CN210859025U - Vertical shaft tidal current energy water turbine impeller with movable curve-shaped blades - Google Patents
Vertical shaft tidal current energy water turbine impeller with movable curve-shaped blades Download PDFInfo
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- CN210859025U CN210859025U CN201921510659.6U CN201921510659U CN210859025U CN 210859025 U CN210859025 U CN 210859025U CN 201921510659 U CN201921510659 U CN 201921510659U CN 210859025 U CN210859025 U CN 210859025U
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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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Abstract
The utility model discloses a vertical axis trend can hydraulic turbine impeller with mobile curvilinear blade, including evenly articulating at least three pairs of blades on the wheel hub circumference, every two blades to the blade set up respectively at the both ends of wheel hub diameter, and every two blades to the blade pass through the blade interlocking gear to connect, and the blade is whole to be arc structure and its trailing edge is the wave form. The utility model discloses a vertical axis trend can hydraulic turbine impeller with mobile curvilinear blade can effectively improve the stall characteristic of blade, weakens the vibration that is brought by the separation that flows to make the hydraulic turbine obtain bigger turning moment, improve the efficiency of the hydraulic turbine.
Description
Technical Field
The utility model belongs to the technical field of vertical axis trend can hydraulic turbine impeller, a vertical axis trend can hydraulic turbine impeller with mobile curvilinear blade is related to.
Background
The tidal current energy water turbine is a fluid machine which converts tidal current kinetic energy into mechanical energy and then converts the mechanical energy into electric energy by a power generation device. The vertical shaft tidal current energy water turbine is simple in structure, can adapt to bidirectional incoming flow, and has small influence on marine organisms. However, since the conventional blades are mostly straight blades and are fixed on the hub, when the turbine enters an operating state, the blades rotate along with the shaft, and since the stress of the blades is continuously changed in a rotation period, especially the resistance of the blades in a backflow region is the largest, the output power of the turbine is reduced. Therefore, it is of great significance to research how to improve the hydrodynamic performance of the water turbine and ensure that the blades have larger lift force within the maximum opening range of the blades.
Disclosure of Invention
The utility model aims at providing a vertical axis trend can hydraulic turbine impeller with mobile curvilinear blade can effectively improve the stall characteristic of blade, weakens the vibration that is brought by the separation that flows to make the hydraulic turbine obtain bigger turning moment, improve the efficiency of the hydraulic turbine.
The utility model provides a, a vertical axis trend can hydraulic turbine impeller with mobile curvilinear blade, including evenly articulating at least three pairs of blades on the wheel hub circumference, every two blades to the blade set up respectively at the both ends of wheel hub diameter, and every two blades to the blade pass through the blade interlocking gear and connect, and the blade is whole to be arc structure and its trailing edge is wavy shape.
The utility model is also characterized in that,
the blade interlocking mechanism comprises a pin shaft seat fixed on the concave side surface of each blade, two blades of each pair of blades are connected with a connecting rod together, and two ends of each connecting rod are hinged to the pin shaft seats of the corresponding blades respectively.
The pin shaft seat is fixedly provided with a pin shaft, and two ends of the connecting rod are respectively hinged on the pin shafts of the corresponding blades.
The length h and the chord length c of the blade meet the requirement that h/c is more than 3 and less than 6.
The wave shape of the blade trailing edge satisfies a periodic cosine function f (z) ═ bcos (2 π z/λ), where the amplitude b is 0.06c and the wavelength λ is 0.24 c.
The front edge of the blade is arc-shaped.
The blades are provided with three pairs.
The beneficial effects of the utility model are that, the utility model discloses a set up the blade interlocking gear of vertical axis trend ability hydraulic turbine impeller, according to the gesture change of rivers blade, make the blade guarantee at adverse current region laminating wheel hub that the unilateral atress of blade has reduced the rotation resistance moment, make the hydraulic turbine obtain more trend energy to impeller blade trailing edge adopts cosine curve shape, the effectual stall characteristic that has improved the blade weakens the vibration that is brought by the flow separation, has improved the hydrodynamic performance of blade.
Drawings
Fig. 1 is a schematic structural view of a vertical axis tidal current energy water turbine impeller having movable curved blades according to the present invention;
fig. 2 is a schematic view of a connection structure of a pair of blades in a vertical axis tidal current energy water turbine impeller having movable curved blades according to the present invention;
fig. 3 is a schematic structural diagram of a blade in a vertical axis tidal current energy water turbine impeller with movable curved blades according to the present invention.
In the figure, 1 is a pin shaft seat, 2 is a blade, 3 is a hub, 4 is a connecting rod and 5 is a pin shaft.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model relates to a vertical axis trend can hydraulic turbine impeller with mobile curvilinear blade, as shown in figure 1, including evenly articulating at least three pairs of blade 2 on 3 circumferences of wheel hub, every two blades 2 to blade 2 set up respectively at the both ends of 3 diameters of wheel hub, and every two blades 2 to blade 2 pass through the blade interlocking gear to connect, and blade 2 wholly is the arc structure and its trailing edge is wavy shape.
The blade interlocking mechanism comprises a pin shaft seat 1 fixed on the concave side surface of each blade 2, two blades of each pair of blades 2 are connected with a connecting rod 4 together, and two ends of each connecting rod 4 are hinged on the pin shaft seats 1 of the corresponding blades 2 respectively.
The pin shaft seat 1 is fixedly provided with a pin shaft 5, and two ends of the connecting rod 4 are respectively hinged on the pin shafts 5 of the corresponding blades 2.
The length h and the chord length c of the blade 2 meet the conditions that h/c is more than 3 and less than 6, if NACA0018 is taken as a basic airfoil profile, the chord length c is taken as 100mm, and the length h of the blade is 400mm, the highest point of the chord length of the blade is cmax106mm, the lowest point of the chord length is cminThe chord length of the blade 2 at other positions is 106 < c which is 94mmz＜94。
The wave shape of the trailing edge of the blade 2 satisfies a periodic cosine function f (z) ═ bcos (2 π z/λ), where the amplitude b is 0.06c and the wavelength λ is 0.24 c.
The front edge of the blade 2 is arc-shaped.
The blades 2 are provided in three pairs.
The utility model relates to a vertical axis trend can hydraulic turbine impeller's theory of operation does with mobile curvilinear blade:
in the process of impeller rotation, the wave shape of the rear edge of the blade 2 shown in fig. 2 can delay increase of an airfoil attack angle, reduce flow separation on the surface of the airfoil, improve the hydrodynamic performance of the blade, reduce the wake flow of the blade, automatically adjust the posture change of the blade by arranging a blade interlocking mechanism of a vertical shaft tidal current energy water turbine impeller, and regulate the forward flow of the blade when the blade is opened above the impeller according to the difference of flow field incoming flow directions because the vertical shaft water turbine is suitable for bidirectional incoming flow, and the forward flow area is above the impeller and the reverse flow area is below the impeller. As shown in fig. 1, when the water turbine flows in the forward direction, the water turbine is in the shape of an impeller with incoming flow on the left side, and when the impeller rotates in the clockwise direction, blades in a downstream area are opened and erected, and concave surfaces of the blades are driven to rotate by the action force of the impact force of water flow; after the blades leave the forward flow area, the impact force of water flow on the concave surface gradually disappears, and the resistance of water flow on the convex surface gradually increases, so that the blades start to close and gradually fall to the impeller hub; when the blades are about to enter the reverse flow region, the blades are completely attached to the hub after completing the closing action, so that the resistance moment of the water flow borne by the impeller in the reverse flow region is minimum, the operation efficiency of the vertical shaft tidal current energy water turbine is improved, and the over-current performance of the water turbine is improved.
Claims (7)
1. The utility model provides a vertical axis tidal current energy hydraulic turbine impeller with movable curvilinear blade which characterized in that, includes and evenly articulates at least three pairs of blade (2) on wheel hub (3) circumference, and two blade (2) to each pair blade (2) set up respectively at the both ends of wheel hub (3) diameter, and just two blade (2) to each pair blade (2) are connected through blade interlocking gear, blade (2) are whole to be arc structure and its trailing edge is wave shape.
2. The vertical axis tidal current energy water turbine impeller with movable curvilinear blades as claimed in claim 1, wherein the blade interlocking mechanism comprises a pin shaft seat (1) fixed on the concave side of the blades (2), two blades of each pair of blades (2) are commonly connected with a connecting rod (4), and both ends of the connecting rod (4) are respectively hinged on the pin shaft seat (1) of the corresponding blade (2).
3. The vertical axis tidal current energy water turbine impeller with movable curved blades as claimed in claim 2, wherein the pin shaft seat (1) is fixedly provided with a pin shaft (5), and two ends of the connecting rod (4) are respectively hinged on the pin shaft (5) of the corresponding blade (2).
4. A vertical axis tidal current energy turbine impeller with movable curved blades according to any of claims 1 to 3, characterized in that the length h and the chord length c of the blades (2) satisfy 3< h/c < 6.
5. The vertical axis tidal current energy turbine impeller with movable curvilinear blades as claimed in claim 4, wherein the wave shape of the trailing edge of the blades (2) satisfies a periodic cosine function f (z) bcos (2 π z/λ), wherein the amplitude b is 0.06c and the wavelength λ is 0.24 c.
6. The vertical axis tidal current energy turbine impeller with movable curvilinear blades as claimed in claim 1, characterized in that the leading edge of the blades (2) is rounded.
7. A vertical axis tidal current energy turbine impeller with movable curvilinear blades as claimed in any of claims 1 to 3, characterized in that the blades (2) are provided in three pairs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921510659.6U CN210859025U (en) | 2019-09-11 | 2019-09-11 | Vertical shaft tidal current energy water turbine impeller with movable curve-shaped blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921510659.6U CN210859025U (en) | 2019-09-11 | 2019-09-11 | Vertical shaft tidal current energy water turbine impeller with movable curve-shaped blades |
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| CN210859025U true CN210859025U (en) | 2020-06-26 |
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| CN201921510659.6U Active CN210859025U (en) | 2019-09-11 | 2019-09-11 | Vertical shaft tidal current energy water turbine impeller with movable curve-shaped blades |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482843A (en) * | 2021-08-05 | 2021-10-08 | 大连理工大学 | Bionic wing-shaped vertical shaft water turbine power generation device |
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2019
- 2019-09-11 CN CN201921510659.6U patent/CN210859025U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482843A (en) * | 2021-08-05 | 2021-10-08 | 大连理工大学 | Bionic wing-shaped vertical shaft water turbine power generation device |
| CN113482843B (en) * | 2021-08-05 | 2022-08-05 | 大连理工大学 | Bionic wing-shaped vertical shaft water turbine power generation device |
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