CN109707465A - One kind being used for the adjustable device of extracted steam from turbine and method - Google Patents
One kind being used for the adjustable device of extracted steam from turbine and method Download PDFInfo
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- CN109707465A CN109707465A CN201811609143.7A CN201811609143A CN109707465A CN 109707465 A CN109707465 A CN 109707465A CN 201811609143 A CN201811609143 A CN 201811609143A CN 109707465 A CN109707465 A CN 109707465A
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- steam
- adjustable
- turbine
- outer shell
- cylinder
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Abstract
The invention discloses a kind of steam-turbine plants, especially a kind of to be used for the adjustable device of extracted steam from turbine and method, belong to steam-turbine plant technical field；The device includes the cylinder being installed on the outside of steam turbine, which includes outer shell, inner casing and exhaust casing, is additionally provided with extraction steam pipe on the outer shell, and the adjustable vapor extraction device for adjusting vapour pressure is provided between the outer shell and inner casing；The present invention solves the problems, such as the built-in extraction regulation device arrangement axial occupation space of current steam turbine, by the way that adjustable vapor extraction device is set between double shell structure, it is designed in conjunction with the structure of adjustable vapor extraction device, unit bearing span effectively can be reduced without occupying unit axial space using outer shell interlayer space in steam turbine, or reduce rotor quantity, reduce shaft system of unit length, axial arrangement is compact, reduces unit cost.
Description
Technical field
The present invention relates to steam-turbine plants, especially a kind of to be used for the adjustable device of extracted steam from turbine and method, belong to
Steam-turbine plant technical field.
Background technique
The existing built-in extraction regulation device of steam turbine has the structures such as cylinder valve and rotating barrier, these structures are arranged in
On cylinder internal steam flow axial passage, need to occupy the axial space of unit.In bearing span anxiety, Chang Yinwei bearing span
Increase, reduce the stability of shaft system of unit, or increase unit rotor and supported amount meets shafting stability requirement.
Summary of the invention
Goal of the invention of the invention is: in view of the above problems, providing a kind of adjustable for extracted steam from turbine
Device and method reduce unit bearing span, or reduce rotor quantity, make unit axis without occupying unit axial space
It is that length reduces, axial arrangement is compact, reduces unit cost.
The technical solution adopted by the invention is as follows:
One kind be applied to the adjustable device of extracted steam from turbine, including the cylinder being installed on the outside of steam turbine, the cylinder include outer shell,
Inner casing and exhaust casing are additionally provided with extraction steam pipe on the outer shell, and being provided between the outer shell and inner casing can for adjust vapour pressure
Vapor extraction device is adjusted, inner casing is provided with cylinder air intake.
Further, adjustable vapor extraction device to exhaust casing be additionally provided with matched with outer shell assembly diaphragm housing ring/support ring and
Multiple partitions.
Further, portion arranges that cylinder is divided into high pressure section by gap bridge packing by gap bridge packing, the cylinder in the cylinder
And low pressure stage.
Further, which includes the support ring that assembly is matched with outer shell, and matched with support ring
The cover, the first window that support ring same position corresponding with the cover is provided with, the cover side corresponding with support ring are set
It is equipped with groove, is provided with swivel becket in the groove, the cover, swivel becket and support ring assembly are integrated, and are set on the swivel becket
It is equipped with the second window corresponding with first window, the control of flow is realized by the rotation of swivel becket.
Further, which is also connected with the link mechanism for driving swivel becket to rotate, which passes through
Executing agency's driving.
Further, which is to adjust valve type vapor extraction device, and the valve body including matching assembly with outer shell should
Multiple valve seats are provided on valve body, which offers valve opening, which runs through valve body, is additionally provided with valve disc on the valve seat to control
Valve opening flow valve disc processed is moved up and down by valve rod realization, which is realized by executing agency and moved up and down.
