EP1520992A2 - Diffuseur pour une pompe rotatoire - Google Patents

Diffuseur pour une pompe rotatoire Download PDF

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Publication number
EP1520992A2
EP1520992A2 EP04020975A EP04020975A EP1520992A2 EP 1520992 A2 EP1520992 A2 EP 1520992A2 EP 04020975 A EP04020975 A EP 04020975A EP 04020975 A EP04020975 A EP 04020975A EP 1520992 A2 EP1520992 A2 EP 1520992A2
Authority
EP
European Patent Office
Prior art keywords
blade
centrifugal pump
pump according
edge
stator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04020975A
Other languages
German (de)
English (en)
Other versions
EP1520992A3 (fr
EP1520992B1 (fr
Inventor
Peer Springer
Thomas Pensler
Christoph Jaeger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KSB AG
Original Assignee
KSB AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KSB AG filed Critical KSB AG
Publication of EP1520992A2 publication Critical patent/EP1520992A2/fr
Publication of EP1520992A3 publication Critical patent/EP1520992A3/fr
Application granted granted Critical
Publication of EP1520992B1 publication Critical patent/EP1520992B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
    • F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers

Definitions

  • the invention relates to a centrifugal pump axial or semi-axial design, with a on the pressure side of an impeller located stator whose substantially radially extending Guide vanes with a blade outer edge on a flow-leading Wall are arranged, wherein the inlet edges of the guide vanes in the flow direction are arranged to the impeller axis of rotation to flee and between the blade inner edges the guide vanes a free hub loose passage is formed.
  • the invention is therefore based on the problem, for a generic stator easy to find production possibility.
  • vanes designed as sheet metal parts are, wherein the vane blanks as a development of a conical surface are formed and the shaped vanes cutouts this conical surface are.
  • An embodiment provides that the guide vanes as a settlement of several, tangential are formed adjacent cone surfaces.
  • a single vane as part of one or more conical surfaces results in the settlement an easy to produce sheet metal blank.
  • the curvature or curvature to be attached to it from the flow-carrying Vane surfaces creates a simple forming process over accordingly trained rolling tools or other known forming tools.
  • the formation of the guide vanes as a settlement of one or more conical surfaces results for each finished vane a well-defined position within the Leitradgetude in which they are to be fastened, for example by a welded joint.
  • the invention forms one on a smaller radius the blade arranged side edge of the blade closest to the impeller axis of rotation, free scoop inner edge of the vane and one towards a larger one Radius of the cone arranged blade side edge attached to the stator shell Blade outer edge, wherein the blade outer edge is formed from a Cutting curve of the conical surface with the flow-carrying wall.
  • the vanes are with one in the flow direction and in the direction of impeller axis of rotation provided fleeing arranged blade leading edge.
  • This is an embodiment before that their course is determined from the cutting curve of the blade leading edge a Leitradschaufel with a concentrically arranged about the impeller axis of rotation, cone-shaped or funnel-shaped element and this element has an opening angle up to 130 °.
  • a vane entry angle ⁇ remains decreasing The stator radius equals or becomes smaller. Because the vanes as an ingredient one or more conical surface areas are formed, the additional results Advantage of a over the entire height of the vane approximately constant remaining Guide vane entry angle ⁇ , resulting in a much better Leitradanströmung resulting in an improved energy conversion within the stator.
  • One at the intersection between the blade leading edge and the channel side or freighter Scoop edge located corner is rounded by a transition to favorable To obtain transitions between the adjacent blade edges.
  • Another embodiment provides that of a deformed vane blank with larger area the contour of a smaller vane to be mounted Area is taken. If it is the most suitable forming tools will require a larger, surplus material The vane blank is bent and the formed vane blank becomes a removed to be mounted vane by known means. Likewise a vane immediately as a finished in the outer dimensions guide vane be transformed.
  • the flow-guiding wall of the stator housing is designed as a conical or tubular shaped sheet metal part and that an impeller of axial or semi-axial design arranged in front of or within the stator is.
  • stator shell Within the stator shell are the vanes with their respective interface, the blade outer edge, by suitable methods with the flow-leading Wall connected.
  • Fig. 1 shows a spatial representation during the design phase of a stator.
  • a cylinder 1, the limiting flow-guiding wall 1.1 of a stator 2 is concentrically cut from an imaginary, conical or funnel-shaped Element 3.
  • the element 3 protrudes with its tip 4 into the cylinder 1.
  • the here - for reasons of clarity - not shown axes of Element 3 and cylinder 1 coincide.
  • the imaginary conical or funnel-shaped Element 3 has an opening angle of the order of magnitude of up to 130 ° can accept.
  • the element 3 has a lateral surface 5, which is the basis for a scavenging arranged blade edge 6 of a blade 7 forms.
  • An arrow 8 symbolizes the flow direction through the stator 2.
  • Another imaginary cone element 9 is free standing in the room next to the cylinder 1 shown, wherein the lateral surface of the cone 9 intersects the cylinder 1. Not here shown axes of cone 9 and cylinder 1 are at a distance and at an angle to each other.
  • the flow-guiding surface disposed within the cylinder 1 Guide vane 7 is part of the cylinder 1 cutting lateral surface of the cone 9.
  • the cone 9 is located in the flow direction of the arrow 8 right in addition to the stator 2.
  • the stator 2 has in this embodiment via fasteners 10 and 10.1, with which it is attached to a later installation location and at which a - not shown here - impeller is arranged with a drive.
  • the section line of the cone 9 with the cylinder 1 forms the blade outer edge, with the a vane in the stator 2 is attached to the wall 1.1.
  • This blade edge lies on a larger radius of the conical surface of the cone 9, as the free in the Space standing blade inner edge 12, on a smaller radius of the cone 9 is arranged.
  • the cutting edge of the conical surface of the cone 9 with the lateral surface of the conical or funnel-shaped element 3, the blade inlet edge 6 forms a Guide vane 7.
  • Lines a - b correspond to the cutting lines of the conical surface of the cone 9 with the cylinder 1 and the conical or funnel-shaped element 3 from the illustration of Fig.1.
  • the line a corresponds to those blade outer edge 13, with the one vane 7 in the stator 2 attached to the flow-guiding wall 1.1 is.
  • a line b forms at the intersection of the cone 9 with the element 3, the blade leading edge 6 of a vane 7 from.
  • the line c corresponds to a circular arc on a plane and vertical section to Axis of the cone 9. Their position is determined by a dimension required in the design of the stator free ball passage through the hubless stator determined.
  • the line c corresponds the blade inner edge 12 of a vane. 7
  • a guide vane 7 determining lines a - e a vane can be cut from a sheet metal blank before or after a forming process become.
  • a forming process is done with the help of tapered rollers or other forming techniques performed.
  • Such a vane is welded in a cylindrical stator. This results in a well-defined position between the blade outer edge 13 and the flow-guiding wall 1.1 at the appropriate blunt attachment and thus a simple fast attachment, for example by means of welding technology, is possible.
  • a stator shell 2 is designed diffuser-shaped, would analogous in Fig. 1 instead of a cylinder 1 a corresponding diffuser-shaped Truncated cone or similar component find application.
  • the cutting lines of such diffuser-shaped cylinder replacement with the element 3 and the cone 9 would then the Determine the inside, outside and blade leading edge of the vanes.
  • the generator of such a vane is any line in the space that the Condition meets that it lies on the cone surface to be formed.
  • This line is particularly well recognizable in the area of the trailing edge when the exit angle the vane is at 90 ° or as the trailing edge when the exit angle exactly 90 °.
  • the line d or the blade outlet edge 11 is always vertical on blade inner edge 12.
  • the blade leading edge 6 as a free cut curve, which serves as a generatrix of the conical surface of the first cone 3 is no longer obvious, though, as it is compulsory on the conical surface of which lies, with rotation about the cone axis the same conical surface will generate.
  • the element 3 is a cone educated. If a different course of the blade leading edge 6 is desired, then the element 3 also have a funnel-shaped course, in the mathematical Meaning no cone.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)
EP04020975A 2003-10-04 2004-09-03 Diffuseur pour une pompe rotatoire Expired - Lifetime EP1520992B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10346058A DE10346058A1 (de) 2003-10-04 2003-10-04 Kreiselpumpen-Leitrad
DE10346058 2003-10-04

