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Large generator set bearing alloy casting and welding matching method

A technology for bearing alloys and generator sets, which is applied in the field of large-scale generator bearing bush manufacturing, can solve the problems of low production efficiency, high defective rate and repair rate of Babbitt alloys, and deformation of tile billets, etc., so as to improve production efficiency and product quality. The quality and product repair rate decrease, and the effect of reducing tile deformation and repair rate

Inactive Publication Date: 2021-06-29
HARBIN ELECTRIC MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to solve the problem of low production efficiency, poor quality and low deformation of tile blanks, such as thrust tiles of large generator sets and nuclear power sealing tiles, which have grooves and require high precision. In order to solve the problems of high failure rate, defective rate and repair rate, a production method of alloy casting and welding for large-scale generator set bearings is provided

Method used

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  • Large generator set bearing alloy casting and welding matching method

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Effect test

Embodiment 1

[0017] Clean up the oil, rust and processing burrs on the hanging casting surface of the tile blank 1, preheat the tile blank 1 to 160°C and keep it warm for 1 hour; brush the tin enamelling agent evenly on the hanging casting surface of the tile blank 1, and then soak the tile blank 1 Put it into the tin pot, the temperature of the tin liquid in the tin pot is 300°C, and the soaking time is 20 minutes. After the tile billet 1 is lifted out of the tin pot, the tin-coated surface presents a uniform silver-white mirror state; after the tile billet 1 comes out of the tin pot, it is quickly assembled, Put it together and fix it, the notch of the bearing bush completely falls into the notch of the mould; preheat the pouring spoon to 200°C, and cast a layer of Babbitt alloy 2 with a thickness of 3.5mm on the surface of the tile billet 1 by static casting method, and pre-cool after casting After 1 minute, open the cooling water pipe for cooling, the cooling time is 10 minutes, and the...

Embodiment 2

[0019] Clean up the oil stains, rust and processing burrs on the hanging casting surface of the tile blank 1, preheat the tile blank 1 to 180°C and keep it warm for 1.5h; brush the tin varnish evenly on the hanging casting surface of the tile blank 1, and then put the tile blank 1 Soak in a tin pot, the temperature of the tin liquid in the tin pot is 300°C, and the soaking time is 25 minutes. After the tile billet 1 is lifted out of the tin pot, the tin-coated surface presents a uniform silver-white mirror state; the tile billet 1 is assembled quickly after it comes out of the tin pot , and fix it, and the bearing bush notch completely falls into the mold notch; a layer of Babbitt alloy with a thickness of 4.0mm is cast on the surface of the tile billet 1 by centrifugal casting method, and before the tile billet 1 enters the centrifuge for pouring, the pouring spoon , ladle and sprue cup are preheated, the sprue cup is preheated to 180°C, the ladle is preheated to 280°C, the su...

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Abstract

The invention discloses a large generator set bearing alloy casting and welding matching method. According to the method, casting and welding are combined, the problems of composition segregation, multiple surface defects and the like caused in the large generator set bearing alloy casting process are solved, the defects of large tile blank deformation and low production efficiency caused by welding are overcome, the production efficiency and the product quality of a large generator set bearing alloy can be improved, the defective rate and the repair rate are reduced, and the method is particularly suitable for producing and manufacturing the Babbitt metal on the surface of the thin-wall tile blank with grooves and high precision requirements.

Description

technical field [0001] The invention relates to the field of large-scale generating set bearing bush manufacturing, in particular to a production method for babbitt alloy casting and welding cooperation on the bearing bush surface with grooves and high precision requirements. Background technique [0002] The bearing bush of a large generator set carries the weight of the rotating parts. In order to ensure the rotation accuracy of the shaft and reduce the friction between the shaft and the parts on the shaft, a layer of bearing alloy with good wear resistance and friction reduction is usually prepared on the surface of the bearing bush, also known as Babbitt. alloy. The production methods of Babbitt alloy on the surface of the bearing pad mainly include casting and welding. For the bearing pad with grooves on the surface of the tile billet, such as figure 1 , figure 2 As shown, the casting method has the advantages of high production efficiency and the bearing pad base is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 贾朋刚吴英霍岩李景文道维吴彦军欧阳孔良葛光男陶韬刘毅侯世璞吴双辉王清宇
Owner HARBIN ELECTRIC MASCH CO LTD
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