembly 20 passes the preset heating time, the control device may increase the power of the heating assembly 20 or prolong the heating time to provide more heat output. The control device may also receive the second temperature data control device 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 uniformly heat the portion to be heated of the blade 402. 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, and the heating maintenance system is safe and reliable and can effectively improve the working efficiency.

For better control of the operating parameters of the heating maintenance apparatus 100, when the heating maintenance apparatus 100 further comprises the circulation tank 50 and the circulation assembly 60 of the above-described embodiments, the control apparatus may be further configured to control at least one of the operating time, the operating power, and the operating 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 running power or the rotation time of the circulation assembly 60 to effectively circulate the heat generated by the heating assembly 20, so as to uniformly heat the portion to be heated of the blade 402. Wherein, the circulation assembly 60 can have a plurality of gears, and the control device can set the gears of the circulation assembly 60 to rotate the circulation assembly 60.

Optionally, the control device may also control and adjust the operation parameters 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 a predetermined heating time, the control device may reduce the operating speed of the circulation assembly 60, reducing the speed of the thermal cycle, 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 rotary apparatus having a plurality of long shaft assemblies according to an embodiment of the invention. As an optional implementation manner, the embodiment of the present invention further provides a maintenance method, configured to perform heat maintenance on the long shaft assembly by using the heat maintenance device 100, where the maintenance method includes the following steps:

S110, installing a 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 a 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 the vertical downward direction of the other long shaft assembly, and fixing the other heating maintenance device 100 at the 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 structure of the locking assembly 30 and the heating assembly 20 may be the structure of the locking assembly 30 and the heating assembly 20 of the heating maintenance device 100 of each of the embodiments disclosed in fig. 1 to 7, and will not be described herein.

According to the maintenance method provided by the embodiment of the invention, the heating maintenance requirements on the long shaft assemblies can be met, and the long shaft assemblies and the heating maintenance device 100 synchronously rotate along with the rotation of the rotating equipment while one long shaft assembly is heated and maintained, so that the next long shaft assembly is rotated to a preset position for the heating maintenance of the next long shaft assembly, the heating maintenance of a plurality of long shaft assemblies is rapidly realized, and compared with the traditional heating maintenance of one long shaft assembly and then the heating maintenance of the other long shaft assembly, the process time can be greatly shortened. It will be appreciated that in one embodiment, the overall weight of the heating maintenance apparatus 100 is relatively small, and alternatively, the overall weight of the heating maintenance apparatus 100 is approximately 40kg, and can be stably coupled to and rotated synchronously with the long 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 more stable and efficient, and the quality of the maintained blade 402 is improved.

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

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

the opening is locked so that the heating maintenance device 100 is enclosed within the thermal enclosure.

Specifically, the openings in the thermal cover may be sealed using ties or straps or the like to allow the heating assembly 20 within the heating chamber 10 to effectively heat the long axis assembly. By providing the cloth thermal insulation cover on the outer peripheral side of the heating chamber 10, heat dissipation can be effectively prevented.

Referring to fig. 10 together, fig. 10 shows a flow chart of a method for lengthening a blade of a wind turbine generator system according to an embodiment of the present invention, and as an alternative implementation manner, the embodiment of the present invention further provides a method for lengthening a blade 402 of a wind turbine generator system, which is used for lengthening a base blade 4021 by using the heating maintenance device 100, and the method for lengthening a blade includes the following steps:

S210, providing a blade extension 4022;

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

s230, setting adhesive materials at the to-be-connected position of one of the base blades 4021 to be lengthened and the corresponding blade extension section 4022;

s240, fixing the heating maintenance device 100 at a position to be connected between one of the basic blades 4021 to be lengthened and the blade extension section 4022 through the 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 at the position to be connected between the other base blade 4021 and the blade extension section 4022 of the impeller 4 through the locking assembly 30;

s270, turning on the heating assembly 20 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 generating set can be lengthened to operate at high altitude, so that the base blade 4021 can be prevented from being disassembled, and the lengthening procedure of the base blade 4021 is simplified. In step S220, one of the base blades 4021 to be lengthened is rotated to be vertically downward and locks the rotor of the impeller 4. In step S230, an adhesive material is disposed at the to-be-connected position of one of the base blades 4021 to be lengthened and the corresponding blade extension section 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 section 4022 can be primarily connected.