One kind being applied to the adjustable method of steam turbine, and there is the interlayer position of the double-deck cylinder body the adjustable pumping of steam extraction is arranged
Vapour device, this is adjustable, and vapor extraction device is assemblied on outer shell, by the initial steam pressure of air intake to adjustable vapor extraction device and outer shell, inner casing
The extraction pressure for forming cylinder high pressure chest is high pressure section, and steam pressure end to the exhaust casing exhaust steam pressure after adjustable vapor extraction device is
Low pressure stage；
Wherein, adjustable vapor extraction device is using dislocation valve arrangement, using opening up multipair the in the support ring and the cover of fixing assembling
One window, and using the second window that corresponding number is arranged on swivel becket, by control swivel becket rotation adjust first window and
The case where second window misalignment, is to realize the control to steam extraction amount.
Further, which is single cylinder structure, and the single cylinder structure is outer shell, outer shell assembly where the low pressure stage
There are diaphragm housing ring/support ring and multiple partitions.
Further, if steam turbine is impulse turbine, which is equipped with diaphragm housing ring；If steam turbine is reactionary style vapour
Turbine, the outer shell are equipped with support ring.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
One kind of the invention solves the built-in extraction regulation of current steam turbine for the adjustable device and method of extracted steam from turbine
Device arranges the problem of axial occupation space, by the way that adjustable vapor extraction device to be set between double shell structure, in conjunction with adjustable pumping
The structure of vapour device designs, and can effectively be reduced using outer shell interlayer space in steam turbine without occupying unit axial space
Unit bearing span, or rotor quantity is reduced, reduce shaft system of unit length, axial arrangement is compact, reduces unit cost.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 is one of schematic structural view of the invention；
Fig. 2 is the schematic cross-section of present invention dislocation valve arrangement；
Fig. 3 is the two of schematic structural view of the invention；
Fig. 4 is the schematic cross-section that the present invention adjusts valve type vapor extraction device.
Marked in the figure: the adjustable vapor extraction device of 1-, 2- extraction steam pipe, 3- outer shell, 4- inner casing, 5- gap bridge packing, 6- diaphragm housing ring (are held
Ring), 7- rotor and movable vane piece, 8- partition, 9- exhaust casing, 10, rear packing, 11- front steam seal, 12- the cover, 13a- first window,
The second window of 13b-, 14- swivel becket, 15- link mechanism, 16- support ring, 17- steam seal ring, 18- air intake, 19- groove, 20-
Adjust valve type vapor extraction device, 21- valve body, 22- valve seat, 23- valve disc, 24- valve rod, 25- sealing element.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
?.
Embodiment 1
One kind being used for the adjustable device of extracted steam from turbine, as shown in Fig. 1 and Fig. 3, including the cylinder being installed on the outside of steam turbine,
The cylinder includes outer shell 3, inner casing 4 and exhaust casing 9, is additionally provided with extraction steam pipe 2 on the outer shell 3, between the outer shell 3 and inner casing 4
It is provided with the adjustable vapor extraction device 1 for adjusting vapour pressure, inner casing 4 is provided with cylinder air intake 18.
In the present embodiment, adjustable vapor extraction device is assemblied between the interlayer of interior outer shell, to adequately realize to inside and outside
The utilization of cylinder interlayer space, also, avoid the problem that adjustable vapor extraction device occupies unit space, meanwhile, as needed, adjustable pumping
The vapour pressure problem of the adjustable high pressure section of vapour device.By the design, after steam enters steam turbine, steam passes through in high pressure cylinder
After partition and movable vane piece, and it is through-flow to cylinder low pressure stage to be turned back by adjustable vapor extraction device, and steam flow, which continues expansion in low pressure stage, to be done
Function.
As more specifical design, more optimal design, adjustable vapor extraction device to steam discharge are carried out for spacer mechanism
Cylinder is additionally provided with the diaphragm housing ring/support ring 6 and multiple partitions 8 that assembly is matched with outer shell.The partial-cylinder is single outer cylinder structure, together
When part be provided with spacer mechanism, outer cylinder interior is then rotor and movable vane piece 7
In order to guarantee packing effect, as more specifical design, portion arranges that gap bridge packing, the cylinder pass through gap bridge in the cylinder
Cylinder is divided into high pressure section and low pressure stage by packing 5.Specifically, the inner casing matches assembly with outer shell.
