CN208564639U - For the 780mm final stage moving blade on full revolving speed air-cooled steam turbine - Google Patents
For the 780mm final stage moving blade on full revolving speed air-cooled steam turbine Download PDFInfo
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- CN208564639U CN208564639U CN201820620208.7U CN201820620208U CN208564639U CN 208564639 U CN208564639 U CN 208564639U CN 201820620208 U CN201820620208 U CN 201820620208U CN 208564639 U CN208564639 U CN 208564639U
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Abstract
The utility model is related to the air-cooled thermal power steam turbine low-pressure final stage moving blade of large-scale full revolving speed for the 780mm final stage moving blade on full revolving speed air-cooled steam turbine, and in particular to a kind of 780mm final stage moving blade.Purpose is to overcome the problems, such as that inconvenient assembly, flow efficiency and strength vibration characteristic are low, provide a kind of 780mm final stage moving blade on full revolving speed air-cooled steam turbine, including blade working part, blade root and shroud, successively die forging is structure as a whole for shroud, blade working part and blade root；The area of section of the blade working part from root to top is gradually reduced；Blade root is helical teeth fir tree shape, and the blade root axial width of the blade root is 312mm；Shroud is 36mm with a thickness of 16mm, working face axial distance.The utility model reduces gas leakage, improves unit efficiency；It is easy to assembly, it is safe and reliable to operation.The flow efficiency and strength vibration characteristic for making 780mm blade all optimize.
Description
Technical field
The utility model relates to the air-cooled thermal power steam turbine low-pressure final stage moving blades of large-scale full revolving speed, and in particular to a kind of
780mm final stage moving blade.
Background technique
Air cooling unit is a kind of typical variable parameter operation unit, and design back-pressure is high and economy range is big, final stage
The operating condition of blade is very severe.Therefore, there is its particularity for the exhaust stage blade of air cooling unit, exploitation more adapts to air-cooled
The exhaust stage blade of the steam turbine market demand becomes certainty.
Existing 780mm linear leaf has the shortcomings that gas leakage, and unit efficiency is caused to reduce；And assemble inconvenience；Flow efficiency
Work requirements are all unable to satisfy with strength vibration characteristic.
Utility model content
The purpose of this utility model is to overcome existing 780mm linear leaf assembly inconvenience, flow efficiency and strength vibrations
The low problem of characteristic provides a kind of 780mm final stage moving blade on full revolving speed air-cooled steam turbine.
The utility model is installed for the 780mm final stage moving blade on full revolving speed air-cooled steam turbine, including 74 ring weeks
In the blade of steam turbine last stage impeller, each blade includes blade working part, blade root and shroud, shroud, blade working portion
Point successively die forging is structure as a whole with blade root；
The height of blade working part is 780mm, the blade axial width of blade working part root is 235.16mm, root
Portion's diameter is 1670mm, leaving area 6.00m2；The area of section of the blade working part from root to top be gradually reduced,
And there is relative torsion between adjacent two sections；The blade axial width of blade working part root is axial to blade working atop part
The variation range of width is 235.16mm~32.97mm, the variation range of chord length is 241.39mm~145.53mm, established angle
Variation range is 77.43 °~11.27 °, the variation range of molded line maximum gauge is 27.47mm~6.10mm, the variation of inlet angle
Range is 59.46 °~166.14 °, and the variation range of the angle of outlet is 33.65 °~16.10 °；
Blade root is helical teeth fir tree shape, and the blade root axial width of the blade root is 312mm；
Shroud is 36mm with a thickness of 16mm, working face axial distance, and between being equipped between the shroud 3 between adjacent blades
Away from.
The beneficial effects of the utility model are:
One, 780mm linear leaf of the present invention is used based on one-dimensional/quasi- three-dimensional/full three-dimensional pneumatic, thermodynamic analysis calculating
Bending united forming full three dimensional design, movable vane form distortion long blade stage along leaf high twist, vane tip using included shroud,
Loss is reduced, top can assemble multi-disc gland sealing gear, reduce gas leakage, improve unit efficiency；It is easy to assembly, it is safe and reliable to operation.This
Invention is applied in the full revolving speed thermal power steam turbine group of 660MW grade, can satisfy different regions, different user is to air cooling unit
Demand, greatly strengthen the market competitiveness；
Two, the present invention uses fluid dynamic and structural strength complex optimum, solves pneumatic/structure-integrated design optimization
Problem optimizes the flow efficiency of 780mm blade and strength vibration characteristic all；
Three, a circle has 74 movable vane pieces on steam turbine last stage impeller, in economy, strength vibration characteristic, static strength and guarantor
Advanced international level is reached in terms of the security reliability for demonstrate,proving unit.
