CN115355295A - Transmission chain of wind generating set, wind generating set and single-blade barring method - Google Patents

Transmission chain of wind generating set, wind generating set and single-blade barring method Download PDF

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Publication number
CN115355295A
CN115355295A CN202210981213.1A CN202210981213A CN115355295A CN 115355295 A CN115355295 A CN 115355295A CN 202210981213 A CN202210981213 A CN 202210981213A CN 115355295 A CN115355295 A CN 115355295A
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China
Prior art keywords
speed
wind
synchronous generator
gear
gearbox
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CN202210981213.1A
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Chinese (zh)
Inventor
孙永岗
康鹏举
许移庆
蒋勇
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Shanghai Electric Wind Power Group Co Ltd
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Shanghai Electric Wind Power Group Co Ltd
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Application filed by Shanghai Electric Wind Power Group Co Ltd filed Critical Shanghai Electric Wind Power Group Co Ltd
Priority to CN202210981213.1A priority Critical patent/CN115355295A/en
Publication of CN115355295A publication Critical patent/CN115355295A/en
Pending legal-status Critical Current

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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
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
    • F16H37/124—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types for interconverting rotary motion and reciprocating motion
    • 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
    • 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
    • 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
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/0244—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor for braking
    • 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
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • F03D9/255—Wind motors characterised by the driven apparatus the apparatus being an electrical generator connected to electrical distribution networks; Arrangements therefor
    • 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
    • F16H—GEARING
    • F16H48/00—Differential gearings
    • F16H48/06—Differential gearings with gears having orbital motion
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/035—Gearboxes for gearing with endless flexible members
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/037—Gearboxes for accommodating differential gearings
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/08—General details of gearing of gearings with members having orbital motion
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02034—Gearboxes combined or connected with electric machines
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02039—Gearboxes for particular applications
    • F16H2057/02078—Gearboxes for particular applications for wind turbines
    • 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)
  • Power Engineering (AREA)
  • Wind Motors (AREA)

Abstract

The invention provides a transmission chain of a wind generating set, the wind generating set and a single-blade barring method, and belongs to the technical field of wind power generation. The transmission chain of the wind generating set comprises a differential planet speed regulating gear box, a synchronous generator and a speed regulating motor, wherein the differential planet speed regulating gear box is provided with a first input end and a second input end, the first input end is used for being connected with a wind wheel of the wind generating set, the second input end is used for being connected with the output end of the speed regulating motor, the output end of the differential planet speed regulating gear box is connected with the input end of the synchronous generator, and the speed regulating motor and the synchronous generator are both positioned on one side, far away from the wind wheel, of the differential planet speed regulating gear box. The whole transmission chain is more compact in structure and more reasonable in layout, and gear boxes driven by gears of different levels can be arranged between the transmission chain and the wind wheel for being suitable for different diameters of the wind wheel, so that the adaptability of the transmission chain is improved, and the application range of the transmission chain is expanded.

Description

Transmission chain of wind generating set, wind generating set and single-blade barring method
Technical Field
The invention relates to the technical field of wind power generation, in particular to a transmission chain of a wind generating set, the wind generating set and a single-blade barring method.
Background
The wind driven generator set mainly comprises a double-fed type, a semi-direct-drive type and a direct-drive type, however, the wind driven generator set of the three types needs to adopt a high-power converter to realize grid connection, and the cost is high. In the prior art, some technical means can realize direct grid connection of a synchronous generator. For example, chinese patent CN202215429U discloses a control system of differential gearbox speed regulation type synchronous wind turbine generator system, which adds a differential output stage of the gearbox at the output end of the three-stage gearbox, so that the electricity generated by the synchronous generator can be directly incorporated into the power grid. The three-stage gearbox adopted by the differential type synchronous generator is a two-stage planet plus one-stage parallel shaft gear, the one-stage parallel shaft gear is provided with a pinion protruding out of the two-stage planet, a servo motor and a conventional synchronous generator are conveniently arranged on two sides of a differential type output stage of the gearbox respectively, however, the structural layout has a specific application range, and the structural layout is not applicable to other gearboxes without protruding pinions.
