No abstract

The effects of electric current, the altitude of the liquid outlet and liquid level change within crucible in direct-current electromagnetic pump (EMP) used to quantitative pouring of aluminum alloy on flow rate were studied. The results show that the effects of electric current on flow rate is affected by the hydraulic resistance; flow rate decrease with the increasing of the altitude of liquid outlet; when the output of aluminum alloy is large, the liquid level change within crucible have a significant impact on flow rate.

Compared with other factors, overland flow losses have stronger influence on the efficiency of direct-current conduction electromagnetic pump for casting. Mercury-media simulation of direct-current conduction electromagnetic pump is used. The mechanism of overland flow losses by changing the structure of liquid inlet was studied and got effective method of inhibiting overland flow losses. It can provide theoretical support for improving the efficiency of direct-current conduction electromagnetic pump.

The relationship between the groove structure of the direct current plane electromagnetic pump and efficiency has been investigated in this paper. Methods By using mercury as working medium, experiments have been conducted through simulation of direct current plane electromagnetic pump. The comparision of efficiencies is obtained by measuring the values of hydrostatic head of various groove structures under the fixed working parameters are measured. The groove structure of the electromagnetic pump has a great influence on its hydrostatic head and its relative efficiency. Several important ways can be used to improve the efficiency of the electromagnetic pump including restraining the overflow of working current, optimizing the direction of the electrolines, reducing the inner surface area of the groove and increasing the entrance force.