In step S240, the heating maintenance apparatus 100 or the heating maintenance system 1 provided in 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 apparatus 100 is fixed to the area to be heated by the locking assembly 30. At this time, the safety rope can be led out from the blade root or the hub 401 to be connected and tightened with the lifting lug 14 on the heating maintenance device 100, and the safety rope can be sleeved from the blade tip to be connected and tightened with the lifting lug 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 wires can be fixed on the outer peripheral surface of the blade 402 to be heated through a velcro and a ribbon. It will be appreciated that the heating maintenance device 100 may also operate at 380V.

In step S250, the preset heating temperature and the preset heating time of the heating assembly 20 are set according to the process requirements of the blade 402, and 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 working parameters of the heating assembly 20 is completed and started, step S260 may be performed in time, and the impeller 4 is adjusted to rotate, so that the blade 402 being heated and the heating maintenance device 100 are synchronously rotated by 120 ° to rotate the other base blade 4021 to be lengthened to a vertical downward direction, and the blade lengthening method of any of the above embodiments is repeated. By the method, when one of the base blades 4021 is heated and cured, the bonding process of the other base blade 4021 and the corresponding blade extension section 4022 can be performed, and the subsequent cyclic operation state is sequentially carried out, so that the time for waiting for curing by personnel and equipment is greatly shortened. It is to be understood that, in step S260, the rotation angle of the adjusting impeller 4 is set according to the number of blades in the wind generating set, so long as the base blades 4021 to be lengthened are rotated to a vertically downward direction.

In summary, in the blade power increasing process of the wind generating set through the blade tip extension technology, by adopting 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 structural adhesive caused by a traditional electric blanket heating or air heater heating mode are avoided, the curing quality of the bonding structural adhesive of 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 base blades 4021, effectively improve the utilization rate of operators, reduce the implementation period of the improvement of the whole blade tip extension technology, simultaneously realize the unattended heating operation without the assistance of high-altitude equipment, and shorten the operation period of at least about 2 days by the improvement of the blade tip extension technology of a single wind generating set, thereby effectively saving 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 respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A heating maintenance device (100) of a long shaft assembly, comprising:

the heating cabin (10) comprises a cylindrical wall body (11), a first accommodating cavity (12) is formed by surrounding the cylindrical wall body (11), 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 disposed towards the first housing chamber (12);

a locking assembly (30) connected to the heating chamber (10), the heating chamber (10) being detachably connected to the long shaft assembly by the locking assembly (30);

the auxiliary assembly (40) is connected to the cylindrical wall body (11) and faces the first accommodating cavity (12), the auxiliary assembly (40) comprises a rolling element (41) and a second buffer element (42) which are connected with each other, the rolling element (41) is connected to the cylindrical wall body (11) through the second buffer element (42), and the second buffer element (42) has preset deformation capacity so that the rolling element (41) can be in rolling connection with the long shaft assembly.

2. The long shaft assembly heating maintenance device (100) according to claim 1, wherein the locking assembly (30) provides a clamping force in a radial direction of the long shaft assembly to lock the heating chamber (10) at a predetermined position of an outer circumferential surface of the long shaft assembly.

3. The heating maintenance device (100) of a long shaft assembly according to claim 2, wherein the locking assembly (30) includes a plurality of support rods (31) movable in a radial direction (Y) of the cylindrical wall body (11) and connected to the cylindrical wall body (11), the plurality of support rods (31) being disposed at intervals from each other in a circumferential direction (X) of the cylindrical wall body (11).

4. A heating and maintaining device (100) for a 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 circumferential surface of the long shaft assembly through the first buffer member (313).

5. The long shaft assembly heating maintenance device (100) of claim 1, further comprising:

a circulation compartment (50) formed to extend a predetermined distance along an outer circumferential surface of the heating compartment (10), the circulation compartment (50) including an air inlet (51), an air outlet (52), and a second accommodation chamber (53) communicating the air inlet (51) with the air outlet (52), the second accommodation chamber (53) communicating with the first accommodation chamber (12) through the air inlet (51) and the air outlet (52);

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

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

6. The heating maintenance device (100) of a long shaft assembly according to claim 5, wherein the heating assembly (20) comprises a constant temperature heater (21), the constant temperature heater (21) being disposed close to the air intake (51) in a circumferential direction (X) of the heating chamber (10).

