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 un

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

Examples

Experimental program
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Example Embodiment

[0012] Specific embodiment one: combination Figure 1 ~ Figure 4 To illustrate this embodiment, this embodiment is composed of the blade working part 1, the blade root 2, the shroud 3 and the boss brace 4, the shroud 3, the blade working part 1, the blade root 2 and the boss brace 4 are from top to The lower die is forged into one body. The shape of the blade working part 1 is a variable cross-section twisted blade, that is, there is relative torsion between two adjacent sections, and the cross-sectional area of ​​the blade working part 1 gradually decreases from the root to the top; the height of the blade working part 1 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 steam 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...

Example Embodiment

[0013] Specific implementation manner two: combination figure 1 , Figure 4 , Figure 5 with Image 6 To explain this embodiment, the variation range of the root axial width V of the blade working part 1 to the top axial width V1 of the blade working part 1 is 413.65mm~95.36mm, and the variation range of the chord length b is 417.98mm~ 343.55mm, the variation range of the installation angle βy is 82.3°~15.84°, the variation range of the maximum profile T 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°. Using the above-mentioned structural parameters, while ensuring that the shape and size of the blade meet the design requirements, the blade can be easily assembled. Other components and connection relationships are the same as those in the first embodiment.

Example Embodiment

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

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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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