CN206319913U - The nozzle blade assembled unit body of steam turbine - Google Patents
The nozzle blade assembled unit body of steam turbine Download PDFInfo
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- CN206319913U CN206319913U CN201621458265.7U CN201621458265U CN206319913U CN 206319913 U CN206319913 U CN 206319913U CN 201621458265 U CN201621458265 U CN 201621458265U CN 206319913 U CN206319913 U CN 206319913U
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- nozzle blade
- steam
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Abstract
A kind of nozzle blade assembled unit body of steam turbine, the nozzle blade assembled unit body by integral forming has some through holes, and each through hole constitutes the steam jet with the steam chambers of the steam turbine.The nozzle blade assembled unit body has admission end and steam output end, the admission end and the steam chambers, the admission end of the nozzle blade assembled unit body includes central part and outer rim, form annular recess between the central part and the outer rim, the nozzle is through the annular recess and along the circumferentially distributed of the annular recess.Nozzle blade assembled unit body of the present utility model has simple in construction, convenient processing, low cost, simple and convenient for maintenance, and these advantages have well adapted to low discharge, the demand of low-power waste heat steam-turbine unit.
Description
Technical field
The present invention relates to steam turbine field, more particularly to one kind can flexibly realize the grading vapour aperture of regulation and processing is simple
Steam turbine nozzle blade assembled unit body.
Background technology
At present, advanced technique group is typically all arranged on after vaporium, is supported by dividing plate outer ring and inner ring, technique is using weldering
Connect combination or riveting is formed.Wherein nozzle sets be by multiple Nozzle combinations together, constitute a fan-shaped nozzle segment,
And nozzle flow channel is made up of two stator blades, it is therefore desirable to there is many stator blades.It is such design cause processing cost and
The increase of installation cost, and assembly precision is difficult to ensure that.If using degree of partial admission, supporter also needs to be spaced further apart
Processing.
The content of the invention
In view of this, present invention proposition is a kind of is suitable for low discharge, the vapor wheel of low-power waste heat steam-turbine unit demand
The nozzle blade assembled unit body of machine.
A kind of nozzle blade assembled unit body of steam turbine, the nozzle blade assembled unit body possess integrally formed with
Some through holes, each through hole constitutes the steam jet with the steam chambers of the steam turbine.
In one embodiment, the nozzle blade assembled unit body has admission end and steam output end, the admission end and institute
State steam chambers, the admission end of the nozzle blade assembled unit body includes central part and outer rim, the central part with it is described
Annular recess is formed between outer rim, the nozzle divides through the annular recess and along the circumference of the annular recess
Cloth.
In one embodiment, some ribs of connect setting between the central part and the outer rim, some ribs will
Some nozzles are separated into multigroup, and each group of nozzle is corresponding with a steam flow channel of the vaporium.
In one embodiment, the quantity of the nozzle is set to 15, and the quantity of the rib is set to 3,3 ribs
By 15 nozzle equipartitions into 3 groups.
In one embodiment, the nozzle include nozzle entrance and jet expansion, the nozzle entrance and jet expansion it
Between form runner, the runner is shaped as Laval nozzle runner.
In one embodiment, a throat is formed in the runner, the runner is from the nozzle entrance to the throat
Tapered, it is flaring from the throat to the jet expansion, and from the throat to the runner section of the jet expansion
It is centroclinal towards the nozzle blade assembled unit body.
In one embodiment, steam output end one circular depression of formation of the nozzle blade assembled unit body, the nozzle
Outlet is connected with the circular depression, and the circumference of the circular depression is defined by the outer rim.
In one embodiment, the central part has the central through hole through the nozzle blade assembled unit body, described
Central through hole is connected with the circular depression.
In one embodiment, the central part is concordant in the admission end with the outer rim.
In one embodiment, some ribs of connect setting between the central part and the outer rim, some ribs will
Some nozzles are separated into multigroup, and each group of nozzle is corresponding with a steam flow channel of the vaporium, the central part, outer rim
It is concordant in the admission end with rib.
In summary, the present invention proposes a kind of nozzle blade assembled unit body of steam turbine, and nozzle blade combination is single
First body eliminates stator blade and elimination supporting clapboard separate machined and by the traditional mode of welded and installed, using integrated thought
Directly drilled on dividing plate.The flow channel shape in hole is Laval nozzle runner, and the runner section from nozzle entrance to throat is tapered,
Runner section from throat to jet expansion is to nozzle blade assembled unit body is centroclinal and flaring.Provided with segmentation rib
In embodiment, pass through drilled number and control per share working medium, number and nozzle stream that such as steam passes through nozzle flow channel
Road distribution situation can flexibly realize the grading vapour aperture of regulation, such as multigroup by setting rib to be separated into nozzle, every group of correspondence
One vaporium runner so that nozzle blade assembled unit body can realize that the full admission of working medium can realize that the part of working medium is entered again
Vapour.The nozzle blade assembled unit body of the present invention has simple in construction, convenient processing, low cost, simple and convenient for maintenance, these
Advantage has well adapted to low discharge, the demand of low-power waste heat steam-turbine unit.
