KR20110051397A - Turbine rotor for vertical wind turbine and vertical wind turbine system - Google Patents

Turbine rotor for vertical wind turbine and vertical wind turbine system Download PDF

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Publication number
KR20110051397A
KR20110051397A KR1020090107949A KR20090107949A KR20110051397A KR 20110051397 A KR20110051397 A KR 20110051397A KR 1020090107949 A KR1020090107949 A KR 1020090107949A KR 20090107949 A KR20090107949 A KR 20090107949A KR 20110051397 A KR20110051397 A KR 20110051397A
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South Korea
Prior art keywords
blade
vertical axis
shaft
bearing
vertical
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KR1020090107949A
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Korean (ko)
Inventor
이승배
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주식회사 에어로네트
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Priority to KR1020090107949A priority Critical patent/KR20110051397A/en
Publication of KR20110051397A publication Critical patent/KR20110051397A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D15/00—Transmission of mechanical power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor 
    • F03D3/06—Rotors
    • F03D3/061—Rotors characterised by their aerodynamic shape, e.g. aerofoil profiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/70—Bearing or lubricating arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/80—Arrangement of components within nacelles or towers
    • F03D80/88—Arrangement of components within nacelles or towers of mechanical components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/20—Rotors
    • F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/50—Bearings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Wind Motors (AREA)

Abstract

PURPOSE: A turbine rotor for a vertical wind turbine and a vertical wind turbine system are provided to prevent the reduction of efficiency caused by a difference between a wind direction and the incidence angle of blades. CONSTITUTION: A turbine rotor for a vertical wind turbine comprises a rotary shaft(110) and a plurality of blades(120). The blades have entry and exit sides with asymmetrical angles. According to the blades, the ratio between cord length and pitch ranges from 0.3 to 0.6, the ratio between inner diameter and outer diameter ranges from 0.8 to 1.1, and the ratio between cord length and outer diameter ranges from 0.6 to 1.3.

Description

Turbine Rotor for Vertical Wind Turbine and Vertical Wind Turbine System

The present invention relates to a wind turbine generator for generating power using wind energy, and a vertical axis wind power generation system using the turbine rotor. In particular, the rotating shaft is installed in a vertical direction from the ground to convert natural wind energy into mechanical energy. It relates to a vertical axis wind power generation system to convert the power generation.

Recently, as environmental issues are highlighted around the world and the energy crisis is faced, efforts are being made to develop various alternative energy sources. Among them, wind power is clean energy that is not depleted and is attracting attention as the energy source with the highest growth rate among various alternative energy.

Wind power generation systems generate electricity by converting natural wind energy into mechanical energy. Such a wind power generation system is installed in a place where there is a lot of wind to induce the wind as well as to rotate the turbine or rotor by the force of the introduced wind to generate power and electricity.

These wind power generation systems are largely classified into a horizontal axis method and a vertical axis method, and there is a hybrid method combining the two methods.

In general, the vertical axis method is about half the efficiency of the horizontal axis method, but the rotor rotation speed is relatively low, so there is little noise and almost no vibration, so it can be installed in public facilities such as rooftops, schools, hospitals, etc. Long-term use and power generation by blade manufacturing and blade has been used mainly in independent small wind power generation system.

U.S. Patent Application Publication No. 2008/0095608 discloses a vertical shaft generator having an articulated rotor, and discloses an invention in which the inclination of the blade is changed from a segmented center according to a change in wind speed.

US Patent Publication No. 2007/0297903 shows a vertical axis wind power generator having an airfoil assembly formed in multiple stages.

In addition, US Patent Application Publication No. 2007/0224029 discloses an invention in which a stepped groove is formed at a pressure surface of a lower surface of an airfoil in order to solve a self-starting problem of a H type vertical wind turbine.

Korean Patent No. 10-0490683 shows a vertical axis wind power generator for automatically adjusting the pitch of the airfoil blades according to the wind direction.

And in Korean Patent Nos. 10-0752755 and 10-0616109 vertical axis wind power, characterized in that a perforated hole or a streamlined projection is provided in front of the semi-circular arc impulse type blades connecting the S-type rear end of the wing of the semi-circular arc The generator is shown.

However, in general, a vertical axis H type vertical wind turbine (see FIG. 1) having a symmetrical airfoil shape, as shown in FIG. 2, which is a curve representing a change in lift force of an airfoil according to rotation of a conventional H type vertical axis wind turbine, Due to the symmetrical variation of the lift coefficient due to the change in the angle of incidence between the wind direction and the wing, there is a disadvantage that the final torque is low and the efficiency is lowered.

The general form of the impulse turbine, called drag, not lift, is shown in FIG. 3.

Such an impulse turbine has a low efficiency of less than 10% and is used for measuring the wind speed of a cup rather than a wind turbine.

The output of a conventional symmetrical impulse vertical axis wind turbine is calculated as shown in equation (1) from the speed triangle, as shown in FIG.

Figure 112009068894963-PAT00002
Formula (1)

Where the rotational component of absolute speed (C 2 ) at the rotor exit

Figure 112009068894963-PAT00003
Has a value of the sound becomes larger (that is, rotation in the opposite direction) at the same time receive a significant amount of power transmission because the size one would need to reduce the U 2 To do this (
Figure 112009068894963-PAT00004
), In this case, the rotor inner diameter of the cup is reduced, the rotor size increases, there is a disadvantage that the manufacturing cost increases.

22A shows a coupling structure in which a rotor rotation shaft rotates through an outer circumferential bearing installed on an outer surface of the fixed vertical shaft about a fixed vertical shaft for supporting a conventional H type rotor.

Such a coupling structure has a disadvantage in that it is difficult to connect the rotor rotation shaft with a gear shaft or a generator shaft.