Disclosure of Invention
The invention aims to solve the technical problem that in the prior art, a servo motor and a conventional synchronous generator in a transmission chain of a wind generating set are arranged on two sides of a differential output stage of a gear box, so that the structural layout limitation is large, and the transmission chain of the wind generating set, the wind generating set and a single-blade barring method are provided.
The invention solves the technical problems through the following technical scheme:
the utility model provides a wind generating set's driving chain, includes differential planet speed adjusting gear box, synchronous generator and buncher, differential planet speed adjusting gear box has first input and second input, first input be used for with wind generating set's wind wheel is connected, the second input be used for with buncher's output is connected, differential planet speed adjusting gear box's output with synchronous generator's input is connected, buncher with synchronous generator all is located differential planet speed adjusting gear box keeps away from one side of wind wheel.
In the scheme, the differential planetary speed regulating gearbox is provided with two input ends, namely a first input end and a second input end, wherein the first input end is connected with the wind wheel, and wind energy in the natural environment is converted into mechanical energy through the wind wheel to obtain initial power; the second input end is connected with the speed regulating motor, and because wind power is unstable, namely initial power is unstable, the rotating speed of the output end of the differential planet speed regulating gear box can be regulated through the speed regulating motor, the rotating speed is constant, the rotating speed of a rotor of the synchronous generator connected with the output end of the differential planet speed regulating gear box is constant, the electrical frequency output by the synchronous generator is constant, and the electrical frequency can be directly or through a second transformer incorporated into a power grid. The speed regulating motor and the synchronous generator are both positioned on one side of the differential planetary speed regulating gearbox far away from the wind wheel, so that the structure of the whole transmission chain is more compact, the layout is more reasonable, gear boxes driven by gears in different stages can be arranged between the transmission chain and the wind wheel for being suitable for different wind wheel diameters, the adaptability of the transmission chain is improved, and the application range of the transmission chain is expanded.
Preferably, the differential planetary speed-regulating gearbox includes a gear ring and a speed-regulating sun gear, an output shaft of the gear ring is connected with the synchronous generator, an input shaft of the speed-regulating sun gear is the second input end, and an input shaft of the speed-regulating sun gear is connected with an output end of the speed-regulating motor.
In the scheme, the output shaft of the gear ring is the output end of the differential planet speed regulating gear box, the input shaft of the speed regulating sun gear is the second input end of the differential planet speed regulating gear box, the speed regulating motor is used for driving the speed regulating sun gear to rotate, the rotation of the gear ring is regulated by regulating the rotation of the planet gear, the rotating speed of the gear ring reaches a constant preset value, the electric frequency output by the synchronous generator is constant, and the electric frequency can be directly or directly merged into a power grid through the second transformer.
Preferably, the speed regulation sun gear is arranged on the inner ring of the gear ring, the output shaft of the gear ring is a hollow shaft, and the input shaft of the speed regulation sun gear penetrates through the output shaft of the gear ring to be connected with the output end of the speed regulation motor.
In the scheme, the speed regulation sun gear is positioned at the inner ring of the gear ring, the input shaft of the speed regulation sun gear penetrates through the hollow output shaft of the gear ring, namely the output shaft of the gear ring is sleeved outside the input shaft of the speed regulation sun gear, so that the differential planetary speed regulation gear box is more compact in structure, the occupied space is reduced, and a synchronous generator connected with the output shaft of the gear ring and a speed regulation motor connected with the input shaft of the speed regulation sun gear are conveniently arranged at the same side of the differential planetary speed regulation gear box.
Preferably, the differential planet speed regulating gearbox further comprises a planet carrier and a planet wheel, the input shaft of the planet carrier is the first input end, the planet carrier drives the planet wheel to revolve, and the planet wheel is located between the speed regulating sun wheel and the gear ring and is in meshed connection with the speed regulating sun wheel and the gear ring.
In the scheme, the input shaft of the planet carrier is a first input end, so that the planet carrier is conveniently and directly or indirectly connected with the wind wheel; the planet carrier is used for driving the planet wheel to revolve, the speed regulation sun gear is meshed with the planet wheel, the planet wheel is driven by initial power from the wind wheel and is adjusted by adjusting power from the speed regulation motor, the rotating speed of the gear ring meshed with the planet wheel reaches a constant preset value, even if the rotating speed of a rotor of the synchronous generator connected with the gear ring reaches the constant preset value, the output electrical frequency is constant, and the planet wheel can be directly or be merged into a power grid through a second transformer.
