CN201786536U - Water turbine casing - Google Patents
Water turbine casing Download PDFInfo
- Publication number
- CN201786536U CN201786536U CN2010205152489U CN201020515248U CN201786536U CN 201786536 U CN201786536 U CN 201786536U CN 2010205152489 U CN2010205152489 U CN 2010205152489U CN 201020515248 U CN201020515248 U CN 201020515248U CN 201786536 U CN201786536 U CN 201786536U
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- CN
- China
- Prior art keywords
- casing
- water turbine
- gate valve
- water
- jet device
- 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.)
- Expired - Fee Related
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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 utility model discloses a water turbine casing, which comprises a casing and a casing cover, wherein the casing cover is provided with a reverse jet device. When a unit is disconnected, a gate valve is opened when the rotating speed reduces to 35 percent, and high pressure water flow is jetted to a rotating wheel to brake, thereby reducing the downtime, protecting safety of a bearing, and closing the gate valve after shutting down. The solution is that the casing cover is provided with the reverse jet device. When the unit is disconnected, the gate valve is opened when the rotating speed reduces to 35 percent, and high pressure water flow is jetted to a rotating wheel to brake, thereby reducing the downtime, protecting safety of a bearing, and closing the gate valve after shutting down. The inner wall of the casing is provided with an air supply pipe which supplies air brought by jet flow, thereby preventing from generating partial vacuum in the casing, and guaranteeing draining to be smooth.
Description
Technical field
The utility model relates to a kind of water turbine casing, belongs to the hydro-electric power generating 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 that current are evenly distributed to 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 is subjected to 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 is subjected to 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.
The model utility content
The utility model purpose is at the deficiencies in the prior art, and a kind of runner braking that can make very soon after water turbine generation removal of load is provided, and shortens dead time and protects the water turbine casing of bearing safety.
For achieving the above object, the technical solution of the utility model is:
A kind of water turbine casing comprises casing and cabinet cover, and described cabinet cover is provided with the backward jet device.Described casing and generator shaft matching part are equipped with manger board, and casing inner wall is provided with blowdown pipe.
Preferably, described casing and cabinet cover are welded-steel plate construction.
The utility model has the advantages that:
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
Fig. 1 is a structural representation of the present utility model.
Wherein: 1, casing; 2, cabinet cover; 3, backward jet device; 4, injection pipe; 5, blowdown pipe; 6, manger board.
Embodiment
Water turbine casing as shown in Figure 1 comprises casing 1, cabinet cover 2, injection pipe 4; Injection pipe 4 is arranged on the top of casing 1; Cabinet cover 2 is provided with backward jet device 3, and casing 1 is equipped with manger board 6 with the generator shaft matching part, and casing 1 inwall is provided with blowdown pipe 5, replenish the air of being taken away by jet, prevent to produce parital vacuum in the casing, guarantee that current drainage is unimpeded, 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.
Above embodiment only is the utility model a kind of mode of execution wherein, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, all belong to protection domain of the present utility model.
Claims (2)
1. a water turbine casing comprises casing and cabinet cover, it is characterized in that, described cabinet cover is provided with the backward jet device, and described casing and generator shaft matching part are equipped with manger board, and casing inner wall is provided with blowdown pipe.
2. water turbine casing according to claim 1 is characterized in that described casing and cabinet cover are welded-steel plate construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205152489U CN201786536U (en) | 2010-09-03 | 2010-09-03 | Water turbine casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205152489U CN201786536U (en) | 2010-09-03 | 2010-09-03 | Water turbine casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201786536U true CN201786536U (en) | 2011-04-06 |
Family
ID=43818500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205152489U Expired - Fee Related CN201786536U (en) | 2010-09-03 | 2010-09-03 | Water turbine casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201786536U (en) |
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2010
- 2010-09-03 CN CN2010205152489U patent/CN201786536U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110406 Termination date: 20110903 |