CN117536795A - Double-rotor horizontal-axis wind driven generator synthetic transmission chain based on differential mechanism - Google Patents
Double-rotor horizontal-axis wind driven generator synthetic transmission chain based on differential mechanism Download PDFInfo
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- CN117536795A CN117536795A CN202311537550.2A CN202311537550A CN117536795A CN 117536795 A CN117536795 A CN 117536795A CN 202311537550 A CN202311537550 A CN 202311537550A CN 117536795 A CN117536795 A CN 117536795A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 108
- 230000007246 mechanism Effects 0.000 title claims abstract description 29
- 230000033001 locomotion Effects 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims abstract description 4
- 230000009471 action Effects 0.000 claims abstract description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 20
- 238000003786 synthesis reaction Methods 0.000 claims description 20
- 239000002131 composite material Substances 0.000 claims description 14
- 230000003068 static effect Effects 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 8
- 238000010248 power generation Methods 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 7
- 230000001133 acceleration Effects 0.000 abstract 3
- 230000007547 defect Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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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
- F03D15/00—Transmission of mechanical power
- F03D15/10—Transmission of mechanical power using gearing not limited to rotary motion, e.g. with oscillating or reciprocating members
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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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/02—Wind motors with rotation axis substantially parallel to the air flow entering the rotor having a plurality of rotors
- F03D1/025—Wind motors with rotation axis substantially parallel to the air flow entering the rotor having a plurality of rotors coaxially arranged
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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
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/40—Transmission of power
- F05B2260/403—Transmission of power through the shape of the drive components
- F05B2260/4031—Transmission of power through the shape of the drive components as in toothed gearing
- F05B2260/40311—Transmission of power through the shape of the drive components as in toothed gearing of the epicyclic, planetary or differential type
Abstract
The invention provides a double-rotor horizontal-axis wind driven generator synthetic transmission chain based on a differential mechanism, which comprises a main rotor and an auxiliary rotor of a wind driven generator; the diameter of the main rotor is the same as that of the auxiliary rotor, and the wing profiles are the same; the input rotor positioned in front of the incoming flow direction is a main rotor, and the input rotor positioned in rear of the incoming flow direction is an auxiliary rotor; the main rotor and the auxiliary rotor are respectively accelerated by a main acceleration gear box (13) and an auxiliary acceleration gear box (16) which are connected with the main rotor and the auxiliary rotor under the driving of wind power to form two paths of reduced torque, and then the two paths of reduced torque are combined by a central differential to form the output torque for driving the generator through a central differential combined acceleration gear box (14); the rotation actions and the steering directions of the main rotor and the auxiliary rotor are opposite when the main rotor and the auxiliary rotor are subjected to wind so as to reduce the overturning moment of the wind driven generator tower in the wind receiving process; the invention can fully utilize the advantages of the double-rotor horizontal-shaft wind driven generator and the differential mechanism, and can effectively synthesize the two rotor movements of the double-rotor horizontal-shaft wind driven generator.
Description
Technical Field
The invention relates to the technical field of manufacturing of transmission chains of horizontal-axis wind turbines, in particular to a double-rotor horizontal-axis wind turbine synthetic transmission chain based on a differential mechanism.
Background
There is a betz limit on the wind energy utilization rate of the single-rotor horizontal-axis wind driven generator, the theoretical upper limit is 0.593, and the actual wind energy utilization rate is only about 0.42. In order to improve the single-machine power of the single-rotor horizontal-shaft wind driven generator, the diameter of the blade can only be continuously increased, but the diameter of the blade is limited by material strength, material cost and the like and cannot be infinitely increased, so that the double-rotor horizontal-shaft wind driven generator is proposed. The two rotors of the double-rotor horizontal-axis wind driven generator participate in power generation, wherein the main rotor is positioned in front of the incoming wind direction, the auxiliary rotor is positioned behind the incoming wind direction, the diameter of the main rotor is the same as that of the auxiliary rotor, the wing profiles are the same, and the directions of the wing profiles are opposite. Wind flows through the main rotor and is extracted, but a large part of wind energy is still not utilized, so that an auxiliary rotor which is opposite to the main rotor in direction is adopted to continuously utilize wind energy to generate electricity, and the wind energy utilization rate of the double-rotor horizontal-shaft fan in the rotor arrangement mode can reach 0.53 through simulation. In addition, by the arrangement of the double rotors with opposite directions, faster wake flow recovery can be brought, so that wind can quickly supplement energy from the atmosphere after flowing through the wind driven generator, and the wind energy can be conveniently obtained by a subsequent fan in a wind field.
