CN117685147A - Water turbine runner blade with novel guide plate and water turbine runner - Google Patents
Water turbine runner blade with novel guide plate and water turbine runner Download PDFInfo
- Publication number
- CN117685147A CN117685147A CN202311708429.1A CN202311708429A CN117685147A CN 117685147 A CN117685147 A CN 117685147A CN 202311708429 A CN202311708429 A CN 202311708429A CN 117685147 A CN117685147 A CN 117685147A
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- guide plate
- runner blade
- runner
- blade body
- turbine runner
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 230000000694 effects Effects 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract description 5
- 230000010349 pulsation Effects 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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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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- Hydraulic Turbines (AREA)
Abstract
The invention belongs to the technical field of fluid mechanical equipment, and particularly relates to a turbine runner blade with a novel guide plate and a turbine runner. The invention at least comprises a runner blade body; the device also comprises a guide plate; the plurality of guide plates are parallel and are vertically and fixedly connected to the two surfaces of the runner blade body at equal intervals, and the guide plates on the two surfaces are correspondingly arranged; the axial direction of the deflector is arranged along the water flow direction. The invention weakens the impact trend of water flow on two surfaces of the runner blade body of the water turbine on the runner blade body of the water turbine, so that the flow velocity of fluid entering the runner is more uniform, the amplitude of pressure dip is reduced, a certain optimizing effect is provided for the flow field between two adjacent runner blade bodies of the water turbine, the vortex in the runner is broken, the cavitation occurrence probability is reduced, the viscous resistance and Reynolds stress around the blades are reduced, and the occurrence of flow separation is slowed down.
Description
Technical Field
The invention belongs to the technical field of fluid mechanical equipment, and particularly relates to a turbine runner blade with a novel guide plate and a turbine runner.
Background
At present, the water turbine has wide application, and the hydraulic stability of the water turbine is also receiving more and more attention.
When the water turbine is used, if the water flow entering the water turbine runner loses axisymmetry, unbalanced radial force is necessarily generated, hydraulic imbalance is caused, and vibration of the water turbine is probably caused. Particularly, under the working condition of large flow, the rated rotation speed of the water turbine is high, the flow velocity in the overflow part is high, the impact force of water flow on the runner blades is extremely large, and the problems of unit vibration, sharp reduction of efficiency, cavitation erosion damage, blade cracks and the like are caused by unstable water flow. For example, when the turbine is operated under non-optimal conditions, the rotating runner outlet water flow may form a vortex band in the draft tube, causing pressure pulsations, causing the unit to vibrate. The pressure pulsation inevitably causes vibration of a draft tube, a pressure steel tube, a top cover, a thrust bearing and the like, and also causes output fluctuation of the water turbine, under serious conditions, resonance of a water diversion pipeline and factory vibration are possibly caused, and the safe operation of the hydropower station is seriously influenced.
Disclosure of Invention
The invention provides a turbine runner blade with a novel guide plate, and aims to provide a device capable of improving water flow, reducing impact force of water flow on the blade, reducing pressure pulsation and weakening vortex belt generation.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a turbine runner blade with a novel guide plate at least comprises a runner blade body; the device also comprises a guide plate; the plurality of guide plates are arranged, the plurality of guide plates are parallel and are vertically and fixedly connected to the two surfaces of the runner blade body at equal intervals, and the guide plates on the two surfaces are correspondingly arranged; the axis direction of the guide plate is arranged along the water flow direction.
The height of the guide plate is equal to the thickness of the runner blade body.
The ratio of the distance from the water inlet end of the guide plate to the edge of the water inlet side of the runner blade body to the length of the guide plate is 1:8.
The ratio of the distance from the water outlet end of the guide plate to the edge of the water outlet side of the runner blade body to the length of the guide plate is 1:8.
The ratio of the distance L1 between the guide plate close to the inner side of the rotating wheel blade body and the edge of the inner side of the rotating wheel blade body to the distance L2 between the adjacent guide plates to the distance L3 between the guide plate close to the outer side of the rotating wheel blade body and the edge of the outer side of the rotating wheel blade body is 1:4:1.
The guide plate is arranged in parallel with the outer edge of the runner blade body.
The number of the guide plates is 3.
