CN206972311U - A kind of nozzle of steam turbine group - Google Patents
A kind of nozzle of steam turbine group Download PDFInfo
- Publication number
- CN206972311U CN206972311U CN201720745063.9U CN201720745063U CN206972311U CN 206972311 U CN206972311 U CN 206972311U CN 201720745063 U CN201720745063 U CN 201720745063U CN 206972311 U CN206972311 U CN 206972311U
- Authority
- CN
- China
- Prior art keywords
- valve
- steam
- piston
- diversion cavity
- nozzle
- 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.)
- Active
Links
Landscapes
- Control Of Turbines (AREA)
Abstract
The utility model discloses a kind of nozzle of steam turbine group, including outer cylinder seat, be arranged at the vaporium of outer cylinder seat upper interior, be arranged at vaporium above and internal empty and for importing the steam cover of steam；Steam chamber is divided into multiple independent jet chamber, and each jet chamber upper end is provided with valve plate, and the valve opening for penetrating valve plate is provided with every piece of valve plate, and the valve rod piston of independent work is embedded with each valve opening.Pass through the change automatic regulating valve column piston of steam pressure and the matching relationship of valve opening, so that all jet chamber can lead vapour in a low voltage state, only have part jet chamber to lead vapour under mesohigh state, so as to realized in same nozzle sets warm cylinder effect under low-pressure state and reduce from low-pressure state be transitioned into mesohigh state when restriction loss.
Description
Technical field
It the utility model is related to steam turbine field, and in particular to a kind of nozzle of steam turbine group.
Background technology
Steam turbine is the rotary power machinery that the energy conversion of steam is turned into mechanical work.Nozzle sets are in steam turbine
Main function is the guide functions that make steam by nozzle sets on the blade of rotor perisporium.
The mode of Steam Turhine Adjustment throttle flow generally has throttling to match somebody with somebody vapour and nozzle governing two ways, and throttling refers to institute with vapour
There is valve while open, aperture is identical, and the steam pressure after valve is identical, and throttling deviates declared working condition operation with vapour in steam turbine
When valve aperture can diminish, produce bigger restriction loss, reduce unit efficiency.Nozzle governing refers to match somebody with somebody vapour side herein
Regulating valve is opened successively under formula, and according to the difference of power of the assembling unit requirement, throttle flow can change, thus the quantity of valve opening is just not
It is the same.Nozzle governing generally has a point of single valve and sequence valve, the generally use single valve in low pressure, warming-up effect when single valve
Very well, because several pitch apertures are identical, surrounding throttle flow is similar when steam turbine enters vapour, but in high pressure conditions, it is single
The restriction loss of valve is serious；When using sequence valve under high pressure, valve opening difference can reduce restriction loss, but sequence valve is being transported
The warm cylinder of row early stage is ineffective.
Authorization Notice No. is that CN202970803U Chinese patent discloses a kind of feed pump turbine high-pressure air source inscribe
Change nozzle sets system, including the first jet chimney, the second jet chimney, nozzle ring, leaf grating nozzle, first piece, last block, its mesohigh
Vaporium is located inside nozzle ring, and the second jet chimney and nozzle ring integration processing are formed, and the first jet chimney and second steams
Steam pipe road by being welded to connect, leaf grating nozzle, first piece, last block is fixed on nozzle ring.Steam enters vaporium by pipeline, so
Done work by impact rotor after leaf grating nozzle, leaf grating nozzle has a clear superiority compared with orifice plate nozzle in efficiency.The system is cut
Change with vapour amount regulation can be realized by the flow control valve in high-pressure air source, can be achieved high pressure nozzle group independent operating and with it is low
Pressure nozzle sets are run simultaneously.
