KR20170027427A - The duct for bicycle wind turbine that raise energy efficiency. - Google Patents

The duct for bicycle wind turbine that raise energy efficiency. Download PDF

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Publication number
KR20170027427A
KR20170027427A KR1020150124004A KR20150124004A KR20170027427A KR 20170027427 A KR20170027427 A KR 20170027427A KR 1020150124004 A KR1020150124004 A KR 1020150124004A KR 20150124004 A KR20150124004 A KR 20150124004A KR 20170027427 A KR20170027427 A KR 20170027427A
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KR
South Korea
Prior art keywords
air
duct
bicycle
rotor
wind
Prior art date
Application number
KR1020150124004A
Other languages
Korean (ko)
Inventor
이철규
Original Assignee
이철규
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이철규 filed Critical 이철규
Priority to KR1020150124004A priority Critical patent/KR20170027427A/en
Publication of KR20170027427A publication Critical patent/KR20170027427A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J6/00—Arrangement of optical signalling or lighting devices on cycles; Mounting or supporting thereof; Circuits therefor
    • B62J6/06—Arrangement of lighting dynamos or drives therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J99/00—Subject matter not provided for in other groups of this subclass
    • 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
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/04—Wind motors with rotation axis substantially parallel to the air flow entering the rotor  having stationary wind-guiding means, e.g. with shrouds or channels
    • 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 
    • F03D3/04—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor  having stationary wind-guiding means, e.g. with shrouds or channels
    • 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
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • B62J2099/004—
    • B62J2300/004—
    • 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
    • F05B2240/10—Stators
    • F05B2240/12—Fluid guiding means, e.g. vanes
    • 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
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/94—Mounting on supporting structures or systems on a movable wheeled structure
    • 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
    • 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
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • 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)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Wind Motors (AREA)

Abstract

The present invention relates to a duct used in a wind power generator for a bicycle, wherein the wind power generator generates electricity by rotating a rotary wing of the wind power generator for a bicycle mounted on a bicycle when riding the bicycle and by rotating a rotor using a permanent magnet installed on a rotary wing, the wind power generator generates electromotive force to a coil existing in a stator to supply electricity to an illumination device installed on the bicycle or to store the generated electricity in a separate battery or in a battery installed inside the power generator so as to supply the generated electricity. According to the present invention, power generation performance can be improved even when reducing the length of a duct.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct for a bicycle wind power generator,

The present invention relates to a bicycle which is installed on a bicycle and generates electricity by the wind generated during the running of the bicycle, and uses the generated electricity to turn on the light of the bicycle at night or to charge the charged battery inside or outside the generator, And more particularly, to a duct for use in a wind turbine generator for a bicycle having a function of supplying electric power to devices requiring electricity.

       When the bicycle travels, a wind is generated in the direction of the bicycle to rotate the rotating blades of the bicycle wind turbine and rotate the rotor made of the permanent magnets fixed to the shaft of the rotating blades so that the N pole and the S pole Which causes alternating magnetic field changes. The change of the magnetic field is applied to a stator made of a coil attached to the generator, and is changed into an induced electromotive force to generate a voltage and a current.

        The voltage generated by the bicycle wind turbine changes according to the rate of change of the magnetic field, that is, the number of revolutions of the permanent magnet of the rotor when the number of windings of the coil is the same, and this change is expressed by the RPM value of the rotor.

        The ducts surrounding the wings attached to the rotor of the bicycle generator are used to assist in the inflow and outflow of wind power generators and to support the generators. Generally, a circular shaped duct used in a generator receives outside air through a narrow inlet and discharges it to the rear of a wide shape. The wind input at a narrow inlet lowers the pressure and accelerates the speed of the rotor rapidly. The accelerated air expels the air from the widened outlet to the outside, thereby facilitating the flow of air entering the narrow passageway of the inlet by rapidly diffusing the air around.

          The narrow inlet of the bicycle generator duct is used for the purpose of making the air pressure inside the duct lower than the air pressure outside the duct, and the flow of the fast air accelerates the rotation of the generator wing to increase the power generation.

          This conventional technique requires a considerably long conical duct structure in order to obtain the necessary air acceleration effect according to Bernoulli's theorem and the venturi effect. As a result, the volume of the generator increases, the weight increases, and the air resistance increases. Therefore, it is important to reduce the size and length of the duct.

   In the present invention, when the rotor blade of the same size is used while reducing the overall volume occupied by the duct by reducing the length of the duct by using a cylindrical or conical duct used in a conventional wind power generator for bicycles, the conventional wind turbine rotor Of the conventional bicycle wind turbine generator is designed to have a rotation speed higher than the speed of the conventional bicycle wind turbine generator so as to produce the energy efficiency equal to or higher than the energy efficiency of the conventional bicycle wind turbine generator .