The turbine runner at least comprises a runner body and turbine runner blades with novel guide plates; the turbine runner blade with the novel guide plate is provided with a plurality of turbine runner blades, and the turbine runner blades with the novel guide plate are uniformly connected to the outer side wall of the runner body.
The turbine runner blade with the novel guide plate is provided with six.
The beneficial effects are that:
(1) According to the invention, the plurality of guide plate structures are arranged on the runner blades, so that water flows enter along the water inlet side of the runner blade of the water turbine, the water flows are separated by each guide plate and flow out along the guide plates, and finally flow out along the water outlet side of the runner blade of the water turbine, and the guide plates weaken the impact trend of the water flows on the two surfaces of the runner blade of the water turbine on the runner blade of the water turbine.
(2) The invention makes the flow velocity of fluid entering the flow channel more uniform, and reduces the amplitude of pressure dip.
(3) The structure of the guide plate has a certain optimizing effect on the flow field between two adjacent blades, breaks the vortex in the flow channel, reduces the probability of cavitation, and reduces the viscous resistance and Reynolds stress around the blades.
(4) The arrangement of the guide plate in the invention slows down the occurrence of flow separation.
The foregoing description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention more clearly understood, it can be implemented according to the content of the specification, and the following detailed description of the preferred embodiments of the present invention will be given with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a top view of the present invention.
FIG. 3 is a schematic view of a specific distribution of baffles in the present invention.
In the figure: 1. a rotor blade body; 2. a deflector; 3. a rotating wheel body.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
according to the water turbine runner blade with the novel guide plate shown in fig. 1-3, at least the runner blade body 1 is included; also comprises a deflector 2; the plurality of guide plates 2 are arranged, the plurality of guide plates 2 are parallel and are vertically and fixedly connected to the two surfaces of the runner blade body 1 at equal intervals, and the guide plates 2 on the two surfaces are correspondingly arranged; the axial direction of the deflector 2 is arranged along the water flow direction.
In actual use, the water flow enters along the water inlet side of the turbine runner blade body 1 by arranging the plurality of guide plates 2 on the runner blade, the water flow is separated by each guide plate 2, flows out along the guide plates 2, and finally flows out from the water outlet side of the turbine runner blade body 1. The arrangement of the guide plate 2 weakens the impact trend of water flow on two surfaces of the runner blade body 1 of the water turbine on the runner blade body 1, so that the flow velocity of fluid entering the runner is more uniform, and the amplitude of pressure dip is reduced.
The arrangement of the guide plate 2 has a certain optimizing effect on the water flow field between two adjacent blades, breaks the vortex in the flow channel, reduces the probability of cavitation, and reduces the viscous resistance and the Reynolds stress around the blades.
The arrangement of the deflector 2 in the invention also slows down the occurrence of stall.
Embodiment two:
a turbine runner blade with a novel baffle according to fig. 1-3 differs from the embodiment in that: the height of the guide plate 2 is equal to the thickness of the runner blade body 1.
When in actual use, after the water flow flows into the runner through the guide vane, she Daoguo and She Daoguo with different sizes are easily formed at the position of the runner blade body 1, so that the occurrence of cavitation erosion phenomenon is easily caused, and the technical scheme that the height of the guide plate 2 is equal to the thickness of the runner blade body 1 is adopted, so that vortex can be effectively broken, internal reflux is weakened, the flow-off of the tail part of the runner blade is reduced, the flow velocity inside the runner is more uniform, and the flow state is smoother.
Embodiment III:
a turbine runner blade with a novel baffle according to fig. 1-3 differs from the first or second embodiments in that: the ratio of the distance from the water inlet end of the guide plate 2 to the water inlet side edge of the runner blade body 1 to the length of the guide plate 2 is 1:8.
Further, the ratio of the distance from the water outlet end of the guide plate 2 to the water outlet side edge of the runner blade body 1 to the length of the guide plate 2 is 1:8.
When in actual use, by adopting the technical scheme, the water flow is not easy to generate cavitation bubbles caused by vortex at the inflow position of the guide plate 2, so that the subsequent flow state is stable, and meanwhile, the flow state disorder caused by the difficult formation of flow separation at the water outlet side of the guide plate 2 and the water outlet side of the runner blade body 1 can be realized, and the effect of stabilizing the flow state can be achieved.
