CN113700617A - Blade tip anti-icing and deicing device of horizontal axis wind generating set and installation method - Google Patents
Blade tip anti-icing and deicing device of horizontal axis wind generating set and installation method Download PDFInfo
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- CN113700617A CN113700617A CN202111102921.5A CN202111102921A CN113700617A CN 113700617 A CN113700617 A CN 113700617A CN 202111102921 A CN202111102921 A CN 202111102921A CN 113700617 A CN113700617 A CN 113700617A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/40—Ice detection; De-icing means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/30—Lightning protection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention provides a horizontal axis wind generating set blade tip ice preventing and removing device and an installation method, wherein the device comprises a device connecting body, a heat collecting device support and a heat collecting device, wherein one end of the device connecting body is inserted in an inner cavity of a blade body area, and the other end of the device connecting body is inserted in an inner cavity of a blade tip area; the device connecting body is connected with the heat collecting device bracket; the heat collecting device is arranged on the heat collecting device bracket; the heat collecting device bracket and the heat collecting device are both positioned in the inner cavity of the tip region of the blade; the power line of the heat collecting device is arranged at one side close to the shear web at the front edge of the blade; the outer surface of the tip area of the blade is provided with a blade tip lightning-leading passage and is connected with a lightning-leading line; the lightning lead is arranged on one side of the shear web close to the trailing edge of the blade; insulating material layers are arranged on the inner surface of the device connecting body, the connecting surface of the heat collecting device bracket and the inner surface of the blade tip area; the invention can protect the heat collection device from being damaged by lightning in the working state, and simultaneously isolate the mutual influence between the power supply path of the heat collection device and the lightning flow guide path of the blade, thereby avoiding the safety threat of the blade caused by the discharge phenomenon of the lightning flow guide path.
Description
Technical Field
The invention relates to the field of wind generating sets, in particular to a horizontal axis wind generating set tip ice preventing and removing device and an installation method.
Background
China has broad breadth, various climatic environments, and the phenomenon of icing of the wind power plant in cold winter or early spring cannot be avoided. Icing conditions are mainly two-fold: moisture and low temperature. The ice fog phenomenon can also occur due to low relative humidity of air in the north, and accumulated snow is more easily formed; the relative humidity of the air in the south is high, so that the freezing rain phenomenon is mostly formed, and the freezing disaster range is more serious. The problem of icing always troubles wind power plants in various regions in China, and according to research data, a large number of service units in regions such as northwest, inner Mongolia, Heilongjiang, Liaoning, Hebei, Henan, Shandong, Hubei, Anhui, Yunnan, Guizhou, Sichuan and the like are affected by freezing environment, the problem of icing can cause the loss of 20-50% of generated energy at most, the service life of a wind generating set is shortened, and the life and property safety of surrounding personnel is threatened.
In the face of the urgent need for anti-icing technologies, the mainstream technical routes in the industry now include the following types:
1 thermal energy method, comprising electric heating and gas heating. The electric heating method is to radiate heat through a power-on resistor, improve the surface temperature of the wind power equipment and realize ice prevention and removal. The method has the advantages of high efficiency; the disadvantages are that the risk of lightning strike is very large, the installation is complex, the maintainability is poor, and the composite material structure is easy to damage such as fatigue delamination and aging. The air heating method is to form energy exchange through hot air circulation, improve the surface temperature of the wind power equipment and realize ice prevention and removal. The lightning protection device has the advantages of safe structure, easy maintenance and repair and no increase of lightning risk; the disadvantages are high energy consumption and low efficiency.
And 2, a chemical method is adopted, and chemical agents are sprayed on the frozen surface of the wind power equipment, so that the melting point of an ice layer mixture is reduced, and the deicing is realized. The method has the advantages of simplicity, convenience and effectiveness, and can be realized through unmanned aerial vehicle equipment; the disadvantage is that the environment is polluted to a certain extent.
