CN111255620A - Tidal current energy power generation device based on rotation acceleration - Google Patents
Tidal current energy power generation device based on rotation acceleration Download PDFInfo
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- CN111255620A CN111255620A CN202010163235.8A CN202010163235A CN111255620A CN 111255620 A CN111255620 A CN 111255620A CN 202010163235 A CN202010163235 A CN 202010163235A CN 111255620 A CN111255620 A CN 111255620A
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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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/26—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy
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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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/12—Blades; Blade-carrying rotors
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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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/16—Stators
- F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
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- 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
- F05B2220/00—Application
- F05B2220/70—Application in combination with
- F05B2220/706—Application in combination with an electrical generator
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- 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
- Y02E10/20—Hydro energy
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- 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
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Oceanography (AREA)
- Hydraulic Turbines (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
Disclosed is a tidal current energy power generation device based on rotation acceleration. The vertical axis tidal current energy power generation device always has a certain deflection angle with the incoming flow direction, namely the force for driving the blades to rotate is actually the component force of the incoming flow acting on the blades, so that the rotating moment of the water turbine is small, the energy is lost, the self-starting is difficult, and the capture efficiency and the power generation power of the power generation device are low. The accelerating guide wheel comprises an upper end plate, a lower end plate and a plurality of guide plates, wherein the upper end plate and the lower end plate are sequentially horizontally arranged from top to bottom, the plurality of guide plates are arranged between the upper end plate and the lower end plate, a guide gap is formed between every two adjacent guide plates, an inner cavity is formed by enclosing the upper end plate, the lower end plate and the plurality of guide plates, a paddle wheel is arranged in the inner cavity, the plurality of guide gaps are communicated with the inner cavity, a transmission assembly and a power generation device are arranged outside the accelerating guide wheel, and the output end of the paddle wheel is connected with the power generation device through the transmission assembly.
Description
The technical field is as follows:
the invention relates to a power generation device, and belongs to the technical field of power generation by utilizing tidal energy.
Background art:
tidal current energy is an important ocean energy source, and the energy source has the advantages of abundant reserves, greenness, no pollution, good developability and the like, so the tidal current energy is a novel energy source with great development potential. At present, the power generation device developed and utilized by human beings mainly has two modes of a horizontal shaft type and a vertical shaft type. Compared with a horizontal shaft tidal current energy power generation device, the vertical shaft tidal current energy power generation device has the advantages of simple structure, easiness in manufacturing, no influence of the flow direction of the tidal current and the like. However, in practical application, the vertical axis tidal current energy power generation device also has defects, such as small rotating moment of the blades, difficulty in starting, low capture efficiency, low power generation and the like. The main reason for these disadvantages is that the blades always have a certain deflection angle with the incoming flow direction, that is, the force for driving the blades to rotate is the component force of the incoming flow acting on the blades, so that the rotation torque of the water turbine is small, the energy is lost, and further the self-starting is difficult, and the capture efficiency and the power generation power of the power generation device are low.
Patent document CN103306884A entitled vertical axis floating type tidal current energy power generation device discloses a floating type vertical axis tidal current energy power generation device including a floating carrier, a water turbine, a truss, a rotating track, a power generation and blade control mechanism. The blades of the device are hydrofoil type blades, the principle is that the lift force on the blades is utilized to generate a rotating moment, and the blades and water flow always have a certain deflection angle, so that the lift force is only a component force of a water flow acting force, the rotating moment of the water turbine is small, self-starting is difficult, and the capture efficiency and the power generation power are low.
Therefore, how to fundamentally solve the problems of small rotation moment, difficult self-starting, low capture efficiency and low power generation power of the vertical axis tidal current energy power generation device is an urgent problem to be solved at present.
The invention content is as follows:
in order to solve the problems mentioned in the background art, the invention aims to provide a tidal current energy power generation device based on rotation acceleration.
