Variable-area speeder of solar photo-thermal power generation system

The invention discloses a variable-area speeder of a solar photo-thermal power generation system. According to the variable-area speeder of the solar photo-thermal power generation system, based on the fact that the relationship between the rotational speed of a generator and the quantity of steam of the generator is positive correlation and the relationship between the quantity of the steam and the amount of obtained heat energy is positive correlation, the variable-area speeder is additionally arranged between a molten-salt heat-storage chamber and a steam generating chamber, the heating area of a heating panel is changed through the variable-area speeder, so that heat energy transmitted into the steam generating chamber is changed, the quantity of the steam generated in the steam generating chamber is changed, and finally the purpose that the rotational speed of the generator is changed can be achieved. The variable-area speeder of the solar photo-thermal power generation system comprises a heating-area adjusting device, a linear driving device, a stepping motor, a coupling, a locking nut, a dovetail-groove guide rail, a shaft sleeve seat cover plate, a shaft sleeve, a cover plate, a heat-transmitting panel with a heat-transmitting rib plate and the heating panel.