And 3, a mechanical method is adopted, and external force or vibration action is applied to the ice layer attached to the wind power equipment through mechanical equipment or variable speed control, so that the deicing is realized. The advantages are that the method is simple, convenient and thorough, and can be realized by tools or equipment; the defect is that the normal operation of the wind power equipment is influenced, and certain damage can be caused to the wind power equipment.
4, coating a hydrophobic coating on the surface of the wind power equipment to accelerate the rolling of surface liquid, reduce the adhesive force of an ice layer and realize anti-icing. The advantages are low energy consumption for anti-icing and no pollution; the disadvantage is that the icing mode without liquid water has poor effect, and the coating is easy to be damaged.
Among many anti-icing methods, thermal methods are most direct and effective. But the prior art solutions are more or less limited. For a large wind turbine generator, the blade tip part of the large wind turbine generator is highest in position and fastest in linear speed, and is a key area easy to strike by lightning and cover ice; the partial force in the middle of the blade is the largest and is the key area to be deiced. The gas-heated deicing scheme is favored by vast whole machine manufacturers and anti-icing prevention technical scheme providers due to the operation feasibility and the system safety, a common system comprises a heat collecting device, an air blower, a flow guide pipe and the like, and based on the technical requirement of avoiding lightning stroke of electrical equipment, the heat collecting device and the air blower are both arranged in the area close to the root part of a blade or a hub, so that the air-heated deicing scheme is more convenient to install and overhaul in the air. However, the composite material has good heat-conducting property, and along with the increase of the length of the blade, heat can be quickly dissipated in the process that heated air flows in a guide pipe of a blade cavity under the condition of an icing environment, and when the heated air reaches the position of the blade leaf or even the position of the blade tip, the temperature of the shell of the blade cannot be increased by the heated air so as to generate the effective deicing effect; in order to resist severe environment, if the temperature setting of the heat collecting device is increased, the mechanical property of the composite material resin system can be influenced by the initial hot air with higher temperature, and risks are caused to the safety of the blade. Therefore, the best remedy scheme is to add an electric heating device at the blade tip position, so that on one hand, the temperature can be continuously and effectively controlled to supply heat, and the ice can be prevented and removed at the blade tip position; on one hand, the circulating air can be heated for the second time, the temperature of the blade shell at the position in the blade is increased, and the implementation effect of the whole blade anti-icing and deicing system is indirectly improved. However, most of the existing electric heating devices at the blade tip position are laid on the surface of the blade in a thin film mode, and the lightning guiding system covers the surface of the electric heating film, and because the thickness of each layer is very thin, short circuit is very easy to occur, the electric heating film is struck by lightning, and then related equipment is damaged, and even the structure of the blade is damaged. In addition, due to the limitation of the power of the electric heating film, the adjustability and adaptability to different icing environmental conditions are poor, and the deicing effect is not ideal. Therefore, it is necessary to improve and upgrade the existing blade gas-heating and electric-heating ice-preventing and removing system, and a blade tip ice-preventing and removing device and method are provided to ensure the design safety and reliability.
Disclosure of Invention
The invention aims to provide a blade tip ice preventing and removing device of a horizontal axis wind generating set and an installation method, which solve the defect that the existing blade tip ice removing mode has an unsatisfactory effect; the device and the method related to the patent can play a role in realizing the installation of the heating device at the blade tip position and protecting the safety of the blade. The design and research method of the device is mature, the process construction is easy to realize, the reliability is high, and the influence on the safety of the blade is small.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a horizontal axis wind generating set blade tip anti-icing device which comprises a device connecting body, a heat collecting device support and a heat collecting device, wherein one end of the device connecting body is inserted in an inner cavity of a blade body area, and the other end of the device connecting body is inserted in an inner cavity of a blade tip area;
the device connecting body is connected with the heat collecting device bracket; the heat collecting device is arranged on the heat collecting device bracket; the heat collecting device bracket and the heat collecting device are both positioned in the inner cavity of the tip region of the blade;
the power line of the heat collecting device is arranged at one side close to the shear web at the front edge of the blade;
the outer surface of the tip area of the blade is provided with a blade tip lightning-leading passage and is connected with a lightning-leading line; the lightning conductor is arranged on one side of the shear web close to the trailing edge of the blade.
