CN212272314U - 2000mm last-stage moving blade for half-speed nuclear turbine - Google Patents
2000mm last-stage moving blade for half-speed nuclear turbine Download PDFInfo
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- CN212272314U CN212272314U CN202021743671.4U CN202021743671U CN212272314U CN 212272314 U CN212272314 U CN 212272314U CN 202021743671 U CN202021743671 U CN 202021743671U CN 212272314 U CN212272314 U CN 212272314U
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Abstract
A2000 mm last stage moving blade for half rotational speed nuclear power steam turbine relates to a last stage moving blade for half rotational speed nuclear power steam turbine. The problem that the requirement of high-power unit can not be satisfied to current last stage blade is solved in the purpose. The profile of the working part of the blade is a twisted blade with variable cross section, the height L of the working part of the blade is 2000mm, the axial width V of the root of the working part of the blade is 413.65mm, and the diameter of the root of the working part of the blade is 413.65mm
The steam discharge area of the working part of the blade is 13.61m2The shroud has a thickness H of 40mm and a shroud face axial distance B1 of 98.58 mm. The utility model discloses a full three-dimensional design of turn round joint forming, movable vane along the high distortion of leaf form the long blade level of distortion, the blade top adopts from taking the shroud ring, reduces loss and gas leakage, improves unit efficiency, operation safe and reliable. The utility model is suitable for a preparation half rotational speed nuclear turbine last stage moving blade.
Description
Technical Field
The utility model relates to a 2000mm last stage moving blade for half rotational speed nuclear power steam turbine.
Background
The nuclear turbine has the advantages of no emission of greenhouse gases polluting the atmosphere, and low electricity production price, so that various turbine manufacturers in the world develop high-power nuclear turbine units. Because the power generated by the last-stage blade accounts for more than 10% of the whole machine, the last-stage blade has important effects on developing a high-power steam turbine and improving the economy of a unit. A final-stage long blade which is reliable in operation and high in efficiency is designed, and the design method is a basis for developing a high-power unit. When the unit power is larger, the annual average load rate is higher, and the back pressure is lower, the steam exhaust area of the last stage blade is required to be larger correspondingly, the blades are higher, and the residual speed loss is smaller. With the increasing demand for nuclear power turbosets with larger capacity, the development of nuclear power half-speed last-stage long blades with larger steam exhaust area and longer length becomes a necessary development trend. In order to develop a nuclear power steam turbine set with capacity of 1700MW and above, a 2000mm last-stage length blade is developed and designed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that current last stage blade can't satisfy the demand of high-power unit, provide a 2000mm last stage moving blade for half rotational speed nuclear power steam turbine.
The utility model discloses a 2000mm last stage moving blade for half rotational speed nuclear power steam turbine is by blade working part, the blade root, shroud and boss lacing wire are constituteed, the shroud, the blade working part, blade root and boss lacing wire are from top to bottom swaged integratively, blade is turned round for the variable cross section to blade working part's molded lines, there is relative torsion promptly between two adjacent cross sections, blade working part reduces from the cross sectional area at root to top gradually, blade working part's high L is 2000mm, blade working part's root axial width V is 413.65mm, blade working part's root diameter is for
The steam discharge area of the working part of the blade is 13.61m2The shroud has a thickness H of 40mm and a shroud face axial distance B1 of 98.58 mm.
The utility model discloses principle and beneficial effect do:
1. the utility model discloses 2000mm long blade is based on one-dimensional/accurate three-dimensional/full three-dimensional pneumatics, thermal analysis calculation, has adopted the full three-dimensional design of turn-round joint forming, and the movable vane twists along the leaf height and forms the long blade level of distortion, and the blade top adopts from taking the shroud ring, reduces the loss, reduces gas leakage, improves unit efficiency; convenient assembly and safe and reliable operation. The utility model discloses use on the half rotational speed nuclear power steam turbine unit of 1000MW and above grade, can satisfy large capacity nuclear power steam turbine unit's demand, strengthened market competition greatly.
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 flow efficiency and the intensity vibration characteristic of 2000mm blade all reach the optimum.
3. The last-stage impeller of the steam turbine is provided with 70 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.
4. The utility model discloses 2000mm moving blade adopts the boss lacing wire, connects from the shroud damping shroud, and blade joint strength is guaranteed to skewed tooth fir type blade root, and is more meticulous in the design of shroud, blade root and lacing wire, guarantees the safety of unit high-efficient.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention, fig. 2 is a top view of a shroud band 3, fig. 3 is a top view of a boss lacing wire 4, fig. 4 is a schematic view of a typical cross section of a blade working portion 1, fig. 5 is a partial enlarged view of ii of fig. 4, and fig. 6 is a partial enlarged view of i of fig. 4.
Detailed Description
The technical scheme of the utility model is not limited to the specific implementation modes listed below, and also comprises any reasonable combination between the specific implementation modes.
The first embodiment is as follows: the present embodiment is described with reference to fig. 1 to 4, and the present embodiment comprises a blade working portion 1, a blade root 2, and a shroudThe shroud ring 3, the blade working part 1, the blade root 2 and the boss lacing wire 4 are 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, namely, relative torsion exists between two adjacent cross sections, and the cross section 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 2000mm, the axial width V of the root part of the blade working part 1 is 413.65mm, the diameter of the root part of the blade working part 1 is phi 2750mm, and the steam exhaust area of the blade working part 1 is 13.61m2The thickness H of the shroud 3 is 40mm, and the axial distance B1 between the working faces of the shroud 3 is 98.58 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 second embodiment is as follows: the present embodiment will be described with reference to fig. 1, 4, 5, and 6, in which the range of variation from the root axial width V of the blade operating portion 1 to the tip axial width V1 of the blade operating portion 1 is 413.65mm to 95.36mm, the range of variation from the chord length b is 417.98mm to 343.55mm, the range of variation from the setting angle β y is 82.3 to 15.84 °, the range of variation from the maximum thickness T of the molded line is 46.39mm to 12.74mm, the range of variation from the entrance angle α is 56.72 to 161.1 °, and the range of variation from the exit angle θ is 38.32 to 24.9 °. 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. Other components and connections are the same as those in the first embodiment.
