CN116857289A - Insulating flange plate for blocking shaft current and application thereof - Google Patents
Insulating flange plate for blocking shaft current and application thereof Download PDFInfo
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- CN116857289A CN116857289A CN202310566793.2A CN202310566793A CN116857289A CN 116857289 A CN116857289 A CN 116857289A CN 202310566793 A CN202310566793 A CN 202310566793A CN 116857289 A CN116857289 A CN 116857289A
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- insulating
- flange
- split
- split flange
- shaft current
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- 230000000903 blocking effect Effects 0.000 title claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 53
- 230000007246 mechanism Effects 0.000 claims abstract description 48
- 238000002955 isolation Methods 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 5
- 239000003973 paint Substances 0.000 claims description 4
- 239000000565 sealant Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 229910001141 Ductile iron Inorganic materials 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 8
- 239000011810 insulating material Substances 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- F03D15/00—Transmission of mechanical power
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/076—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end by clamping together two faces perpendicular to the axis of rotation, e.g. with bolted flanges
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention belongs to the technical field of wind driven generator protection, and particularly discloses an insulating flange plate for blocking shaft current and application thereof, wherein the insulating flange plate adopts a split structure and comprises a first split flange, a second split flange and a transmission channel insulating isolation layer arranged between the first split flange and the second split flange and used for blocking shaft current; and the three are connected through a transmission insulating fastening assembly consisting of a plurality of bolt connecting mechanisms and a taper pin transmission mechanism, so as to play a role of double insurance. The insulating flange plate adopts a split structure, and the flow path of shaft current is directly blocked by arranging the insulating isolation layer; meanwhile, the problem that bolts are easily sheared due to fatigue deformation of insulating materials when the flange plate transmits huge torque, so that the stator and rotor bores are swept is solved through different types of transmission insulating fastening components; the insulating flange is arranged in the super-compact semi-direct-drive wind driven generator, so that the transmission chain gear box bearing is protected from the damage of shaft current electric corrosion, and the service life is prolonged.
Description
Technical Field
The invention belongs to the technical field of wind driven generator protection, and particularly relates to an insulating flange for blocking shaft current and application thereof.
Background
In recent years, due to the shortage of global energy and the enhancement of environmental awareness, various countries are gradually focusing attention on clean energy, and wind energy plays an increasingly important role as a clean, renewable energy in national strategy. And as the wind power project of the large foundation of China comes to plan and build the climax again, the new situation of wind power development is started, and the comprehensive price-reducing era is entered. However, as raw material prices rise rapidly, wind turbine generator set costs also encounter serious challenges. The semi-direct-drive wind driven generator has the characteristics of the doubly-fed wind driven generator and the direct-drive wind driven generator, and has the advantages of high reliability, high transmission efficiency, long service life, various layout forms, capability of meeting different wind field requirements and the like, so that the semi-direct-drive wind driven generator is a main technical route for reducing cost and enhancing efficiency and improving competitiveness of wind power main machine enterprises at present.
In the conventional semi-direct-drive wind driven generator structure, as shown in fig. 1, when the motor runs, shaft current is generated between two bearing ends or between a motor rotating shaft and a bearing due to rotor eccentricity, uneven air gap, unbalanced magnetic circuit, adoption of a converter and the like of the motor. When the shaft current of the motor is large to a certain extent, the motor bearing is hot, the bearing or the shaft diameter is scared or spotted (electric corrosion) and even burns out, fine metal particles can be generated to enter bearing lubricating grease or oil, so that the bearing is worn, the service life of the bearing is greatly shortened, and especially for offshore units, the direct economic loss caused by the bearing is over million. Therefore, in wind power generators, insulation measures must be taken to prevent damage to the shaft current.
At present, the shaft current prevention mainly adopts the following two modes:
firstly, an insulating bearing is adopted in a shafting bearing, and the insulating bearing is formed by applying an insulating coating on an inner ring and/or an outer ring of the bearing or directly insulating rolling bodies, so that a capacitor structure can be formed, and the capacitor structure can isolate direct current from alternating current, and can avoid direct current electric corrosion but cannot avoid alternating current corrosion. In addition, the manufacturing cost of the insulated bearing is high, and the capacity and the cargo period can not meet the requirement of rapid development of the wind power market. In addition, through the practical surface, the insulating bearing has better insulating effect to the low frequency shaft current that motor itself produced, but to the high frequency shaft current that produces by the converter, its insulating effect can't guarantee, still can appear the electric corrosion phenomenon after long-time use.