Above-mentioned patent provided with high pressure and two kinds of vaporiums of low pressure by that can solve under low middle high three kinds of pressure states switching
Restriction loss and warm cylinder problem, while this provides a kind of new technical scheme to solve the above problems using new.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of nozzle of steam turbine group.Pass through
The change automatic regulating valve column piston of steam pressure and the matching relationship of valve opening, so that all jet chamber are equal in a low voltage state
Vapour can be led, only has part jet chamber to lead vapour under mesohigh state, so as to be realized in same nozzle sets under low-pressure state
Warm cylinder effect and reduce from low-pressure state be transitioned into mesohigh state when restriction loss.
To achieve the above object, the utility model provides following technical scheme：
A kind of nozzle of steam turbine group, including outer shell, it is characterized in that：Outer shell is divided into outer cylinder seat and is set up in outer cylinder seat top
And the upper cylinder seat on turbine rotor is located at outer cylinder seat engagement sleeves；Upper cylinder seat upper interior is provided with a vaporium, in vaporium
Portion is divided into multiple independent jet chamber, and each jet chamber upper end is provided with the valve for jet chamber and exterior space to be completely cut off
Plate, the valve opening for penetrating valve plate is provided with every piece of valve plate；Be fixed with upper cylinder seat upper end opening be intended for valve opening and with upper cylinder seat
The steam cover of closed cavity can be formed, several is offered on the upper inwall of steam cover from the bottom to top and is corresponded with each valve opening
Cylinder groove；Some valve rod pistons are provided with steam cover, every valve rod piston is embedded in valve towards jet chamber one end is removable
Kong Zhong, the other end are installed with the piston head that can be embedded in cylinder groove and coordinate with cylinder groove；Valve rod piston positioned at centre is spy
Different valve rod piston, remaining piston is common valve column piston, and common valve column piston is provided with water conservancy diversion cavity inside valve opening one end, and
Water conservancy diversion cavity does not penetrate peripheral valve column piston bottom, and water conservancy diversion cavity upper end is provided with the upper guiding gutter for entering water conservancy diversion cavity for steam,
Water conservancy diversion cavity lower end is provided with the lower guiding gutter that water conservancy diversion cavity is run out of for steam；Particular usage valve column piston is provided with inside valve opening one end
Diversion cavity, and diversion cavity penetrates peripheral valve column piston bottom and forms pod apertures, diversion cavity upper end is provided with enters diversion cavity for steam
Independent diversion groove.
By using above-mentioned technical proposal, closed by the cooperation of the change automatic regulating valve column piston and valve opening of steam pressure
System, so that all jet chamber can lead vapour in a low voltage state, only have part jet chamber to lead vapour under mesohigh state, from
And realized in same nozzle sets the warm cylinder effect under low-pressure state and reduce from low-pressure state be transitioned into mesohigh state when
Restriction loss.
It is of the present utility model to be further arranged to：The connected gas of connection is provided with inwall of the cylinder groove close to topmost
The through hole of cylinder groove.
By using above-mentioned technical proposal, make the air pressure in each cylinder groove identical, reduce certain during long-term use
Atmospheric pressure lost causes corresponding mismatch error between valve rod piston and valve opening in individual cylinder groove.
It is of the present utility model to be further arranged to：Fixed restricted valve rod piston excessively moves up on the cylinder groove inwall
Limited block.
By using above-mentioned technical proposal, prevent valve rod piston from excessively moving up disengaging cylinder groove.
It is of the present utility model to be further arranged to：The common valve column piston is provided with two " O " shape high-temperature resistant seal rings,
Respectively upper sealing ring and lower seal, upper sealing ring are located at the upside on water conservancy diversion cavity top, and lower seal is located at water conservancy diversion cavity
The downside of bottom；An independent sealed circle for being placed in diversion cavity top top is provided with particular usage valve column piston.
By using above-mentioned technical proposal, the seal between valve rod piston and valve opening is improved, reduces restriction loss.
It is of the present utility model to be further arranged to：Fillet is led in the valve opening edge.
By using above-mentioned technical proposal, make sealing ring more smooth during moving up and down.
It is of the present utility model to be further arranged to：The nearly valve rod piston one side of all piston heads is provided with stress groove.
