| 摘要 |
PROBLEM TO BE SOLVED: To improve the rotation efficiency of a motive power device by reducing the portion of gas flow which blows out from a master rotor but does not contribute to its rotation resulting in a loss. SOLUTION: This motive power device is provided with a sealed outer shell 10, a master rotor 20 rotatably and pivotally supported by the outer shell 10, on one end of which a gas inlet 21 is formed and on the other end a gas outlet 22 formed, and a slave rotor 30 which is installed rotatably in relation to the outer shell 10 and master rotor 20 and a wall part of which is located therebetween. The gas is flowed through one flow path Ra which passes from the inlet 21 to the outlet 22 of the master rotor 20 through the inside thereof and the other flow path Rb from the outlet 22 to the inlet 21 through the outside thereof to impart a temperature difference to the gas, and thus the convection of gas is generated. The convection rotates the master and slave rotors 20 and 30 to obtain a motive power. Further, there is provided, at the other end of the rotor 20, a turbine 40 for imparting a turning force to the master rotor 20 by injecting the gas from the outlet 22 reversely against the outer rotation peripheral direction of the rotor 20.
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