CN205277683U

CN205277683U - Ladder magnus type rotor blade and wind energy conversion system

Info

Publication number: CN205277683U
Application number: CN201521086987.XU
Authority: CN
Inventors: 鲁录义; 王坤; 刘雪晴
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2015-12-23
Filing date: 2015-12-23
Publication date: 2016-06-01
Anticipated expiration: 2025-12-23

Abstract

The utility model discloses a ladder magnus type rotor blade and wind energy conversion system, the blade divide into a plurality of cylindrical sections for step cylinder shape, and the round column diameter of each section diminishes to the blade end from the root of blade piecemeal, the cylindrical section includes cylindrical internal gear, and its inner chamber all is equipped with planetary gearing. Utilize this blade, the utility model provides a wind energy conversion system is including relevant facilities such as power generation facility, wheel hub, planetary gear train interconnected system, pylons. Wheel hub installs driving motor, makes the plain vane realize the rotation of certain speed through helical drive. Different plain vane sections realize all through planetary gear train that the differential rotates, change the plain vane spin velocity through adjusting the planet wheel, guarantee the output of wind -force unit maximum power. The utility model discloses simple structure, the processing cost is low, the good reliability, wind power generation is utilized to the high efficiency.

Description

A kind of ladder Magnus type wind blade and wind energy conversion system

Technical field

This utility model belongs to technical field of wind power generation, more particularly, to a kind of Magnus type wind blade and wind energy conversion system.

Background technology

Regenerative resource is to solve the optimal path of energy crisis, and wind-power electricity generation is to develop the industry the rapidest, technology is the most ripe, prospect is the most wide in regenerative resource industry. Continuous progressive along with science and technology, the economy of wind-power electricity generation is constantly improved, and China is using the regenerative resource important component part as China's energy strategy in addition, and wind-power electricity generation has huge potential market.

Pneumatic equipment blades is the core component of Wind turbine, is directly connected to the efficiency of wind power utilization. The blade of modern wind turbine mostly is traditional airfoil blade, designs when uniform and stable based on incoming flow wind speed, does not consider the impact on efficiency of the wind-force gradient of atmospheric boundary layer. And the wind energy conversion system of real work is mostly operated in the air boundary layer within 200 meters, effect due to ground viscosity and terrain roughness, the atmospheric boundary layer place near ground is made to there is bigger wind-force gradient, this gradient effect will produce torque change and the pitching moment of blade on blade, thus causing the minimizing of output. Ensure that output does not lose the wind energy conversion system even promoted in atmospheric boundary layer hence it is imperative that a kind of.

The blade of Magnus type wind energy conversion system is based on the wind power blade of Magnus effect, can be considered the cylinder blade of rotation. Can be subject to being perpendicular to the lift of flow direction, i.e. so-called magnus force when rotor is subject to the wind effect of horizontal mobility. The blade of Magnus type wind energy conversion system is compared with traditional blades, and under identical percentage of blade surface area, the lift of Magnus blade is more than ten times of traditional airfoil blade lift, therefore has obvious advantage in generating efficiency. Existing Magnus type pneumatic equipment blades is the straight cylinder type of isometrical design, shears efficiency under wind effect at atmospheric boundary layer and reduces, and its strength of materials requires height, is not suitable with wind energy conversion system maximization development.

Summary of the invention

For disadvantages described above or the Improvement requirement of prior art, this utility model provides a kind of Novel wind blade and wind energy conversion system, its object is to improve the output of blade working efficiency and wind energy conversion system, thus solves the technical problem that generating efficiency is low.

For achieving the above object, according to an aspect of the present utility model, it is provided that a kind of ladder Magnus type wind blade, it is characterized in that, described blade is stepped cylindrical shape, is divided into some cylindrical sections, each section of body diameter, diminishes piecemeal from root of blade to blade end;

Described cylindrical section includes circular internal gear, and its inner chamber is equipped with planetary gear system (4), and described planetary gear system (4) inner chamber is provided with central gear between two parties, and each section of central gear is coaxial; Each central gear and engages with upper planetary gear by three with gear ring, and for ring gear against rotation is passed to central gear, and the differential realizing each cylindrical section rotates.

