EP3204651A1 - Kreiselpumpe - Google Patents
KreiselpumpeInfo
- Publication number
- EP3204651A1 EP3204651A1 EP15774925.0A EP15774925A EP3204651A1 EP 3204651 A1 EP3204651 A1 EP 3204651A1 EP 15774925 A EP15774925 A EP 15774925A EP 3204651 A1 EP3204651 A1 EP 3204651A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- centrifugal pump
- housing
- shaft
- parting lines
- pump according
- 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
Links
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
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
-
- 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
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
Definitions
- the invention relates to a centrifugal pump with at least one impeller rotatably connected to a shaft and a housing having parting lines.
- Centrifugal pumps are based on the principle of action of energy transfer to a fluid by swirl change due to a torque. The energy is transferred from a uniformly rotating impeller to the flowing fluid.
- the centrifugal pump is a work machine according to the direction of the energy flow, according to the type of energy conversion, a turbomachine and the type of fluid, a hydraulic fluid machine. Centrifugal pumps are able to continuously convey even high flow rates to high and highest pressures.
- the housing of the centrifugal pump serves for the liquid-tight and pressure-tight closure of the pump interior to the outside. It encloses the pump rotor, which supplies energy to the pumped medium through wheels on the rotating shaft.
- the pressure range determines the housing shape.
- Low-pressure pumps for example, require constructive solutions other than high-pressure and high-pressure pumps.
- the wall thickness of the housing must be increased.
- the dimensions of the pump housing must comply with both national and international regulations.
- volute casing and multistage high pressure pumps the outer geometrical shapes are adapted to cylindrical, tapered or spherical pump housings. Despite the high internal pressure, these configurations allow a low stress on the pump housing and suitable manufacturing methods for thick-walled (forged) components.
- DE 35 17 828 C2 shows a centrifugal pump with a housing having an axial suction nozzle, a radial discharge nozzle and a pressure-side mounting flange. At the suction nozzle, a connection flange is attached, which is provided with force-dissipating elements.
- the object of the invention is to provide a centrifugal pump whose housing segments are sealed in a simple and reliable manner, so that the centrifugal pump has no leakage even at high delivery pressures.
- the centrifugal pump should be characterized by a cost-effective production method, a reliable mode of operation, as well as a long service life.
- the joints have micro-serrations between the individual housing parts of the centrifugal pump.
- the surfaces between the individual segments have a smooth surface
- the surfaces of adjacent segments are provided in the centrifugal pump according to the invention with a surface structure having a micro-toothing.
- These are not macro forms but structures on the micrometer scale.
- the micro-toothing between the housing parts of the centrifugal pump leads to a high lateral stability. As a result, for example, additional cross-fixing elements can be dispensed with.
- the micro-toothing leads to an unmistakable assignment of the individual housing segments of the centrifugal pump to each other.
- the microstructure allows an exact fit.
- this is an irregular micro-toothing.
- This has interlocking, corresponding forms.
- the centrifugal pump according to the invention is characterized by a high degree of tightness even at high delivery pressures.
- the joints between the individual housing parts in contrast to conventional centrifugal pumps, no longer visible.
- the micro-toothing allows an exact fit, which allows an optimal force transmission between the individual housing parts.
- the centrifugal pump according to the invention is characterized by a very high accuracy of fit and a high load capacity. In addition, the crevice corrosion which frequently occurs in centrifugal pumps is prevented.
- the joints are formed as fracture surfaces, and it proves to be advantageous if it is brittle fracture surfaces.
- a material is used for the pump housing, which has a high brittleness. It has been shown that this favors the separation.
- the pump housing is first manufactured in one piece, for example as a cast component. Then predetermined breaking points are introduced. For example, these can be notch sites that are made by laser.
- a mandrel is preferably driven into the pump housing. The fracture plane is aligned by a targeted arrangement of the notches.
- the predetermined breaking points are chosen so that the micro-toothed parting lines run transversely to the shaft of the centrifugal pump. In this way, a pump housing is created with a transverse distribution.
- the predetermined breaking points can be arranged so that the joints are arranged in a plane to the shaft of the centrifugal pump. According to the invention, this creates a pump housing with a longitudinal division.
- the pump housing is supported in the process. As a result, excessive deformation in the region of the fracture plane can be avoided.
- the micro-toothed parting lines run through a suction nozzle and / or a discharge nozzle of the centrifugal pump. Preferably, this is a longitudinal division.
- the parting lines can also run through housing areas through which the shaft is led out. In these areas, a seal is arranged between shaft and housing.
- At least one parting line divides the housing into a segment which surrounds the impeller and a segment which surrounds the radial and / or axial bearings and thus forms the bearing housing.
- FIG. 1 shows a centrifugal pump with an impeller 1, which is fixed to a shaft 2.
- the centrifugal pump comprises a housing 3, which surrounds a space 4 filled with liquid.
- the housing 3 is a spiral housing in the exemplary embodiment.
- the impeller 1 is rotatably disposed in the housing 3.
- the housing 3 has a suction nozzle 5 and a discharge nozzle 6.
