EP1850015A2 - Pompe centrifuge - Google Patents

Pompe centrifuge Download PDF

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Publication number
EP1850015A2
EP1850015A2 EP07005221A EP07005221A EP1850015A2 EP 1850015 A2 EP1850015 A2 EP 1850015A2 EP 07005221 A EP07005221 A EP 07005221A EP 07005221 A EP07005221 A EP 07005221A EP 1850015 A2 EP1850015 A2 EP 1850015A2
Authority
EP
European Patent Office
Prior art keywords
housing part
spur
centrifugal pump
housing
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.)
Withdrawn
Application number
EP07005221A
Other languages
German (de)
English (en)
Inventor
Olai Ihle
Thomas Peterreins
Helmut Schmidt
Armin Suttner-Reimann
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.)
Buehler Motor GmbH
Original Assignee
Buehler Motor GmbH
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 Buehler Motor GmbH filed Critical Buehler Motor GmbH
Publication of EP1850015A2 publication Critical patent/EP1850015A2/fr
Withdrawn legal-status Critical Current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
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials 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
    • 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
    • F04D29/428—Discharge tongues
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the invention relates to a centrifugal pump (100) having an at least two-part pump housing (102) made of injection-molded plastic material, the first housing part (103) having an axially formed suction nozzle (105) and a pressure nozzle formed approximately tangentially on a circumferential wall (114) (106) is integral and has a sealing region (133), via which it is sealed to a second, an electric motor (10) accommodating housing part (104) is connected, wherein the pump housing (102) includes a substantially cylindrical conveyor through-flow pump chamber (109) , whose inner contour (120) is spiral-shaped, in which a pump impeller (59) driven by the electric motor (10) is rotatably arranged and arranged with a rounding (111) within the pump space (109) bounded by the two housing parts (103, 104) ) provided spur (112), the best of injection molding processable plastic material ht and not with the first housing part (103) is integral, wherein the spur (112) is arranged in the pump chamber (109), that in the transition region (113)
  • the transition between the pump chamber and the discharge nozzle is formed edged. This edge causes eddies in the flow, which significantly reduce the efficiency of the pump.
  • an angular transition was unavoidable in the known centrifugal pump. This is due to the fact that the angle of Entformungslegien between the first, the pump interior coaxially adjoining the suction nozzle and the discharge nozzle is at right angles in at least one of the spatial axes.
  • a generic centrifugal pump is from the DE-PS 100 03 644 C1 known.
  • the service life problem has been solved in that the spur, which allows a laminar, efficiency-optimized flow, is integrally formed with the second housing part. In the assembled state then results in the desired optimum shape.
  • the spray tools required for this purpose no longer have any thermally critical geometries.
  • the arrangement of the spur on the second housing part may have a disadvantageous effect if the centrifugal pump for different applications with different arrangements of the pressure nozzle should be usable because the second housing part contains both pump attachment means and the spur, which indirectly determines the orientation of the pressure nozzle. In this case, the second housing part must be adapted to the particular application. This has a negative effect on the economy and productivity.
  • the spur (112) with the second housing part (104) is not integral, that it is firmly connected to the pump housing (102) that there is no additional sealing material between the spur and the pump housing and that first housing part (103) with respect to the second housing part (104) is mountable in more than one position, so that the orientation of the pressure port (106) is different selectable for different applications.
  • the first housing part (103) with the suction and the discharge nozzle can be secured by the separation of the spur from the second housing part (104) in any desired angular position to the second housing part. Since the spur is also separated from the first housing part, it can be manufactured with optimized tool geometry with high productivity. Due to the fixed connection of the spur with the pump housing, a high efficiency is achievable and noise problems that could arise from play between spur and pump housing are excluded. Parts and assembly costs can be saved if between the Spur and the pump housing no additional sealing material must be introduced.