The technical scheme adopted by the invention is as follows:
the utility model provides a trend can power generation facility based on rotation is with higher speed, is including accelerating inducer, oar wheel, drive assembly and power generation unit, accelerating inducer includes upper end plate, lower end plate and several guide plate, upper end plate and lower end plate are from last to down level setting in proper order, and the several guide plate is arranged between upper end plate and lower end plate, is formed with the water conservancy diversion clearance between per two adjacent guide plates, encloses between upper end plate, lower end plate and the several guide plate and closes to be formed with the inner chamber, and a plurality of water conservancy diversion clearances all are linked together with the inner chamber, and the oar wheel sets up in the inner chamber, and drive assembly and power generation unit set up outside accelerating inducer, and the output of oar wheel is connected with power generation unit through drive assembly.
As a preferable scheme: the upper end plate and the lower end plate are circular plates, the upper end plate and the lower end plate are coaxially arranged, and the outer diameter of the upper end plate is smaller than or equal to that of the lower end plate.
As a preferable scheme: the apron board is arranged on the upper end plate along the circumferential direction of the upper end plate, and the vertical distance from the apron board to the lower end plate is gradually reduced from one end of the apron board far away from the paddle wheel to the other end of the apron board close to the paddle wheel.
As a preferable scheme: the guide plate is a straight plate body.
Preferably, the height direction of the guide plate is the same as the axial direction of the upper end plate, and an included angle formed between the plane of the guide plate and the radial direction of the upper end plate is a torsion angle α.
As a preferable scheme: the transmission assembly comprises a first transmission rod, a first bevel gear, a second bevel gear and a second transmission rod, the first transmission rod penetrates through the upper end plate to be connected with the paddle wheel, the first bevel gear is sleeved on the first transmission rod, the second bevel gear is sleeved on one end of the second transmission rod, the other end of the second transmission rod is connected with the power generation unit, and the first bevel gear is meshed with the second bevel gear.
As a preferable scheme: the paddle wheel comprises a paddle shaft and a plurality of paddles, the plurality of paddles are uniformly distributed on the paddle shaft along the circumferential direction of the paddle shaft, and each paddle is fixedly connected with the paddle shaft into a whole.
As a preferable scheme: the bottom of the accelerating guide wheel is provided with a base, the lower end plate is arranged on the base, and the lower end plate is hinged with the base.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the accelerating guide wheel, the paddle wheel, the transmission assembly and the power generation unit are mutually matched to ensure that water flow enters the inner cavity through the guide gap, linear motion is converted into circular rotation, the flow direction of the water flow in the inner cavity is always vertical to the paddle in the paddle wheel, and the energy conversion process of increasing the moment by more than two times is realized.
The shape and the structural arrangement of the acceleration guide wheel can realize that the self-starting process can be realized by utilizing water flow at any angle, the direction applicability is strong, other starting structures are not needed, the device is more suitable for the sea bottom, and direct contact operation is not needed to be controlled by manpower.
And thirdly, the working mode of the acceleration guide wheel is a confluence mode, namely accelerated incoming flow is converged, the energy gathering effect is achieved, the capture efficiency is directly improved, and calculation and verification show that the power generation power of the acceleration guide wheel is at least twice of that of the conventional vertical axis tidal current energy power generation unit.
Fourthly, the invention has simple integral structure and low manufacturing, transferring and maintaining cost.
And fifthly, the invention is easy to modularize and convenient for large-scale popularization and application.
Description of the drawings:
for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a first schematic front view of the present invention;
FIG. 3 is a second schematic front view showing the structure of the present invention, wherein a skirt board is disposed around the upper end plate;
FIG. 4 is a schematic perspective view of the connection between the paddle wheel and the transmission mechanism;
FIG. 5 is a schematic top view of the present invention with the top end plate removed;
FIG. 6 is a schematic perspective view of the relationship between the deflector and the paddle wheel;
FIG. 7 is a flow velocity distribution diagram of the accelerated diversion wheel after rotating and accelerating the water flow;
FIG. 8 is a flow velocity profile around the paddle wheel in the inner cavity of the accelerating inducer;
fig. 9 is a pressure profile around the paddle wheel in the inner cavity of the accelerating inducer.
