| CPC F04D 29/245 (2013.01) [F04D 29/242 (2013.01)] | 2 Claims |
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1. An impeller in a pump configured to flow a fluid from an inlet to an outlet, the impeller comprising:
a hub; and
a vane unit provided radially at a position spaced apart by a predetermined distance based on the hub to induce the suction of a fluid and discharge thereof, wherein the vane unit is configured to begin at a position spaced apart by a predetermined radius based on the hub and to end to be formed into a streamlined shape in which a beginning portion becomes narrower in width than an end portion from the beginning portion toward the end portion, and wherein the vane unit is configured to form an inlet side for sucking the fluid at a position adjacent to the hub and an outlet side for discharging the suctioned fluid,
wherein the vane unit includes:
first vanes having a structure configured to increase the size of the inlet, the first vanes being radially configured at positions spaced apart by a radius r1 based on the hub and having “n” vanes of a first length, where “n” is a natural number equal to or greater than 3; and
“n” second vanes disposed between the first vanes, the second vanes having a second length that is less than the first length and having a radius r2 that is greater than the radius r1 by a predetermined value,
wherein each of the n first and second vanes includes:
a streamlined surface of a streamed shape formed such that a surface facing an inner side based on the hub supports the smooth flow of the fluid; and
an inclined surface of an oblique shape formed such that a surface facing an outer side based on the hub provides a supporting force for the flow of the fluid,
wherein the number of each of the first and second vanes is three, and the second vanes have a length that is 3-10% smaller than the first length of the first vanes, and
an initial width L1 and a final width L2 of the first and second vanes are formed in a 1:0.3 to 0.6 length ratio, wherein the initial width L1 denotes a width formed by the beginning portion of the first and second vanes located on the inlet side and the final width L2 denotes a width formed by the end portion of the first and second vanes located on the outlet side.
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