  • the spur is pressed into a corresponding receptacle of the housing.
  • the spur can not fall out of the mounted position by incorrect handling again. It is basically a combination of positive and non-positive connection.
  • the spur and pump housing are at least approximately the same.
  • the spur should therefore consist of the same material as the pump housing itself.
  • the pump housing parts to be joined are made of the same material, they can be welded together in a relatively simple manner.
  • a particularly preferred welding technology is the already mentioned laser transmission welding, which requires a transparent material for the laser light and a material absorbing the same laser light.
  • the laser light is passed through the transparent material of the one housing part and directed onto the absorbent material of the second housing part.
  • the absorption of the laser light produces heat at the interface between the parts to be joined. Due to the high thermal resistance, this can not escape quickly enough, so that quickly reaches a temperature sufficient for the melting of the plastic in the boundary region. This creates an intimate connection.
  • the materials of the two housing parts may be basically the same, with added for the absorbing effect additives that blacken the material. Russ is particularly suitable for this purpose.
  • the first housing part (103) has a first sealing area (133)
  • the second housing part (104) has a second sealing area (144) and a third sealing area (145)
  • the motor housing (44) has a fourth sealing area (444).
  • the second housing part (104) is integral with a containment shell (116) and the second seal area (144) and the third seal area (145) are so close together that a maximum of 20% of the total visible area of the centrifugal pump (100) and electric motor (10 ) are taken from the second housing part (104). This means that the size of the area that occupies the transparent material and possibly represents an optical restriction is minimized.
  • the curvature of the inner contour of the spur continuously pass from the curvature of the inner contour of the peripheral wall to the curvature of the inner contour of the pressure nozzle and form the inner contour of the spur as part of the spiral inner contour of the peripheral wall.
  • the peripheral wall of the pump chamber is cylindrical in order to be easily manufactured by injection molding without undercut can. Their resulting rectangular cross-section in the area of the pressure nozzle goes steadily and harmoniously into the circular shape of the said pressure nozzle.
  • the tapered contour does not meet the strength requirements in many cases. Therefore, it is provided to form the spur in the region of the pressure nozzle in a semi-cylindrical shape and on the opposite side to a, sufficient stability ensuring material thickness tapered.
  • the contour of the spur is on its inside part of a spiral channel. Thus, it goes from the cylindrical wall of the spiral channel steadily over into the approximately semi-cylindrical rounded curve. Its outer contour rests against the wall of the pump head, and the entire spur is designed so that it fits as harmoniously as possible into the wall of the pump head without impairing its strength.
  • Fig. 1 shows the first housing part 103 of a known centrifugal pump, consisting of an axially molded suction nozzle 105, an approximately tangentially formed discharge nozzle 106 and a substantially cylindrical, radially bounded by the wall 114 spiral pump chamber 109.
  • the transition region 113 between the wall 114 and the discharge nozzle 106 is formed by a sharp edge 115.
  • This edge 115 has an unfavorable effect on the efficiency of the pump, as at this point the laminar flow is disturbed sensitive and so the Flow resistance significantly increased.
  • FIG. 2 shows a spatial representation of a fluid-mechanically favorable solution for the first housing part 103, consisting of an axially formed suction nozzle 105, a discharge nozzle 106 and a substantially cylindrical, radially bounded by a peripheral wall 114 helical pump chamber 109.
  • a transition region 113 between the peripheral wall 114 and the discharge nozzle 106 forms a spur 112 with a circular contour 111.
