Low-pressure steam inlet structure of steam turbine

A steam turbine, low-pressure technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve the problems of increased manufacturing difficulty and cost, elongated axial length, complex structural design, etc., to reduce the number of flange openings , The effect of reducing the axial length and the number of manholes

Active Publication Date: 2017-03-15
DONGFANG TURBINE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large number of manholes in this structure, and the manholes must ensure sufficient axial width, the axial length of the low-pressure cylinder near the first stage is particularly long
The ax

Method used

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  • Low-pressure steam inlet structure of steam turbine
  • Low-pressure steam inlet structure of steam turbine
  • Low-pressure steam inlet structure of steam turbine

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Embodiment Construction

[0019] Such as Figure 2 to Figure 6 As shown, a low pressure steam inlet structure for a steam turbine includes a steam inlet chamber 1; the steam inlet chamber 1 has a steam inlet 7; the steam inlet chamber 1 is surrounded by the upper and lower half of the low pressure steam inlet structure The steam inlet chamber 1 is provided with a first-stage extraction chamber 8 next to the first-stage partition board position 5. The first-stage extraction chamber 8 includes an upper half of the first-stage extraction chamber and a lower half of the first-stage extraction chamber; the upper half of the first-stage extraction chamber includes a small-diameter partition enclosure 10 and The small vertical flange 9, the small diameter partition wall 10 separates the small vertical flange 9 from the peripheral plate 11, and is enclosed by the peripheral plate 11, the small diameter partition wall 10 and the small vertical flange 9; The lower half of the first-stage extraction chamber inclu...

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PUM

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Abstract

The invention discloses a low-pressure steam inlet structure of a steam turbine. The low-pressure steam inlet structure comprises a steam inlet cavity defined by a low-pressure steam inlet upper half part and a low low-pressure steam inlet lower half part. The steam inlet cavity is provided with a steam inlet. The low-pressure steam inlet structure is characterized in that a first-level steam extraction cavity is formed in the part, close to a first-level partition plate arranging position, of the steam inlet cavity; the first-level steam extraction cavity comprises a first-level steam extraction cavity upper half part and a first-level steam extraction cavity lower half part; the first-level steam extraction cavity upper half part is defined by an outer surrounding plate, a small-diameter partition surrounding plate and a small vertical flange; the first-level steam extraction cavity lower half part is composed of two arc plates, a vertical flange connected with a low-pressure cylinder lower half part bottom barrel, the low-pressure cylinder lower half part bottom barrel and an outer surrounding plate; and a steam extraction pipe position is reserved at the low-pressure cylinder lower half part bottom barrel. Compared with an original structure, the number of flange crotches is reduced in the structure, the number of split bolts, the number of manholes is reduced, and the structure is simple and compact.

Description

Technical field [0001] The invention relates to a low-pressure cylinder of a steam turbine, in particular to a low-pressure steam inlet structure of a steam turbine. Background technique [0002] For the double-split low-pressure cylinder with symmetrical extraction after the first stage of low pressure, in order to separate the extraction chamber, usually a vertical opening gear is set before and after the first stage, and bolts are arranged in the horizontal middle. Such as figure 1 As shown, the first-stage extraction chamber 8 is provided on both sides of the inlet steam chamber 1. The first-stage extraction chamber 8 has the first-stage extraction chamber front opening 2 and the first-stage extraction chamber rear Open gear 3; for the assembly and disassembly of the split bolt 4, manholes 6 should be provided in the extraction chambers on both sides. Due to the large number of manholes in this structure, and the manhole must ensure sufficient axial width, the axial length o...

Claims

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Application Information

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IPC IPC(8): F01D9/06F01D25/30
CPCF01D9/06F01D25/30
Inventor 靳浩段增辉欧楚雄高宏喜陶功新徐滨唐蓉陈娇红邱健谭俊陈海峰
Owner DONGFANG TURBINE CO LTD
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