In order to solve the difficulty of connecting the rotor shaft to the gear shaft or generator shaft, the rotor shaft is coupled and rotated through the upper and lower outer bearings installed on the inner side of the fixed vertical shaft, and the rotor shaft is directly connected to the gearbox or generator. It has been disclosed.

This structure makes it easy to connect the rotor rotation shaft with the gear shaft or the generator shaft. However, in order to support the rotor from the load acting on the rotor due to the overwind speed and the like, as shown in FIG. It is disadvantageous to install the same support, or to install a structure supported by a bearing on the top of the rotor.

The present invention has been made to solve the above-mentioned conventional problems, the final rotational force is lowered by the symmetrical variation of the lift coefficient due to the change in the angle of incidence between the wind direction and the wing, which is inherent in the vertical rotor wind turbine rotor It is an object of the present invention to provide a vertical axis wind power generation system including a generator for connecting to a gear that rotates in conjunction with the rotation of the vertical axis wind turbine turbine, which can overcome the disadvantages of deterioration. .

In addition, in the combination of the vertical shaft and the rotary shaft, by installing the rotary shaft inside the vertical shaft, not only can be directly coupled to the gearbox or generator, but also vertical shaft wind power having a coupling structure that does not need to install any support or support structure other than the vertical shaft The purpose is to provide a power generation system.

Vertical axis wind turbine generator of the present invention for achieving the above object,

It includes a rotating shaft and a plurality of blades, the blade is formed in the inlet or outlet of the inlet or outlet shape asymmetrically long in the downstream direction, the blade length of the rotor blades (C) and pitch ratio (P) of value

Figure 112009068894963-PAT00005
Is between 0.3 and 0.6, the ratio of blade inner diameter to outer diameter
Figure 112009068894963-PAT00006
Is between 0.8 and 1.1, with cord length (C) and blade outer diameter (
Figure 112009068894963-PAT00007
Rain of)
Figure 112009068894963-PAT00008
Is between 0.6 and 1.3.

Vertical axis wind power generation system of the present invention for achieving the above object,

A rotating shaft and a plurality of blades,

The blade is formed asymmetrically the inlet or outlet angle of the inlet or outlet shape in the downstream direction, the value of the blade cord length (C) and pitch ratio (P) of the rotor blades

Figure 112009068894963-PAT00009
Is between 0.3 and 0.6, the ratio of blade inner diameter to outer diameter
Figure 112009068894963-PAT00010
Is between 0.8 and 1.1, with cord length (C) and blade outer diameter (
Figure 112009068894963-PAT00011
Rain of)
Figure 112009068894963-PAT00012
Turbine rotor for vertical axis wind power generation, characterized in that between 0.6 and 1.3;

Vertical axis;

Including a bearing located inside the vertical axis,

A vertical axis is coupled to the outer diameter of the bearing, and a rotation axis is coupled to the inner diameter of the bearing.

In addition, the vertical axis wind power generation system of the present invention for achieving the above object,

A rotating shaft and a plurality of blades,

The blade is formed asymmetrically the inlet or outlet angle of the inlet or outlet shape in the downstream direction, the value of the blade cord length (C) and pitch ratio (P) of the rotor blades

Figure 112009068894963-PAT00013
Is between 0.3 and 0.6, the ratio of blade inner diameter to outer diameter
Figure 112009068894963-PAT00014
Is between 0.8 and 1.1, with cord length (C) and blade outer diameter (
Figure 112009068894963-PAT00015
Rain of)
Figure 112009068894963-PAT00016
Turbine rotor for vertical axis wind power generation, characterized in that between 0.6 and 1.3;

Vertical axis;

It characterized in that it comprises a first bearing coupled to the inner diameter of the vertical axis, and a second bearing coupled to the outer diameter of the vertical axis.

In addition, the vertical axis wind power generation system of the present invention for achieving the above object,

A rotating shaft and a plurality of blades,

The blade is formed asymmetrically the inlet or outlet angle of the inlet or outlet shape in the downstream direction, the value of the blade cord length (C) and pitch ratio (P) of the rotor blades

Figure 112009068894963-PAT00017
Is between 0.3 and 0.6, the ratio of blade inner diameter to outer diameter
Figure 112009068894963-PAT00018
Is between 0.8 and 1.1, with cord length (C) and blade outer diameter (
Figure 112009068894963-PAT00019
Rain of)
Figure 112009068894963-PAT00020
Turbine rotor for vertical axis wind power generation, characterized in that between 0.6 and 1.3;

Vertical axis;

It includes a rotation shaft and a bearing located on the outer diameter of the vertical axis, characterized in that it comprises a girth gear installed on the outer diameter of the rotary shaft, a pinion gear connected to the girth gear, a gear box or a generator connected to the pinion gear.

The present invention has the following advantages.

(1) In the case of turbine rotors for vertical axis wind power generation, turbine rotors whose asymmetrical inlet or outlet angles are varied in order to increase power transmission without increasing the outer diameter or decreasing the inner diameter of the rotor. Or, the outlet shape is formed long in the downstream direction, so that the flow is advantageous to flow along the blade without departure angle, and the direction of rotation of positive inlet absolute speed or negative outlet absolute speed without increasing rotor outer diameter or decreasing rotor inner diameter (

Figure 112009068894963-PAT00021
), The absolute value of) increases dramatically, and the output increases, so that the electrical output per unit incident area (Watts / m 2 ) is more than 300 at the rated wind speed.

 (2) Changes in the angle of incidence between the wind direction and the wing, which is an inherent problem of H-type turbines that do not passively or actively steer, unlike horizontal generators that need to steer in accordance with wind direction or vertical shafts that need to steer guide vanes. Due to the symmetrical fluctuations in the lift coefficient, the final torque is lowered, which can overcome the disadvantage of lowering efficiency.

