EP4232717A1 - Groupe de pompes - Google Patents

Groupe de pompes

Info

Publication number
EP4232717A1
EP4232717A1 EP21791010.8A EP21791010A EP4232717A1 EP 4232717 A1 EP4232717 A1 EP 4232717A1 EP 21791010 A EP21791010 A EP 21791010A EP 4232717 A1 EP4232717 A1 EP 4232717A1
Authority
EP
European Patent Office
Prior art keywords
pump group
oil
impeller
collar
rotor
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
EP21791010.8A
Other languages
German (de)
English (en)
Inventor
Alfonso SURACE
Danilo MUSCIO
Luca DALLERA
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.)
Industrie Saleri Italo SpA
Original Assignee
Industrie Saleri Italo SpA
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 Industrie Saleri Italo SpA filed Critical Industrie Saleri Italo SpA
Publication of EP4232717A1 publication Critical patent/EP4232717A1/fr
Pending legal-status Critical Current

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
    • F04D29/06—Lubrication
    • F04D29/061—Lubrication 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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0653—Units comprising pumps and their driving means the pump being electrically driven the motor being flooded
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/049—Roller bearings
    • 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
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • 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
    • F05D2260/00—Function
    • F05D2260/20—Heat transfer, e.g. cooling
    • 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
    • F05D2260/00—Function
    • F05D2260/20—Heat transfer, e.g. cooling
    • F05D2260/232—Heat transfer, e.g. cooling characterized by the cooling medium

Definitions

  • the present invention relates to a pump group for a cooling system of a vehicle.
  • vehicle means any means of locomotion that comprises an internal combustion engine and also hybrid powered vehicles, without any limitation related to type or size, i.e. an automobile or an articulated vehicle.
  • the present invention relates to the automotive sector and specifically to the thermal management system of a vehicle.
  • said cooling system is specific to the cooling of a "operating group" of the vehicle.
  • operating group means a specific component or group of components for carrying out a specific operation required for vehicle movement.
  • the “operating group” comprises the engine group, for example an internal combustion engine or an electric motor.
  • the "operating group” comprises other components of the vehicle, both mechanical-type components, such as a transmission assembly, and electrical-type components, such as a "battery assembly” included in the vehicle.
  • mechanical-type components such as a transmission assembly
  • electrical-type components such as a "battery assembly” included in the vehicle.
  • the pump group of the present invention falls within this context, having an electric drive.
  • the pump group of the present invention comprises at least one electric motor which drives the rotation of the impeller included therein, thus propelling the cooling liquid which flows in the cooling system to which the pump group is fluidically connectable .
  • the purpose of the present invention is therefore to provide a pump group for a cooling system of an operating group of a vehicle effectively cools all the controlling electronic components, thus solving the problems mentioned above.
  • FIG. 1 [0015] - figures la and lb show two longitudinal cross- sectional views of a pump group according to the present invention along different cross-sectional planes, according to a possible embodiment, shown in a vertical operating position;
  • FIG. 1 shows a longitudinal cross-sectional view of a pump group according to the present invention, according to a possible embodiment, shown in a horizontal operating position;
  • FIG. 3 shows a longitudinal cross-sectional view of a pump group according to the present invention, according to a possible embodiment, shown in an inclined operating position.
  • the reference number 1 refers to a pump group for a cooling system of an operating group of a vehicle as a whole, preferably for cooling the operating group, for example an internal combustion operating group.
  • the pump group 1 of the present invention lies mainly lengthwise with respect to an axis X-X.
  • the pump group 1 of the present invention comprises an impeller 2 rotatable about said axis X-X.
  • said impeller 2 has a center of rotation which lies on said axis X-X.
  • the impeller 2 is of the radial type being specially designed to perform a suction action on the cooling liquid preferably in the axial direction, and to perform a propelling action preferably in the radial direction.
  • the "cooling liquid” is a water-based liquid, for example a solution comprising water and glycol, which circulates in the cooling system of the vehicle to which the pump group 1 of the present invention is fluidically connectable.
  • the pump group 1 comprises a shaft 3 that lies lengthwise along the axis X-X.
  • said shaft 3 comprises a rotating end 32 on which the impeller 2 is integrally mounted.
  • the pump group 1 comprises an electric motor 4 suitable for rotating the shaft 3.
  • the electric motor 4 comprises a rotor 41 and a stator 42.
  • the rotor 41 and the stator 42 are arranged concentrically with respect to the axis X-X.
  • the rotor 41 is integrally mounted, for example keyed, on said shaft 3: the rotation of the shaft 3 and in turn of the impeller 2 corresponds to the electronically controlled rotation of the rotor 41.
  • the stator 42 axially and circumferentially surrounds the rotor 41.
  • the stator 42 comprises a plurality of stator coils forming stator poles.
  • the pump group 1 comprises an electronic control board operationally connected to the motor shaft 3 and suitable for controlling the rotation thereof about the axis X-X.
  • the electronic board controls the operation of the electric motor 4, hence the rotation of the shaft 3 and in turn of the impeller 2.
  • the pump group 1 comprises a pump body 5 which lies parallel and mainly around the axis X-X.
  • the pump body 5 is suitable for containing the various operating components of the pump group 1 and is suitable for being fluidically connectable to the vehicle cooling system.
  • the pump body 5 comprises along the axis X-X:
  • separating and supporting element 7 comprising a collar 70 which engages and rotatably supports the shaft 3;
  • the impeller chamber 60 and the motor chamber 80 are sealed from each other.
  • the "hydraulic portion” in which the cooling liquid flow is exclusively in the impeller casing 6 separated from the "electrical portion” contained in the motor casing 8 by the presence of the separating and supporting element 7.
  • said separating and supporting element 7 substantially has the shape of a flange and is engaged sealingly by the impeller casing 6 on one side and by the motor casing 8 on the other side.
  • the shaft 3 straddles the separating and supporting element 7 identifying the impeller end 32, on the one hand, and a motor end 34 on which the electric motor 4 34 is engaged opposite the other side.
  • the collar 70 extends by an axial section parallel to the axis X-X, comprising an axial passage 700 along which the shaft 3 is housed and extends.
  • the collar 70 has a tapered cross-section comprising a pointed end 10' proximal to the rotor 41, preferably housed in the stator 42.
  • the collar 70 has a flange end 70" proximal to the impeller 2 with a cross-section greater than the pointed end 10'.
  • the flange end 70" is therefore suitable for supporting greater loads and forces.
  • the separating and supporting element 7 comprises a sealing member 9 for providing a hydraulic seal between the impeller casing 6 and the motor casing 7.
  • the sealing member 9 is housed in the collar 70, in particular in the axial passage 700.
  • the sealing member 9 is positioned axially proximal to the impeller chamber 60.
  • the sealing member 9 is of the type comprising a first sealing member 91 and a second sealing member 92 mutually suitable for axially delimiting an airtight chamber 95.
  • the first sealing member 91 is of the water-tight type.
  • the second sealing member 92 is of the oil-tight type.
  • the second sealing member 92 is an oil retainer.
  • the separating and supporting element 7 comprises at least one vent channel 79 for fluidly connecting the airtight chamber 95 to the outside environment.
  • the pump group 1 comprises an amount of oil suitable for cooling the motor 41 and the stator 42 by convection.
  • Such quantity of oil is stored in the motor chamber 80 and is then moved by rotation of the rotor 41.
  • the oil is suitable for promoting cooling by thermal convection under both static and dynamic conditions.
  • the oil and cooling liquid circulate in separate portions of the pump group 1 without ever mixing. This eventuality is indeed prevented by the presence of the sealing member 9 and by the rotating member 35.
  • the oil is of the dielectric type.
  • the oil has a viscosity such that it allows for easy movement of the rotor 41. In other words, the presence of oil does not in any way hamper the movement of the rotor 41.
  • the shaft 3 comprises a rotating member 35 operationally connected to the collar 70.
  • the rotating member 35 is housed in the axial passage 700.
  • the rotating member 3 is radially engaged with the shaft 3 and the collar 70, particularly with the wall defining the axial passage 700.
  • the rotating member 35 is a bearing, preferably a double-row ball bearing.
  • the rotating member 35 has two rings of ball bearings 351, 352 axial spaced apart along the axis X-X.
  • the rotating member 35 does not serve an oil-tightness function.
  • the collar 70 comprises a lubrication conduit 75 through which the oil is free to flow in order to keep the rotating member 35 lubricated .
  • the collar 70 comprises a plurality of lubrication conduits 75, preferably evenly spaced apart angularly.
  • the collar 70 comprises at least three lubrication conduits 75.
  • each side comprises at least one lubrication conduit 75 with respect to an imaginary plane on which the axis X-X lies.
  • the oil has a specific viscosity and the lubrication conduit 75 has a diameter that allows the oil to flow as a function of the viscosity thereof.
  • the lubrication conduit 75 comprises an inlet 750 suitable for receiving oil and promoting the flow thereof through the lubrication conduit 75 toward the rotating member 35.
  • said inlet 750 has larger dimensions than the diameter of the lubrication conduit 75.
  • said inlet 750 also serves the purpose of acting as an oil compartment or tank so as to collect a predefined quantity of oil and allow it to flow into the corresponding lubrication conduit 75.
  • the inlet 750 is suitable for acting as a funnel for the oil toward the lubrication conduit 75.
  • the oil that is contained in the inlet 750 is suitable for lubricating the rotating member 35.
  • the lubrication conduit 75 is positioned axially ao as to allow oil to flow to the second ring of ball bearings 352.
  • the lubrication conduit 75 lubricates both the first ring of ball bearings 351 and the second ring of ball bearings 352.
  • the first ring of ball bearings 351 is lubricated directly by the oil in the motor chamber 80.
  • the second ring of ball bearings is also lubricated by the oil in the motor chamber 80, which lubricates the first ring of ball bearings 351.
  • the amount of oil is such that it establishes a free surface that is higher than the lubrication conduit 75 with respect to the axis X-X, so as to ensure a flow of oil to the rotating member 35.
  • the quantity of oil is such that it establishes a free surface that is higher than the lubrication conduit 75 with respect to the axis X-X in any spatial position of the pump group 1.
  • the pump group 1 is positionable in the vehicle in a vertical position or in a horizontal position or in an inclined position, and still have the same cooling properties, ensuring a high level of cooling of the electrical components.
  • the rotating member 35 is still lubricated so as to operate effectively, thus ensuring a high rotational speed of the impeller 2.
  • the pump group amply fulfills the intended purpose by solving the typical problems of the prior art.
  • the pump group advantageously comprises oil suitable for promoting the convection cooling of the "electrical portion" of the pump group.
  • the pump group effectively cools both the stator and the rotor by taking advantage of the fact that said rotor drives the oil and promotes forced convection.
  • the oil effectively lubricates the rotating member which operates under optimal conditions.
  • the heat generated by the electronic components is effectively carried and transmitted to the cooling liquid through the oil and the collar.
  • the presence of the oil is such that it evens out the temperature inside the motor chamber.
  • the pump group has a very limited number of components.
  • the pump group has extremely simple assembly steps.
  • the amount of oil and the number and/or positioning of the lubrication conduits are such that lubrication of the rotating member in any position of the pump group is assured.
  • the pump group is positionable inside a vehicle in any position.
  • the lubrication conduits are designed to ensure an inflow of lubricating oil even at the startup of the vehicle.
  • the lubrication conduits advantageously store a quantity of oil employable during vehicle startup.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Saccharide Compounds (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

