EP2055959A2 - Pompe pour circuits de refroidissement de moteur avec régulateur de flux actionné magnétiquement - Google Patents

Pompe pour circuits de refroidissement de moteur avec régulateur de flux actionné magnétiquement Download PDF

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Publication number
EP2055959A2
EP2055959A2 EP08004757A EP08004757A EP2055959A2 EP 2055959 A2 EP2055959 A2 EP 2055959A2 EP 08004757 A EP08004757 A EP 08004757A EP 08004757 A EP08004757 A EP 08004757A EP 2055959 A2 EP2055959 A2 EP 2055959A2
Authority
EP
European Patent Office
Prior art keywords
pump
engine cooling
cooling circuits
chamber
annular element
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Withdrawn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
EP08004757A
Other languages
German (de)
English (en)
Other versions
EP2055959A3 (fr
Inventor
Luca Armellin
Alessandro Don
Fabio Gatelli
Giulio Tanghetti
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.)
METELLI SpA
Original Assignee
METELLI 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 METELLI SpA filed Critical METELLI SpA
Publication of EP2055959A2 publication Critical patent/EP2055959A2/fr
Publication of EP2055959A3 publication Critical patent/EP2055959A3/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Withdrawn legal-status Critical Current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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0027—Varying behaviour or the very pump
    • F04D15/0038—Varying behaviour or the very pump by varying the effective cross-sectional area of flow through the rotor
    • 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
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/466—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid pumps
    • F04D29/468—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid pumps adjusting flow cross-section, otherwise than by using adjustable stator blades

