A vertical axis double rotor wind turbine

Abstract

The invention belongs to the technical field of power generation equipment, and specifically relates to a vertical axis dual-rotor wind turbine generator, whose main structure comprises a winding upper end cover, a winding shell, a winding lower end cover, a base, an upper connecting flange, a permanent magnet rotor shaft, a permanent magnet rotor, a permanent magnet rotor upper bearing, a permanent magnet rotor lower bearing, a winding, a wire channel, a winding rotor upper bearing, a winding rotor lower bearing, a collector ring, a carbon brush, a carbon brush holder, an oil-proof baffle, a partition, a magnetic suspension weight reduction component, a lower connecting flange and a fixing plate; the vertical axis dual-rotor wind turbine generator designed by the invention has a reasonable structural design and a reliable principle. The winding and the magnet winding of the generator both rotate in opposite directions as rotors, thereby improving the efficiency of power generation, and is easy to manufacture and install, and has a friendly application environment.

Description

Technical field:

[0001] The invention belongs to the technical field of power generation equipment, and in particular relates to a vertical axis double-rotor wind turbine generator, which utilizes the reverse rotation of the winding and magnet double rotors to improve power generation efficiency. Background technology:

[0002] The principle of generator power generation is to use the external mechanical force to drive the conductor coil to rotate in the magnetic field, and continuously cut the magnetic flux lines to generate induced electromotive force and output electricity. Traditional wind power generation equipment generally has a fixed stator, and the blades drive the rotor to rotate relative to the stator. Each rotation of the blades drives the rotor to rotate once, and its power generation efficiency is low. In order to improve the power generation efficiency of the generator, people have developed a dual-rotor generator. The winding and magnet winding of the dual-rotor generator rotate in opposite directions at the same time, which makes more effective use of wind energy and improves the efficiency of power generation.

[0003] In the prior art, the utility model patent with application number 201520640863.5 discloses a vertical axis dual rotor generator, including a generator shaft, an inner rotor assembly, an outer rotor assembly and a collector ring assembly, wherein the generator shaft is vertically arranged, and the lower end is rotatably arranged in a cylindrical base; the inner rotor assembly includes a winding fixed on the generator shaft, the outer rotor assembly includes a housing rotatably arranged on the generator shaft and a magnet fixed on the inner wall of the housing, the magnet is arranged around the winding, and the generator shaft and the housing are respectively provided with inner and outer rotor driving devices with opposite directions; the collector ring assembly includes a conductive ring, a brush and a brush fixing frame, the conductive ring is fixed on the outer circumferential surface of the base and is electrically connected to the winding, and the brush is arranged on the brush fixing frame and matched with the conductive ring. The utility model fixing seat is at the bottom, and the two pulleys are arranged at the top. This structure is too far away from the pulley, which is easy to vibrate, and even the shaft and base are broken, affecting the smooth operation. In the invention patent with application number 201810592738.X, a wind power generation device is disclosed, including a pole tower, a dual-rotor generator and blades. The top of the pole tower is fixedly connected to the dual-rotor generator, and the two rotating shafts of the dual-rotor generator are fixedly connected with two symmetrical blades. The present invention adopts a dual-rotor generator, and the dual rotors rotate in opposite directions. The relative speed is increased by 1 times compared with the stator and the rotor, and its energy will be greatly improved. The greater the converted electric energy, the greater the relative speed of the dual rotors, and the effective utilization of wind energy at low wind speeds, the higher the energy utilization rate, and effectively solves the problem of power generation at low speeds. Moreover, the two-blade rotation has a faster speed, and the electric energy is further converted. The two rotating shafts of the invention are both supported by two side-by-side bearings at a single point. The structure is not stable enough, and it is difficult to achieve center of gravity balance. Under the pull of the magnetic field and the eccentric torque of the wind blades, it is easy to cause a sweeping accident.

[0004] In summary, no dual-rotor wind turbine with a reasonable mechanical structure, convenient processing and easy application has been found in the prior art. Summary of the invention:

[0005] The purpose of the present invention is to overcome the defects of the prior art, to address the problems that the power generation efficiency of wind turbines is low and the mechanical structure of the existing dual-rotor wind turbines is not suitable for practical use, and to seek to design a vertical axis dual-rotor wind turbine under the conditions of being capable of mass production, having a reasonable structure and low cost.

