Combined centripetal turbine of small gas turbine

The utility model discloses a combined centripetal turbine of a small gas turbine. The combined centripetal turbine comprises a left high-temperature gas inlet section and a right low-temperature gas outlet section which are fixedly connected in the axial direction. The connecting parts of the center discs of the left high-temperature air inlet section and the right low-temperature air outlet section are connected in an end face tooth groove matching mode to achieve positioning and load transmission, and the connecting parts of the blades of the left high-temperature air inlet section and the right low-temperature air outlet section are in butt joint through boss butt joint matching. According to the combined centripetal turbine of the small gas turbine, a segmented combination mode is adopted, and materials of the two turbine sections can be flexibly selected according to different working temperatures of the left high-temperature air inlet section and the right low-temperature air outlet section, so that th