Brief description of the drawings
Fig. 1 is the schematic diagram of the admission end of the nozzle blade assembled unit body of the present invention.
Fig. 2 is the schematic diagram of the steam output end of the nozzle blade assembled unit body of the present invention.
Fig. 3 is the sectional view of section B-B in Fig. 1.
Fig. 4 is the sectional view of Section A-A in Fig. 1.
Embodiment
Before describing the embodiments in more detail, it should be understood that the invention is not restricted to institute hereafter or in accompanying drawing in the application
The detailed construction or arrangement of elements of description.The embodiment that the present invention can realize for other manner.Furthermore, it is to be understood that this paper institutes
The wording and term used is solely for describing purposes, should not the explanation of being construed as limiting property." comprising " used herein, "comprising",
The similar wording such as " having " is meant comprising items listed thereafter, its equivalent and other additional things.Particularly, description is worked as
When " certain element ", the quantity that the present invention does not limit the element can also include multiple as one.
As shown in Fig. 1 to 2, the present invention proposes a kind of nozzle blade assembled unit body 10 of steam turbine, the nozzle blade
Assembled unit body 10 is connected with the vaporium of the steam turbine.Integrally formed with some logical on nozzle blade assembled unit body 10
Hole, such as directly drill on nozzle blade assembled unit body 10 or with other forming methods formation through hole.Each through hole structure
Into the steam jet 12 with steam chambers.
More specifically, nozzle blade assembled unit body 10 is disc.Nozzle blade assembled unit body 10 has admission end
14 and outlet side 16, admission end 14 is connected with vaporium close-fitting, and steam output end 16 can match with movable vane gap so that be sprayed by steam
The steam that mouth 12 sprays can do work on movable vane.
The admission end 14 of nozzle blade assembled unit body 10 includes central part 18 and outer rim 20, and central part 18 exists with outer rim 20
Admission end 14 is concordant.Central part 18 has the central through hole 19 through nozzle blade assembled unit body 10, and central through hole 19 is used for
It is connected or is passed through for axle with an axle, has sealing device between axle and nozzle blade assembled unit body.Central part 18 and outer rim 20 it
Between formed annular recess 22, nozzle 12 run through annular recess 22.Some nozzles 12 along the circumferentially distributed of annular recess 22,
For example, being evenly distributed along the circumference of annular recess 22.
In certain embodiments, some ribs 24 are connected between central part 18 and outer rim 20, some ribs 24 are arranged on
It is multigroup some nozzles 12 to be separated into respectively between two adjacent two nozzles 12 in annular recess 22.Each group of spray
Mouth is connected with a steam flow channel of vaporium, to reach the accurate purpose for matching somebody with somebody vapour so that nozzle blade assembled unit body 10 both may be used
Realize that partial admission again can full admission.In the present embodiment, central part 18, outer rim 20 and some ribs 24 are flat in admission end 14
Together.
In an illustrated embodiment, the quantity of nozzle 12 is set to 15, and the quantity of rib 24 is set to 3.3 ribs
Setting is evenly spaced in annular recess 22, by 15 equipartitions of nozzle 12 into 3 groups, every group 5.
It should be appreciated that in other embodiments, being required according to actual design, nozzle 12 and rib 24 can also be set
For other quantity, the present invention is not limited this.
As shown in figure 3, the steam output end 16 of nozzle blade assembled unit body 10 includes circular depression 26, circular depression 26
Circumference defined by outer rim 20.The central through hole 19 and nozzle 12 of central part 18 are connected with circular depression 26.In steam output end
The outer rim 20 of 16 sides can play a part of radial direction sealing gland.
Nozzle 12 includes nozzle entrance 30 and jet expansion 32, and nozzle entrance 30 is arranged on nozzle blade assembled unit body 10
Admission end 14, jet expansion 32 is arranged on the steam output end 16 of nozzle blade assembled unit body 10.Nozzle entrance 30 goes out with nozzle
Form runner 34 between mouthfuls 32, in an illustrated embodiment, runner 34 is shaped as Laval nozzle runner.
Specifically, as shown in figure 4, the inwall of runner 34 is smooth surface, a throat 36 is formed in runner 34.Runner 34
It is tapered from nozzle entrance 30 to throat 36, is flaring from throat 36 to jet expansion 32, and from throat 36 to nozzle
The runner section of outlet 32 is tilted towards the center of nozzle blade assembled unit body 10.Jet expansion 32 and circular depression
26 connections, circular depression 26 is correspondingly provided with turbine rotor blade below, and the vapor action from the ejection of jet expansion 32 is in the turbine
It is driven to rotate on movable vane.