The transmission chain of the dual-rotor horizontal-axis wind driven generator is usually an independent transmission chain, namely, two sets of transmission chains and two generators are adopted, and the defects of high cost, overlarge weight, overlong axial distance, difficult circuit arrangement and the like exist.
The synthetic transmission chain of the double-rotor horizontal-axis wind driven generator has two routes of electric synthesis and mechanical synthesis. The electric synthesis route generally adopts a double-winding generator, so that the heat generation capacity of the generator can be greatly increased, the complexity of the wind turbine generator set is greatly increased by the aid of additional cooling equipment and electric decoupling equipment, and the cost and the fault rate are increased.
Based on the advantages of the double-rotor horizontal-axis wind driven generator and the differential mechanism are fully utilized, and the double-rotor horizontal-axis wind driven generator synthetic transmission chain with high transmission efficiency is constructed by means of planetary gear transmission, the clutch and the arc gear bevel gear differential mechanism made of Grisen teeth.
Disclosure of Invention
The invention provides a double-rotor horizontal-axis wind driven generator synthetic transmission chain based on a differential mechanism, which is safe and reliable, mature in technology and high in cost performance, fully utilizes the advantages of the double-rotor horizontal-axis wind driven generator and the differential mechanism, can effectively synthesize the two rotor motions of the double-rotor horizontal-axis wind driven generator, can be applied to land or offshore wind farms with shortage of tower resources, and has important significance in improving the wind energy utilization rate of a single horizontal-axis wind driven generator, saving the tower cost and the like.
The invention adopts the following technical scheme.
The double-rotor horizontal-axis wind driven generator synthesis transmission chain based on the differential mechanism comprises a main rotor and an auxiliary rotor of the wind driven generator; the diameter of the main rotor is the same as that of the auxiliary rotor, and the wing profiles are the same; the input rotor positioned in front of the incoming wind direction is a main rotor (11), and the input rotor positioned in rear of the incoming wind direction is an auxiliary rotor (18); the rotation action of the main rotor and the auxiliary rotor driven by wind power is respectively increased by a main speed increasing gear box (13) and an auxiliary speed increasing gear box (16) which are connected with the main rotor and the auxiliary rotor, two paths of reduced torques are formed, and the two paths of torques are input into a central differential mechanism composite speed increasing gear box (14) through a clutch and are combined to form output torque for driving a generator (15);
the main rotor and the auxiliary rotor rotate in opposite directions when receiving wind so as to reduce the overturning moment of the wind driven generator tower in the wind receiving process.
The main rotor adopts a double-blade rotor, and rotates clockwise when receiving wind; the auxiliary rotor adopts a double-blade rotor and rotates anticlockwise when receiving wind.
The primary rotor carries out preliminary speed increasing and torque reducing through a speed increasing gear box comprising a two-stage NGW transmission configuration planetary gear train, the two-stage NGW transmission configuration planetary gear train is provided with two single-stage NGW transmission configuration planetary gear trains, the first stage is a low-speed-stage NGW transmission configuration planetary gear train and is connected with the primary rotor, and the second stage is a high-speed-stage NGW transmission configuration planetary gear train and is connected with the first stage.
The low-speed NGW transmission configuration planetary gear train comprises a low-speed sun gear (3), four low-speed planetary gears (2), a low-speed planetary carrier and a low-speed gear ring (1), wherein the four low-speed planetary gears are arranged on the low-speed planetary carrier, the low-speed planetary gears are externally meshed with the low-speed sun gear, the low-speed planetary gears are internally meshed with the low-speed gear ring, the low-speed planetary carrier bears the input torque of a main rotor, the low-speed sun gear outputs torque to the high-speed NGW transmission configuration planetary gear train, and the low-speed gear ring is of a static fixed structure;
the high-speed NGW transmission configuration planetary gear train is provided with a high-speed sun gear (6), three high-speed planetary gears (5), a high-speed planetary carrier and a high-speed gear ring (4), wherein the three high-speed planetary gears are arranged on the high-speed planetary carrier, the high-speed planetary gears are externally meshed with the high-speed sun gear, the high-speed planetary gears are internally meshed with the high-speed gear ring, the high-speed planetary carrier bears the input torque of the low-speed NGW transmission configuration planetary gear train, the high-speed sun gear externally outputs the torque, and the high-speed gear ring is of a static fixed structure.
