EP4229740A1 - Pompe centrifuge comprenant un entraînement - Google Patents

Pompe centrifuge comprenant un entraînement

Info

Publication number
EP4229740A1
EP4229740A1 EP21787386.8A EP21787386A EP4229740A1 EP 4229740 A1 EP4229740 A1 EP 4229740A1 EP 21787386 A EP21787386 A EP 21787386A EP 4229740 A1 EP4229740 A1 EP 4229740A1
Authority
EP
European Patent Office
Prior art keywords
fan
heat sink
motor
centrifugal pump
bearing
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.)
Pending
Application number
EP21787386.8A
Other languages
German (de)
English (en)
Inventor
Axel Schunk
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 SE and Co KGaA
Original Assignee
KSB SE and Co KGaA
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 SE and Co KGaA filed Critical KSB SE and Co KGaA
Publication of EP4229740A1 publication Critical patent/EP4229740A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/15—Mounting arrangements for bearing-shields or end plates
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle

Definitions

  • the invention relates to a centrifugal pump with a drive that has a rotor, a stator winding and a device that includes a frequency converter and a heat sink, the drive having a motor housing and a fan, and a shaft being supported by a bearing assembly on the fan side and a bearing assembly on the pump side .
  • a centrifugal pump assembly usually includes one or more centrifugal pumps, one or more electric motors and electronic devices for speed control and frequency conversion.
  • the electric motors and the associated motor electronics require adequate cooling.
  • the motor electronics are often provided on the outer wall of the motor. This usually includes a frequency converter and power control and/or speed control.
  • the motor electronics are often arranged on a base so that the waste heat from the electric motor does not affect the electronics. As a result, however, the cooling air flow from the motor no longer reaches the arrangement of the electronics in a sufficient manner, as a result of which separate cooling of the electronics is often necessary.
  • DE 10 2008 051 650 A1 discloses an invention with joint cooling of the motor and the motor electronics, in which the air flow is sucked in through the cooling skeleton of the electronics cooling before the fan impeller drives the air flow to cool the motor skeleton.
  • the focus here is on the cooling of very large motor electronics, which are installed both axially and radially around the motor.
  • the object of the invention is to design a component in such a way that an electric motor and its motor electronics can be cooled simultaneously with a fan.
  • the component should be able to accommodate a bearing that supports and holds the motor shaft.
  • This component should consist of as few individual parts as possible and thereby simplify assembly.
  • the component should consist of a thermally conductive material and be able to dissipate the heat generated by the motor and the motor electronics.
  • the design of the component should reduce the number of mechanical interfaces and seals. The replacement of spare parts should be favored by the design of the component.
  • the device should be able to be implemented simply and inexpensively. According to the invention, this object is achieved by a centrifugal pump with a drive having the features of claim 1 . Preferred variants can be found in the dependent claims, the description and the drawings.
  • a bearing arrangement on the fan side and/or a bearing arrangement on the pump side is connected to the heat sink of the motor electronics, in particular of the frequency converter.
  • These bearing arrangements have the function of a cover for the motor housing and carry the bearings for supporting the shaft, which are integrated into the bearing supports in a form-fitting and/or force-fitting manner.
  • the heat sink can be designed as an electronics housing base.
  • the cooling of the electric motor and the motor electronics can be designed to be particularly powerful due to the connected construction of the bearing arrangement with the heat sink.
  • the bearing arrangement on the fan side is connected to the heat sink.
  • the heat sink can form the basis for the arrangement of the motor electronics and can be optimized in its design, including cooling fins, for dissipating heat from the motor electronics, which can include a frequency converter and power control and speed control. Due to the bonded construction, heat conduction to the cooled surfaces is improved. In addition, the cooling air flow generated by the fan can dissipate the heat from the electric motor and the motor electronics particularly well thanks to the sensibly arranged air ducts.
  • the pump-side bearing arrangement is connected to the heat sink in the form of the pump-side bearing cap.
  • the heat sink is designed in one piece with the bearing arrangement on the fan side.
  • the heat sink With the molded cooling fins and the bearing arrangement on the fan side, it is particularly efficient in terms of heat conduction.
  • the reduction in the parts to be assembled and the sealing surfaces due to the one-piece design makes assembly particularly easy. At the same time, the exchange of spare parts is possible without great effort.
  • the heat sink can be designed as a plate-shaped element that serves as the base of the motor electronics.
  • connection of the heat sink to a motor housing cover is designed in the form of a screw connection, so that assembly requirements based on the motor geometry can be designed in an assembly-friendly manner.
  • the bottom of the electronics housing which is designed as a heat sink and has surface-enlarging elements to increase the cooling capacity, is particularly advantageous. These are optimized in the form of cooling fins for heat dissipation and are designed in one piece with the heat sink.
  • the surface of the cooling fins is dimensioned with regard to the expected heat development of the motor electronics.
  • the cooling fins of the electronics housing are adapted to the shape of the motor housing.
  • the heat sink with integrally formed cooling ribs includes additional air baffles in combination with cutouts that contribute to increasing the cooling air flow and enable powerful cooling of the motor electronics.