In the figure: 1-accelerating guide wheel; 1-1-upper end plate; 1-2-lower end plate; 1-3-a baffle; 2-paddle wheel; 2-1-propeller shaft; 2-2-blade; 3-a transmission assembly; 3-1-a first transfer lever; 3-2-first bevel gear; 3-3-second bevel gear; 3-4-a second drive link; 4-a power generation unit; 5-a flow guiding gap; 6-inner cavity; 8-skirting board; 9-base.
The specific implementation mode is as follows:
in order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the drawings, and other details not so relevant to the present invention are omitted.
The first embodiment is as follows: the embodiment is described with reference to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8 and fig. 9, and includes an accelerating inducer 1, a paddle wheel 2, a transmission assembly 3 and a power generation unit 4, where the accelerating inducer 1 includes an upper end plate 1-1, a lower end plate 1-2 and a plurality of deflectors 1-3, the upper end plate 1-1 and the lower end plate 1-2 are horizontally arranged from top to bottom, the plurality of deflectors 1-3 are arranged between the upper end plate 1-1 and the lower end plate 1-2, a diversion gap 5 is formed between every two adjacent deflectors 1-3, an inner cavity 6 is defined between the upper end plate 1-1, the lower end plate 1-2 and the plurality of deflectors 1-3, the plurality of diversion gaps 5 are all communicated with the inner cavity 6, the paddle wheel 2 is arranged in the inner cavity 6, the transmission assembly 3 and the power generation unit 4 are arranged outside the accelerating inducer 1, and the output end of the paddle wheel 2 is connected with the power generation unit 4 through the transmission assembly 3. The preferred location for the power generation unit 4 in this embodiment is the top of the upper end plate 1-1, which converts the kinetic energy of the water flow into electrical energy. The power generation unit 4 is an existing power generation product capable of converting kinetic energy into electric energy, and is preferably a power generation unit with an induction coil.
The second embodiment is as follows: the present embodiment is further limited to the first embodiment, the upper end plate 1-1 and the lower end plate 1-2 are both circular plates, the upper end plate 1-1 and the lower end plate 1-2 are coaxially disposed, and the outer diameter of the upper end plate 1-1 is smaller than or equal to the outer diameter of the lower end plate 1-2.
Furthermore, the accelerating guide wheel 1 is a rotating accelerating structure of water flow, is made of metal, and has a size determined according to the working terrain environment and the specific design requirements. The upper end plate 1-1 and the lower end plate 1-2 are round plates and are horizontally arranged in parallel from top to bottom, and the upper end plate 1-1 and the lower end plate 1-2 are matched with the plurality of flow guide plates 1-3 to effectively prevent energy loss in the vertical direction, wherein the vertical direction refers to the axial direction of the upper end plate 1-1.
Furthermore, the plurality of guide plates 1-3 are array plate groups, namely the plurality of guide plates 1-3 are uniformly fixed in an annular space between the upper end plate 1-1 and the lower end plate 1-2 in a circular array mode, each guide plate 1-3 in the plurality of guide plates 1-3 is perpendicular to the upper end plate 1-1 and the lower end plate 1-2 at the same time, and water flow is converted into rotary motion in the rotary energy concentrator from linear propagation under the action of the array plate groups and generates an acceleration effect.
The third concrete implementation mode: in the first or second embodiment, the upper end plate 1-1 is provided with a circle of apron plate 8 along the circumferential direction, and the vertical distance from the apron plate 8 to the lower end plate 1-2 decreases from one end of the apron plate 8 far away from the paddle wheel 2 to the other end of the apron plate 8 close to the paddle wheel 2. The apron board 8 arranged in this way can effectively increase the inflow space of the invention, widen the inflow position and realize the wide-angle type multidirectional inflow effect.
The fourth concrete implementation mode: the present embodiment is further limited to the first, second or third embodiment, and the air deflectors 1 to 3 are straight plate bodies.
Fifth embodiment, this embodiment is further defined as the first, second, third, or fourth embodiment, a height direction of the flow guide plate 1-3 is the same as an axial direction of the upper end plate 1-1, and an included angle formed between a plane of the flow guide plate 1-3 and a radial direction of the upper end plate 1-1 is a torsion angle α.
Furthermore, simulation tests show that the value range of the torsion angle α is 30-60 degrees.
