CN204060800U - A kind of small industrial steam turbine double flow source moving vane - Google Patents
A kind of small industrial steam turbine double flow source moving vane Download PDFInfo
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- CN204060800U CN204060800U CN201420442900.7U CN201420442900U CN204060800U CN 204060800 U CN204060800 U CN 204060800U CN 201420442900 U CN201420442900 U CN 201420442900U CN 204060800 U CN204060800 U CN 204060800U
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- blade
- root
- moving vane
- gland sealing
- sealing gear
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- 238000007789 sealing Methods 0.000 claims description 40
- 210000004907 gland Anatomy 0.000 claims description 39
- 230000004323 axial length Effects 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model discloses a kind of small industrial steam turbine governing stage double flow source moving vane, this moving vane comprises: leaf top, blade, blade root, wherein: leaf top, blade and blade root are integrally formed; Leaf top is positioned at the top of blade; The molded line of blade is uniform section prismatic blade, along identical to the section area at top by root on blade height direction, and without reversing between adjacent two sections; Blade root is positioned at the root of blade, is circumferentially assemblied on wheel rim.The utility model during admission simultaneously in high low pressure nozzle double flow source, not only has high security and stability, also has splendid aeroperformance.
Description
Technical field
The utility model relates to motive power machine equipment manufacturing technology field, is specifically related to a kind of small industrial steam turbine double flow source moving vane, is applicable to the situation of the steam admission simultaneously of two kinds of different parameters.
Background technique
Regulating stage blade plays a part Flow-rate adjustment, corresponding with the condition range of industrial steam turbine, the enthalpy drop excursion of industrial steam turbine governing stage is much larger than other level, particularly the situation of two kinds of vapour sources admission be simultaneously other grade unexistent, therefore governing stage has a significant impact steam turbine overall efficiency.Governing-stage moving blade adopts overall self-crown damping shroud and carries axial gland sealing gear, the radial direction that effectively can reduce quiet dynamic gap location leaks vapour, also can improve the mechanical efficiency of two kinds of different steam at governing stage, be one of effective ways improving steam turbine stability and efficiency simultaneously.
Each manufactory due to current industrial steam turbine all adopts conventional design method to carry out the design of governing stage movable vane, the problem of not consideration two kinds of vapour sources admission simultaneously.Different parameters steam enters the speed of movable vane passage and direction exists larger difference, and the enthalpy drop in movable vane passage is not identical yet, and this just makes governing stage stage efficiency decline, and causes very large displacement loss, loss of incidence and mixing loss; Meanwhile, industrial steam turbine throttle flow vary within wide limits, maximum difference more than three times, designs governing stage according to a conventional method, and its efficiency change amplitude is also very large, all has higher efficiency under can not ensureing each operating mode; Meanwhile, the significantly change of governing stage enthalpy drop also causes moving vane flexure stress significantly to change, and affects the long-time safe operation of moving vane; The change of the moving vane temperature that the admission of double flow source causes, stress high frequency has a strong impact on the stable operation of moving vane.Therefore, the design of double flow source moving vane is directly connected to performance and the stability of steam turbine operation, and the design of double flow source movable vane is also the current problem demanding prompt solution of industry Nei Ge institute and R&D institution.
Model utility content
The purpose of this utility model is to provide a kind of small industrial steam turbine double flow source moving vane, can ensure that industrial steam turbine runs safely and reliably, increases work efficiency, to solve the problem of existing industrial steam turbine regulating stage blade inefficiency, job security difference.
A kind of small industrial steam turbine governing stage double flow source moving vane that the utility model proposes comprises: leaf top, blade, blade root, wherein:
Described leaf top, blade and blade root are integrally formed;
Described leaf top is positioned at the top of described blade;
The molded line of blade is uniform section prismatic blade, along identical to the section area at top by root on blade height direction, and without reversing between adjacent two sections;
Described blade root is positioned at the root of described blade, is circumferentially assemblied on wheel rim.
