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2000mm last-stage moving blade for half-speed nuclear turbine

A steam turbine, half-speed technology, used in machines/engines, blade support elements, mechanical equipment, etc., can solve the problem that the last stage blades cannot meet the needs of high-power units

Pending Publication Date: 2020-10-27
HARBIN TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing final-stage blades cannot meet the needs of high-power units, the present invention proposes a 2000mm final-stage moving blade for half-speed nuclear power steam turbines

Method used

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  • 2000mm last-stage moving blade for half-speed nuclear turbine
  • 2000mm last-stage moving blade for half-speed nuclear turbine
  • 2000mm last-stage moving blade for half-speed nuclear turbine

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specific Embodiment approach 1

[0012] Specific implementation mode one: combine Figure 1 ~ Figure 4 Describe this embodiment, this embodiment is made up of blade working part 1, blade root 2, shroud 3 and boss tie bar 4, and shroud 3, blade work part 1, blade root 2 and boss tie bar 4 are from top to bottom The lower die is forged into one, and the profile of the working part 1 of the blade is a variable cross-section twisted blade, that is, there is a relative twist between two adjacent sections, and the cross-sectional area of ​​the working part 1 of the blade decreases gradually from the root to the top; the height of the working part 1 of the blade is L is 2000mm, the axial width V of the root of the blade working part 1 is 413.65mm, the root diameter of the blade working part 1 is Φ2750mm, and the exhaust area of ​​the blade working part 1 is 13.61m 2 , the thickness H of the shroud 3 is 40mm, and the axial distance B1 of the working surface of the shroud 3 is 98.58mm. When assembling the entire blad...

specific Embodiment approach 2

[0013] Specific implementation mode two: combination figure 1 , Figure 4 , Figure 5 and Figure 6 To illustrate this embodiment, the variation range from the root axial width V of the blade working part 1 to the top axial width V1 of the blade working part 1 is 413.65 mm to 95.36 mm, and the variation range of the chord length b is 417.98 mm to 417.98 mm. 343.55mm, the variation range of the installation angle βy is 82.3°~15.84°, the variation range of the maximum thickness T of the molding line is 46.39mm~12.74mm, the variation range of the inlet angle α is 56.72°~161.1°, the variation range of the outlet angle θ It is 38.32°~24.9°. By adopting the above structural parameters, the blades can be easily assembled while ensuring that the outer structure dimensions of the blades meet the design requirements. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0014] Specific implementation mode three: combination figure 1 , Figure 4 , Figure 5 and Figure 6 To illustrate this embodiment, the height L of the blade working part 1 of this embodiment is 0 mm, 400 mm, 800 mm, 1300 mm, 1800 mm, and 2000 mm respectively, and the corresponding axial width V of the blade working part 1 is respectively: 413.65 mm, 328.61 mm , 259.48mm, 176.85mm, 107.58mm, 95.36mm, the corresponding chord length b is respectively: 417.98mm, 338.55mm, 304.56mm, 315.8mm, 336.95mm, 343.55mm, and the corresponding installation angle β y They are respectively: 82.3°, 76.49°, 58.56°, 33.91°, 18.33°, 15.84°, and the corresponding maximum thickness T of the molding line are: 46.39mm, 51.75mm, 44.48mm, 24.97mm, 16.33mm, 12.74 mm, the corresponding inlet angle α is respectively: 56.72°, 46.15°, 66.75°, 123.53°, 153.52°, 161.1°, and the corresponding outlet angle θ is respectively: 38.32°, 37.69°, 33.2°, 27.16 °, 24.49°, 24.9°. By adopting the above structural pa...

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Abstract

The invention relates to a 2000mm last-stage moving blade for a half-speed nuclear turbine, and the 2000mm last-stage moving blade for the half-speed nuclear turbine aims to solve the problem that a last-stage blade in the prior art cannot meet the requirements of a high-power unit. The molded line of a blade working part is a variable cross-section twisted blade, the height L of the blade workingpart is 2000mm, the axial width V of the root of the blade working part is 413.65mm, the diameter of the root of the blade working part is 13.61m2 of an exhaust area of the blade working part, the thickness H of a shroud ring is 40mm, and the axial distance B1 of the working surface of the shroud ring is 98.58mm. The 2000mm last-stage moving blade for the half-speed nuclear turbine adopts a fullthree-dimensional design of bending and twisting combined molding, the moving blade is twisted along the height of the blade to form a twisted long blade stage, and the top of the blade adopts the self-provided shroud ring, thereby reducing the loss and the air leakage, improving the efficiency of the unit and ensuring the safe and reliable operation. The 2000mm last-stage moving blade for the half-speed nuclear turbine is suitable for preparing the last-stage moving blade for the half-speed nuclear turbine.

Description

technical field [0001] The invention relates to a 2000mm last-stage moving blade for a half-speed nuclear power steam turbine. Background technique [0002] Nuclear power steam turbines have the advantage of not emitting greenhouse gases that pollute the atmosphere, and at the same time, the price of electricity production is relatively cheap, so steam turbine manufacturers around the world are developing high-power nuclear power steam turbines. Since the power generated by the last-stage blades accounts for more than 10% of the whole machine, the last-stage long blades play an important role in the development of high-power steam turbines and the improvement of unit economy. Designing a reliable and efficient last-stage long blade is the basis for developing a high-power unit. When the power of the unit is greater, the annual average load rate is higher, and the back pressure is lower, correspondingly, the exhaust area of ​​the final blade is required to be larger, the bla...

Claims

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Application Information

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IPC IPC(8): F01D5/14F01D5/16F01D5/30
CPCF01D5/141F01D5/147F01D5/16F01D5/30
Inventor 刘云锋郭魁俊管继伟李宇峰马义良关淳王丽华梁天赋李央武芏茳潘春雨余海鹏刘瑶张迪赵洪羽马天吟王健
Owner HARBIN TURBINE
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