  • the bearing arrangement which can be, for example, a fan-side or a pump-side bearing cover of the motor housing, has recesses and bushings for cables and plugs. This creates a connection between the motor electronics and the stator winding.
  • the bearing arrangement of the electric drive according to the invention can be used both for asynchronous motors and for synchronous motors, in particular for synchronous reluctance motors.
  • the fan of the electric drive draws in a flow of air centrally through the perforated fan cover, thereby generating a primary flow of air for cooling, which flows over the motor housing and the heat sink of the motor electronics.
  • the design of the fan cover allows a secondary air flow to be sucked in by the primary air flow, which means that the cooling capacity of the engine and the engine electronics can be particularly intensified.
  • a preferred variant of the invention is the one-piece design of the fan-side motor housing cover with the heat sink.
  • the one-piece bearing arrangement can be produced as a cast part from a material with high thermal conductivity, in particular aluminum.
  • the realization of the cooling in the form of a fan in combination with optimized ventilation ducts and surface-enlarging cooling fins with the particularly thermally conductive material aluminum can be regarded as extremely powerful.
  • the design of the one-piece bearing assembly with the heat sink advantageously enables the motor electronics and the electric motor to be cooled at the same time.
  • two separate cooling systems were often used, which can now be reduced to one particularly efficient cooling system.
  • 1 shows a schematic representation of a centrifugal pump with a connecting element and an electric drive
  • 2 shows a section of an electric drive of a centrifugal pump
  • FIG. 4 shows a perspective view of the inside of a bearing arrangement.
  • FIG. 1 shows the basic structure of a centrifugal pump which is driven by an electric drive 1 and is equipped with an impeller 2 and a housing 3 .
  • the housing 3 has an inlet 4 and an outlet 5.
  • a connecting element 6 is used to transmit the driving force supplied by the electric drive 1 to the impeller 2.
  • the fluid enters the pump chamber from the left through the inlet 4 and is axially Impeller 2 supplied.
  • the rotating impeller 2 transfers kinetic energy to the fluid, which builds up in the tapered pressure port and leaves the pump chamber upwards via the outlet 5 .
  • the connecting element 6 represents all technically known connection options between the drive 1 and the pump housing.
  • Fig. 2 is a section of an electric drive 1 of a centrifugal pump is shown.
  • the shaft 7 is supported and journalled by a pump-side bearing assembly 9 and a fan-side bearing assembly 17, thereby allowing it to rotate at the same time.
  • These bearing assemblies 9, 17 include a bearing support 10, 18, in which a roller bearing 8, 20 is embedded in a form-fitting manner.
  • these bearing arrangements 9, 17 also serve as a cover for the motor housing 11 and thus close the electric drive 1.
  • the shaft 7 has a rotor 25 .
  • the current to magnetic field in the stator winding 22 induces an opposing magnetic field in the rotor 25 and thereby sets it in motion.
  • the stator winding 22 is fixed by the stator laminations 24 .
  • the fan wheel 19 which is connected to the shaft 7 , is located in the bearing arrangement 17 .
  • the fan cover 21 encloses the space of the fan 19 and thus prevents unprotected access to the possibly rotating fan wheel.
  • the fan 19 draws in an air flow centrally through the perforated fan cover 21, thereby generating a primary air flow that is guided into a ring-like channel, limited by the design of the fan cover 21 and the bearing arrangement 17, and flows over the motor housing 11 for cooling.
  • the fan cover 21 is connected to the bearing arrangement 17 in such a way that an opening remains free underneath the heat sink 12, in particular the bottom of the electronics housing, through which the primary air flow sucks in a secondary air flow downstream, which in turn cools the electric drive 1 and the Cooling body 12 with its integrally formed cooling fins 26 intensified, the cooling fins 26 being shown in FIG.
  • the bearing arrangement 17 on the fan side is designed in one piece with the heat sink 12 .
  • the frequency converter 13 is arranged inside the heat sink 12 and connected in a heat-dissipating manner.
  • the heat sink 12 is closed with an electronics housing cover 16 on which an operating unit 15 for operating the motor electronics 14 is arranged.
  • FIG. 3 shows the heat sink 12, which in this exemplary embodiment of the invention is designed in one piece with the bearing arrangement 17 on the fan side, in a perspective side view.
  • Surface-enlarging elements 26 in the form of cooling ribs are integrally formed on the heat sink 12, which is designed in the form of an electronics housing base.
  • the design of the cooling ribs adapts to the motor housing 11, which is not shown in this figure.
  • the bushings 27 are used to connect the motor housing 11 to the bearing supports 10, 18 using connecting elements 23, which are preferably designed as screws.
  • the bearing support 18 shown in FIG. 3 comprises a circular base body on the connection side of which to the motor housing is connected to a pot-shaped wall.
  • FIG. 4 shows the heat sink 12, which in this exemplary embodiment of the invention is designed in one piece with the bearing arrangement 17 on the fan side, in a perspective internal view.
  • a guide channel 28 is integrated in the transition from the heat sink 12 to the bearing support 18, which is designed as a cover of the motor housing 11.
  • Such channels 28 can be rectangular, as shown in FIG. 4, although round and/or square channels are also conceivable, and can be implemented in the form of a recess within a cast part.
  • One or more elements for the connection between the frequency converter 13 and the stator winding 22 are guided through such a channel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

