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Temperature balance structure of cylindrical cylinder of steam turbine

A technology of temperature balance and steam turbine, which is applied in the direction of mechanical equipment, engine components, machines/engines, etc., can solve the problems of external cylinder thermal stress fluctuation, external cylinder fatigue, unfavorable long-term stable operation of the unit, etc., and achieve thermal stress stability and shrinkage Difference in thermal deformation and the effect of reducing the amount of steam leakage

Active Publication Date: 2022-05-13
DONGFANG TURBINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the pulsation of the exhaust steam parameters during the operation of the unit due to the operating conditions and the turbulence of the steam flow, the fluctuation of the return steam temperature causes the oscillation of the temperature field of the outer cylinder, which makes the thermal stress of the outer cylinder fluctuate and causes the fatigue of the outer cylinder, which is not conducive to the long-term operation of the unit. stable operation

Method used

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  • Temperature balance structure of cylindrical cylinder of steam turbine
  • Temperature balance structure of cylindrical cylinder of steam turbine
  • Temperature balance structure of cylindrical cylinder of steam turbine

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Such as figure 1 As shown, the temperature balance structure of a cylindrical cylinder of a steam turbine in this embodiment is used for a high-pressure cylinder, including an outer cylinder 1, an inner cylinder 2, a steam inlet pipe 3 and an exhaust pipe;

[0042] The outer cylinder 1 includes an upper half outer cylinder 11 and a lower half outer cylinder 12, and the inner cylinder 2 includes an upper half inner cylinder 21 and a lower half inner cylinder 22;

[0043] The inner cylinder 2 is arranged in the outer cylinder 1 in a cylindrical shape, and there is an interlayer between the inner cylinder 2 and the outer cylinder 1. The inner cylinder 2 is provided with a steam inlet chamber, and the inner cylinder 2 is provided with a heat shield 7;

[0044] The steam inlet pipe 3 passes through the lower half of the outer cylinder 12 and communicates with the steam inlet chamber, and the exhaust pipe communicates with the lower half of the outer cylinder 12;

[0045] Th...

Embodiment 2

[0048] Such as figure 2 As shown, the temperature balance structure of a cylindrical cylinder of a steam turbine in this embodiment is used for a high-pressure cylinder, including an outer cylinder 1, an inner cylinder 2, a steam inlet pipe 3 and an exhaust pipe;

[0049] The outer cylinder 1 includes an upper half outer cylinder 11 and a lower half outer cylinder 12, and the inner cylinder 2 includes an upper half inner cylinder 21 and a lower half inner cylinder 22;

[0050] The inner cylinder 2 is arranged in the outer cylinder 1 in a cylindrical shape, and there is an interlayer between the inner cylinder 2 and the outer cylinder 1. The inner cylinder 2 is provided with a steam inlet chamber, and the inner cylinder 2 is provided with a heat shield 7;

[0051] The steam inlet pipe 3 passes through the lower half of the outer cylinder 12 and communicates with the steam inlet chamber, and the exhaust pipe communicates with the lower half of the outer cylinder 12;

[0052]Th...

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Abstract

The invention discloses a temperature balancing structure of a cylindrical cylinder of a steam turbine. The temperature balancing structure comprises an outer cylinder, an inner cylinder, a steam inlet pipe and a steam exhaust pipe, the outer cylinder comprises an upper half outer cylinder and a lower half outer cylinder, and the inner cylinder comprises an upper half inner cylinder and a lower half inner cylinder; the inner cylinder is arranged in the outer cylinder, an interlayer is arranged between the inner cylinder and the outer cylinder, and the inner cylinder is provided with a steam inlet chamber; the steam inlet pipe penetrates through the lower half outer cylinder to be communicated with the steam inlet cavity, and the steam exhaust pipe is communicated with the lower half outer cylinder. An annular steam inlet partition plate located in an interlayer is arranged in the outer cylinder, the steam inlet partition plate is in clearance fit with the inner cylinder for steam sealing, the steam inlet partition plate is located on the side, between the steam inlet pipe and the steam exhaust pipe, of the steam inlet pipe, and gaps between the steam inlet partition plate and the inner cylinder are non-evenly distributed in the circumferential direction. The temperature balance structure of the steam turbine cylindrical cylinder can reduce the steam leakage amount, reduce the flow difference of steam leaked from the upper half and the lower half of the cylinder, and slow down the deformation difference of the upper half and the lower half of the outer cylinder.

Description

technical field [0001] The invention relates to a temperature balance structure of a cylindrical cylinder of a steam turbine, belonging to the technical field of steam turbines. Background technique [0002] The steam flow in the traditional high-pressure steam inlet chamber enters the through-flow vane row from the two steam inlet inner pipes of the lower half outer cylinder of the steam turbine, and the inner steam inlet pipe connects with the inlet of the cylinder-type inner cylinder steam inlet chamber through a sealing structure. Due to the high temperature of the inlet steam, the inlet steam pipe, steam seal and inner cylinder will be deformed to varying degrees during the repeated start and stop process, and the original good sealing structure may partially fail, so that the high-temperature initial steam passes through the inlet steam pipe and the inner cylinder. The splicing position of the high-pressure inner cylinder enters between the interlayer of the inner cyli...

Claims

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Application Information

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IPC IPC(8): F01D25/26
CPCF01D25/26
Inventor 平艳朱莹孙奇钟主海范小平杨长柱陈阳黄元东
Owner DONGFANG TURBINE CO LTD