摘要:
The invention relates to a method of and apparatus for agitating and pumping particulate solids which are settled in and beneath a liquid by rotating a vaned impeller which is attached to a pump such that pressure waves are set up in the liquid and the settled solids, the solids being loosened so as to be pumpable, and the agitator being arranged to impart to its surroundings an axial component of movement towards the pump inlet.
摘要:
A booster propeller (15) is located in a flared funnel (28) leading toward inlet apertures (14) in an end plate (13) of a centrifugal pump casing (5). Such propeller has radially projecting blades (16) of generally triangular cross section for propelling slurry toward the apertures. The end plate is recessed into the impeller-receiving bowl (6) of the pump casing. The inner face of the end plate is flush with the adjoining inner face of the peripheral pump outlet conduit (18). The impeller (7) has vanes (10) projecting toward the end plate and having cupped leading surfaces forming a sharpened edge. Such blades are swept back in the area of the end plate inlet apertures for effective slicing of solid material in the slurry in combination with edges of the inlet apertures. The pump bowl has a semicylindrical wall portion closely encircling the impeller before the wall spirals volutely outward to the outlet conduit.
摘要:
A centrifugal pump for very thick and/or viscous materials and products comprises a screw impeller of at least one start, of which the component blade, which is in the form of a helix (8) having a pitch which increases in the material feed direction, has a slightly conical outer profile, is wound on a highly conical core (5) smoothly joined to a base disc (6), and at its downstream terminal portion is twisted towards the core (5) to assume the configuration of a delivery vane (9) forming an acute angle with the disc (6) and disposed a chord thereof, and supporting an overlying circumferential ring (10) which defines a closed delivery duct for the material.
摘要:
Hierbei geht es um die Spülung der Laufradspaltringe bzw. Drosselspalten, welche durch die in der Förderflüssig keit enthaltenen Feststoffe einem erhöhten Verschleiß aus gesetzt sind. Da spezielle Spülpumpen bei den in großen Meerestiefen angeordneten Unterwassermotorpumpen ei nen erheblichen zusätzlichen Aufwand darstellen, wurde eine andere Lösung gefunden. Es werden die zu spülenden Stellen von denjenigen Pumpenstufen, deren Druck kleiner als der äußere hydrostatische Druck ist, direkt mit dem umgebenden Meerwasser gespült.