And secondly, the grounding carbon brush is arranged at the driving end and the non-driving end, the grounding carbon brush is connected to the end cover by a grounding wire, and shaft current is introduced into the ground through the end cover by the machine base, so that the bearing is prevented from being corroded electrically. The method for eliminating the shaft current is to connect to the ground nearby, and the shaft current passes through the whole machine base from the carbon brush to the ground point, but the problem that the shaft current corrodes the bearing after the generator runs for a long time can not be effectively eliminated.
And the above way of preventing shaft current is difficult to be used in a new generation of super compact semi-direct drive wind driven generator because it eliminates the generator shafting (bearing + support + rotating member), and the generator stator and rotor are directly mounted on the drive chain gearbox, so what is needed to be protected is the drive chain gearbox bearing.
In view of the above, the present inventors have proposed an insulating flange for blocking shaft current and an application thereof, so as to overcome the drawbacks of the prior art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an insulating flange for blocking shaft current and application thereof, and the invention improves the traditional integral flange into a split insulating flange with an insulating isolation layer, and blocks a shaft current channel, thereby blocking a shaft current flow path; simultaneously, the two split flanges are connected into a whole by adopting the insulating taper pin, so that the eccentric phenomenon caused by the processing precision problem can be well solved, and the taper pin and the split flanges can be in line contact or partial surface contact when the nut at the taper pin is fastened, so that the safety coefficient of transmission is increased, the novel split flange is particularly suitable for super-compact semi-direct-drive wind driven generators, and the transmission sprocket box bearing is protected.
The invention aims at solving the problems by the following technical scheme:
the invention provides an insulating flange for blocking shaft current, which adopts a split structure and comprises a first split flange, a second split flange and an insulating isolation layer arranged between the first split flange and the second split flange, wherein the insulating isolation layer is used for blocking a transmission channel of the shaft current;
the first split flange, the second split flange and the insulating isolation layer respectively penetrate through the mounting hole of the first split flange outer ring, the prefabricated via hole of the insulating isolation layer and the mounting hole of the second split flange inner ring to connect the first split flange outer ring, the prefabricated via hole of the insulating isolation layer and the mounting hole of the second split flange inner ring into a whole through transmission insulating fastening components.
Further, the insulating isolation layer comprises an insulating plate and an insulating ring, the insulating plate is arranged between the end face of the second split flange and the radial step face of the first split flange, and the insulating ring is arranged between the inner annular face of the second split flange and the axial step face of the first split flange.
Further, the transmission insulating fastening assembly consists of a plurality of bolt connection mechanisms and a plurality of taper pin transmission mechanisms, and the bolt connection mechanisms and the taper pin transmission mechanisms are arranged at the positions of the mounting holes of the outer ring of the first split flange and the mounting holes of the inner ring of the second split flange at intervals.
Further, the bolt connection mechanism comprises a hexagon head bolt, a first gasket, a bolt sleeve and a first insulating sleeve, wherein the hexagon head bolt sequentially penetrates through the first gasket, the bolt sleeve, the first split flange and the insulating isolation layer and then is in threaded connection with the second split flange, and the first insulating sleeve is arranged between the hexagon head bolt and a mounting hole of an outer ring of the first split flange and transmits main torque through static friction force generated after the bolt connection mechanism is fastened.
Further, the cross section of the first insulating sleeve is of a hollow T-shaped structure.
Further, the taper pin transmission mechanism comprises a step pin with a threaded head, a second gasket, a taper pin sleeve, a second insulation sleeve, a lock washer and a hexagonal nut matched and connected with the threaded head of the step pin, the step pin sequentially penetrates through the second gasket, the second split flange and the lock washer of the first split flange and then is in threaded connection with the hexagonal nut, the taper pin sleeve is arranged between the taper hole of the first split flange and the step pin, a second insulation sleeve is arranged between the taper pin sleeve and the taper hole of the first split flange, and a plurality of taper pin transmission mechanisms are used for transmitting secondary torque and preventing failure of bearing shear after sliding of the bolt connection mechanism.
Further, the taper of the taper pin sleeve is larger than or equal to the taper of the taper hole of the first split flange, so that the taper pin sleeve is conveniently extruded through the hexagonal nut to lock the insulating flange plate.
Further, the insulating plate, the insulating ring, the first insulating sleeve and the second insulating sleeve are all made of EPGC materials;
the first split flange and the second split flange are respectively made of spheroidal graphite cast iron.
