CN106513976A

CN106513976A - Pressurization welding method of double-spoke plate turbine disc

Info

Publication number: CN106513976A
Application number: CN201611139377.0A
Authority: CN
Inventors: 张乘齐; 曹健; 徐华胜; 黄文周; 孙飞*; 孙飞; 周江锋
Original assignee: China Gas Turbine Research Institute
Current assignee: AECC Sichuan Gas Turbine Research Institute
Priority date: 2016-12-12
Filing date: 2016-12-12
Publication date: 2017-03-22
Anticipated expiration: 2036-12-12
Also published as: CN106513976B

Abstract

The invention relates to a pressurization welding method of a double-spoke plate turbine disc. In the method, a graphite pressing head (1), an upper base plate (2), graphite force bearing pillars (3), a lower base plate (4), a graphite base (5), a plurality of graphite force bearing blocks (6) and a double-spoke plate turbine disc blank (7) are applied, wherein the double-spoke plate turbine disc blank (7) is shown in the drawing 2; the double-spoke plate turbine disc blank comprises two blank discs in longitudinal symmetry; the two blank discs comprise annular welding parts 12, pressurization force applying parts 13 and non-welding easy-deformation parts (10, 11); and the method comprises six steps. According to the pressurization welding method, the welding deformation amount of the double-spoke plate turbine disc is controlled through graphite blocks and stainless steel sheets, the structure is simple, the assembly and disassembly are convenient, and interchangeability and economy are relatively good.

Description

A kind of pair of disc turbine disk pressurization welding method

Technical field:

Aero-engine, gas turbine wheel disk manufacture field.

Background technology is described：

Double disc turbine disks are a kind of new aero-engine turbine disk structures, and the version has bearing capacity By force, thermal inertia and mechanical inertia are little, lightweight feature, can effectively realize the loss of weight of engine turbine modular construction.Generally By two and half disks of left and right by being formed by welding, the technology difficulty for manufacturing and welding is big.

The common pair of disc turbine disk is typically connected using the stressed diffusion of high-temperature vacuum, due to having one inside disk body Individual hollow cavity volume, cannot be reprocessed after welding, therefore its physical dimension must be processed in place before welding, its structure shape The particularity of formula causes welding procedure difficulty big, as high-temperature soldering inevitably causes part deformation, accordingly, it would be desirable to design A kind of apparatus for welding and positioning guarantees that the deformation of the turbine disk is as little as possible, while needing to ensure the connection reliability of welding.

Invention description：

The welding method the present invention relates to a kind of pair of disc turbine disk pressurizes, by the double spokes of the control such as graphite block and stainless steel substrates Plate turbine disk welding deformation amount, simple structure, is convenient to mount and dismount, interchangeability and better economy.

A kind of pair of disc turbine disk pressurization welding method is provided, as shown in figure 1, applying graphite pressure head (1), upper pad in method Plate (2), graphite bearing column (3), lower bolster (4), graphite base (5), multiple graphite force-bearing pieces (6) and double disc turbine disk blanks (7)；

Double disc turbine disk blank (7) structures are as shown in Fig. 2 described double disc turbine disk blanks are laterally zygomorphic two Individual blank disc；In two blank discs include girth weld 12, pressurization force section 13 and the yielding portion of non-solder (10, 11)；

Described method comprises the steps：

Step one, by graphite base (5), multiple graphite bearing columns (3) and lower bolster (4) be placed in pressurization soldering furnace in, make Obtain lower bolster (4) to cover on graphite base (5), multiple graphite bearing column (3) are placed on lower bolster (4), and multiple graphite loads Post (3) crosses welding region；

Step 2, it is placed in two blank disc upper-lower positions of double disc turbine disk blanks symmetrical in pressurization soldering furnace, So that two blank discs are located in welding region, and the pressurization force section 13 of lower blank is pressed on lower bolster；

Step 3, graphite force-bearing piece (6) is placed between the yielding portion of non-solder of upper and lower blank disc and is supported；

Step 4, upper padding plate (2) is covered in multiple graphite bearing column (3) and the pressurization force section of upper blank of welding region On 13；

Step 5, graphite pressure head (1) is pressed on upper padding plate in advance；

Step 6, according to pressurization welding parameter pressurization welding is carried out to upper and lower blank.

Further, graphite force-bearing piece includes outer rim graphite block (6) and internal ring force-bearing piece (8).

Further, graphite bearing column (3) includes disk edge bearing column and core bearing column (9).

