CN212985300U - 530 mm-time final-stage moving blade for full-speed ultra-supercritical steam turbine - Google Patents
530 mm-time final-stage moving blade for full-speed ultra-supercritical steam turbine Download PDFInfo
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- CN212985300U CN212985300U CN202021957193.7U CN202021957193U CN212985300U CN 212985300 U CN212985300 U CN 212985300U CN 202021957193 U CN202021957193 U CN 202021957193U CN 212985300 U CN212985300 U CN 212985300U
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Abstract
A530 mm penult-stage moving blade used on a full-rotating-speed ultra-supercritical steam turbine relates to a penult-stage moving blade used on the full-rotating-speed ultra-supercritical steam turbine. The utility model discloses a solve present ultra supercritical unit and also can participate in the peak shaver, this tertiary blade operating mode complicacy at the end of the low pressure jar that has caused the unit, the higher technical problem of load ratio. The utility model discloses a new optimal design's leaf profile, the wing section shroud is adopted at the leaf profile top simultaneously and is connected, makes the blade when guaranteeing efficiency, has improved the security of blade. The safety and high efficiency of the unit are ensured by the fine design of the shroud ring and the blade profile. The 530mm blade of the utility model is based on one-dimensional/quasi-three-dimensional/full three-dimensional pneumatic and thermodynamic analysis and calculation, adopts the full three-dimensional design of bending and twisting combined forming, the movable blade is twisted along the blade height to form a twisted blade, the top of the blade adopts a self-contained shroud ring, the air leakage is reduced, and the unit efficiency is improved; convenient assembly and safe and reliable operation.
Description
Technical Field
The utility model relates to a penultimate moving blade for on full rotational speed ultra supercritical steam turbine.
Background
The ultra-supercritical steam turbine set is an advanced steam turbine set in the world at present, has high steam inlet parameters, high efficiency and relatively reduced pollutant discharge amount, and is one of the key points for the construction of thermal power generator sets in a period in future in China. The existing ultra-supercritical unit also participates in peak shaving, so that the operation condition of the last three-stage blade of the low-pressure cylinder of the unit is complex, the load is higher, and the requirement on the safety of the blade is higher.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve present ultra supercritical unit and also can participate in the peak shaver, this has caused the last tertiary blade operating mode of low pressure jar of unit complicated, and the higher technical problem of load ratio provides a 530mm time last stage moving blade that is used for full rotational speed ultra supercritical steam turbine.
The utility model discloses a 530mm time last stage moving blade used on a full-speed ultra-supercritical steam turbine, which consists of a blade working part 1, a blade root 2 and a shroud 3; the shroud band 3, the blade working part 1 and the blade root 2 are of an integral structure from top to bottom, the molded line of the blade working part 1 is a variable cross-section twisted blade, namely, relative twisting exists between two adjacent cross sections, the cross-sectional area of the blade working part 1 from the root to the top is gradually reduced, the height L of the blade working part 1 is 530mm, the axial width V of the root of the blade working part 1 is 164.51mm, the diameter of the root of the blade working part 1 is 2078mm, and the steam exhaust area of the blade working part 1 is 1.516m2(ii) a The blade root 2 is a fir tree blade root, and the axial width W of the blade root 2 is 180 mm; the thickness H of the shroud 3 is 8.5mm and the working face axial distance B1 of the shroud 3 is 69.8 mm.
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 utility model aims at optimizing and upgrading the low-pressure penultimate stage 530mm blade of the original ultra-supercritical 600MW turboset. The utility model discloses a new optimal design's leaf profile, the wing section shroud is adopted at the leaf profile top simultaneously and is connected, makes the blade when guaranteeing efficiency, has improved the security of blade. The safety and high efficiency of the unit are ensured by the fine design of the shroud ring and the blade profile.
The utility model has the advantages that:
1. the 530mm blade of the utility model is based on one-dimensional/quasi-three-dimensional/full three-dimensional pneumatic and thermodynamic analysis and calculation, adopts the full three-dimensional design of bending and twisting combined forming, the movable blade is twisted along the blade height to form a twisted blade, the top of the blade adopts a self-contained shroud ring, the air leakage is reduced, and the unit efficiency is improved; convenient assembly and safe and reliable operation. The utility model is applied to the full-speed thermal power steam turbine unit with 600MW and 1000MW grades, which can meet the requirements of different areas and different users on the ultra-supercritical unit, thereby greatly enhancing the market competitiveness;
2. the utility model adopts comprehensive optimization of fluid power and structural strength, solves the optimization problem of pneumatic/structural integrated design, and optimizes the flow efficiency and the strength vibration characteristic of the 530mm blade;
3. the utility model discloses a steam turbine penult level impeller goes up the round has 68 moving blades, at the economic nature, all reached advanced level in the aspect of the fail safe nature of intensity vibration characteristic, static strength and assurance unit.
