Pump housing made from at least three different sinterable materials

Patent metadata

Field	Value
Publication number	US-2017102001-A1
Application number	US-201515128921-A
Country	US
Kind code	A1
Filing date	Mar 23, 2015
Priority date	Mar 24, 2014
Publication date	Apr 13, 2017
Grant date	—

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.

First claim

1 - 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 cm 3 to 10 cm 3 .

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 (Al 2 O 3 ), zirconium dioxide (ZrO 2 ), 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 (CrO 2 ), ferrite (Fe 2 O 3 ), 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

Assignees

• Heraeus Deutschland Gmbh & Co Kg

Inventors

• Schibli Stefan
• Gebert Jörg-Martin
• Hausch Ulrich
• Keitel Oliver

Classifications

• B28B1/14

  by simple casting, the material being neither forcibly fed nor positively compacted (for molten material B28B1/54) · CPC title

• F05D2300/17

  Alloys · CPC title

• F04D29/026 Primary

  especially adapted for liquid pumps · CPC title

• F05D2230/20

  essentially without removing material · CPC title

• F05D2300/10

  Metals, alloys or intermetallic compounds · CPC title