CN2828321Y - Penultimate vane of large air-cooling steam turbine - Google Patents
Penultimate vane of large air-cooling steam turbine Download PDFInfo
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- CN2828321Y CN2828321Y CN 200520021746 CN200520021746U CN2828321Y CN 2828321 Y CN2828321 Y CN 2828321Y CN 200520021746 CN200520021746 CN 200520021746 CN 200520021746 U CN200520021746 U CN 200520021746U CN 2828321 Y CN2828321 Y CN 2828321Y
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Abstract
The utility model relates to a penultimate blade of a large air-cooling steam turbine which is a steam turbine blade. In order to solve the problems of inefficient work efficiency and unsafe working process in the existing steam turbine blade, the utility model is composed of a surrounding belt part (1), a blade molded line part (2), an intermediate body part (3) and a blade root part (4), wherein the blade molded line part (2) is provided with a variable section twist blade. The position between two adjacent sections relatively twists, and the height H of the blade molded line part (2) is 352 mm. As the height of the blade is raised, the section area is gradually reduced, the blade root part (4) is four fork type blade roots with equal strength, and the axial width W of the blade root is 125 mm. The total height K of the blade root is 23.61 mm, and the utility model can be suitable for a penultimate blade of an air cooling steam turbine of 300MW-600M. Economy, strength vibration property, static strength and the safety aspect of a machine set all reach an advanced level.
Description
Technical field
The utility model relates to a kind of turbine blade.
Background technique
Air-cooled Unit is a kind of typical variable parameter operation unit, with respect to clammy unit, the design back pressure height and the back pressure excursion of Air-cooled Unit are big, the variation of ambient temperature scope of atmosphere is big to be caused exhaust stage blade to satisfy to move under the air blast operating mode by blocking operating mode, no matter in low back pressure, block under operating mode or high back pressure, the air blast situation, the operating conditions of low pressure end two grade blades is all very abominable.Existing air cooling turbine blade exists inefficiency, the unsafe problem of working procedure under abominable variable working condition, and the assembling of existing turbine blade is inconvenient; Because existing arched cover band and blade are riveted joints, easily produce stress in riveted joint place and concentrate, so there is the defective of easy-rupturing.
The model utility content
For solving existing air cooling turbine blade under abominable variable working condition, there are inefficiency, the unsafe problem of working procedure, and then a kind of large air-cooled turbine machine second last stage blade is provided, it is made up of neckband, vane type line part, a body portion and leaf root part; Vane type line partly is the variable cross section twisted blade, has relatively between promptly adjacent two sections and reverses, and the height H of described vane type line part is 352mm, and with the rising of blade height, the section area of this blade reduces gradually; Leaf root part is a vertical tree type circular arc blade root, and the axial width W of blade root is 125mm, and the total height K of blade root is 23.61mm.The utility model adopts the shroud technology that carries, it makes that tip leak is few and has improved top flox condition, has improved stress because contact-type connects simultaneously, makes blade and shroud all have good static(al) and dynamic property, easy to assembly, the whole and frequency modulation of You Li Yu Tone; By rational flow Field Design, described second last stage blade not only has higher efficient when design conditions, even root the separation of flow can not occur yet when back pressure is high, changes the defective of arch form shroud fracture in the past, the problem of stress concentration that does not exist riveted joint to cause; By reasonable control 352mm root of blade degree of reaction, suitably adopt measures such as negative angle of attack, thereby the Security of clammy unit second last stage blade design and high efficiency are organically combined, make the 352mm blade that higher off design performance be arranged, thereby guarantee unit under variable working condition, safely and efficiently operation.No matter the utility model is in Economy applicable to the inferior final blades of 300MW～600M air cooling turbine, and the safety reliability aspect of strength vibration characteristic, static strength and assurance unit all reaches advanced level.
Description of drawings
Fig. 1 is an overall structure schematic representation of the present utility model, Fig. 2 is the left view of Fig. 1, Fig. 3 is the plan view of Fig. 1, Fig. 4 is the plan view of vane type line part 2, Fig. 5 is the cooperating structure schematic representation of neckband 1 adjacent two working surface 1-1 positions, Fig. 6 is the structural representation of leaf root part 4 by Cock screw 5 lockings, and Fig. 7 is the N portion enlarged view of Fig. 6.
