CN2735009Y - Last stage blade for large-scale impulse steam turbine - Google Patents
Last stage blade for large-scale impulse steam turbine Download PDFInfo
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- CN2735009Y CN2735009Y CN 200420063143 CN200420063143U CN2735009Y CN 2735009 Y CN2735009 Y CN 2735009Y CN 200420063143 CN200420063143 CN 200420063143 CN 200420063143 U CN200420063143 U CN 200420063143U CN 2735009 Y CN2735009 Y CN 2735009Y
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Abstract
The utility model relates to an end-stage blade for a large-sized impulse steam turbine, relating to an end-stage blade for a large-sized impulse steam turbine, comprise a part of an intermediate body (1), a part of blade type wires (2), a part of blade lacing wires (3), a part of a shroud (4) and a part of a blade root (5), and is characterized in that the part of blade type wires is a variable cross-section twist blade. In other words, relative torsion exists between the two contiguous cross-sections. The cross-section area diminished with the rising of the height of the blade. The height (H) of the part of blade type wires (2) is 710 mm, the part of a blade root (5) is an oblique blade root of fir-tree type, the axial width (K) of the blade root is 182.5 mm, and the total height (L) of the blade root is 105 mm. The utility model can enlarge single-machine capacity, improves hot economic benefits of high-power assembly, can be conveniently assembled, moving blades form connection of a complete ring through the assembly of torsion, is favorable for adjustment and frequency modulation, and ensures the assembly to operate safely with high efficiency under the condition of the change of operation conditions.
Description
Technical field:
The utility model relates to a kind of large-size steam turbine exhaust stage blade, specifically is a kind of large-scale impulse steam turbine exhaust stage blade.
Background technique:
Existing turbine blade is because length of blade and different with its angle of swing that adapts, and it just exists inefficiency, the unsafe problem of working procedure, and existing turbine blade assembling inconvenience; Because shroud is an arch, just there is the defective of easy-rupturing in it.
The model utility content:
The purpose of this utility model is to provide a kind of large-scale impulse steam turbine exhaust stage blade.The utility model can solve existing turbine blade and have inefficiency, dangerous, the easy defective that ruptures of blade of working procedure.It comprises intermediate part 1, vane type line part 2, blade lacing part 3, neckband 4, leaf root part 5; The molded lines of vane type line part 2 is the variable cross section twisted blade, be to have relatively between adjacent two sections to reverse, rising with blade height, its sectional area reduces gradually, the height H of described vane type line part is 710mm, described leaf root part 5 is the vertical tree type tilted blade root, and blade root axial width K is 182.5mm, and the total height L of blade root is 105mm.The utility model can increase single-machine capacity, improves the heat-economy of high-power unit; It adopts and carries shroud, and is easy to assembly, connects by giving turning round to assemble moving vane to be formed put in order to enclose, and can make pitch diameter count upper frequency increase or minimizing by increase and decrease shroud quality, has both helped adjustment and frequency modulation; By changing the defective of arch form shroud fracture in the past, the stress that does not exist riveted joint to cause is concentrated; Rationally control 710mm root of blade degree of reaction, suitably adopt method such as negative angle of attack, thereby the Security of clammy unit exhaust stage blade design and high efficiency are organically combined, make the 710mm blade that higher off design performance be arranged, thereby guarantee unit under variable working condition, operation safely and efficiently.
Description of drawings:
Fig. 1 is the blade structure schematic representation, Fig. 2 is the left view of Fig. 1, Fig. 3 is the plan view of Fig. 1, Fig. 4 is a vane type line part plan view, Fig. 5 is the cooperating structure schematic representation of adjacent two front side of vane positions, Fig. 6 is a mounting structure schematic representation between lacing wire and adjacent two blades, and Fig. 7 is the A-A sectional drawing of Fig. 6.