Further, as shown in fig. 5, 7, 8 and 9, when the torsion angles α of the plurality of guide plates 1-3 are the same, the size and the structure of the guide gap 5 formed between every two adjacent guide plates 1-3 are the same, and the plurality of guide plates 1-3 are uniformly arranged in the annular space between the upper end plate 1-1 and the lower end plate 1-2.
The sixth specific implementation mode: the present embodiment is further limited to the first, second, third, fourth or fifth embodiments, and the plurality of flow guiding gaps 5 are wide gaps and/or narrow gaps.
Further, the number of the guide plates 1-3 is appropriately increased so that a plurality of guide gaps 5 formed between the upper end plate 1-1 and the lower end plate 1-2 of a predetermined size are narrow gaps, the number of the guide plates 1-3 is appropriately decreased so that a plurality of guide gaps 5 formed between the upper end plate 1-1 and the lower end plate 1-2 of a predetermined size are wide gaps, a wide area is formed between a plurality of guide plates 1-3 having wide gaps, and a narrow area is formed between a plurality of guide plates 1-3 having narrow gaps.
Further, wide width regions and narrow width regions are simultaneously present alternately between the upper end plate 1-1 and the lower end plate 1-2.
Further, the preferable number of the wide area and the narrow area is two.
The seventh embodiment: the embodiment is further limited by the first, second, third, fourth, fifth or sixth embodiment, the transmission assembly 3 comprises a first transmission rod 3-1, a first bevel gear 3-2, a second bevel gear 3-3 and a second transmission rod 3-4, the first transmission rod 3-1 passes through the upper end plate 1-1 and is connected with the paddle wheel 2, the first bevel gear 3-2 is sleeved on the first transmission rod 3-1, the second bevel gear 3-3 is sleeved on one end of the second transmission rod 3-4, the other end of the second transmission rod 3-4 is connected with the power generation unit 4, and the first bevel gear 3-2 is meshed with the second bevel gear 3-3.
Further, the first transmission rod 3-1 penetrates through the upper end plate 1-1 to be connected with the paddle wheel 2 preferably in a fixed mode.
Further, a first bevel gear 3-2 is fixedly sleeved on the first transmission rod 3-1.
Further, the second bevel gear 3-3 is fixedly sleeved on one end of the second transmission rod 3-4.
Further, other existing transmission mechanisms capable of achieving the transmission effect can be replaced.
Furthermore, a sealing waterproof cover is arranged outside the transmission assembly 3 and the power generation unit 4, the sealing waterproof cover is a circular arc or square cover body, a sealing structure is arranged at the contact position of the sealing waterproof cover and the upper end plate 1-1, the sealing waterproof cover is used for preventing the transmission assembly 3 and the power generation unit 4 from water inflow, an effective waterproof effect is achieved, and the size of the transmission assembly 3 and the power generation unit 4 is matched with the position and the size of the sealing waterproof cover.
The specific implementation mode is eight: the embodiment is further limited by the first, second, third, fourth, fifth, sixth or seventh embodiment, and one preferable structure of the paddle wheel 2 comprises a paddle shaft 2-1 and a plurality of paddles 2-2, the plurality of paddles 2-2 are uniformly distributed on the paddle shaft 2-1 along the circumferential direction of the paddle shaft 2-1, and each paddle 2-2 is fixedly connected with the paddle shaft 2-1 into a whole.
Further, the axis is arranged on the central axis of the length direction of the paddle shaft 2-1, the paddle wheel 2 rotates around the axis, and the axis of the paddle wheel 2 is perpendicular to the upper end plate 1-1 and the lower end plate 1-2 respectively.
Furthermore, the preferred shape of oar axle 2-1 is cylindrical, and the setting can effectively prevent rivers along oar 2-2 to the direction of centre of a circle, reduces energy loss.
Furthermore, the paddles 2-2 are uniformly arranged on the outer circumferential surface of the paddle shaft 2-1 in a radial shape. The water flow after rotating acceleration vertically acts on the paddle 2-2, so that the paddle wheel 2 generates rotating motion.