Alternatively, described leaf top is carry shroud damp type shroud with axial gland sealing gear.
Alternatively, described leaf top steam admission side is with the axial gland sealing gear of multiple tracks, and per pass gland sealing gear is circular arc, and with rotor center line parallel.
Alternatively, described root of blade, middle part and top are contraction passage leaf grating.
Alternatively, the top molded line of described leaf top and vane type line part adopts round-corner transition.
Alternatively, described blade root is " T " type blade root with the axial gland sealing gear of multiple tracks, and per pass gland sealing gear is circular arc, and with rotor center line parallel.
Alternatively, the axial length of described gland sealing gear is 3 ~ 5mm, and crown thickness is 0.3 ~ 1.5mm, and gland sealing gear is 1.4mm near the thickness of leaf top or leaf root part, and the radial distance between adjacent gland sealing gear is 3 ~ 5mm.
Alternatively, the axial width on described leaf top is 44mm.
Alternatively, the molded line Partial Height of described blade is 29mm, and root axial width is 40mm, and cross section chord length is 45.451mm, and geometry flow outlet angle is 22.989 °, and established angle is 75.098 °, and blade profile section area is 4.679cm
2, maximum ga(u)ge is 15.588mm, and trailing edge thickness is 0.827mm.
Alternatively, the axial width bottom described blade root is 24mm, is highly 43mm.
The utility model has the advantages that: 1) blade of the present utility model adopts and carries shroud, gland sealing gear structure, effectively can reduce radial leakage vapour, reduce leakage losses and blending, improve unit efficiency; 2) blade under various operating conditions, and the Security of this blade and high efficiency are organically combined, ensure that this blade has excellent Study on Variable Condition Features, namely unit is under variable working condition, also can run efficiently and safely; 3) the utility model adopts and carries shroud structure, and characteristic is good in groups, ensures blade strength; 4) the utility model adopts five road gland sealing gears, does not affect structure stability, thus ensure that the Security of operation; 5) the utility model is with the technique and method means of advanced person design molded line, dramatically reduce the percussion that different vapour source produces movable vane, not only increase the safety in operation of movable vane, also reduce the loss of incidence that admission angle difference causes, thus improve stage efficiency.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of industrial steam turbine double flow source of the present utility model moving vane;
Fig. 2 is the plan view of the double flow of industrial steam turbine shown in Fig. 1 source moving vane;
Fig. 3 is the blade profile geometrical construction schematic diagram according to the utility model one embodiment;
Fig. 4 is shroud according to the utility model one embodiment and blade root position gland sealing gear structural representation;
Fig. 5 is the structural representation of the blade shroud band according to the utility model one embodiment.
Embodiment
For making the purpose of this utility model, technological scheme and advantage clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the utility model is further described.
The utility model combines the fluid situations in governing stage movable vane, the interference to the flowing of the dynamic and static blade wake passing of the MIXING FLOW in two kinds of vapour sources in moving vane leaf grating, Secondary Flow, shock wave and boundary layer form interference between Secondary Flow and many-sided influence factor such as blade strength carries out comprehensive assessment analysis, to some extent solves the problems such as job security existing for the moving vane of existing small industrial steam turbine governing stage double flow source is poor, efficiency is low.
Fig. 1 is the overall structure schematic diagram of a kind of small industrial steam turbine governing stage double flow source of the present utility model moving vane, and in Fig. 1, left side is leading edge; Fig. 2 is the plan view of moving vane shown in Fig. 1; Fig. 3 is the blade profile geometrical construction schematic diagram according to the utility model one embodiment; Fig. 4 is the gland sealing gear geometrical construction schematic diagram according to the utility model one embodiment; Fig. 5 carries shroud damp type shroud structure schematic diagram according to the utility model one embodiment with axial gland sealing gear.