Specifically it is designed for adjustable vapor extraction device, in a wherein specific embodiment, this is adjustable vapor extraction device
Including matched with outer shell assembly support ring 16, and with the matched the cover 12 of support ring, support ring phase corresponding with the cover
With the first window 13a that position is provided with, the cover 12 side setting fluted 19 corresponding with support ring, the interior setting of the groove
There is swivel becket 14, the cover, swivel becket and support ring assembly are integrated, and are provided on the swivel becket 14 corresponding with first window
The second window 13b, pass through swivel becket rotation realize flow control.As the more specifical the cover 12 and support ring it
Between bolt can be used be fixedly connected.
More specifically, which is also connected with the link mechanism 15 for driving swivel becket to rotate, the connecting rod machine
Structure is driven by executing agency, and certainly, in order to guarantee the rotating effect of swivel becket, which is provided with for link rotatable
Sliding slot.And in specific design, which includes 1 connecting rod, and both ends are cut with scissors with swivel becket and executing agency respectively
Connect (similar slider-crank mechanism).The executing agency can be such as electronics/hydraulic telescoping cylinder at this time.More specifically, the connecting rod
Mechanism 15 includes 2 articulated linkages, wherein one one end is articulated with swivel becket, another through outer shell and solid with executing agency
Fixed connection.Sealing element is provided between connecting rod and outer shell.Specifically, being provided with steam seal ring between support ring and rotor and movable vane piece
17。
It, can also be using other designs, in another specific embodiment, pumping that this is adjustable based on the mode of above-mentioned design
Vapour device is to adjust valve type vapor extraction device 20, the valve body 21 including matching assembly with outer shell, is provided with multiple valve seats on the valve body
22, which offers valve opening, which runs through valve body, is additionally provided with valve disc 23 on the valve seat to control valve opening flow, the valve
Dish 23 is moved up and down by the realization of valve rod 25, which is realized by executing agency and moved up and down.Specifically, valve rod is through outer
Cylinder.Sealing element 25 is provided between valve rod and outer shell.Steam seal ring 17 is provided between valve body and inner casing 4.
More specifically, the front end of cylinder is provided with front steam seal 10, and rear end is provided with rear packing 11.
Embodiment 2
One kind being applied to the adjustable method of steam turbine, in the adjustable steam extraction dress of interlayer position setting steam extraction with the double-deck cylinder body
It sets, this is adjustable, and vapor extraction device is assemblied on outer shell, is formed by initial steam pressure to the adjustable vapor extraction device and outer shell, inner casing of air intake
The extraction pressure of cylinder high pressure chest is high pressure section, and the steam pressure end after adjustable vapor extraction device to exhaust casing exhaust steam pressure is low pressure
Section；
Wherein, adjustable vapor extraction device is using dislocation valve arrangement, using opening up multipair the in the support ring and the cover of fixing assembling
One window, and using the second window that corresponding number is arranged on swivel becket, by control swivel becket rotation adjust first window and
The case where second window misalignment, is to realize the control to steam extraction amount.
As more specifical design, which is single cylinder structure, and the single cylinder structure is outer shell, and outer shell is equipped with
Diaphragm housing ring/support ring and multiple partitions.
In more specifical structure, if steam turbine is impulse turbine, which is equipped with diaphragm housing ring；If steam turbine is
Reaction turbine, the outer shell are equipped with support ring.
More specifically, which is opened with low pressure stage by gap bridge sealed separation.
In conclusion one kind of the invention solves in current steam turbine for the adjustable device and method of extracted steam from turbine
Set formula extraction regulation device arrangement axial occupation space the problem of, by by adjustable vapor extraction device be set to double shell structure it
Between, it is designed in conjunction with the structure of adjustable vapor extraction device, it can be effectively using outer shell interlayer space in steam turbine, without occupying unit
Axial space reduces unit bearing span, or reduces rotor quantity, reduces shaft system of unit length, and axial arrangement is compact, drop
Low unit cost.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (9)
1. one kind is applied to the adjustable device of extracted steam from turbine, it is characterised in that:, should including the cylinder being installed on the outside of steam turbine
Cylinder includes outer shell (3), inner casing (4) and exhaust casing (9), is additionally provided with extraction steam pipe (2) on the outer shell (3), the outer shell (3) with
The adjustable vapor extraction device (1) for adjusting vapour pressure is provided between inner casing (4), inner casing (4) is provided with cylinder air intake (18).