The auxiliary rotor performs preliminary speed and torque increasing through a speed increasing gear box comprising an NW transmission configuration planetary gear train, the NW transmission configuration planetary gear train is a planetary gear train with a duplex planetary gear, the duplex planetary gear comprises an NW small planetary gear (13) and an NW large planetary gear (11) which are fixedly connected together, an NW gear ring (14) is in transmission with the NW small planetary gear, the NW gear ring is connected with the NW auxiliary rotor, the NW large planetary gear is in transmission with an NW sun gear (12), and the NW sun gear is connected with an output shaft.
The NW transmission configuration planetary gear train comprises an NW sun gear, three duplex planetary gears, an NW planet carrier and an NW gear ring, wherein the three duplex planetary gears are arranged on the planet carrier, the NW small planetary gears are internally meshed with the NW gear ring, the NW large planetary gears are externally meshed with the NW sun gear, the NW planet carrier is of a static fixed structure, the NW sun gear externally outputs torque, the NW gear ring bears the input torque of an auxiliary rotor, and the NW transmission configuration planetary gear train has a large transmission ratio.
The torque after the reduction of main speed increasing gearbox (13), supplementary speed increasing gearbox (16) output is exported respectively to the clutch of corresponding connection, the clutch includes interior clutch disc (20), outer clutch disc (10), clutch housing (30) and output shaft, interior, outer clutch disc respectively have four in the clutch, interior clutch disc is including the recess that can gomphosis to the output shaft, outer clutch disc is including the recess that can gomphosis to the clutch housing, the clutch housing is connected with rotor speed increasing gearbox, the output shaft is connected with central differential mechanism synthetic speed increasing gearbox, after interior clutch disc compresses tightly with outer clutch disc, through friction transmission power, after interior clutch disc and outer clutch disc loosen, power disconnection.
The central differential synthetic speed-increasing gearbox is of a differential structure and comprises four spiral bevel gears with the same size and made of Grisen teeth, a bevel gear shell, a large spiral bevel gear with the same size and made of Grisen teeth and a small spiral bevel gear with the same size and made of Grisen teeth;
the spiral bevel gears of four Glison's system are two semi-axis input bevel gears (7) and two differential planetary bevel gears (8) respectively, semi-axis input bevel gears are connected with the output shaft of clutch, differential planetary bevel gears are connected with semi-axis input bevel gears in order to carry out differential motion synthesis, two differential planetary bevel gears are fixed on the bevel gear casing, output to the bevel gear casing after accomplishing motion synthesis, the bevel gear casing is fixed on big spiral bevel gear (9), big spiral bevel gear is connected with little spiral bevel gear (50) to accomplish the motion synthesis output of main rotor, auxiliary rotor.
The generator is vertically arranged to lower the center of gravity of the engine room, is driven by a vertical shaft formed by a large spiral bevel gear and a small spiral bevel gear of a central differential synthetic speed-increasing gear box, and drives a generator main shaft vertical to the ground by the power of the torque of a main rotor and an auxiliary rotor.
The generator is a permanent magnet synchronous generator, an input shaft of the generator is connected with a central differential synthetic speed-increasing gear box, and torque formed after the central differential synthetic gear box synthesizes a main rotor and an auxiliary rotor to perform rotary motion is used as power generation power.
The invention discloses a double-rotor horizontal-axis wind turbine synthetic transmission chain based on a differential mechanism, and relates to the field of megawatt horizontal-axis wind turbine transmission chains. The transmission chain mainly comprises two rotors, two speed-increasing gearboxes matched with the rotors, two clutches, a central differential mechanism synthetic speed-increasing gearbox and a permanent magnet synchronous generator. The main characteristic is that the transmission chain has two input rotors, namely a main rotor positioned in front of the incoming wind direction and an auxiliary rotor positioned behind the incoming wind direction, the main rotor and the auxiliary rotor are accelerated by respective matched speed increasing gearboxes and then input into the central differential mechanism to synthesize the speed increasing gearboxes through the clutches, so that the movements of the two rotors are synthesized on the mechanical level and finally output into a permanent magnet synchronous generator. The invention has the technical effects that under the same power condition, the invention has smaller rotor diameter and transmission chain size, improves the wind energy utilization rate, saves wind field resources, reduces the equipment cost of the wind turbine, improves the output benefit of the wind turbine, and reduces the overturning moment of wind to a tower by the double rotors with opposite steering.