Based on above-mentioned blade, the utility model proposes a kind of Magnus type wind energy conversion system, including pylon (5), TRT (1) and three and above-described blade, it is characterised in that:

Described blade is connected by root cylindrical section and wheel hub are fixing, relative to the circularly symmetric distribution of hub centre; Described hub interior is provided with motor, for the circular internal gear rotation of driven vane root cylindrical section, for driving the rotation of other cylindrical section;

In work, under the drive of wind-force, each blade rotates, and drives wheel hub to rotate, converts wind energy into mechanical energy, sends into TRT.

Further, in described Magnus type wind energy conversion system, between motor (7) and root cylindrical section, it is provided with helical gear (8), for realizing the power transmission between motor and cylindrical section circle internal gear.

Further, in described Magnus type wind energy conversion system, the blade of circle angular distribution such as including five.

Further, in described Magnus type wind energy conversion system, in each cylindrical section inner planet gear system, the gear ratio of gear ring and sun gear, planetary gear designs according to actual condition.

This utility model is based on Magnus effect and designs, the blade that the utility model proposes, with certain speed rotation. Consider that atmospheric boundary layer exists the impact of wind-force gradient and structural strength, each blade design is become the some sections of centric leaf fragments needed, the intersegmental rotation at different rates of different blades is made by planet gear transmission system, regulating the rotating speed of different centric leaf fragment can make the whole blade can with optimal velocity rotation in rotary course, it is effectively reduced blade loss efficiency, improves the output of unit.

The operation principle of Magnus type wind energy conversion system: air flows through stair-stepping rotation plain vane with certain wind speed, produce Magnus lift, promotion blade rotates, producing moment under airflow function drives wind wheel to rotate, by a series of actuating device, mechanical energy is sent into TRT, for generating.

The work characteristics of Magnus type wind energy conversion system: Magnus type wind energy conversion system can start under any wind speed operating mode, simple in construction is easy to maintenance, and generating efficiency is high. And the easily fabricated processing of this wind energy conversion system, the evident characteristics such as center of gravity is relatively low, and safety is good, and operating cost is low, safeguards easily, noiselessness pollution. Magnus type wind energy conversion system can apply on trunnion axis and vertical axis, it is possible to carries out energy storage use at equipment such as wind-driven generator, high lift water pump, air compressors.

Positive progressive effect of the present utility model is in that: Magnus type wind energy conversion system of the present utility model, by being stair-stepping segmentation rotor by blade design, ensure that the bending stress suffered by blade extends to being evenly distributed by controlling the diameter of each cylindrical section, meet the requirement of strength of material; Ensure that each cylindrical section all runs with optimum operating mode by controlling the rotating speed of each cylindrical section, it is achieved wind energy conversion system is not only not impaired at atmospheric boundary layer output, has the effect promoted by a relatively large margin on the contrary.

In general, by the contemplated above technical scheme of this utility model compared with prior art, owing to pitch-variable system abandoned by wheel hub, drive motor is installed and is regulated the rotational velocity of blade by Helical gear Transmission, reach to control the control of wind energy conversion system output. Planet gear transmission system, as the actuating device between stair-stepping rotation plain vane, regulates the rotational velocity of centric leaf fragment, it is achieved differential rotates, simplifies the structure of unit and improve unit efficiency according to wind velocity gradient change.

Accompanying drawing explanation

Fig. 1 is Magnus type wind machine structure schematic diagram;

Fig. 2 is stair-stepping rotation plain vane internal drive mechanism;

Fig. 3 is driving mechanism in wheel hub;

Fig. 4 is atmospheric boundary layer wind speed profile;

Fig. 5 is wind-force acc power loss in atmospheric boundary layer;

In all of the figs, identical accompanying drawing labelling is used for representing identical element or structure, wherein: 1 TRT, 2 wheel hubs, 3 blades, 4 planet gear transmission systems, 5 pylons, 6 bases, 7 drive motors, 8 helical gears, 9 bonnets. 10 cylindrical internal gears, 11 sun gears), 12 feathering axis.

Detailed description of the invention

In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, this utility model is further elaborated. Should be appreciated that specific embodiment described herein is only in order to explain this utility model, be not used to limit this utility model. As long as just can be mutually combined additionally, technical characteristic involved in each embodiment of this utility model disclosed below does not constitute conflict each other.