2. as described in claim 1 a kind of applied to the adjustable device of extracted steam from turbine, it is characterised in that: adjustable vapor extraction device
Diaphragm housing ring/the support ring (6) and multiple partitions (8) that assembly is matched with outer shell are additionally provided with to exhaust casing.
3. as described in claim 1 a kind of applied to the adjustable device of extracted steam from turbine, it is characterised in that: portion's cloth in the cylinder
Gap bridge packing is set, steam flow channel partition in cylinder is high pressure section and low pressure stage by gap bridge packing.
4. as described in claim 1 a kind of applied to the adjustable device of extracted steam from turbine, it is characterised in that: steam extraction that this is adjustable dress
Set the support ring (16) including matching assembly with outer shell, and with the matched the cover of support ring (12), the support ring and the cover pair
Fluted (19) are arranged in the first window (13a) that the same position answered is provided with, the cover (12) side corresponding with support ring,
It is provided in the groove swivel becket (14), the cover, swivel becket and support ring assembly are integrated, and are arranged on the swivel becket (14)
There is the second window (13b) corresponding with first window, the control of flow is realized by the rotation of swivel becket.
5. as claimed in claim 4 a kind of applied to the adjustable device of extracted steam from turbine, it is characterised in that: the swivel becket (14)
It is also connected with the link mechanism (15) for driving swivel becket to rotate, which is driven by executing agency.
6. as described in claim 1 a kind of applied to the adjustable device of extracted steam from turbine, it is characterised in that: steam extraction that this is adjustable dress
It is set to and adjusts valve type vapor extraction device, be provided with multiple valve seats (22) including match the valve body (21) assembled with outer shell, on the valve body,
The valve seat offers valve opening, which runs through valve body, is additionally provided with valve disc (23) on the valve seat to control the valve opening flow valve disc
(23) it is realized and is moved up and down by valve rod (25), which is realized by executing agency and moved up and down.
7. one kind is applied to the adjustable method of steam turbine, it is characterised in that: in the interlayer position setting with the double-deck cylinder body
Steam extraction is adjustable vapor extraction device, this is adjustable, and vapor extraction device is assemblied on outer shell, by the initial steam pressure of air intake to adjustable vapor extraction device
The extraction pressure for forming cylinder high pressure chest with outer shell, inner casing is high pressure section, the steam pressure end after adjustable vapor extraction device to steam discharge
Cylinder exhaust steam pressure is low pressure stage；
Wherein, adjustable vapor extraction device is using dislocation valve arrangement, using opening up multipair the in the support ring and the cover of fixing assembling
One window, and using the second window that corresponding number is arranged on swivel becket, by control swivel becket rotation adjust first window and
The case where second window misalignment, is to realize the control to steam extraction amount.
8. as claimed in claim 7 a kind of applied to the adjustable method of extracted steam from turbine, it is characterised in that: the low pressure stage is single
Cylinder structure, and the single cylinder structure is outer shell, and outer shell where the low pressure stage is equipped with diaphragm housing ring/support ring and multiple partitions.
9. as claimed in claim 8 a kind of applied to the adjustable method of extracted steam from turbine, it is characterised in that: if steam turbine is punching
Dynamic formula steam turbine, the outer shell are equipped with diaphragm housing ring；If steam turbine is reaction turbine, which is equipped with support ring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018114535984 | 2018-11-30 | ||
| CN201811453598 | 2018-11-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109707465A true CN109707465A (en) | 2019-05-03 |
| CN109707465B CN109707465B (en) | 2021-09-21 |
Family
ID=66258550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811609143.7A Active CN109707465B (en) | 2018-11-30 | 2018-12-27 | Adjustable device and method for steam extraction of steam turbine |
Country Status (1)
| Country | Link |
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| CN (1) | CN109707465B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115853605A (en) * | 2022-12-01 | 2023-03-28 | 东方电气集团东方汽轮机有限公司 | Steam turbine industry steam extraction regulating valve |
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