See Fig. 1 ~ 5, the industrial steam turbine governing stage double flow source moving vane that the utility model proposes comprises leaf top 1, blade 2, blade root 3, wherein:
Described leaf top 1, blade 2 and blade root 3 are integrally formed;
Described leaf top 1 is positioned at the top of described blade 2;
The molded line of blade 2 is uniform section prismatic blade, along identical to the section area at top by root in blade 2 short transverse, and without reversing between adjacent two sections, has good aeroperformance and strength character;
Described blade root 3 is positioned at the root of described blade 2, is circumferentially assemblied on wheel rim.
In the utility model one embodiment, described leaf top 1 for carrying shroud damp type shroud with axial gland sealing gear, as shown in Figure 5, further, described leaf top 1 steam admission side is with the axial gland sealing gear 4 of twice, and per pass gland sealing gear is circular arc, and with rotor center line parallel.
In the utility model one embodiment, described blade 2 root, middle part and top are contraction passage leaf grating.
In the utility model one embodiment, described leaf top 1 adopts round-corner transition with the top molded line of blade 2 molded line part.
In the utility model one embodiment, described blade root 3 is " T " type blade root with axial gland sealing gear, and bearing capacity is large, is more suitable for the low power industrial steam turbine regulating stage blade of high rotating speed.Further, described blade root 3 steam admission side is with the three axial gland sealing gears 5 in roads, and per pass gland sealing gear is circular arc, and with rotor center line parallel.Like this, described moving vane just possesses the axial packing of Liao You five road arc-shaped pointed tooth composition.
The gland sealing gear at described shroud 1 and blade root 3 place makes the steam of two kinds of different parameters can freely enter movable vane channel interior, thus decreases radial leakage, effectively improves efficiency.
Fig. 4 is the gland sealing gear structural representation according to the utility model one embodiment, as shown in Figure 4, the axial length of described gland sealing gear is 3 ~ 5mm, is preferably 4mm, crown thickness is 0.3 ~ 1.5mm, gland sealing gear is 1.4mm near the thickness of shroud or leaf root part, and between adjacent twice gland sealing gear, radial distance is 3 ~ 5mm, is preferably 4mm, good seal action can be played, different vapour source only mixes when entering moving vane passage in passage, can not produce radial leakage, thus improve efficiency.Fig. 4 left hand view is depicted as shroud gland sealing gear, and right part of flg is depicted as blade root gland sealing gear, and wherein, shroud gland sealing gear has 2 teeth, and blade root gland sealing gear has 3 teeth.
Particularly, the axial width W1 on described leaf top 1 is 44mm; The molded line Partial Height H1 of blade 2 is 29mm, and the root axial width W2 of blade 2 molded line part is 40mm; Axial width bottom blade root 3 is 24mm, and height H 2 is 43mm.In the utility model one embodiment, the cross section geometric data of described blade 2 molded line part are: chord length b is 45.451mm, and geometry flow outlet angle is 22.989 °, and established angle is 75.098 °, and blade profile section area is 4.679cm
2, maximum ga(u)ge O is 15.588mm, and trailing edge thickness δ is 0.827mm.
Blade of the present utility model adopts the blade profile of particular design, shroud, blade root and packing, ensure that the strength characteristics of blade structure, shroud and blade root with gland sealing gear distribute and ensure that excellent sealing effect; The steam of two kinds of different parameters directly enters in movable vane passage, decreases radial leakage, thus improves the effective security of operation.The straight blade profile of strengthening uniform section adopted, the ways such as conservative control blade surface and Radial pressure distribution, make the Security of this blade and high efficiency organically combine.By the comprehensive analysis and optimization under different steam condition, and consider the relative movement of two kinds of different parameters steam, this blade is made to have higher Study on Variable Condition Features, gland sealing gear all effectively can reduce leakage rate under different operating mode, two kinds of steam are fully done work in movable vane, thus ensure that unit is under different operating mode, also can run safely, efficiently.Blade of the present utility model considers the operating mode of two kinds of vapor (steam) temperature difference 30-100 degree, and under this limited conditions, two kinds of steam also can effectively do work, and two kinds of steam only have minute quantity to leak.Thus ensure that blade stable, safety, Effec-tive Function under different operating mode.
