Eccentric screw pump
AssigneeNETZSCH Pumpen & Systeme GmbH
InventorsJosef Hauck, Hisham Kamal, Reinhard Denk
Life of this patent
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Abstract
An eccentric screw pump for pumping fluids or flowing conveying media from a suction side to a pressure side, which includes a rotor and a stator, the stator being flexible and is connected to the pump housing on one side, in particular on the suction side. The rotor is connected to the drive shaft by means of an articulation. When the eccentric screw pump is in the idle state, there is no sealing contact at least in areas between the rotor and the stator in the sealing areas. When the eccentric screw pump is in the operating state, the stator is surrounded, at least in sections and/or, essentially, on the periphery by the conveying medium. The rotor and the stator are brought into contact with each other in the operating state along the sealing area.
Claims19
An eccentric screw pump for pumping a fluid or free-flowing conveying medium from a suction side to a pressure side, the eccentric screw pump comprising:
- a rotor and a stator,
- wherein the stator is designed to be flexible and is secured to a pump housing on a suction side,
- wherein the rotor is connected to a drive shaft via a joint,
- wherein in an idle state of the eccentric screw pump, no sealing contact is formed at least in some areas between the rotor and the stator in sealing areas,
- wherein in an operating state of the eccentric screw pump, the stator is surrounded at least in some areas by the conveying medium,
- wherein the rotor and the stator are brought into contact along the sealing areas in the operating state by the conveying medium exerting pressure from outside the stator on an outer circumferential surface of the stator.
Dependencies are inferred from the claim text.