[0006] In order to achieve the above-mentioned purpose, the vertical axis dual-rotor wind turbine disclosed by the present invention has a main structure including a winding upper end cover, a winding shell, a winding lower end cover, a base, an upper connecting flange, a permanent magnet rotor shaft, a permanent magnet rotor, a permanent magnet rotor upper bearing, a permanent magnet rotor lower bearing, a winding, a wire channel, a winding rotor upper bearing, a winding rotor lower bearing, a collector ring, a carbon brush, a carbon brush holder, an oil-proof baffle, a partition, a magnetic suspension weight reduction assembly, a lower connecting flange and a fixing plate; the lower end of the winding lower end cover is a hollow shaft, which is rotatably fixed in the hole of the base through the winding rotor upper bearing and the winding rotor lower bearing, the cylindrical winding shell is fixedly arranged above the winding lower end cover, the winding upper end cover is fixed on the winding shell, and a through hole is arranged in the center of the winding upper end cover; the winding is fixedly arranged on the inner wall of the winding shell; the lower connecting flange is fixedly connected The lower surface of the end cover connected to the lower end cover of the winding is fixedly connected to the external lower wind blade; the collector ring is sleeved on the lower end of the lower end cover of the winding, and the lower end cover of the winding is provided with a plurality of wire channels which extend obliquely upward from the central axis hole to the upper surface of the lower end cover of the winding, and the wire passes through the wire channels and the central axis hole of the lower end cover of the winding to electrically connect the winding with the collector ring; one end of the permanent magnet rotor shaft passes through the hole on the upper end cover of the winding and extends into the interior of the winding housing, and the permanent magnet rotor is arranged on the permanent magnet rotor shaft in the winding housing; the permanent magnet rotor shaft is rotatably connected to the upper end cover of the winding through the upper bearing of the permanent magnet rotor, and is rotatably connected to the lower end cover of the winding through the lower bearing of the permanent magnet rotor; the upper connecting flange is fixed to the upper end of the permanent magnet rotor shaft, and the upper connecting flange is connected to the external upper wind blade, and the blade direction of the upper wind blade is opposite to that of the lower wind blade of the lower connecting flange.

[0007] The magnetic levitation weight reduction assembly described in the present invention includes an upper magnetic ring group and a lower magnetic ring group; the upper magnetic ring group is a group of cylindrical magnets that are opposite to each other up and down, with a gap between the upper and lower parts, the upper part of the upper magnetic ring group is fixed to the lower surface of the permanent magnet rotor shaft, and the lower part of the upper magnetic ring group is embedded in the lower end cover of the winding; the lower magnetic ring group is an annular magnet that is opposite to each other up and down, the upper half of the lower magnetic ring group is arranged on the lower surface of a fixed plate fixedly connected to the lower end cover of the winding, and the lower half of the lower magnetic ring group is arranged on a partition, and the partition is fixedly connected to the base; the magnetic poles of the upper and lower relative surfaces of the upper magnetic ring group and the lower magnetic ring group are the same, and the upward magnetic force is used to reduce the axial load on the permanent magnet rotor upper bearing, the permanent magnet rotor lower bearing, the winding rotor upper bearing and the winding rotor lower bearing, thereby reducing the wear of the bearings and improving the running stability.

[0008] The outer ring of the lower connecting flange of the present invention has a downwardly protruding chamfer, which can prevent rainwater from flowing along the surface into the interface between the base and the lower end cover of the winding.

[0009] The vertical axis dual-rotor wind turbine described in the present invention is characterized in that an oil-proof baffle is arranged between the lower bearing of the winding rotor and the collector ring to prevent the lubricating oil of the bearing from splashing onto the collector ring and affecting the electrical contact between the collector ring and the carbon brush.

[0010] The carbon brush holder of the present invention is fixedly arranged inside the base, the carbon brush is fixed on the carbon brush holder by a spring, the carbon brush contacts the collector ring and is compressed by the spring, so as to transfer the electric energy generated on the winding to the outside of the generator.

[0011] Compared with the prior art, the vertical axis dual-rotor wind turbine designed in the present invention has a reasonable structural design and a reliable principle. The winding and magnet winding of the generator both rotate in opposite directions as rotors, thereby improving the efficiency of power generation. The invention is easy to manufacture and install and has a friendly application environment. Description of the drawings:

[0012] Figure 1 The present invention is a schematic diagram of the main structural principle of the vertical-axis dual-rotor wind turbine generator. Specific implementation method:

[0013] The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings.