According to the differential-based double-rotor horizontal-shaft wind driven generator synthetic transmission chain, stall caused by too fast rotation speed of a single rotor can be relieved through the clutch, and the differential is idle; for example, when the rotational speed of one of the rotors is too high, by controlling the clutch of that rotor to be disengaged, the power input to that rotor is cut off, and the central differential is prevented from idling.
The technical scheme provided by the invention has the following beneficial effects:
1. the motion of two rotors of the double-rotor horizontal-axis wind driven generator is synthesized on a mechanical level, the problems that a traditional synthetic transmission chain is large in heating value and unreliable in system in electric synthesis are solved, a main rotor and an auxiliary rotor jointly drive a permanent magnet synchronous generator through the synthetic transmission chain, and as a result, compared with a single-rotor horizontal-axis wind driven generator with the same power, the diameter size of the rotor is reduced by about 25%, the wind energy utilization rate is improved by 11%, the weight and the volume of a speed-increasing gear box of the double-rotor horizontal-axis wind driven generator are reduced, and the output of the double-rotor horizontal-axis wind driven generator is improved.
2. According to the invention, the idle running phenomenon of the differential is avoided through the design of the clutch, and the safety of the transmission chain is improved.
3. Compared with the defect that a single-rotor horizontal-axis wind driven generator in the prior art receives single-side overturning moment, the main rotor and the auxiliary rotor are positioned on two sides of the tower, and the two rotors are stressed, so that unbalanced moment received by the tower is reduced.
Drawings
The invention is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a schematic illustration of the present invention;
FIG. 2 is a schematic cross-sectional view of a clutch;
FIG. 3 is a schematic view of an inner clutch plate of the clutch with an inner race having a projection for engaging an output shaft;
FIG. 4 is a schematic view of the outer clutch plate of the clutch with the outer race having a projection for engagement with the input housing;
FIG. 5 is a simplified schematic diagram of the drive train of the present invention;
in the figure: 1-a low gear ring; 2-low-speed planetary gears; 3-low speed stage sun gear; 4-high-speed gear ring; 5-high-speed planetary gears; 6-a high-speed sun gear; 7-a half shaft input bevel gear; 8-differential planetary bevel gears; 9-large spiral bevel gears; 10-outer clutch plates;
11-a main rotor; 12-a clutch connected to the main rotor; 13-a main speed increasing gearbox; 14-a central differential synthesis speed-increasing gearbox; 15-an electric generator; 16-auxiliary speed increasing gear box; 17-a clutch connected to the auxiliary rotor; 18-an auxiliary rotor;
20-inner clutch plates; 30-a clutch housing;
50-small spiral bevel gear.
Detailed Description
As shown in the figure, a double-rotor horizontal-axis wind driven generator synthesis transmission chain based on a differential mechanism comprises a main rotor and an auxiliary rotor of the wind driven generator; the diameter of the main rotor is the same as that of the auxiliary rotor, and the wing profiles are the same; the input rotor positioned in front of the incoming wind direction is a main rotor 11, and the input rotor positioned in rear of the incoming wind direction is an auxiliary rotor 18; the rotation of the main rotor and the auxiliary rotor driven by wind power is respectively increased by a main speed increasing gear box 13 and an auxiliary speed increasing gear box 16 which are connected with the main rotor and the auxiliary rotor, and two paths of reduced torques are formed, and the two paths of torques are input into a central differential mechanism synthesis speed increasing gear box 14 through a clutch and are combined to form an output torque for driving a generator 15;
the main rotor and the auxiliary rotor rotate in opposite directions when receiving wind so as to reduce the overturning moment of the wind driven generator tower in the wind receiving process.
The main rotor adopts a double-blade rotor, and rotates clockwise when receiving wind; the auxiliary rotor adopts a double-blade rotor and rotates anticlockwise when receiving wind.
The primary rotor carries out preliminary speed increasing and torque reducing through a speed increasing gear box comprising a two-stage NGW transmission configuration planetary gear train, the two-stage NGW transmission configuration planetary gear train is provided with two single-stage NGW transmission configuration planetary gear trains, the first stage is a low-speed-stage NGW transmission configuration planetary gear train and is connected with the primary rotor, and the second stage is a high-speed-stage NGW transmission configuration planetary gear train and is connected with the first stage.
The low-speed NGW transmission configuration planetary gear train comprises a low-speed sun gear 3, four low-speed planetary gears 2, a low-speed planetary carrier and a low-speed gear ring 1, wherein the four low-speed planetary gears are arranged on the low-speed planetary carrier, the low-speed planetary gears are externally meshed with the low-speed sun gear, the low-speed planetary gears are internally meshed with the low-speed gear ring, the low-speed planetary carrier bears the input torque of a main rotor, the low-speed sun gear outputs torque to the high-speed NGW transmission configuration planetary gear train, and the low-speed gear ring is of a static fixed structure;
the high-speed NGW transmission configuration planetary gear train is provided with a high-speed sun gear 6, three high-speed planetary gears 5, a high-speed planetary carrier and a high-speed gear ring 4, wherein the three high-speed planetary gears are arranged on the high-speed planetary carrier, the high-speed planetary gears are externally meshed with the high-speed sun gear, the high-speed planetary gears are internally meshed with the high-speed gear ring, the high-speed planetary carrier bears the input torque of the low-speed NGW transmission configuration planetary gear train, the high-speed sun gear externally outputs the torque, and the high-speed gear ring is of a static fixed structure.
The auxiliary rotor performs preliminary speed and torque increasing through a speed increasing gear box comprising an NW transmission configuration planetary gear train, the NW transmission configuration planetary gear train is a planetary gear train with a duplex planetary gear, the duplex planetary gear comprises an NW small planetary gear 13 and an NW large planetary gear 11 which are fixedly connected together, the NW gear ring 14 is in transmission with the NW small planetary gear, the NW gear ring is connected with the NW auxiliary rotor, the NW large planetary gear is in transmission with an NW sun gear 12, and the NW sun gear is connected with an output shaft.
The NW transmission configuration planetary gear train comprises an NW sun gear, three duplex planetary gears, an NW planet carrier and an NW gear ring, wherein the three duplex planetary gears are arranged on the planet carrier, the NW small planetary gears are internally meshed with the NW gear ring, the NW large planetary gears are externally meshed with the NW sun gear, the NW planet carrier is of a static fixed structure, the NW sun gear externally outputs torque, the NW gear ring bears the input torque of an auxiliary rotor, and the NW transmission configuration planetary gear train has a large transmission ratio.
The reduced torque output by the main speed increasing gearbox 13 and the auxiliary speed increasing gearbox 16 is output to the corresponding connected clutches respectively, the clutches comprise an inner clutch plate 20, an outer clutch plate 10, a clutch housing 30 and an output shaft, four inner clutch plates and four outer clutch plates in the clutches respectively, the inner clutch plate comprises grooves which can be embedded to the output shaft, the outer clutch plate comprises grooves which can be embedded to the clutch housing, the clutch housing is connected with the rotor speed increasing gearbox, the output shaft is connected with the central differential synthetic speed increasing gearbox, after the inner clutch plate is compressed with the outer clutch plate, power is transmitted through friction, and after the inner clutch plate and the outer clutch plate are released, the power is disconnected.
The central differential synthetic speed-increasing gearbox is of a differential structure and comprises four spiral bevel gears with the same size and made of Grisen teeth, a bevel gear shell, a large spiral bevel gear with the same size and made of Grisen teeth and a small spiral bevel gear with the same size and made of Grisen teeth;
the four spiral bevel gears of the Glisen tooth system are respectively two half-shaft input bevel gears 7 and two differential planet bevel gears 8, the half-shaft input bevel gears are connected with the output shafts of the clutches, the differential planet bevel gears are connected with the half-shaft input bevel gears to conduct differential motion synthesis, the two differential planet bevel gears are fixed on a bevel gear shell, the output of the bevel gear shell is achieved after the motion synthesis, the bevel gear shell is fixed on a large spiral bevel gear 9, and the large spiral bevel gear is connected with a small spiral bevel gear 50 to achieve motion synthesis output of a main rotor and an auxiliary rotor.
The generator is vertically arranged to lower the center of gravity of the engine room, is driven by a vertical shaft formed by a large spiral bevel gear and a small spiral bevel gear of a central differential synthetic speed-increasing gear box, and drives a generator main shaft vertical to the ground by the power of the torque of a main rotor and an auxiliary rotor.
The generator is a permanent magnet synchronous generator, an input shaft of the generator is connected with a central differential synthetic speed-increasing gear box, and torque formed after the central differential synthetic gear box synthesizes a main rotor and an auxiliary rotor to perform rotary motion is used as power generation power.
Examples:
in the example, a double-rotor horizontal-axis wind turbine synthetic transmission chain based on a differential mechanism relates to the field of megawatt horizontal-axis wind turbine transmission chains. The transmission chain mainly comprises two rotors, two speed-increasing gearboxes matched with the rotors, two clutches, a central differential mechanism synthetic speed-increasing gearbox and a permanent magnet synchronous generator. The main characteristic is that the transmission chain has two input rotors, namely a main rotor positioned in front of the incoming wind direction and an auxiliary rotor positioned behind the incoming wind direction, the main rotor and the auxiliary rotor are accelerated by respective matched speed increasing gearboxes and then input into the central differential mechanism to synthesize the speed increasing gearboxes through the clutches, so that the movements of the two rotors are synthesized on the mechanical level and finally output into a permanent magnet synchronous generator.
The double-rotor horizontal-shaft wind driven generator based on the differential mechanism synthesizes a transmission chain, the input power of a main rotor is 1600KW, the input rotating speed is 9.9rpm, the speed and the torque are increased and reduced through a two-stage NGW transmission configuration planetary gear train, the input power of an auxiliary rotor is 1000KW, the input rotating speed is 16rpm, and the speed and the torque are increased and reduced through a single-stage NW transmission configuration planetary gear train.
The main rotor and the auxiliary rotor are respectively matched with a speed increasing gear box which is connected with a central differential mechanism through a clutch, so that flexible connection and disconnection of movement of the two rotors of the double-rotor horizontal-axis wind driven generator are completed. The wind turbine generator system has the advantages that under the condition of the same power, the wind turbine generator system has smaller rotor diameter and transmission chain size, improves the wind energy utilization rate, saves wind field resources, reduces the equipment cost of the wind turbine generator system, improves the output benefit of the wind turbine generator system, and reduces the overturning moment of wind to a tower frame due to double rotors with opposite directions.
In this example, the input rotors at the two input ends have the same diameter and are opposite in direction. The rear parts of the main rotor and the auxiliary rotor are respectively provided with a corresponding gear speed increaser for first-stage speed increase, and then are jointly connected into a central differential mechanism synthesis speed increase gear box for motion synthesis and second-stage speed increase.
In this example, the main rotor carries out first-stage speed increasing through a two-stage NGW transmission configuration planetary gear train, the two-stage NGW transmission configuration planetary gear train has two single-stage NGW transmission configuration planetary gear trains, the total transmission ratio is 25, the first stage is a low-speed-stage NGW transmission configuration planetary gear train, the transmission ratio is 5, the first stage is connected with the main rotor, the second stage is a high-speed-stage NGW transmission configuration planetary gear train, and the transmission ratio is 5, and the second stage is connected with the first stage.
In this example, the auxiliary rotor is accelerated by a single-stage NW transmission planetary gear train, the total transmission ratio is 15.467, the single-stage NW transmission planetary gear train has a single-stage NW transmission planetary gear train with double planetary gears, the first stage is a low-speed stage, the transmission ratio is 3.476, the ring gear-small planetary gear is in transmission, the ring gear is connected with the auxiliary rotor, the second stage is a high-speed stage, the transmission ratio is 4.450, the large planetary gear-sun gear is in transmission, and the sun gear is connected with the output shaft.
In this example, the steering of the auxiliary rotor is changed into the same steering as the rotor after the speed is increased by the single-stage NW transmission planetary gear train, so that the central differential is convenient to synthesize.
In this example, the number of teeth and modulus of each gear are shown in the following table
The two-stage NGW transmission configuration planetary gear trains in the main rotor speed-increasing gear box all adopt helical gears, the helical angle is 8 degrees, all undergo angle deflection, and the deflection coefficients are shown in the following table:
the planetary gear trains with single-stage NW transmission configuration in the auxiliary rotor speed-increasing gearbox all adopt helical gears, the helical angle is 8 degrees, all undergo angle deflection, and the deflection coefficients are shown in the following table:
in the embodiment, spiral bevel gears in the central differential synthetic speed-increasing gear box are all made of Grisen teeth so as to improve bearing capacity, and after the main rotor and the auxiliary rotor are increased in speed through the respective speed-increasing gear boxes, the rated rotation speed is consistent, the steering is consistent, and the central differential performs motion synthesis.
