WO2024007928A1

WO2024007928A1 - Embedded rotor structure of wind turbine

Info

Publication number: WO2024007928A1
Application number: PCT/CN2023/103536
Authority: WO
Inventors: 沈渭清
Original assignee: 上海海外清能源科技有限公司
Priority date: 2022-07-07
Filing date: 2023-06-29
Publication date: 2024-01-11
Also published as: CN218598284U

Abstract

An embedded rotor structure of a wind turbine, comprising a blade hub (2), a motor shaft (3), a connector (4), a generator (5), and a plurality of blades (1). A sliding groove is formed in one end of each blade and the blade is gradually thinned from the end provided with the sliding groove to the other end, and sliding blocks fitted to the sliding grooves are arranged at intervals around the side wall of the blade hub; the motor shaft passes through two ends of the blade hub and is connected to the blade hub by means of the connector, and the motor shaft is connected to the generator. The device is simple in structure, convenient to use, and easy to mount, disassemble, maintain, and transport, and the wind energy utilization efficiency is improved.

Description

An embedded wind wheel structure for a wind turbine

This application claims priority to the Chinese patent application filed with the China Patent Office on July 7, 2022, with the application number 202221738163.6 and the utility model name "An embedded wind wheel structure for wind turbines", the entire content of which is incorporated by reference. incorporated in this application.

Technical field

The utility model relates to the technical field of wind power generation, and in particular to an embedded wind wheel structure of a wind power generator set.

Background technique

Wind power generation is a technology that uses wind power to drive the windmill blades to rotate, and then uses a speed increaser to increase the speed of rotation to prompt the generator to generate electricity. The wind wheel is the main component of the wind turbine that converts wind energy into mechanical energy. Currently, the most widely used type of wind wheel on the market is the horizontal-axis three-bladed wind wheel. However, this type of wind wheel has shortcomings such as complex structure, large energy loss, and inconvenient loading, unloading and maintenance. Therefore, designing a wind turbine rotor that can improve wind energy utilization efficiency and facilitate loading, unloading and maintenance is an issue worth exploring.

Utility model content

The purpose of this utility model is to solve the above problems and provide an embedded wind wheel structure of a wind power generator set that is easy to assemble, disassemble and maintain, and to improve the efficiency of wind energy utilization.

In order to achieve the above purpose, the specific technical solution of an embedded wind wheel structure of a wind turbine provided by the present invention is as follows:

An embedded wind wheel structure of a wind turbine, including a blade tube, a motor shaft, a connector, a generator and multiple sets of blades; one end of the blades is provided with a chute, and the blade is opened from the end where the chute is provided. It gradually becomes thinner toward the other end; slide blocks matching the chute are arranged at intervals around the side wall of the blade tube; the motor shaft penetrates both ends of the blade tube and is connected to the blade tube through the connector , the motor shaft is connected to the generator.

Further, the blade includes a windward surface and a leeward surface, and an end of the windward surface away from the blade tube is connected to the leeward surface.

Furthermore, the windward surface is a curved surface and is recessed toward the inside of the blade.

Further, the angle between the leeward surface and the blade tube side wall section inside the blade is Between 20 degrees and 45 degrees.

Further, the connectors are provided at both ends of the blade cylinder and the outer end of the connector protrudes from the blade cylinder.

Furthermore, a braking device is provided on the motor shaft.

Further, the blades are hollow blades.

Further, both ends of the blade tube are connected, and the generator is arranged in the blade tube cavity.

The utility model provides an embedded wind rotor structure for a wind power generator set which has the following advantages: simple structure and convenient assembly. The sliding component structure is provided between the blade tube and the blades, making the wind power generator set easy to install, disassemble, maintain and transport. The curved surface design of the blade increases the force-bearing area of the blade, improves the utilization efficiency of wind energy, and can solve the problems of large energy loss of existing wind turbines and inconvenient loading, unloading and maintenance to a certain extent.

Instructions with pictures

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting any creative effort.

Figure 1 is a schematic three-dimensional structural diagram of a wind wheel structure of a wind turbine provided by the utility model;

Figure 2 is a schematic plan view of the blade and blade tube in the embodiment of the present utility model;

Figure 3 is a schematic diagram of the exploded structure of the connector, blades and blade barrel in the embodiment of the present invention.

Description of markings in the picture:

Blade-1, windward side-11, leeward side-12, chute-13, blade tube-2, slider-21, motor shaft-3, connector-4, generator-5.