(3) By installing the rotating shaft of the turbine rotor inside the fixed vertical shaft, it is possible not only to connect or fasten the gearbox or generator directly, but also to install the support / support structure other than the vertical shaft. It is possible to reduce the cost of the wind power generation system itself.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment according to the present invention will be described in detail.

First, the vertical turbine wind turbine rotor 100 according to the present invention will be described in detail.

The turbine rotor 100 for vertical axis wind power generation includes a rotation shaft 110 and a blade 120.

A frame unit 130 including a first frame 131 and a second frame 150 is connected to connect the rotating shaft 100 and the blade 120.

First, the role of the blade 120 converts the force of the wind into the rotational force of the turbine rotor 100, thereby enabling the generation of wind power.

A plurality of such blades 120 are generally formed in the turbine rotor 100.

In a vertical axis wind power generation system, the blades are formed parallel to the rotational axis. In contrast, in a horizontal axis wind power generation system, the blades have an angle perpendicular to or close to the rotation axis.

Hereinafter, the shape of the blade 120 will be described in detail.

When looking down the turbine rotor 100 from above, the shape of the AA cross section of the blade 120 has an asymmetrical shape around an arc of a trajectory formed when the blade 120 rotates by wind. .

The blade 120 is formed with an outer surface 121 and an inner surface 122, an upper surface 124 and a lower surface (not shown), the space 123 is formed on the inner surface 122 of the blade, To generate drag.

First, the blade outer surface 121 has a curved shape.

The blade outer surface 121 is coupled to the second frame 150 for the connection of the blade 120 and the rotating shaft 110, the coupling hole for coupling with the second frame 150 (not shown) ) Is formed.

The second frame 150 and the blade outer surface 121 is coupled by a bolt 157.

A detailed description of the structure of the second frame 150 will be described later.

The blade upper surface 124 has a flat shape.

The blade upper surface 124 is coupled to the first frame 131 for the connection between the blade 120 and the rotating shaft 110, the coupling hole for coupling with the first frame 131 (not shown) Is formed.

The first frame 131 and the blade upper surface 124 are also coupled by a bolt 145.

A detailed description of the structure of the first frame 131 will be described later.

The blade inner surface 122 also has a curved shape similar to the outer surface 121, and the blade inner surface 122 has a reinforcing member 126 having the same cross section as that of the blade 120. It is formed along the AA cross section of the side surface 122.

The blade reinforcement member 126 serves to reinforce the durability and strength of the blade 120 when a drag acts on the blade 120 by wind, the position where the blade reinforcement member 126 is formed and The number formed may vary depending on the size / length of the blade 120 and the weather conditions.

Outer diameter of the turbine rotor (100)

Figure 112009068894963-PAT00022
) Or inside diameter (
Figure 112009068894963-PAT00023
In order to increase the power transmission to the gearbox 500 or the generator 600 without reducing the need for a small size, a method of changing the inlet or outlet angle of the blade 120 is required and is asymmetric as shown in FIGS. 4A and 4B. The design of a conventional turbine rotor is essential.

4a and 4b has an inlet or outlet shape extending in the downstream direction, so that the flow is advantageously flowing along the blade without a departure angle, and also the outer diameter of the turbine rotor 100 (

Figure 112009068894963-PAT00024
Inlet angle shown in Figure 5 without increasing the
Figure 112009068894963-PAT00025
Exit angle
Figure 112009068894963-PAT00026
Rotation direction component of positive inlet absolute speed
Figure 112009068894963-PAT00027
) Or rotational direction component of negative outlet absolute velocity (
Figure 112009068894963-PAT00028
The magnitude of the absolute value of) increases dramatically, causing the output to increase.

As described above, the turbine rotor 100 having an asymmetrical shape has to increase the design variable, unlike the conventional symmetrical impulse turbine rotor, so that the optimum design must be performed.

In the present invention, the wing cord length, which is a design variable of the asymmetric impulse turbine, for the purpose of increasing the efficiency of the turbine rotor through such an increase in output.

Figure 112009068894963-PAT00029
Wing cord to pitch ratio
Figure 112009068894963-PAT00030
Wing intake radius
Figure 112009068894963-PAT00031
Wing exit radius
Figure 112009068894963-PAT00032
Wing entrance angle
Figure 112009068894963-PAT00033
Wing exit angle
Figure 112009068894963-PAT00034
Adjust the value so that the optimal value is the same.

The efficiency of the case where the blade 120 of the vertical axis wind turbine turbine according to the present invention is tested for three shape variables is referred to FIG. 7.

Hereinafter, the frame unit 130 connecting the blade 120 and the rotation shaft 110 will be described in detail.

As described above, a frame portion 130 for connecting the blade 120 and the rotating shaft 110 is formed, the frame portion 130 is the first frame 131 and the second frame 150 It is made to include.

When the turbine frame 100 is viewed from the front, the first frame 131 may include a first support 133 of the first frame extending from the outer diameter of the rotation shaft 110 to the left and right and the first frame 133 of the first frame. It is formed from the other end 135 of the first support and includes a second support 140 of the first frame coupled to the blade upper surface 124.

One end 134 of the first support of the first frame is connected to the outer diameter of the coupling ring 136 for coupling with the rotary shaft 110.

Since the inner diameter of the coupling ring 136 is fixedly supported in contact with the outer diameter 111 of the rotation shaft, the coupling ring 136 is fixedly supported on the rotation shaft 110.

The shape of the second support 140 of the first frame, which is formed from the other end 135 of the first support of the first frame and is formed to be parallel to the upper surface of the blade 124, is as follows.

When the turbine rotor 100 is viewed from top to bottom, the second support 140 of the first frame has a substantially triangular shape, and a center space 142 is formed.

