Speed-adjustable vertical axis wind turbine

Abstract

The utility model discloses a speed-adjustable vertical axis wind turbine which comprises an impeller system, a main shaft system, an adjustable speed increasing system, a permanent magnet power generation system and a tower system. The impeller system is fixed to the main shaft system through bolts, the input end of the adjustable speed increasing system is connected with the main shaft system through a coupler, the output end of the adjustable speed increasing system is connected with the permanent magnet power generation system through a coupler, and the permanent magnet power generation system is fixed to the tower system. The planetary gear rotating speed of the planetary transmission device can be detected through the speed sensor, and the speed regulating motor is controlled through signal processing to drive the gear ring of the secondary planetary row to rotate, so that the stable output rotating speed of the center wheel is obtained; and the effects of reducing the size of the wind driven generator and reducing the cost under the same power are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical axis wind turbines, in particular to a speed-adjustable vertical axis wind turbine. Background Art

[0002] At present, vertical axis wind turbines generally use an impeller system fixed on the main shaft. The main shaft is fixed on the tower through bearings and connected to the low-speed permanent magnet generator rotor. The low-speed permanent magnet generator stator is fixed to the supporting tower. Wind energy drives the impeller system to rotate, and the rotating impeller mechanical energy is transmitted to the permanent magnet generator rotor through the main shaft. The rotation of the generator rotor converts the mechanical energy into relative motion between the rotor magnet and the stator coil, thereby converting the mechanical energy into electrical energy. However, the low-speed generators in existing wind turbines may overspeed when the wind speed increases, resulting in damage and high generator costs. Utility Model Content

[0003] The utility model aims to solve the deficiencies in the prior art and provides a speed-adjustable vertical axis wind turbine. An electronically controlled speed-regulating speed-increasing box is added between the main shaft and the generator. The electronically controlled speed-regulating speed-increasing box is connected to a permanent magnet generator with a relatively high speed, so as to solve the problem that the original low-speed generator may be damaged by overspeeding when the wind speed increases and the high cost of the generator.

[0004] To achieve the above-mentioned purpose, the technical solution provided by the utility model is: an adjustable speed vertical axis wind turbine, comprising an impeller system, a main shaft system, a permanent magnet power generation system and a tower system, wherein the impeller system is fixed to the main shaft system by bolts, and the permanent magnet power generation system is fixed to the tower system. The wind turbine also includes an adjustable speed increasing system, wherein the input end of the adjustable speed increasing system is connected to the main shaft system through a coupling, and the output end of the adjustable speed increasing system is connected to the permanent magnet power generation system through a coupling; the adjustable speed increasing system includes a speed sensor, a control system, a planetary transmission device, a speed regulating motor, an electromagnetic clutch and a lubrication system, wherein the input end of the planetary transmission device is connected to the main shaft system, and the output end of the planetary transmission device is connected to the rotor of the speed regulating motor through an electromagnetic clutch, the speed sensor is respectively installed at the input end of the planetary transmission device and the speed regulating motor and is communicatively connected to the control system, and the lubrication system is connected to the planetary transmission device.

[0005] Furthermore, the spindle system includes a spindle, a bearing seat and a bearing mounted on the bearing seat, and the spindle is mounted on the bearing.

[0006] Furthermore, the tower system includes a base and a tower pole installed on the base.

[0007] Furthermore, the permanent magnet power generation system includes a permanent magnet generator and a controller, the controller is communicatively connected to the permanent magnet generator, the permanent magnet generator includes a stator and a rotor, the rotor is connected to the output end of the planetary transmission device through a coupling, and the stator is fixed on the tower pole of the tower system.

[0008] Furthermore, the planetary transmission device includes a primary planetary gear and a secondary planetary gear, the input end of the primary planetary gear is connected to the main shaft of the main shaft system, the primary planetary gear is connected to the secondary planetary gear through a sun gear, the output end of the secondary planetary gear is connected to the rotor of the permanent magnet generator, and the output end of the secondary planetary gear is connected to the rotor of the speed regulating motor through an electromagnetic clutch.

[0009] Furthermore, the impeller system includes blades and supporting rods connected to the blades.

[0010] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0011] 1. The utility model can detect the planetary gear speed of the planetary transmission device through a speed sensor, and control the speed regulating motor to drive the rotation of the gear ring of the secondary planetary gear row through signal processing to obtain a stable output speed of the center wheel;

[0012] 2. The utility model obtains a higher speed by regulating the speed of the adjustable speed increasing system, thereby increasing the speed of the permanent magnet generator, achieving the effect of reducing the volume of the wind turbine generator and reducing costs under the same power. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is one of the structural schematic diagrams of the utility model.

[0014] Figure 2 This is the second structural schematic diagram of the present utility model. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with specific embodiments.

[0016] See also Figure 1 to Figure 2 As shown, the adjustable speed vertical axis wind turbine provided in this embodiment includes an impeller system 1, a main shaft system 2, an adjustable speed increasing system 3, a permanent magnet power generation system 4 and a tower system 5;

[0017] The impeller system 1 is fixed to the main shaft system 2 by bolts, the input end of the adjustable speed increasing system 3 is connected to the main shaft system 2 through a coupling (not shown in the figure), and the output end of the adjustable speed increasing system 3 is connected to the permanent magnet power generation system 4 through a coupling (not shown in the figure), and the permanent magnet power generation system 4 is fixed to the tower system 5;

[0018] The impeller system 1 comprises blades 101 and supporting rods connected to the blades, wherein the blades are made of glass fiber or carbon fiber, or aluminum alloy;

[0019] The spindle system 2 includes a spindle, a bearing seat and a bearing mounted on the bearing seat. The spindle is mounted on the bearing. The spindle is made of carbon steel or aluminum alloy. The spindle is supported by two bearings mounted in a cast iron or steel pipe welded bearing seat.