Preferably, the synchronous generator is disposed between the differential planetary speed gearbox and the speed regulating motor.
In the scheme, the input end of the synchronous generator is connected with the hollow output shaft of the gear ring, the input shaft of the speed regulation sun gear penetrates through the hollow output shaft of the gear ring and the synchronous generator and then is connected with the input end of the speed regulation motor, namely the differential planet speed regulation gear box, the synchronous generator and the speed regulation motor are sequentially arranged along the same axis and the same direction, so that the structure is more compact, the layout is more reasonable, and the installation of a transmission chain on the wind power generation device is facilitated.
Preferably, an avoiding groove is formed in one side, facing the speed regulating motor, of the synchronous generator, and at least part of the speed regulating motor is located in the avoiding groove.
In this scheme, the buncher can be partly or all be located synchronous generator dodge the recess for distance between buncher and the synchronous generator is littleer, and the position of the two is compacter, further reduces the occupation of driving chain to the space.
Preferably, the drive train further comprises a basic planetary gearbox arranged between the wind rotor and the differential planetary speed gearbox.
In the scheme, the basic planetary gear box can accelerate the rotating speed of the wind wheel and output the rotating speed to the differential planetary speed regulating gear box, for example, under the condition that the rotating speed of the wind wheel is very low, the basic planetary gear box can input the lower rotating speed of the wind wheel and then output the higher rotating speed to the differential planetary speed regulating gear box, so that the input rotating speed of the first input end of the differential planetary speed regulating gear box is closer to the required rotating speed, the input of the second input end is reduced, and the rotating speed of the speed regulating motor is reduced.
Preferably, the basic planetary gearbox is one of a primary planetary gearbox, a secondary planetary gearbox or a tertiary planetary gearbox.
In this scheme, one-level planetary gear case, second grade planetary gear case and tertiary planetary gear case's simple structure, and all are commonly used planetary gear case, and basic planetary gear case adopts the gear box of above-mentioned form to be favorable to increasing the range of application of driving chain, and the cost is lower simultaneously.
A wind generating set comprises a wind wheel and further comprises the transmission chain of the wind generating set, and the wind wheel is connected with the input end of the transmission chain.
In the scheme, the wind wheel is connected with the input end of the transmission chain, and wind energy in the natural environment is converted into mechanical energy through the wind wheel. The speed regulating motor and the synchronous generator in the transmission chain are both positioned on one side of the differential planet speed regulating gear box far away from the wind wheel, so that the structure of the whole wind generating set is more compact, the layout is more reasonable, and gear boxes driven by gears in different stages can be arranged between the transmission chain and the wind wheel for being suitable for different wind wheel diameters, so that the assembly of the wind generating set is more convenient.
In the scheme, a differential planetary speed regulating gearbox of a wind generating set is provided with two input ends, namely a first input end and a second input end, wherein the first input end is connected with a wind wheel, and wind energy in the natural environment is converted into mechanical energy through the wind wheel to obtain initial power; the second input end is connected with the speed regulating motor, and the adjusting power is obtained, because wind power is unstable, namely initial power is unstable, the adjusting power provided by the speed regulating motor can adjust the rotating speed of the output end of the differential planet speed regulating gearbox, so that the rotating speed is constant, further the electric frequency output by the synchronous generator is constant, and the electric frequency can be directly merged into a power grid.
Preferably, the wind generating set further comprises a frequency converter and a first transformer, the speed regulating motor, the frequency converter and the first transformer are connected in sequence, and the first transformer is used for being connected with a power grid.
