CN203335321U - Magnetic suspension double-wind-wheel wind driven generator - Google Patents

Abstract

The utility model relates to the technical field of new energy sources for wind power generation, in particular disclosing a wind power generator with magnetic levitation double wind wheels. The maglev double wind rotor wind generator includes a nacelle erected on a truss tower, and is characterized in that: the two ends of the nacelle are respectively equipped with a front wind wheel and a rear wind wheel with the same parameters and opposite directions, and the front wind wheel and the rear wind wheel The wheels are respectively connected to the mechanical synthesis mechanism in the nacelle through the front wind wheel shaft and the rear wind wheel shaft. The mechanical synthesis mechanism is connected to the variable speed increaser box at the bottom of the truss tower through the magnetic levitation long axis, and the variable speed increaser box is connected to the generator. Compared with the prior art horizontal axis wind power generator with the same windward area, the utility model has a theoretical value of output power increased by 1.95, and 95% more electricity is generated, which greatly reduces the cost of generating capacity per KW, and at the same time reduces Business expense.

Description

Magnetic Suspension Double Wind Wheel Wind Turbine

(1) Technical field

The present invention relates to the technical field of wind power generation new energy, in particular to a magnetic levitation double wind wheel wind power generator.

(2) Background technology

At present, the wind energy utilization rate C _P of the wind power generator in the prior art is not high, and the Bezier limit is 0.593, which is only a theoretical value. The C _P of the actual wind power generator is only below 0.4, and more than half of the wind energy has not been utilized. It is generally accepted that after the wind rotor blades do work, the wake energy forms a spiral vortex and exhausts the energy by itself. At present, the unit power investment of wind turbines is relatively high but the output is low, so the economy is poor, and they still need to rely on government subsidies for operation. At present, there is a patent ZL201020639154.2 that uses front and rear wind rotors to increase the output of wind power generation, but its synthesis mechanism uses a conical gear differential gear train. The steering of the two input ends of the differential gear train is inconsistent with the output of the actual wind rotor. The synthesis mechanism adjusts the direction before the input, which makes the structure huge and difficult to implement. This patent synthesizes the movement of the front and rear wind rotors and uses column gears as output. The cylindrical solid tower rod also has a great effect on the rear wind wheel tower rod.

The natural incoming wind speed is changing. The wind rotor from the cut-in wind speed to the rated wind speed to the cut-out wind speed is the operation cycle of the wind turbine. During the operation cycle, the incoming wind speed is changing, and the best blade tip can only be reached after the rated speed The speed ratio can achieve the maximum wind energy utilization coefficient. However, after the incoming wind speed reaches the rated wind speed, it will increase. The kinetic energy of the wind is proportional to the cube of the incoming wind speed. When the wind speed doubles, the kinetic energy increases by 8 times. The existing technology The generator and wind rotor of the wind turbine are driven by a fixed speed ratio. The speed of the wind rotor is limited by the rated speed of the generator. It is impossible to obtain the best blade tip speed ratio as the speed of the incoming wind increases. Or variable-pitch control of the wind wheel, when running at the rated speed to the cut-out wind speed, the energy increased by the third power above the rated wind speed is discarded. It can be seen that a large part of the energy of the prior art wind generator is not used in the operation cycle. use.

The existing patent ZL201010124102.6 wind power generation device has no self-locking variable-speed speed-up gearbox, has a speed-changing function, can make full use of the high-speed wind energy, and can make the wind turbine rotor run above the rated wind speed, and can make full use of high wind speed More power generation, but the high-altitude gearbox on the tower pole increases the number of transmission clutches and gears due to the speed change. These wearing parts will increase the maintenance amount of high-altitude components and increase maintenance costs.

(3) Contents of the invention

In order to make up for the deficiencies of the prior art, the present invention provides a magnetic levitation double wind wheel wind generator with low unit power cost and low operating cost.

The present invention is achieved through the following technical solutions:

A magnetic levitation double-wind rotor wind generator, including a nacelle erected on a truss tower, is characterized in that: the two ends of the nacelle are respectively equipped with a front wind wheel and a rear wind wheel with the same parameters and opposite directions, and the front wind wheel and the rear wind wheel The wind rotors are respectively connected to the mechanical synthesis mechanism in the nacelle through the front wind rotor shaft and the rear wind rotor shaft. The mechanical synthesis mechanism is connected to the variable speed increasing box at the bottom of the truss tower through the magnetic levitation long axis, and the variable speed increasing box is connected to the generator.