Drawings
FIG. 1 is a schematic view showing the overall structure of a 530mm last stage moving blade on a full speed ultra-supercritical steam turbine according to a first embodiment;
FIG. 2 is a top view of the shroud 3 of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the working portion 1 of the blade of FIG. 1;
FIG. 4 is an enlarged partial view of area A of FIG. 3;
fig. 5 is a partially enlarged view of the area C in fig. 3.
Detailed Description
The first embodiment is as follows: the embodiment is a 530mm penultimate moving blade used on a full-speed ultra-supercritical steam turbineAs shown in fig. 1 to 5, it is specifically composed of a blade working part 1, a blade root 2 and a shroud 3; the shroud band 3, the blade working part 1 and the blade root 2 are of an integral structure from top to bottom, the molded line of the blade working part 1 is a variable cross-section twisted blade, namely, relative twisting exists between two adjacent cross sections, the cross-sectional area of the blade working part 1 from the root to the top is gradually reduced, the height L of the blade working part 1 is 530mm, the axial width V of the root of the blade working part 1 is 164.51mm, the diameter of the root of the blade working part 1 is 2078mm, and the steam exhaust area of the blade working part 1 is 1.516m2(ii) a The blade root 2 is a fir tree blade root, and the axial width W of the blade root 2 is 180 mm; the thickness H of the shroud 3 is 8.5mm and the working face axial distance B1 of the shroud 3 is 69.8 mm.
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 purpose of the embodiment is to optimize and upgrade the low-pressure penultimate 530mm blade of the original ultra-supercritical 600MW turboset. This embodiment adopts new optimal design's blade profile, and the blade profile top adopts the airfoil shroud to connect simultaneously, makes the blade when guaranteeing efficiency, has improved the security of blade. The safety and high efficiency of the unit are ensured by the fine design of the shroud ring and the blade profile.
The beneficial effects of the embodiment are as follows:
1. the 530mm blade of the embodiment is based on one-dimensional/quasi-three-dimensional/full-three-dimensional pneumatic and thermodynamic analysis and calculation, a bending-twisting combined forming full-three-dimensional design is adopted, the movable blade is twisted along the blade height to form a twisted blade, and the top of the blade is provided with a shroud band, so that air leakage is reduced, and the unit efficiency is improved; convenient assembly and safe and reliable operation.
The embodiment is applied to the full-speed thermal power steam turbine unit with the grades of 600MW and 1000MW, can meet the requirements of different areas and different users on the ultra-supercritical unit, and greatly enhances the market competitiveness;
2. the embodiment adopts comprehensive optimization of fluid power and structural strength, solves the optimization problem of pneumatic/structural integrated design, and optimizes the flow efficiency and the strength vibration characteristic of the 530mm blade;
3. the last stage impeller of the steam turbine of the embodiment is provided with 68 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.
The second embodiment is as follows: the first difference between the present embodiment and the specific embodiment is: 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 164.51 mm-65.81 mm, the variation range of the chord length b is 178.57 mm-183.92 mm, the variation range of the installation angle beta y is 67.31-20.73 degrees, the variation range of the maximum thickness T of the molded line is 29.29 mm-9.45 mm, the variation range of the inlet angle alpha is 46.49-154.17 degrees, and the variation range of the outlet angle theta is 20.44-19.49 degrees. 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 rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: the axial width V of the blade working part 1 corresponding to the positions of the blade working part 1 with the heights of 0mm, 159mm, 265mm, 371mm and 530mm along the direction of the height L from the root to the top is 164.51mm, 154.74mm, 137.63mm, 112.63mm and 65.81mm in sequence, the corresponding chord length b is 1178.57mm, 183.64mm, 184.25mm, 186.53mm and 183.92mm in sequence, and the corresponding installation angle beta isyThe molded lines are 67.31 degrees, 57.53 degrees, 48.37 degrees, 37.09 degrees and 20.73 degrees in sequence, the maximum thickness T of the corresponding molded lines is 29.29mm, 20.61mm, 16.74mm, 13.61mm and 9.45mm in sequence, the corresponding inlet angles alpha are 46.49 degrees, 54.17 degrees, 72.97 degrees, 107.59 degrees and 154.17 degrees in sequence, and the corresponding outlet angles theta are 20.44 degrees, 20.62 degrees, 20.17 degrees, 19.24 degrees and 19.49 degrees in sequence. 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 others are 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 total height K of the blade root 2 is 99 mm. The structure ensures that the blade can be firmly installed in the wheel rim, and the assembly is stable, safe and reliable. The rest is the same as one of the first to third embodiments.