Embodiment
Embodiment one: (referring to Fig. 1-Fig. 7) present embodiment is made up of neckband 1, vane type line part 2, a body portion 3 and leaf root part 4; Vane type line part 2 is the variable cross section twisted blade, be to have relatively between adjacent two sections to reverse, the height H of described vane type line part 2 is 352mm, rising with blade height, the section area of this blade reduces gradually, the axial width of this blade from 97.860mm～38.516mm, chord length from 105.5417mm～91.6765mm, how much exit angle do corresponding change from 19.8931mm～7.1882mm, trailing edge thickness from 2.124mm～1.857mm from 21.3918 °～14.9201 °, established angle from 68.3069 °～24.3886 °, molded lines thickness; Be respectively 26.73mm in blades height, 149.36mm, 253.29mm, 316.34mm locate, the axial width of this blade is corresponding to be respectively: 95.410mm, 78.533mm, 59.913mm, 45.952mm, chord length is corresponding to be respectively: 104.6647mm, 98.8122mm, 95.8849mm, 93.0482mm, how much exit angle is corresponding is respectively: 20.8669 °, 18.6568 °, 16.8037 °, 15.4830 °, established angle is corresponding to be respectively: 66.0066 °, 52.7265 °, 38.5045 °, 29.2308 °, molded lines thickness is corresponding to be respectively: 19.3887mm, 15.2561mm, 11.7717mm, 9.0716mm trailing edge thickness is corresponding to be respectively: 2.078mm, 1.998mm, 1.952mm, 1.920mm; Leaf root part 4 is a vertical tree type circular arc blade root, and the axial width W of blade root is 125mm, and the total height K of blade root is 23.61mm.The normal direction of last adjacent two the working surface 1-1 of neckband (1) is 77.26mm apart from J; Matching gap between the adjacent blades shroud, as shown in Figure 5, the working surface 1-1 of blade when assembling shroud adopts " 0 " gap, and cooperating between the ab that sees Fig. 5 and cd, non-working surface adopts the assembling of 0.4-0.8mm gap.Second last stage blade described in the utility model is applicable to the inferior final blades of 300MW～600M air cooling turbine, one circle has 98, blade is packed into to impeller steam output side direction by the steam admission side of impeller, when blade is packed into, semi-circle pin holes on intermediate semi-circle pin holes and the race is put into the Cock screw 5 of packing into after being aligned to circular hole 6, avoids sharf to jumping; Pack into behind the Cock screw 5 should be on intermediate ca(u)lk, prevent that screw from getting loose, as Fig. 6, shown in Figure 7.
Concrete parameter in each cross section such as following table:
| Project | Blade height l | Axial width B | Chord length b | How much exit angle β 1j | Established angle β y | Molded lines maximum ga(u)ge Dmax | Trailing edge thickness δ |
| The cross section | mm | mm | mm | Degree | Degree | mm | mm |
| A-A | 0.0 | 97.860 | 105.5417 | 21.3918 | 68.3069 | 19.8931 | 2.124 |
| B-B | 26.73 | 95.410 | 104.6647 | 20.8669 | 66.0066 | 19.3887 | 2.078 |
| C-C | 53.37 | 92.673 | 103.5892 | 20.8944 | 63.7206 | 18.6579 | 2.038 |
| D-D | 101.94 | 86.157 | 101.4512 | 19.3744 | 58.3183 | 16.9600 | 1.998 |
| E-E | 149.36 | 78.533 | 98.8122 | 18.6568 | 52.7265 | 15.2561 | 1.998 |
| F-F | 183.45 | 72.993 | 97.7971 | 18.0666 | 48.2877 | 14.2446 | 1.998 |
| G-G | 217.54 | 66.772 | 96.7823 | 17.3681 | 43.5613 | 12.8163 | 1.952 |
| H-H | 253.29 | 59.913 | 95.8849 | 16.8037 | 38.5045 | 11.7717 | 1.952 |
| I-I | 283.65 | 53.242 | 94.8278 | 16.0943 | 33.9048 | 9.8762 | 1.920 |
| J-J | 316.34 | 45.952 | 93.0482 | 15.4830 | 29.2308 | 9.0716 | 1.920 |
| K-K | 352.00 | 38.516 | 91.6765 | 14.9201 | 24.3886 | 7.1882 | 1.857 |
Claims (4)
1, a kind of large air-cooled turbine machine second last stage blade, it is made up of neckband (1), vane type line part (2), a body portion (3) and leaf root part (4), 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, the height H of described vane type line part (2) is 352mm, with the rising of blade height, the section area of this blade reduces gradually; Leaf root part (4) is four forked type equal strength blade roots, and the axial width W of blade root is 125mm, and the total height K of blade root is 23.61mm.
2, a kind of large air-cooled turbine machine second last stage blade according to claim 1, it is characterized in that rising with blade height, the axial width of this blade from 97.860mm～38.516mm, chord length from 105.5417mm～91.6765mm, how much exit angle do corresponding change from 19.8931mm～7.1882mm, trailing edge thickness from 2.124mm～1.857mm from 21.3918 °～14.9201 °, established angle from 68.3069 °～24.3886 °, molded lines thickness.
3, a kind of large air-cooled turbine machine second last stage blade according to claim 2, it is characterized in that being respectively 26.73mm in blades height, 149.36mm, 253.29mm, 316.34mm locate, the axial width of this blade is corresponding to be respectively: 95.410mm, 78.533mm, 59.913mm, 45.952mm, chord length is corresponding to be respectively: 104.6647mm, 98.8122mm, 95.8849mm, 93.0482mm, how much exit angle is corresponding is respectively: 20.8669 °, 18.6568 °, 16.8037 °, 15.4830 °, established angle is corresponding to be respectively: 66.0066 °, 52.7265 °, 38.5045 °, 29.2308 °, molded lines thickness is corresponding to be respectively: 19.3887mm, 15.2561mm, 11.7717mm, 9.0716mm trailing edge thickness is corresponding to be respectively: 2.078mm, 1.998mm, 1.952mm, 1.920mm.
4,, it is characterized in that being 77.26mm in the normal direction distance (J) of last adjacent two working surfaces of described neckband (1) (1-1) according to claim 1,2 or 3 described a kind of large air-cooled turbine machine second last stage blades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520021746 CN2828321Y (en) | 2005-10-12 | 2005-10-12 | Penultimate vane of large air-cooling steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520021746 CN2828321Y (en) | 2005-10-12 | 2005-10-12 | Penultimate vane of large air-cooling steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2828321Y true CN2828321Y (en) | 2006-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520021746 Expired - Lifetime CN2828321Y (en) | 2005-10-12 | 2005-10-12 | Penultimate vane of large air-cooling steam turbine |
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| Country | Link |
|---|---|
| CN (1) | CN2828321Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101737091B (en) * | 2009-12-28 | 2012-11-14 | 东方电气集团东方汽轮机有限公司 | Last-stage moving blade of air-cooled feed pump steam turbine |
| CN111963253A (en) * | 2020-09-03 | 2020-11-20 | 杭州汽轮机股份有限公司 | Penultimate-stage moving blade of steam turbine of full-capacity feed pump of power station |
-
2005
- 2005-10-12 CN CN 200520021746 patent/CN2828321Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101737091B (en) * | 2009-12-28 | 2012-11-14 | 东方电气集团东方汽轮机有限公司 | Last-stage moving blade of air-cooled feed pump steam turbine |
| CN111963253A (en) * | 2020-09-03 | 2020-11-20 | 杭州汽轮机股份有限公司 | Penultimate-stage moving blade of steam turbine of full-capacity feed pump of power station |
| CN111963253B (en) * | 2020-09-03 | 2022-12-16 | 杭州汽轮动力集团股份有限公司 | Penultimate-stage moving blade of steam turbine of full-capacity feed pump of power station |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20061018 |
|
| EXPY | Termination of patent right or utility model |