CN103114952A - Axial-flow type water turbine inner skirt blade rotary wheel - Google Patents
Axial-flow type water turbine inner skirt blade rotary wheel Download PDFInfo
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- CN103114952A CN103114952A CN2012105246511A CN201210524651A CN103114952A CN 103114952 A CN103114952 A CN 103114952A CN 2012105246511 A CN2012105246511 A CN 2012105246511A CN 201210524651 A CN201210524651 A CN 201210524651A CN 103114952 A CN103114952 A CN 103114952A
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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 invention relates to an axial-flow type water turbine inner skirt blade rotary wheel. The axial-flow type water turbine inner skirt blade rotary wheel comprises a curved blade and a ball-shaped pivot which connects the curved blade and the hub body, and a small gap is arranged between the hub body and the curved blade. A backpressure face of the curved blade is closed to the hub body, and a skirt with a small gap exists between the curved blade and the hub body. An effect of inhibiting gap cavitation from appearing on the surface of the blade can be achieved by increasing the skirt of one side of the blade backpressure face hub body. The axial-flow type water turbine inner skirt blade rotary wheel can prevent the blade from being damaged by gap caviation on the portion of the blade, and the portion of the blade is close to the hub body. The axial-flow type water turbine inner skirt blade rotary wheel can reduce cavitation abrasion of the blade surface, improves anti-cavitation ability of the blade and improves security and stability of operation.
Description
Technical field:
The present invention relates to a kind of axial flow hydraulic turbine inner skirt blade rotary wheel.
Technical background:
liquid take water as medium flows the some areas of flowing through at a certain temperature, when pressure during lower than certain critical value, the very little bubble that water body inside was contained originally will expand rapidly, form the obvious bubble that contains water vapour or other gas in water, this because the pressure reduction is called the process of water vapor " cavitation ", the cavity that current are being carried under one's arms is when higher regional of the downstream pressure of flowing through, cavity will expand, finally crumble and fall, can cause the cavitation erosion of flow passage components in water turbine cavitation phenomenon, its consequence is mainly to cause that the water turbine water-power performance parameter worsens, mechanical vibration and noise, and then affect the safe operation of water turbine.
the Turbine Cavitation Testing phenomenon is divided into the aerofoil profile cavitation by the position that cavitation occurs with it, clearance cavitation, cavity cavitation and local cavitation etc., for the cavitation phenomenon that occurs near the blade near zone of hub body, it may be the aerofoil profile cavitation that is caused by the vane airfoil profile geometrical shape, it may be also the clearance cavitation that causes by narrow gap between blade inner edge and hub body due to current, the aerofoil profile cavitation generally can reduce even to eliminate the possibility of its generation through repeated multiple times adjustment vane airfoil profile in the rotor design stage, but the gap between blade inner edge and hub body is the inherent characteristics of axial-flow Kaplan water turbine, the clearance cavitation that is caused by it not only can appear on web, also might be developed on blade, blade is produced destroy.
Summary of the invention:
The purpose of patent of the present invention is to disclose a kind of clearance cavitation that at utmost reduces to the cavitation wearing and tearing of blades for axial-flow water turbine, extends blade working life, improves the blades for axial-flow water turbine of operation stability.technological scheme of the present invention is: the present invention is a kind of axial flow hydraulic turbine inner skirt blade rotary wheel, comprise the connection curved surface bucket, spheric pivot, wheel hub, wheel rim, the shirt rim, blade has 4 peripheries, it is respectively blade water inlet limit, blade outlet, near the blade outside of wheel rim and the blade inboard of close wheel hub, connect between curved surface bucket and wheel hub very little gap is arranged, curved surface bucket back pressure face also and between wheel hub has very little gap near wheel hub, shirt rim leading edge A point when blade complete shut-down state near last blade outlet and be positioned at last blade outlet after, shirt rim trailing edge B point is when blade complete shut-down state near a rear blade water inlet limit and after being positioned at before a blade water inlet limit, between the C point of shirt rim and the D point of shirt rim, curve shape and blade are consistent near the molded line of the back pressure face of hub side, the shirt rim is at the E point, F point place and spheric pivot smooth transition.