7. The heating maintenance device (100) of a long shaft assembly according to claim 6, wherein the heating assembly (20) further comprises an auxiliary heating member (22), the auxiliary heating member (22) being disposed at a distance from the constant temperature heater (21) in a circumferential direction (X) of the heating chamber (10).

8. The heating maintenance device (100) of a long shaft assembly according to claim 7, wherein the auxiliary heating member (22) comprises a heat generating portion (221) and a heat retaining portion (222) connected to each other, the heat generating portion (221) being disposed toward the first accommodation chamber (12), the heat generating portion (221) comprising a far infrared radiation coating, the heat retaining portion (222) comprising a heat retaining heat insulating material coating;

Or, the auxiliary heating member (22) is a far infrared heating plate.

9. The heating maintenance device (100) of a long shaft assembly according to claim 1, wherein the heating chamber (10) further comprises an insulating layer (13), and the insulating layer (13) covers the outer peripheral surface of the cylindrical wall body (11).

10. The heating maintenance device (100) of a long shaft assembly according to claim 1, further comprising a heat-retaining cover including a third accommodation chamber and at least one opening communicating with the third accommodation chamber, the heat-retaining cover being capable of being fitted over an outer peripheral side of the cylindrical wall (11) through the opening, the third accommodation chamber being capable of being sealed by sealing the opening.

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

a heating maintenance device (100), a heating maintenance device (100) of a long shaft assembly according to any one of claims 1 to 4, 9 to 10;

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

12. The heating maintenance system (1) according to claim 11, wherein 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 a circumferential direction (X) of the heating compartment (10) to acquire first temperature data of air inside 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 so as to acquire second temperature data of a part to be heated on the long shaft component.

13. The heating maintenance system (1) of claim 12, further comprising:

control means for controlling an operating parameter of the heating maintenance device (100) in accordance with the first temperature data or for controlling an operating parameter of the heating maintenance device (100) in accordance with the first temperature data and the second temperature data, the operating parameter of the heating maintenance device (100) comprising at least one of a heating time and a heating temperature of the heating assembly (20).

14. The heating maintenance system (1) according to claim 13, wherein the heating maintenance device (100) further comprises a circulation cabin (50) and a circulation assembly (60), the circulation cabin (50) comprises a second containing cavity (53), the second containing cavity (53) is communicated with the first containing cavity (12), the circulation assembly (60) is arranged in the second containing cavity (53) and circulates hot air in the first containing cavity (12) to form a hot air flow (M),

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

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

-mounting a heating maintenance device (100), fixing the heating maintenance device (100) of a long shaft assembly according to any one of claims 1 to 9 to a preset position of one of the long shaft assemblies of the rotating apparatus by means of the locking assembly (30);

starting the heating component (20) to heat the part to be heated of the long shaft component;

rotating the rotating equipment to the vertical downward direction of the other long shaft assembly, and fixing the other heating maintenance device (100) at the preset position of the other long shaft assembly of the rotating equipment through the locking assembly (30);

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

16. The maintenance method according to claim 15, wherein the maintenance method is used for a blade lengthening process of an impeller and/or a blade surface heating maintenance process.

17. The maintenance method according to claim 15, wherein the heating maintenance device (100) further comprises a thermal cover comprising a third housing chamber and at least one opening communicating with the third housing chamber, the step of installing the heating maintenance device (100) comprising, after:

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

the opening is locked so that the heating and maintenance device (100) is enclosed in the heat-preserving cover.

18. A method of lengthening a blade of a wind turbine generator system, the method comprising:

providing a blade extension (4022);

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

arranging an adhesive material at the joint between one of the base blades (4021) to be lengthened and the corresponding blade extension section (4022);

the heating maintenance device (100) according to any one of claims 1 to 10, being fixed by means of the locking assembly (30) at the junction of one of the base blades (4021) to be lengthened with the corresponding blade extension (4022);

-opening the heating assembly (20) to heat the adhesive material;

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

and starting the heating component (20) to heat the joint between the other basic blade (4021) and the corresponding blade extension section (4022).