| 摘要 |
FIELD: engines and pumps. ^ SUBSTANCE: invention relates to pump production and can be used for pumping various fluids. The proposed pump comprises impeller with hub fitted on the shaft and auger. The hollow shaft houses additional shaft with its one extension accommodating the auger. There is a hydraulic turbine wheel rotor representing an auger fitted inside the additional shaft. There is a channel inside the additional shaft to return the product pumped over from the turbine to the pump inlet. Hydraulic turbine nozzle box is arranged inside the shaft on the tapered ledge made along the shaft axis. At least, one intermediate bearing is fitted between the shaft and additional shaft and can represent a magnetic bearing. ^ EFFECT: improved cavitation properties, higher efficiency. ^ 3 cl, 2 dwg |
