CN102444528A - Water turbine enclosure - Google Patents
Water turbine enclosure Download PDFInfo
- Publication number
- CN102444528A CN102444528A CN2010102976585A CN201010297658A CN102444528A CN 102444528 A CN102444528 A CN 102444528A CN 2010102976585 A CN2010102976585 A CN 2010102976585A CN 201010297658 A CN201010297658 A CN 201010297658A CN 102444528 A CN102444528 A CN 102444528A
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- CN
- China
- Prior art keywords
- casing
- water turbine
- water
- enclosure
- cabinet cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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 discloses a water turbine enclosure, comprising an enclosure and an enclosure cover, wherein a backward jetting device is arranged on the enclosure cover, after a unit is disconnected, and the rotating speed is reduced to 35%, a gate valve is opened, high-pressure water flows are jet to a rotating wheel to brake, so as to shorten the stop time and protect the bearing safety; the gate valve is closed after machine halt.
Description
Technical field
The present invention relates to a kind of water turbine, especially a kind of water turbine casing belongs to the water conservancy equipment technical field.
Background technique
Water turbine is to be the transformation of energy of current the dynamic power machine of rotating mechanical energy.Modern water turbine great majority are installed in the water power plant, are used for driving generator for electricity generation.In the water power plant, the water in the upper pond is guided water turbine into through aqueduct, promotes the rotary wheel of water turbine rotation, drives generator for electricity generation.The water of finishing merit then passes through the tail water row of conduits downstream.Head is high more, flow is big more, and the output power of water turbine is also just big more.Reaction turbine is a kind of of water turbine, and it has obtained all over the world using widely with the energy conversion efficiency height.Various types of reaction turbines all are provided with water feed apparatus, and the water feed apparatus of large and medium-sized vertical shaft reaction turbine generally is made up of spiral case, fixed guide vane and movable guide vane.The effect of spiral case is to be evenly distributed to current around the runner.When head below 40 meters the time, the spiral case of water turbine reinforced concrete cast on-site commonly used forms; When head is higher than 40 meters, the then normal metal spiral case that adopts welding or block cast.In reaction turbine, current are full of whole runner channel, and all blade receives the effect of current simultaneously, so under same head, runner diameter is less than impulse turbine.Their peak efficiency also is higher than impulse turbine, but when load variations, the efficient of water turbine receives influence in various degree.Reaction turbine all is provided with draft tube, and its effect is: the kinetic energy that reclaims outlet of rotary wheel place current; Current row downstream; When the mounting point of runner was higher than the level of tail water, this potential energy is converted into pressure can be reclaimed.For the water turbine of the big flow of low water head, the outlet kinetic energy of runner is relatively large, and the recyclability of draft tube has appreciable impact to the efficient of water turbine.
Removal of load is a kind of common phenomena in the water power plant, and removal of load is exactly that unit is in operation and loses load suddenly.Because stator has little time to close rapidly, cause the rotating speed of unit and volute pressure to raise, the pressure of draft tube then reduces or degree of vacuum strengthens.Thereby the stability to equipment has produced very big destruction.
Summary of the invention
Technical problem to above-mentioned existence the objective of the invention is: proposed a kind of runner braking that after water turbine generation removal of load, can make very soon, shortened dead time, the device of protection bearing safety.
Technical solution of the present invention is achieved in that a kind of water turbine casing; Comprise casing and cabinet cover, it is characterized in that said cabinet cover is provided with the backward jet device; Said casing and generator shaft matching part are equipped with manger board, and said casing inner wall is provided with blowdown pipe.
Further, said casing and cabinet cover are welded-steel plate construction.
Advantage of the present invention is: on cabinet cover, be provided with the backward jet device.Behind unit trip, open gate valve during speed drop to 35%, dead time is shortened in the braking of high-pressure water flow directive runner, and protection bearing safety is shut down the back closing gate valve.Casing inner wall is provided with blowdown pipe, replenishes the air of being taken away by jet, prevents to produce parital vacuum in the casing, guarantees that current drainage is unimpeded.
Description of drawings
Below in conjunction with accompanying drawing technological scheme of the present invention is described further:
Fig. 1 is a water turbine casing schematic representation of the present invention.
Wherein: 1 casing; 2 cabinet cover; 3 backward jet devices; 4 injection pipes; 5 blowdown pipes; 6 manger boards.
Embodiment
Below in conjunction with accompanying drawing the present invention is described.
Water turbine casing as shown in Figure 1 comprises casing 1 and cabinet cover 2, and cabinet cover 2 is provided with backward jet device 3; Casing 1 is equipped with manger board 6 with the generator shaft matching part; Casing 1 inwall is provided with blowdown pipe 5, replenishes the air of being taken away by jet, prevents to produce in the casing parital vacuum; The assurance current drainage is unimpeded, and casing and cabinet cover are welded-steel plate construction.When removal of load took place, backward jet device controlled water flow penetrated from injection pipe, thereby gave reciprocal active force of runner.What we were provided with here is behind unit trip, opens gate valve during speed drop to 35%, and dead time is shortened in the braking of high-pressure water flow directive runner, and protection bearing safety is shut down the back closing gate valve.
The foregoing description only is explanation technical conceive of the present invention and characteristics; Its purpose is to let the personage that is familiar with this technology can understand content of the present invention and implements; Can not limit protection scope of the present invention with this; All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (2)
1. a water turbine casing comprises casing and cabinet cover, it is characterized in that, said cabinet cover is provided with the backward jet device; Said casing and generator shaft matching part are equipped with manger board; Said casing inner wall is provided with blowdown pipe.
2. according to the described water turbine casing of claim, it is characterized in that said casing and cabinet cover are welded-steel plate construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102976585A CN102444528A (en) | 2010-09-30 | 2010-09-30 | Water turbine enclosure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102976585A CN102444528A (en) | 2010-09-30 | 2010-09-30 | Water turbine enclosure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102444528A true CN102444528A (en) | 2012-05-09 |
Family
ID=46007369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102976585A Pending CN102444528A (en) | 2010-09-30 | 2010-09-30 | Water turbine enclosure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102444528A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412103A (en) * | 2020-04-01 | 2020-07-14 | 浙江富春江水电设备有限公司 | Braking method for runner of impact type hydraulic generator |
-
2010
- 2010-09-30 CN CN2010102976585A patent/CN102444528A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412103A (en) * | 2020-04-01 | 2020-07-14 | 浙江富春江水电设备有限公司 | Braking method for runner of impact type hydraulic generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120509 |