[0014] Embodiment 1:

[0015] The vertical axis dual-rotor wind turbine involved in this embodiment has a main structure including a winding upper end cover 1, a winding housing 2, a winding lower end cover 3, a base 4, an upper connecting flange 5, a permanent magnet rotor shaft 6, a permanent magnet rotor 7, a permanent magnet rotor upper bearing 8, a permanent magnet rotor lower bearing 9, a winding 10, a wire channel 11, a winding rotor upper bearing 12, a winding rotor lower bearing 13, a collector ring 14, a carbon brush 15, a carbon brush holder 16, an oil-proof baffle 17, a partition 18, an upper magnetic ring group 19, The lower magnetic ring group 20, the lower connecting flange 21 and the fixing plate 22; the lower end of the winding lower end cover 3 is a hollow shaft, which is rotatably fixed in the hole of the base 4 through the winding rotor upper bearing 12 and the winding rotor lower bearing 13; the cylindrical winding shell 2 is fixedly arranged above the winding lower end cover 3, the winding upper end cover 1 is fixed on the winding shell 2, and a through hole is arranged in the center of the winding upper end cover 1; the winding 10 is fixedly arranged on the inner wall of the winding shell 2; the lower connecting flange 21 is fixedly connected The lower surface of the end cover of the winding lower end cover 3 is provided, and the outer circle of the lower connecting flange 21 has a downwardly protruding chamfer, which can prevent rainwater from flowing along the surface into the interface between the base 4 and the winding lower end cover 3. The lower connecting flange 21 is fixedly connected to the external lower wind blade; the winding lower end cover 3 is provided with a plurality of wire channels 11 which lead obliquely upward from the central axis hole to the upper surface of the winding lower end cover 3; the collector ring 14 is mounted on the lower end of the winding lower end cover 3, and the electric energy generated by the winding 10 is transmitted by the wire through the wire channel The electric energy generated by the winding 10 is transmitted to the outside of the generator through the central axis hole of the channel 11 and the lower end cover 3 of the winding; the carbon brush holder 16 is fixedly arranged inside the base, and the carbon brush 15 is fixed to the carbon brush holder 16 by a spring. The carbon brush 15 is in contact with the collector ring 14 and is compressed by the spring to transmit the electric energy generated by the winding 10 to the outside of the generator; the oil-proof baffle 17 is arranged between the lower bearing 13 of the winding rotor and the collector ring 14 to prevent the lubricating oil of the bearing from splashing onto the collector ring 14 and affecting the electrical contact between the collector ring 14 and the carbon brush 15.

[0016] One end of the permanent magnet rotor shaft 6 extends into the interior of the winding housing 2 through the hole on the winding upper end cover 1. The permanent magnet rotor 7 is arranged on the permanent magnet rotor shaft 6 in the winding housing 2, and its position corresponds to the winding 10. The permanent magnet rotor shaft 6 is rotatably connected to the winding upper end cover 1 through the permanent magnet rotor upper bearing 8, and is rotatably connected to the winding lower end cover 3 through the permanent magnet rotor lower bearing 9. The upper connecting flange 5 is fixed to the upper end of the permanent magnet rotor shaft 6, and the upper connecting flange 5 is connected to the external upper wind blade, and the blade direction of the upper wind blade is opposite to that of the lower wind blade of the lower connecting flange 21.

[0017] The upper magnetic ring group 19 is a group of cylindrical magnets facing each other up and down, with a gap between the upper and lower parts. The upper part of the upper magnetic ring group 19 is fixed on the lower surface of the permanent magnet rotor shaft 6, and the lower part of the upper magnetic ring group 19 is embedded in the winding lower end cover 3; the lower magnetic ring group 20 is an annular magnet facing each other up and down, the upper half of the lower magnetic ring group 20 is arranged on the lower surface of the fixing plate 22 fixedly connected to the winding lower end cover 3, and the lower half of the lower magnetic ring group 20 is arranged on the partition 18, and the partition 18 is fixedly connected to the base 4; the magnetic poles of the upper and lower relative surfaces of the upper magnetic ring group 19 and the lower magnetic ring group 20 are the same, and the upward magnetic force is used to reduce the axial load on the permanent magnet rotor upper bearing 8, the permanent magnet rotor lower bearing 9, the winding rotor upper bearing 12 and the winding rotor lower bearing 13, thereby reducing the wear of the bearings and improving the running stability.