A coupling plate 143 is formed on the lower surface 141 of the second support of the first frame to couple the second support 140 of the first frame to the blade upper surface 124.

A coupling hole (not shown) for coupling with the blade 120 is formed in the coupling plate 143 between the second support 140 and the blade upper surface 124 of the first frame, and a bolt ( By inserting 145, the blade 120 and the second support 140 of the first frame is fixedly coupled.

Hereinafter, the second frame 150 will be described in detail.

When the turbine rotor 100 is viewed from the front, the second frame 150 has a shape extending in left and right downwards.

One end 151 of the second frame is connected to the outer diameter of the coupling ring 153 of the second frame.

The inner diameter of the coupling ring 153 of the second frame is in contact with the outer diameter 111 of the rotation shaft, the coupling ring 153 is fixed to the rotation shaft 110, as a result the second frame 150 It is fixed to the rotating shaft 110.

A coupling plate 156 is formed at the other end 152 of the second frame to couple the second frame 150 and the blade outer surface 124.

A coupling hole (not shown) is formed in the coupling plate 156 between the second frame 150 and the blade outer surface 124, and by inserting a bolt 159 into the coupling hole, the blade 120 and The second frame 150 is fixedly coupled.

The shape of the coupling plate 156 between the second frame 150 and the blade outer surface 124 may vary depending on the shape of the blade outer surface 124. In the present invention, the overall shape is rectangular.

In order to firmly couple the second frame 150 and the blade outer surface 124, a curved surface corresponding to the blade outer surface 124 is formed on a side of the coupling plate 156 of the blade outer surface 124. It is preferable to form.

As such, the frame unit 130 may be firmly coupled to the blade 120 and the rotation shaft 110.

Hereinafter, a coupling structure of the rotation shaft 110 and the vertical shaft 160 will be described in detail with reference to the accompanying drawings.

The coupling structure of the rotary shaft 110 and the vertical shaft 160 according to a preferred embodiment of the present invention is characterized in that the vertical axis is coupled to the bearing, the outer diameter of the bearing, the rotation axis is coupled to the inner diameter of the bearing, respectively.

The vertical shaft 160 not only firmly supports the rotation shaft 110, but also serves to enable smooth rotation, and is installed in the tower 400 in which the gear box 500 or the generator 600 is supported and fixed. do.

The vertical shaft 160 is a hollow shaft having a space, and a first bearing 165 is coupled to an upper portion of the vertical shaft, and a second bearing 171 is coupled to a lower end 163 of the vertical shaft.

The lower portion of the rotating shaft 110 is coupled to the third bearing 175 for supporting the axial load for transmitting the rotational force of the rotating shaft 110 is rotated by the wind to the gear box 500 or the generator 600.

First, a coupling structure of the first bearing ring 165 coupled to the vertical shaft 160 and the upper portion of the vertical shaft 160 will be described in detail.

The first bearing 165 supports the rotating shaft 110 that is rotated by the wind and enables smooth rotation.

The first bearing 165 includes an inner ring 166 and an outer ring 167 disposed outside the inner ring.

A groove is formed in the outer side of the inner ring 166 and the outer ring 167, and a ball 168 is disposed between the inner ring 166 and the outer ring 167.

The inner ring 166 of the first bearing is fixed in contact with the outer diameter 111 of the rotating shaft 110, and the outer ring 167 of the first bearing is fixed in contact with the inner diameter 162 of the vertical shaft 160.

The second bearing 171 coupled to the lower portion of the vertical shaft 160 and the vertical shaft 160 also includes an inner ring 172 and an outer ring 173 disposed outside the inner ring.

A groove is formed in the outer side of the inner ring 172 and the inner ring 173, and a ball 174 is disposed between the inner ring 172 and the outer ring 173.

Hereinafter, the third bearing 175 coupled to the lower portion of the rotating shaft will be described in detail.

A lower shaft portion 115 having a smaller diameter than the outer diameter 111 of the rotating shaft may be formed at the lower portion of the rotating shaft so as to connect the shaft with the gear 500 or the generator 600.

The rotating shaft small diameter portion 115 has a shape protruding downward for the shaft connection with the gear 500 or the generator 600.

A jaw 116 is formed where the outer diameter 111 of the rotating shaft and the small diameter portion 115 of the rotating shaft are started, and the third bearing 175 is fixedly coupled to the jaw 116.

The third bearing 175 serves to support the celebration, and includes an upper wheel 176 and a lower wheel 177 disposed below the upper wheel.

A groove is formed in a lower portion of the upper wheel 176 and an upper portion of the lower wheel 177, and a ball 174 is disposed between the upper wheel 176 and the lower wheel 177.

The upper wheel 176 of the third bearing is fixed in contact with the jaw 16 of the outer diameter 111 of the rotating shaft and the small diameter portion 115 of the rotating shaft.

The lower wheel 177 of the third bearing is fixed in contact with the lower end 163 of the vertical shaft.

By the coupling structure of the vertical shaft 160 and the rotating shaft 110, the rotating shaft 110 located in the hollow portion 161 of the vertical shaft to be fixed is installed by the first bearing 165 and the second bearing 171. In addition, smooth rotation and robust support are possible, and the rotational force of the rotation shaft 110 is smoothly transmitted to the gear 500 or the generator 600 by the third bearing 175.

 In addition, it is not necessary to install a separate support shaft / support other than the vertical shaft 160 fixed to support the rotating shaft 110.

Hereinafter, a coupling structure of the vertical shaft 210 and the rotating shaft 260 according to another preferred embodiment of the present invention will be described in detail with reference to the drawings.

Since the shape of the blade 120 of the turbine rotor is as described above, a detailed description thereof will be omitted.

First, the frame unit 230 that couples the blade 120 and the rotation shaft 210 will be described in detail with reference to the accompanying drawings.

