CN204729135U - A kind of nozzle box's device of steam turbine and steam turbine - Google Patents
A kind of nozzle box's device of steam turbine and steam turbine Download PDFInfo
- Publication number
- CN204729135U CN204729135U CN201520382185.7U CN201520382185U CN204729135U CN 204729135 U CN204729135 U CN 204729135U CN 201520382185 U CN201520382185 U CN 201520382185U CN 204729135 U CN204729135 U CN 204729135U
- Authority
- CN
- China
- Prior art keywords
- nozzle box
- steam turbine
- nozzle
- room
- box
- 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
Abstract
The utility model provides a kind of nozzle box's device and steam turbine of steam turbine, and this nozzle box's device comprises: the top nozzle room be connected at horizontal flange place and lower nozzle box; Described top nozzle room and lower nozzle box are all being fixedly connected with inner casing wall near horizontal flange place; Described top nozzle room is all connected with inner casing wall by elastic sealing element with the mouth of pipe of lower nozzle box.This nozzle box's device reduces the gap of nozzle box and connection, nozzle box, reduces the radial clearance of the leaf top gas envelope of nozzle box simultaneously, thus reduces the leakage loss because clearance leakage causes, and greatly improves the efficiency of steam turbine acting.
Description
Technical field
The utility model belongs to steam turbine technology field, particularly relates to a kind of nozzle box's device and steam turbine of steam turbine.
Background technique
Impulse steam turbine acting principle (high temperature, high pressure) can be converted into kinetic energy (acceleration) by nozzle (static cascade) by steam, then converts the kinetic energy of steam to mechanical energy output (rotating speed, moment of torsion) by moving vane and rotor.Nozzle is static part, rotor movable vane is high-speed rotary part, therefore certain gap must be left between dynamic and static parts, fallen by clearance leakage under the effect of the small part steam pressure reduction before and after level in main flow, and do not participate in acting, and in order to prevent too much steam leakage, conventional employing mechanical seal (comb labyrinth gland), leave radial clearance between packing and rotor, prevent impact and rub.
Existing impulse steam turbine, advanced technique structure is upper, under, left, right four nozzle sets, be loaded in four nozzle boxs respectively, be called pintongs " bracket " structure, high-pressure inner cylinder is fixed on by the positioning ring at admission mouth of pipe place, during unit operation, nozzle box is heated to unit centre and expands, and moving vane is expanded to surrounding by center, therefore reserved larger radial clearance is needed between governing stage movable vane leaf top and packing, also larger gap is had between every two lobes in pintongs nozzle box, cause Steam loss large, increase the inside leakage losses of steam, loss is serious, direct impact to voltage cylinder efficiency.
So in prior art, because the air leakage of nozzle box is comparatively large, cause the loss of steam turbine high-pressure cylinder serious, efficiency is lower.
Model utility content
In view of this, an object of the present utility model is the nozzle box's device proposing a kind of steam turbine, to solve because the air leakage of nozzle box is large in prior art, thus causes the problem that the high-pressure cylinder mechanical efficiency of steam turbine is low.There is a basic understanding some aspects in order to the embodiment to disclosure, shown below is simple summary.This summarized section is not extensive overview, neither determine key/critical component or describe the protection domain of these embodiments.Its sole purpose presents some concepts by simple form, in this, as the preamble of following detailed description.
In some optional embodiments, this nozzle box's device comprises: the top nozzle room be connected at horizontal flange place and lower nozzle box; Described top nozzle room and lower nozzle box are all being fixedly connected with inner casing wall near horizontal flange place; Described top nozzle room is all connected with inner casing wall by elastic sealing element with the mouth of pipe of lower nozzle box.
In some optional embodiments, the elastic sealing element of this nozzle box's device comprises the seal ring of multiple stack setting.
In some optional embodiments, top nozzle room and the lower nozzle box of this nozzle box's device are provided with groove near the radial both sides of horizontal flange; Inner casing wall is provided with the boss of clamping corresponding to described groove.
In some optional embodiments, this nozzle box's device also comprises: at least two bolts; Top nozzle room is connected respectively by bolt described at least one at horizontal flange place with the radial both sides of lower nozzle box.
In some optional embodiments, top nozzle room and the lower nozzle box of this nozzle box's device are provided with blade tip seal.
In some optional embodiments, the radial clearance of the top nozzle room of this nozzle box's device and the blade tip seal of lower nozzle box is 0.8mm ~ 1.2mm.