Preferably, the device connecting body is connected with the heat collecting device bracket by adopting a contact extrusion type structure.
Preferably, the device connecting body is connected with the heat collecting device bracket through a connecting rivet.
Preferably, the heat collecting device bracket is connected with the heat collecting device by adopting a mechanical assembly type structure.
Preferably, the heat collecting device bracket is connected with the heat collecting device through welding, bolts or interference fit.
Preferably, the tip lightning strike passageway comprises a tip lightning receptor, a flow guiding passageway and a body tap line lightning receptor, wherein the tip lightning receptor is arranged at the tip part of the blade; the blade body tapping line lightning receptor is arranged at the positions, close to the trailing edge, of the windward side and the leeward side of the blade of the section where the blade body tapping line is located; the flow guide passage is arranged on the outer surface of the tip part area of the blade and is connected with the tip lightning receptor and the blade body tapping line lightning receptor; the blade body wiring lightning receptor is connected with a lightning lead.
Preferably, the device connector is of a variable-section single-cavity structure and is inserted into a cavity defined by the girder and the shear web.
Preferably, the inner surface of the device connecting body, the connecting surface of the heat collecting device bracket and the inner surface of the blade tip area are all provided with insulating material layers.
A method for installing a blade tip ice preventing and removing device of a horizontal axis wind generating set comprises the following steps:
step 4, connecting power lines of the heat collecting device, and arranging the power lines on one side close to the shear web of the front edge of the blade;
and 7, installing a blade drainage system, and sealing and packaging the surface contact line of the blade body area and the blade tip area.
Compared with the prior art, the invention has the beneficial effects that:
according to the blade tip ice prevention and removal device of the horizontal axis wind generating set, the power line of the heat collection device is arranged on one side close to the shear web at the front edge of the blade; the lightning guiding line of the lightning guiding passage is arranged on one side close to the shear web of the trailing edge of the blade; the lightning shielding space can be effectively formed in the tip part area of the blade, the working state of the heat collection device is protected from being damaged by lightning through customized geometry, materials and electrical design, meanwhile, the mutual influence between a power supply path of the heat collection device and a lightning flow guide path of the blade is isolated, and the phenomenon that the discharging phenomenon of the lightning flow guide path threatens the safety of the blade is avoided.
Furthermore, the device can effectively realize the regional outside thunder leading way of blade point portion, and the area is accepted to the increase thunder and lightning, effectively protects the regional thunder leading in-process of blade point portion self structure safety, reduces wind-powered electricity generation field fortune dimension cost.
Furthermore, the device can effectively solve the regional problem of preventing and removing ice of blade tip, can prevent and remove ice with current blade root electrical heating blast air simultaneously and combine together, promotes the regional effect of preventing and removing ice in blade middle part, realizes system optimization energy loss and unit income, improves blade availability ratio and unit security under the icing environment.
Furthermore, the device can effectively solve the safety problem that blade tip region weight increase leads to connection structure probably to appear, has reduced the connection structure design degree of difficulty, easily guarantees connection structure construction quality to the realization prevents and removes off the technical support of icing device long-term steady operation to the apex.
Drawings
FIG. 1 is a front view of a tip deicing assembly in accordance with the present invention;
FIG. 2 is a side view of a tip ice protection and removal device in accordance with the present invention;
FIG. 3 is a schematic view of a tip lightning strike path structure.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, the blade tip deicing device suitable for the horizontal axis wind turbine generator system provided by the invention comprises a device connector 1, a heat collecting device support 2, a connecting rivet 3 and a heat collecting device 4, wherein the device connector 1 is connected with the heat collecting device support 2; the heat collecting device 4 is arranged on the heat collecting device bracket 2.
The device connecting body 1 is connected with the heat collecting device bracket 2 by adopting a contact extrusion type structure.