   According to Bernoulli's theorem, the present invention solves the problem based on the scientific principle that the fluid is inversely proportional to the cross-sectional area size of the space through which the fluid passes, so that the passage velocity of the fluid increases and the pressure of the space through which the fluid passes becomes lower. In the bicycle wind turbine, the air that constitutes the wind that rotates the wing attached to the rotor is also fluid like. Air, as mentioned in Berunui's theorem, speeds up at narrow openings where wind is input and slow at wide openings when passing through simple cylindrical and conical ducts used in conventional technology. The streamlined duct length from the narrow inlet to the wide outlet inside the duct should be long enough to allow the air to flow faster and to reduce the pressure sufficiently. Also, in order for the flow of air passing through the straight path to be the same, the air that follows the stream path must move at a higher speed.

The present invention proposes a protrusion structure for increasing the flow of air by further narrowing the path of the portion where the rotor blade is located than the inlet where air is input so that the rotor blade of the duct rotates at a higher speed, If the length of the air flow path is increased by increasing the rotation speed and using the slope of the projection to keep the airflow path length of the conventional cylindrical and conical ducts as a whole, the same air force can be obtained even if the duct length is reduced The present invention implements an important technical solution of the present invention.

In the present invention, a protrusion for increasing the flow path of the air is installed in a position of optimizing the speed of the rotary vane inside the entrance of the reverse funnel-shaped streamlined duct to further reduce the air flow area, To increase the energy efficiency of the generator by rotating the wing of the wind turbine more quickly, thereby realizing a new duct structure.

According to the present invention, it is possible to design a compact, high-performance wind turbine generator having a short duct length by reducing the length of the duct for increasing the volume of the bicycle wind turbine generator and increasing the performance of the wind turbine generator. By reducing the volume of the wind power generator, it becomes easier to install the wind power generator for bicycle and the appearance of the wind power generator can be made more sophisticated design than the product based on the conventional technology to increase the value of the product. The present invention can be applied not only to a bicycle wind power generator but also to a general duct type large wind power generator and a hydraulic power generator.

Fig. 1 (1) is a schematic view of a duct to which the present invention is applied
Fig. 1 (2) is an enlarged view of a projection of a duct to which the present invention is applied
FIG. 1 (3) is a cross-sectional view of the projection and auxiliary projection of the duct to which the present invention is applied
Fig. 1 (4) is a side view showing the installation direction of the auxiliary projection
2 is a cross-sectional view of a conventional wind turbine duct
3 is a cross-sectional view of a conventional wind turbine duct
Figure 4 shows the air flow
5 is a partial sectional view of the helical internal gear

FIG. 1 is referred to for the purpose of describing the concrete implementation of the present invention. As shown in FIG. 1, the newly designed duct is formed of a duct body 4 composed of a duct inlet 1, a projection 2, and a duct outlet 3. When the projection 2 of the duct main body 4 is enlarged, the projection 2 rises in the duct main body 4 as shown in Fig. 1 (2), and air flows to the selected portion of the projection 2 An auxiliary projection 5 is formed which rotates in a constant direction. As shown in Fig. 1 (3), the auxiliary protrusions 5 are formed like the teeth of the gears inside the protrusions 2, and the air advances along the valleys of the auxiliary protrusions, Direction. The number of auxiliary protrusions 5 is increased in proportion to the rotational force. FIG. 1 (4) shows a direction in which the opposite protrusions 5 form a mountain opposite to one bone. The number of the mountains is the number of auxiliary protrusions 5. Fig. 5 shows a part of the helical inner gear so as to easily remind the shape of the auxiliary projection 5. Fig. In Fig. 5, the body 52 of the internal gear corresponds to the projection 2, and the gear teeth 51 become the auxiliary projection 5. The air inside the duct is rotated while flowing along the valleys of the auxiliary protrusions 5 in the form of the gear teeth 51 shown in Fig. If the number of the auxiliary protrusions 5 is too large, the frictional force becomes larger than the rotational force, which interferes with the flow of air. Therefore, the size of the auxiliary protrusions 5 is adjusted according to the diameter and the height and length of the protrusions 2.

The conventional duct implementation is formed by an inverted funnel shape formed by the duct inlet 21, the duct outlet 22 and the duct body 23 so that the duct outlet 22 is wider than the duct inlet 21, The duct 2 has a shape of a funnel shape formed by the duct inlet 31, the duct outlet 32 and the duct body 33 so that the duct inlet is narrower than the duct outlet 32. The structure of the protrusion 2 and the auxiliary protrusion 5 There is no simple structure.

