Centrifugal fluid equipment and centrifugal impeller used by centrifugal fluid equipment

Abstract

A centrifugal fluid device and the impeller used therein, the impeller includes a plurality of blades, the blades are backward-curved blades, the starting ends of some or all of the blades are located on a circle with the impeller shaft as the axis and a diameter of D1 , the ends of all the blades are located on a circle with the impeller shaft as the axis and a diameter of D2, wherein, the D1 / D2=0.5~0.6; the inlet angle of the inner flow channel of each blade is formed at the beginning of each blade , the inlet angle is the angle between the outer extension line of the blade passing the starting end and the radius of the circle with a diameter D1 passing the starting end, and the value of the inlet angle is 60° to 80°; each of the blades The outlet angle of the inner flow channel of the blade is formed at the end, and the outlet angle is the angle between the outer extension line of the blade passing through the end and the tangent line of a circle with a diameter of D2 passing through the end and following the direction of impeller rotation. The value is from 165° to 175°. The invention can effectively improve the diffusion effect and efficiency of the centrifugal fluid equipment.

Description

【Technical field】 [0001] The present invention relates to the improvement of centrifugal fluid equipment such as ventilator, blower, especially relates to the improvement of impeller and casing used in centrifugal fluid equipment. 【Background technique】 [0002] see figure 1 and figure 2 Shown, be existing a kind of centrifugal fan. The centrifugal fan adopts a centrifugal impeller with straight blades. Since the centrifugal impeller with straight blades cannot guide and diffuse the wind well, the diffusion effect and efficiency of the fan are not ideal. [0003] Therefore, it is necessary to improve the existing centrifugal fan and the centrifugal impeller used to improve its diffusion effect and efficiency. 【Content of invention】 [0004] The object of the present invention is to provide a centrifugal fluid device with improved diffusion effect and efficiency. To this end, the centrifugal fluid equipment provided by the present invention includes a casing and an imp...

AI Technical Summary

Problems solved by technology

The centrifugal fan adopts a centrifugal impeller with straight blades. Since the centrifugal impeller with straight blades cannot guide and diffuse the wind well, the diffusion effect and efficiency of the fan are not ideal.

Images