  • As part of a spiral channel of the spur 112 is shaped so that its curvature passes continuously from the peripheral wall 114 to an inner contour 120 of the pressure nozzle 106. Due to the hereby necessary tapered tongue of a tool positive caused lower downtime of a tool production of this housing part 103 is uneconomical.
  • the spur 112 is disposed in the transition region between the narrowest and the widest point of the spiral gap between a pump impeller 59 and the inner contour 120 of the peripheral wall 114.
  • FIG. 3 shows a second housing part 104, which can be produced by injection molding technology, from one of the DE 100 03 644 C1 known centrifugal pump 100, which is effectively the centrifugal pump 100 of FIG. 2.
  • the second housing part 104 is integral with a spur 112, which has a rounding 111.
  • the second housing part has a sealing flange 133 and a rotor chamber 118, wherein the rotor chamber 118 is bounded by a gap pot 116, which is arranged in the air gap between a rotor and a stator (not shown) of an electric motor 10.
  • the solution shown is applicable to both internal rotor and external rotor motors.
  • the spur 112 which is integral with the second housing part 104, is shown arranged in a transition region 113 between a peripheral wall 114 and a discharge nozzle 106; it conforms to the inside of the circumferential wall 114.
  • the first housing part 103 and the second housing part 104 have pump fastening means 122, which are designed in the form of fastening eyes which serve as screw passages. Since the spur 112 is integral with the second housing part 104, the first housing part 103 can occupy only a single angular position with respect to the second housing part 104, although four pump fastening means are uniformly distributed on the circumference of the pump housing.
  • FIG. 5 shows an exploded view of a pump housing 102, 103 with spur 112 according to the invention.
  • the spur 112 has a dovetail contour 150 which extends with a complementary contour 151 of the pump housing 102, 103, which extends axially parallel to a cylinder-jacket-shaped region of the first housing part 103. is positively engaged (Fig. 6).
  • the dovetail contour 150 has a V-shaped recess 152 which on the one hand allows a certain elasticity of the dovetail contour 150 and on the other hand bypasses the accumulation of material which is always to be avoided during the injection molding process.
  • the spur 112 is held in a form-fitting manner by a first pump housing part 103 and by a second pump housing part 104.
  • the illustrated first housing part 103 further has a first flange 130 and a first ring 131.
  • the first ring 131 has on its outer side a first sealing region 133, which is formed hermetically sealed with a second sealing region of the second housing part, not shown here.
  • an intake-side axle receptacle 47 is shown, which is connected via three supports to the first housing part 103.
  • the first housing part 103 has an inlet nozzle 105, a discharge nozzle 106, a first flange 130 and a first ring 131 which connects to the first flange and has a first sealing region 133.
  • the second housing part 104 comprises the containment shell 116, a second flange 140 and a second ring 141 which has on its inside a second sealing area 144 and a third sealing area 145.
  • a motor housing part 44 comprises a third ring 441 and a fourth sealing area 444.
  • the pump housing and the motor housing parts are hermetically welded together by means of the laser transmission welding process.
  • FIG. 8 shows a sectional view through a centrifugal pump 100 according to the invention, comprising a pump housing 102, comprising a first housing part 103 and a second housing part 104 adjoining thereto.
  • a motor housing part 44 delimits a drying space which is defined by a stator (40) of an electronically commutated direct current motor his control electronics is filled.
  • the motor housing part 44 connects to the second housing part 102 and.
  • the first and the second housing part 103, 104 define a wet space 101 of the centrifugal pump.
  • the second housing part 104 is formed integrally with a split pot 116, which the wet space 101 of a drying room 99th
  • the wet room 101 includes an axle 49 which is fixedly installed between a cradle-side axle receptacle 48 and an intake-side axle receptacle 47. A knurling at the axis end prevents rotation of the axis 49 during pump operation.
  • a fixed bearing 54 is rotatably mounted, which is pressed in a hollow shaft 51 of the rotor 50.
  • the shaft 51 is integral with a pump impeller 59 which includes a plurality of approximately spirally shaped wings 591 for the fluid delivery.