In the present invention, a rear wind wheel with the same parameters as the front wind wheel and opposite direction is installed behind the nacelle of the horizontal axis wind turbine, and a mechanical synthesis mechanism connecting the two is installed between the front wind wheel and the rear wind wheel. After the wind wheel does work on the kinetic energy of the incoming wind for the first time, the remaining tail kinetic energy is done work by the rear wind wheel for the second time. The power of the front and rear wind wheels is synthesized by the mechanical synthesis mechanism and drives the generator together to form a combined power. . The rear wind wheel absorbs the kinetic energy of the remaining wake after the work done by the front wind wheel and then performs work. It is obviously more than the single wind wheel generator in the prior art. The power generation capacity is one more. With the same parameters of the wind wheel, the same wind energy utilization number C _P =0.4, making the present invention increase the output power by 60% compared with the prior art single-wheel wind power generator with the same windward area.

Because the prior art horizontal axis wind power generator mostly adopts a cylindrical solid tower rod, the tower rod effect produced by this solid tower rod for the rear wind wheel of the present invention is too large, which affects the power generation of the rear wind wheel, thus The invention adopts a well-ventilated truss structure steel tower to reduce the tower pole effect on the rear wind wheel.

And because the present invention has the front and rear wind rotors, which are symmetrical to the center line of the nacelle, the front and rear forces of the nacelle have been balanced, unlike the prior art single wind rotor wind turbine, the weight of the wind wheel is placed at the front end, and the nacelle needs a gearbox and the generator control box are placed at the rear end of the nacelle to balance the gravity of the front wind wheel. In order to reduce the stress on the nacelle and the tower, the present invention uses the long axis of the magnetic suspension bearing to transmit the synthesized power to the ground. The result is The force on the engine room is reduced, and the gearbox, generator and control box are all on the ground, which is convenient for maintenance and greatly reduces maintenance costs, thereby reducing operating costs.

A better solution of the present invention is:

The top of the truss tower is provided with a radial thrust magnetic suspension bearing connected to the long axis of the magnetic suspension, and the inside of the truss tower is provided with a radial magnetic suspension bearing for fixing the long axis of the magnetic suspension. stability.

The mechanical synthesizing mechanism is a differential gear train structure composed of cylindrical gears, the mechanical synthesizing mechanism rotates coaxially with the front wind wheel and the rear wind wheel, and the output element of the mechanical synthesizing mechanism adopts bevel gears, thereby avoiding the use of column wheels, such as Patent 201020639154.2's gear, generator and synthesis mechanism are arranged side by side, which will inevitably increase the windward area of the nacelle, thereby reducing the windward area of the wind wheel. In order to minimize the windward area of the nacelle, the present invention uses bevel gears as motion output components.

The mechanical synthesis mechanism includes a front sun gear connected to the front wind wheel shaft and a rear sun gear connected to the rear wind wheel shaft. The front sun gear and the rear sun gear are surrounded by meshing front planetary gears and rear planetary gears respectively, and the corresponding front planetary gears A transmission shaft is connected with the rear planetary gear, and a large bevel gear of the planet carrier connected to the transmission shaft is arranged above it, and the large bevel gear of the planet carrier is linked with the small bevel gear below, and the long axis of magnetic suspension is installed on the small bevel gear.

The mechanical synthesizing mechanism of the present invention is different from the synthesizing mechanism of the differential gear train composed of bevel gears.

(1) Only when the direction of rotation of the two input ends of the bevel gear synthesizing mechanism is the same can the movement be added, while the steering of the front and rear wind wheels of the double-wind turbine wind turbine is opposite, so the direction of the synthesizing mechanism needs to be adjusted before inputting. The present invention adopts cylindrical gear differential For the gear train, the opposite direction of the two input ends is the sum of motion, which is consistent with the direction of the front and rear wind rotors of the double wind turbine wind turbine, and can be directly connected to the wind rotors without direction adjustment.

(2) The synthesis speed ratio i=1/2 of the bevel gear synthesis mechanism is a speed reduction ratio, which is not in harmony with the speed increase required by the wind turbine. The cylindrical gear differential synthesizing mechanism adopted in the present invention has a synthesizing speed ratio i=7, which is the speed-up ratio, which is consistent with the speed-up required by the wind power generator, and the speed-up ratio is very large.

The present invention adopts the differential gear train as the synthesis mechanism, and the two input terminals of the differential gear train are independent free variables, so the front wind wheel or the rear wind wheel can independently adopt the variable pitch of the blades to control the speed of the wind wheel, so that the system can operate at the most Running in good condition.