Working principle of the present invention is: water turbine is that the transformation of energy with current is the device of mechanical energy.Reaction turbine has utilized potential energy and the kinetic energy of current.Current are full of the runner of whole water turbine, and whole runner is that the press seal closed system is arranged, and current are that pressure flow is moving, and current are along the water inlet of runner cylindrical complete cycle, reduce gradually from the foreign paper outlet water flow pressure of runner.The water impact turbine runner blade, its inertial force effect causes the power that acts on blade, conversely, blade changes speed (direction or size), the pressure of current.
The main position that patent of the present invention relates to is that runner bucket back pressure face is near the position of hub body; reach by the shirt rim that increases blade back pressure surface hub body one side and suppress the effect that clearance cavitation occurs at blade surface; thereby the destruction that the protection blade is not subjected to clearance cavitation at the position near hub body keeps vane airfoil profile constant.
The present invention can make axial flow hydraulic turbine benefit in the following areas:
(1) reduce the turbine blade wearing and tearing
Increase the shirt rim in blade back pressure surface hub body one side, can suppress the clearance cavitation that produces by narrow gap between blade inner edge and hub body due to current in the generation of blade surface, thereby reduce the cavitation corrosion wearing and tearing of blade surface, improve the anti-cavitation ability of blade, improve Operation safety and stability.
(2) reduce blade and repair the position
After having increased the shirt rim, because clearance cavitation can not appear on blade surface again, therefore the cavitation corrosion that is caused by clearance cavitation only damages skirt border structure, can not cause wearing and tearing to blade surface, only need repair the blade shirt rim during reblading, reduce the position that blade is repaired, reduced the difficulty of repairing.
Description of drawings:
Fig. 1 axial flow hydraulic turbine inner skirt blade rotary wheel erection drawing
Fig. 2 axial flow hydraulic turbine inner skirt blade rotary wheel plan view
Fig. 3 axial flow hydraulic turbine inner skirt blade rotary wheel side view
Embodiment:
as Fig. 1, shown in Figure 2, a kind of clearance cavitation that at utmost reduces is to the cavitation wearing and tearing of blades for axial-flow water turbine, extend blade working life, improve the blades for axial-flow water turbine of operation stability, comprise and connect curved surface bucket 1, spheric pivot 2, wheel hub 3, wheel rim 4, shirt rim 5, blade 1 has 4 peripheries, it is respectively blade water inlet limit 6, blade outlet 7, near the blade of wheel rim 4 outside 8 and near the blade inboard 9 of wheel hub 3, connect between curved surface bucket 1 and wheel hub 3 very little gap is arranged, curved surface bucket 1 back pressure face near wheel hub 3 and and wheel hub 3 between very little gap is arranged.
The definition of blade related point and feature thereof be as shown in Figure 2 and Figure 3: some A be the tie point near blade water inlet limit 6 side shirt edges 5 and blade 1, point B is near the tie point of blade outlet 7 side shirt edges 5 with blade 1, point C is the end points of close blade water inlet limit 6 sides on shirt rim 5, point D is the end points of close blade outlet 7 sides on shirt rim 5, point E be that some F be the shirt rim 5 of close blade outlet 7 sides and the tie point of pivot 2 near the shirt rim 5 of blade water inlet limit 6 sides and the tie point of pivot 2.
As shown in Figure 2 and Figure 3, the leading edge A point of shirt rim 5 when blade complete shut-down state near last blade outlet 7 and be positioned at last blade outlet 7 after, the trailing edge B point of shirt rim 5 is when blade complete shut-down state near a rear blade water inlet limit 6 and after being positioned at before a blade water inlet limit 6, between the C point of shirt rim 5 and the D point of shirt rim 5, curve shape and blade 1 are consistent near the molded line of the back pressure face of wheel hub 3 sides, and shirt rim 5 is in E point, F point place and spheric pivot 2 smooth transition.