[0018] When the present embodiment is working, the upper wind blade drives the upper connection flange 5, the permanent magnet rotor shaft 6, and the permanent magnet rotor 7 to rotate forward, and the lower wind blade drives the lower connection flange 21, the winding upper end cover 1, the winding housing 2, the winding lower end cover 3, the winding 10, and the collector ring 14 to rotate reversely, so that the winding 10 and the permanent magnet rotor 7 obtain a relative rotation speed double that of a single rotor, and the generated electric energy is transmitted to the outside of the generator through the collector ring and the carbon brush. Compared with the traditional single-rotor generator, the present embodiment effectively utilizes wind energy at low wind speeds and has a higher electric energy conversion efficiency.

Claims

1. A vertical axis dual-rotor wind turbine, characterized in that: The main structure includes a winding upper end cover, a winding shell, a winding lower end cover, a base, an upper connecting flange, a permanent magnet rotor shaft, a permanent magnet rotor, a permanent magnet rotor upper bearing, a permanent magnet rotor lower bearing, a winding, a wire channel, a winding rotor upper bearing, a winding rotor lower bearing, a collector ring, a carbon brush, a carbon brush holder, an oil-proof baffle, a partition, a magnetic suspension weight reduction assembly, a lower connecting flange and a fixing plate; the lower end of the winding lower end cover is a hollow shaft, which is rotatably fixed in the hole of the base through the winding rotor upper bearing and the winding rotor lower bearing, the cylindrical winding shell is fixedly arranged above the winding lower end cover, the winding upper end cover is fixed on the winding shell, and a through hole is arranged in the center of the winding upper end cover; the winding is fixedly arranged on the inner wall of the winding shell; the lower connecting flange is fixedly connected to the lower surface of the end cover of the winding lower end cover, The lower connecting flange is fixedly connected to the external lower wind blade; the collector ring is sleeved on the lower end of the winding lower end cover, and the winding lower end cover is provided with a plurality of wire channels which extend obliquely upward from the central axis hole to the upper surface of the winding lower end cover, and the wire passes through the wire channel and the central axis hole of the winding lower end cover to electrically connect the winding with the collector ring; one end of the permanent magnet rotor shaft passes through the hole on the winding upper end cover and extends into the interior of the winding housing, and the permanent magnet rotor is arranged on the permanent magnet rotor shaft in the winding housing; the permanent magnet rotor shaft is rotatably connected to the winding upper end cover through the permanent magnet rotor upper bearing, and is rotatably connected to the winding lower end cover through the permanent magnet rotor lower bearing; the upper connecting flange is fixed to the upper end of the permanent magnet rotor shaft, and the upper connecting flange is connected to the external upper wind blade, and the blade direction of the upper wind blade is opposite to that of the lower wind blade of the lower connecting flange; The magnetic suspension weight reduction assembly comprises an upper magnetic ring group and a lower magnetic ring group; The upper magnetic ring group is a group of cylindrical magnets that are opposite to each other up and down, with a gap between the upper and lower parts. The upper part of the upper magnetic ring group is fixed on the lower surface of the permanent magnet rotor shaft, and the lower part of the upper magnetic ring group is embedded in the lower end cover of the winding; the lower magnetic ring group is an annular magnet that is opposite to each other up and down, the upper half of the lower magnetic ring group is arranged on the lower surface of the fixed plate fixedly connected to the lower end cover of the winding, and the lower half of the lower magnetic ring group is arranged on the partition, and the partition is fixedly connected to the base; the magnetic poles of the upper and lower relative surfaces of the upper magnetic ring group and the lower magnetic ring group are the same, and the upward magnetic force is used to reduce the axial load on the permanent magnet rotor upper bearing, the permanent magnet rotor lower bearing, the winding rotor upper bearing and the winding rotor lower bearing, thereby reducing the wear of the bearings and improving the running stability.

2. The vertical axis dual-rotor wind turbine according to claim 1, characterized in that: The outer ring of the lower connecting flange has a downwardly protruding chamfer, which can prevent rainwater from flowing along the surface into the interface between the base and the lower end cover of the winding.

3. The vertical axis dual-rotor wind turbine according to claim 1, characterized in that: The oil-proof baffle is arranged between the lower bearing of the winding rotor and the collector ring to prevent the lubricating oil of the bearing from splashing onto the collector ring and affecting the electrical contact between the collector ring and the carbon brush.

4. The vertical axis dual-rotor wind turbine according to claim 1, characterized in that: The carbon brush holder is fixedly arranged inside the base, and the carbon brush is fixed on the carbon brush holder by a spring. The carbon brush contacts the collector ring and is compressed by the spring to transfer the electric energy generated on the winding to the outside of the generator.

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