In the scheme, the speed regulating motor is connected with a power grid through the frequency converter and the first transformer, when the rotating speed of the wind wheel is low and the rotating speed of the output end of the transmission chain is lower than the rotating speed required by the synchronous generator, the power grid is equivalent to a power supply of the speed regulating motor, and the speed regulating motor can provide power for the transmission chain to enable the rotating speed of the output end of the transmission chain to reach the rotating speed required by the synchronous generator; when the rotating speed of the wind wheel is moderate, and the rotating speed of the output end of the transmission chain just reaches the rotating speed required by the synchronous generator, the speed regulating motor does not work, and the provided power is zero; when the rotating speed of the output end of the transmission chain is higher than the rotating speed required by the synchronous generator, the speed regulating motor is equivalent to a generator at the moment, part of initial power provided by the first input end can be consumed, the rotating speed of the output end of the transmission chain is reduced to the rotating speed required by the synchronous generator, and electric energy generated by the speed regulating motor is finally merged into a power grid through the frequency converter and the first transformer.
Preferably, the wind turbine generator system further includes a brake for stopping rotation of a rotor of the synchronous generator.
In this scheme, can stop the rotation of synchronous generator's rotor through starting brake to carry out wind generating set's installation or maintenance, convenient and fast.
A single-blade barring method is applicable to the wind generating set and comprises the following steps:
s1, before a hub of the wind wheel is rotated, the brake is started, and the synchronous generator is prevented from moving;
and S2, starting the speed regulating motor, and driving the hub to rotate by different angles through the transmission chain so as to respectively complete the installation of each blade of the wind wheel.
In the scheme, the blades of the wind wheel are installed by adopting a single-blade barring method, namely the blades of the wind wheel are installed one by one, the rotation of the rotor of the synchronous generator is stopped by starting a brake, and the synchronous generator stops working at the moment and does not generate electricity any more; and then starting a speed regulating motor, wherein a power grid is a power supply of the speed regulating motor, and the speed regulating motor drives the first input end of the differential planetary speed regulating gearbox to rotate so as to drive the hub of the wind wheel to rotate by different angles, so that the installation of each blade of the wind wheel is finished respectively.
The positive progress effects of the invention are as follows:
the differential planetary speed regulating gearbox is provided with two input ends, namely a first input end and a second input end, wherein the first input end is connected with a wind wheel, and wind energy in the natural environment is converted into mechanical energy through the wind wheel to obtain initial power; the second input end is connected with the speed regulating motor, and because wind power is unstable, namely initial power is unstable, the rotating speed of the output end of the differential planet speed regulating gear box can be regulated through the speed regulating motor, the rotating speed is constant, the rotating speed of a rotor of the synchronous generator connected with the output end of the differential planet speed regulating gear box is constant, the electrical frequency output by the synchronous generator is constant, and the electrical frequency can be directly or through a second transformer incorporated into a power grid. The speed regulating motor and the synchronous generator are both positioned on one side of the differential planetary speed regulating gearbox far away from the wind wheel, so that the structure of the whole transmission chain is more compact, the layout is more reasonable, and meanwhile, for the purpose of being suitable for different wind wheel diameters, gear boxes driven by gears in different stages can be arranged between the transmission chain and the wind wheel, the adaptability of the transmission chain is improved, and the application range of the transmission chain is expanded.
Drawings
Fig. 1 is a schematic view of a drive chain of a wind turbine generator set according to the present invention.
FIG. 2 is a schematic view of a three-stage planetary gearbox of a wind generating set of the present invention.
Fig. 3 is a schematic view of a wind turbine generator set according to the present invention.
FIG. 4 is a flow chart of a single blade barring method of the present invention.
Description of the reference numerals:
differential planetary speed-regulating gearbox 1
First input terminal 11
Second input terminal 12
Gear ring 13
Speed regulating sun gear 14
Planetary carrier 15
Planetary wheel 16
Synchronous generator 2
Avoiding groove 21
Speed regulating motor 3
Three-stage planetary gearbox 4
Primary planetary gear assembly 41
Primary planet carrier 411
Primary planet wheel 412
Primary ring gear 413
Primary sun gear 414
Two-stage planetary gear assembly 42
Two-stage planet carrier 421
Secondary planet wheel 422
Secondary gear ring 423
Second sun gear 424
Three-stage planetary gear assembly 43
Three-stage planet carrier 431
Three-stage planet wheel 432
Three-stage gear ring 433
Three-stage sun gear 434
Wind generating set 100
Wind wheel 101
Frequency converter 102
First transformer 103
Electric network 104
Detailed Description
The invention will be more clearly and completely illustrated by way of example in the accompanying drawings, without thereby limiting the scope of the invention to the described embodiment.