Above-described specific embodiment; the purpose of this utility model, technological scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a small industrial steam turbine governing stage double flow source moving vane, is characterized in that, this moving vane comprises: leaf top, blade, blade root, wherein:
Described leaf top, blade and blade root are integrally formed;
Described leaf top is positioned at the top of described blade;
The molded line of blade is uniform section prismatic blade, along identical to the section area at top by root on blade height direction, and without reversing between adjacent two sections;
Described blade root is positioned at the root of described blade, is circumferentially assemblied on wheel rim.
2. moving vane according to claim 1, is characterized in that, described leaf top is carry shroud damp type shroud with axial gland sealing gear.
3. moving vane according to claim 1, is characterized in that, described leaf top steam admission side is with the axial gland sealing gear of multiple tracks, and per pass gland sealing gear is circular arc, and with rotor center line parallel.
4. moving vane according to claim 1, is characterized in that, described root of blade, middle part and top are contraction passage leaf grating.
5. moving vane according to claim 1, is characterized in that, the top molded line of described leaf top and vane type line part adopts round-corner transition.
6. moving vane according to claim 1, is characterized in that, described blade root is " T " type blade root with the axial gland sealing gear of multiple tracks, and per pass gland sealing gear is circular arc, and with rotor center line parallel.
7. the moving vane according to claim 3 or 6, it is characterized in that, the axial length of described gland sealing gear is 3 ~ 5mm, and crown thickness is 0.3 ~ 1.5mm, gland sealing gear is 1.4mm near the thickness of leaf top or leaf root part, and the radial distance between adjacent gland sealing gear is 3 ~ 5mm.
8. moving vane according to claim 1, is characterized in that, the axial width on described leaf top is 44mm.
9. moving vane according to claim 1, is characterized in that, the molded line Partial Height of described blade is 29mm, root axial width is 40mm, and cross section chord length is 45.451mm, and geometry flow outlet angle is 22.989 °, established angle is 75.098 °, and blade profile section area is 4.679cm
2, maximum ga(u)ge is 15.588mm, and trailing edge thickness is 0.827mm.
10. moving vane according to claim 1, is characterized in that, the axial width bottom described blade root is 24mm, is highly 43mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420442900.7U CN204060800U (en) | 2014-08-07 | 2014-08-07 | A kind of small industrial steam turbine double flow source moving vane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420442900.7U CN204060800U (en) | 2014-08-07 | 2014-08-07 | A kind of small industrial steam turbine double flow source moving vane |
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| Publication Number | Publication Date |
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| CN204060800U true CN204060800U (en) | 2014-12-31 |
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| CN201420442900.7U Expired - Lifetime CN204060800U (en) | 2014-08-07 | 2014-08-07 | A kind of small industrial steam turbine double flow source moving vane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194149A (en) * | 2018-02-11 | 2018-06-22 | 杭州汽轮机股份有限公司 | A kind of industrial steam turbine high efficiency drum grade movable vane piece |
| CN114278391A (en) * | 2021-12-29 | 2022-04-05 | 河北国源电气股份有限公司 | Static blade group for steam turbine of installation close-fitting |
-
2014
- 2014-08-07 CN CN201420442900.7U patent/CN204060800U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194149A (en) * | 2018-02-11 | 2018-06-22 | 杭州汽轮机股份有限公司 | A kind of industrial steam turbine high efficiency drum grade movable vane piece |
| CN108194149B (en) * | 2018-02-11 | 2023-10-13 | 杭州汽轮机股份有限公司 | High-efficient rotary drum level moving blade of industrial steam turbine |
| CN114278391A (en) * | 2021-12-29 | 2022-04-05 | 河北国源电气股份有限公司 | Static blade group for steam turbine of installation close-fitting |
| CN114278391B (en) * | 2021-12-29 | 2024-04-19 | 河北国源电气股份有限公司 | Stator blade group for turbine with tight fit installation |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141231 |