- the shaft 2 is driven by a motor, which is not shown in Figure 1.
- the shaft 2 is guided by bearing assemblies 7.
- the bearing assemblies 7 include radial bearings and / or thrust bearings.
- the housing 3 is divided transversely to the shaft 2 in the embodiment.
- a segment 8 of the housing 3 surrounds the impeller 1 together with the liquid-filled space 4.
- Another segment 9 of the housing 3 surrounds a part of the shaft 2.
- Another segment 13 surrounds the bearing assemblies 7, which includes radial and / or thrust bearing. Due to the transverse division, the housing 3 is subdivided into the segments 8, 9 and 13.
- FIG. 2 shows an enlarged illustration of the detail A according to FIG. 1.
- the parting line 10 has irregular micro-toothings.
- the parting line 10 is formed by two adjoining surfaces.
- the surfaces have elevations 11 and depressions 12.
- the elevations 11 and depressions 12 are interlocking, mutually corresponding shapes on the micrometer scale.
- the parting line 10 is formed by two fracture surfaces. These are brittle fracture surfaces.
- the surfaces are generated by fracture separation.
- a predetermined breaking point is introduced as a notch in the housing 3 and then exerted by means of a mandrel a force to this predetermined breaking point, so that the housing 3 breaks.
- the housing 3 is divided into a segment 8, a segment 9 and a segment 13.
- the segment 8 surrounds the impeller 1 and the fluid.
- the segment 9 surrounds a part of the shaft 2.
- the segment 13 surrounds the bearing assembly 7, which includes radial and thrust bearings.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014220364.3A DE102014220364A1 (de) | 2014-10-08 | 2014-10-08 | Kreiselpumpe |
| PCT/EP2015/072993 WO2016055444A1 (de) | 2014-10-08 | 2015-10-06 | Kreiselpumpe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3204651A1 true EP3204651A1 (de) | 2017-08-16 |
| EP3204651B1 EP3204651B1 (de) | 2020-05-13 |
Family
ID=54251517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15774925.0A Active EP3204651B1 (de) | 2014-10-08 | 2015-10-06 | Kreiselpumpe |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3204651B1 (de) |
| DE (1) | DE102014220364A1 (de) |
| DK (1) | DK3204651T3 (de) |
| ES (1) | ES2809520T3 (de) |
| WO (1) | WO2016055444A1 (de) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3652110A (en) * | 1970-03-05 | 1972-03-28 | Douglas N Manton | Formation of joints between tubular members |
| DE3517828A1 (de) | 1985-05-17 | 1986-11-20 | Klein, Schanzlin & Becker Ag, 6710 Frankenthal | Pumpengehaeuse |
| DK168834B1 (da) * | 1992-06-03 | 1994-06-20 | Man B & W Diesel Gmbh | Tætningsorgan |
| DE19653936A1 (de) | 1996-12-21 | 1998-06-25 | Klein Schanzlin & Becker Ag | Kreiselpumpengehäuse |
| EP1744053B1 (de) * | 2001-11-02 | 2008-09-17 | Bosch Automotive Systems Corporation | Dichtungsanordnung eines Kraftstoffkanals |
| DE102004013673B4 (de) * | 2004-03-19 | 2021-11-18 | Man Truck & Bus Se | Lagesicherung für Lagerschalen |
| DE102007016643A1 (de) * | 2007-04-05 | 2008-10-09 | Geislinger Gmbh | Kraftschlüssige Spannverbindung und Verfahren zu deren Herstellung |
| DE202008004290U1 (de) * | 2008-03-27 | 2009-08-06 | Mann+Hummel Gmbh | Filterverschluss-System |
| CN101555966B (zh) * | 2008-12-31 | 2013-06-12 | 浙江华夏阀门有限公司 | 微观锯齿环密封对接结构 |
| DE102011050506B4 (de) * | 2011-05-19 | 2013-04-18 | Benteler Automobiltechnik Gmbh | Abgasturbolader |
| DE102012102406A1 (de) * | 2012-03-21 | 2013-09-26 | Magna Steyr Fahrzeugtechnik Ag & Co Kg | Elektromotor mit Gehäusekühlung |
| US10309416B2 (en) * | 2012-11-29 | 2019-06-04 | Ruhrpumpen Sa De Cv | Seal system for centrifugal pumps having axially split casings |
-
2014
- 2014-10-08 DE DE102014220364.3A patent/DE102014220364A1/de not_active Withdrawn
-
2015
- 2015-10-06 DK DK15774925.0T patent/DK3204651T3/da active
- 2015-10-06 ES ES15774925T patent/ES2809520T3/es active Active
- 2015-10-06 WO PCT/EP2015/072993 patent/WO2016055444A1/de not_active Ceased
- 2015-10-06 EP EP15774925.0A patent/EP3204651B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| ES2809520T3 (es) | 2021-03-04 |
| EP3204651B1 (de) | 2020-05-13 |
| DK3204651T3 (da) | 2020-08-03 |
| WO2016055444A1 (de) | 2016-04-14 |
| DE102014220364A1 (de) | 2016-04-14 |
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