Embodiment:
In conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 present embodiment is described, blade trailing edge average diameter in the present embodiment is 2045mm, 90 in whole circle blade, it comprises intermediate part 1, vane type line part 2, blade lacing part 3, neckband 4, leaf root part 5 every blade; The molded lines of vane type line part 2 is the variable cross section twisted blade, be to have relatively between adjacent two sections to reverse, rising with blade height, its sectional area reduces gradually, the height H of described vane type line part is 710mm, described leaf root part 5 is the vertical tree type tilted blade root, and blade root axial width K is 182.5mm, and the total height L of blade root is 105mm.In blade height from 0mm～710mm, the axial width of blade is from 131.977mm～36.628mm, chord length is from 133.2301mm～101.1417mm, how much flow inlet angles are from 44.280 degree～161.641 degree, established angle is from 82.0739mm degree～20.2284mm degree, the molded lines maximum ga(u)ge is from 19.280mm～5.800mm, and trailing edge thickness is from 2.892mm～2.616mm.Be respectively 85.41mm in blade height, 213.53mm, 355.00mm, 459.10mm, 624.59mm locate, the axial width of blade is respectively: 125.148mm, 111.778mm, 95.971mm, 79.165mm, 49.769mm, chord length is respectively: 129.3518mm, 123.1000mm, 118.8542mm, 116.5486mm, 106.9708mm, how much flow inlet angles are respectively: 46.960 degree, 55.850 degree, 76.051 degree, 118.351 degree, 149.088 degree, established angle is respectively: 75.2485 degree, 65.0652 degree, 53.6051 degree, 42.4334 degree, 27.2138 degree, the molded lines maximum ga(u)ge is respectively: 17.680mm, 14.400mm, 10.980mm, 8.580mm, 5.800mm trailing edge thickness is respectively: 2.774mm, 2.544mm, 2.276mm, 2.076mm, 1.768mm.
Each cross section basic parameter
The root of blade cross section is for waiting passage leaf grating, and the cross section, middle part is a contraction passage leaf grating, and top cross-section is a scaling type passage leaf grating.Described blade lacing part 3 is partly cutd open loose lacing wire for whole circle is solid, and described lacing wire is formed relatively by the semicircle lacing wire 3-1 of two 10mm, and the position of lacing wire 3 is 461.5mm apart from the root molded lines apart from I.The lacing wire of this structure can reach damping effect, in when work, between adjacent two semicircle lacing wires relative displacement can be arranged on demand, so lacing wire easy-rupturing is not better realized trouble free service.The leaf top is self-crown damping shroud, and this shroud can make blade form an integral body when work and move simultaneously, thus better work; On neckband 4, the normal direction of adjacent two working surface 4-1 is 78.09mm apart from J, assembling of self-crown blade and gap: cooperating between the adjacent blades shroud seen Fig. 5, shroud working surface during the blade assembling, adopt " 0 " gap between ab and cd, like this, can adjust blade frequencies, make blade form an integral body; Non-working surface adopts gap assembling 0.2-0.4mm, like this can be so that assembling and processing easily.
Claims (6)
1. large-scale impulse steam turbine exhaust stage blade, it comprises intermediate part (1), vane type line part (2), blade lacing part (3), neckband (4), leaf root part (5), the molded lines that it is characterized in that vane type line part (2) is the variable cross section twisted blade, be to have relatively between adjacent two sections to reverse, rising with blade height, its sectional area reduces gradually, the height (H) of described vane type line part is 710mm, described leaf root part (5) is the vertical tree type tilted blade root, blade root axial width (K) is 182.5mm, and the total height of blade root (L) is 105mm.
2. large-scale impulse steam turbine exhaust stage blade according to claim 1, it is characterized in that in blade height from 0mm～710mm, the axial width of blade is from 131.977mm～36.628mm, chord length is from 133.2301mm～101.1417mm, how much flow inlet angles are from 44.280 degree～161.641 degree, established angle is from 82.0739mm degree～20.2284mm degree, and the molded lines maximum ga(u)ge is from 19.280mm～5.800mm, and trailing edge thickness is from 2.892mm～2.616mm.
3. large-scale impulse steam turbine exhaust stage blade according to claim 2, it is characterized in that being respectively 85.41mm in blade height, 213.53mm, 355.00mm, 459.10mm, 624.59mm locate, the axial width of blade is respectively: 125.148mm, 111.778mm, 95.971mm, 79.165mm, 49.769mm, chord length is respectively: 129.3518mm, 123.1000mm, 118.8542mm, 116.5486mm, 106.9708mm, how much flow inlet angles are respectively: 46.960 degree, 55.850 degree, 76.051 degree, 118.351 degree, 149.088 degree, established angle is respectively: 75.2485 degree, 65.0652 degree, 53.6051 degree, 42.4334 degree, 27.2138 degree, the molded lines maximum ga(u)ge is respectively: 17.680mm, 14.400mm, 10.980mm, 8.580mm, 5.800mm trailing edge thickness is respectively: 2.774mm, 2.544mm, 2.276mm, 2.076mm, 1.768mm.
4. according to claim 1,2 or 3 described large-scale impulse steam turbine exhaust stage blades, it is characterized in that on described neckband (4) that the normal direction of adjacent two working surfaces (4-1) distance (J) is 78.09mm.
5. according to claim 1,2 or 3 described large-scale impulse steam turbine exhaust stage blades, it is characterized in that described blade lacing part (3) is the whole solid loose lacing wire of partly cuing open of enclosing, described lacing wire is formed relatively by the semicircle lacing wire (3-1) of two 10mm.
6. large-scale impulse steam turbine exhaust stage blade according to claim 4, the position that it is characterized in that described lacing wire (3) is 461.5mm apart from the distance (I) of root molded lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420063143 CN2735009Y (en) | 2004-07-22 | 2004-07-22 | Last stage blade for large-scale impulse steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420063143 CN2735009Y (en) | 2004-07-22 | 2004-07-22 | Last stage blade for large-scale impulse steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2735009Y true CN2735009Y (en) | 2005-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420063143 Expired - Lifetime CN2735009Y (en) | 2004-07-22 | 2004-07-22 | Last stage blade for large-scale impulse steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2735009Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140933A (en) * | 2011-04-29 | 2011-08-03 | 东方电气集团东方汽轮机有限公司 | Final-stage moving blade of wet cooling steam turbine |
| CN102140934A (en) * | 2011-04-29 | 2011-08-03 | 东方电气集团东方汽轮机有限公司 | Last-stage moving blade for 60 Hz wet cooling gas turbine |
| CN102359397A (en) * | 2011-09-26 | 2012-02-22 | 哈尔滨汽轮机厂有限责任公司 | 1300mm moving blade of final stage for full-rotary-speed steam turbine |
| CN110566282A (en) * | 2019-10-24 | 2019-12-13 | 哈尔滨汽轮机厂有限责任公司 | 835mm last-stage moving blade suitable for low-load working condition operation |
-
2004
- 2004-07-22 CN CN 200420063143 patent/CN2735009Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140933A (en) * | 2011-04-29 | 2011-08-03 | 东方电气集团东方汽轮机有限公司 | Final-stage moving blade of wet cooling steam turbine |
| CN102140934A (en) * | 2011-04-29 | 2011-08-03 | 东方电气集团东方汽轮机有限公司 | Last-stage moving blade for 60 Hz wet cooling gas turbine |
| CN102140934B (en) * | 2011-04-29 | 2013-11-27 | 东方电气集团东方汽轮机有限公司 | Last-stage moving blade for 60 Hz wet cooling gas turbine |
| CN102140933B (en) * | 2011-04-29 | 2013-11-27 | 东方电气集团东方汽轮机有限公司 | Final-stage moving blade of wet cooling steam turbine |
| CN102359397A (en) * | 2011-09-26 | 2012-02-22 | 哈尔滨汽轮机厂有限责任公司 | 1300mm moving blade of final stage for full-rotary-speed steam turbine |
| CN102359397B (en) * | 2011-09-26 | 2014-02-26 | 哈尔滨汽轮机厂有限责任公司 | 1300mm moving blade of final stage for full-rotary-speed steam turbine |
| CN110566282A (en) * | 2019-10-24 | 2019-12-13 | 哈尔滨汽轮机厂有限责任公司 | 835mm last-stage moving blade suitable for low-load working condition operation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140722 Granted publication date: 20051019 |