| 摘要 |
<p>A floating device used for supporting a floating part is provided, which comprises two groups of lever sets (2, 3) and two groups of radial pulley blocks. Each group of lever set (2, 3) is equipped with a group of radial pulley block. Each group of lever set (2, 3) comprises at least two levers (202a, 202b, 302a, 302b) sharing a fulcrum shaft (201, 301), and the ends of the two levers (202a, 202b, 302a, 302b) at one side of the fulcrum shaft (201, 301) are provided with a group of radial pulley block. A first guide mechanism that restrains the radial pulley block from moving along the axes of the levers is provided on the ends of the two levers (202a, 202b, 302a, 302b) of each group of lever set (2, 3). A weight equalizer (207, 307) is applied to the other end of the levers, and the fulcrum shaft (201, 301) is fixed on a workbench or a track. The two groups of pulley blocks comprise at least three pulleys (208, 308). Each group of pulley block comprises a pulley supporting mechanism. The pulley supporting mechanism comprises a support main body (203, 303) with a second guide mechanism, a pulley supporting base (208a, 308a) which moves along the second guide mechanism and is used for supporting the pulleys (208, 308), and a first guide rod (204, 304) which is connected with one end of the pulley supporting base (208a, 308a) and moves along the first guide mechanism. An end sealing device of an annular air duct that ensures the end sealing of the annular air duct is also provided.</p> |
