PURPOSE:To simplify the structure of a bubble water-wheel generator and to reduce the weight of the generator by supporting both axial end faces of an inner body by a frame plate of circular plate shape to the inner periphery of an outer body and reinforcing both axial ends of the outer body by a radial reinforcing machine. CONSTITUTION:Circumferential frame plates 17, 17' are formed of only two sheets for supporting a stator core 11, and an outer body 2 and an inner body 9 are supported by a longitudinal rib 18. After completing the installation, torque can be sufficiently transmitted only by the outer body as a rigid body and a longitudinal rib 18 for coupling the inner body 9 containing the core 11 to the outer body 2 in a rotation direction, and the both ends of the body 2 are supported by a top cover 3 and a water-wheel casing as rigid body, thereby eliminating the obstruction in the operation. However, before the installation, it is weak in a radial direction. Accordingly, a reinforcing material 12 is mounted on both axial ends of the body 1 so as to maintain the bodies 2, 9 and the core 11 in a roundness.
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