Embodiment:

As shown in Figure 1, with the Magnus type wind energy conversion system of the plain vane of stepped rotation, the related facility such as including TRT (1), wheel hub (2), blade (3), pylon (5), basis (6). Wind wheel is made up of blade (3) and wheel hub (2). Blade (3) has aerodynamic profile, produces moment and drives wind wheel to rotate, torque be input in TRT (1) by wheel hub (2) under airflow function. Changes mechanical energy is become kinetic energy by TRT (1), and flows to electrical network. In order to arrangement of reinforcement is convenient, basis (6) is shaped as square. Pylon (5) is connected with basis (6), supports and is positioned at aerial wind generator system, bears wind generator system and runs the various load caused, and transmits these load to basis simultaneously, makes whole Wind turbine reliablely and stablely to run.

In conjunction with Fig. 1, Fig. 2 and Fig. 3 it can be seen that each section of shape of blade (3) to be cylinder, diameter stepped from blade root to leaf tip. By motor (7) driven vane rotation, the blade (3) of rotation produces Magnus lift under the effect of horizontal gas flow. Based on Wind turbine stability, lobe numbers is 5. There is bigger wind-force gradient based on atmospheric boundary layer, blade (3) is equidistantly divided into 15 centric leaf fragments, the stepped blade sections that namely radius gradually successively decreases. The rotating speed regulating planetary gear realizes the differential rotation of each centric leaf fragment. Fig. 4 is actuating device helical gear structure, and motor drives helical gear operating thus band moving vane rotates with certain speed. The mechanical energy that wind wheel rotates enters TRT (1) through feathering axis (12), is used for generating electricity.

In order to verify ladder Magnus type blade profile in this utility model implementation result in boundary region, to devise one group of ladder Magnus type blade profile in the present embodiment to contrast with tradition air-foil blade NACA4418, ladder Magnus type blade profile is designed with reference to NACA4418. Ladder Magnus type blade profile and NACA4418 are divided into 15 grades, and the lift design under uniform incoming flow wind speed of each section of Magnus type blade is identical with the lift of NACA4418, and gained Magnus type blade major parameter is as shown in table 1.

Table 1 ladder Magnus blade relevant parameter

Correlation computations is carried out according to infinitesimal momentum theory BEM, result of calculation shows: the traditional air-foil blade NACA4418 loss in efficiency in atmospheric boundary layer shear rigidity ratio (as shown in Figure 4) about 10%, and ladder Magnus shape blade reaches nearly 70% relative to the efficiency gain of tradition air-foil blade, in both power attenuations such as Fig. 5 shown in dash area. In the present embodiment, Computational fluid mechanics numerical simulation is adopted to be analyzed also obtaining close result. Therefore, comparing traditional blades, ladder Magnus shape blade has the advantage improving output in atmospheric boundary layer.

Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all any amendment, equivalent replacement and improvement etc. made within spirit of the present utility model and principle, should be included within protection domain of the present utility model.

Claims

1. a ladder Magnus type wind blade, it is characterised in that described blade is stepped cylindrical shape, is divided into some cylindrical sections, each section of body diameter diminishes piecemeal from root of blade to blade end;

Described cylindrical section includes circular internal gear, and its inner chamber is equipped with planetary gear system (4), and described planetary gear system (4) inner chamber is provided with central gear between two parties, and each cylindrical section central gear is coaxial; Each central gear and engages with upper planetary gear by three with gear ring, and for ring gear against rotation is passed to central gear, and the differential realizing each cylindrical section rotates.

2. the Magnus type wind energy conversion system that a blade described in claim 1 is constituted, including pylon (5) and TRT (1), it is characterized in that: include three the above blades, each blade is connected by root cylindrical section and wheel hub are fixing, relative to the circularly symmetric distribution of hub centre; Described hub interior is provided with motor (7), for the circular internal gear rotation of driven vane root cylindrical section, drives the rotation of other cylindrical section;

During each blade working, rotate under the drive of wind-force, convert wind energy into mechanical energy, send into TRT.

3. Magnus type wind energy conversion system according to claim 2, it is characterised in that: between motor (7) and root cylindrical section, it is provided with helical gear (8), for realizing the power transmission between motor and cylindrical section circle internal gear.

4. the Magnus type wind energy conversion system according to Claims 2 or 3, it is characterised in that: it includes five blades waiting circle angular distribution.

5. the Magnus type wind energy conversion system according to Claims 2 or 3, it is characterised in that: in each cylindrical section inner planet gear system, the gear ratio of gear ring and sun gear, planetary gear designs according to actual condition.