  • the end faces of the fixed bearing 54 can be supported axially with the interposition of thrust washers against the gap-side axle receptacle 48 and against the intake-side axle receptacle 47.
  • a hollow cylindrical ferrite magnet 52 is adhered to the hollow shaft 51, using an elastic adhesive which is inserted into four or five axially parallel grooves 511 formed in the hollow shaft.
  • the drying chamber 99 contains the stator 40 of the electronically commutated DC motor 10, which is designed in the form of a hollow cylindrical stator winding 41, wherein the magnetic field is guided in operation via claw poles in an alternating manner to the periphery of the can 116 and with the hollow cylindrical permanent magnet 52 in the wet space 101st interacts.
  • the magnetic circuit is closed by a return ring 43, which is connected to the claw poles 42.
  • the claw poles 42 are provided by encapsulation with an insulating body 46 which connects the claw poles 42 mechanically but not magnetically.
  • the stator 40 has four pole pairs in the present example.
  • the Isolierstoff Sciences 46 is geometrically shaped so that the winding wires of the stator winding 41 with Klemmschneid brieflye having contact pins 62 are connected, said Klemmschneid brieflye are mechanically fastened in Isolierstoff emotions 46.
  • the contact pins 62 are formed as combination contacts and pressed at its end opposite the clamping cutting contact 63 in a printed circuit board 61 and thereby contacted with this.
  • the contact pins 62 contain one or two deformable press-fit zones for this purpose.
  • the circuit board 61 includes a Hall sensor 71, an integrated circuit 70 (IC) for wiring the stator winding, a winding protection PTC, power devices, and power supply pins 64.
  • the motor housing part 44 includes a connector housing 65 in which the connector pins 64 are arranged. Electronic components with a great deal of heat loss are heated via heat conducting films 67 to the wet space 101.
  • Conductor tracks which serve for contacting components to be cooled, are dimensioned such that, for easier heat dissipation, conductor tracks 66 which are as wide as possible are provided on the printed circuit board 61.
  • the different conductor tracks 66 are of different widths, depending on how much heat is generated in the component connection to be contacted.
  • a longitudinal groove is formed as a cooling channel between a bottom 117 of the gap pot 116 and the pump impeller 59, which forces a continuous circulation of the fluid also in the interior of the containment shell 116.
  • the printed circuit board is arranged between an end face 45 of the motor housing 44 and the bottom 117 of the can 116 and held in heat-conducting contact with the bottom 117 via the heat-conducting film 67.
  • the first housing part 103 has a first flange 130 and a first ring 131 adjoining thereto.
  • the second housing part 104 has a second flange 140 and a second ring 141 adjoining thereto.
  • the motor housing part has a third ring 441.
  • the second flange 140 and the second ring 141 together form a T-shape in cross-section.
  • the first sealing region is located on the radially outer side of the first ring 131 on the first housing part 103.
  • Opposite on the radially inner side of the second ring 141 and the second housing part 104 is the second sealing region 144.
  • the third sealing region 145 is located on the radially outer side of the third ring 441 and of the motor housing part 44.
  • the second housing part 104 consists of one for laser light of one wavelength or a wavelength range permeable material.
  • the first housing part 103 and the motor housing part 44 are made of a material absorbing the same laser light. This allows a laser beam without heating the transparent material to a seam lead. There, the beam encounters material that absorbs the light and converts it to heat, causing the plastic to melt and intimately bond with the adjacent material.
  • the welding device may comprise two individual lasers, wherein one weld seam is produced in each case with one laser beam or it may comprise a single laser whose output beam is separated by a beam splitter into two Beams is divided, each of which generates one of the welds.
  • the laser beams are directed radially onto the pump housing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP07005221A 2006-04-28 2007-03-14 Pompe centrifuge Withdrawn EP1850015A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006021245A DE102006021245B4 (de) 2006-04-28 2006-04-28 Kreiselpumpe

