| 摘要 |
<p>An impeller is actuated by the fluid flow to rotate the nozzle and thus rotate the spray fluid. A transmission is between the impeller and the nozzle for transmitting rotation of the impeller to the nozzle. Means are provided for regulating the rate of rotation of the impeller, and then the nozzle, under varying volume flow of fluid being sprayed there out. This may be accomplished by a constant velocity of incoming fluid impinging on impeller blades. This velocity resistance valve in association with a stationary stator having blades thereon which valve moves with respect to the stator to provide a guided substantially constant velocity of jets of fluid on the impeller blades to rotate the same which in turn rotates the nozzle at a constant rate of rotation.</p> |