Claims (1)
1. axial flow hydraulic turbine inner skirt blade rotary wheel, it is characterized in that: comprise connecting curved surface bucket (1), spheric pivot (2), wheel hub (3), wheel rim (4), shirt rim (5), blade (1) has 4 peripheries, it is respectively blade water inlet limit (6), blade outlet (7), near the blade outside (8) of wheel rim (4) and the blade inboard (9) of close wheel hub (3), connect between curved surface bucket (1) and wheel hub (3) very little gap is arranged, curved surface bucket (1) back pressure face near wheel hub (3) and and wheel hub (3) between very little gap is arranged, shirt rim (5) leading edge A point when blade complete shut-down state near last blade outlet (7) and be positioned at last blade outlet (7) afterwards, a blade water inlet limit (6) is before near a rear blade water inlet limit (6) and after being positioned at when blade complete shut-down state for shirt rim (5) trailing edge B point, between the C point of shirt rim (5) and the D point of shirt rim (5), curve shape and blade (1) are consistent near the molded line of the back pressure face of wheel hub (3) side, shirt rim (5) is at the E point, F point place and spheric pivot (2) smooth transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105246511A CN103114952A (en) | 2012-12-07 | 2012-12-07 | Axial-flow type water turbine inner skirt blade rotary wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105246511A CN103114952A (en) | 2012-12-07 | 2012-12-07 | Axial-flow type water turbine inner skirt blade rotary wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103114952A true CN103114952A (en) | 2013-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2012105246511A Pending CN103114952A (en) | 2012-12-07 | 2012-12-07 | Axial-flow type water turbine inner skirt blade rotary wheel |
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| CN (1) | CN103114952A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107850036A (en) * | 2015-03-20 | 2018-03-27 | 株式会社铃诗苑 | Propeller rotor |
| CN111706454A (en) * | 2020-06-03 | 2020-09-25 | 浙江富春江水电设备有限公司 | Passive blade anti-cavitation structure for axial-flow Kaplan turbine |
| CN111997812A (en) * | 2020-08-20 | 2020-11-27 | 浙江富春江水电设备有限公司 | Anti cavitation erosion structure of blade of Kaplan turbine |
| DE102022114339B3 (en) | 2022-06-08 | 2023-06-01 | Voith Patent Gmbh | Turbine with swiveling rotor blades |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090092496A1 (en) * | 2007-10-05 | 2009-04-09 | Benoit Des Roches | Axial flow hydraulic turbine with blade mounting |
| CN201963454U (en) * | 2011-02-28 | 2011-09-07 | 重庆云河水电股份有限公司 | Operation mechanism of four-blade paddle |
| CN202194767U (en) * | 2011-07-01 | 2012-04-18 | 哈尔滨电机厂有限责任公司 | Novel rotating wheel of axial-flow hydraulic turbine |
| CN202483781U (en) * | 2011-11-17 | 2012-10-10 | 东方电气集团东方电机有限公司 | Water turbine rotating wheel supporting device |
-
2012
- 2012-12-07 CN CN2012105246511A patent/CN103114952A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090092496A1 (en) * | 2007-10-05 | 2009-04-09 | Benoit Des Roches | Axial flow hydraulic turbine with blade mounting |
| CN201963454U (en) * | 2011-02-28 | 2011-09-07 | 重庆云河水电股份有限公司 | Operation mechanism of four-blade paddle |
| CN202194767U (en) * | 2011-07-01 | 2012-04-18 | 哈尔滨电机厂有限责任公司 | Novel rotating wheel of axial-flow hydraulic turbine |
| CN202483781U (en) * | 2011-11-17 | 2012-10-10 | 东方电气集团东方电机有限公司 | Water turbine rotating wheel supporting device |
Non-Patent Citations (1)
| Title |
|---|
| 覃大清等: "轴流式水轮机间隙空化与翼型空化差别浅谈", 《大电机技术》, no. 02, 25 March 2012 (2012-03-25), pages 34 - 37 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107850036A (en) * | 2015-03-20 | 2018-03-27 | 株式会社铃诗苑 | Propeller rotor |
| CN107850036B (en) * | 2015-03-20 | 2021-03-09 | Ntn株式会社 | Propeller rotor |
| CN111706454A (en) * | 2020-06-03 | 2020-09-25 | 浙江富春江水电设备有限公司 | Passive blade anti-cavitation structure for axial-flow Kaplan turbine |
| CN111706454B (en) * | 2020-06-03 | 2021-08-17 | 浙江富春江水电设备有限公司 | Passive blade anti-cavitation structure for axial-flow Kaplan turbine |
| CN111997812A (en) * | 2020-08-20 | 2020-11-27 | 浙江富春江水电设备有限公司 | Anti cavitation erosion structure of blade of Kaplan turbine |
| DE102022114339B3 (en) | 2022-06-08 | 2023-06-01 | Voith Patent Gmbh | Turbine with swiveling rotor blades |
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Application publication date: 20130522 |