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645 mm last stage dynamic blade for industrial steam turbine

A technology for industrial steam turbines and moving blades, which is applied in the direction of machines/engines, blade support components, mechanical equipment, etc., can solve the problems of small exhaust area of ​​final stage blades, large rotor size, high cost, etc., to achieve reduced vibration stress, good The effect of aerodynamic performance and convenient blade assembly

Active Publication Date: 2019-09-17
HANGZHOU STEAM TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country's power grid is 50Hz, the corresponding steam turbine speed is 3000r / min, and there are few products with 3600r / min last-stage long blades. There are the following problems: the applied 3600r / min final-stage blades have small exhaust area, low efficiency, large rotor size, high cost

Method used

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  • 645 mm last stage dynamic blade for industrial steam turbine
  • 645 mm last stage dynamic blade for industrial steam turbine
  • 645 mm last stage dynamic blade for industrial steam turbine

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Embodiment 1

[0019] Such as figure 1 , 2 As shown in , 3, the 645mm final stage moving blade for the industrial steam turbine described in this embodiment is a twisted blade with variable cross-section, including blade body 1, blade root 3 and convex blades for forming a full circle of self-locking blades. Tailajin 2, the height of the blade body 1 is 645mm; the blade root 3 is a fir tree-shaped oblique blade root, the axial width of the blade root 3 is 200mm, and the blade is installed in the impeller groove through the fir tree-shaped blade root 3, Axially assembled; the boss is an elliptical boss, and the center of the boss is set at a height of 0.65 from the bottom to the top of the blade body; the blade body 1 has a hardened part at the back arc of the steam inlet side, and the hardened part is hardened. Length as needed.

[0020] The relative blade height Ld of the blade body 1 increases monotonously from 0% to 100%, and the pitch-to-chord length ratio T / b from the blade root secti...

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Abstract

The invention relates to the field of industrial steam turbine blades, and particularly discloses a 645 mm last stage dynamic blade for an industrial steam turbine. The 645 mm last stage dynamic blade for the industrial steam turbine comprises a blade body, a blade root and a boss lashing wire for making the blade form whole circle self locking, wherein the blade body and the blade root are integrally formed; a molded line of the blade body is a variable section twisted blade; the height H of the blade body is equal to 645 mm, the bottom radius Dr is equal to 560 mm, and the exhausting area of the blade body is 3.6 m<2>; and the center of the self-locking boss lashing wire is arranged at the position, with the relative blade height being 0.65 from bottom to top, of the blade body. The large load last stage dynamic blade, with the exhausting area being 3.6 m<2>, for the industrial steam turbine has the beneficial effects that the pneumatic efficiency is high, the strength performance is good, the exhausting area is large, and manufacturing and assembling are convenient, and can widely used for waste heat utilizing and industrial steam turbines for the PTA manufacturing process.

Description

technical field [0001] The invention relates to the field of industrial steam turbines, in particular to a 645mm final stage moving blade for the industrial steam turbines. Background technique [0002] In the PTA industrial process, a large amount of low-quality steam with a temperature of less than 150°C will be produced. Using this low-quality steam to drive industrial steam turbines for power generation is a good way to achieve energy saving, emission reduction, and economic benefits. my country's power grid is 50Hz, the corresponding steam turbine speed is 3000r / min, and there are few products with 3600r / min final-stage long blades. There are the following problems: the applied 3600r / min final-stage blades have small exhaust area, low efficiency, large rotor size, high cost. Contents of the invention [0003] The object of the present invention is to solve the deficiency of the above-mentioned technology and design a kind of fixed-speed heavy-duty industrial steam tur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/14F01D5/30
CPCF01D5/141F01D5/147F01D5/30F05D2240/301
Inventor 隋永枫初鹏余沛坰朱子奇任晟刘象拯蓝吉兵吴宏超刘盼年袁浩
Owner HANGZHOU STEAM TURBINE
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