PUMP HOUSING MADE FROM AT LEAST THREE DIFFERENT SINTERABLE MATERIALS

• US 20170102001A1
• Filed: 03/23/2015
• Published: 04/13/2017
• Est. Priority Date: 03/24/2014
• Status: Active Grant

• Current Assignee: Heraeus Deutschland GmbH & Co. KG (Heraeus Holding GMBH)
• Original Assignee: Heraeus Deutschland GmbH & Co. KG (Heraeus Holding GMBH)
• Inventors: SCHIBLI, Stefan, GEBERT, Jrg-Martin, HAUSCH, Ulrich, KEITEL, Oliver
• Granted Patent: US 10,655,631 B2
• Time in Patent Office: Days
• CPC Class Codes: B28B 1/14 by simple casting, the material being neither forcibly fed nor positively compacted for molten material B28B1/54
• CPC Class Codes: B28B 1/16 for producing layered articles coating B28B11/04
• CPC Class Codes: F04D 13/064 Details of the magnetic circuit
• CPC Class Codes: F04D 29/026 especially adapted for liquid pumps
• CPC Class Codes: F04D 29/181 Axial flow rotors F04D29/185 take precedence
• CPC Class Codes: F04D 29/522 especially adapted for elastic fluid pumps
• CPC Class Codes: F04D 29/528 especially adapted for liquid pumps
• CPC Class Codes: F04D 29/648 especially adapted for liquid pumps
• CPC Class Codes: F05D 2230/20 essentially without removing material
• CPC Class Codes: F05D 2230/40 Heat treatment
• CPC Class Codes: F05D 2300/10 Metals, alloys or intermetallic compounds
• CPC Class Codes: F05D 2300/17 Alloys
• CPC Class Codes: F05D 2300/20 Oxide or non-oxide ceramics
• CPC Class Codes: F05D 2300/507 Magnetic properties

Abstract

One embodiment relates to a pump device with an impeller; a pump housing, including a wall surrounding an interior having an inlet and an outlet. The impeller is provided in the interior of the pump housing. The pump housing includes at least one first part-region, at least two further part-regions and at least one third part-region. The at least one first part-region includes, to an extent of at least 60% by weight, based on the total weight of the first part-region, at least one nonmagnetic material, wherein the at least two further part-regions comprise, to an extent of at least 25% by weight, based on the total weight of the further part-region, at least one ferromagnetic material metal, wherein the at least one third part-region comprises a metal content in a range from 40% to 90% by weight, based on the total weight of the third part-region.

Claims

1-28. -28. (canceled)

29. A pump device comprising:

an impeller;

a pump housing comprising a wall surrounding an interior having an inlet and an outlet;

wherein the impeller is provided in the interior of the pump housing;

wherein the pump housing comprises at least one first part-region, at least two further part-regions and at least one third part-region;

wherein the at least one first part-region comprises, to an extent of at least 60% by weight, based on the total weight of the first part-region, at least one nonmagnetic material,

wherein the at least two further part-regions each comprise, to an extent of at least 25% by weight, based on the total weight of the respective further part-region, at least one ferromagnetic material;

wherein the at least one third part-region comprises a metal content in a range from 40% to 90% by weight, based on the total weight of the third part-region;

wherein the wall of the pump housing, in at least one plane (Q) perpendicular to the longitudinal extent of the pump housing, has at least one first part-region and at least two further part-regions; and

wherein the at least one first part-region and at least one of the at least two further part-regions are cohesively bonded to one another.

30. The pump device as claimed in claim 29, wherein the at least one third part-region comprises, to an extent of at least 60% by weight, based on the total weight of the third part-region, at least one nonmagnetic material.

31. The pump device of claim 29, wherein the pump housing comprises a tube.

32. The pump device of claim 29, wherein at least one third part-region is provided at the inlet or the outlet, or wherein one third part-region each is provided at the inlet and the outlet.

33. The pump device of claim 29, wherein the at least two further part-regions each comprise at least one first sub-region and each comprise a second sub-region, wherein the at least one first sub-region comprises more ferromagnetic material than the at least one second sub-region.

34. The pump device of claim 33, wherein the at least one first sub-region and the at least one second sub-region are configured in the form of a layer.

35. The pump device of claim 29, wherein the pump housing has a volume in a range from 0.1 cm³ to 10 cm³.

36. The pump device of claim 29, wherein at least part of every further part-region is surrounded by at least one electrical coil each.

37. The pump device of claim 29, wherein the nonmagnetic material of the at least one first part-region or the at least one third part-region is selected from the group consisting of a cermet, aluminum oxide (Al₂O₃), zirconium dioxide (ZrO₂), a zirconium oxide containing an aluminum oxide (ATZ), an aluminum oxide containing a zirconium oxide (ZTA), an yttrium-containing zirconium oxide (Y-TZP), aluminum nitride (AlN), magnesium oxide (MgO), a piezoceramic, barium (Zr, Ti) oxide, barium (Ce, Ti) oxide and sodium potassium niobate, a platinum alloy, a palladium alloy, a titanium alloy, a niobium alloy, a tantalum alloy, a molybdenum alloy, a stainless steel (AISI 304, AISI 316 L) or a mixture of at least two of these.

38. The pump device of claim 29, wherein the at least one first part-region comprises a nonmagnetic metal in a range from 40% to 90% by weight, based on the total weight of the at least one first part-region.

39. The pump device of claim 29, wherein the ferromagnetic material of at least one of the at least two further part-regions is selected from the group consisting of iron, (Fe), cobalt (Co), nickel (Ni), chromium dioxide (CrO₂), ferrite (Fe₂O₃), an iron alloy, an iron-nickel alloy, an iron-silicon alloy, an iron-cobalt alloy, a nickel alloy, an aluminum-nickel alloy, a cobalt alloy, a cobalt-platinum alloy, a cobalt-chromium alloy, a neodymium-iron-boron alloy, a samarium-cobalt alloy or a mixture of at least two of these.

40. The pump device of claim 29, wherein at least one of the at least two further part-regions further comprises a component selected from a ceramic, or a further metal or a mixture of these.

41. The pump device of claim 40, wherein the further metal in at least one of the at least two further part-regions is selected from the group consisting of platinum (Pt), palladium (Pd), iridium (Ir), niobium (Nb), molybdenum (Mo), tungsten (W), titanium (Ti), chromium (Cr), a cobalt-chromium alloy, tantalum (Ta) and zirconium (Zr) or a mixture of at least two of these.

42. The pump device of claim 29, wherein the at least one first part-region comprises less than 10% by weight, based on the total weight of the first part-region, of metal.

43. The pump device of claim 29, wherein the at least one first part-region and/or at least one of the at least two further part-regions is cohesively bonded to at least one third part-region.

44. The pump device of claim 29, wherein the pump device is at least partly surrounded by a component housing, wherein at least part of the at least one third part-region of the pump device is bonded to the component housing.

45. The pump device of claim 44, wherein the component housing comprises at least 30% by weight, based on the total weight of the component housing, of titanium.

46. The pump device of claim 29, wherein the wall of the pump housing has a magnetic permeability of less than 2μ

.

47. The pump device of claim 29, wherein a surface of the wall facing the interior of the pump housing has a Vickers hardness of at least 330 HV, preferably at least 350 HV, preferably at least 370 HV.

48. The pump device of claim 29, wherein a surface of the wall facing the interior of the pump housing has a Vickers hardness at least 20 HV higher than the surface of the impeller pointing towards the interior of the pump housing.

49. The pump device of claim 29, wherein at least the outer surfaces of the component housing and the surface facing the interior of the pump housing are biocompatible.

50. A method for producing a pump housing for a pump device comprising:

providing a first material;

providing a further material;

providing a third material;

forming a pump housing precursor, wherein a first part-region of the pump housing is formed from the first material and wherein at least two further part-regions of the pump housing are formed from the further material and wherein at least one third part-region of the pump housing is formed from the third material; and

treating the pump housing precursor at a temperature of at least 300°

C.

51. The method of claim 50, wherein forming a pump housing precursor comprises a shaping process selected from the group consisting of a lithographic process, an injection molding, a machining, an extrusion or a combination of at least two of these.

52. A pump housing for a pump device, obtainable by the method of claim 50.

53. A housing comprising a wall surrounding an interior, wherein the housing has an inlet and an outlet, wherein the housing has at least one first part-region, at least two further part-regions and at least one third part-region;

wherein the wall of the housing, in at least one plane (Q) perpendicular to the longitudinal extent of the housing, has at least one first part-region and at least one further part-region;

wherein the at least one first part-region comprises, to an extent of at least 60% by weight, based on the total weight of the at least one first part-region, at least one nonmagnetic material,

wherein the at least two further part-regions comprise, to an extent of at least 25% by weight, based on the total weight of the at least two further part-regions, at least one ferromagnetic material,

wherein the at least one third part-region comprises a metal content in a range from 40% to 90% by weight, based on the total weight of the third part-region,

wherein the at least one first part-region and at least one of the at least two further part-regions are cohesively bonded to one another.

54. The housing of claim 53, wherein the at least one first part-region and/or at least one of the at least two further part-regions is cohesively bonded to at least one third part-region.

55. The housing of claim 53, wherein a shiftable element is provided in the housing, at least in part of the housing.

56. The housing of claim 53 configured within a pump device.