Detailed description of the invention
Fig. 1 is the single blade for the 780mm final stage moving blade on full revolving speed air-cooled steam turbine of the utility model
Side structure schematic view；
Fig. 2 is the vertical view of the shroud for the 780mm final stage moving blade on full revolving speed air-cooled steam turbine of the utility model
Structural schematic diagram；
Fig. 3 is the blade working portion for the 780mm final stage moving blade on full revolving speed air-cooled steam turbine of the utility model
Each section tomography is divided to overlap schematic diagram；
Fig. 4 is the blade working portion for the 780mm final stage moving blade on full revolving speed air-cooled steam turbine of the utility model
Divide cross-sectional view；
Fig. 5 is II partial enlarged view of Fig. 4；
Fig. 6 is I partial enlarged view of Fig. 4.
Specific embodiment
Specific embodiment one
As shown in Fig. 1~Fig. 6, the 780mm final stage moving blade on full revolving speed air-cooled steam turbine, including blade working portion
Divide 1, blade root 2 and shroud 3, successively die forging is structure as a whole for shroud 3, blade working part 1 and blade root 2；
The height L of blade working part 1 is 780mm, the blade axial width V of 1 root of blade working part is
235.16mm, root diameter (RD) 1670mm, leaving area 6.00m2；The section of the blade working part 1 from root to top
Area is gradually reduced and has relative torsion between adjacent two sections；The blade axial width V of 1 root of blade working part is to blade
The variation range of 1 top axial width V1 of working portion is 235.16mm~32.97mm, the variation range of chord length b is
241.39mm~145.53mm, established angle β y variation range be 77.43 °~11.27 °, the variation range of molded line maximum gauge T
Variation range for 27.47mm~6.10mm, inlet angle α is 59.46 °~166.14 °, and the variation range of angle of outlet θ is
33.65 °~16.10 °；
Blade root 2 is helical teeth fir tree shape, and the blade root axial width W of the blade root 2 is 312mm；
The thickness H of shroud 3 is 16mm, working face axial distance B1 is 36mm.
Lock sheet, which is packed into, when assembling entire blade, at blade root 2 avoids blade axial jump；The shroud 3 on leaf top is included
Hat damping shroud；Entire blade pine assembly (pine assembly is exactly not contact between the shroud of adjacent blades and shroud), when operation, lead to
Twist recovery is crossed, shroud and the shroud contact of adjacent blades make movable vane piece form round linking.
Parameter using the above structure can also make leaf while guaranteeing that the contour structure size of blade meets design requirement
Piece is easy assembly.
Specific embodiment two
As shown in Fig. 1, Fig. 3~Fig. 6, present embodiment two and the difference of specific embodiment one are, blade work
Making relative altitude of the part 1 from root to top is 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80% and 90%
The height L that place corresponds to blade working part 1 respectively be 78mm, 156mm, 234mm, 312mm, 390mm, 468mm,
546mm, 624mm and 702mm, the blade axial width V of corresponding blade working part 1 respectively be 195.54mm,
167.49mm, 143.48mm, 121.33mm, 101.40mm, 84.64mm, 69.54mm, 54.43mm and 41.57mm, corresponding string
Long b respectively be 202.98mm, 179.44mm, 162.99mm, 152.42mm, 146.85mm, 145.53mm, 145.89mm,
146.81mm and 148.58mm, corresponding established angle β y respectively be 74.94 °, 69.43 °, 62.04 °, 52.96 °,
43.69 °, 35.41 °, 28.16 °, 20.86 ° and 15.06 °, corresponding molded line maximum gauge T respectively be 27.47mm,
27.18mm, 26.42mm, 24.41mm, 20.94mm, 16.92mm, 11.67mm, 7.98mm and 6.18mm, corresponding inlet angle α
Respectively be 60.36 °, 61.02 °, 68.53 °, 77.62 °, 81.20 °, 100.49 °, 123.82 °, 141.00 ° and
154.74 °, corresponding angle of outlet θ respectively be 33.07 °, 32.23 °, 31.40 °, 29.69 °, 26.94 °, 23.62 °,
22.09 °, 23.20 ° and 20.73 °.
Also, each section design parameter of blade working part 1 is as follows:
Specific embodiment three
As shown in Figure 1, present embodiment three and the difference of specific embodiment one are, the total height L of blade root 2 is
86.08mm。
This structure enables blade to be packed into wheel rim securely, and assembly stablizes, is safe and reliable.
Specific embodiment four
As shown in Figure 1, present embodiment four and the difference of specific embodiment one are, blade working part 1
Air inlet side is equipped with laser solution strengthening area 4, the laser solution strengthening area 4 close to shroud 3.
