| 摘要 |
FIELD: mechanical engineering. ^ SUBSTANCE: invention relates to centrifugal pump impellers. Impeller contains driving disk 1, cover disk 2 and located between them blades 3. Cover disk 2 is outfitted by additional sealing in the form of collar 4. Collar 4 is concentric to inner collar of main sealing 5. Additional collar 4 with main sealing 5 form discharging chamber 6. Relation of external diametre D1 of additional sealing - collar 4 to external diametre D0 of inner collar of main sealing 5 is equal 1.11.3. Distance L from butt of collar 4 up to input butt of impeller is (0.060.07)D0. Depth l of chamber 6 is (0.0450.065)D0. ^ EFFECT: invention provides efficiency increasing of sealing and improving of hydrodynamic properties of impeller. ^ 3 cl, 1 dwg |