Technique effect：

A) simple structure, easily reliability, realization；

B) deformation that the double disc turbine disk welding of energy effective control are produced, it is ensured that weld successfully.

Description of the drawings：

Welded and installed schematic diagram in the double disc turbine pan burners of Fig. 1

The double disc turbine disk blahk structures of Fig. 2

Wherein：1- graphite pressure heads；2- upper padding plates；3- graphite bearing columns；4- lower bolsters；5- graphite bases；6- graphite loads Block；The double disc turbine disk blanks of 7-；8- internal ring force-bearing pieces；9- core bearing columns, the yielding portion of 10- non-solder；11- non-solder is easy Variant part；12- girth welds；13- pressurizations force section.

Specific embodiment：

Concrete a kind of pair of disc turbine disk pressurization welding method, as shown in figure 1, apply graphite pressure head (1), upper pad in method Plate (2), graphite bearing column (3), lower bolster (4), multiple graphite bases (5), graphite force-bearing piece (6) and double disc turbine disk blanks (7)；

Described method comprises the steps：

Step one, by graphite base (5), multiple graphite bearing columns (3) and lower bolster (4) be placed in pressurization soldering furnace in, make Obtain lower bolster (4) to cover on graphite base (5), multiple graphite bearing column (3) are placed on lower bolster (4), and, multiple graphite loads Post (3) crosses welding region；

Graphite pressure head (1), bearing column (3), graphite base (5), outer rim graphite block (6), internal ring force-bearing piece (8), core hold The material of power post (9) etc. is highly purified graphite, and high purity graphite has higher elevated temperature strength, the characteristics of thermal deformation is little, There is preferable mechanical property near double disc turbine disk welding temperatures.Upper padding plate (2) and lower bolster (4) are used for balancing double disc disks The welding pressure being subject on along the circumferential direction, respectively positioned at the both sides up and down of weldment, is stainless steel material, scribbles welding resistance above Agent, to prevent from bonding together with other parts in welding process.

Bearing column (3), outer rim graphite block (6), internal ring force-bearing piece (8) may each be piecemeal or whole coil structures, core load Post (9) is cylindrical structure.

Operation principle

Being mainly characterized by of this method adds the graphite block of control deformation, in welding process, stone in soldering furnace Welding pressure is uniformly applied on the pressurization force section (13) of double disc disk blanks by black pressure head (1) by upper padding plate (2), welding Carry out under vacuum environment, therefore, in the presence of pressure and temperature, double disc disk blank (7) can occur to a certain degree Deformation, according to disk edge girth weld (12) mechanical property difference require, different outer rim graphite loads can be designed The thickness of block (6) and internal ring force-bearing piece (8), with play in welding process double disc disk blank (7) of control control disk edge and The purpose of the deflection of core position.Graphite bearing column (3) and core bearing column (9) have then been played to double disc disk blank (7) The protective effect of effect, prevents under big welding pressure, and double disc disk blank (7) are caused welding to be lost by graphite pressure head (1) be collapsed Lose.

Claims

1. a kind of pair of disc turbine disk pressurization welding method, applies graphite pressure head (1), upper padding plate (2), graphite bearing column in method (3), lower bolster (4), multiple graphite bases (5), graphite force-bearing piece (6) and double disc turbine disk blank (7)；

Double disc turbine disk blank (7) structures are as shown in Fig. 2 described double disc turbine disk blanks are laterally zygomorphic two hairs Base disk；In two blank discs include girth weld 12, pressurization force section 13 and the yielding portion of non-solder (10,11)；

Described method comprises the steps：

Step one, by graphite base (5), multiple graphite bearing columns (3) and lower bolster (4) be placed in pressurization soldering furnace in so that under Backing plate (4) is covered on graphite base (5), and multiple graphite bearing column (3) are placed on lower bolster (4), and, multiple graphite bearing columns (3) cross welding region；

Step 2, it is placed in two blank disc upper-lower positions of double disc turbine disk blanks symmetrical in pressurization soldering furnace so that Two blank discs are located in welding region, and the pressurization force section 13 of lower blank is pressed on lower bolster；

Step 4, upper padding plate (2) is covered in multiple graphite bearing column (3) and the pressurization force section 13 of upper blank of welding region On；

2. a kind of pair of disc turbine disk according to claim 1 pressurizes welding method, it is characterised in that：Graphite force-bearing piece bag Include outer rim graphite block (6) and internal ring force-bearing piece (8).

3. a kind of pair of disc turbine disk according to claim 1 pressurizes welding method, it is characterised in that：Graphite bearing column (3) disk edge bearing column and core bearing column (9) are included.