The specific implementation method nine: the embodiment is further limited by the first, second, third, fourth, fifth, sixth, seventh or eighth embodiment, a base 9 is arranged at the bottom of the acceleration guide wheel 1, the lower end plate 1-2 is arranged on the base 9, and the lower end plate 1-2 is hinged with the base 9. The bottom of base 9 can be dismantled with the seabed and be connected, and the bottom processing of base 9 has the connecting hole, and cooperation ground nail realizes being connected with dismantling of seabed, and the top of base 9 is provided with waterproof bearing, and the bottom of leading wheel 1 is provided with higher speed and inserts the post with waterproof bearing matched with, and waterproof bearing can make with higher speed leading wheel 1 both with seabed stable connection with inserting the post and cooperate, realizes stable positioning, still does not influence the normal rotation of leading wheel 1 with higher speed.
The detailed implementation mode is ten: the embodiment is further limited to the first, second, third, fourth, fifth, sixth, seventh, eighth or ninth embodiment, as shown in fig. 1, 2 and 3, the accelerating inducer 1 comprises an upper end plate 1-1, a lower end plate 1-2 and a plurality of deflectors 1-3, the upper end plate 1-1 and the lower end plate 1-2 are both circular, and the radius R is3The two end plates are parallel, and the vertical distance between the upper end plate 1-1 and the lower end plate 1-2 is h1The upper end plate 1-1 and the lower end plate 1-2 play a role in preventing energy loss in the vertical direction; the height difference between the inner edge of the apron board 8 and the outer edge thereof is h3The radial width of the apron board 8 along the upper end plate 1-1 is l1. The plurality of guide plates 1-3 are arranged between the upper end plate 1-1 and the lower end plate 1-2, the outer ends of the plurality of guide plates 1-3 are positioned on the same circumference, and the radius of the circumference is R2A plurality of guide plates 1-3 are arranged between the upper end plate 1-1 and the lower end plate 1-2, and the radius of the guide plates is more than or equal to R1And is less than or equal to R2Each guide plate 1-3 in an array plate group consisting of a plurality of guide plates 1-3 is vertical to an upper end plate 1-1 and a lower end plate 1-2, and the torsion angle α of each guide plate 1-3 is the same in the annular area, under the action of the array plate group, water flow is converted into rotary motion in a rotary accelerator from linear flow, and simultaneously, the incident flow surface is 2R2×(h1+h3) The water flow is converged to the upstream area of 2R1×h1In the region of (R)2Greater than R1) To play a role ofEnergy gathering and accelerating effects.
Further, as shown in fig. 2, 4 and 5, the paddle wheel 2 can rotate around the axis, and the height of the paddle wheel 2 is h2，h2Less than h1. The axle center of the paddle wheel 2 is vertical to the upper end plate 1-1 and the lower end plate 1-2; the paddle shaft 2-1 is cylindrical and has a radius r1The water flow can be prevented from flowing along the blades 2-2 to the direction of the circle center, and the energy loss is reduced; the blades 2-2 are preferably rectangular in shape, and each blade 2-2 has a length r2Each paddle 2-2 is uniformly arranged on the outer circumferential surface of the paddle shaft 2-1 in a radial shape. The water flow after rotating acceleration vertically acts on the paddle 2-2 to drive the paddle wheel 2 to generate rotating motion.
Further, as shown in fig. 2 and 3, the power generation unit 4 is disposed on the top of the upper end plate 1-1 to convert the kinetic energy of the water flow into electric energy.
The working principle of the embodiment is that after water flows through a plurality of guide plates 1-3, the water flow generates rotary motion inside because each guide plate 1-3 has a torsion angle α, and meanwhile, the incident flow surface is 2R2×(h1+h3) The water flow is converged to the upstream area of 2R1×h1In the region of (a), the water flow is accelerated. The water flow after rotation acceleration always vertically acts on the blades 2-2, the rotation torque is large, the self-starting problem can be solved, the conversion efficiency is improved, and meanwhile, the power generation power can be obviously improved due to the energy accumulation effect.
In order to prove the power generation effect and the power generation efficiency of the device, the rotation acceleration effect of the acceleration guide wheel 1 is numerically calculated. At this time, the paddle wheel 2 is not arranged inside the accelerating inducer 1.