L'invention concerne une pompe centrifuge comprenant un entraînement (1) qui présente un rotor (25), un enroulement de stator (22) et un dispositif (14). Le dispositif (14) comprend un convertisseur de fréquence (13) et un dissipateur thermique (12). L'entraînement (1) comporte un carter de moteur (11) et un ventilateur (19). Un arbre (7) est supporté par un agencement de palier (17) côté ventilateur et un agencement de palier (9) côté pompe. Le dissipateur thermique (12) est relié à l'un des deux agencements de palier (9, 17).
EP21787386.8A 2020-10-16 2021-10-05 Pompe centrifuge comprenant un entraînement Pending EP4229740A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020006366.7A DE102020006366A1 (de) 2020-10-16 2020-10-16 Kreiselpumpe mit einem Antrieb
PCT/EP2021/077407 WO2022078816A1 (fr) 2020-10-16 2021-10-05 Pompe centrifuge comprenant un entraînement

Publications (1)

Publication Number Publication Date
EP4229740A1 true EP4229740A1 (fr) 2023-08-23

Family

ID=78085680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21787386.8A Pending EP4229740A1 (fr) 2020-10-16 2021-10-05 Pompe centrifuge comprenant un entraînement

Country Status (6)

Country Link
US (1) US20230387751A1 (fr)
EP (1) EP4229740A1 (fr)
JP (1) JP2023545837A (fr)
CN (1) CN116325441A (fr)
DE (1) DE102020006366A1 (fr)
WO (1) WO2022078816A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024008328A1 (fr) * 2022-07-04 2024-01-11 Sew-Eurodrive Gmbh & Co. Kg Abt. Ecg Moteur électrique doté d'un ventilateur

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59165941A (ja) 1983-03-11 1984-09-19 Hitachi Ltd インバ−タ駆動回転電機
DE3642724A1 (de) 1986-12-13 1988-06-23 Grundfos Int Elektromotor mit einem frequenzumrichter zur steuerung der motorbetriebsgroessen
DE4121430C1 (fr) 1991-06-28 1992-11-05 Grundfos International A/S, Bjerringbro, Dk
DE10339585A1 (de) 2003-08-26 2005-03-24 Wilo Ag Optimierte Kühlluftzuführung
DE10362051B4 (de) 2003-08-29 2016-05-19 Sew-Eurodrive Gmbh & Co Kg Elektromotor und Verfahren zur Herstellung
ATE402514T1 (de) * 2004-04-01 2008-08-15 Sew Eurodrive Gmbh & Co Elektromotor und baureihe von elektromotoren
DE102004031399B4 (de) * 2004-06-29 2007-04-12 Siemens Ag Umrichtermotor
US7977832B2 (en) * 2008-05-21 2011-07-12 Nidec Motor Corporation Cooling system for a motor and associated electronics
DE102008051650A1 (de) 2008-10-14 2010-04-15 Ksb Aktiengesellschaft An einem Elektromotor anordbares Gerät
US8760017B2 (en) 2010-07-05 2014-06-24 Hanning Elektro-Werke Gmbh & Co. Kg Electric machine
DE102015204025A1 (de) * 2015-03-06 2016-09-08 Continental Automotive Gmbh Elektrische Maschine mit einem Kühlkörper

Also Published As

Publication number Publication date
US20230387751A1 (en) 2023-11-30
CN116325441A (zh) 2023-06-23
JP2023545837A (ja) 2023-10-31
WO2022078816A1 (fr) 2022-04-21
DE102020006366A1 (de) 2022-04-21

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