The frame unit 230 includes a first frame 231 and a second frame 240.

The first frame 231 serves to connect the blade 120 and the rotating shaft 210, and consists of a support 232 and the coupling plate 235.

One end 233 and the other end 234 of the support 232 of the first frame is formed, respectively, one end 233 of the support of the first frame is coupled to the upper portion of the rotation shaft 210.

The other end 234 of the support of the first frame is connected to the coupling plate 235, and the structure of the coupling plate 235 and the coupling hole formed in the coupling plate 235 as described above, so that here Detailed description will be omitted.

Hereinafter, the second frame 240 will be described in detail.

The second frame 240 connects the blades 120, serves to support the blades 120 with respect to the vertical axis 260, and includes a support 241 and a coupling plate 250.

A first end 242 and a second end 243 are respectively formed on the support 241 of the second frame, and the second end 243 of the support of the second frame is connected to the coupling plate 250. .

The first end 242 of the support of the second frame is supported by the second bearing 274 and the vertical axis 260.

The shape of the first end 242 of the support of the second frame has a 'b' shape in which the jaw 243 is formed inside, and is connected to the second end 249 of the support of the second frame.

The inner jaw 243 of the first end of the support of the second frame has a first surface 244 parallel to the vertical axis 260 (vertical surface) and a second surface 245 perpendicular to the first surface 245. ), A third surface 246 perpendicular to the second surface, a fourth surface 247 perpendicular to the third surface, and a fifth surface 248 perpendicular to the fourth surface. Vertical plane).

The first surface 244 is slightly spaced apart from the outer diameters d3 and 261 of the vertical axis.

The jaw 243 formed by the fourth surface 247 and the fifth surface 248 is supported and coupled by an upper surface of the second bearing 274.

Therefore, the first end 242 of the support of the second frame is slightly spaced apart from the vertical axis 260, and has a structure that is supported and coupled by an upper surface of the second bearing 274, the second The second end 249 of the support of the frame has a structure that is connected to the blade 120 through the coupling plate 250.

When a drag acts by the wind blowing on the blade 120 of the turbine rotor, when the turbine rotor 100 rotates, the support 232 of the first frame is coupled to the rotating shaft 260, the first Since the support 241 of the two frames is supported and coupled with the second bearing 274 coupled to the outer diameters d3 and 261 of the vertical axis, the blade 120 can be smoothly rotated and firmly supported.

Hereinafter, the shapes of the rotating shaft 210 and the vertical shaft 260 will be described in detail with reference to the accompanying drawings.

The rotating shaft 210 includes large diameter portions d4 and 211 of the rotating shaft, small diameter portions d1 and 212, a coupling portion 213 of the rotating shaft and the frame portion, and an end portion 214 of the rotating shaft.

First, since the small diameter parts (d1, 212) and the large diameter parts (d4, 211) of the rotating shaft are as described above, detailed descriptions thereof will be omitted, and the coupling part 213 of the rotating shaft and the frame part and the ends of the rotating shaft will be omitted. It demonstrates in detail centering on (214).

The coupling part 213 of the rotating shaft and the frame part has an inner diameter and an outer diameter.

The inner diameter of the coupling portion 213 of the rotating shaft and the frame portion has a larger diameter than the large diameter portions d4 and 211 of the rotating shaft, and has a larger diameter than the outer diameters d3 and 261 of the vertical shaft, which will be described later.

Since the inner diameter of the coupling shaft 213 of the rotating shaft and the frame portion has a diameter larger than the outer diameters d3 and 261 of the vertical shaft, the vertical shaft 260 may be inserted into the rotating shaft 210.

In order to prevent interference between the outer diameters d3 and 261 of the vertical axis and the inner diameter of the coupling part 213 of the rotating shaft and the frame part, the inner diameter of the coupling part 213 of the rotating shaft and the frame part is the outer diameter d3 and 261 of the vertical axis. It is preferable to make it slightly larger than).

The frame portion 230, more specifically, one end 233 of the first frame is coupled to the outer diameter of the coupling shaft 213 of the rotating shaft and the frame portion.

An end portion 214 of the rotating shaft is formed between the coupling portion 213 of the rotating shaft and the frame portion and the large diameter portions d4 and 211 of the rotating shaft.

The end portion 214 of the rotating shaft serves to support the upper surface of the inner ring of the first bearing 273 coupled with the inner diameters d2 and 266 of the vertical shaft.

The first bearing 273 coupled to the inner diameters d2 and 266 of the vertical shaft includes an inner ring and an outer ring disposed outside the inner ring.

Grooves are formed at the outer side of the inner ring and the inner side of the outer ring, and a ball is disposed between the inner ring and the outer ring.

As described above, the upper surface of the inner ring of the first bearing 273 is supported by the end portion 214 of the rotating shaft, the side of the inner ring is a large diameter portion (d4, 211) of the rotating shaft, the side of the outer ring is a vertical axis In combination with the inner diameter (d2, 266) of, it is firmly supported.

Hereinafter, the coupling between the inner diameters d2 and 266 of the vertical axis and the side surface (outer diameter) of the outer ring of the first bearing will be described in detail.

Inner diameters d2 and 266 of the vertical axis include a first surface 268 (vertical surface), a second surface perpendicular to the first surface 269 (horizontal surface), a third surface perpendicular to the second surface 270 (vertical surface), and An inner diameter end portion 267 of the vertical axis including a fourth surface 271 (horizontal surface) perpendicular to three surfaces is formed.

Sides of the outer ring of the first bearing 273 and a portion of the lower surface of the first surface 268 and the second surface 269 are coupled to each other.

Coupling of the second bearing 274 and the outer diameters d3 and 261 of the vertical axis will be described in detail with reference to the drawings.