As shown in fig. 1-3, the present embodiment provides a transmission chain of a wind generating set 100, which includes a differential planetary speed-regulating gearbox 1, a synchronous generator 2, and a speed-regulating motor 3, where the differential planetary speed-regulating gearbox 1 has a first input end 11 and a second input end 12, the first input end 11 is used for being connected with a wind wheel 101 of the wind generating set 100, the second input end 12 is used for being connected with an output end of the speed-regulating motor 3, an output end of the differential planetary speed-regulating gearbox 1 is connected with an input end of the synchronous generator 2, and the speed-regulating motor 3 and the synchronous generator 2 are both located on a side of the differential planetary speed-regulating gearbox 1 away from the wind wheel 101. The differential planetary speed regulating gearbox 1 is provided with two input ends, namely a first input end 11 and a second input end 12, wherein the first input end 11 is connected with the wind wheel 101, and wind energy in the natural environment is converted into mechanical energy through the wind wheel 101 to obtain initial power; the second input end 12 is connected to the adjustable speed motor 3, and since the wind power is unstable, that is, the initial power is unstable, the rotational speed of the output end of the differential planetary adjustable speed gearbox 1 can be adjusted by the adjustable speed motor 3, and is made constant, so that the rotational speed of the rotor of the synchronous generator 2 connected to the output end of the differential planetary adjustable speed gearbox 1 is made constant, and the electrical frequency output by the synchronous generator 2 is made constant, and can be directly or through a second transformer incorporated into the power grid 104. The speed regulating motor 3 and the synchronous generator 2 are both positioned on one side of the differential planetary speed regulating gearbox 1 far away from the wind wheel 101, so that the structure of the whole transmission chain is more compact, the layout is more reasonable, and for being suitable for different diameters of the wind wheel 101, gear boxes driven by gears of different levels can be arranged between the transmission chain and the wind wheel 101, the adaptability of the transmission chain is improved, and the application range of the transmission chain is expanded.
In this embodiment, the differential planetary speed-regulating gearbox 1 includes a gear ring 13 and a speed-regulating sun gear 14, an output shaft of the gear ring 13 is connected with the synchronous generator 2, an input shaft of the speed-regulating sun gear 14 is the second input end 12, and an input shaft of the speed-regulating sun gear 14 is connected with an output end of the speed-regulating motor 3. The output shaft of the gear ring 13 is the output end of the differential planetary speed regulation gear box 1, the input shaft of the speed regulation sun gear 14 is the second input end 12 of the differential planetary speed regulation gear box 1, the speed regulation motor 3 is used for driving the speed regulation sun gear 14 to rotate, and then the rotation of the gear ring 13 is regulated by regulating the rotation of the planet gear, so that the rotating speed of the gear ring 13 reaches a constant preset value, the electrical frequency output by the synchronous generator 2 is constant, and the electrical frequency can be directly or through a second transformer incorporated into the power grid 104.
In this embodiment, the speed regulation sun gear 14 is disposed at the inner ring of the gear ring 13, the output shaft of the gear ring 13 is a hollow shaft, the input shaft of the speed regulation sun gear 14 passes through the output shaft of the gear ring 13 and is connected with the output end of the speed regulation motor 3, that is, the output shaft of the gear ring 13 is sleeved outside the input shaft of the speed regulation sun gear 14, so that the structure of the differential planetary speed regulation gear box 1 is more compact, the occupied space is reduced, and the synchronous generator 2 connected to the output shaft of the gear ring 13 and the speed regulation motor 3 connected to the input shaft of the speed regulation sun gear 14 are conveniently disposed at the same side of the differential planetary speed regulation gear box 1.
