A 645mm final stage moving blade for an industrial steam turbine

A technology for industrial steam turbines and moving blades, which is applied to machines/engines, blade supporting elements, and mechanical equipment, etc., can solve the problems of small exhaust area of ​​the last stage blade, large rotor size, low efficiency, etc., to reduce vibration stress, Good aerodynamic performance and increased damping effect

Active Publication Date: 2022-02-22
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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  • A 645mm final stage moving blade for an industrial steam turbine
  • A 645mm final stage moving blade for an industrial steam turbine
  • A 645mm final stage moving blade for an industrial steam turbine

Examples

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Embodiment 1

[0019] like 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 section ...

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Abstract

The invention relates to the field of industrial steam turbine blades, and in particular discloses a 645mm last-stage moving blade for industrial steam turbines, which includes an integrally formed blade body, a blade root, and a boss pull for making the blade form a complete circle of self-locking. The shape line of the blade is twisted blade with variable cross-section, the height of the blade body is H=645mm, the radius of the bottom is Dr=560mm, and the exhaust area of ​​the blade body is 3.6m 2 , the center of the self-locking boss is set at a height of 0.65 from the bottom to the top of the blade body, and the exhaust area is 3.6m 2 The large-load final-stage moving blades for industrial steam turbines have the advantages of high aerodynamic efficiency, good strength performance, large steam exhaust area, and convenient manufacturing and assembly. They can be widely used in industrial steam turbines for waste heat utilization and PTA manufacturing processes.

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 Patents(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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