| 摘要 |
FIELD: engines and pumps. ^ SUBSTANCE: pump diffuser comprises annular base 1 and set of vanes 2 arranged regularly to form diffuser channels 3 there between. Shape of inner and outer lateral surfaces in cross section over vane height is outlined by eccentric radii Rvane OR Rvane IR, respectively, with centers A and B spaced apart with angular shift Total number, density on base circle and helix angle of vanes 2 are taken to meet the condition whereat angular width of vane projection on arbitrary axial cylindrical diffuser surface is partially overlapped by inlet and outlet sections of similar projections on, at least, two adjacent vanes. ^ EFFECT: simplified design, ease of manufacture, higher pump efficiency. ^ 3 cl, 3 dwg |
