CN212671863U - 378mm secondary final stage moving blade for full-rotating-speed wet cooling steam turbine - Google Patents
378mm secondary final stage moving blade for full-rotating-speed wet cooling steam turbine Download PDFInfo
- Publication number
- CN212671863U CN212671863U CN202021592601.3U CN202021592601U CN212671863U CN 212671863 U CN212671863 U CN 212671863U CN 202021592601 U CN202021592601 U CN 202021592601U CN 212671863 U CN212671863 U CN 212671863U
- Authority
- CN
- China
- Prior art keywords
- blade
- root
- working part
- steam turbine
- full
- 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
Images
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model provides a 378mm time last stage moving blade for on full rotational speed wet cooling steam turbine, the utility model relates to a 378mm time last stage moving blade for on full rotational speed wet cooling steam turbine. The utility model aims at solving the problem that the prior 378mm blade can not meet the requirement of improving the performance of the wet cooling unit. The blade consists of a blade working part, a blade root and a shroud band; the blade working part and the blade root are die forged into a whole from top to bottom; the molded line of the working part of the blade is a twisted blade with a variable cross section, and the cross section area of the working part of the blade is gradually reduced from the root to the top; the wing-shaped shroud rings are connected, the connection strength of the blade is guaranteed by the design of the fir tree blade root, and the blade is made of 0Cr17Ni4Cu4Nb steel. The utility model is used for the full rotational speed thermoelectricity turboset of 200MW and following grade.
Description
Technical Field
The utility model relates to a 378mm time last stage moving blade that is used for wet cold steam turbine of full rotational speed.
Background
The wet cooling unit is a typical traditional unit and has a large market occupation ratio, but in recent years, due to the rapid development of the air cooling unit, the updating and updating development of the blades of the wet cooling unit is slow, and with the improvement of scientific technology and the improvement of design level, the wet cooling unit has the conditions of optimizing the design of the blades of the wet cooling unit and improving the performance of the unit, so that the development of medium and long blades of a wet cooling steam turbine is necessary. The original 378mm blade can not meet the use requirement of improving the performance of the wet cooling unit.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a 378mm time last stage moving blade that is used for wet cold steam turbine of full rotational speed. The problem of the current 378mm blade can't satisfy the user demand that wet cooling unit performance promoted is solved.
The utility model relates to a 378mm secondary final stage moving blade used on a full-rotating-speed wet cooling steam turbine, which comprises a blade working part, a blade root and a shroud band; the blade working part and the blade root are die forged into a whole from top to bottom; the molded line of the working part of the blade is a twisted blade with a variable cross section, and the cross section area of the working part of the blade is gradually reduced from the root to the top; leaf of Chinese characterThe height L of the blade working part is 378mm, the axial width V of the root of the blade working part is 71.06mm, the diameter phi of the root of the blade working part is 1411mm, and the steam exhaust area of the blade working part is 2.12m2The axial width W of the blade root is 86.4mm, the steam inlet edge thickness H1 of the shroud is 13.5mm, the steam outlet edge thickness H2 of the shroud is 7.5mm, and the axial distance B1 of the shroud is 47 mm.
The utility model has the advantages that:
1. the 378mm long blade of the utility model is based on one-dimensional/quasi-three-dimensional/full three-dimensional pneumatic and thermodynamic analysis and calculation, adopts the bending and twisting combined forming full three-dimensional design, the movable blade is twisted along the blade height to form a twisted long blade stage, the post-stage efficiency of the optimized design is improved by 2.21 percent, the top of the blade adopts a self-contained shroud ring, the loss is reduced, the air leakage is reduced, and the unit efficiency is improved; convenient assembly and safe and reliable operation. The invention is applied to the full-speed thermal power steam turbine unit with the grade of 200MW and below.
2. The utility model discloses a fluid dynamic and structural strength are synthesized and are optimized, have solved pneumatics/structure integration design optimization problem, make the through-flow efficiency and the intensity vibration characteristic of 378mm blade all reach the optimum.