The fifth concrete implementation mode: the fourth difference between this embodiment and the specific embodiment is that: the cross-sectional areas of the blade working parts 1 corresponding to the positions with the heights of 0mm, 159mm, 265mm, 371mm and 530mm of the blade working parts 1 from the root part to the top part along the direction of the height L are 36.46cm in sequence2、28cm2、21.79cm2、16.63cm2And 8.86cm2. The rest is the same as the fourth embodiment.
It is right to use the following experiment the utility model discloses verify:
test one: the test is a 530mm time final stage moving blade used on a full-rotating-speed ultra-supercritical steam turbine, as shown in fig. 1-5, and specifically comprises a blade working part 1, a blade root 2 and a shroud 3; the shroud band 3, the blade working part 1 and the blade root 2 are of an integral structure from top to bottom, the molded line of the blade working part 1 is a variable cross-section twisted blade, namely, relative twisting exists between two adjacent cross sections, the cross-sectional area of the blade working part 1 from the root to the top is gradually reduced, the height L of the blade working part 1 is 530mm, the axial width V of the root of the blade working part 1 is 164.51mm, the diameter of the root of the blade working part 1 is 2078mm, and the steam exhaust area of the blade working part 1 is 1.516m2(ii) a The blade root 2 is a fir tree blade root, and the axial width W of the blade root 2 is 180 mm; the thickness H of the shroud ring 3 is 8.5mm, and the axial distance B1 of the working surface of the shroud ring 3 is 69.8 mm;
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 164.51 mm-65.81 mm, the variation range of the chord length b is 178.57 mm-183.92 mm, the variation range of the installation angle beta y is 67.31-20.73 degrees, the variation range of the maximum thickness T of the molded line is 29.29 mm-9.45 mm, the variation range of the inlet angle alpha is 46.49-154.17 degrees, and the variation range of the outlet angle theta is 20.44-19.49 degrees. 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 axial width V of the blade working part 1 corresponding to the positions of the blade working part 1 with the heights of 0mm, 159mm, 265mm, 371mm and 530mm along the direction of the height L from the root to the top is 164.51mm, 154.74mm, 137.63mm, 112.63mm and 65.81mm in sequence, the corresponding chord length b is 1178.57mm, 183.64mm, 184.25mm, 186.53mm and 183.92mm in sequence, and the corresponding installation angle beta isyThe molded lines are 67.31 degrees, 57.53 degrees, 48.37 degrees, 37.09 degrees and 20.73 degrees in sequence, the maximum thickness T of the corresponding molded lines is 29.29mm, 20.61mm, 16.74mm, 13.61mm and 9.45mm in sequence, the corresponding inlet angles alpha are 46.49 degrees, 54.17 degrees, 72.97 degrees, 107.59 degrees and 154.17 degrees in sequence, and the corresponding outlet angles theta are 20.44 degrees, 20.62 degrees, 20.17 degrees, 19.24 degrees and 19.49 degrees in sequence. 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 total height K of the blade root 2 is 99 mm. The structure ensures that the blades can be firmly arranged in the wheel rim, and the assembly is stable, safe and reliable;
the cross-sectional areas of the blade working parts 1 corresponding to the positions with the heights of 0mm, 159mm, 265mm, 371mm and 530mm of the blade working parts 1 from the root part to the top part along the direction of the height L are 36.46cm in sequence2、28cm2、21.79cm2、16.63cm2And 8.86cm2。
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 purpose of the test is to optimize and upgrade the low-pressure penultimate 530mm blade of the original ultra-supercritical 600MW turboset. This embodiment adopts new optimal design's blade profile, and the blade profile top adopts the airfoil shroud to connect simultaneously, makes the blade when guaranteeing efficiency, has improved the security of blade. The safety and high efficiency of the unit are ensured by the fine design of the shroud ring and the blade profile.
The beneficial effect of this experiment:
1. the 530mm blade of the test is based on one-dimensional/quasi-three-dimensional/full-three-dimensional pneumatic and thermodynamic analysis and calculation, a bending-twisting combined forming full-three-dimensional design is adopted, the movable blade is twisted along the blade height to form a twisted blade, and the top of the blade is provided with a shroud band, so that air leakage is reduced, and the unit efficiency is improved; convenient assembly and safe and reliable operation.