L'invention concerne un groupe de pompes pour un système de refroidissement d'un groupe de fonctionnement d'un véhicule, de préférence le groupe moteur. Le groupe de pompes (1) s'étend par rapport à un axe (X-X) et comprend une roue d'impulseur (2), un arbre (3) sur lequel l'impulseur (2) est monté d'un seul tenant, et un moteur électrique (4) comprenant un rotor (41) monté d'un seul tenant sur l'arbre (3) et un stator (41) qui entoure axialement et circonférentiellement le rotor (41). Le groupe de pompes (1) comprend un corps de pompe (5) comprenant, le long de l'axe (X-X) : un carter d'impulseur (6) dans lequel est logé l'impulseur (2) ; un élément de séparation et de support (7) comprenant un collier (70) qui vient en prise et supporte de manière rotative l'arbre (3) ; un carter de moteur (8) dans lequel est logé le moteur électrique (4). Ladite chambre d'impulseur (60) et ladite chambre de moteur (80) sont séparées de manière étanche l'une de l'autre et la chambre de moteur (80) contient une quantité d'huile appropriée pour refroidir le rotor (41) et le stator (42) par convection, la rotation du rotor (41) propulsant l'huile.
EP21791010.8A 2020-10-26 2021-09-27 Groupe de pompes Pending EP4232717A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102020000025324A IT202000025324A1 (it) 2020-10-26 2020-10-26 Gruppo pompa
PCT/IB2021/058790 WO2022090827A1 (fr) 2020-10-26 2021-09-27 Groupe de pompes

Publications (1)

Publication Number Publication Date
EP4232717A1 true EP4232717A1 (fr) 2023-08-30

Family

ID=74194843

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21791010.8A Pending EP4232717A1 (fr) 2020-10-26 2021-09-27 Groupe de pompes

Country Status (5)

Country Link
EP (1) EP4232717A1 (fr)
CN (1) CN116670400A (fr)
IT (1) IT202000025324A1 (fr)
MX (1) MX2023003492A (fr)
WO (1) WO2022090827A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1653752A1 (de) * 1951-01-28 1971-07-01 Mowid Anstalt Tragbare,elektrisch angetriebene Tauchpumpe
JP5927766B2 (ja) * 2011-03-11 2016-06-01 株式会社ジェイテクト 電動ポンプユニット
JP6982380B2 (ja) * 2016-03-08 2021-12-17 コベルコ・コンプレッサ株式会社 スクリュ圧縮機
ITUA201679211U1 (it) * 2016-04-13 2017-10-13 Ind Saleri Italo Spa Dispositivo girante, dispositivo di comando e gruppo pompa acqua
KR102078830B1 (ko) * 2019-05-27 2020-02-19 주식회사 한진펌프 모듈형 누수 격실을 갖는 수중펌프

Also Published As

Publication number Publication date
IT202000025324A1 (it) 2022-04-26
CN116670400A (zh) 2023-08-29
WO2022090827A1 (fr) 2022-05-05
MX2023003492A (es) 2023-04-14

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