The device connecting body 1 is connected with the heat collecting device support 2 through a connecting rivet 3.
The heat collecting device bracket 2 is connected with the heat collecting device 4 by adopting a mechanical assembly type structure.
The heat collecting device support 2 is connected with the heat collecting device 4 through welding, bolts or interference fit.
The device connection body 1, the blade body region 8 and the blade tip region 9 are all manufactured from a composite material.
With blade body branch line 7 as span to the position, divide into blade body region 8 and blade tip region 9 with the blade, all adopt the adhesive bonding mode to be connected between device connector 1 and blade body region 8 and the blade tip region 9.
In addition, be provided with apex thunder leading passageway on the regional 9 of blade point, apex thunder leading passageway includes apex arrester 10, water conservancy diversion passageway 11, blade body shunting line arrester 12, and the regional 9 casing surface apex thunder leading passageway of blade point of intercommunication each other is built, realizes shielding and protection to blade point portion electrical heating system.
The tip receptor 10 is arranged at the tip of the blade; the flow guide passage 11 is arranged on the outer surface of the shell of the blade tip region 9; the blade body tapping line lightning receptor 12 is arranged at the positions, close to the trailing edge, of the windward side and the leeward side of the blade of the section where the blade body tapping line 7 is located; all the diversion passages 11 are connected with the blade tip lightning receptor 10 and the blade body tapping line lightning receptor 12; the blade body tap lightning receptor 2 is connected with a lightning conductor in the blade body region 8.
The structural form and the function of each part of the invention are described as follows:
structural form of the device interface 1: the variable cross-section single-cavity structure of the composite material is characterized in that the spanwise cross section of the single-cavity structure is rectangular, and chamfer transition is designed between adjacent surfaces; the composite material blade is arranged in a composite material blade body area 8 and a blade tip area 9, and is specifically inserted into a cavity defined by a main beam and a shear web; the connecting surface of the device connecting body 1 and the blade body is matched with the inner surface of the main beam.
The device connecting body 1 is provided with four outer surfaces, wherein two symmetrical outer surfaces are an upper bonding surface 5 and a lower bonding surface 6 respectively; the remaining two outer surfaces are non-adhesive surfaces.
The device connection body 1 is connected by an adhesive upper surface 5 and an adhesive lower surface 6, respectively a blade body region 8 and a blade tip region 9.
The bonding upper surface 5 and the bonding lower surface 6 are matched with the geometrical shapes of the inner surfaces of main beams of a blade body area 8 and a blade tip area 9 close to a blade body division line 7, so that two bonding surfaces are bonded simultaneously, and the structural adhesive meets the bonding thickness process requirement.
The non-adhesive surface of the connecting body 1 is not in contact with any surface of the blade body region 8 or the blade tip region 9, so that load transmission in a path other than the adhesive surface between the connecting body 1 and the blade body region 8 and the blade tip region 9 is avoided.
The non-adhesive surface of the connecting body 1 is connected with the heat collecting device support 2 in a contact extrusion mode through a connecting rivet 3.
The connecting body 1 is arranged: connecting the blade body region 8 and the blade tip region 9 together to realize load transfer; and the heat collecting device bracket 2 and the heat collecting device 4 are positioned and supported.
The device connector 1 has no bonding connection area in the structure, and adopts a layering mode of winding a single fiber bundle or circumferentially laying fiber fabrics. For the circumferential laying condition of the fiber fabric, the lapping positions of the layers are arranged in the bonding surface, the lapping positions of different layers are staggered layer by layer, and the distance meets the requirements of process documents.
The structural form of the heat collecting device bracket 2 is as follows: the supporting structure of the heat collecting device 4 is arranged on the non-bonding surface of the device connecting body 1 and is connected with the device connecting body 1 in a contact extrusion mode through a connecting rivet 3; and the heat collecting device 4 is connected with the heat collecting device in a mechanical assembly mode through welding, bolts, interference fit and the like. The function is as follows: the heat collecting device 4 is positioned and supported, and the distance from the heat collecting device 4 extending out of the end face of the device connector 1 is ensured to meet the technical requirements of lightning protection.