The present invention differs from the prior art duct structure shown in FIGS. 2 and 3 in that the projections 2 provided inside the duct narrow the area through which air passes and the streamlined structure of the projections extends the surface area of the duct The same effect is obtained so that the length of the duct through which the air passes is shorter than that of the conventional ducts and the effect of increasing the passing speed of the air is obtained.

4 shows that the air introduced into the duct by the protrusions 2 and auxiliary protrusions 5 shown in FIG. 1 passes through the protrusions 2 to reduce the passage area of the air to lower the pressure, And that the auxiliary protrusions 5 rotate the outer air 42, 44 in accordance with the path of the air indicated by red. The air 43 flowing through the center of the duct is quickly discharged to the rear depending on the low-pressure state formed by the fast-flowing air 42, 44 flowing while rotating the widening path inside the duct. This pulls in the air (41) that enters the duct inlet, allowing it to flow through the duct more quickly.

Although not shown in the drawings, air collides with the rotor blades, protrusions, and auxiliary protrusions and escapes to the rear surface. The air is frictioned by the vortex generated at the time of the collision, which hinders the advancement to the rear surface rapidly. In the present invention, in order to reduce the friction, a riblet such as that formed on the scales of the shark is formed on the surfaces of the rotor blades, the protrusions and the auxiliary protrusions so that air flows on the surface of the rotor blades, protrusions, So that most of the air in the duct passes over the air layer to reduce the friction, so that the air flows smoothly. The smooth movement of the air has the effect of increasing the rotation speed of the rotor blades.

The rapid flow of air and the reduction of friction increase the rotational speed of the rotor blades and increase the generator voltage and current of the generator consisting of the rotor and stator to increase the energy efficiency of the generator.

The detailed description of the present invention has been provided above.

According to the present invention, it is possible to reduce the size of the rotating blades of the wind turbine installed on the bicycle, the diameter of the duct surrounding the abutment blades, and the length of the duct, so that a compact high-performance bicycle generator can be manufactured and the electricity for lighting can be supplied. The present invention can be applied not only to a bicycle wind power generator but also to a general wind power generator and a hydraulic power generator.

1: entrance
2: projection
3: Exit
4: Duct body
5: auxiliary projection
6: Duct body
21: Entrance
22: Exit
23:
31: Entrance
32: Exit
38:
41: input air
42: Rotating air
43: straight passing air
44: Rotating air
51: Gear teeth
52:

Claims (1)

(Rotor) that rotates a rotor of a bicycle wind turbine mounted on a bicycle and uses a permanent magnet installed on a rotating blades with a bike mounted on the bicycle or a force of wind that naturally occurs when the bicycle is traveling, A wind power generator for a bicycle that generates electricity by generating an electromotive force in a coil to supply electricity to a lighting device installed in the bicycle or to store electricity generated by the battery in a separate battery or a battery installed in the generator, In this case,
In order to accelerate the speed of the wind generated during bicycling and to rotate the rotating blades of the generator more rapidly by the faster wind force, streamlined projections are installed round or all around the rotor wing A streamlined projection for the purpose of achieving the same effect as increasing the passage speed of the air by decreasing the area through which air, which is a constituent of wind, is lowered to lower the pressure of the air, and extending the passage of air;
In order to rotate the rotating blades attached to the generator rotor more quickly by receiving the high-speed air flow, the rotating speed of the rotor is optimized around the projections provided so that the rotation of the rotor blades becomes the maximum speed Rotary wing;
Auxiliary protrusions are formed on the surface of the protrusions so as to prevent friction from being generated by the protrusions provided for accelerating the air while flowing air through the inside of the duct, thereby inducing a flow deflected in a specific direction so as to allow air to pass therethrough;
If necessary, it forms on the surfaces of the projections, auxiliary projections and rotor blades, and forms a minute air swirling layer on the surface when it comes into contact with the air, so that the air passes through the swirls to reduce the friction, ;
A duct main body having an operation characteristic that the air inside the duct is quickly discharged to the outside of the duct by forming a flow of air rotating around the discharge port of the duct by the auxiliary protrusion so as to make low pressure ecology;
A duct for a bicycle wind power generator.
KR1020150124004A 2015-09-02 2015-09-02 The duct for bicycle wind turbine that raise energy efficiency. KR20170027427A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150124004A KR20170027427A (en) 2015-09-02 2015-09-02 The duct for bicycle wind turbine that raise energy efficiency.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150124004A KR20170027427A (en) 2015-09-02 2015-09-02 The duct for bicycle wind turbine that raise energy efficiency.

Publications (1)

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KR20170027427A true KR20170027427A (en) 2017-03-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107143464A (en) * 2017-07-13 2017-09-08 上海应用技术大学 A kind of wind power generation plant of small-sized efficient on rapid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107143464A (en) * 2017-07-13 2017-09-08 上海应用技术大学 A kind of wind power generation plant of small-sized efficient on rapid

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