By using above-mentioned technical proposal, the contact area of increase steam and piston head, beneficial to the movement of valve rod piston.
The utility model has advantages below：Pass through the change automatic regulating valve column piston of steam pressure and the cooperation of valve opening
Relation, so that all jet chamber can lead vapour in a low voltage state, only have part jet chamber to lead vapour under mesohigh state,
Mesohigh state is transitioned into so as to realize the warm cylinder effect under low-pressure state in same nozzle sets and reduce from low-pressure state
When restriction loss.
Brief description of the drawings
Fig. 1 is the present embodiment structural representation；
Fig. 2 is the present embodiment diagrammatic cross-section；
Fig. 3 is the present embodiment common valve column piston diagrammatic cross-section；
Fig. 4 is the present embodiment particular usage valve column piston diagrammatic cross-section.
Reference：1st, outer shell；11st, outer cylinder seat；12nd, upper cylinder seat；121st, jet chamber；122nd, steam jet；123rd, lower outer
Side；124th, valve plate；125th, valve opening；13rd, steam cover；131st, air intake；132nd, upper outer side；2nd, cylinder groove；21st, demarcation strip；22、
Limited block；23rd, through hole；3rd, particular usage valve column piston；31st, diversion cavity；32nd, independent diversion groove；33rd, pod apertures；34th, it is independent sealed
Circle；4th, common valve column piston；41st, water conservancy diversion cavity；42nd, upper guiding gutter；43rd, lower guiding gutter；44th, upper sealing ring；45th, lower sealing
Circle；5th, piston head；6th, stress groove.
Embodiment
The utility model is described further referring to the drawings.
With reference to figure 1, a kind of nozzle of steam turbine group includes outer shell 1, and outer shell 1 divides for outer cylinder seat 11 and is set up in outer cylinder seat 11
Top simultaneously coordinates the upper cylinder seat 12 being set on turbine rotor with outer cylinder seat 11, and steam cover is fixed with the upper upper end of cylinder seat 12
13。
With reference to figure 2, the upper upper interior of cylinder seat 12 is provided with a vaporium, and steam chamber is divided into multiple independent jet chamber
121, each lower end of jet chamber 121 offers and steam jet 122 of the ft connection for steam to be led to rotor, each jet chamber
121 upper ends are provided with the valve plate 124 for jet chamber 121 and exterior space to be completely cut off, and are provided with and penetrate on every piece of valve plate 124
Fillet has been led at the valve opening 125 of valve plate 124, the edge of valve opening 125.
With reference to figure 2, opening is fixed with the upper upper end of cylinder seat 12 and is intended for valve opening 125 and can form confined air with upper cylinder seat 12
The steam cover 13 of chamber, several and each 125 one-to-one gas of valve opening are offered from the bottom to top on the upper inwall of steam cover 13
Cylinder groove 2 and each cylinder groove 2 is separated by by demarcation strip 21, connection is provided with inwall of the cylinder groove 2 close to topmost and is connected cylinder
The through hole 23 of groove 2.Some valve rod pistons are provided with steam cover 13, every valve rod piston is removable towards the one end of jet chamber 121
Dynamic to be embedded in valve opening 125, the other end is installed with the piston head 5 that can be embedded in cylinder groove 2 and coordinate with cylinder groove 2, all pistons
First 5 nearly valve rod piston one side is provided with stress groove 6, the limited block that fixed restricted piston head 5 excessively moves up on the inwall of cylinder groove 2
22.Valve rod piston positioned at centre is particular usage valve column piston 3, and remaining piston is common valve column piston 4.
