In the production process of the train crane tube, the heating process is actually the heat transfer process of the heat source. The temperature difference is the basic condition for heat transfer. Only when there is a temperature difference can heat transmission occur. According to the change in the temperature of the object during the heat transmission process, heat transfer It can be divided into two states: stable heat transfer and unstable heat transfer. There are three commonly used heating methods as follows.
One, radiation. Convection and conduction two heat transfer methods must be the contact between the train and the tube to transfer heat energy, while radiation is the heat transfer method that conducts heat energy from one object to another without contact between objects.
Two, conduction. Conductive heat transfer is generally transferred from the high temperature part of the same object to the low temperature part, and can also be transferred from the high temperature object to the low temperature object in close contact with it.
Three, convection. The convective heat exchange of the train crane tube is due to the transfer of heat energy from high temperature to low temperature during the contact process when the fluid moves in a macroscopic manner. Therefore, the medium of this heat transfer method can only be liquid and gas. Convective heat exchange can occur between the fluid and the solid surface, or within the fluid.
During the heating process of the train crane tube, the temperature in various places is constantly changing, and finally it can achieve the expected effect in the production process, making the later use safer.