In this embodiment, the differential planetary speed-regulating gearbox 1 further includes a planet carrier 15 and a planet wheel 16, an input shaft of the planet carrier 15 is the first input end 11, the planet carrier 15 drives the planet wheel 16 to revolve, and the planet wheel 16 is located between the speed-regulating sun wheel 14 and the ring gear 13 and is in meshed connection with the speed-regulating sun wheel 14 and the ring gear 13. The input shaft of the planet carrier 15 is a first input end 11, and is conveniently connected with the wind wheel 101 directly or indirectly; the planet carrier 15 is used for driving the planet wheel 16 to revolve, the speed regulation sun wheel 14 is meshed with the planet wheel 16, the planet wheel 16 is driven by initial power from the wind wheel 101 and is also regulated by regulation power from the speed regulation motor 3, the rotating speed of the gear ring 13 meshed with the planet wheel 16 reaches a constant preset value, even if the rotating speed of the rotor of the synchronous generator 2 connected with the gear ring 13 reaches the constant preset value, the output electrical frequency is constant, and the output electrical frequency can be directly or through a second transformer merged into the power grid 104.
In this embodiment, the synchronous generator 2 is disposed between the differential planetary speed-regulating gearbox 1 and the speed-regulating motor 3. The input end of the synchronous generator 2 is connected with the hollow output shaft of the gear ring 13, the input shaft of the speed regulation sun gear 14 passes through the hollow output shaft of the gear ring 13 and the synchronous generator 2 and then is connected with the input end of the speed regulation motor 3, namely, the differential planet speed regulation gear box 1, the synchronous generator 2 and the speed regulation motor 3 are sequentially arranged along the same axis and the same direction, so that the structure is more compact, the layout is more reasonable, and the installation of a transmission chain on a wind power generation device is facilitated.
In this embodiment, synchronous generator 2 has dodge recess 21 towards buncher 3 one side, and buncher 3 part is located dodges recess 21 for the distance between buncher 3 and synchronous generator 2 is littleer, and the position of the two is compacter, further reduces the occupation of driving chain to the space. In other embodiments, the size of the avoidance groove 21 may be set according to actual conditions, and the adjustable speed motor 3 may be entirely located in the avoidance groove 21.
In this embodiment, the first input end 11 is indirectly connected to the wind wheel 101. In particular, the drive train further comprises a basic planetary gearbox arranged between the wind wheel 101 and the differential planetary speed gearbox 1, the input of which is connected to the wind wheel 101 and the output of which is connected to the first input 11. In other alternative embodiments, the first input 11 may also be connected directly to the wind rotor 101, i.e. without a basic planetary gearbox between the wind rotor 101 and the differential planetary gearbox 1.
The basic planetary gearbox can increase the rotation speed of the wind wheel 101 and output the increased rotation speed to the differential planetary speed regulating gearbox 1, for example, in the case that the rotation speed of the wind wheel 101 is low, the basic planetary gearbox can input the lower rotation speed of the wind wheel 101 and then output the higher rotation speed to the differential planetary speed regulating gearbox 1, so that the input rotation speed of the first input end 11 of the differential planetary speed regulating gearbox 1 is closer to the required rotation speed, and the input of the second input end 12 is reduced, that is, the rotation speed of the speed regulating motor 3 is reduced.
In this embodiment, the basic planetary gearbox is the three-stage planetary gearbox 4, the three-stage planetary gearbox 4 has a simple structure, and is a common planetary gearbox, and the three-stage planetary gearbox 4 is adopted, so that the application range of the transmission chain is enlarged, and the cost is low.
Specifically, as shown in fig. 2, the three-stage planetary gear box 4 includes a primary planetary gear assembly 41, a secondary planetary gear assembly 42, and a tertiary planetary gear assembly 43, which are connected in this order. The primary planetary gear assembly 41 comprises a primary planet carrier 411, a primary planet gear 412, a primary gear ring 413 and a primary sun gear 414, an input shaft of the primary planet carrier 411 is connected with the wind wheel 101, the primary planet carrier 411 drives the primary planet gear 412 to rotate, the primary planet gear 412 drives the primary sun gear 414 to rotate, and the primary sun gear 414 is an output end of the primary planetary gear assembly 41; the secondary planetary gear assembly 42 comprises a secondary planet carrier 421, a secondary planet wheel 422, a secondary gear ring 423 and a secondary sun wheel 424, the secondary planet carrier 421 is connected with the primary sun wheel 414 and drives the secondary planet wheel 422 to rotate, the secondary planet wheel 422 drives the secondary sun wheel 424 to rotate, and the secondary sun wheel 424 is the output end of the secondary planetary gear assembly 42; the third planetary gear assembly 43 includes a third planet carrier 431, a third planet wheel 432, a third ring gear 433 and a third sun gear 434, the third planet carrier 431 is connected with the second sun gear 424 and drives the third planet wheel 432 to rotate, the third planet wheel 432 is connected with the third sun gear 434, and the third sun gear 434 is connected with the planet carrier 15 of the differential planetary speed-regulating gearbox 1.
In other embodiments, the basic planetary gearbox may also be a primary planetary gearbox or a secondary planetary gearbox according to the rotating speed of the wind turbine 101, and the present invention is not limited to this embodiment.
As shown in fig. 3, the present embodiment further provides a wind generating set 100, which includes a wind wheel 101, and the wind generating set 100 further includes the transmission chain of the wind generating set 100, where the wind wheel 101 is connected to an input end of the transmission chain, and wind energy in a natural environment is converted into mechanical energy through the wind wheel 101. The speed regulating motor 3 and the synchronous generator 2 in the transmission chain are both positioned on one side of the differential planet speed regulating gearbox 1 far away from the wind wheel 101, so that the whole wind generating set 100 is more compact in structure and more reasonable in layout, and for being suitable for different diameters of the wind wheel 101, gear boxes driven by gears of different levels can be arranged between the transmission chain and the wind wheel 101, so that the wind generating set 100 is more convenient to assemble.
Specifically, in the present embodiment, the synchronous generator 2 of the wind turbine generator system 100 is a high voltage generator and is directly connected to the grid 104. The differential planetary speed regulating gearbox 1 of the wind generating set 100 is provided with two input ends, namely a first input end 11 and a second input end 12, wherein the first input end 11 is connected with a wind wheel 101, and wind energy in the natural environment is converted into mechanical energy through the wind wheel 101 to obtain initial power; the second input end 12 is connected with the adjustable speed motor 3 to obtain the adjusting power, and because the wind power is unstable, namely the initial power is unstable, the adjusting power provided by the adjustable speed motor 3 can adjust the rotating speed of the output end of the differential planetary adjustable speed gearbox 1, so that the rotating speed is constant, further the electrical frequency output by the synchronous generator 2 is constant, and the electrical frequency can be directly merged into the power grid 104. In other embodiments, the synchronous generator 2 may also be a medium voltage generator or a low voltage generator and be connected to the grid 104 via a second transformer.
In this embodiment, the wind generating set 100 further includes a frequency converter 102 and a first transformer 103, the adjustable-speed motor 3, the frequency converter 102 and the first transformer 103 are sequentially connected, and the first transformer 103 is used for connecting to a power grid 104. The speed regulating motor 3 is connected with a power grid 104 through a frequency converter 102 and a first transformer 103, when the rotating speed of the wind wheel 101 is small and the rotating speed of the output end of the transmission chain is lower than the rotating speed required by the synchronous generator 2, the power grid 104 is equivalent to the power supply of the speed regulating motor 3, and the speed regulating motor 3 can provide power for the transmission chain, so that the rotating speed of the output end of the transmission chain reaches the rotating speed required by the synchronous generator 2; when the rotating speed of the wind wheel 101 is moderate and the rotating speed of the output end of the transmission chain just reaches the rotating speed required by the synchronous generator 2, the speed regulating motor 3 does not work and the provided power is zero; when the rotation speed of the output end of the transmission chain is higher than the rotation speed required by the synchronous generator 2, the adjustable speed motor 3 is equivalent to a generator at this time, and can consume part of the initial power provided by the first input end 11, reduce the rotation speed of the output end of the transmission chain to the rotation speed required by the synchronous generator 2, and the electric energy generated by the adjustable speed motor 3 is finally merged into the power grid 104 through the frequency converter 102 and the first transformer 103.
In this embodiment, the wind turbine generator system 100 further includes a brake for stopping rotation of the rotor of the synchronous generator 2. The rotation of the rotor of the synchronous generator 2 can be stopped by actuating the brake so as to perform installation or maintenance of the wind turbine generator set 100, which is convenient and fast.
As shown in fig. 4, the present embodiment further provides a single-blade barring method, which is applicable to the wind turbine generator system 100 described above, and includes the following steps:
s1, before a hub of a wind wheel 101 is rotated, a brake is started, and a synchronous generator 2 is prevented from moving;
and S2, starting the speed regulating motor 3, and driving the hub to rotate at different angles through the transmission chain so as to respectively complete the installation of each blade of the wind wheel 101.