The test is applied to the full-speed thermal power steam turbine unit with the grades of 600MW and 1000MW, the requirements of different areas and different users on the ultra-supercritical unit can be met, and the market competitiveness is greatly enhanced;
2. the test adopts comprehensive optimization of fluid power and structural strength, solves the optimization problem of pneumatic/structural integrated design, and optimizes the flow efficiency and the strength vibration characteristic of the 530mm blade;
3. the steam turbine penult-stage impeller of the test is provided with 68 moving blades in a circle, and the economic efficiency, the strength vibration characteristic, the static strength and the safety and the reliability of a unit are all advanced.
Claims (5)
1. A530 mm time last stage moving blade used for ultra supercritical steam turbine of the full speed, characterized by that 530mm time last stage moving blade used for ultra supercritical steam turbine of the full speed is made up of working part of the blade (1), blade root (2) and shroud (3); shroud ring (3), blade working portion (1) and blade root (2) from top to bottom structure as an organic whole, the molded lines of blade working portion (1) are the variable cross section and turn round the blade, there is relative torsion between two adjacent sections promptly, blade working portion (1) reduces from the sectional area at root to top gradually, the height L of blade working portion (1) is 530mm, the root axial width V of blade working portion (1) is 164.51mm, the root diameter of blade working portion (1) is 2078mm, the exhaust area 1.516m of blade working portion (1) is2(ii) a The blade root (2) is a fir tree blade root, and the axial width W of the blade root (2) is 180 mm; the thickness H of the shroud band (3) is 8.5mm, and the axial distance B1 of the working surface of the shroud band (3) is 69.8 mm.
2. The 530mm penultimate moving blade for the full speed ultra supercritical steam turbine according to claim 1, wherein the range of variation from the root axial width V of the blade working portion (1) to the tip axial width V1 of the blade working portion (1) is 164.51mm to 65.81mm, the range of variation of the chord length b is 178.57mm to 183.92mm, the range of variation of the setting angle β y is 67.31 to 20.73 °, the range of variation of the maximum molded line thickness T is 29.29mm to 9.45mm, the range of variation of the inlet angle α is 46.49 ° to 154.17 °, and the range of variation of the outlet angle θ is 20.44 ° to 19.49 °.
3. The 530mm penultimate moving blade for use in a full speed ultra supercritical steam turbine according to claim 1, wherein the axial width V of the working portion (1) is 164.51mm, 154.74mm, 137.63mm, 112.63mm and 65.81mm in order from the root to the tip along the height L of the working portion (1) at the positions where the heights are 0mm, 159mm, 265mm, 371mm and 530mm, respectively, and the chord length b is 1178.57mm, 183.64mm, 184.25mm, 186.53mm and 183.92mm in order, and the setting angle β is set to correspond toyThe molded lines are 67.31 degrees, 57.53 degrees, 48.37 degrees, 37.09 degrees and 20.73 degrees in sequence, the maximum thickness T of the corresponding molded lines is 29.29mm, 20.61mm, 16.74mm, 13.61mm and 9.45mm in sequence, the corresponding inlet angles alpha are 46.49 degrees, 54.17 degrees, 72.97 degrees, 107.59 degrees and 154.17 degrees in sequence, and the corresponding outlet angles theta are 20.44 degrees, 20.62 degrees, 20.17 degrees, 19.24 degrees and 19.49 degrees in sequence.
4. A 530mm penultimate moving blade for a full speed ultra supercritical steam turbine according to claim 1 wherein the total height K of the blade root (2) is 99 mm.
5. The 530mm penultimate moving blade for a full speed ultra supercritical steam turbine according to claim 1, wherein the sectional areas of the blade working parts (1) corresponding to the heights of 0mm, 159mm, 265mm, 371mm and 530mm from the root to the tip in the direction of the height L are 36.46cm in order of the blade working parts (1)2、28cm2、21.79cm2、16.63cm2And 8.86cm2。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021957193.7U CN212985300U (en) | 2020-09-09 | 2020-09-09 | 530 mm-time final-stage moving blade for full-speed ultra-supercritical steam turbine |
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| CN202021957193.7U CN212985300U (en) | 2020-09-09 | 2020-09-09 | 530 mm-time final-stage moving blade for full-speed ultra-supercritical steam turbine |
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| CN212985300U true CN212985300U (en) | 2021-04-16 |
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| CN202021957193.7U Active CN212985300U (en) | 2020-09-09 | 2020-09-09 | 530 mm-time final-stage moving blade for full-speed ultra-supercritical steam turbine |
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