The double-rotor horizontal-shaft fan composite transmission chain based on the differential mechanism is provided, the advantages of the double-rotor horizontal-shaft fan and the differential mechanism are combined, the double-rotor horizontal-shaft fan composite transmission chain with high transmission efficiency is constructed by means of planetary gear transmission, the clutch and the arc tooth bevel gear differential mechanism of the Grisen teeth, good effects are achieved, the double-rotor horizontal-shaft fan composite transmission chain can be applied to the double-rotor horizontal-shaft fan, and the double-rotor horizontal-shaft fan composite transmission chain has important significance in improving wind energy utilization rate, saving tower resources and the like, and has innovation and practicability.
It is to be understood that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications within the spirit and scope of the present invention as defined by the appended claims.
Claims (10)
1. A synthetic drive chain of birotor horizontal axis aerogenerator based on differential mechanism, its characterized in that: the transmission chain comprises a main rotor and an auxiliary rotor of the wind driven generator; the diameter of the main rotor is the same as that of the auxiliary rotor, and the wing profiles are the same; the input rotor positioned in front of the incoming wind direction is a main rotor (11), and the input rotor positioned in rear of the incoming wind direction is an auxiliary rotor (18); the rotation action of the main rotor and the auxiliary rotor driven by wind power is respectively increased by a main speed increasing gear box (13) and an auxiliary speed increasing gear box (16) which are connected with the main rotor and the auxiliary rotor, two paths of reduced torques are formed, and the two paths of torques are input into a central differential mechanism composite speed increasing gear box (14) through a clutch and are combined to form output torque for driving a generator (15);
the main rotor and the auxiliary rotor rotate in opposite directions when receiving wind so as to reduce the overturning moment of the wind driven generator tower in the wind receiving process.
2. The differential-based dual-rotor horizontal-axis wind turbine composite drive train of claim 1, wherein: the main rotor adopts a double-blade rotor, and rotates clockwise when receiving wind; the auxiliary rotor adopts a double-blade rotor and rotates anticlockwise when receiving wind.
3. The differential-based dual-rotor horizontal-axis wind turbine composite drive train of claim 1, wherein: the primary rotor carries out preliminary speed increasing and torque reducing through a speed increasing gear box comprising a two-stage NGW transmission configuration planetary gear train, the two-stage NGW transmission configuration planetary gear train is provided with two single-stage NGW transmission configuration planetary gear trains, the first stage is a low-speed-stage NGW transmission configuration planetary gear train and is connected with the primary rotor, and the second stage is a high-speed-stage NGW transmission configuration planetary gear train and is connected with the first stage.
4. A differential-based dual rotor horizontal axis wind turbine synthetic drive train as defined in claim 3 wherein: the low-speed NGW transmission configuration planetary gear train comprises a low-speed sun gear (3), four low-speed planetary gears (2), a low-speed planetary carrier and a low-speed gear ring (1), wherein the four low-speed planetary gears are arranged on the low-speed planetary carrier, the low-speed planetary gears are externally meshed with the low-speed sun gear, the low-speed planetary gears are internally meshed with the low-speed gear ring, the low-speed planetary carrier bears the input torque of a main rotor, the low-speed sun gear outputs torque to the high-speed NGW transmission configuration planetary gear train, and the low-speed gear ring is of a static fixed structure;
the high-speed NGW transmission configuration planetary gear train is provided with a high-speed sun gear (6), three high-speed planetary gears (5), a high-speed planetary carrier and a high-speed gear ring (4), wherein the three high-speed planetary gears are arranged on the high-speed planetary carrier, the high-speed planetary gears are externally meshed with the high-speed sun gear, the high-speed planetary gears are internally meshed with the high-speed gear ring, the high-speed planetary carrier bears the input torque of the low-speed NGW transmission configuration planetary gear train, the high-speed sun gear externally outputs the torque, and the high-speed gear ring is of a static fixed structure.
