| 摘要 |
PURPOSE:To improve the torque ratio and efficiency by making the radius ratio of the circular arc which constitutes a torus to 2 or less and keeping the fluid pressure balance. CONSTITUTION:Each ratio (B/C), (B/A), (C/A) of the radius of each circular arc A-C which constitutes the outer part 10a of a torus 10 is made nearly 2 at most. Though fluid circulates in the torus 10, the fluid close to the outer contour 10a and the inner contour 10b of the torus smoothly flows along the small circular arc at the inflection point, and flows stably free from the deflection of the average stream line in the torus 10 as a whole. Therefore, the output torque is increased, and the torque ratio in stall is increased, and the fluid pressure balance is maintained, and the torque ratio and efficiency are improved.
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