Chemical vertical pump with closed impeller and method of transfer of chemically aggressive fluids

FIELD: engines and pumps. SUBSTANCE: proposed pump comprises drive motor, adapter with power coupling and rotary semi-submerged pump. Composite pump housing comprises running section housing with bearings and suspension case attached to thrust plate from below and locked to flow section housing. Said shaft runs in running section housing bearings and while its lower support extends through suspension case and into flow section housing to be rigidly coupled with impeller hub. Rotor shaft top end is fitted in adapter power coupling. Impeller comprises the main and cover discs with s set of curved vanes. Means gradient of vane axis mounting angle and identical gradient of angular configuration of vane channel median axis makes (0…7.0) rad/m over vane length. The impeller main and cover discs are protected by hydraulic locks composed by impeller. Impeller features widened hub with circular channel in hub body exposed from above. EFFECT: simplified design, fabrication and assembly, higher reliability and efficiency. 22 cl, 4 dwg