Screw Pump
AssigneeNETZSCH Pumpen & Systeme GmbH
InventorEduardo Nuss
Life of this patent
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Abstract
a screw pump including a pump housing in which a pump spindle is rotatably mounted with the involvement of a hydrostatic thrust bearing for absorbing the axial thrust which is produced at the spindle during operation, the hydrostatic thrust bearing being formed by a housing-fixed bearing surface, against which an end-face, spindle-fixed bearing surface of the pump spindle is indirectly supported, by virtue of the fact that the housing-fixed bearing surface and the spindle-fixed bearing surface form a bearing gap therebetween, which bearing gap is fed, in its central region, with a pressure fluid which flows out through the bearing gap in the radial direction, preferably into the intake region, and the hydrostatic pressure of which counteracts the axial thrust.
Claims13
A screw pump comprising a pump housing, in which a pump spindle is rotatably mounted with the involvement of a hydrostatic thrust bearing to absorb the axial thrust created during the operation on the spindle, wherein the hydrostatic thrust bearing is formed by a housing-fixed bearing surface, against which an end-face, spindle-fixed bearing surface of the pump spindle is indirectly supported, in that the housing-fixed and the spindle-fixed bearing surface form a bearing gap therebetween, which, in its central region, is fed with a pressure fluid, which flows out through the bearing gap in the radial direction—preferably into the suction region—and the hydrostatic pressure of which counteracts the axial thrust, wherein the pump spindle includes an actuating element, which, as a function of the current axial position of the spindle, mechanically opens or closes a valve, which controls the inflow of pressure fluid into the bearing gap.
Dependencies are inferred from the claim text.