| 摘要 |
FIELD: engines and pumps. ^ SUBSTANCE: jet device contains housing with mixing chamber and supply connection pipes of active and passive media, diffuser, and nozzle arranged in the housing with inner cone section facing the mixing chamber. Casing is installed and fixed in the nozzle and rack-and-pinion linkage is arranged in casing; rack-and-pinion linkage consists of roller with teeth and toothed rack with active medium flow control fixed on its end, facing the mixing chamber and made in the form of throttle needle which is located coaxially to the nozzle. Impeller is fixed on the casing on the mixing chamber side. Impeller consists of two coaxial cylinders of large and small diametres respectively, and blades located radially between cylinders and curved in the direction of active medium flow. Blades provide swirling of active medium at its flowing through opening formed with those blades, inner surface of cylinder of larger diametre and outer surface of cylinder of smaller diametre. Turbine impeller can have the areas of openings decreasing in direction of the mixing chamber. ^ EFFECT: decreasing energy losses. ^ 2 cl, 2 dwg |
