Anti-deformation machining method of medium-pressure air inlet sealing ring of medium-pressure outer cylinder of steam turbine

A processing method and air inlet technology are applied in the field of anti-deformation processing of sealing rings, which can solve the problems of poor product quality and high deformation, and achieve the effect of ensuring product processing quality, drawing size and roughness.

Active Publication Date: 2018-10-09
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of poor product quality caused by the high deformation of the inner diameter or outer diameter of the seal ring of the medium-pressure outer cylinder of the steam turbine mediu

Method used

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  • Anti-deformation machining method of medium-pressure air inlet sealing ring of medium-pressure outer cylinder of steam turbine
  • Anti-deformation machining method of medium-pressure air inlet sealing ring of medium-pressure outer cylinder of steam turbine

Examples

Experimental program
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Effect test

Example Embodiment

[0025] Specific implementation mode one: combine figure 1 and figure 2 Description In this embodiment, the anti-deformation processing method for the sealing ring of the medium-pressure outer cylinder of the steam turbine medium-pressure inlet is carried out according to the following steps:

[0026] 1. Take the steel plate blank, fix the steel plate blank on the lathe, and carry out rough turning of the outer circle, inner circle and upper and lower end faces. During the rough turning, a 2mm machining allowance is reserved on each side to obtain the rough turning blank;

[0027] 2. Natural aging treatment for rough car blanks for 46 to 50 hours;

[0028] 3. Measure the actual size of the rough turning blank, and process the matching cast iron mold according to the measured size. The interference between the cast iron mold and the rough turning blank is 0-0.01mm; for the outer circle, inner circle and upper and lower end faces of the rough turning blank Carry out semi-finis...

Example Embodiment

[0036] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the cutting parameters for rough turning of outer circle, inner circle and upper and lower end faces as described in step 1 are: cutting depth 0.4-0.6 mm, feed rate 0.2 ~0.5mm / r, cutting speed is 14~16m / min. Other steps and parameters are the same as those in the first embodiment.

Example Embodiment

[0037] Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that: the outer diameter of the rough turning blank in step 1 is 522.5±0.13; the inner diameter of the rough turning blank is 492.8±0.025. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses an anti-deformation machining method of a medium-pressure air inlet sealing ring of a medium-pressure outer cylinder of a steam turbine, relates to an anti-deformation machining method of a sealing ring, and aims to solve the problem of weak product quality caused by high deformation quantity of the inner circle diameter or the outer circle diameter of the medium-pressure air inlet sealing ring of the medium-pressure outer cylinder of the steam turbine. A blank is roughly turned; the rough-turned blank is naturally aged; the semi-finish turning is performed on the blank; the blank is naturally aged after the semi-finish turning; a cast iron mold is positioned on a lathe worktable for clamping alignment; the upper plane of the cast iron mold is turned; the outer circle and end surface alignment is performed on the blank after the semi-finish turning; the outer circle, the inner circle and the upper and lower rend surfaces of the blank after the semi-finish turning are turned; then, the machined blank after the semi-finish turning is naturally aged; the designed sizes of the outer circle and the inner circle are reached through turning; and the upper and lowerend surfaces are grinded to reach the designed sizes. The diameter deformation quantity of the inner circle and the outer circle of the machine sealing ring is lower than 0.02 mm. The method is suitable for sealing ring machining.

Description

technical field [0001] The invention relates to an anti-deformation processing method for a sealing ring. Background technique [0002] The sealing ring of the medium pressure inlet of the medium pressure outer cylinder of the steam turbine is a thin-walled workpiece, the cross section of the sealing ring is rectangular, the material is 1Cr12Mo / B / HJ462, the outer diameter of the sealing ring is 522.5±0.13mm, and the inner diameter is 492.8±0.025mm , the verticality between the inner peripheral surface and the upper and lower end surfaces is 0.02mm, the width is 14.55±0.05mm, the parallelism between the two ends is 0.01mm, and the wall thickness is 15mm; the existing processing method is to use a horizontal lathe to process the outer tire according to the inner circle. Round and upper and lower end faces, and then match the outer circle with cast iron tires to process the inner circle and upper and lower end faces; after processing, the sealing ring often has irregular deform...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 隋朝龙刘发吴洋黄揆
Owner HARBIN TURBINE
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