Publications (1)

Publication Number Publication Date
EP1850015A2 true EP1850015A2 (fr) 2007-10-31

Family

ID=38051878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07005221A Withdrawn EP1850015A2 (fr) 2006-04-28 2007-03-14 Pompe centrifuge

Country Status (2)

Country Link
EP (1) EP1850015A2 (fr)
DE (1) DE102006021245B4 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011005139A1 (de) * 2011-03-04 2012-09-06 E.G.O. Elektro-Gerätebau GmbH Strömungsleiteinrichtung für eine Pumpe und Pumpe
DE102011005138A1 (de) * 2011-03-04 2012-09-06 E.G.O. Elektro-Gerätebau GmbH Pumpe
CN105221486A (zh) * 2015-11-09 2016-01-06 温州市海格阀门有限公司 一种专用于家酿啤酒制造的离心泵端盖
CN106555780A (zh) * 2015-09-28 2017-04-05 戴博邦浦股份有限公司 离心式电动泵以及用于这种电动泵的蜗壳

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011013829A1 (de) * 2011-03-11 2012-09-13 Ruhrpumpen Gmbh Spalttopf einer Magnetkupplung, insbesondere einer Magnetkupplungspumpe
DE102012222358A1 (de) * 2012-12-05 2014-06-05 Mahle International Gmbh Elektrische Flüssigkeitspumpe
CN106194837B (zh) * 2016-07-13 2018-07-27 佛山市威灵洗涤电机制造有限公司 离心泵的泵壳、离心泵及洗碗机
DE102019001882A1 (de) * 2019-03-19 2020-09-24 KSB SE & Co. KGaA Mantelgehäusepumpe und Herstellungsverfahren für eine Mantelgehäusepumpe
TWI714437B (zh) * 2020-01-17 2020-12-21 建準電機工業股份有限公司 液冷式散熱系統及其泵浦
TWI722832B (zh) * 2020-03-16 2021-03-21 建準電機工業股份有限公司 液冷式散熱系統及其泵浦
DE102021107352A1 (de) 2021-03-24 2022-09-29 Ebm-Papst St. Georgen Gmbh & Co. Kg Mehrteiliges Lüftergehäuse mit festgelegter Montageposition
DE202021101829U1 (de) 2021-04-07 2022-07-26 K.H. Brinkmann GmbH & Co Kommanditgesellschaft Pumpe mit Überwachungsschaltung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1158841B (de) * 1959-06-10 1963-12-05 M U K H Schreiner Saugbagger U Pumpe zur Foerderung von Feststoff-Wasser-Gemischen mit auswechselbarem Innengehaeuse
DE19956380C1 (de) * 1999-11-24 2001-01-04 Bosch Gmbh Robert Flüssigkeitspumpe mit einem Motorgehäuse und Verfahren zur Herstellung eines Motorgehäuses
DE10003644C1 (de) * 2000-01-28 2001-05-10 Buhler Motor Gmbh Kreiselpumpe
LU90784B1 (en) * 2001-05-29 2002-12-02 Delphi Tech Inc Process for transmission laser welding of plastic parts

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011005139A1 (de) * 2011-03-04 2012-09-06 E.G.O. Elektro-Gerätebau GmbH Strömungsleiteinrichtung für eine Pumpe und Pumpe
DE102011005138A1 (de) * 2011-03-04 2012-09-06 E.G.O. Elektro-Gerätebau GmbH Pumpe
DE102011005139B4 (de) * 2011-03-04 2014-05-28 E.G.O. Elektro-Gerätebau GmbH Strömungsleiteinrichtung für eine Pumpe und Pumpe
US8899918B2 (en) 2011-03-04 2014-12-02 E.G.O. Elektro-Gerätebau GmbH Pump
CN106555780A (zh) * 2015-09-28 2017-04-05 戴博邦浦股份有限公司 离心式电动泵以及用于这种电动泵的蜗壳
CN105221486A (zh) * 2015-11-09 2016-01-06 温州市海格阀门有限公司 一种专用于家酿啤酒制造的离心泵端盖

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Publication number Publication date
DE102006021245B4 (de) 2008-03-06
DE102006021245A1 (de) 2007-10-31

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