3. The last-stage impeller of the steam turbine is provided with 80 moving blades, and the economic efficiency, the strength vibration characteristic, the static strength and the safety and the reliability of the unit are all advanced.
Drawings
FIG. 1 is a schematic view of the overall structure of 378mm secondary final stage moving blades used in a full-speed wet cooling steam turbine according to the present invention;
FIG. 2 is a top view of the shroud;
FIG. 3 is a schematic view of the working portion of the blade and various cross-sectional faults;
FIG. 4 is a representative cross-sectional view of the working portion of the blade;
FIG. 5 is an enlarged view of a portion II of FIG. 4;
fig. 6 is an enlarged view of part i of fig. 4.
Detailed Description
The technical solution of the present invention is not limited to the following specific embodiments, but also includes any combination between the specific embodiments.
The first embodiment is as follows: the embodiment is described with reference to fig. 1, fig. 2 and fig. 3, and the 378mm penultimate moving blade for the full-speed wet cooling steam turbine of the embodiment is composed of a blade working part 1, a blade root 2 and a shroud 3; the blade working part 1 and the blade root 2 are die forged into a whole from top to bottom; the molded line of the working part 1 of the blade is a twisted blade with a variable cross section (namely, two adjacent cross sections are twisted relatively), and the area of the cross section of the working part 1 of the blade is gradually reduced from the root to the top; the height L of the blade working part 1 is 378mm, the axial width V of the root part of the blade working part 1 is 71.06mm, the diameter phi of the root part of the blade working part 1 is 1411mm, and the steam exhaust area of the blade working part 1 is 2.12m2The axial width W of the blade root 2 is 86.4mm, the steam inlet edge thickness H1 of the shroud 3 is 13.5mm, the steam outlet edge thickness H2 is 7.5mm, and the axial distance B1 of the shroud 3 is 47 mm.
In the embodiment, when the whole blade is assembled, the locking sheet is arranged at the blade root to prevent the blade from axially moving; the top of the blade is a self-shrouded damping shroud; the whole blade is loosely assembled (loose assembly means that the shroud and the shroud of the adjacent blade are not contacted), and the shroud of the adjacent blade are contacted by torsion recovery in operation, so that the movable blade forms a whole-circle connection.
The 378mm movable blade profile of the embodiment is connected by the wing-shaped shroud, the connection strength of the blade is ensured by the design of the fir-tree blade root, the shroud and the blade root are more finely designed, and the blade material is 0Cr17Ni4Cu4Nb steel. The post-stage efficiency of the optimized design is improved by 2.21%, and the efficiency is higher on the premise of ensuring the safety of the unit. A safe and efficient new blade type is provided for the transformation of old units and the development of new units.
The second embodiment is as follows: the present embodiment will be described with reference to fig. 4, 5, and 6, and the present embodiment is different from the first embodiment in that: the variation range from the axial width V of the root part of the blade working part 1 to the axial width V1 of the top part of the blade working part 1 is 71.06-42.43 mm, the variation range of the chord length b is 75.57-71.08 mm, the variation range of the installation angle beta is 70.81-36.62 degrees, the variation range of the maximum thickness T of the molded line is 14.16-7.83 mm, the variation range of the inlet angle alpha is 45.82-97.14 degrees, and the variation range of the outlet angle theta is 32.47-18.38 degrees. The rest is the same as the first embodiment.