Furthermore, the insulating gaps of the insulating flange plates are filled with sealant and/or sealing paint for preventing discharge and creepage phenomena at the insulating gaps.
On the other hand, the invention provides an application based on the insulating flange, and the insulating flange is applied to a super-compact semi-direct-drive wind driven generator and is used for blocking a flow path of shaft current and protecting a transmission sprocket gear box bearing.
Compared with the prior art, the invention has the following beneficial effects:
the insulating flange for blocking the shaft current and the application thereof provided by the invention have the advantages that the existing integral structure is improved into the split insulating flange with the insulating isolation layer, the flow path of the shaft current is directly blocked, the risk that the super-compact semi-direct-drive wind driven generator is subjected to shaft current electrolytic corrosion is avoided, the gear box bearing of the transmission chain is protected, and compared with an insulating bearing or a grounding device, the insulating flange is simple in structure and low in cost; meanwhile, when the three parts (the first split flange, the second split flange and the insulating isolation layer) are connected, a transmission insulating fastening assembly consisting of a plurality of bolt connecting mechanisms and a plurality of taper pin transmission mechanisms is adopted for connection, wherein the taper pin transmission mechanisms play roles in two aspects: firstly, torque is transmitted together with static friction force of a bolt before the bolt connecting mechanism is not loosened, so that stability of torque transmission is enhanced; the conical pin transmission mechanism is adopted to better connect the two split flanges into a whole, and the conical pin transmission mechanism is characterized in that when the hexagonal nut is matched and fastened with the step pin, the hexagonal nut can generate line contact or partial surface contact with the conical pin sleeve and the split flange, so that even if the bolt connection mechanism loosens after an insulating material is aged, the conical pin transmission mechanism can independently transmit torsion, the reliability of transmitting torsion is ensured, the occurrence of bolt shearing and stator-rotor bore sweeping accidents (the static friction force is smaller than the transmission torque), and the safety coefficient of transmission is increased. The invention has the following advantages:
firstly, the insulating isolation layer is made of EPGC203 (epoxy glass cloth laminated tube) or EPGC308 (epoxy glass cloth laminated plate) materials, the materials have higher high-temperature mechanical strength and excellent oil resistance and corrosion resistance, and the matched parts are machined to ensure the precision;
secondly, the insulating flange plate is filled with sealant and/or sealing paint in an assembly gap needing insulation, so as to prevent discharge and creepage phenomena at the insulation gap;
the split structure is connected by adopting a mode of combining the conical pin transmission mechanism with larger diameter and the bolt connection mechanism, so that the mechanical compression strength of the insulating isolation layer can be sufficiently reduced, and the mechanical torque can be transmitted.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate principles of the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of an anti-shaft current structure adopted by a conventional half-direct-drive wind driven generator;
FIG. 2 is a schematic view of a prior art unitary flange construction;
FIG. 3 is a schematic view of the assembled side structure of the insulating flange plate of the present invention;
FIG. 4 is a schematic view of the structure of the other side of the insulating flange plate of the present invention after assembly;
FIG. 5 is an exploded view of the insulating flange of the present invention;
FIG. 6 is a schematic front view of an insulating flange in accordance with the present invention;
FIG. 7 is a schematic cross-sectional view of A-A in FIG. 6;
FIG. 8 is an enlarged schematic view of portion B of FIG. 7;
FIG. 9 is a schematic cross-sectional view of C-C of FIG. 6;
FIG. 10 is an enlarged schematic view of portion D of FIG. 9;
FIG. 11 is a schematic diagram of an application structure of the insulating flange plate in the super-compact semi-direct-drive wind driven generator.
Wherein: 1 is a first split flange; 2 is a second split flange; 3 is an insulating isolation layer; 4 is a transmission insulation fastening component; 31 is an insulating plate; 32 is an insulating ring; 41 is a bolt connection mechanism; 42 is a taper pin drive mechanism; 411 is a hex head bolt; 412 is a first gasket; 413 is a bolt sleeve; 414 is a first insulating sleeve; 421 is a step pin; 422 is a second gasket; 423 is a taper pin sleeve; 424 is a second insulating sleeve; 425 is a lock washer; 426 is a hex nut; XY1 is a rotation axis; XY2 is the bearing; XY3 is the end cap; XY4 is the rotor support; YX5 is a stand; XY6 is a flange; XY7 is a grounding carbon brush; XY8 is a ground ring; XY9 is a brake disc; XY10 is the transition disk; XY11 is the cooler; BSQ1 is the output shaft of the gearbox; BSQ2 is the rotor of the generator; BSQ3 it is the stator of the generator; BSQ is a cover of the gearbox; BSQ5 is an insulating flange.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of devices consistent with aspects of the invention that are described in detail in the accompanying patent claims.