Definitions

  • This invention relates to a pump for cooling circuits provided with a magnetic-actuated flow regulator.
  • this invention relates to a pump especially usable for allowing the circulation of a cooling fluid in internal combustion engines or fuel cells.
  • the dissipation of excess heat is usually obtained fitting the engine or the fuel cell with a cooling fluid circulation system.
  • the circulation of the aforesaid cooling fluids into the engine is obtained, in a preferred but non-limiting manner, using mechanical, electro-mechanical or magnetic drive pumps that circulate the fluid and keep the component temperature at such a value as to ensure correct and safe operation thereof.
  • the mechanical pumps used for achieving the aforesaid purpose are characterised by an impeller keyed onto a shaft placed in rotation by a belt drive, pulley or the like connected to the engine.
  • the impeller In magnetic drive pumps, on the contrary, the impeller is placed in rotation by means of the magnetic field induced through a series of permanent magnets arranged in coaxial direction relative to the internal body.
  • the cooling fluid circulates continuously with a flow rate that is function of the number of revolutions per minute of the engine and as a consequence, the pump continues to operate even when this is not strictly necessary; for example, when the external temperature is quite low or very low, engine cooling is even counter-productive as regards optimal operation in steady conditions, control of consumptions and control of the emissions of burnt gases.
  • the object of this invention is to obviate the drawback mentioned hereinabove.
  • the object of this invention is to provide a pump for cooling circuits with magnetic-actuated flow regulator which allows actuating the cooling fluid circulation only when this is required by the temperature conditions reached by the engine components.
  • a further object of this invention is to provide a pump as defined above of the "fail-safe" type, that is, such as to ensure correct operation of the pump itself even in the case of malfunction or fault.
  • a further object of this invention is to provide the users with a magnetic drive pump for cooling circuits suitable for ensuring high level of resistance and reliability over time, which allows to be quickly and easily to assembled and also such as to be easily and inexpensively constructed.
  • the pump for engine cooling circuits with magnetic-actuated flow regulator of the invention is composed of an impeller 12 known per se and keyed, by means of a bush 13 or in other known manner, to the bottom end of a rotation shaft 14, preferably with differentiated diameters.
  • Said shaft is connected, through a hub 16 fixed at the top end of the rotation shaft itself and on the opposite side relative to that of fixing of the impeller 12, to a pulley (not shown in the figure) or to an equivalent means suitable for transmitting the rotary motion to the shaft.
  • the rotation shaft 14 is turnably arranged relative to a container body 18, advantageously made by fusion of aluminium alloy or other suitable material and suitable for allowing the steady and safe fixing of the pump relative to the internal combustion engine or to the fuel cell.
  • the rotation shaft 14 is supported in the movement thereof into the container body 18 by one or more bearings or brasses 20 arranged inside the container body 18 and coaxially to the rotation shaft 14.
  • a shaped element 24 is arranged in the region comprised between the impeller 12 and the bottom front, facing the direction of the impeller itself, of the container body 18.
  • Said shaped element 24 made of sheet metal or moulded plastic or other suitable material, comprises:
  • the appendices of the top portion 24" of the shaped element 24 insert into the chamber 19 of the container body and preferably have an "S" shaped profile; said appendices are sliding in axial direction into the chamber 19 according to the methods described hereinafter.
  • a sleeve 26 is fixed to the container body 18 at the central portion thereof and is inserted into the chamber 19 of the container body 18; said sleeve 26 has a flange or edge 26' suitable for defining a stop to the sliding, into the chamber 17, of the appendices of the top portion 24" of the shaped element 24.
  • a first magnetic ring 28 made in a single piece preferably of plastic neodymium, neodymium-iron-boron (NdFeB) or other equivalent and known material is fixed, by means of a joint, by gluing or other known manner, at the top end of the shaped appendices of the top portion 24" of the shaped element 24.
  • the first magnetic ring 28 may be defined by a plurality of magnetic blocks preferably inserted in a metal beam and fixed in a known manner to the top side of the appendices of the top portion 24".
  • the chamber 17 is closed underside, at the bottom of the container body 18 facing the direction of the impeller 12 of the pump, by means of an annular cap 30 partly inserted into the chamber 17.
  • Two or more seals 32 that define static seals, ensure the seal of the annular cap 30 and prevent the infiltration of fluid into the chamber 17 of the container body 18.
  • An elastic means for example a helical spring 34, whose function will be explained hereinafter, is inserted into the chamber 17.
  • the helical spring supports an annular element 36, made of metal or plastic or other known material, from whose top front facing the direction opposite the annular cap 30 at least one optional lip 38 develops in vertical direction, extending in a continuous or partial manner, along the entire circumference of the annular element 36.
  • the aforesaid annular element 36 has a section basically shaped as an "H" with two grooves into each whereof one or more rings 37 are received, preferably made of Teflon, which ensure the seal and help the movement of the annular element itself into the chamber 17.
  • the annular element 36 together with the lip 38 defines the support for a second magnetic ring 40 made, like the first magnetic ring 28, in a single piece and of plastic neodymium, neodymium-iron-boron (NdFeB) or other equivalent and known material.
  • a second magnetic ring 40 made, like the first magnetic ring 28, in a single piece and of plastic neodymium, neodymium-iron-boron (NdFeB) or other equivalent and known material.
  • the second magnetic ring 40 may be defined by a plurality of magnetic blocks, preferably inserted in a metal beam , relative to the annular element 36 and the at least one optional lip 38.
  • FIGS. 4 , 5 and 6 schematically show the pump for engine cooling circuits with magnetic-actuated flow regulator of the invention according to an embodiment alternative to the preferred one said alternative embodiment is indicated by reference numeral 10'.
  • the container body 18 externally and concentrically to the central part suitable for receiving the rotation shaft 14, defines two concentric chambers 17' and 19', of the annular type, extending in axial direction and open at the bottom front of the container body 18 facing the direction of the impeller 12.
  • Said cylindrical body 50 is partly inserted into the chamber 17' and slidingly arranged in axial direction relative to the same according to the methods described hereinafter.
  • At least a first magnetic ring 52 made, like those described before with reference to the preferred embodiment, of plastic neodymium, neodymium-iron-boron (NdFeB) or other equivalent and known material, is fixed in a known manner on the inner side surface of said cylindrical body 50 and at the top portion thereof, facing the direction of the bottom of the chamber 17'; said first magnetic ring is made in a single piece or is defined by a plurality of magnetic blocks, preferably inserted in a metal frame, fixed to the side surface of the cylindrical body 50.
  • NdFeB neodymium-iron-boron
  • the chamber 19' is closed underside, at the bottom of the container body 18 facing the direction of the impeller 12, by means of an annular cap 30" partly inserted into the chamber itself.
  • Two or more seals 54, defining seals, ensure the seal of the annular cap 30' and prevent the infiltration of cooling fluid into the chamber 19' of the container body 18.
  • an elastic means for example at least one helical spring 56, whose function shall be explained hereinafter, is inserted into the chamber 19'.
  • the helical spring supports an annular element 58, made of metal or plastic or other known material, from whose top front facing the direction opposite the annular cap 30' at least one optional lip 60 develops in vertical direction, extending in a continuous or partial manner, along the entire circumference of the annular element 58.
  • the aforesaid annular element 58 has the same structural features as the annular element 36 of the preferred embodiment and for this reason it is not subject of a detailed description; one or more rings 62, similar to rings 37, which ensure the seal and help the movement of the annular element itself into the chamber 19', are inserted into each of the grooves of the annular element 58.
  • the annular element 58 together with the optional lip 62 defines the support for at least a second magnetic ring 64 made, like the first magnetic ring 52, in a single piece and of plastic neodymium, neodymium-iron-boron (NdFeB) or other equivalent and known material.
  • a second magnetic ring 64 made, like the first magnetic ring 52, in a single piece and of plastic neodymium, neodymium-iron-boron (NdFeB) or other equivalent and known material.
  • first magnetic ring 52 also the second magnetic ring 64 may be defined by a plurality of magnetic blocks, preferably inserted in a metal frame, relative to the annular element 58 and the at least one optional lip 60.
  • the pump for engine cooling circuits of the invention is preferably connected to a pneumatic supply circuit (not shown in the figure) suitable for actuating, by drawing air into the chamber 17 or 19' of the container body 18, the movement according to the methods discussed hereinafter; as an alternative, the movement may also be actuated by hydraulic, mechanical or electromagnetic drives, or other known type.
  • a pneumatic supply circuit (not shown in the figure) suitable for actuating, by drawing air into the chamber 17 or 19' of the container body 18, the movement according to the methods discussed hereinafter; as an alternative, the movement may also be actuated by hydraulic, mechanical or electromagnetic drives, or other known type.
  • axial movement means such as for example a pneumatic supply circuit for the axial movement of the shaped element 24, or respectively of the cylindrical body 50, which by drawing air into the chamber 17 or 19' of the container body 18, actuates the axial movement of said elements, or hydraulic, mechanical, electromagnetic drives or other known type.
  • Figure 2 shows the final "on” condition of the pump, that is, the condition wherein, with the impeller 12 in rotation, the cooling fluid circulates into the circuit.
  • the bottom portion 24' of the shaped element 24 is not in contact with the volute (the body that surrounds the impeller 12 of the pump and not shown in the figure) of the pump basement; as schematised in figure 2 , the top front of the bottom element 24' is in contact with the bottom front of the annular cap 30; starting from the configuration whereof at figure 2 , the pneumatic supply circuit draws air from the chamber 17 (by means of the pneumatic supply circuit) of the container body 18 and then, the helical spring 34 is in the condition of maximum compression into the chamber 17 itself (see figure 1 ).
  • the impeller 12 is actuated by means of the pulley or another motion driving means and allows the circulation of the cooling fluid.
  • the downwards movement of the shaped element 24 interrupts when it contacts the volute of the pump basement.
  • the bottom portion 24' of the shaped element 24 is thereby fitted onto the impeller 12 and in contact with the top front of the same.
  • FIG 5 shows the "on" condition of the pump of the invention according to the alternative embodiment; the impeller 12 is already in rotation and the cooling fluid circulates into the circuit as already mentioned before.
  • the pump then moves to the "off" configuration schematised in figure 4 wherein the cylindrical body 50 closes the volute of the pump base thus preventing the fluid circulation.
  • the pump for engine cooling circuits of the invention by the effect of the alternating up/down movement of the shaped element 24 enables/disables the supply of cooling fluid keeping the impeller itself always in rotation.
  • a further advantage is represented by the fact that varying the position of the annular element 36 and 58 into the chamber 17 and 19' it is possible to "choke" the cooling fluid supply according to the specific needs.
  • a further advantage of the pump of the invention is represented by the fact that it defines a "fail- safe" device suitable for ensuring the pump operation even in conditions of malfunction or failure; in fact, with particular reference to the preferred embodiment, if the pneumatic supply fails, the helical spring 34 moves to rest condition, that is, fully extended into the chamber 17 of the container body 18 and the pump is in the "off" configuration described above and schematised at figure 2 .
  • a further advantage of the pump of the invention is represented by the fact that it allows eliminating the dynamic mechanical seals that in the long term may cause breakage and malfunctions.
  • a further advantage is the fact that the pump of the invention is simple and inexpensive to construct, and its components are quick and easy to replace in the case of maintenance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Magnetically Actuated Valves (AREA)
EP08004757.4A 2007-10-29 2008-03-14 Pompe pour circuits de refroidissement de moteur avec régulateur de flux actionné magnétiquement Withdrawn EP2055959A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT002078A ITMI20072078A1 (it) 2007-10-29 2007-10-29 Pompa per circuiti di raffreddamento motore con regolatore di portata ad azionamento magnetico