The selected working conditions are that the accelerating guide wheel 1 is made of steel, the number of the guide plates 1-3 is 40, the torsion angle α is 35 degrees, and the inner diameter R of the annular area for installing the array plate group10.8m, outer diameter R22.3m, radius R of lower end plate 1-232.5m, the vertical distance h between the upper end plate 1-1 and the lower end plate 1-211.1 m. The height difference h between the inner edge of the apron 8 and its outer edge30.2m, the skirt panel 8 has a radial width l of the upper end plate 1-110.4m, upperThe thickness of the end plate 1-1, the lower end plate 1-2 and the guide plate is 3 cm. The inflow velocity is V equal to 1m/s, and the fluid problem is subjected to simulation analysis by adopting fluid calculation software Star-CCM +.
Fig. 7 is a velocity vector profile of the flow field after stabilization, with water flow in from the right and out from the left. It can be seen from the figure that the water flow rotates inside after passing through the accelerating inducer 1, and the flow speed is obviously increased compared with the inflow, and the inner water flow speed can reach 2.0m/s through calculation. Thus verifying the rotation and acceleration capabilities of the accelerating inducer 1.
Subsequently, the actual gain when the paddle wheel 2 is placed inside the accelerating inducer 1 is calculated. The paddle wheel 2 is made of steel, and the radius r of the paddle shaft is 2-110.3m, the number of blades 2-2 is 6, the length r of each blade 2-220.4 m. The height of the propeller shaft 2-1 and the propeller blade 2-2 is h21.0m, the blade 2-2 has a thickness of 2 cm. The moment of inertia I of the whole paddle wheel 2 is 203 kg.m2. Through calculation, the rotation angular speed omega of the stabilized rear paddle wheel 2 is 2.4rad/s, and the rotation kinetic energy is calculated according to the formula W1＝0.5Iω2584.64J. According to the prior art, the power generation efficiency of the vertical shaft power generation device is about 40%. Thus, consider the area of the paddle wheel 2 facing the flow S × (r) 2 × (r)1+r2)·h2＝1.4m2Density rho of water is 1000kg/m3The inflow velocity V is 1 m/s. The inflow kinetic energy is W2＝0.5SρV3700J, the capture efficiency η is 40%, and then the capture energy of the vertical axis generator with the same incident flow area is W in the prior artCapture＝W2X η is 280J, therefore, the capture energy (584.64J) of the tidal current energy power generation device formed based on the accelerating guide wheel 1 is increased by 108.8% compared with the vertical shaft power generation device (280J), so that the efficient power generation effect of the invention is verified.
Fig. 8 is a water velocity distribution diagram around a propeller shaft 2-1 inside the acceleration inducer 1 in the case, and the diagram shows that the tail end flow velocity of the propeller blade 2-2 can reach 2m/s, which is obviously larger than the inflow velocity 1m/s, so that the acceleration effect is achieved. Because the movement of the water flow is rotary movement, the force generated by the water flow always vertically acts on the blades 2-2, the torque is increased, the self-starting problem can be solved, the capture efficiency and the power generation power are improved, and the beneficial effects of the invention are verified.
Fig. 9 is a water flow pressure distribution diagram around a propeller shaft 2-1 inside an accelerating inducer 1 in the case, in the diagram, a water flow inflow side (right side) is positive pressure, a water flow outflow side (left side) is negative pressure, and the pressure difference increases the torque of the propeller blade 2-2, so that the self-starting problem can be effectively solved, and the beneficial effects of the invention are verified, namely the invention can enable water flow to always vertically act on the propeller blade 2-2 after passing through the accelerating inducer 1, increase the torque, reduce the energy loss, solve the self-starting problem, improve the capture efficiency and increase the power generation power.
The working principle is as follows:
the acceleration guide wheel 1 is used for rotating and accelerating incoming flow; the paddle wheel 2 makes a self circumferential rotation motion under the action of water flow so as to capture tidal current energy; the transmission mechanism 3 transmits the mechanical energy of the paddle wheel 2 to the power generation unit 4, and the power generation unit 4 is used for generating electric energy.