5. The differential-based dual-rotor horizontal-axis wind turbine composite drive train of claim 1, wherein: the auxiliary rotor performs preliminary speed and torque increasing through a speed increasing gear box comprising an NW transmission configuration planetary gear train, the NW transmission configuration planetary gear train is a planetary gear train with a duplex planetary gear, the duplex planetary gear comprises an NW small planetary gear (13) and an NW large planetary gear (11) which are fixedly connected together, an NW gear ring (14) is in transmission with the NW small planetary gear, the NW gear ring is connected with the NW auxiliary rotor, the NW large planetary gear is in transmission with an NW sun gear (12), and the NW sun gear is connected with an output shaft.
6. The differential-based dual-rotor horizontal-axis wind turbine composite drive train of claim 5, wherein: the NW transmission configuration planetary gear train comprises an NW sun gear, three duplex planetary gears, an NW planet carrier and an NW gear ring, wherein the three duplex planetary gears are arranged on the planet carrier, the NW small planetary gears are internally meshed with the NW gear ring, the NW large planetary gears are externally meshed with the NW sun gear, the NW planet carrier is of a static fixed structure, the NW sun gear externally outputs torque, the NW gear ring bears the input torque of an auxiliary rotor, and the NW transmission configuration planetary gear train has a large transmission ratio.
7. The differential-based dual-rotor horizontal-axis wind turbine composite drive train of claim 1, wherein: the torque after the reduction of main speed increasing gearbox (13), supplementary speed increasing gearbox (16) output is exported respectively to the clutch of corresponding connection, the clutch includes interior clutch disc (20), outer clutch disc (10), clutch housing (30) and output shaft, interior, outer clutch disc respectively have four in the clutch, interior clutch disc is including the recess that can gomphosis to the output shaft, outer clutch disc is including the recess that can gomphosis to the clutch housing, the clutch housing is connected with rotor speed increasing gearbox, the output shaft is connected with central differential mechanism synthetic speed increasing gearbox, after interior clutch disc compresses tightly with outer clutch disc, through friction transmission power, after interior clutch disc and outer clutch disc loosen, power disconnection.
8. The differential-based dual-rotor horizontal-axis wind turbine composite drive train of claim 1, wherein: the central differential synthetic speed-increasing gearbox is of a differential structure and comprises four spiral bevel gears with the same size and made of Grisen teeth, a bevel gear shell, a large spiral bevel gear with the same size and made of Grisen teeth and a small spiral bevel gear with the same size and made of Grisen teeth;
the spiral bevel gears of four Glison's system are two semi-axis input bevel gears and two differential planetary bevel gears respectively, semi-axis input bevel gears are connected with the output shaft of clutch, differential planetary bevel gears are connected with semi-axis input bevel gears in order to carry out differential motion synthesis, two differential planetary bevel gears are fixed on the bevel gear casing, output to the bevel gear casing after accomplishing motion synthesis, the bevel gear casing is fixed on big spiral bevel gear, big spiral bevel gear is connected with little spiral bevel gear to accomplish the motion synthesis output of main rotor, auxiliary rotor.
9. The differential-based dual-rotor horizontal-axis wind turbine composite drive train of claim 8, wherein: the generator is vertically arranged to lower the center of gravity of the engine room, is driven by a vertical shaft formed by a large spiral bevel gear and a small spiral bevel gear of a central differential synthetic speed-increasing gear box, and drives a generator main shaft vertical to the ground by the power of the torque of a main rotor and an auxiliary rotor.
10. The differential-based dual-rotor horizontal-axis wind turbine composite drive train of claim 1, wherein: the generator is a permanent magnet synchronous generator, an input shaft of the generator is connected with a central differential synthetic speed-increasing gear box, and torque formed after the central differential synthetic gear box synthesizes a main rotor and an auxiliary rotor to perform rotary motion is used as power generation power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311537550.2A CN117536795A (en) | 2023-11-17 | 2023-11-17 | Double-rotor horizontal-axis wind driven generator synthetic transmission chain based on differential mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311537550.2A CN117536795A (en) | 2023-11-17 | 2023-11-17 | Double-rotor horizontal-axis wind driven generator synthetic transmission chain based on differential mechanism |
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| Publication Number | Publication Date |
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| CN117536795A true CN117536795A (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311537550.2A Pending CN117536795A (en) | 2023-11-17 | 2023-11-17 | Double-rotor horizontal-axis wind driven generator synthetic transmission chain based on differential mechanism |
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| Country | Link |
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| CN (1) | CN117536795A (en) |
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2023
- 2023-11-17 CN CN202311537550.2A patent/CN117536795A/en active Pending
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