Publications (2)

Publication Number Publication Date
EP2055959A2 true EP2055959A2 (fr) 2009-05-06
EP2055959A3 EP2055959A3 (fr) 2015-09-30

Family

ID=40313887

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08004757.4A Withdrawn EP2055959A3 (fr) 2007-10-29 2008-03-14 Pompe pour circuits de refroidissement de moteur avec régulateur de flux actionné magnétiquement

Country Status (2)

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EP (1) EP2055959A3 (fr)
IT (1) ITMI20072078A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103277343A (zh) * 2013-06-26 2013-09-04 长城汽车股份有限公司 车辆内燃机冷却系统用水泵

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9200240U1 (de) * 1992-01-11 1992-02-27 Kultscher, Armin Henry, 3300 Braunschweig Variable Strömungsmaschine
DE10235721B4 (de) * 2002-08-03 2006-06-29 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Merbelsrod Regelbare Kühlmittelpumpe
DE102004054637B4 (de) * 2004-11-12 2007-04-26 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Regelbare Kühlmittelpumpe
DE102005004315B4 (de) * 2005-01-31 2007-04-26 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Regelbare Kühlmittelpumpe
JP2007138717A (ja) * 2005-11-14 2007-06-07 Aisin Seiki Co Ltd ウォータポンプ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103277343A (zh) * 2013-06-26 2013-09-04 长城汽车股份有限公司 车辆内燃机冷却系统用水泵
CN103277343B (zh) * 2013-06-26 2015-12-02 长城汽车股份有限公司 车辆内燃机冷却系统用水泵

Also Published As

Publication number Publication date
EP2055959A3 (fr) 2015-09-30
ITMI20072078A1 (it) 2009-04-30

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