Another object of the present utility model proposes a kind of steam turbine.
In some optional embodiments, this steam turbine comprises above-mentioned nozzle box's device.
Compared with prior art, the beneficial effects of the utility model are:
The utility model provides a kind of nozzle box's device and steam turbine of steam turbine, nozzle box's device of this steam turbine is made up of interconnective top nozzle room and lower nozzle box, this top nozzle room and lower nozzle box are all the inwalls being fixed on inner casing wall at horizontal flange place, so in this nozzle box's device, expand to surrounding in moving vane and nozzle box, expansion direction is consistent, leaf top gas envelope does not need reserved larger radial clearance, simultaneously, in this nozzle box's device, also without preset clearance between top nozzle room and lower nozzle box, like this, the gap air leak amount of the steam turbine of this nozzle box's device is adopted to reduce, the loss caused by air leakage also can reduce, thus drastically increase the efficiency of steam turbine high-pressure cylinder acting.
In order to above-mentioned and relevant object, will describe in detail and the feature particularly pointed out in the claims after one or more embodiment comprises.Explanation below and accompanying drawing describe some illustrative aspects in detail, and its instruction is only some modes in the utilizable various mode of principle of each embodiment.Other benefit and novel features become obvious by considering by reference to the accompanying drawings along with detailed description below, and the disclosed embodiments will comprise all these aspects and theirs is equivalent.
Accompanying drawing explanation
Fig. 1 is the structural representation of nozzle box's device of the steam turbine of the utility model embodiment;
The enlarged diagram at the mouth of pipe place of Tu2Shi Tu1Zhong nozzle box device;
Fig. 3 is the enlarged diagram of Fig. 1 further groove and boss joint;
Fig. 4 is the enlarged diagram of top nozzle room and joint, lower nozzle box in Fig. 1.
Embodiment
The following description and drawings fully show specific embodiments of the present utility model, to enable those skilled in the art to put into practice them.Embodiment only represents possible change.Unless explicitly requested, otherwise independent parts and function are optional, and the order of operation can change.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.The scope of embodiment of the present utility model comprises the gamut of claims, and all obtainable equivalent of claims.In this article, these embodiments of the present utility model can be represented with term " model utility " individually or always, this is only used to conveniently, and if in fact disclose the model utility more than, be not the scope that automatically will limit this application be any single model utility or model utility design.
Now in conjunction with the accompanying drawings, shown in Fig. 1 is the structural drawing of nozzle box's device of steam turbine in some optional embodiments; The enlarged view at the mouth of pipe place of Tu2Shi Tu1Zhong nozzle box device; Fig. 3 is the enlarged view of Fig. 1 further groove and boss joint; Fig. 4 is the enlarged view of top nozzle room and joint, lower nozzle box in Fig. 1.
As shown in figures 1-4, in some optional embodiments, disclose a kind of nozzle box's device of steam turbine, this nozzle box's device comprises: the top nozzle room 2 be connected at horizontal flange 1 place and lower nozzle box 3; Described top nozzle room 2 and lower nozzle box 3 are all being fixedly connected with inner casing wall 4 near horizontal flange 1 place; Described top nozzle room 2 is all connected with inner casing wall 4 by elastic sealing element 6 with the mouth of pipe 5 of lower nozzle box 3.
In concrete implementation process, the joint of top nozzle room 2 and lower nozzle box 3 is designed for gapless, this is because top nozzle room 2 and lower nozzle box 3 are fixed with the inwall of inner casing wall 4 at horizontal flange 1 place to be connected, both are made to be all for fixed point expands to surrounding in the process of acting with horizontal flange 1 place, and moving vane expands to surrounding at the process Zhong Yishiyou center of acting, like this, top nozzle room 2 is all consistent with the expansion direction of moving vane in the process of acting with lower nozzle box 3, preset clearance is not more needed between upper and lower Liang Ge nozzle box, just can well complete the process of acting.The joint of upper and lower Liang Ge nozzle box adopts gapless design, in the prior art of ratio, multiple nozzle box reserves joint the mode in certain gap, reduce the air loss produced by gap between Liang Ge nozzle box greatly, improve the mechanical efficiency of steam turbine high-pressure cylinder.