Embodiment four:
a turbine runner blade with a novel baffle according to fig. 1-3 differs from the first or second embodiments in that: the ratio of the distance L1 between the guide plate 2 close to the inner side of the runner blade body 1 and the edge of the inner side of the runner blade body 1, the distance L2 between the adjacent guide plates 2, and the distance L3 between the guide plate 2 close to the outer side of the runner blade body 1 and the edge of the outer side of the runner blade body 1 is 1:4:1.
When in actual use, the adoption of the technical scheme can reduce the head loss coefficient under the operating condition, alleviate the shape change of the flow state in the blade, improve the flow state of water flow and greatly reduce the head loss, thereby achieving the purpose of improving the efficiency of the unit.
Fifth embodiment:
a turbine runner blade with a novel baffle according to fig. 1-3 differs from the embodiment in that: the guide plate 2 is arranged in parallel with the outer edge of the runner blade body 1.
When in actual use, the guide plate 2 is parallel to the outer edge of the runner blade body 1, so that the flow state can flow stably as much as possible on the premise of not disturbing the internal flow field, the water body backflow condition on the surface of the runner blade body 1 is reduced, obvious vortex is reduced, the flow state of water flow is smoother, and the flow speed is more uniform.
Example six:
a turbine runner blade with a novel baffle according to fig. 1-3 differs from the embodiment in that: the number of the guide plates 2 is 3.
When in actual use, the guide plates 2 are arranged in 3, so that the impact trend of water flow interaction on two sides of the runner blade body 1 can be weakened by the guide plates 2, the flow is more uniform and stable, the vibration of a machine set and the possibility of vortex flow are reduced, the cost is saved, and the weight of the runner blade body 1 is reduced.
Embodiment seven:
a turbine runner blade with a novel baffle according to fig. 1-3 differs from the embodiment in that: 3 guide plates 2 are arranged; the height of the guide plate 2 is equal to the thickness of the runner blade body 1; the ratio of the distance from the water inlet end of the guide plate 2 to the water inlet side edge of the runner blade body 1 to the length of the guide plate 2 is 1:8; the ratio of the distance from the water outlet end of the guide plate 2 to the edge of the water outlet side of the runner blade body 1 to the length of the guide plate 2 is 1:8; the ratio of the distance L1 between the guide plate 2 close to the inner side of the runner blade body 1 and the edge of the inner side of the runner blade body 1, the distance L2 between the adjacent guide plates 2 and the distance L3 between the guide plate 2 close to the outer side of the runner blade body 1 and the edge of the outer side of the runner blade body 1 is 1:4:1; the guide plate 2 is arranged in parallel with the outer edge of the runner blade body 1.
In actual use, the multiple guide plates 2 are arranged on the runner blade body 1, so that water flows enter along the water inlet side of the runner blade body 1 of the water turbine, the water flows are separated by each guide plate 2, flow flows out along the guide plates 2 and finally flows out from the water outlet side of the runner blade body 1 of the water turbine, the impact trend of the water flows on the two surfaces of the runner blade body 1 of the water turbine on the runner blade body 1 of the water turbine is weakened by the guide plates 2, the flow rate of the fluid entering the runner is more uniform, and the amplitude of pressure dip is reduced.
The arrangement of the guide plate 2 has a certain optimizing effect on the flow field between two adjacent turbine runner blade bodies 1, breaks the vortex in the flow channel, reduces the probability of cavitation occurrence, and reduces the viscous resistance and the Reynolds stress around the blades. The arrangement of the guide plate 2 in the invention slows down the occurrence of the flow separation.
In specific application, the number of the guide plates 2 arranged on each turbine runner blade body 1 can be determined according to the design parameters of the actual turbine.
Example eight:
according to the water turbine runner shown in fig. 1-3, at least comprising a runner body 3, and further comprising a water turbine runner blade with a novel deflector; the turbine runner blade with the novel guide plate is provided with a plurality of turbine runner blades with the novel guide plate and is uniformly connected to the outer side wall of the runner body 3.