The structural form of the connecting rivet 3 is as follows: and the mechanical rivets are designed in pairs and are arranged at the joint of the non-bonding surface of the device connecting body 1 and the heat collecting device bracket 2. The function is as follows: connecting the device interface 1 and the thermal collector support 2.
Structural form of the heat collecting device 4: and the electric heating device is arranged on the heat collecting device bracket 2. The function is as follows: by supplying power, the blade tip region 9 is heated.
The blade tip lightning receptor 10 has the following structural form: and the metal lightning receptor is positioned at the tip part of the blade. The function is as follows: lightning is induced, and the blade structure is protected.
The structure form of the flow guide passage 11 is as follows: and the metal guide strips are positioned on the surfaces of the blades. The function is as follows: lightning is induced, and the blade structure is protected.
The structure form of the blade body tapping line lightning receptor 12 is as follows: and the metal lightning receptor is positioned on the section of the blade body connecting line 7. The function is as follows: lightning is induced, and the blade structure is protected.
In the contact area between the device connector 1 and the heat collecting device bracket 2, the connecting rivets 3 are symmetrically and uniformly distributed.
And insulating materials are paved between the contact surfaces of the device connector 1 and the heat collecting device bracket 2.
The connecting rivet 3 is coated with an insulating material.
The inner surface of the device connector 1 is paved with an insulating material.
The inner surface of the shell of the blade tip region 9 except for the region bonded to the device connection body 1 is coated with an insulating material.
The invention provides a blade tip ice prevention and removal method for a horizontal axis wind generating set, which comprises the following steps:
firstly, completing production manufacture or purchase of each component of the blade tip ice preventing and removing device, wherein the blade tip ice preventing and removing device comprises a device connector 1, a heat collecting device bracket 2, a connecting rivet 3, a heat collecting device 4, a blade tip lightning receptor 10, a flow guide passage 11 and a blade body tapping line lightning receptor 12;
secondly, punching holes at positions of the device connector 1 and the heat collecting device support 2 corresponding to the mounting connecting rivets 3, polishing and repairing the hole walls, paving insulating materials between contact surfaces of the device connector 1 and the heat collecting device support 2, coating the connecting rivets 3 with the insulating materials, mounting the connecting rivets 3, pouring sealant and curing, namely, completing the connection of the device connector 1 and the heat collecting device support 2 in a contact extrusion mode, and simultaneously playing a role in forming an insulating effect between the device connector 1 and the heat collecting device support 2;
thirdly, paving an insulating material on the inner surface of the device connector 1, conveying the connected device connector 1 and the heat collecting device support 2 from a cavity root region surrounded by a main beam and a shear web of the blade body region to a blade body tapping line 7 region through a guide tool, carrying out geometric matching rechecking on a bonding surface, adjusting the pre-bonding width through model repair, and ensuring that the posture of the blade tip ice preventing and removing device is within an allowable deviation range; coating structural adhesive on the bonding surface of the device connector 1 and the blade body area by using an auxiliary tool, bonding and positioning the device connector 1 and the blade body area by drawing the device connector 1 to an appointed posture, heating and curing to complete the bonding mode connection of the adhesive between the device connector 1 and the blade body area, and simultaneously playing a role in forming an insulation effect between the front edge cavity and the rear edge cavity of the blade due to the obstruction of the device connector 1;
fourthly, completing the connection of the mechanical assembly mode between the heat collecting device bracket 2 and the heat collecting device 4, completing the connection of a power line of the heat collecting device 4, arranging the power line at one side close to the shear web of the front edge of the blade, and fixing the power line at the height center position of the shear web of the front edge of the blade;
fifthly, paving an insulating material on the inner surface of the shell of the blade tip region 9 except the bonding region with the device connector 1, rechecking the geometric matching of the bonding surface, and adjusting the pre-bonding width by model repair to ensure that the mounting posture of the blade tip region is within an allowable deviation range; coating structural adhesive on the bonding surface of the device connector 1 and the blade tip region 9 by using an auxiliary tool, adjusting the blade tip region 9 to an appointed posture, realizing bonding and positioning between the device connector 1 and the blade tip region 9, heating and curing, completing the connection of the bonding mode of the adhesive between the device connector 1 and the blade tip region 9, and simultaneously playing a role of forming an insulating effect between the inner side and the outer side of the blade tip region 9;
sixthly, removing a lightning conductor of a tip part area 9 of the original blade, mounting a blade tip lightning receptor 10 at the tip part of the blade, paving a flow guide passage 11 on the outer surface of a shell of the tip part area 9 of the blade, mounting a pair of blade body branch line lightning receptors 12 at positions, close to the rear edge of the blade, of the windward side and the leeward side of the blade of the cross section where a blade body branch line 7 is located, connecting all the flow guide passages 11 with the blade tip lightning receptor 10 and the blade body branch line lightning receptor 12, and connecting the flow guide passages with a lightning conductor of an original blade body area 8 to form a lightning conductor outside the tip part area 9 of the blade. Arranging a lightning lead at one side close to the shear web of the trailing edge of the blade, and fixing the lightning lead at the height center of the shear web of the trailing edge of the blade; comparing with the fourth step, the effect of forming an insulation effect between the power line of the heat collecting device 4 and the lightning leading wire of the blade lightning receptor is achieved;
seventhly, completing the installation of a blade drainage system;
and eighthly, sealing and packaging the surface contact line of the blade body area 8 and the blade tip area 9.
The working principle of the wind generating set blade tip ice preventing and removing device related by the invention is described as follows:
when the blade runs under the low-temperature icing environment condition, the heat collecting device 4 is started to convert electric energy into heat energy, the temperature of the blade tip area 9 rises, air in the blade tip area 9 is heated incidentally, the effect of heating the blade body area 8 is achieved along with the flow of hot air, and the effect of preventing and removing ice of the blade is achieved. After the ambient temperature has risen, the heat collecting means 4 are closed.
The regional 9 thunder leading passageways of blade point portion arranges in the casing outside, can play shielding guard action to heat collection device 4 of the regional 9 inboard of blade point portion, keeps safe distance throughout between heat collection device 4 power cord and the blade lightning receptor thunder leading simultaneously, and the space sets up the separation of multilayer insulating material, guarantees that regional 9 of blade point portion prevents and removes ice system and blade lightning protection system and can do not work simultaneously and influence each other.
The technical requirements of the blade tip ice preventing and removing device of the wind generating set related by the invention can influence the safety and the reliability of the blade tip ice preventing and removing device, so the blade tip ice preventing and removing device is required to be taken as a part of the invention and is described as follows:
the blade is used as a slender variable-section beam structure, the section size of a cavity defined by a main beam and a shear web is changed along with the spanwise position, and the section size is gradually reduced from a blade root to a blade tip. The device comprises a connecting body 1, a bonding surface, a bonding area and a blade body area 9, wherein the bonding surface geometry of the connecting body 1 is customized according to the existing blade geometry, and the safety and the reliability of the connection of the blade body area 8 and the blade tip area 9 are ensured by designing the bonding area.
The non-bonding surface of the device connector 1 is not contacted with any surface of the blade, the structural safety of the blade shear web can be protected, the structural safety of the blade shear web is not required to be enhanced, and the construction difficulty is reduced.
Designing the distance between a blade body connecting wire 7 and a heat collecting device 4, modifying and building a lightning leading passage outside a blade tip region 9, and paving an insulating material on the inner surface of a shell of the blade tip region 9 except a region bonded with a device connecting body 1 to form a lightning shielding space of the blade tip region 9; the length of the heat collection device support 2 in the spanwise direction of the blades is designed, an insulating material is paved between the contact surfaces of the device connector 1 and the heat collection device support 2, and the connecting rivet 3 is coated with the insulating material, so that the heat collection device 4 is protected from being damaged by lightning in the working state.