In some optional embodiments, the elastic sealing element 6 of this nozzle box's device comprises the seal ring of multiple stack setting, this elastic sealing element 6 also can adopt other to have flexible sealed member, as long as can ensure that nozzle box is in the process of acting expansion, this elastic sealing element 6 can produce deformation, can be expanded to surrounding in top nozzle room 2 and lower nozzle box 3, can not leak gas at the mouth of pipe 5 place again simultaneously.At the mouth of pipe 5 place of top nozzle room 2 and lower nozzle box 3, elastic sealing element 6 is set; not only can ensure that steam can not leak at the mouth of pipe 5 place; can ensure again that top nozzle room 2 and lower nozzle box 3 can not have an impact to the sealed member at self and mouth of pipe place when acting is expanded to surrounding simultaneously and cause damage; well protect equipment, add the working life of equipment.
In some optional embodiments, top nozzle room 2 and the lower nozzle box 3 of this nozzle box's device are provided with groove 7 near the radial both sides of horizontal flange 1, simultaneously, the inwall of inner casing wall 4 is provided with the boss 8 with the corresponding clamping of described groove 7, like this, just can top nozzle room 2 and lower nozzle box 3 be fixed on inner casing wall 4 respectively at horizontal flange 1 place, in the process done work in this nozzle box, top nozzle room 2 and lower nozzle box 3 will with the bearing of the radial both sides of horizontal flange 1 for fixed point expand outside circumference, reach together with moving vane to the effect that equidirectional expands, in concrete implementation process, also other links connected that cooperatively interacts can be chosen, by top nozzle room 2 and lower nozzle box 3, at horizontal flange 1 place, be fixed on the inwall of inner casing wall 4.
In some optional embodiments, this nozzle box's device also comprises: at least two bolts 9; Top nozzle room 2 is connected respectively by least one bolt 9 at horizontal flange 1 place with the radial both sides of lower nozzle box 3.In concrete implementation process, other link also can be selected to be connected with lower nozzle box 3 top nozzle room 2.
In some optional embodiments, top nozzle room 2 and the lower nozzle box 3 of this nozzle box's device are provided with blade tip seal, and the radial clearance of the leaf top gas of top nozzle room 2 and lower nozzle box 3 envelope is 0.8mm ~ 1.2mm, preferably 1mm, in prior art, the radial clearance of the leaf top gas envelope of nozzle box is all 2.6mm usually, so, the radial clearance that the radial clearance of the leaf top gas envelope of this nozzle box's device is sealed than the leaf top gas of existing nozzle box is much little, thus decrease the amount of leakage of leaf top steam, reduce the leakage loss on leaf top, drastically increase the mechanical efficiency of steam turbine high-pressure cylinder.
Nozzle box's device of steam turbine of the present utility model is made up of interconnective top nozzle room and lower nozzle box, this top nozzle room and lower nozzle box are all the inwalls being fixed on inner casing at horizontal flange place, so in this nozzle box, expand to surrounding in moving vane and nozzle box, expansion direction is consistent, leaf top gas envelope does not need reserved larger radial clearance, simultaneously, in this nozzle box's device, also without preset clearance between top nozzle room and lower nozzle box, like this, the gap air leak amount of the steam turbine of this nozzle box's device is adopted to reduce, the loss caused by air leakage also can reduce, thus drastically increase the efficiency of steam turbine high-pressure cylinder acting.
In some optional embodiments, disclose a kind of steam turbine, this steam turbine comprises above-mentioned nozzle box's device, after adopting above-mentioned nozzle box's device, this steam turbine, than it existing steam turbine, decreases the loss of air leakage, greatly improves the efficiency of acting.
In a word, the foregoing is only embodiment of the present utility model, only for illustration of principle of the present utility model, be not intended to limit protection domain of the present utility model.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. nozzle box's device of steam turbine, is characterized in that, comprising:
The top nozzle room be connected at horizontal flange place and lower nozzle box;
Described top nozzle room and lower nozzle box are all being fixedly connected with inner casing wall near horizontal flange place;
Described top nozzle room is all connected with inner casing wall by elastic sealing element with the mouth of pipe of lower nozzle box.
2. nozzle box's device of steam turbine according to claim 1, is characterized in that, described elastic sealing element comprises the seal ring that multiple stack is arranged.
3. nozzle box's device of steam turbine according to claim 1, is characterized in that, described top nozzle room and described lower nozzle box are provided with groove near the radial both sides of described horizontal flange; Described inner casing wall is provided with the boss of clamping corresponding to described groove.