The present invention will be described in further detail below with reference to the drawings and examples for better understanding of the technical solutions of the present invention to those skilled in the art.
Referring to fig. 2 to 11, the insulating flange for blocking shaft current provided by the invention adopts a split design compared with a traditional integral structure, and comprises a first split flange 1 and a second split flange 2, wherein an insulating isolation layer 3 is added between the first split flange and the second split flange, and a transmission channel of shaft current is blocked through the insulating isolation layer 3; meanwhile, the first split flange 1 and the second split flange 2 are made of high-strength materials, such as ductile iron. Therefore, the insulating flange plate not only has the same structural strength as the traditional flange plate, but also has the function of preventing shaft current.
The first split flange 1 is of a hollow structure, the outer ring is of a step shape, the second split flange 2 is of a ring structure, the inner ring surface of the second split flange 2 is in clearance fit with the step of the outer ring of the first split flange 1, in addition, mounting holes uniformly distributed in the inner ring and the outer ring are respectively formed in the first split flange 1 and the second split flange 2, the mounting holes of the inner ring of the first split flange 1 are used for being connected with an output shaft BSQ1 of a gear box, the mounting holes of the outer ring of the second split flange 2 are used for being connected with a rotor BSQ2 of a generator, and the first split flange 1, the second split flange 2 and an insulating isolation layer 3 are connected into a whole after penetrating through the mounting holes of the outer ring of the first split flange 1, the prefabricated through holes of the insulating isolation layer 3 and the mounting holes of the inner ring of the second split flange 2 through transmission insulating fastening components 4. During implementation, after the first split flange 1 and the second split flange 2 are assembled, the first split flange 1 is subjected to finish machining, so that coaxiality and runout of the matched seam allowance of the insulating flange plate are guaranteed to meet technical requirements.
Specifically, as shown in fig. 5, 7 and 9, the insulating layer 3 in the embodiment of the present invention is composed of two parts, namely an insulating plate 31 and an insulating ring 32; wherein, the insulation board 31 sets up between the terminal surface of second components of a whole that can function independently flange 2 and the radial step face of first components of a whole that can function independently flange 1, and insulating ring 32 sets up in the clearance department between the interior anchor ring of second components of a whole that can function independently flange 2 and the axial step face of first components of a whole that can function independently flange 1, and insulation board 31 and insulating ring 32 close contact or both are integrated into one piece structure to in order to realize the insulating isolation of first components of a whole that can function independently flange 1 and second components of a whole that can function independently flange 2 in axial and radial, prevent the transmission shaft electric current between the two.
It should be noted that, since the insulating flange needs to transmit a large torque, reliability and stability of the connection between the two split flanges need to be ensured. Therefore, when the first split flange 1 and the second split flange 2 are connected, the transmission insulating fastening assembly 4 consisting of a plurality of bolt connecting mechanisms 41 and a plurality of taper pin transmission mechanisms 42 is adopted for connection, the bolt connecting mechanisms 41 and the taper pin transmission mechanisms 42 are arranged at the positions of the mounting holes of the outer ring of the first split flange 1 and the mounting holes of the inner ring of the second split flange 2 at intervals, and meanwhile, the diameter of a bearing part of the taper pin transmission mechanisms 42 is required to be larger than that of the bearing part of the bolt connecting mechanisms 41. Specifically, as shown in fig. 6 of the embodiment, the insulating flange plate is composed of eight taper pin transmission mechanisms 42 and thirty-two bolt connection mechanisms 41 when connected, four bolt connection mechanisms 41 are equidistantly arranged between every two adjacent taper pin transmission mechanisms 42, and the diameter of a transmission pin of each taper pin transmission mechanism 42 is larger than that of a bolt of each bolt connection mechanism 41, so that the bearing area is large, the mechanical compression strength requirement on an insulating isolation layer is reduced, and the transmission of mechanical torque of a motor is realized.