With reference to figure 3, common valve column piston 4 is provided with water conservancy diversion cavity 41 inside the one end of valve opening 125, and water conservancy diversion cavity 41 is not
Peripheral valve column piston bottom is penetrated, the upper end of water conservancy diversion cavity 41 is provided with the upper guiding gutter 42 for entering water conservancy diversion cavity 41 for steam, water conservancy diversion
The lower end of cavity 41 is provided with the lower guiding gutter 43 that water conservancy diversion cavity 41 is run out of for steam.It is resistance to that common valve column piston 4 is provided with two " O " shapes
High-temperature seal ring, respectively upper sealing ring 44 and lower seal 45, upper sealing ring 44 located at the upside on the top of water conservancy diversion cavity 41 and
The top of water conservancy diversion cavity 41 is closed on, lower seal 45 is located at the downside of the bottom of water conservancy diversion cavity 41 and closes on the bottom of water conservancy diversion cavity 41.
With reference to figure 4, particular usage valve column piston 3 is provided with diversion cavity 31 inside the one end of valve opening 125, and diversion cavity 31 penetrates week
Enclose valve rod piston bottom end and form pod apertures 33, the upper end of diversion cavity 31 is provided with the independent diversion groove 32 for entering diversion cavity 31 for steam.
An independent sealed circle for being placed in the top top of diversion cavity 31 and closing on the top of diversion cavity 31 is provided with particular usage valve column piston 3
34。
Specific implementation process：Work as initial operating stage, low-pressure steam is passed through in steam cover 13, because pressure is relatively steamed in cylinder groove 2
Pressure is smaller in vapour lid 13, and particular usage valve column piston 3 and common valve column piston 4 are pushed upwardly, and are made on particular usage valve column piston 3
Upper guiding gutter 42 on independent diversion groove 32 and common valve column piston 4 is turned on inside steam cover 13, and low-pressure steam can be from independence
Guiding gutter 32 or upper guiding gutter 42 enter diversion cavity 31 or water conservancy diversion cavity 41 and imported often by pod apertures 33 or lower guiding gutter 43
In individual jet chamber 121, the steam in jet chamber 121 is directed on rotor by steam jet 122 again.When pressure increases to certain journey
When spending, common valve column piston 4 continues to move up, and lower guiding gutter 43 is blocked by valve opening 125, it is impossible to vapour is led, and intermediate valve column piston is still
Vapour can be led by pod apertures 33.
Described above is only preferred embodiment of the present utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (6)
1. a kind of nozzle of steam turbine group, including outer shell（1）, it is characterized in that：Outer shell（1）It is divided into outer cylinder seat（11）And it is set up in outer
Cylinder seat（11）Top and with outer cylinder seat（11）Coordinate the upper cylinder seat being set on turbine rotor（12）；Upper cylinder seat（12）In top
Portion is provided with a vaporium, and steam chamber is divided into multiple independent jet chamber（121）, each jet chamber（121）Upper end is respectively provided with
Have and be used for jet chamber（121）With the valve plate of exterior space isolation（124）, every piece of valve plate（124）On be provided with and penetrate valve plate
（124）Valve opening（125）；In upper cylinder seat（12）Upper end is fixed with opening and is intended for valve opening（125）And with upper cylinder seat（12）Can shape
Into the steam cover of closed cavity（13）, steam cover（13）Upper inwall on offer several and each valve opening from the bottom to top
（125）One-to-one cylinder groove（2）；In steam cover（13）It is interior to be provided with some valve rod pistons, every valve rod piston direction spray
Steam chest（121）One end is removable to be embedded in valve opening（125）In, the other end, which is installed with, can be embedded in cylinder groove（2）Interior and and cylinder groove（2）
The piston head of cooperation（5）；Valve rod piston positioned at centre is particular usage valve column piston（3）, remaining piston is common valve column piston
（4）, common valve column piston（4）Close to valve opening（125）Water conservancy diversion cavity is provided with inside one end（41）, and water conservancy diversion cavity（41）Do not penetrate
Peripheral valve column piston bottom, water conservancy diversion cavity（41）Upper end is provided with enters water conservancy diversion cavity for steam（41）Upper guiding gutter（42）, lead
Flow cavity（41）Lower end is provided with runs out of water conservancy diversion cavity for steam（41）Lower guiding gutter（43）；Particular usage valve column piston（3）Close to valve
Hole（125）Diversion cavity is provided with inside one end（31）, and diversion cavity（31）Penetrate peripheral valve column piston bottom and form pod apertures（33）,
Diversion cavity（31）Upper end is provided with enters diversion cavity for steam（31）Independent diversion groove（32）.