4. nozzle box's device of steam turbine according to claim 1, is characterized in that, also comprise: at least two bolts; Described top nozzle room is connected respectively by bolt described at least one at horizontal flange place with the radial both sides of lower nozzle box.
5. nozzle box's device of steam turbine according to claim 1, is characterized in that, described top nozzle room and described lower nozzle box are provided with blade tip seal.
6. nozzle box's device of steam turbine according to claim 5, is characterized in that, the radial clearance of the blade tip seal of described top nozzle room and lower nozzle box is 0.8mm ~ 1.2mm.
7. a steam turbine, is characterized in that, this steam turbine comprises nozzle box's device of the steam turbine described in claim 1 to 6 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520382185.7U CN204729135U (en) | 2015-06-04 | 2015-06-04 | A kind of nozzle box's device of steam turbine and steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520382185.7U CN204729135U (en) | 2015-06-04 | 2015-06-04 | A kind of nozzle box's device of steam turbine and steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204729135U true CN204729135U (en) | 2015-10-28 |
Family
ID=54387494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520382185.7U Active CN204729135U (en) | 2015-06-04 | 2015-06-04 | A kind of nozzle box's device of steam turbine and steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204729135U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437871A (en) * | 2016-11-10 | 2017-02-22 | 中国船舶重工集团公司第七0三研究所 | Overall complete-cycle nozzle chamber of high back pressure turbine |
| CN112412546A (en) * | 2020-11-23 | 2021-02-26 | 东方电气集团东方汽轮机有限公司 | Nozzle chamber of industrial steam turbine without median plane |
-
2015
- 2015-06-04 CN CN201520382185.7U patent/CN204729135U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437871A (en) * | 2016-11-10 | 2017-02-22 | 中国船舶重工集团公司第七0三研究所 | Overall complete-cycle nozzle chamber of high back pressure turbine |
| CN112412546A (en) * | 2020-11-23 | 2021-02-26 | 东方电气集团东方汽轮机有限公司 | Nozzle chamber of industrial steam turbine without median plane |
| CN112412546B (en) * | 2020-11-23 | 2022-01-11 | 东方电气集团东方汽轮机有限公司 | Nozzle chamber of industrial steam turbine without median plane |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204572072U (en) | A kind of mounting structure of moving vane group of turbomachinery | |
| CN104047640B (en) | A kind of brush seal structure of adjustable radial gap | |
| CN204729135U (en) | A kind of nozzle box's device of steam turbine and steam turbine | |
| CN204200279U (en) | A kind of turbine high-temperature heat expansion compensates stator sealing configuration | |
| CN204783137U (en) | High middling pressure integral type inner casing structure of steam turbine | |
| CN110469370A (en) | A kind of adjustable submissive foil honeycomb seal structure of seal clearance | |
| CN206376900U (en) | The gland seal device of high-temperature steam screw machine | |
| CN211397668U (en) | Partial air axial flow type supercritical carbon dioxide turbo expander | |
| CN108019243A (en) | A kind of integral bearing A seating turbine | |
| CN104819015B (en) | Self adaptation dynamic pressure air film compound blade tip sealing device and encapsulating method thereof | |
| CN202866911U (en) | Turbine high-pressure cylinder structure | |
| CN204002940U (en) | A kind of adjustable comb tooth brush seal installation for low temperature environment | |
| CN202417617U (en) | Radial labyrinth gland of turbine | |
| CN201723255U (en) | Assembled mechanical seal structure of screw rod expansion power machine | |
| CN103075204B (en) | Back steam seal device of steam turbine | |
| CN211449789U (en) | Sealing device for preventing steam turbine low-pressure cylinder atmospheric safety valve from implosion | |
| CN208587191U (en) | A kind of sealing gland of steam turbine | |
| CN220015274U (en) | Side tooth steam seal with vortex bottom cavity | |
| CN202360756U (en) | Sealing device of four-in-one set shaft | |
| CN208578590U (en) | The packing of steam turbine combines | |
| CN201059205Y (en) | High pressure cylinder velocity level sealing strip | |
| CN202851091U (en) | Tooth top clearance local resistance-increasing seal tooth type structure | |
| CN201025075Y (en) | Low diameter gas sealer for steamship engine | |
| CN212774761U (en) | Sealing mechanism of high-temperature steam Roots compressor | |
| CN205101050U (en) | Prevent steam turbine axle gland leak -off device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |