What causes the deformation of the cooler
Source: http://le-signal.com/ Time: 2019-01-24
In the common failure of the cooler, the deformation frequency is not small. What are the causes of the deformation problem? How can such problems be avoided in practice?
Due to the extremely uneven temperature distribution of the tubular oil cooler during use, the weld and the welded side of the weld are in high temperature areas, and the shrinkage produced after cooling is large, while the shrinkage is small in low temperature areas. This imbalance causes The change of the shape of the tube sheet 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 tube-type oil cooler causes the transverse contraction deformation and the longitudinal contraction deformation to cause the tube sheet to deform flexibly. 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 tube sheet oil cooler tube sheet uses thinner materials and less rigidity, which is also the cause of 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.
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