Installing the blades of the wind wheel 101 by adopting a single-blade barring method, namely installing the blades of the wind wheel 101 one by one, stopping the rotation of the rotor of the synchronous generator 2 by starting a brake, and stopping the synchronous generator 2 from working at the moment and not generating electricity any more; and then the speed regulating motor 3 is started, the power grid 104 is a power supply of the speed regulating motor 3, the speed regulating motor 3 drives the first input end 11 of the differential planetary speed regulating gearbox 1 to rotate, and then the hub of the wind wheel 101 is driven to rotate by different angles, so that the installation of each blade of the wind wheel 101 is respectively completed.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes or modifications to these embodiments may be made by those skilled in the art without departing from the principle and spirit of this invention, and these changes and modifications are within the scope of this invention.

Claims (12)

1. The utility model provides a wind generating set's driving chain, includes differential planet speed adjusting gear box, synchronous generator and buncher, its characterized in that, differential planet speed adjusting gear box has first input and second input, first input be used for with wind generating set's wind wheel is connected, the second input be used for with buncher's output is connected, differential planet speed adjusting gear box's output with synchronous generator's input is connected, buncher with synchronous generator all is located one side that differential planet speed adjusting gear box kept away from the wind wheel.
2. The drive chain of a wind turbine generator set according to claim 1, wherein the differential planetary speed-regulating gearbox comprises a gear ring and a speed-regulating sun gear, an output shaft of the gear ring is connected with the synchronous generator, an input shaft of the speed-regulating sun gear is the second input end, and an input shaft of the speed-regulating sun gear is connected with an output end of the speed-regulating motor.
3. The transmission chain of the wind generating set according to claim 2, wherein the speed-regulating sun gear is arranged at the inner ring of the gear ring, the output shaft of the gear ring is a hollow shaft, and the input shaft of the speed-regulating sun gear passes through the output shaft of the gear ring to be connected with the output end of the speed-regulating motor.
4. The drive chain of a wind turbine generator set according to claim 3, wherein the differential planetary speed gearbox further comprises a planet carrier and planet wheels, the input shaft of the planet carrier is the first input end, the planet carrier drives the planet wheels to revolve, and the planet wheels are positioned between the speed sun wheel and the ring gear and are in meshed connection with the speed sun wheel and the ring gear.
5. The drive train of a wind energy plant according to claim 1, wherein the synchronous generator is arranged between the differential planetary speed gearbox and the speed motor.
6. The drive chain of a wind turbine according to claim 5, wherein the synchronous generator has an escape recess on a side facing the speed regulating motor, and the speed regulating motor is at least partially located in the escape recess.
7. The drive train of a wind turbine according to claim 1, wherein the drive train further comprises a basic planetary gearbox connected between the wind rotor and the differential planetary speed gearbox.
8. The drive train of a wind park according to claim 7, wherein the basic planetary gearbox is one of a primary planetary gearbox, a secondary planetary gearbox or a tertiary planetary gearbox.
9. A wind park comprising a rotor, characterized in that it further comprises a drive chain of a wind park according to any of claims 1-8, the rotor being connected to an input of the drive chain.
10. The wind power plant of claim 9, further comprising a frequency converter and a first transformer, wherein the variable speed motor, the frequency converter and the first transformer are connected in sequence, and the first transformer is used for connecting to a power grid.
11. A wind park according to claim 10, wherein the wind park further comprises a brake for stopping rotation of the rotor of the synchronous generator.
12. A single-blade barring method, wherein the single-blade barring method is applied to the wind turbine generator system according to claim 11, and comprises the following steps:
s1, before a hub of the wind wheel is rotated, the brake is started, and the synchronous generator is prevented from moving;
and S2, starting the speed regulating motor, and driving the hub to rotate at different angles through the transmission chain so as to respectively complete the installation of each blade of the wind wheel.
CN202210981213.1A 2022-08-16 2022-08-16 Transmission chain of wind generating set, wind generating set and single-blade barring method Pending CN115355295A (en)

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