Centre spinning cold gas, fog cooling system and method

Abstract

The invention discloses an air fog cooling system and an air fog cooling method for a centrifugal casting cold mold. The cooling system comprises a water collecting pipe, an air header and a plurality of groups of air fog cooling nozzles, wherein the water collecting pipe and the air header are arranged parallel to the axial line of a centrifugal machine, each group of air fog cooling nozzles are provided with a water inlet connected with the water collecting pipe, an air intake connected with the air header and an air fog mixing spray head respectively, the air fog mixing spray heads are arranged towards a centrifugal casting mold to mix compressed air entering the air intake and high pressure water entering the water inlet according to the adjusted proportion into fog and then spray the fog to corresponding outer surfaces of the cold mold from nozzle mouths. The system and the method realize the adjustment of a temperature field during the centrifugal casting, realize the effective control of structural segregation and open grain during the solidification, and have functions of slowing the structural segregation and the open grain of a working layer, can realize the effective control of the upper and lower corrosion amount and the quality of a bonding layer during the vertical core-filling, and have functions of reducing the thickness difference of the working layer and improving the quality of the bonding layer at both ends of a roller.

Description

technical field [0001] The invention relates to the field of centrifugal manufacturing, in particular to a gas and mist cooling system and method for centrifugal casting process cooling. Background technique [0002] As everyone knows, the existing centrifugal casting roll cooling method is that the rotating mold is naturally cooled in the air, and there is no control ability. Taking the pouring and cooling of Φ1250×5000 roll as an example, the wall thickness of the traditionally designed cold form is about 300mm, and the weight of the cold form is 73000Kg. Taking the cast ICDP roll as an example, figure 1 , figure 2 They are respectively the cloud diagram of the temperature distribution of Φ1250×5000 roll working layer using traditional centrifugal casting cold mold natural cooling CAE and the corresponding temperature distribution diagram. image 3 shown. [0003] Due to the centrifugal roll casting, especially the centrifugal casting of high-alloy cast iron rolls cont...

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Problems solved by technology

[0003] Due to the centrifugal roll casting, especially the centrifugal casting of high-alloy cast iron rolls containing graphite and carbide, the control of its structure is mainly realized by the quenching of the mold, and the cooling capacity of the mold varies with the heat storage and time of the mold. Therefore, the structure of the outer layer of the roll in the traditional process method inevitably has unevenness, and the structure of the outer layer gradually becomes coarser inward, resulting in a significant decline in the performance of the roll in the middle and late stages of use; moreover, due to the centrifugal roll core filling The composite

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