Since the power of the front and rear wind wheels is synthesized and transmitted to the ground, the adoption will not be restricted by space conditions and maintenance conditions, and the structural size conditions can be relaxed. The variable speed increaser box is a CVT continuously variable transmission or a non-self-locking variable speed increaser gearbox. , so that the wind turbine can do more work during the cut-in to cut-out time. Compared with the existing technology, the proportional coefficient of the work increase is 1.22. At the same time, the effect of the double wind rotors is included, so that the power generation of the whole machine can be increased by the proportional coefficient is 1.95.

The CVT continuously variable transmission includes a driving wheel installed with a driving wheel oil cylinder, the driving wheel is connected with a driven wheel installed with a driven wheel oil cylinder through a steel belt, and both the driving wheel and the driven wheel are composed of two tapered wheels.

Compared with the prior art horizontal axis wind power generator with the same windward area, the present invention has a theoretical value of output power increased by 1.95, and can generate 95% more electricity, greatly reducing the cost of generating capacity per KW, and reducing operating costs at the same time. Costs, increase wind power equipment output and operating economic benefits, is expected to achieve substantial profits without government subsidies.

(4) Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the internal structure of the mechanical synthesis mechanism of the present invention;

Fig. 3 is the structural representation of CVT continuously variable transmission of the present invention;

Fig. 4 is a schematic diagram of the internal structure of the non-self-locking variable-speed speed-up gearbox of the present invention;

Figure 5 is a schematic diagram of work of the present invention.

In the figure, L ₁ front wind wheel, L ₂ rear wind wheel, H mechanical synthesis mechanism, B variable speed gearbox, C engine room, F generator, 1 front wind wheel shaft, 2 rear wind wheel shaft, 3 planet carrier large bevel gear, 4 front planetary gears, 5 front sun gears, 6 bevel pinion gears, 7 rear planetary gears, 8 rear sun gears, 9 magnetic suspension long shaft, 10 radial thrust magnetic suspension bearings, 11 truss towers, 12, 13 radial magnetic suspension bearings, 16 driving wheels, 17 steel bands, 18 driving wheel oil cylinders, 19 driven wheels, 20 driven wheel oil cylinders.

(5) Specific implementation methods

Accompanying drawing is a kind of specific embodiment of the present invention. This embodiment includes a nacelle C erected on a truss tower 11, and the two ends of the nacelle C are respectively equipped with a front wind wheel L ₁ and a rear wind wheel L ₂ with the same parameters and opposite directions, and the front wind wheel L ₁ and the rear wind wheel L ₂ is respectively connected to the mechanical synthesis mechanism H in the nacelle C through the front wind wheel shaft 1 and the rear wind wheel shaft 2. B is connected to the generator F; the top of the truss tower 11 is provided with a radial thrust magnetic suspension bearing 10 connecting the magnetic suspension long axis 9, and the radial magnetic suspension bearing 12 for fixing the magnetic suspension long axis 9 is arranged inside the truss tower 11; the mechanical synthesis The mechanism H is a differential gear train structure composed of cylindrical gears, and the mechanical synthesis mechanism H rotates coaxially with the front wind wheel L ₁ and the rear wind wheel L ₂ ; the speed increase box B is a CVT continuously variable transmission or automatic Lock variable speed speed-up gearbox; the mechanical synthesis mechanism H includes a front center gear 5 connected to the front wind wheel shaft 1 and a rear center gear 8 connected to the rear wind wheel shaft 2, and the periphery of the front center gear 5 and the rear center gear 8 are respectively meshed with The front planetary gear 4 and the rear planetary gear 7 are connected with transmission shafts between the front and rear corresponding front planetary gears 4 and rear planetary gears 7, and the planet carrier large bevel gear 3 connected to the transmission shaft is arranged above it, and the planet carrier large bevel gear 3 The bevel pinion gear 6 below the linkage, the bevel pinion gear 6 is equipped with a magnetic levitation major shaft 9; the CVT continuously variable transmission includes a drive wheel 16 with a drive wheel oil cylinder 18 installed, and the drive wheel 16 is connected with the driven wheel oil cylinder 20 through a steel belt 17 The driven wheel 19 is connected, and the driving wheel 16 and the driven wheel 19 are all combined by two tapered wheels.