[0020] The adjustable speed increasing system 3 includes a speed sensor 301, a control system (not shown in the figure), a planetary transmission device, a speed regulating motor 303, an electromagnetic clutch 304 and a lubrication system 305. The planetary transmission device includes a primary planetary row 3021 and a secondary planetary row 3022. The input end of the primary planetary row 3021 is connected to the main shaft of the main shaft system 2, and the primary planetary row 3022 is connected to the secondary planetary row 3021 through a sun gear. The output end of the secondary planetary row 3022 is connected to the rotor of the permanent magnet generator 4, and the output end of the secondary planetary row 3022 is connected to the rotor of the speed regulating motor 303 through an electromagnetic clutch 304. The speed sensor 301 is respectively installed at the input end of the primary planetary row 3021 and the speed regulating motor 303 and is communicatively connected to the control system. The lubrication system 305 is connected to the planetary transmission device.

[0021] The permanent magnet power generation system 4 includes a permanent magnet generator 401 and a controller (not shown in the figure), the controller (not shown in the figure) is in communication connection with the permanent magnet generator 401, the permanent magnet generator 401 includes a stator and a rotor (not shown in the figure), the rotor (not shown in the figure) is connected to the output end of the secondary planetary gear 3022 through a coupling, and the stator is fixed on the tower pole of the tower system 5.

[0022] The tower system 5 includes a base and a tower pole installed on the base.

[0023] The working principle of the adjustable speed increasing system is as follows:

[0024] a) When the wind speed is lower than the cut-in wind speed, the speed regulating motor does not work, and the impeller system, adjustable speed increasing system, and permanent magnet generator system are all in a stationary state;

[0025] b) When the wind speed is not less than the cut-in wind speed and the impeller speed is not greater than the rated speed, the control system of the adjustable speed increasing system controls the speed regulating motor to work so that the output speed of the adjustable speed increasing system is consistent with the rated speed range of the permanent magnet generator system, and the impeller system, the adjustable speed increasing system and the permanent magnet generator system are in a direct connection state;

[0026] c) When the wind speed is less than the cut-out wind speed and the impeller speed is higher than the rated speed, the control system of the adjustable speed increasing system controls the speed regulating motor to work, stabilizes the impeller input speed at the rated speed of the permanent magnet generator system, and the excess energy is output in reverse through the speed regulating motor;

[0027] d) When the wind speed is not less than the cut-out wind speed, the electromagnetic clutch at the output end of the adjustable speed increasing system operates to generate electromagnetic braking force, and at the same time causes the permanent magnet generator system to short-circuit brake.

[0028] The embodiments described above are only preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. Therefore, all changes made based on the shape and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable speed vertical axis wind turbine, comprising an impeller system, a main shaft system, a permanent magnet power generation system and a tower system, wherein the impeller system is fixed to the main shaft system by bolts, and the permanent magnet power generation system is fixed to the tower system, characterized in that: It includes an adjustable speed increasing system, the input end of the adjustable speed increasing system is connected to the main shaft system through a coupling, and the output end of the adjustable speed increasing system is connected to the permanent magnet power generation system through a coupling; the adjustable speed increasing system includes a speed sensor, a control system, a planetary transmission device, a speed regulating motor, an electromagnetic clutch and a lubrication system, the input end of the planetary transmission device is connected to the main shaft system, the output end of the planetary transmission device is connected to the rotor of the speed regulating motor through an electromagnetic clutch, the speed sensor is respectively installed at the input end of the planetary transmission device and the speed regulating motor and is communicatively connected to the control system, and the lubrication system is connected to the planetary transmission device.

2. The speed-adjustable vertical axis wind turbine according to claim 1, characterized in that: The spindle system comprises a spindle, a bearing seat and a bearing mounted on the bearing seat, and the spindle is mounted on the bearing.

3. The speed-adjustable vertical axis wind turbine according to claim 1, characterized in that: The tower system comprises a base and a tower pole installed on the base.

4. The speed-adjustable vertical axis wind turbine according to claim 3, characterized in that: The permanent magnet power generation system includes a permanent magnet generator and a controller, the controller is communicatively connected to the permanent magnet generator, the permanent magnet generator includes a stator and a rotor, the rotor is connected to the output end of the planetary transmission device through a coupling, and the stator is fixed on the tower pole of the tower system.

5. The speed-adjustable vertical axis wind turbine according to claim 4, characterized in that: The planetary transmission device includes a primary planetary row and a secondary planetary row. The input end of the primary planetary row is connected to the main shaft of the main shaft system, the primary planetary row is connected to the secondary planetary row through a sun gear, the output end of the secondary planetary row is connected to the rotor of the permanent magnet generator, and the output end of the secondary planetary row is connected to the rotor of the speed regulating motor through an electromagnetic clutch.

6. The speed-adjustable vertical axis wind turbine according to claim 1, characterized in that: The impeller system comprises blades and supporting rods connected to the blades.

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