Detailed ways

The implementation of the present invention is described below with specific examples. Those familiar with the technology can easily understand other advantages and effects of the present invention from the content disclosed in this specification. In order to better understand the purpose, structure and function of the present utility model, the embedded wind wheel structure of a wind turbine generator set of the present utility model will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the first embodiment of the present invention includes a blade 1, a blade cylinder 2, a motor shaft 3, a connector 4 and a generator 5. The blades 1 can be arranged at intervals around the side wall of the blade cylinder 2, and the motor shaft 3 can penetrate both ends of the blade cylinder 2, and be fixedly connected to the blade cylinder 2 through the connectors 4 provided at both ends of the blade cylinder 2, so that the blade cylinder 2 can follow the blade cylinder 2. When the blade 1 rotates, the motor shaft 3 is driven to rotate. The motor shaft 3 can be connected to the generator 5 to convert mechanical work into electrical energy.

Among them, as shown in Figures 2 and 3, one end of the blade 1 close to the blade tube 2 is provided with a chute 13, and the blade tube 2 is provided with slide blocks 21 that match the chute 13 at intervals, making the installation and removal of the blade 1 easy. Very convenient. Moreover, the blade 1 gradually becomes thinner from one end where the chute 13 is provided to the other end, which can prevent the blade 1 from breaking during use and reduce maintenance costs. In addition, the blade 1 can be composed of a windward surface 11 and a leeward surface 12. The windward surface 11 and the leeward surface 12 are connected at an end away from the blade tube 2. The windward surface 11 can also be set as a curved surface that is concave toward the inside of the blade 1, so that Increase the stress-bearing area of blade 1. According to the wind energy calculation formula It can be seen that the wind energy E is proportional to the area s through which the wind flows, that is, the wind energy is proportional to the swept area of the wind turbine when the wind turbine rotates. Therefore, increasing the force-bearing area of the blades can effectively improve the utilization of wind energy. efficiency. The angle between the leeward surface 12 and the side wall section of the blade tube 2 inside the blade 1 is between 20 degrees and 45 degrees, which can reduce the wind resistance of the leeward surface as much as possible.

In addition, connectors 4 are provided at both ends of the blade cylinder 2, which can fix the position between the motor shaft 3 and the blade cylinder 2. The outer end of the connector 4 protrudes from the blade cylinder 2 and is fixed on the blade cylinder 2 through a threaded structure. In this way, the longitudinal position of the blade 1 can be fixed, and the blade 1 can be limited and reinforced.

In other embodiments of the present invention, a braking device can also be provided on the motor shaft 3. When the rotation speed of the motor shaft 3 exceeds a preset threshold, the braking device can limit the rotation speed of the motor shaft 3 and prevent the wind turbine from of damage. In addition, the blade 1 can also be made of hollow blades made of high-strength and lightweight materials to reduce the mass of the wind turbine and facilitate transportation and assembly. The blade tube 2 can also be configured as a hollow tube that passes up and down, and the generator 5 is arranged in the inner cavity of the blade tube 2 to reduce the space occupied by the wind turbine. In actual use, multiple sets of wind wheel structures can also be combined in Use together to improve power generation efficiency.

Although the present utility model has been described in detail with general descriptions and specific examples above, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present utility model. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

An embedded wind wheel structure for a wind turbine, which is characterized in that it includes a blade tube, a motor shaft, a connector, a generator and multiple sets of blades; one end of the blade is provided with a chute and the blade is provided with the One end of the chute gradually becomes thinner toward the other end; slide blocks matching the chute are arranged at intervals around the side wall of the blade tube; the motor shaft penetrates both ends of the blade tube and is connected to the blade tube through the connector. The blade cylinder is connected, and the motor shaft is connected with the generator.
An embedded wind wheel structure for a wind turbine according to claim 1, wherein the blade includes a windward surface and a leeward surface, and an end of the windward surface away from the blade tube is opposite to the leeward surface. catch.
The embedded wind rotor structure of a wind turbine according to claim 2, wherein the windward surface is a curved surface and is recessed toward the inside of the blade.
An embedded wind rotor structure for a wind turbine according to claim 2, characterized in that the angle between the leeward surface and the side wall section of the blade inside the blade is between 20 degrees and 45 degrees. between.
The embedded wind rotor structure of a wind turbine according to claim 1, wherein the connectors are provided at both ends of the blade tube and the outer end of the connector protrudes from the blade tube.
The embedded wind wheel structure of a wind power generator set according to claim 1, characterized in that the motor shaft is also provided with a braking device.
An embedded wind rotor structure for a wind turbine according to claim 1, wherein the blades are hollow blades.
The embedded wind wheel structure of a wind turbine according to claim 1, wherein the two ends of the blade tube are connected, and the generator is arranged in the blade tube cavity.