Steam enters air stream enter runner from nozzle entrance 30, be in the runner to throat 36 it is tapered, therefore, the steam at throat 36
Flow velocity reaches critical speed value.Runner from throat 36 to jet expansion 32 is flaring, and combines single towards nozzle blade
First body 10 is centroclinal, and steam flow rate at this time crosses supersonic speed by critical speed so that steam face after arrival it is dynamic
Energy can reach maximum and utilize value when on leaf.
In summary, the present invention proposes a kind of nozzle blade assembled unit body of steam turbine, and nozzle blade combination is single
First body eliminates stator blade and elimination supporting clapboard separate machined and by the traditional mode of welded and installed, using integrated thought
Directly drilled on dividing plate.The flow channel shape in hole is Laval nozzle runner, and the runner section from nozzle entrance to throat is tapered,
Runner section from throat to jet expansion is to nozzle blade assembled unit body is centroclinal and flaring.Provided with segmentation rib
In embodiment, pass through drilled number and control per share working medium, number and nozzle stream that such as steam passes through nozzle flow channel
Road distribution situation can flexibly realize the grading vapour aperture of regulation, such as multigroup by setting rib to be separated into nozzle, every group of correspondence
One vaporium runner so that nozzle blade assembled unit body can realize that the full admission of working medium can realize that the part of working medium is entered again
Vapour.The dividing plate of the present invention has simple in construction, convenient processing, low cost, simple and convenient for maintenance, and these advantages are well adapted to
Low discharge, the demand of low-power waste heat steam-turbine unit.
Concepts described herein may be embodied to other forms in the case of without departing from its spirit and characteristic.It is disclosed
Specific embodiment should be considered as exemplary rather than restricted.Therefore, the scope of the present invention be by appended claim,
Rather than be determined according to these descriptions before.Any change in the letter and equivalency range of claim is all
The scope of these claims should be belonged to.
Claims (10)
1. a kind of nozzle blade assembled unit body of steam turbine, it is characterised in that the nozzle blade assembled unit body one
Some through holes are formed, each through hole constitutes the steam jet with the steam chambers of the steam turbine.
2. the nozzle blade assembled unit body of steam turbine as claimed in claim 1, it is characterised in that the nozzle blade group
Closing cell cube has admission end and steam output end, the admission end and the steam chambers, the nozzle blade assembled unit body
Admission end include central part and outer rim, annular recess is formed between the central part and the outer rim, the nozzle runs through
The annular recess and along the circumferentially distributed of the annular recess.
3. the nozzle blade assembled unit body of steam turbine as claimed in claim 2, it is characterised in that the central part and institute
State some ribs of connect setting between outer rim, some ribs some nozzles are separated into it is multigroup, each group of nozzle with
The steam flow channel correspondence of the vaporium.
4. the nozzle blade assembled unit body of steam turbine as claimed in claim 3, it is characterised in that the quantity of the nozzle
15 are set to, the quantity of the rib is set to 3, and 3 ribs are by 15 nozzle equipartitions into 3 groups.
5. the nozzle blade assembled unit body of steam turbine as claimed in claim 2, it is characterised in that the nozzle includes spray
Mouth entrance and jet expansion, form runner between the nozzle entrance and jet expansion, the Lavalle that is shaped as of the runner is sprayed
Mouth runner.
6. the nozzle blade assembled unit body of steam turbine as claimed in claim 5, it is characterised in that formed in the runner
One throat, the runner is tapered from the nozzle entrance to the throat, is gradually from the throat to the jet expansion
Expand, and it is centroclinal to the runner section of the jet expansion towards the nozzle blade assembled unit body from the throat.
7. the nozzle blade assembled unit body of steam turbine as claimed in claim 5, it is characterised in that the nozzle blade group
Steam output end one circular depression of formation of cell cube is closed, the jet expansion is connected with the circular depression, and the circle is recessed
The circumference in the portion of falling into is defined by the outer rim.
8. the nozzle blade assembled unit body of steam turbine as claimed in claim 7, it is characterised in that the central part has
Through the central through hole of the nozzle blade assembled unit body, the central through hole is connected with the circular depression.
9. the nozzle blade assembled unit body of steam turbine as claimed in claim 2, it is characterised in that the central part and institute
State outer rim concordant in the admission end.
10. the nozzle blade assembled unit body of steam turbine as claimed in claim 9, it is characterised in that the central part with
Some nozzles are separated into multigroup, each group of nozzle by some ribs of connect setting between the outer rim, some ribs
A steam flow channel with the vaporium is corresponding, and the central part, outer rim are concordant in the admission end with rib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621458265.7U CN206319913U (en) | 2016-12-28 | 2016-12-28 | The nozzle blade assembled unit body of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621458265.7U CN206319913U (en) | 2016-12-28 | 2016-12-28 | The nozzle blade assembled unit body of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206319913U true CN206319913U (en) | 2017-07-11 |
Family
ID=59260736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621458265.7U Active CN206319913U (en) | 2016-12-28 | 2016-12-28 | The nozzle blade assembled unit body of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206319913U (en) |
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2016
- 2016-12-28 CN CN201621458265.7U patent/CN206319913U/en active Active
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