Abstract: The invention relates to a screw pump (1), in particular a double screw pump, s comprising a multiple-piece housing (2, 7, 15, 21) and at least two coupled rotors (3, 3a) which form chambers with in each case at least one thread-shaped profile (4, 4a) which is configured at least in regions with helical channels (5, 5a) and with dividing walls (6, 6a) which delimit the channels (5, 5a), wherein the rotors (3, 3a) perform an opposed rotor rotation, and the dividing walls (6, 6a) engage into one another in a gearwheel-like manner, a running housing part (7), wherein the running housing part (7) encloses the rotors (3, 3a) without contact, wherein the rotors (3, 3a) form, with the running housing part (7), at least one conveying chamber (8, 8a) for the fluid to be conveyed, wherein the conveying chamber (8, 8a) migrates axially along the rotor axis (10, 10a) and conveys the fluid from a suction chamber (11) into a pressure chamber (12), a suction-side connector element (13) which is connected fluidically to the

Abstract: A method for producing a can formed from a can part and a flange part is provided, the flange part being formed as an annular body and, on a side oriented inward toward an axis of symmetry of the annular body, an interface forming a bearing for the can part. A base and a lateral wall are formed on the can part, and the can part is deep drawn and made into a target geometry with a defined wall thickness by virtue of the lateral wall being flow formed. The lateral wall has a formed interface with a material thickness greater than the wall thickness of the lateral wall, and the flange part is connected to the can part at the interface.

Abstract: The invention relates to a magnetically-driven pump (1) with a pump housing (3), a housing cover (4) which closes the pump housing (3), and a containment can (5) which has a metal inner shell (6) and a ceramic outer shell (7) on which a flange (8) is formed. The object of the invention is to devise a pump which is improved in comparison with the prior art, which offers a simple and safe structure and makes uncomplicated and rapid manufacture, assembly and maintenance possible. In particular, a safe and energy-efficient pump is to be devised. To this end, the invention proposes that the inner shell (6) be welded to the housing cover (4) and the outer shell (7) be braced against the housing cover (4) by way of a clamping ring (9) on the flange (8).

Abstract: The invention relates to a magnetic drive pump (10), comprising: a housing (12) filled at least partially with a conveyed fluid; an impeller chamber (14) enclosed by the housing (12); a pump shaft (22); an impeller (24) which is arranged in the impeller chamber (14) and on the pump shaft (22); a bearing (26) which supports the pump shaft (22) in the housing (12); a can (18) which encloses a coupling chamber (20); a rotor (50) which is arranged in the coupling chamber (20) on the pump shaft (22); a ring (16) held in the housing, which supports the bearing (26) and separates the impeller chamber (14) from the coupling chamber (20); a duct (28) formed in the ring (16) for conveying a partial flow of the conveyed fluid out of the impeller chamber (14) to the bearing (26) for the purpose of lubricating the bearing (26), wherein at least part of the conveyed fluid emerging from the bearing (26) arrives in the coupling chamber (20).

Abstract: The invention relates to a screw pump (1), in particular a double screw pump, s comprising a multiple-piece housing (2, 7, 15, 21) and at least two coupled rotors (3, 3a) which form chambers with in each case at least one thread-shaped profile (4, 4a) which is configured at least in regions with helical channels (5, 5a) and with dividing walls (6, 6a) which delimit the channels (5, 5a), wherein the rotors (3, 3a) perform an opposed rotor rotation, and the dividing walls (6, 6a) engage into one another in a gearwheel-like manner, a running housing part (7), wherein the running housing part (7) encloses the rotors (3, 3a) without contact, wherein the rotors (3, 3a) form, with the running housing part (7), at least one conveying chamber (8, 8a) for the fluid to be conveyed, wherein the conveying chamber (8, 8a) migrates axially along the rotor axis (10, 10a) and conveys the fluid from a suction chamber (11) into a pressure chamber (12), a suction-side connector element (13) which is connected fluidically to the

Abstract: The invention relates to a magnetic drive pump (10), comprising: a housing (12) filled at least partially with a conveyed fluid; an impeller chamber (14) enclosed by the housing (12); a pump shaft (22); an impeller (24) which is arranged in the impeller chamber (14) and on the pump shaft (22); a bearing (26) which supports the pump shaft (22) in the housing (12); a can (18) which encloses a coupling chamber (20); a rotor (50) which is arranged in the coupling chamber (20) on the pump shaft (22); a ring (16) held in the housing, which supports the bearing (26) and separates the impeller chamber (14) from the coupling chamber (20); a duct (28) formed in the ring (16) for conveying a partial flow of the conveyed fluid out of the impeller chamber (14) to the bearing (26) for the purpose of lubricating the bearing (26), wherein at least part of the conveyed fluid emerging from the bearing (26) arrives in the coupling chamber (20).

Abstract: Magnetically coupled pumps use cans which have a side wall arranged in a gap between a driver and a rotor of the pump. With a view to good efficiency of the pump, the gap should be as narrow as possible, which can only be achieved with a side wall of a thin wall thickness. In this case, the can must be of a sufficiently great strength, in particular to withstand the differences in pressure in the pump. At the same time, it must be possible for the can to be shaped into a desired geometry in a simple way and to have a high degree of dimensional stability, even under high pump pressures. It is proposed to make a can (1) with a side wall (3) that consists at least partially of a material with a nickel component, wherein the material is a nickel—chromium alloy comprising at least 50 percent by weight of nickel and 17 to 21 percent by weight of chromium, and to harden the side wall (3) by a heat treatment.

Abstract: Magnetically coupled pumps use cans which have a side wall arranged in a gap between a driver and a rotor of the pump. With a view to good efficiency of the pump, the gap should be as narrow as possible, which can only be achieved with a side wall of a thin wall thickness. In this case, the can must be of a sufficiently great strength, in particular to withstand the differences in pressure in the pump. At the same time, it must be possible for the can to be shaped into a desired geometry in a simple way and to have a high degree of dimensional stability, even under high pump pressures. It is proposed to make a can (1) with a side wall (3) that consists at least partially of a material with a nickel component, wherein the material is a nickel-chromium alloy comprising at least 50 percent by weight of nickel and 17 to 21 percent by weight of chromium, and to harden the side wall (3) by a heat treatment.

Abstract: Magnetically coupled pumps use cans which have a side wall arranged in a gap between a driver and a rotor of the pump. With a view to good efficiency of the pump, the gap should be as narrow as possible, which can only be achieved with a side wall of a thin wall thickness. In this case, the can must be of a sufficiently great strength, in particular to withstand the differences in pressure in the pump. At the same time, it must be possible for the can to be shaped into a desired geometry in a simple way and to have a high degree of dimensional stability, even under high pump pressures. It is proposed to make a can (1) with a side wall (3) that consists at least partially of a material with a nickel component, wherein the material is a nickel—chromium alloy comprising at least 50 percent by weight of nickel and 17 to 21 percent by weight of chromium, and to harden the side wall (3) by a heat treatment.

Abstract: The invention relates to a screw spindle pump, with a housing (2) which surrounds a delivery chamber (5), two spindles (7, 8), namely a drive spindle (7) and an opposed running spindle (8), a housing insert (6) which is arranged in the housing (2) and in which the spindles (7, 8) are accommodated, at least one bearing element (13?, 13?), which is connected to the housing insert (6) and on which bearings (12) of the spindles (7, 8) are arranged, and with at least one housing cover (14?, 14?), closing a housing opening. It is the object of the invention to provide a screw spindle pump at which maintenance and inspection work can be carried out more simply and cost-effectively. The invention achieves this object in that the bearing element (13?, 13?) together with the housing insert (6) and the spindles (7, 8) accommodated therein forms a unit (15) which, after the housing cover (14?, 14?) is taken off, is removable from the housing (2) through the housing opening.

Abstract: The invention relates to a screw spindle pump, with a housing (2) which surrounds a delivery chamber (5), two spindles (7, 8), namely a drive spindle (7) and an opposed running spindle (8), a housing insert (6) which is arranged in the housing (2) and in which the spindles (7, 8) are accommodated, at least one bearing element (13?, 13?), which is connected to the housing insert (6) and on which bearings (12) of the spindles (7, 8) are arranged, and with at least one housing cover (14?, 14?), closing a housing opening. It is the object of the invention to provide a screw spindle pump at which maintenance and inspection work can be carried out more simply and cost-effectively. The invention achieves this object in that the bearing element (13?, 13?) together with the housing insert (6) and the spindles (7, 8) accommodated therein forms a unit (15) which, after the housing cover (14?, 14?) is taken off, is removable from the housing (2) through the housing opening.

Abstract: The invention relates to a method for producing a can (1) which is formed from a can section (10) and a flange section (20), a base (13) and a lateral wall (11) being designed on said can section (10), and said can section (10) being deep drawn and brought to a target geometry with a defined wall thickness by means of flow-running said lateral wall (11). The invention suggests that, on said lateral wall (11), an interface (12) is formed with a material thickness greater than the wall thickness of the lateral wall (11), the flange section (20) being able to be connected to the can section (10) at this interface (12), said can section (10) being connected to the flange section (20) by a sealing seam (30), and a force which acts upon the can section (10) in the direction of the can section (10) base (13) being transmittable not across said sealing seam (30) but rather across a form-fitting connection which is formed by the interface, from said can section (10) to the flange section (20).

Abstract: Magnetically coupled pumps use cans which have a side wall arranged in a gap between a driver and a rotor of the pump. With a view to good efficiency of the pump, the gap should be as narrow as possible, which can only be achieved with a side wall of a thin wall thickness. In this case, the can must be of a sufficiently great strength, in particular to withstand the differences in pressure in the pump. At the same time, it must be possible for the can to be shaped into a desired geometry in a simple way and to have a high degree of dimensional stability, even under high pump pressures. It is proposed to make a can (1) with a side wall (3) that consists at least partially of a material with a nickel component, wherein the material is a nickel-chromium alloy comprising at least 50 percent by weight of nickel and 17 to 21 percent by weight of chromium, and to harden the side wall (3) by a heat treatment.