Claims (3)
1. for the 780mm final stage moving blade on full revolving speed air-cooled steam turbine, including being mounted on steam turbine last stage leaf in 74 ring weeks
The blade of wheel, each blade include working portion (1), blade root (2) and shroud (3), which is characterized in that shroud (3), blade work
Making partially (1) and blade root (2), successively die forging is structure as a whole；
The height (L) of blade working part (1) is 780mm, the blade axial width (V) of blade working part (1) root is
235.16mm, root diameter (RD) 1670mm, leaving area 6.00m2；The blade working part (1) cutting from root to top
Face area is gradually reduced and has relative torsion between adjacent two sections；The blade axial width (V) of blade working part (1) root
The variation range of axial width (V1) is the variation of 235.16mm~32.97mm, chord length (b) at the top of to blade working part (1)
Range is 241.39mm~145.53mm, the variation range of established angle (β y) is 77.43 °~11.27 °, molded line maximum gauge (T)
Variation range be 27.47mm~6.10mm, the variation range of inlet angle (α) be 59.46 °~166.14 °, the angle of outlet (θ)
Variation range is 33.65 °~16.10 °；
Blade root (2) is helical teeth fir tree shape, and the blade root axial width (W) of the blade root (2) is 312mm；
The thickness (H) of shroud (3) is 16mm, working face axial distance (B1) is 36mm, and the shroud (3) between adjacent blades it
Between be equipped with spacing；
The air inlet side of blade working part (1) is equipped with laser solution strengthening area (4), the laser solution strengthening area (4) close to shroud
(3)。
2. the 780mm final stage moving blade according to claim 1 on full revolving speed air-cooled steam turbine, which is characterized in that
Relative altitude of the blade working part (1) from root to top be 10%, 20%, 30%, 40%, 50%, 60%, 70%,
At 80% and 90% the height (L) of corresponded to blade working part (1) respectively be 78mm, 156mm, 234mm, 312mm,
The blade axial width (V) of 390mm, 468mm, 546mm, 624mm and 702mm, corresponding blade working part (1) are successively distinguished
For 195.54mm, 167.49mm, 143.48mm, 121.33mm, 101.40mm, 84.64mm, 69.54mm, 54.43mm and
41.57mm, corresponding chord length (b) respectively be 202.98mm, 179.44mm, 162.99mm, 152.42mm, 146.85mm,
145.53mm, 145.89mm, 146.81mm and 148.58mm, corresponding established angle (β y) respectively be 74.94 °, 69.43 °,
62.04 °, 52.96 °, 43.69 °, 35.41 °, 28.16 °, 20.86 ° and 15.06 °, corresponding molded line maximum gauge (T) is successively divided
Not Wei 27.47mm, 27.18mm, 26.42mm, 24.41mm, 20.94mm, 16.92mm, 11.67mm, 7.98mm and 6.18mm, institute
Corresponding inlet angle (α) respectively be 60.36 °, 61.02 °, 68.53 °, 77.62 °, 81.20 °, 100.49 °, 123.82 °,
141.00 ° and 154.74 °, the corresponding angle of outlet (θ) respectively be 33.07 °, 32.23 °, 31.40 °, 29.69 °, 26.94 °,
23.62 °, 22.09 °, 23.20 ° and 20.73 °.
3. the 780mm final stage moving blade according to claim 1 on full revolving speed air-cooled steam turbine, which is characterized in that
The total height (L) of blade root (2) is 86.08mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820620208.7U CN208564639U (en) | 2018-04-27 | 2018-04-27 | For the 780mm final stage moving blade on full revolving speed air-cooled steam turbine |
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| CN201820620208.7U CN208564639U (en) | 2018-04-27 | 2018-04-27 | For the 780mm final stage moving blade on full revolving speed air-cooled steam turbine |
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| CN208564639U true CN208564639U (en) | 2019-03-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989792A (en) * | 2019-05-24 | 2019-07-09 | 哈尔滨汽轮机厂有限责任公司 | Full rotary speed steam turbine final stage moving blade |
| CN111911239A (en) * | 2020-09-01 | 2020-11-10 | 杭州汽轮动力集团有限公司 | Full-speed turbine last-stage moving blade |
-
2018
- 2018-04-27 CN CN201820620208.7U patent/CN208564639U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989792A (en) * | 2019-05-24 | 2019-07-09 | 哈尔滨汽轮机厂有限责任公司 | Full rotary speed steam turbine final stage moving blade |
| CN111911239A (en) * | 2020-09-01 | 2020-11-10 | 杭州汽轮动力集团有限公司 | Full-speed turbine last-stage moving blade |
| CN111911239B (en) * | 2020-09-01 | 2022-07-22 | 杭州汽轮动力集团有限公司 | Full-rotating-speed turbine last-stage moving blade |
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