The third concrete implementation mode: the present embodiment will be described with reference to fig. 1, 4, 5, and 6, and the axial widths V of the vane working part 1 corresponding to the positions where the height L of the vane working part 1 of the present embodiment is 0mm, 400mm, 800mm, 1300mm, 1800mm, and 2000mm are respectively: 413.65mm, 328.61mm, 259.48mm, 176.85mm, 107.58mm and 95.36mm, and the corresponding chord lengths b are respectively as follows: 417.98mm, 338.55mm, 304.56mm, 315.8mm, 336.95mm and 343.55mm, and corresponding installation angle betaySequentially and respectively: 82.3 degrees and 76 degrees.The maximum thickness T of the corresponding molded lines is respectively 49 degrees, 58.56 degrees, 33.91 degrees, 18.33 degrees and 15.84 degrees: 46.39mm, 51.75mm, 44.48mm, 24.97mm, 16.33mm and 12.74mm, and the corresponding inlet angles alpha are respectively as follows: 56.72 °, 46.15 °, 66.75 °, 123.53 °, 153.52 °, and 161.1 °, the corresponding exit angles θ are respectively: 38.32 °, 37.69 °, 33.2 °, 27.16 °, 24.49 °, 24.9 °. 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. Other components and connections are the same as those in the first embodiment.
The fourth concrete implementation mode: the embodiment will be described with reference to fig. 1, the blade root 2 of which has a total height K of 173.32 mm. The structure ensures that the blade can be firmly installed in the wheel rim, and the assembly is stable, safe and reliable. Other components and connections are the same as those in the first embodiment.
The fifth concrete implementation mode: referring to fig. 1, the blade root 2 of the present embodiment is a skewed tooth fir-tree blade root, and the axial width W of the blade root 2 is 470 mm.
The section parameters are as follows:
Claims (5)
1. the utility model provides a 2000mm last stage moving blade for half rotational speed nuclear power steam turbine which characterized in that: a2000 mm last stage moving blade for half rotational speed nuclear power steam turbine comprises blade working part (1), blade root (2), shroud (3) and boss lacing wire (4), shroud (3), blade working part (1), blade root (2) and boss lacing wire (4) are swaged from top to bottom and become integrative, the molded lines of blade working part (1) are the variable cross section and turn round the blade, there is relative torsion between two adjacent sections promptly, blade working part (1) reduces from the sectional area at root to top gradually, the height L of blade working part (1) is 2000mm, the root axial width V of blade working part (1) is 413.65mm, the root diameter of blade working part (1) is for
The steam discharge area of the working part (1) of the blade is 13.61m2The thickness H of the shroud ring (3) is 40mm, and the axial distance B1 of the working surface of the shroud ring (3) is 98.58 mm.
2. The 2000mm last stage moving blade for a half speed nuclear power turbine according to claim 1, wherein: the variation range of 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 413.65 mm-95.36 mm, the variation range of the chord length b is 417.98 mm-343.55 mm, and the installation angle betayThe variation range of the angle is 82.3-15.84 degrees, the variation range of the maximum thickness T of the molded line is 46.39-12.74 mm, the variation range of the inlet angle alpha is 56.72-161.1 degrees, and the variation range of the outlet angle theta is 38.32-24.9 degrees.
3. The 2000mm last stage moving blade for a half speed nuclear power turbine according to claim 1, wherein: the axial widths V of the blade working parts (1) corresponding to the positions of the height L of the blade working parts (1) of 0mm, 400mm, 800mm, 1300mm, 1800mm and 2000mm are respectively as follows: 413.65mm, 328.61mm, 259.48mm, 176.85mm, 107.58mm and 95.36mm, and the corresponding chord lengths b are respectively as follows: 417.98mm, 338.55mm, 304.56mm, 315.8mm, 336.95mm and 343.55mm, and corresponding installation angle betaySequentially and respectively: 82.3 degrees, 76.49 degrees, 58.56 degrees, 33.91 degrees, 18.33 degrees and 15.84 degrees, and the maximum thickness T of the corresponding molded lines are respectively as follows: 46.39mm, 51.75mm, 44.48mm, 24.97mm, 16.33mm and 12.74mm, and the corresponding inlet angles alpha are respectively as follows: 56.72 °, 46.15 °, 66.75 °, 123.53 °, 153.52 °, and 161.1 °, the corresponding exit angles θ are respectively: 38.32 °, 37.69 °, 33.2 °, 27.16 °, 24.49 °, 24.9 °.
4. The 2000mm last stage moving blade for a half speed nuclear power turbine according to claim 1, wherein: the total height K of the blade root (2) is 173.32 mm.
5. The 2000mm last stage moving blade for a half speed nuclear power turbine according to claim 1, wherein: the blade root (2) is a helical tooth fir tree blade root, and the axial width W of the blade root (2) is 470 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021743671.4U CN212272314U (en) | 2020-08-19 | 2020-08-19 | 2000mm last-stage moving blade for half-speed nuclear turbine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021743671.4U CN212272314U (en) | 2020-08-19 | 2020-08-19 | 2000mm last-stage moving blade for half-speed nuclear turbine |
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| CN212272314U true CN212272314U (en) | 2021-01-01 |
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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 |
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2020
- 2020-08-19 CN CN202021743671.4U patent/CN212272314U/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 |
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