By adopting the structural parameters, the blade can be easily assembled while the appearance structure size of the blade is ensured to meet the design requirement.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: the axial widths of the blade working parts 1 corresponding to the blade working parts 1 at the root part to top part heights L of 0mm, 94.5mm, 189mm, 283.5mm and 378mm are respectively 71.06mm, 65.69mm, 59mm, 51.08mm and 42.43mm in sequence;
the corresponding chord lengths b are respectively as follows: 75.57mm, 73mm, 70.77mm, 69.78mm, 71.08 mm;
the corresponding installation angles beta are respectively as follows in sequence: 70.81 °, 64.75 °, 56.96 °, 50.35 °, 36.62 °;
the maximum thickness T of the corresponding molded line is respectively as follows: 14.16mm, 13.23mm, 11.69mm, 9.7mm, 7.83 mm;
the corresponding steam inlet angles alpha are respectively as follows in sequence: 45.82 °, 51.56 °, 60.85 °, 75.7 °, 97.14 °;
the corresponding steam outlet angles theta are respectively as follows in sequence: 32.47 °, 29.24 °, 25.83 °, 22.23 °, 18.38 °. The other is the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment mode and one of the first to third embodiment modes is: the blade root 2 is an oblique fir tree blade root. The others are the same as in one of the first to third embodiments.
The fifth concrete implementation mode: the difference between this embodiment and one of the first to fourth embodiments is: the steam inlet edge height K1 of the blade root 2 is 44.27mm, and the steam outlet edge height K2 is 56.53 mm. The other is the same as one of the first to fourth embodiments.
The structure ensures that the blade can be firmly installed in the wheel rim, and the assembly is stable, safe and reliable.
The blade working part 1 consists of 5 sections A-A, B-B, C-C, D-D, E-E which are equally divided into 378mm blade heights, and the parameters of each section are as follows:
Claims (5)
1. a378 mm penult-stage moving blade used on a full-speed wet cooling steam turbine is characterized in that the 378mm penult-stage moving blade used on the full-speed wet cooling steam turbine consists of a blade working part (1), a blade root (2) and a shroud (3); the blade working part (1) and the blade root (2) are die forged into a whole from top to bottom; the molded line of the blade working part (1) is a twisted blade with a variable cross section, and the cross section area of the blade working part (1) from the root to the top is gradually reduced; the height of the blade working part (1) is 378mm, the axial width of the root part of the blade working part (1) is 71.06mm, the diameter of the root part of the blade working part (1) is 1411mm, and the steam exhaust area of the blade working part (1) is 2.12m2The axial width of the blade root (2) is 86.4mm, the thickness of the steam inlet edge of the shroud band (3) is 13.5mm, the thickness of the steam outlet edge of the shroud band (3) is 7.5mm, and the axial distance of the shroud band (3) is 47 mm.
2. The 378mm penultimate moving blade for use in a full speed wet cooled steam turbine according to claim 1, wherein the range of variation from the axial width of the root of the blade working portion (1) to the axial width of the tip of the blade working portion (1) is 71.06mm to 42.43mm, the range of variation of chord length is 75.57mm to 71.08mm, the range of variation of setting angle is 70.81 to 36.62 °, the range of variation of maximum thickness of molded line is 14.16mm to 7.83mm, the range of variation of inlet angle is 45.82 to 97.14 °, and the range of variation of outlet angle is 32.47 to 18.38 °.
3. The 378mm penultimate moving blade for use in a full speed wet cooled steam turbine according to claim 1, wherein the axial widths of the blade working parts (1) corresponding to the root to tip heights of the blade working parts (1) of 0mm, 94.5mm, 189mm, 283.5mm, 378mm are 71.06mm, 65.69mm, 59mm, 51.08mm, 42.43mm, respectively, in this order;
the corresponding chord lengths are respectively as follows: 75.57mm, 73mm, 70.77mm, 69.78mm, 71.08 mm;
the corresponding installation angles are respectively as follows in sequence: 70.81 °, 64.75 °, 56.96 °, 50.35 °, 36.62 °;
the maximum thickness of the corresponding molded line is respectively as follows: 14.16mm, 13.23mm, 11.69mm, 9.7mm, 7.83 mm;
the corresponding steam inlet angles are respectively as follows in sequence: 45.82 °, 51.56 °, 60.85 °, 75.7 °, 97.14 °;
the corresponding steam outlet angles are respectively as follows in sequence: 32.47 °, 29.24 °, 25.83 °, 22.23 °, 18.38 °.