Publications (3)

Publication Number Publication Date
EP1520992A2 true EP1520992A2 (fr) 2005-04-06
EP1520992A3 EP1520992A3 (fr) 2005-07-27
EP1520992B1 EP1520992B1 (fr) 2006-06-21

Family

ID=34306248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04020975A Expired - Lifetime EP1520992B1 (fr) 2003-10-04 2004-09-03 Diffuseur pour une pompe rotatoire

Country Status (3)

Country Link
EP (1) EP1520992B1 (fr)
AT (1) ATE331143T1 (fr)
DE (2) DE10346058A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105756956A (zh) * 2016-04-05 2016-07-13 镇江江大泵业科技有限公司 一种新型切割式潜水排污泵

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH237680A (de) * 1942-07-21 1945-05-15 Voith Gmbh J M Aus Blech gebogene Leitschaufel für Axialgebläse.
SE384070B (sv) * 1974-07-23 1976-04-12 Stenberg Flygt Ab Propellerpump
DE3872139D1 (de) * 1987-09-30 1992-07-23 Winkelmann & Pannhoff Gmbh Verfahren zur herstellung von foerder und/oder leiteinrichtungen fuer stroemungsmaschinen und nach diesem verfahren hergestelltes radial-laufrad, insbesondere kuehlmittelpumpenrad fuer brennkraftmaschinen.
DE4330098A1 (de) * 1993-09-06 1995-03-09 Klein Schanzlin & Becker Ag Als Blechformteil ausgebildete Leiteinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105756956A (zh) * 2016-04-05 2016-07-13 镇江江大泵业科技有限公司 一种新型切割式潜水排污泵

Also Published As

Publication number Publication date
EP1520992A3 (fr) 2005-07-27
ATE331143T1 (de) 2006-07-15
EP1520992B1 (fr) 2006-06-21
DE10346058A1 (de) 2005-04-21
DE502004000817D1 (de) 2006-08-03

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