Direct connection low-speed small-scale mixed-flow turbine seating ring applied in hydrodynamic energy-saving cooling tower

Abstract

A direct connection low-speed small-scale mixed-flow turbine seating ring applied in a hydrodynamic energy-saving cooling tower, mainly comprising an upper ring plate (1), a lower ring plate (3) and a guide vane (2) arranged between the upper ring plate (1) and the lower ring plate (3). The turbine is characterized in that the guide vane (2) is a negative curvature guide vane, the height of the negative curvature guide vane (2) is 0.07-0.09 time of the diameter D1 of a leading edge thereof, the length L is 0.16-0.2 time of the diameter D1 of the leading edge thereof; the diameter D2 of a trailing edge of the negative curvature guide vane (2) is 0.75-0.95 time of the diameter D1 of the leading edge thereof; the diameters D3 of excircles of the upper ring plate (1) and the lower ring plate (3) are both 1.0-1.25 times of the diameter D1 of the leading edge of the negative curvature guide vane (2), the diameters D4 of inner circles of the upper ring plate (1) and the lower ring plate (3) are 0.7-0.9 time of the diameter D1 of the leading edge of the negative curvature guide vane (2). The invention has simple structure and convenient design calculation, and is beneficial to improving the energy conversion efficiency of the turbine.

Description

technical field [0001] The invention relates to a cooling tower, in particular to a cooling tower driven water turbine inlet seat ring, specifically a water inlet seat ring without a reduction box. The seat ring of the direct-connected low-speed small Francis turbine applied to the hydrodynamic energy-saving cooling tower is used for the rated value of the fan speed so as to save 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, and the energy saving effect is very significant. [0003] As far as the applicant knows...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to design a hydrodynamic energy-saving cooling system for the problems that the output shaft of the existing cooling tower impact water turbine needs to pass through the reduction box to drive the fan blades, resulting in high noise, easy failure and high manufacturing cost. The direct-connected low-speed small Francis turbine seat ring of the tower, thus laying the foundation for the final elimination of the gear reduction transmission mechanism

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