As shown in Figure 1, a rear wind wheel L ₂ with the same parameters as the front wheel L ₁ and the opposite rotation direction is installed behind the front wind wheel L ₁ of the horizontal axis wind turbine. A mechanical synthesis mechanism H connected to the two is installed between L ₂ , after the front wind wheel L ₁ does work on the kinetic energy E ₁ of the incoming wind for the first time, the remaining kinetic energy E ₂ of the wake velocity is generated by the rear wind Wheel L ₂ does work for the second time. The power of the front wind wheel _L1 and the rear wind wheel _L2 is synthesized by the mechanical synthesis mechanism H to form a combined power to drive the generator. The combined power N of the present invention is:

In the formula, N is the synthetic power, N ₁ is the power that the front wind rotor makes to the incoming wind kinetic energy E ₁ , which is also the power of the wind-driven generator in the prior art, and N ₂ is the power that the rear wind wheel makes to the wake kinetic energy E ₂ , which is Characteristic power of the present invention, C _P is the wind energy utilization coefficient that this machine design adopts, then has:

Substituting into formula 1, there are:

This is a concept of increasing the wind energy utilization coefficient, the wind energy utilization coefficient C _Ps of the wind turbine with double wind rotors:

In the formula, N1 is the power made by the front wind wheel, and is also the power of the horizontal axis wind generator in the prior art. N1 can be compared with the combined power N to obtain the power ratio coefficient G of the present invention:

         

If C _P =0.4 is adopted, then G=1.6, the power of the present invention is 160% of the power output of the prior art wind generator, and 60% more electricity is generated.

As shown in Figure 2, the mechanical synthesis mechanism H is a differential gear train, which is a cylindrical gear train, and is composed of a front sun gear 5, a rear sun gear 8, three front planetary gears 4, three rear planetary gears 7 and a Composed of large bevel gears 3, the angular velocity and torque of the front wind wheel _L1 are transmitted to the front sun gear 5 to drive the three front planetary gears 4, while the angular velocity and torque of the rear wind wheel _L2 are transmitted to the rear sun gear 8 to drive the three planetary gears. The rear planetary gear 7, since the front and rear planetary gears 4 and 7 are coaxial, a resultant force is generated to drive the large bevel gear 3 of the planet carrier, and the large bevel gear 3 drives the small bevel gear 6 to drive the generator through the long axis 9 to the variable speed increaser box B F.

According to the principle of planetary gear transmission, the speed ratio relationship formula of the differential gear train is obtained:

In the formula, n ₃ is the speed of the planet carrier, n ₅ is the speed of the front wind wheel L ₁ , n ₈ is the speed of the rear wind wheel L ₂ , and i ₅₈ is the speed ratio from the front sun gear 5 to the rear sun gear 8, that is, from the front Rotational speed ratio of wind wheel L ₁ to rear wind wheel L ₂ :

In the formula, Z ₄ , Z ₅ , Z ₇ and Z 8 are the gear numbers of gears 4, 5, 7 and ₈ respectively, and the gear numbers of each gear are determined by the wind energy utilization coefficient C _P of the wind turbine.

The work N ₁ done by the wind turbine to the kinetic energy of the incoming wind for the first time is the kinetic energy of the incoming wind mV ₁ ² /2 multiplied by the wind energy utilization coefficient C _P of the wind turbine, which is also equal to the wake velocity after the kinetic energy of the incoming wind is subtracted from the work. The kinetic energy of V ₂ is:

                

， Then there are:

,

，

,

。

.

In the formula, V ₁ is the incoming wind speed of the front rotor L ₁ , and V ₂ is the wake velocity of the front rotor L ₁ and the incoming wind speed of the rear rotor L _2. Since the unit adopts the same C _P , formula 4 should be equal to Formula 3:

In this embodiment, C _P =0.4, Z ₅ =35, Z ₄ =45, Z ₇ =Z ₈ =40 Substituting formula 2, then there is: i ₅₈ =1.29, the wind coming from the front wind wheel is input by V ₁ and n ₅ , and the wind coming from the rear wind rotor is input by V ₂ with n ₈ , which is determined by the wind energy utilization coefficient n ₈ =n ₅ /i ₃₈ , and the direction is opposite, then:

In this embodiment, the number of teeth of the large bevel gear Z ₃ =80, the number of teeth of the small bevel gear Z ₆ =20, from the input of the front wind wheel L ₁ to the output of the small bevel gear 6, the total speed-up ratio of the nacelle i _c =7×80×20=28 .

Formula 2 is the motion synthesis formula of the mechanical synthesis mechanism of the present invention. After the power synthesis of the front wind wheel _L1 and the rear wind wheel _L2 , the large bevel gear 3 and the small bevel gear 6 are output from the cabin and passed to the ground through the long axis 9 for speed change Box B drives generator F, which is transmitted to the ground due to the motion. The ground is not limited by space, and various speed change mechanisms can be used. In this embodiment, the CVT stepless transmission is the first choice. When the power of the wind turbine is too large, and the CVT stepless speed changer is more difficult to implement, the second plan can be selected, without self-locking speed change Speed-up gearbox.

Fig. 3 is the embodiment schematic diagram of the CVT continuously variable transmission adopted in the first embodiment of the present invention, CVT continuously variable transmission: is made up of driving wheel 16, driven wheel 19, driving wheel oil cylinder 18, driven wheel oil cylinder 20 and steel belt 17, Both the driving wheel 16 and the driven wheel 19 are combined by two conical wheels, and the pressure of the driving wheel oil cylinder 18 and the driven wheel oil cylinder 20 is adjusted by the control system, so that the combined conical wheel leaves or approaches, and the working radius of the tapered wheel is changed to reach Speed change purpose, CVT has been successfully applied in the automobile industry in recent years, and its speed range speed ratio has been realized to be 7.3, while the speed range speed ratio required by the present invention is 2. It is only used in wind power generation transmission, because the power of wind power generator is relatively large. Its structural size is also large, and at the same time, it is difficult to manufacture and relatively expensive.

Fig. 4 is the second embodiment of the present invention, which adopts a non-self-locking variable speed speed-up gearbox, which is composed of 4 shafts, 12 gears, and three sets of two-position clutches, and the speed change stage formed by three sets of two-position clutches Number E=2 ³ =8, it is eight-stage speed change, its speed regulation range R _n =2, speed common ratio φ=1.104, its speed loss is 9.4%, and an induction generator with a slip rate of 10% is used as a match. The full stepless speed regulation is realized with zero speed loss.

The invention adopts stepless speed regulation to make full use of the high-speed kinetic energy of the incoming wind to do work. The wind-driven generator cuts in and cuts _out , which is an operation cycle of the wind-driven generator. Whether it can make the due work during the entire operation cycle is the efficiency of the wind turbine generator, which directly affects the power generation of the unit. The wind speed changes greatly during an operation cycle. Assuming that the wind speed changes in an ideal state, it is the average line of wind speed fluctuations It is a linear function, based on the rated wind speed V _b , the cut-in wind speed V _a is 0.2V _b , the cut-out wind speed V _c =2V _b , and the line connecting point a through point b to point c is the average wind speed, such as Attached Figure 5:

                    

The kinetic energy E of the incoming wind is:

The power N of the wind wheel is:

In the formula, ρ is the density of the incoming wind, S is the windward area of the wind rotor, C _P is the wind energy utilization coefficient, and the work A done by the wind rotor at time t is the integral of power N to time t:

                  

The full power Ac of the wind wheel from the cut-in point a to the cut-out point c is the integral of the power to the operating time:

According to the above setting, V is a linear function, V _c =2V _b , V _a =0.2V _b , then the time is also: t _c =2t _b , t _a =0.2t _b , then,

Because (0.2) ⁴ =0.0016, the value is very small and can be ignored as 0 compared with 1, then:

Similarly, the work A _b done by the wind wheel from t _a to the rated wind speed t _b :

For wind turbines with a fixed speed-up ratio in the existing technology, the wind rotor reaches the rated wind speed V _b from the cut-in wind speed V _a , completes the work A _b , and reaches the rated speed of the best blade tip speed ratio of the wind rotor, but the wind speed It also needs to be increased to the cut-out wind speed, but due to the limitation of the rated speed of the generator and the fixed speed ratio of the system, the wind wheel can only be controlled by stalling or variable pitch, and the wind wheel can only be kept constant at the rated speed, while The speed cannot be increased as the wind speed increases, and the best blade tip speed ratio is obtained. After reaching the rated wind speed, the speed of the wind rotor _remains unchanged, that is, the rated power N _b remains unchanged. The work done by point c of V _b will be the rated power N _b multiplied by the time t from point b to point c, and because t=t _c -t _b , t _c =2t _b , then t=t _b .

Formulas 1, 2, and 3 are the work done by the wind turbine under the condition of an ideal operation cycle, but in a wind field that can be developed within one year _{, each operation cycle may not always reach the rated wind speed V b every} time. It does not necessarily reach the cut-out wind speed V _c every time, so the amount of work done by the wind turbine within a year is closely related to the specific wind field parameters. Assuming that the incoming wind speed of the wind field reaches the rated wind speed V _b or more within a year is X times, of which Y times can reach the cut-out wind speed V _c or higher.

