Load balance type vertical axis wind turbine

Abstract

The invention discloses a load balance type vertical axis wind turbine. The load balance type vertical axis wind turbine comprises a power transmission device, wind turbine blades and fixing rods, wherein the wind turbine blades are fixedly connected and matched with the power transmission device through the fixing rods; the power transmission device comprises a main motor shaft, a motor arranged in the middle of the main motor shaft, an upper rotation sleeve coaxially and fixedly arranged at the part, located above the motor, of the periphery of the main motor shaft and a lower rotation sleeve coaxially and fixedly arranged at the part, located below the motor, of the periphery of the main motor shaft; the power transmission device is of an axial symmetry structure with the motor as the center. According to the load balance type vertical axis wind turbine, the influence of additional radial force and bending moment to the operating efficiency of the wind turbine and the service life of bearings in the rotation process of a wind wheel can be effectively reduced and balanced, the structural rigidity of the wind wheel can be improved, and the operating stability can be improved.

Description

technical field [0001] The invention relates to the technical field of wind power generators, in particular to a load-balanced vertical axis wind power generator. Background technique [0002] At present, vertical axis wind turbines generally adopt the cantilever long axis structure to install the wind rotor blades, and its structure is as follows: figure 1 As shown, it includes the main shaft of the motor, the rotary shaft set outside the main shaft of the motor, the motor arranged under the main shaft of the motor, and the coupling connecting the motor with the main shaft of the motor, and the blades of the wind rotor are connected with the main shaft of the motor through the connecting arm. And take the motor shaft as the axis of rotation. There are several problems in the vertical axis wind power generator with integrated structure of the wind wheel mechanism and the generator as follows: [0003] (1) Cantilever long shaft structure, the ratio of the length of the exte...

AI Technical Summary

Problems solved by technology

The structural rigidity of the impeller is poor, the running stability is poor, and the additional bending moment will directly affect the operating efficiency and operating life of the generator

[0004] (2) The assembly process of the cantilever long shaft structure is poor, such as bearing installation, stator lead welding, and generator upper and lower cover assembly, etc., are inconvenient to operate, difficult to ensure assembly quality, and even more difficult to maintain

[0005] (3) Vertical axis wind turbine with cantilever long axis structure, with huge structure size

And the mass distribution is not balanced, so the package and transportation adopt the overall structure, the size is too large, and accidents such as rollover and deformation of the main shaft of the generator are prone to occur during transportation

During on-site installation, it is inconvenient to hoist as a whole or separately, and it is easy to cause personal accidents

[0006] (4) Due to the large length-to-diameter ratio of the cantilever-type long shaft, the processing technology of the slender shaft is poor, and the processing cost is high. Regardless of assembly, transportation, installation and operation, it is easy to produce bending deformation

[0007] (5) In order to improve assembly manufacturability and facilitate assembly, transportation and installation, some vertical-axis wind turbine extension shafts adopt segmental lengthening methods and structures, but this lengthening structure solves the above-mentioned assembly manufacturability and assembly, transportation, and installation. process, but its structure and mechanical properties still cannot change the inherent technical defects

On the contrary, because the structural rigidity of the extended shaft is much lower than that of the integral shaft, the running stability is worse, and the radial force and additional bending moment are larger

[0008] To sum up, the main technical problems and defects of traditional cantilever long-axis structure vertical axis wind turbines can be attributed to: poor structural rigidity, low operating efficiency and service life, poor processing, assembly and installation process

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