Causes of deformation of the cooler
Source: http://le-signal.com/ Time: 2017-02-15
In the common failure of the cooler, the deformation frequency is not small. What are the causes of the deformation problem? How to avoid such problems in practice:
Due to the extremely uneven temperature distribution of the cooler during use, the weld and the welded side of the weld are in a high temperature region, and the shrinkage produced after cooling is large, while the shrinkage in the low temperature region is small. This imbalance causes the tube sheet shape The change of the shape is related to the specific structure, the position of the weld and the shrinkage of the weld itself.
Generally, the welding method adopted by the cooler causes the transverse shrinkage deformation and the longitudinal shrinkage deformation to cause the bending deformation of the tube sheet. During use, the angular deformation of the weld due to the lateral shrinkage of the weld is related to the thickness of the plate, the size of the weld and the energy of the welding line. This is the main factor that deforms the sealing surface. The material used for the tube sheet is thinner and less rigid, which is also the cause of the deformation. At the same time, because the temperature of the welding surface is higher than the back surface, the compressive plastic deformation of the welding surface is greater than the back surface, and sometimes the back surface may even undergo tensile plastic deformation under the action of bending moment, so large angular deformation will occur after cooling.
From the above analysis, we can see that deformation has a great relationship with the quality of production and processing, which means that everyone must pay more attention to the manufacturer in the purchase. It can not be based on price alone. It is necessary to choose a brand with an influential supply. Business cooperation.
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