Specifically, as shown in fig. 7 and 8, the bolt connection mechanism 41 according to the embodiment of the present invention includes a hexagon head bolt 411, a first washer 412, a bolt sleeve 413, and a first insulating sleeve 414; when the split type torque-transmitting device is used, the hexagon head bolt 411 sequentially passes through the first gasket 412, the bolt sleeve 413, the first split type flange 1 and the insulating isolation layer 3 and then is in threaded connection with the second split type flange 2, the first insulating sleeve 414 is arranged between the hexagon head bolt 411 and the mounting hole of the outer ring of the first split type flange 1, and static friction force generated between the first split type flange 1 and the insulating isolation layer 3 and between the second split type flange 2 and the insulating isolation layer 3 after being fastened through the plurality of bolt connecting mechanisms 41 is used for transmitting main torque.
Preferably, the cross section of the first insulating sleeve 414 in the embodiment is a hollow T-shaped structure, i.e. the first insulating sleeve 414 has a circle of folds.
The taper pin transmission mechanism 42 adopted in the embodiment of the invention is shown in fig. 9 and 10, and the taper pin transmission mechanism 42 comprises a step pin 421 with a threaded head, a second washer 422, a taper pin sleeve 423, a second insulation sleeve 424, a locking washer 425 and a hexagonal nut 426 which is in fit connection with the threaded head of the step pin 421; when the anti-loosening device is used, the step pin 421 sequentially passes through the second gasket 422, the second split flange 2 and the first split flange 1 anti-loosening gasket 425 and then is in threaded connection with the hexagonal nut 426, meanwhile, the taper pin sleeve 423 is arranged between the taper hole of the first split flange 1 and the step pin 421, the second insulation sleeve 424 is arranged between the taper pin sleeve 423 and the taper hole of the first split flange 1, and the plurality of taper pin transmission mechanisms 42 are used for transmitting secondary torque and preventing failure of bearing shear after the bolt connection mechanism 41 slides.
Preferably, in this embodiment, the taper of the taper pin sleeve 423 is greater than or equal to the taper of the taper hole of the first split flange 1, so that when the hexagonal nut 426 is locked with the step pin 421 in a matched manner, the hexagonal nut 426 continuously presses the taper pin sleeve 423, and in addition, the taper pin sleeve 423 and the first split flange 1 generate line contact or local surface contact under the self-centering action of the taper, so that the transmission safety factor is increased.
The insulating plate 31, the insulating ring 32, the first insulating sleeve 414 and the second insulating sleeve 424 in the insulating flange plate are all made of EPGC materials, for example, EPGC203 (epoxy glass cloth laminated tube) or EPGC308 (epoxy glass cloth laminated plate) can be used for manufacturing corresponding parts, and the EPGC insulating materials are selected because the EPGC insulating materials have higher high-temperature mechanical strength and excellent oil resistance and corrosion resistance, and the matched parts adopt machining to ensure the precision. In addition, the insulating flange plate is filled with sealant and/or sealing paint in the assembly gap, so that discharge and creepage phenomena at the insulating gap are prevented, and dielectric strength is ensured.
As shown in fig. 11, another aspect of the present invention provides an application of the insulating flange BSQ to a super-compact (compared with the existing compact, the generator shafting (bearing+support+rotating member) is omitted) semi-direct-drive wind driven generator, so as to block the flow path of the shaft current and protect the transmission sprocket box bearing, wherein the mounting hole of the inner ring of the first split flange) is fixedly connected with the output shaft BSQ1 of the gear box, and the mounting hole of the outer ring of the second split flange 2 is fixedly connected with the rotor SQ2 of the generator.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It will be understood that the invention is not limited to what has been described above and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. The insulating flange for blocking shaft current is characterized by adopting a split structure and comprising a first split flange (1), a second split flange (2) and an insulating isolation layer (3) arranged between the first split flange (1) and the second split flange (2), wherein the insulating isolation layer (3) is used for blocking a transmission channel of shaft current;
the novel electric generator comprises a first split flange (1) and a second split flange (2), wherein an inner ring and an outer ring of mounting holes are formed in the first split flange (1) and the second split flange (2) respectively, the mounting holes of the inner ring of the first split flange (1) are used for being connected with an output shaft (BSQ 1) of a gear box, the mounting holes of the outer ring of the second split flange (2) are used for being connected with a rotor (BSQ) of the generator, and the first split flange (1), the second split flange (2) and an insulating isolation layer (3) respectively penetrate through the mounting holes of the outer ring of the first split flange (1), the prefabricated through holes of the insulating isolation layer (3) and the mounting holes of the inner ring of the second split flange (2) through transmission insulating fastening components (4) to form a whole.
