Energy-saving type straight wall front and back disc variable camber curve element ternary impeller and centrifugal draught fan with impeller

Abstract

The invention discloses an energy-saving type straight wall front and back disc variable camber curve element ternary impeller. The impeller comprises a front disc, blades, a rear disc and a shaft disc, the front disc and the rear disc are both of straight wall structures, blades are variable camber curve element ternary twisted blades, that is, the front disc and the rear disc of the draught fan impeller are both of traditional draught fan straight wall structures, original binary blades are replaced with variable camber curve element ternary blades, through adjusting of the curvature of the blades in the impeller inlet blade height direction, when the impeller rotates, blade force exerted to the airflow by the blades can properly balance centrifugal inertia force during converting the axial direction of the air flow into the radial direction, and therefore severe changes of the speed of the air flow on an inlet are weakened. A centrifugal draught fan with the ternary impeller is further protected, through the blade force of the variable camber curve element ternary impeller, the side effect of small-radius turning inertia force can be overcome, the straight wall front and rear disc traditional structure is adopted, the straight wall front and back disc variable camber curve element ternary impeller is designed, and the energy-saving effect of the ternary impeller of the draught fan is achieved.

Description

technical field [0001] The invention belongs to the technical field of radial and mixed-flow turbomachinery, and relates to equipment such as centrifugal fans, blowers, and compressors, and in particular to an energy-saving straight-wall front and rear plate variable-curvature curve element ternary impeller and a ternary impeller using the impeller. Centrifugal fans (ventilators, blowers, compressors). Background technique [0002] Since my country's Professor Wu Zhonghua published the "Universal Theory of Subsonic and Supersonic Three-dimensional Flow of Axial Flow, Radial Flow and Mixed Flow Turbomachinery" in the United States in the 1950s, with the rapid development of computer technology, three Meta-flow turbomachinery has been widely used. At present, the linear element ternary impeller of NREC of the United States is widely used in the field of radial and mixed turbine machinery at home and abroad, mainly including front disc 1, blade 2, rear disc 3, volute 4, suction...

AI Technical Summary

Problems solved by technology

This straight-wall front and rear disc structure greatly limits the application of linear element ternary impellers in the field of low-end fans. Only traditional binary blades with curved blades in the flow direction and non-twisted height directions can be used ( Figure 4 )

Due to the large volume and wide range of such low-end fans, it has caused a lot of energy waste in the country

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