Paving an insulating material on the inner surface of the device connecting body 1; the power line of the heat collection device 4 and the lightning lead of the blade tip region 9 are respectively arranged at two sides of the device connector 1 and respectively fixed at the height center position of the shear web at the front edge of the blade and the height center position of the shear web at the rear edge of the blade, so that the phenomenon of discharge caused by possible line damage is avoided, and the safety of the blade is protected.
The blade tip deicing device is high in designability, can effectively solve the problem that the blade tip region 9 deicing system and the blade lightning protection system work simultaneously to affect each other, protects the safety of the blade, and is suitable for blade assembly manufactured in sections or blade transformation in existing service.
The device and the method effectively realize the blade tip ice prevention and removal function of the horizontal axis wind generating set.
When the blade moves under the low-temperature icing environment condition, the heat collecting device is started to convert electric energy into heat energy, the temperature of the tip part area of the blade rises, air in the tip part area cavity of the blade is heated incidentally, and the effect of heating the blade body area is achieved along with the flow of hot air, so that the effect of preventing and removing ice of the blade is achieved. After the ambient temperature rises, the heat collection device is turned off.
The regional thunder leading passageway of blade point portion arranges in the casing outside, can play the shielding guard action to the heat collection device of the regional inboard of blade point portion, keeps safe distance throughout between heat collection device power cord and apex arrester, the arrester thunder leading of lobe of leaf simultaneously, guarantees that regional deicing system and the blade lightning protection system of preventing and removing of blade point portion can work simultaneously and not influence each other.
Claims (9)
1. The blade tip deicing device of the horizontal-axis wind generating set is characterized by comprising a device connecting body (1), a heat collecting device support (2) and a heat collecting device (4), wherein one end of the device connecting body (1) is inserted into an inner cavity of a blade body area (8), and the other end of the device connecting body is inserted into an inner cavity of a blade tip area (9);
the device connecting body (1) is connected with the heat collecting device bracket (2); the heat collecting device (4) is arranged on the heat collecting device bracket (2); the heat collecting device bracket (2) and the heat collecting device (4) are both positioned in the inner cavity of the blade tip region (9);
the power line of the heat collecting device (4) is arranged at one side close to the shear web at the front edge of the blade;
a blade tip lightning-leading passage is arranged on the outer surface of the blade tip area (9) and is connected with a lightning-leading line; the lightning conductor is arranged on one side of the shear web close to the trailing edge of the blade.
2. The blade tip deicing device of the horizontal-axis wind generating set according to claim 1, characterized in that the device connecting body (1) is connected with the heat collecting device bracket (2) by a contact extrusion type structure.
3. The blade tip deicing device of the horizontal axis wind generating set according to claim 1 or 2, characterized in that the device connecting body (1) is connected with the heat collecting device bracket (2) through a connecting rivet (3).
4. The blade tip deicing device of the horizontal-axis wind generating set according to claim 1, wherein the heat collecting device bracket (2) is connected with the heat collecting device (4) by adopting a mechanical assembly type structure.
5. The blade tip deicing device of the horizontal-axis wind turbine generator system according to claim 1 or 4, wherein the heat collecting device support (2) is connected with the heat collecting device (4) through welding, bolts or interference fit.
6. The device for deicing the blade tip of the horizontal-axis wind generating set according to claim 1, wherein the blade tip lightning guiding path comprises a blade tip lightning receptor (10), a diversion path (11) and a blade body tapping line lightning receptor (12), wherein the blade tip lightning receptor (10) is arranged at the blade tip; the blade body connecting wire lightning receptor (12) is arranged at the positions, close to the rear edge of the blade, of the windward side and the leeward side of the blade on the section where the blade body connecting wire (7) is located; the flow guide passage (11) is arranged on the outer surface of the tip region (9) of the blade and is connected with the blade tip lightning receptor (10) and the blade body tapping line lightning receptor (12); the blade body wiring lightning receptor (12) is connected with a lightning lead.