When in actual use, the water turbine runner blades with the novel guide plates are connected to the runner body 3, water flows enter along the water inlet side of the water turbine runner blade body 1, the water flows are separated by each guide plate 2, and finally flow out along the guide plates 2, and finally flow out along the water outlet side of the water turbine runner blade body 1, so that the impact trend of the water flows on the two surfaces of the water turbine runner blade body 1 to the water turbine runner blade body 1 is greatly weakened, the flow velocity in the fluid inlet runner is more uniform, the amplitude of pressure dip is reduced, a certain optimizing effect is provided for the flow field between two adjacent water turbine runner blade bodies 1, the vortex in the runner is broken, the cavitation occurrence probability is reduced, the viscous resistance and the Reynolds stress around the blades are reduced, and the occurrence of flow separation is slowed down.
Example ten:
a turbine runner according to the one shown in fig. 1 and 2 differs from the ninth embodiment in that: the turbine runner blade with the novel guide plate is provided with six.
When in actual use, the number of the turbine runner blades is six, so that water flow entering the turbine runner can be axisymmetric, and balanced radial force is obtained, thereby balancing water power and avoiding the vibration of the turbine.
Under the condition of no conflict, the technical features related to the examples can be combined with each other according to actual situations by a person skilled in the art so as to achieve corresponding technical effects, and specific details of the combination situations are not described in detail herein.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
While the invention is susceptible of embodiments in accordance with the preferred embodiments, the invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (9)
1. A turbine runner blade with a novel guide plate at least comprises a runner blade body (1); the method is characterized in that: also comprises a deflector (2); the plurality of guide plates (2) are arranged, the plurality of guide plates (2) are parallel and are vertically and fixedly connected to the two surfaces of the runner blade body (1) at equal intervals, and the guide plates (2) on the two surfaces are correspondingly arranged; the axial direction of the guide plate (2) is arranged along the water flow direction.
2. A turbine runner blade having a novel baffle as claimed in claim 1 wherein: the height of the guide plate (2) is equal to the thickness of the runner blade body (1).
3. A turbine runner blade having a novel baffle as claimed in claim 1 or claim 2 wherein: the ratio of the distance from the water inlet end of the guide plate (2) to the edge of the water inlet side of the runner blade body (1) to the length of the guide plate (2) is 1:8.
4. A turbine runner blade having a novel baffle as claimed in claim 1 or claim 2 wherein: the ratio of the distance from the water outlet end of the guide plate (2) to the edge of the water outlet side of the runner blade body (1) to the length of the guide plate (2) is 1:8.
5. A turbine runner blade having a novel baffle as claimed in claim 1 or claim 2 wherein: the ratio of the distance L1 between the guide plate (2) close to the inner side of the rotating wheel blade body (1) and the inner side edge of the rotating wheel blade body (1), the distance L2 between the adjacent guide plates (2) and the distance L3 between the guide plate (2) close to the outer side of the rotating wheel blade body (1) and the outer side edge of the rotating wheel blade body (1) is 1:4:1.
6. A turbine runner blade having a novel baffle as claimed in claim 1 wherein: the guide plate (2) is arranged in parallel with the outer edge of the runner blade body (1).
7. A turbine runner blade having a novel baffle as claimed in claim 1 wherein: the number of the guide plates (2) is 3.
8. A turbine runner, comprising at least a runner body (3), characterized in that: further comprising a turbine runner blade with a novel deflector as claimed in any one of claims 1 to 7; the turbine runner blade with the novel guide plate is provided with a plurality of turbine runner blades with the novel guide plate and is uniformly connected to the outer side wall of the runner body (3).
9. A turbine runner blade having a novel baffle as set forth in claim 8 wherein: the turbine runner blade with the novel guide plate is provided with six.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311708429.1A CN117685147A (en) | 2023-12-12 | 2023-12-12 | Water turbine runner blade with novel guide plate and water turbine runner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311708429.1A CN117685147A (en) | 2023-12-12 | 2023-12-12 | Water turbine runner blade with novel guide plate and water turbine runner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117685147A true CN117685147A (en) | 2024-03-12 |
Family
ID=90138626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311708429.1A Pending CN117685147A (en) | 2023-12-12 | 2023-12-12 | Water turbine runner blade with novel guide plate and water turbine runner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117685147A (en) |
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2023
- 2023-12-12 CN CN202311708429.1A patent/CN117685147A/en active Pending
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