Based on the analysis of the working process of the vane ofvane-type oxygen-adding machine under water, the paper puts forward the theorythat under stable operations, the moment of resistant force acted on the vane bythe water is mainly composed of two parts: the coherent moment of resistantforce and the working moment of resistant force. The paper also sets up thetheoretical formulas for calculating the total moment of resistant force andpower exhaustion. These theoretical formulas are varified through the calculation of power ex-haustion of machines with various power through and they are of...