2. a kind of nozzle of steam turbine group according to claim 1, it is characterized in that：In the cylinder groove（2）Close to topmost
Inwall on be provided with connection be connected cylinder groove（2）Through hole（23）.
3. a kind of nozzle of steam turbine group according to claim 1 or 2, it is characterized in that：The cylinder groove（2）It is fixed on inwall
The limited block that restricted valve rod piston excessively moves up（22）.
4. a kind of nozzle of steam turbine group according to claim 1, it is characterized in that：The common valve column piston（4）It is provided with
Two " O " shape high-temperature resistant seal rings, respectively upper sealing ring（44）And lower seal（45）, upper sealing ring（44）It is empty located at water conservancy diversion
Chamber（41）The upside on top, lower seal（45）Located at water conservancy diversion cavity（41）The downside of bottom；In particular usage valve column piston（3）On set
There is one to be placed in diversion cavity（31）The independent sealed circle on top top（34）.
5. a kind of nozzle of steam turbine group according to claim 1, it is characterized in that：The valve opening（125）Fillet is led in edge.
6. a kind of nozzle of steam turbine group according to claim 1, it is characterized in that：All piston heads（5）Nearly valve rod is lived
Plug one side is provided with stress groove（6）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720745063.9U CN206972311U (en) | 2017-06-26 | 2017-06-26 | A kind of nozzle of steam turbine group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720745063.9U CN206972311U (en) | 2017-06-26 | 2017-06-26 | A kind of nozzle of steam turbine group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206972311U true CN206972311U (en) | 2018-02-06 |
Family
ID=61409591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720745063.9U Active CN206972311U (en) | 2017-06-26 | 2017-06-26 | A kind of nozzle of steam turbine group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206972311U (en) |
-
2017
- 2017-06-26 CN CN201720745063.9U patent/CN206972311U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203906107U (en) | Combined type air cylinder cover and internal combustion engine body | |
| CN206972311U (en) | A kind of nozzle of steam turbine group | |
| CN103925102A (en) | Composite cylinder cover | |
| CN206310069U (en) | Regulating valve | |
| CN206458881U (en) | A kind of Pneumatic control plastic valve | |
| CN215566155U (en) | Internal mixing structure valve device | |
| CN202325705U (en) | Steam extraction pressure adjusting mechanism for steam extraction turbine | |
| CN210265931U (en) | Double-sealing-surface valve sealing pair, double-sealing-surface valve and steam turbine bypass system | |
| CN201486607U (en) | External-open air distribution engine for valve body | |
| CN205243664U (en) | Take easily restoration type of sealing washer engine cylinder lid | |
| CN201661326U (en) | Engine with external-opening air distribution valve bodies | |
| CN211778998U (en) | Hydraulic control needle valve | |
| CN101571068B (en) | Valve body external-open air distribution engine | |
| CN205225480U (en) | Wear -resisting type engine cylinder lid | |
| CN208565596U (en) | A kind of antiscour compound seal formula drain valve | |
| CN102434228A (en) | Adjusting mechanism for steam extraction pressure for steam extraction turbine | |
| CN205225479U (en) | Can increase easy restoration type engine cylinder lid of swirl ratio | |
| CN205225478U (en) | Engine cylinder cover | |
| CN114856748B (en) | self-adjusting exhaust valve | |
| CN202914879U (en) | High differential pressure feed-regulating valve | |
| CN205243665U (en) | Can strengthen refrigerated engine cylinder of valve portion lid | |
| CN205225477U (en) | Take engine cylinder lid of sealing washer | |
| CN203685332U (en) | Improved internal combustion engine air valve structure | |
| CN209212415U (en) | EGR valve | |
| CN101571058B (en) | Distribution engine with externally opened valve body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |