First of all, it is certain that the heat conduction oil pump energy is lost in the process of conveying heat conduction oil, mainly in the following aspects:
Only part of the mechanical energy obtained by the pump from the prime mover is converted to liquid energy, while part of the other part is lost due to internal consumption of the pump. All losses in the pump can be divided into the following categories
1: hydraulic loss caused by the impact of the liquid in the pump, eddy current and surface friction. Shock and eddy current losses are caused by fluid flow changing direction. Fluid flowing through the contact channel will always appear surface friction, the resulting energy loss depends on the length, size, shape, surface roughness of the channel, as well as the flow rate and characteristics of the liquid.
2: volume loss volume loss is the result of a part of the liquid energy channeling in the pump and outward leakage. The volumetric efficiency of pumps is generally 0.93-0.98. Improving the sealing ring and sealing structure can reduce the leakage and improve the volume efficiency.
3: mechanical loss mechanical loss refers to the friction loss between the side of the impeller cover plate and the liquid in the pump shell, that is, the disc loss, and the friction loss of the pump shaft in the movement of mechanical parts such as the root, bearing and balancing device, generally with the former as the main.