The work A _x done by the wind power generator in the prior art in one year:

        

The work A _f done by the wind power generator of the present invention:

Compared with the prior art, the proportional coefficient Q of the present invention's power generation within one year:

,

U is the proportional coefficient of high wind speed in the wind field, which is related to the specific wind resources of the wind field. From the wind resource-developable area to the wind resource-rich area U=0.1 to 0.4, the effect of the whole machine should be included in the increase of the double wind rotors The effect of the proportional coefficient G, compared with the wind power generation of the prior art horizontal axis single wind wheel with a fixed speed-up ratio gearbox, its power generation ratio coefficient K should be the ratio coefficient G of the double wind wheel and the ratio of the gearbox. Multiply the ratio factor Q, that is:

            

Assuming that U=0.1 and C _P =0.4 of the wind field in the wind resource development zone, then:

K=GQ=1.6×1.22=1.952

From the above results, the present invention compares the power generation of the wind power generator with the horizontal axis single wind wheel fixed speed-ratio speed-increasing gear box of the most widely used prior art at present. Conservative calculation, when U=0.1, C _P =0.4, its Theoretically increase the proportional coefficient K=1.95, that is, nearly double the power.

The long shaft has heavy weight, heavy bearing load, and low mechanical efficiency. Too long shaft will cause vibration. However, with the development of magnetic suspension technology, the load and efficiency of bearings have been solved. The shaft length can be added to the middle magnetic suspension shaft, and the vibration problem is also solved. After the major axis 9 is installed, the high-speed and vulnerable parts and the control box are all located on the ground, and its maintenance cost can be greatly reduced.

Claims (6)

1. A magnetic levitation double wind turbine wind generator, including a nacelle (C) erected on a truss tower (11), characterized in that: the two ends of the nacelle (C) are respectively equipped with front wind turbines with the same parameters and opposite directions. The wind wheel (L1) and the rear wind wheel (L2), the front wind wheel (L1) and the rear wind wheel (L2) respectively through the front wind wheel shaft (1) and the rear wind wheel shaft (2) and the mechanical synthesis mechanism in the nacelle (C) (H) connection, the mechanical synthesis mechanism (H) is connected to the variable speed increasing box (B) at the bottom of the truss tower (11) through the magnetic levitation long axis (9), and the variable speed increasing box (B) is connected to the generator (F). 2. The magnetic levitation double wind turbine wind power generator according to claim 1, characterized in that: the top of the truss tower (11) is provided with a radial thrust magnetic levitation bearing (10) connected to the long axis (9) of the maglev, and the truss A radial magnetic suspension bearing (12) for fixing the magnetic suspension long axis (9) is arranged inside the tower (11). 3. The wind power generator with magnetic levitation double wind rotors according to claim 1, characterized in that: the mechanical synthesis mechanism (H) is a differential gear train structure composed of cylindrical gears, and the mechanical synthesis mechanism (H) is connected with the front wind The wheel (L1) and the rear wind wheel (L2) rotate coaxially. 4. The wind power generator with magnetic levitation double wind rotors according to claim 1, characterized in that: the variable speed increaser box (B) is a CVT continuously variable transmission or a non-self-locking variable speed increaser gearbox. 5. The wind power generator with magnetic levitation double wind rotors according to claim 3, characterized in that: the mechanical combination mechanism (H) includes a front central gear (5) connected to the front rotor shaft (1) and a rear rotor shaft ( 2) The rear sun gear (8), the front sun gear (5) and the rear sun gear (8) are surrounded by the front planetary gear (4) and the rear planetary gear (7), respectively, and the corresponding front planetary gear (4) ) and the rear planetary gear (7) are connected with a transmission shaft, and a planet carrier large bevel gear (3) connected to the transmission shaft is arranged above it, and the planet carrier large bevel gear (3) is linked with the small bevel gear (6) below, A magnetic levitation major shaft (9) is installed on the small bevel gear (6). 6. The magnetic levitation double wind turbine wind generator according to claim 4, characterized in that: the CVT continuously variable transmission includes a driving wheel (16) installed with a driving wheel cylinder (18), and the driving wheel (16) passes through a steel belt (17) is connected with the driven wheel (19) that driven wheel oil cylinder (20) is installed, and driving wheel (16) and driven wheel (19) are all combined by two cone wheels.

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