초록 ▼

In a turbo, pump according to the present invention, blades 3e and a shroud 3f are continuously formed with a boss 3c of a turbine wheel 3, a meridian plane configuration of the shroud 3f is formed as an concave arcing rotatable surface. A boss shroud 3f1 is formed substantially parallel to the axis

In a turbo, pump according to the present invention, blades 3e and a shroud 3f are continuously formed with a boss 3c of a turbine wheel 3, a meridian plane configuration of the shroud 3f is formed as an concave arcing rotatable surface. A boss shroud 3f1 is formed substantially parallel to the axis of rotation O. A portion 3e2 of a blade outlet edge 3e1 is smoothly continuous to the boss shroud 3f1 and largely projects downstream. A portion 3e3 of the blade outlet edge 3e1 is formed substantially perpendicular to the axis of rotation O. The blade outlet edge 3e1 is formed with a smooth arc-like curve projecting convexly downstream between the portion 3e3 and the portion 3e2. An angle of the blade outlet edge 3e1 is set to an angle of substantially 0°at the portion 3e2 of the blade outlet edge 3e1 and to substantially the conventional degree of angle at the portion 3e3 of the blade outlet edge 3e1. Further, the blade inlet 3a and the blade outlet 3b are connected there between by a curve.

대표청구항 ▼

A turbo pump comprising a pump impeller rotatably disposed in the pump casing for rotation, to carry carried fluid which is any one of liquid, gas, and an intermediate comprising a two-phase fluid mixture of liquid and gas, a turbine wheel rotatably disposed in a turbine casing coaxially with said p

A turbo pump comprising a pump impeller rotatably disposed in the pump casing for rotation, to carry carried fluid which is any one of liquid, gas, and an intermediate comprising a two-phase fluid mixture of liquid and gas, a turbine wheel rotatably disposed in a turbine casing coaxially with said pump impeller and being rotated by working fluid which is any one of liquid, gas, and an intermediate comprising a two-phase fluid mixture of liquid and gas, said pump impeller being rotated by the rotating the turbine wheel, wherein said pump impeller comprises a shroud continuously formed with a boss into which a rotor shaft fits and blades each having a blade inlet, said shroud having a concave arcing rotatable surface formed in a meridian plane configuration and a boss shroud formed in a cylindrical configuration substantially parallel to said rotor shaft, an edge of said blade inlet being fixed to said boss shroud to be smoothly continuous from a surface of said boss shroud to the upstream side and largely projecting upstream, said edge of said blade inlet having a portion attached to said cylindrical boss shroud and a portion near said pump casing, said portion near said pump casing extending substantially perpendicular to said rotor shaft, said portion attached to said boss shroud and said portion near said pump casing being connected therebetween by a smooth arc-like curve projecting convexly upstream to thereby form the edge of said blade inlet, and angle of said blade inlet being set to an angle of substantially 0°to the direction of its tangent at said portion of said edge near said boss shroud and increasing continuously from said portion of said edge near said boss shroud to said portion of said edge near the casing, said angle of the blade inlet being varied smoothly between said portion near said boss shroud and said portion near said casing to thereby form said blade inlet, and said blade inlet being connected to the end of the blade outlet with a smooth curved surface to thereby form each of said blades; and said turbine wheel comprises a shroud continuously formed with a boss into which said rotor shaft fits and blades each having a blade outlet, said shroud having a concave arcing rotatable surface formed in a meridian plane configuration and a boss shroud formed in a cylindrical configuration substantially parallel to said rotor shaft, an edge of said blade outlet being fixed to said boss shroud to be smoothly continuous from a surface of said boss shroud to the downstream side and largely projecting downstream, said edge of said blade outlet having a portion attached to said cylindrical boss shroud and a portion near said turbine casing, said portion near said turbine casing extending substantially perpendicular to said rotor shaft, said portion attached to said boss shroud and said portion near said turbine casing being connected therebetween by a smooth arc-like curve projecting convexly downstream to thereby form the edge of said blade outlet, an angle of said blade outlet being set to an angle of substantially 0°to the direction of its tangent at said portion of said edge near said boss shroud and increasing continuously from said portion of said edge near said boss shroud to said portion of said edge near the casing, said angle of the blade outlet being varied between said portion near said boss shroud and said portion near said casing to thereby form said blade outlet, and said blade outlet being connected to the end of the blade inlet with a smooth curved surface to thereby form each of said blades.