Claims (8)
1. The utility model provides a trend can power generation facility based on rotation is accelerated which characterized in that: the device comprises an accelerating guide wheel (1), a paddle wheel (2), a transmission assembly (3) and a power generation unit (4), wherein the accelerating guide wheel (1) comprises an upper end plate (1-1), a lower end plate (1-2) and a plurality of guide plates (1-3), the upper end plate (1-1) and the lower end plate (1-2) are sequentially and horizontally arranged from top to bottom, the plurality of guide plates (1-3) are arranged between the upper end plate (1-1) and the lower end plate (1-2), a guide gap (5) is formed between every two adjacent guide plates (1-3), an inner cavity (6) is formed by enclosing the upper end plate (1-1), the lower end plate (1-2) and the plurality of guide plates (1-3), the plurality of guide gaps (5) are communicated with the inner cavity (6), and the paddle wheel (2) is arranged in the inner cavity (6), the transmission component (3) and the power generation unit (4) are arranged outside the accelerating inducer (1), and the output end of the paddle wheel (2) is connected with the power generation unit (4) through the transmission component (3).
2. The tidal current energy power generation device based on the rotational acceleration as set forth in claim 1, wherein: the upper end plate (1-1) and the lower end plate (1-2) are both circular plates, the upper end plate (1-1) and the lower end plate (1-2) are coaxially arranged, and the outer diameter of the upper end plate (1-1) is smaller than or equal to that of the lower end plate (1-2).
3. The tidal current energy power generation device based on the rotational acceleration as set forth in claim 2, wherein: an apron board (8) is arranged on the upper end plate (1-1) along the circumferential direction of the upper end plate, and the vertical distance from the apron board (8) to the lower end plate (1-2) is gradually decreased from one end of the apron board (8) far away from the paddle wheel (2) to the other end of the apron board (8) close to the paddle wheel (2).
4. A tidal current energy generation device based on rotation acceleration as claimed in claim 1, 2 or 3, wherein: the guide plates (1-3) are straight plates.
5. The tidal current energy power generation device based on the rotational acceleration is characterized in that the height direction of the guide plates (1-3) is the same as the axial direction of the upper end plate (1-1), and the included angle formed between the plane of the guide plates (1-3) and the radial direction of the upper end plate (1-1) is a torsion angle α.
6. The tidal current energy power generation device based on the rotational acceleration as set forth in claim 1, wherein: the transmission assembly (3) comprises a first transmission rod (3-1), a first bevel gear (3-2), a second bevel gear (3-3) and a second transmission rod (3-4), the first transmission rod (3-1) penetrates through the upper end plate (1-1) to be connected with the paddle wheel (2), the first bevel gear (3-2) is sleeved on the first transmission rod (3-1), the second bevel gear (3-3) is sleeved on one end of the second transmission rod (3-4), the other end of the second transmission rod (3-4) is connected with the power generation unit (4), and the first bevel gear (3-2) is meshed with the second bevel gear (3-3).
7. The tidal current energy power generation device based on the rotational acceleration as set forth in claim 1, wherein: the paddle wheel (2) comprises a paddle shaft (2-1) and a plurality of paddles (2-2), the plurality of paddles (2-2) are uniformly distributed on the paddle shaft (2-1) along the circumferential direction of the paddle shaft (2-1), and each paddle (2-2) is fixedly connected with the paddle shaft (2-1) into a whole.
8. The tidal current energy power generation device based on the rotational acceleration as set forth in claim 1, wherein: the bottom of the accelerating guide wheel (1) is provided with a base (9), the lower end plate (1-2) is arranged on the base (9), and the lower end plate (1-2) is hinged with the base (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010163235.8A CN111255620A (en) | 2020-03-10 | 2020-03-10 | Tidal current energy power generation device based on rotation acceleration |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010163235.8A CN111255620A (en) | 2020-03-10 | 2020-03-10 | Tidal current energy power generation device based on rotation acceleration |
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| JP6592216B1 (en) * | 2019-04-23 | 2019-10-16 | 正治 内田 | Turbine and tidal power generation apparatus including the same |
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| CN1415851A (en) * | 2002-08-08 | 2003-05-07 | 天津大学 | Generator by using sea energy of low flow |
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