As described above, the second bearing 274 coupled with the outer diameters d3 and 261 of the vertical axis includes an inner ring and an outer ring disposed outside the inner ring.

Grooves are formed at the outer side of the inner ring and the inner side of the outer ring, and a ball is disposed between the inner ring and the outer ring.

End portions 262 formed outward from outer diameters d3 and 261 of the vertical axis are formed.

The outer diameter end of the vertical axis includes a first surface 263 (horizontal surface), a second surface 264 (vertical surface), and a third surface 265 (inclined surface).

Side surfaces of the inner ring of the second bearing 274 contact the outer diameters d3 and 261 of the vertical axis, and the lower surface of the inner ring is supported by the first surface 263 of the outer diameter end of the vertical axis.

For reference, the third bearing 275 also includes an inner ring and an outer ring disposed outside the inner ring.

Grooves are formed at the outer side of the inner ring and the inner side of the outer ring, and a ball is disposed between the inner ring and the outer ring.

Hereinafter, a vertical axis wind power generation system according to the present invention will be described in detail with reference to the drawings.

First, the coupling structure of the vertical shaft 360 and the rotary shaft 310 and the rotational force of the rotary shaft 310 that is rotated by the wind will be described in detail with reference to the transmission to the gearbox 500 or the generator 600, and the blade ( 120 and the coupling of the rotary shaft 310 will be described briefly.

The outer surface 121 of the blade 120 is coupled to one side of the frame portion 340, the other side of the frame portion 340 is coupled to the rotating shaft 310 to rotate.

Hereinafter, the coupling structure of the vertical axis 360 and the rotation axis 310 will be described in detail with reference to the accompanying drawings.

The vertical shaft 360 is inserted into the rotating shaft hollow 311.

In order to smoothly rotate and support the rotary shaft 310 in relation to the vertical shaft 360, the rotary shaft upper assembly 320 is installed.

The upper rotary shaft assembly 320 is inserted and coupled in a manner to fit the rotary shaft hollow portion 311 through the upper portion of the rotary shaft.

Inside the rotary shaft upper assembly 320, a hole is formed so that the first bearing 373 and the vertical shaft upper assembly 330 which will be described later can be inserted and coupled.

The side surface 323 of the upper rotary shaft assembly forming the outer diameter of the upper rotary shaft 320 is in contact with the inner diameter of the rotary shaft 310.

An end portion 321 is formed outward from the side surface 323 of the rotary shaft upper assembly.

The end 321, more precisely, the lower surface 322 of the end is in contact with the upper surface of the rotation shaft.

Hereinafter, the coupling between the vertical shaft 360 and the rotary shaft upper assembly 320 will be described in detail with reference to the accompanying drawings.

The vertical axis 360 is formed upward from the tower 400, and a hollow part is formed therein.

The upper vertical coupling unit 330 is inserted into and coupled to the upper portion of the vertical shaft 360.

The shape of the vertical axis upper coupling 330 is as follows.

The diameter of the lower portion of the vertical axis upper coupling 330 is in contact with the inner diameter (d4,369) of the vertical axis, so that the vertical axis upper coupling 330 is fixedly supported relative to the vertical axis (360).

In addition, the vertical axis upper assembly 330 is more firmly fixed to the vertical axis 360 by the end portion 336 formed outward from the side surface 337 forming the diameter of the lower portion of the vertical axis upper assembly 330. do.

The end portion 336 includes a first surface (horizontal surface 333), a second surface perpendicular to the first surface (vertical surface 334), and a third surface perpendicular to the second surface (horizontal surface 335). Is done.

The third surface (horizontal surface) 335 of the end is in contact with the upper surface of the vertical axis 360, so that the vertical axis upper assembly 330 is fixedly supported relative to the vertical axis 360.

The first bearing 373 and the second bearing 374 also include an inner ring and an outer ring, and grooves are formed in the outer ring and the outer ring of the inner ring, and a ball is disposed between the inner ring and the outer ring.

The upper vertical coupling body 330 is coupled to the inner ring of the first bearing 373. This is referred to as a coupling surface 332 between the vertical axis upper coupling 330 and the first bearing 373.

The vertical shaft upper assembly 330 is firmly supported by an inner ring of the first bearing 373 and inner diameters d4 and 369 of the vertical shaft and an upper surface of the vertical shaft.

Hereinafter, the first bearing 373 located between the vertical shaft upper assembly 330 and the rotary shaft upper assembly 320 will be described in detail.

As described above, a hole is formed in the upper rotating shaft assembly 320.

The first bearing 373 is positioned through a hole or a space formed in the rotary shaft upper assembly 320.

The outer ring of the first bearing 373 is in contact with the inner diameter of the rotary shaft upper coupling 320.

The inner ring of the first bearing 373 forms a coupling surface 332 with the vertical shaft upper coupling 330.

Hereinafter, the second bearing 374 and the third bearing positioned between the lower portion of the rotating shaft 310 and the lower portion of the vertical shaft 360 will be described in detail.

Since the structure and shape of the second bearing 374 have been described above, a detailed description thereof will be omitted.

The outer ring of the second bearing 374 is supported by a jaw formed in the inner diameter of the rotating shaft, the inner ring is supported by the vertical shaft 360.

A third bearing 375 is positioned on the bottom surface of the second bearing 374, and the third bearing 375 preferably uses a tapered bearing that supports both axial and radial loads.

The third bearing 375 includes an inner ring 378 and an outer ring 376 disposed outside the inner ring.

Grooves are formed in the outer side of the inner ring 378 and the outer ring 376, and a roller 377 is disposed between the inner ring 378 and the outer ring 376.

As the upper surface of the outer ring 376 of the third bearing and the lower surface of the second bearing 374 are in contact with each other, the second bearing 374 is more firmly supported and fixed.

