Runner used for direct connection low-speed small-scale mixed-flow turbine of hydrodynamic energy-saving cooling tower

Abstract

A runner used for a direct connection low-speed small-scale mixed-flow turbine of a hydrodynamic energy-saving cooling tower, comprising an upper canopy (1), a runner band (3) and a curved vane (2) arranged between the upper canopy (1) and the runner band (3). The runner is characterized in that the ratio between the height h of a leading edge (4) of the vane (2) and the diameter D1 corresponding to the leading edge (4) is 0.18-0.22; the ratio between the total height H of the vane (2) and the diameter D1 is 0.35-0.42; the ratio between the diameter D2 and the diameter D1 is 0.4-0.6 and wherein the diameter D2 corresponds to the intersection A of the leading edge (4) and runner band (3); the ratio between the diameter D3 and the diameter D1 is 0.3-0.45, wherein the diameter D3 corresponds to the intersection B of the leading edge (4) and the upper canopy; the ratio between the diameter D4 of a draining round platform at the upper canopy (1) and the diameter D1 is 0.1-0.2, the relation between the diameter D1 and the rotating speed of a cooling fan blade is D1=n11*square root of H / n. The invention has the advantages of simple structure, convenient design and installation and high energy conversion efficiency.

Description

technical field [0001] The invention relates to a cooling tower, in particular to a cooling tower driving a runner of a water turbine, specifically a cooling tower without a reduction box. By rationally designing the runner of the water turbine, the output speed of the water turbine is equal to the rated value of the fan speed, thereby saving The runner used for the direct-connected low-speed small Francis turbine of the hydrodynamic energy-saving cooling tower without the reduction box used by the traditional reaction turbine. Background technique [0002] As we all know, in order to achieve the purpose of energy saving, the existing air-conditioning cooling towers have begun to use water turbines to drive the cooling fans. It makes full use of the energy of the cooling tower circulating water flow and converts it into the driving force of the water turbine. The rotating mechanical energy is used to drive the cooling fan, which saves the traditional high-power cooling motor...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to design a hydrodynamic energy-saving cooling tower for the problems that the output shaft of the existing cooling tower water turbine needs to pass through the reduction box to drive the fan blades, resulting in high noise, easy failure and high manufacturing cost. Directly connected to the runner of the low-speed small Francis turbine, thus laying the foundation for the final elimination of the gear reduction transmission mechanism

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