Taking the concrete spiral case seawater circulating pump gearbox as study object

the thermal balance equation is established by means of thermal network.Then the equation is solved by establishing a calculation model of the power consumption

thermoresistance

convection coefficient of heat transfer.Thus it could predict the key nodes temperature of circulating pump gearbox

and then the security

stability of the key position of circulating pump gearbox are proved.Meanwhile this result provides the data for the optimization of gearbox.