2. An insulating flange for blocking shaft current according to claim 1, characterized in that the insulating isolation layer (3) comprises an insulating plate (31) and an insulating ring (32), the insulating plate (31) is arranged between the end face of the second split flange (2) and the radial step face of the first split flange (1), and the insulating ring (32) is arranged between the inner ring face of the second split flange (2) and the axial step face of the first split flange (1).
3. An insulating flange for blocking shaft current according to claim 2, characterized in that the transmission insulating fastening assembly (4) consists of a plurality of bolt connection mechanisms (41) and a plurality of taper pin transmission mechanisms (42), and the two transmission insulating fastening assemblies are arranged at the positions of the mounting holes of the outer ring of the first split flange (1) and the mounting holes of the inner ring of the second split flange (2) at intervals.
4. An insulating flange for blocking shaft current according to claim 3, wherein the bolt connection mechanism (41) comprises a hexagonal bolt (411), a first washer (412), a bolt sleeve (413) and a first insulating sleeve (414), the hexagonal bolt (411) sequentially penetrates through the first washer (412), the bolt sleeve (413), the first split flange (1) and the insulating isolation layer (3) and then is in threaded connection with the second split flange (2), and the first insulating sleeve (414) is arranged between the hexagonal bolt (411) and a mounting hole of an outer ring of the first split flange (1) and transmits main torque through static friction force generated after the fastening of a plurality of bolt connection mechanisms (41).
5. An insulating flange for blocking shaft currents according to claim 4, characterised in that the first insulating sleeve (414) is of hollow T-shaped configuration in cross section.
6. The insulating flange plate for blocking shaft current according to claim 4, wherein the taper pin transmission mechanism (42) comprises a step pin (421) with a threaded head, a second gasket (422), a taper pin sleeve (423), a second insulating sleeve (424), a lock washer (425) and a hexagonal nut (426) which is in fit connection with the threaded head of the step pin (421), the step pin (421) sequentially passes through the second gasket (422), the second split flange (2), the first split flange (1) and the lock washer (425) and then is in threaded connection with the hexagonal nut (426), the taper pin sleeve (423) is arranged between the taper hole of the first split flange (1) and the step pin (421), and a second insulating sleeve (424) is arranged between the taper pin sleeve (423) and the taper hole of the first split flange (1), and a plurality of taper pin transmission mechanisms (42) are used for transmitting secondary torque and preventing failure of sliding shear of the bolt connection mechanism (41).
7. The insulating flange for blocking shaft current according to claim 6, wherein the taper of the tapered pin sleeve (423) is greater than or equal to the taper of the tapered hole of the first split flange (1), so that the tapered pin sleeve (423) is pressed by the hexagonal nut (426) to lock the insulating flange.
8. An insulating flange for blocking shaft current according to claim 6, characterized in that the insulating plate (31), insulating ring (32), first insulating sleeve (414) and second insulating sleeve (424) are all made of EPGC material;
the first split flange (1) and the second split flange (2) are respectively made of spheroidal graphite cast iron.
9. An insulating flange for blocking shaft current according to any of claims 1-8, wherein the insulating gaps of the insulating flange are filled with a sealant and/or a sealing paint for preventing discharge and creepage phenomena at the insulating gaps.
10. The application of the insulating flange plate according to any one of claims 1 to 9, wherein the insulating flange plate is applied to a super-compact semi-direct-drive wind driven generator and is used for blocking a flow path of shaft current and protecting a transmission sprocket gear box bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310566793.2A CN116857289A (en) | 2023-05-19 | 2023-05-19 | Insulating flange plate for blocking shaft current and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310566793.2A CN116857289A (en) | 2023-05-19 | 2023-05-19 | Insulating flange plate for blocking shaft current and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116857289A true CN116857289A (en) | 2023-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310566793.2A Pending CN116857289A (en) | 2023-05-19 | 2023-05-19 | Insulating flange plate for blocking shaft current and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116857289A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120955960A (en) * | 2025-10-15 | 2025-11-14 | 德州恒力电机有限责任公司 | A shaft-driven generator based on permanent magnet technology |
-
2023
- 2023-05-19 CN CN202310566793.2A patent/CN116857289A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120955960A (en) * | 2025-10-15 | 2025-11-14 | 德州恒力电机有限责任公司 | A shaft-driven generator based on permanent magnet technology |
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