7. The anti-icing and deicing device for the blade tip of the horizontal axis wind generating set according to claim 1, wherein the device connector (1) is of a variable-section single-cavity structure and is inserted into a cavity defined by a main beam and a shear web.
8. The device for deicing the blade tip of the horizontal-axis wind generating set according to claim 1, wherein an insulating material layer is arranged on the inner surface of the device connecting body (1), the connecting surface of the heat collecting device bracket (2) and the inner surface of the blade tip region (9).
9. A method of installation based on the device of any one of claims 1-8, comprising the steps of:
step 1, connecting a device connector (1) with a heat collecting device bracket (2);
step 2, connecting the device connector (1) with the blade body region (8);
step 3, connecting the heat collecting device bracket (2) with the heat collecting device (4);
step 4, connecting a power line of the heat collecting device (4), and arranging the power line at one side close to the shear web of the front edge of the blade;
step 5, connecting the device connector (1) with the blade tip region (9);
step 6, installing a lightning guiding passage, connecting the lightning guiding passage with a lightning guiding line, and arranging the lightning guiding line at one side close to the shear web of the trailing edge of the blade;
and 7, mounting a blade drainage system, and sealing and packaging the surface contact line of the blade body area (8) and the blade tip area (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111102921.5A CN113700617A (en) | 2021-09-17 | 2021-09-17 | Blade tip anti-icing and deicing device of horizontal axis wind generating set and installation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111102921.5A CN113700617A (en) | 2021-09-17 | 2021-09-17 | Blade tip anti-icing and deicing device of horizontal axis wind generating set and installation method |
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| CN113700617A true CN113700617A (en) | 2021-11-26 |
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| CN202111102921.5A Pending CN113700617A (en) | 2021-09-17 | 2021-09-17 | Blade tip anti-icing and deicing device of horizontal axis wind generating set and installation method |
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| US6612810B1 (en) * | 1999-06-21 | 2003-09-02 | Lm Glasfiber A/S | Wind turbine blade with a system for deicing and lightning protection |
| CN107905962A (en) * | 2017-11-20 | 2018-04-13 | 浙江运达风电股份有限公司 | A kind of wind-power electricity generation blade deicing system of hot blast Electric radiant Heating Film Hybrid Heating |
| CN108223306A (en) * | 2017-12-29 | 2018-06-29 | 中国电力科学研究院有限公司 | A kind of outer lightning protection for being overlying on wind power generation unit blade surface connects sudden strain of a muscle device |
| US20200088172A1 (en) * | 2018-09-17 | 2020-03-19 | General Electric Company | Heating System and Method for a Jointed Wind Rotor Turbine Blade |
| CN112867865A (en) * | 2018-10-25 | 2021-05-28 | Lm风力发电公司 | Lightning protection of segmental wind turbine blades |
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2021
- 2021-09-17 CN CN202111102921.5A patent/CN113700617A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6612810B1 (en) * | 1999-06-21 | 2003-09-02 | Lm Glasfiber A/S | Wind turbine blade with a system for deicing and lightning protection |
| CN107905962A (en) * | 2017-11-20 | 2018-04-13 | 浙江运达风电股份有限公司 | A kind of wind-power electricity generation blade deicing system of hot blast Electric radiant Heating Film Hybrid Heating |
| CN108223306A (en) * | 2017-12-29 | 2018-06-29 | 中国电力科学研究院有限公司 | A kind of outer lightning protection for being overlying on wind power generation unit blade surface connects sudden strain of a muscle device |
| US20200088172A1 (en) * | 2018-09-17 | 2020-03-19 | General Electric Company | Heating System and Method for a Jointed Wind Rotor Turbine Blade |
| CN112867865A (en) * | 2018-10-25 | 2021-05-28 | Lm风力发电公司 | Lightning protection of segmental wind turbine blades |
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Application publication date: 20211126 |