Water inlet pipeline connecting structure and hydroelectric generating set

The invention relates to the technical field of hydroelectric generating sets, and discloses a water inlet pipeline connecting structure and a hydroelectric generating set. The water inlet pipeline connecting structure comprises a sealing ring, a supporting assembly and a water inlet pipeline used for being communicated with a water conveying pipeline, and the sealing ring comprises a first end, a sealing part and a second end which are coaxially arranged in sequence; the first end portion is arranged in the water inlet pipeline in a penetrating mode and abuts against the inner wall of the water inlet pipeline, the second end portion is arranged in the water conveying pipeline in a penetrating mode and abuts against the inner wall of the water conveying pipeline, and the sealing portion abuts against the water inlet end of the water inlet pipeline and the water outlet end of the water conveying pipeline along the two axial side faces of the sealing portion respectively. The supporting assembly is located on t