As the lower surface of the third bearing 375 comes into contact with the lower end of the rotating shaft 310, it is firmly supported and fixed.

An end 380 is formed below the rotation shaft 310.

The end portion 380 includes a first surface (horizontal plane 381), a second surface perpendicular to the first surface (vertical surface 382), and a third surface perpendicular to the second surface (horizontal surface 383).

Gus gear 390 to be described later is coupled to the first surface (horizontal surface, 381) of the end portion 380.

As the girth gear 390, more specifically, the lower surface 391 of the girth gear engages with the first surface (horizontal surface, 381) of the end 380, in conjunction with the rotation of the rotary shaft 310, The gus gear 390 is also rotated.

The pinion gear 392 is connected to the other than the girth gear 390 to be adjacent.

The pinion gear 392 received the rotational force, by rotating the gearbox 500 or the generator 600 connected to the pinion gear 392, it is possible to generate electricity by the wind.

In addition, the electric system of the wind power generation system of the present invention will be described by dividing the grid-connected type and independent power type: the electric control system configuration of the grid-connected wind turbine is the same as FIG. 21, the generator is a permanent magnet synchronous generator 700 It is a power generation system capable of outputting any change in the rotational speed of the turbine according to the change of wind speed by using, and the permanent magnet type synchronous generator 700 and the rear stage control system are manually inputted and blocked by the circuit breaker 710. It is designed to work safely during system installation and maintenance, and it can prevent damage to the electric control system due to overload by automatic shut-off when control failure occurs in over wind speed.

The three-phase AC power generated by the permanent magnet synchronous generator 700 is converted into DC power by the full-wave rectifier diode module 721 built in the dump rod 720 and input to the boost type converter 730. The system is protected by a dump load composed of a switching element 722 and a resistor 723 to allow a normal operation without shutting down the system for a certain period of time when the system is in a no-load state or an overload caused by an excessive wind speed. The step-up converter has a function of controlling the inverter to a DC voltage that can be controlled in order to generate a designed electrical output in the starting wind speed in the end wind speed range, which is an energy storage element of the inductor 731 and the switching element 732. By appropriate control is possible.

Diode 733 is for forward control. The DC power boosted to the proper value by the boost converter 730 is input to the grid-connected inverter 740, and the capacitor 741 is used to filter out the ripple of the DC power and thereby filtered.

The constant DC power supply is a power source having a voltage and frequency synchronized with the system by the switching of the IGBT module 742, and the sinusoidal AC power source with little harmonic is connected to the system by the output filter 743.

A wiring breaker 750 is used between the inverter and the grid in order to facilitate the safe connection of the wind turbine electrical control system and the grid, inspection in case of failure, and circuit disconnection.

In addition, the configuration of the electric control system of the single-powered wind generator is the same as that of FIG. 22, and the generator uses the permanent magnet synchronous generator 800 as the grid-connected type, and the circuit breaker 810 has the same configuration.

The three-phase AC power generated by the permanent magnet synchronous generator 800 is input to the boost type converter 820 to be converted into DC power by the full-wave rectifier diode module 821, and the inductor 822 and the switching element 823 Appropriate control enables desired DC voltage control and is coupled to the battery charger 830 via forward diode 824 and embedded in the battery bank 840 through control of switching element 831 and inductor 832. Desired charge / discharge control can be performed at 841.

The DC power supplied from the boost converter 820 or the battery bank 840 is input to the independent power inverter 850, and the DC power having a constant voltage from which the ripple is removed from the capacitor 851 is applied to the IGBT module 852. The switching is converted to AC power of a constant voltage at a constant frequency, a sinusoidal AC power is made through the output filter 853, and supplied to the customer, and the circuit breaker 860 has the same function as the grid-connected type.

In the case of the independent power supply type, the wind power generator can be used by the consumer at any time in the low voltage or higher region of the battery, not due to the strong or weak wind speed. However, if the wind-free period lasts for a long time, the power may not be available.

As described above, the coupling structure of the vertical shaft and the rotary shaft of the vertical shaft wind turbine turbine and the vertical shaft wind power generation system according to the present invention and the vertical shaft wind power system have been described with reference to the illustrated drawings. The present invention is not limited thereto, and various modifications may be made by those skilled in the art within the technical scope of the present invention.

Figure 1a and Figure 1b is a schematic diagram showing the shape and rotational force generation of a conventional H type vertical shaft wind turbine.

Figure 2 is a graph showing the change in lift force of the airfoil according to the rotation of the conventional H type vertical axis wind turbine.

Figure 3 is a schematic diagram showing the speed triangular shape of a conventional symmetrical impulse vertical axis wind turbine and turbine blades.

Figures 4a and 4b is a schematic view showing the speed triangular shape of the asymmetric impulse vertical axis wind turbine and turbine blades according to the present invention.

Figure 5 is a schematic diagram showing the main design parameters of the asymmetric impulse vertical axis wind turbine blades according to the present invention.

Figure 6 is another preferred embodiment of the asymmetric impulse vertical axis wind turbine blade according to the present invention.

Figure 7 is a graph showing the efficiency for the three design variables tested for blade shape parameters in accordance with the present invention.

8 is a graph showing the performance of the asymmetrical impulse vertical axis wind turbine according to the design variable according to the present invention.

9 is a perspective view of a vertical axis wind power generation system according to the present invention.

10 is a front view of a vertical axis wind power generation system according to the present invention.

11 is a cross-sectional view of a vertical axis wind power generation system according to the present invention.

12A and 12B are partially enlarged views of a cross-sectional view of a coupling structure of a vertical axis and a rotation axis of a vertical axis wind power generation system according to the present invention;

Figure 12c is an enlarged view of a portion of the coupling structure of the blade and the frame of the vertical axis wind power generation system according to the present invention.

