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Crystallizer for MW (megawatt)-scale wind power torsion shaft electroslag casting

A technology of electroslag casting and mold, applied in the field of casting molds, can solve the problems of complex shape, restricting development, complex structure of mold for electroslag casting, etc., and achieves the effect of high positioning accuracy and no large deformation

Inactive Publication Date: 2014-08-20
SHENYANG RES INST OF FOUNDRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As we all know, the torsional shaft structure of MW-level wind power is complex (see figure 1 ), each crank is distributed along the space, and the shape is complex
Therefore, the structure of the mold for MW-level wind power torsion shaft electroslag casting is more complicated, and it cannot be manufactured and used according to conventional methods, which has restricted the development of this type of casting in my country for a long time

Method used

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  • Crystallizer for MW (megawatt)-scale wind power torsion shaft electroslag casting
  • Crystallizer for MW (megawatt)-scale wind power torsion shaft electroslag casting
  • Crystallizer for MW (megawatt)-scale wind power torsion shaft electroslag casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 1. Determine the mold parting scheme, the increase in the transitional cavity between the crank mold and the conventional shaft mold:

[0056] First, design the parting scheme of the wind power torsion axis crystallizer according to the part drawing (see figure 2 ), the splitting scheme determines the success or failure of the crystallizer. According to the number of cranks, the torsion axis crystallizer is divided into 5 sections and 10 split-type combined crystallizers. The parting position 19 is divided into section I21, section II22, section III23, section IV24 and section V25. Secondly, a transition cavity is designed at the thickest part of the crank arm. The size of the transition cavity is determined by the uniform seamless transition time between the power at the thickest part of the crank arm and the normal shaft power. After calculation and verification, it is finally determined that the uniform seamless transition time is about 1 hour, and then the height ...

Embodiment 2

[0067] 1. Determine the mold parting scheme, the increase in the transitional cavity between the crank mold and the conventional shaft mold:

[0068] Design the parting scheme of the wind power torsion axis crystallizer according to the parts drawing (see image 3 ), according to the number of cranks, the torsion axis crystallizer is divided into 5 sections and 10 split-type combined crystallizers, and the type position 19 is divided into section I21, section II22, section III23, section IV24 and section V25. The height of the transition cavity is 150mm, and the increased transition cavity is added to the crank crystallizer with a circular transition.

[0069] 2. Design and manufacture of crystallizer

[0070] The crystallizer structure for MW-level wind power torsion shaft electroslag casting is as follows: Figure 4~13 As shown, it is composed of inner cavity type plate 5, water seam plate 11 and water jacket plate 12 through upper flange 1, lower flange 2 and legislative ...

Embodiment 3

[0079] The electroslag casting of the crystallizer provided in Example 1 is used to prepare the torsion shaft for wind power generators, and the process parameters are as follows:

[0080] The composition and weight percentage of the consumable electrode used are shown in Table 1. The electrode size: Φ200×13000 mm.

[0081] Table 1 GS-18NiMoCr3-6 steel consumable electrode composition and weight percentage

[0082] C% Si% Mn% S% P% Cr% Ni% Mo% Fe 0.18 0.43 1.05 0.002 0.018 0.74 0.99 0.61 margin

[0083] Electroslag casting:

[0084] 1) The electroslag casting process is to refine the above-mentioned consumable electrodes and make them into castings. The proportion of slag system is weight percentage: CaF 2 : 60%, Al 2 o 3 : 30%, MgO: 5%, and CaO: 5%. The amount of slag is 3% of the casting weight.

[0085] 2) Ignition method

[0086] The consumable electrode is ignited by solid slag in the crystallizer, and its chemical compositio...

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Abstract

The invention aims to provide a crystallizer for MW (megawatt)-scale wind power torsion shaft electroslag casting, so as to provide a core device for casting production by an electroslag casting method. Wind power torsion shaft blanks generated by the crystallizer achieve excellent surface moulding quality and inner portion quality, and completely satisfy or exceed technical requirements. The crystallizer, which is convenient to prepare, has the advantages of being labor-saving and material-saving and being convenient in casting operation, accurate in assembling and positioning operation, having high cast metal utilization rate and the like. In addition, when the crystallizer is in use, a retreating apparatus, a temperature monitoring apparatus and a positioning apparatus are adopted, and the crystallizer stands the production test in terms of various indexes, without common crystallizer damages of slag leakage, water leakage, weld crack and deformation and the like.

Description

technical field [0001] The invention provides a mold for casting, and in particular relates to a mold for integrally manufacturing a MW-level wind power torsion shaft blank by electroslag casting—a mold for electroslag casting of a MW-level wind power torsion shaft. Background technique [0002] As an advanced casting technology, electroslag casting combines the two processes of molten steel refining and casting molding. The castings produced have uniform and dense crystal structure, high purity, low sulfur and phosphorus content, less non-metallic inclusions, and good Mechanical properties and fatigue resistance. It can not only meet the quality standard of forgings, but also realize the near-net shape of castings, and realize the win-win situation of cycle and cost. It has been widely used by modern foundry enterprises. The products involve modern industries such as aviation, shipbuilding, electric power, chemical industry and heavy machinery. [0003] Wind power is curr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D23/10
Inventor 娄延春王安国弥尚林唐骥王大威蒋国森马洪波王云霞
Owner SHENYANG RES INST OF FOUNDRY
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