Soldering structure and soldering method for machinable seal structual parts

A sealing member, machinability technology, applied in welding equipment, engine components, blade support components, etc., can solve problems such as the inability to play the function of honeycomb seals and the severe loss of turbine rotor blades, achieve high precision and reliable guarantee, The effect of suppressing penetration

Inactive Publication Date: 2007-04-25
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this machinability is reduced, the loss of the turbine rotor blade becomes severe, so it cannot function as a honeycomb seal 1

Method used

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  • Soldering structure and soldering method for machinable seal structual parts
  • Soldering structure and soldering method for machinable seal structual parts
  • Soldering structure and soldering method for machinable seal structual parts

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Embodiment Construction

[0031] An embodiment of the present invention will be described below with reference to the drawings.

[0032] As shown in FIG. 3 , the honeycomb seal 1 is fixed by brazing to the upper surface (inner peripheral surface) of the base material (separator ring, etc.) 10 on the casing side opposite to the rotary turbine blade (not shown). In order to have machinability in the direction A perpendicular to the plate surface of the base material 10 and sealability in the direction B parallel to the same plate surface, the honeycomb seal 1 has a honeycomb cell region structure composed of voids and partition walls. The plate-like body is formed, and the symbol 3 in the same figure represents a plurality of cells (cell regions) in the shape of a honeycomb (honeycomb).

[0033] The honeycomb seal 1 forms a honeycomb unit 3 by vertically combining a plurality of corrugated thin plates 2 on the plate surface in the vertical direction A, so there is a small gap at the overlapping portion 4...

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Abstract

The present invention is one kind of brazed structure and brazing method for sealing member capable of being cut without lowering the sealing performance. The technological process includes the following steps: inserting the cutable honeycomb sealing member into covering board and to certain depth for area covering; attaching antiseepage agent onto the honeycomb sealing to form antiseepage agent film; eliminating the covering board; inserting the brazed surface of the honeycomb sealing into brazing material board in the bottom material; and brazing in hearting furnace to the required depth.

Description

technical field [0001] The present invention relates to, for example, a brazing structure of a machinable sealing member provided to face an inner wall surface of a turbine housing side and a turbine rotor blade, and a brazing method thereof. Background technique [0002] This machinable sealing member can be seen as a honeycomb structure when viewed from the turbine rotor blade, so it is generally called a honeycomb seal. [0003] The honeycomb seal is a thin-walled and thick-plate-shaped sealing material pasted on the inner peripheral surface of the casing-side separating ring at the opposite side of the rotating blade behind the gas turbine, and seals the gap between the rotating blade of the turbine and the separating ring. The honeycomb seal is formed to have good machinability (easy to cut), and when the front end of the turbine rotor blade contacts for some reason (thermal expansion, etc.), it is cut by its own surface to prevent the turbine rotor blade from contact w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/20F01D5/00F01D5/30F01D11/02F02C7/28
Inventor 大原稔
Owner MITSUBISHI HEAVY IND LTD
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