13 is a perspective view of a vertical axis wind power generation system according to another preferred embodiment of the present invention.

14 is an exploded view of a vertical axis wind power generation system according to another preferred embodiment of the present invention.

15 is a cross-sectional view of a vertical axis wind power generation system according to another preferred embodiment of the present invention.

16A, 16B, 16C, and 16D are partially enlarged views of a cross-sectional view of a vertical axis wind power generation system according to another preferred embodiment of the present invention.

17 is a cross-sectional view of a vertical axis wind power generation system according to another preferred embodiment of the present invention.

18A, 18B, and 18C are partially enlarged views of a cross-sectional view of a vertical axis wind power generation system according to another preferred embodiment of the present invention.

19A and 19B are perspective views of a vertical axis wind power generation system according to another preferred embodiment of the present invention.

20 is an embodiment of the electric control system configuration of a grid-connected wind power generator of a small horizontal axis installation wind power generation system according to the present invention.

21 is an embodiment of the electric control system configuration of an independent power type wind power generator of a small horizontal axis installation wind power generation system according to the present invention.

22A and 22B are cross-sectional views illustrating a coupling between a rotor and a fixed vertical shaft of a conventional vertical shaft wind power generation system.

<Description of the symbols for the main parts of the drawings>

10: vertical axis wind power generation system 100: turbine rotor

110: axis of rotation 120: blade

130: frame portion 160: vertical axis

165: first bearing 171: second bearing

175: third bearing

400: tower 500: tower support flange

600: generator

Claims (4)

A rotating shaft and a plurality of blades, The blade is formed asymmetrically the inlet or outlet angle of the inlet or outlet shape in the downstream direction, the value of the blade cord length (C) and pitch ratio (P) of the rotor blades
Figure 112009068894963-PAT00035
Is between 0.3 and 0.6, the ratio of blade inner diameter to outer diameter
Figure 112009068894963-PAT00036
Is between 0.8 and 1.1, and the ratio of cord length (C) to blade outer diameter (R1)
Figure 112009068894963-PAT00037
The turbine shaft for vertical axis wind power generation, characterized in that between 0.6 and 1.3. A rotating shaft and a plurality of blades, The blade is formed asymmetrically the inlet or outlet angle of the inlet or outlet shape in the downstream direction, the value of the blade cord length (C) and pitch ratio (P) of the rotor blades
Figure 112009068894963-PAT00038
Is between 0.3 and 0.6, the ratio of blade inner diameter to outer diameter
Figure 112009068894963-PAT00039
Is between 0.8 and 1.1, and the ratio of cord length (C) to blade outer diameter (R1)
Figure 112009068894963-PAT00040
Turbine rotor for vertical axis wind power generation, characterized in that between 0.6 and 1.3; Vertical axis; Including a bearing located inside the vertical axis, The vertical axis is coupled to the outer diameter of the bearing, the vertical axis wind power generation system, characterized in that the rotating shaft is coupled to the inner diameter of the bearing. A rotating shaft and a plurality of blades, The blade is formed asymmetrically the inlet or outlet angle of the inlet or outlet shape in the downstream direction, the value of the blade cord length (C) and pitch ratio (P) of the rotor blades
Figure 112009068894963-PAT00041
Is between 0.3 and 0.6, the ratio of blade inner diameter to outer diameter
Figure 112009068894963-PAT00042
Is between 0.8 and 1.1, and the ratio of cord length (C) to blade outer diameter (R1)
Figure 112009068894963-PAT00043
Turbine rotor for vertical axis wind power generation, characterized in that between 0.6 and 1.3; Vertical axis; And a second bearing coupled to the inner diameter of the vertical shaft, and a second bearing coupled to the outer diameter of the vertical shaft. A rotating shaft and a plurality of blades, The blade is formed asymmetrically the inlet or outlet angle of the inlet or outlet shape in the downstream direction, the value of the blade cord length (C) and pitch ratio (P) of the rotor blades
Figure 112009068894963-PAT00044
Is between 0.3 and 0.6, the ratio of blade inner diameter to outer diameter
Figure 112009068894963-PAT00045
Is between 0.8 and 1.1, and the ratio of cord length (C) to blade outer diameter (R1)
Figure 112009068894963-PAT00046
Turbine rotor for vertical axis wind power generation, characterized in that between 0.6 and 1.3; Vertical axis; A vertical shaft including a rotation shaft and a bearing positioned at an outer diameter of the vertical shaft, including a girth gear installed at the outer diameter of the rotary shaft, a pinion gear connected to the girth gear, and a gear box or a generator connected to the pinion gear. Wind power generation system.
KR1020090107949A 2009-11-10 2009-11-10 Turbine rotor for vertical wind turbine and vertical wind turbine system KR20110051397A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103573553A (en) * 2012-08-10 2014-02-12 李东林 Blade incidence-angle-adjustable type vertical-shaft wind turbine
KR20170001543A (en) 2015-11-19 2017-01-04 (주)지인테크 Wind generator module and module type vertical axis wind power generator
KR101698060B1 (en) 2015-11-19 2017-01-23 (주)지인테크 Module type wind power generator
KR20180083190A (en) 2017-01-12 2018-07-20 (주)지인테크 Module type wind power generator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103573553A (en) * 2012-08-10 2014-02-12 李东林 Blade incidence-angle-adjustable type vertical-shaft wind turbine
KR20170001543A (en) 2015-11-19 2017-01-04 (주)지인테크 Wind generator module and module type vertical axis wind power generator
KR101698060B1 (en) 2015-11-19 2017-01-23 (주)지인테크 Module type wind power generator
KR20180083190A (en) 2017-01-12 2018-07-20 (주)지인테크 Module type wind power generator

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