4. The 378mm penult rotor blade for a full speed wet cooled steam turbine according to claim 1, characterized in that the blade root (2) is a slanted fir tree root.
5. The 378mm penultimate moving blade for a full speed wet cooled steam turbine according to claim 1, characterized in that the blade root (2) has a steam inlet edge height of 44.27mm and a steam outlet edge height of 56.53 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021592601.3U CN212671863U (en) | 2020-08-04 | 2020-08-04 | 378mm secondary final stage moving blade for full-rotating-speed wet cooling steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021592601.3U CN212671863U (en) | 2020-08-04 | 2020-08-04 | 378mm secondary final stage moving blade for full-rotating-speed wet cooling steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212671863U true CN212671863U (en) | 2021-03-09 |
Family
ID=74820936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021592601.3U Active CN212671863U (en) | 2020-08-04 | 2020-08-04 | 378mm secondary final stage moving blade for full-rotating-speed wet cooling steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212671863U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879102A (en) * | 2021-04-01 | 2021-06-01 | 哈尔滨汽轮机厂有限责任公司 | 1000mm final-stage moving blade for 3000rpm full-speed steam turbine |
-
2020
- 2020-08-04 CN CN202021592601.3U patent/CN212671863U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879102A (en) * | 2021-04-01 | 2021-06-01 | 哈尔滨汽轮机厂有限责任公司 | 1000mm final-stage moving blade for 3000rpm full-speed steam turbine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201581936U (en) | Special last-stage vane for large-scale 60Hz turbine | |
| CN212671863U (en) | 378mm secondary final stage moving blade for full-rotating-speed wet cooling steam turbine | |
| CN109915407B (en) | Centrifugal pump impeller with non-smooth surface and efficiency and noise cooperative improvement design method thereof | |
| EP2176521B1 (en) | Steam turbine stage | |
| CN211525182U (en) | Swept-curved blade and axial flow fan | |
| CN212716770U (en) | 450mm final-stage moving blade for 50MW full-speed air-cooled steam turbine | |
| CN102080575A (en) | High-efficiency mixed flow turbine | |
| CN208564639U (en) | For the 780mm final stage moving blade on full revolving speed air-cooled steam turbine | |
| CN212272314U (en) | 2000mm last-stage moving blade for half-speed nuclear turbine | |
| CN214837351U (en) | Efficient cross-flow wind wheel | |
| CN213088083U (en) | 360mm last-stage moving blade for full-rotating-speed air-cooled condensing steam turbine | |
| CN2828322Y (en) | Final stage, penultimate vane of large full speed steam turbine | |
| CN114673683A (en) | Improved S-shaped bidirectional tubular pump impeller | |
| CN203067037U (en) | Turbine of turbocharger | |
| CN111828097A (en) | 2000mm last-stage moving blade for half-speed nuclear turbine | |
| CN2851583Y (en) | Penult-stage twisted blades of large-sized full-speed steam turbine | |
| CN108194150B (en) | Large-load efficient regulating-stage stationary blade of industrial steam turbine | |
| CN108194149B (en) | High-efficient rotary drum level moving blade of industrial steam turbine | |
| CN108266234B (en) | Efficient rotary drum-level stator blade of industrial steam turbine | |
| CN216446976U (en) | Medium-pressure last-stage 315mm moving blade based on small enthalpy drop blade profile | |
| CN202091249U (en) | Intermediate-stage blade of gas compressor with hub diameter of Phi 564mm | |
| KR20130087715A (en) | Axial flow fan | |
| CN220118193U (en) | 680mm final-stage long blade for axial-flow air turbine | |
| CN213478400U (en) | 459mm last-stage moving blade of high-speed turbine for 25 MW-stage environment-friendly energy power generation | |
| CN203067036U (en) | Novel turbocharger turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |