WO2015075591A1 - Groupe pompe de refroidissement réglable au moyen d'un élément de came - Google Patents

Groupe pompe de refroidissement réglable au moyen d'un élément de came Download PDF

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Publication number
WO2015075591A1
WO2015075591A1 PCT/IB2014/065737 IB2014065737W WO2015075591A1 WO 2015075591 A1 WO2015075591 A1 WO 2015075591A1 IB 2014065737 W IB2014065737 W IB 2014065737W WO 2015075591 A1 WO2015075591 A1 WO 2015075591A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump group
cam element
rotor
engagement
axis
Prior art date
Application number
PCT/IB2014/065737
Other languages
English (en)
Inventor
Rossano ZOBBIO
Original Assignee
Industrie Saleri Italo S.P.A.
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 S.P.A. filed Critical Industrie Saleri Italo S.P.A.
Priority to EP14809523.5A priority Critical patent/EP3071838A1/fr
Priority to DE112014005344.9T priority patent/DE112014005344T5/de
Publication of WO2015075591A1 publication Critical patent/WO2015075591A1/fr

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
    • 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

Definitions

  • the present invention relates to an adjustable cooling pump for a cooling circuit of an internal combustion engine and the cooling circuit comprising it.
  • adjustable pump groups are known of in which the flow of liquid is regulated by suitable regulation means for example by obstructing it fully or partially.
  • said adjustment means comprise an obturator member suitable to be placed between the rotor and the output channel of the pump group thereby obstructing the flow of liquid toward said output channel fully or partially.
  • said obturator members are suitable to be placed as needed in a closed position in which they obstruct the passage of cooling liquid towards the output channel and an open position in which the passage of cooling liquid is allowed.
  • the type of adjustment means and in particular the movement and adjustment of the positions of the obturator members is of particular importance in such pump groups for achieving effective and prompt adjustment of the circulation of the cooling liquid.
  • adjustment means for moving the obturator elements comprise pneumatic systems which use pressurised air or negative pressure air.
  • the pump groups of the prior art control the pressures and negative pressures by providing, inside the pump bodies thereof, special chambers where the air is suitable to be placed under pressure and negative pressure.
  • the purpose of the present invention is to provide an adjustable cooling pump group which resolves said drawbacks of the prior art; in other words the pump group according to the present invention is able to perform the movement of the obturator member by means of mechanical components avoiding the need to provide air-tight chambers inside the pump body and a pneumatic system for the movement of the obturator member inside the pump group .
  • FIG. 1 is a perspective view in separate parts showing the adjustable cooling pump which the present invention relates to, according to a possible embodiment
  • FIGS. 2a and 2b are two cross-sections of the pump group in figure 1, in which the obturator member comprised in said pump group is, respectively, in an open position and in a closed position;
  • FIGS. 3a and 3b are two perspective views of the pump group in figure 1 in which the obturator member comprised in said pump group is, respectively, in an open position and a closed position.
  • reference numeral 1 globally denotes an adjustable cooling pump group according to a preferred embodiment of the invention.
  • the adjustable cooling pump group 1 is suitable to place in circulation a predefined quantity of cooling liquid in a cooling circuit of an internal combustion engine, for example of a motor vehicle or motorcycle.
  • the adjustable cooling pump group 1 which the present invention relates to is suitable to regulate the passage of cooling liquid to the engine and in particular is suitable to move a predetermined quantity of liquid according to need; in other words, the cooling pump group 1 depending on the temperature of the cooling liquid and the functioning phase or status of the motor (for example, if this is in the starting phase, or if it is already fully operational) permits the adjustment of the quantity of cooling liquid in circulation.
  • 1 comprises a pump body 2 comprising upstream at least one input channel and downstream an output channel. From the input channel the cooling liquid enters the pump body
  • the pump group .1 further comprises a rotor 3, placed in a rotor chamber 20 made in the pump body 2 between said input channel and said output channel , suitable for moving said cooling liquid towards the output channel.
  • the rotor 3 is of the radial type, the input channel joins the radial rotor 3 at the front, namely aimed towards its centre of rotation while the output channel is positioned tangentially thereto.
  • the pump group 1 comprises a shaft 5 connected to said rotor 3 and suitable to move it in rotation around an axis X-X.
  • the rotor 3 is connected to one end of the shaft 5 while at the other end, the drive means are connected, for example a pulley and a belt and/or an electric motor (not shown) , or directly an electric motor with adjustable rotation (not shown) .
  • the pump 1, to regulate the flow towards the rotor 3, comprises adjustment means 10, suitable to adjust the flow of cooling liquid moved by the rotor 3 towards the output channel, in other words suitable to regulate the circulation of the cooling liquid in the cooling circuit, depending on the cooling requirements of the engine and/or preferably, depending on the temperature of the cooling liquid.
  • the adjustment means 10 comprise an obturator member 100, translatable along the axis X-X, between a closed position, in which it surrounds the rotor 3 and obstructs the passage of the cooling liquid to the output channel, and an open position, translated in relation to the closed position, in which it permits the passage of liquid.
  • the obturator member 100 is housed in the rotor chamber 20 and is suitable to translate inside it.
  • the rotor chamber 20 comprises an obturator member housing chamber 25, extending along the axis X-X, suitable to contain the obturator member 100 placed in the open position.
  • said rotor chamber 25 is placed on the opposite side to the input channel, for example, it is placed rearwards of the rotor 3.
  • the obturator member 100 is an axial-symmetric shape.
  • the obturator member 100 comprises a bottom wall 120 and a closure wall 110 which extends axially in height from said bottom wall 120 going to define a rotor housing 150 suitable for housing the rotor 3 when the obturator member 100 is placed in the closed position.
  • the obturator member 100 in the closed position, is suitable to contain within it the rotor 3 so as to place itself between the rotor 3 and output channel, in particular with its closure wall 110.
  • the obturator member 100 is suitable to be placed with . the closure wall 110 in a radial position between the rotor 3 and the output channel.
  • the obturator member 100 comprises a lip 125 which extends, preferably radially, outwardly, for example from the bottom wall 120.
  • the lip 125 is suitable, with the obturator member 100 in the closed position, to engage with an abutment 251 of the obturator member housing chamber 25 extending inside it.
  • the abutment 251 also extends radially, but inwards, i.e. towards the axis X-X.
  • the adjustment means 10 comprise a cam element 200 such that a movement thereof corresponds to said translation of the obturator member 100.
  • the cam element 200 is suitable to rotate and the rotation of the cam element 200 corresponds to the translation of the obturator member 100.
  • cam element 200 is housed in the pump body 2.
  • cam element 200 is positioned on the opposite side to the input channel, for example rearwards of the rotor 3, around the shaft 5.
  • the cam element 200 is suitable to engage the obturator member 100 on its bottom wall 120.
  • the pump body 2 comprises an adjustment cavity 28 suitable to house the cam element 200.
  • the adjustment cavity 28 is positioned along the axis X-X, on a side opposite the rotor chamber 20, in other words on the side opposite the input channel., in yet other words it is positioned behind the rotor 3.
  • said adjustment cavity 28 comprises at least one opening 281 to allow communication between the adjustment cavity 28 and the rotor chamber 20 and, possibly, the obturator member housing chamber 25, i.e. to permit the engagement between the cam element 200 and the obturator member 100.
  • the cam element 200 has an annular extension and has its centre on the axis X-X. [0042] Preferably, the cam element 200 extends by 360° and has its centre on the axis X-X.
  • the cam element 200 identifies within it a through cavity. inside which the shaft 5 is suitable to be housed.
  • the cam element 200 comprises a contoured engagement side 201, comprising at least one peak 210 and at least one valley 220, to engage the obturator member 100 and move it along the axis X-X.
  • the engagement side 201 comprises a plurality of peaks 210.
  • the peaks 210 are mutually angularly equidistant.
  • the peaks 210 are three in number.
  • the adjustment means 10 comprise engagement means 400, positioned between the cam element 200 and the obturator member 100 suitable to permit the reciprocal engagement between the cam element 200 and the obturator member 100.
  • the engagement means 400 are suitable to be positioned between the cam element 200 and the obturator member 100 and thus to transmit the movement of the cam element 200 to the obturator member 100 to obtain the aforementioned movements thereof.
  • the engagement means 400 are suitable to translate parallel to the axis X-X.
  • Said engagement means 400 are suitable to extend in height through the openings 281 of the adjustment cavity 28 and thus translate parallel to the axis X-X depending on the positioning of the cam element 200.
  • the engagement means 400 comprise at least one engagement pin 401 preferably attached to the obturator member 100 so that both translate in unison along the axis X-X when stressed by the movement, preferably as seen by the rotation, of the cam element 200.
  • the engagement pin 401 comprises an engagement end 411 suitable to engage the cam element 200, and in particular its engagement side 201.
  • the engagement end 411 of the pin 401 is thus stressed, depending on the position of the cam element 200, and is translated depending on the engagement of the engagement end 411 with the peaks 210 or the valleys 220.
  • the pin 401 extending astride the opening 281 presents the engagement end 411 placed in the adjustment cavity 28, while the other opposite . end, called the obturator end 412, is placed in the rotor chamber 20, preferably attached to the obturator member 100, preferably on its bottom wall 120.
  • the number of engagement pins 401 is the same as the number of peaks 210, so that each pin 401 is stressed by a respective peak 210.
  • the obturator member 100 is placed in the closed position. Unlike instead the configurations in which the engagement pins 401 engage or are engaged by the surfaces of the valleys 220, in which the obturator member 100 is thus ⁇ positioned in the open position.
  • the contour and the pattern of the engagement side 201 is constructed in such a way that a peak 210 projects from the valley 220.
  • the space inside the adjustment cavity 28 for the engagement means 400 proves smaller than the space which is instead present in the vicinity of the valley 220.
  • the adjustment means 400 comprise elastic means 402 acting on the engagement pin 401 to keep the obturator member 100 in an open position.
  • the elastic means 402 are suitable to act on the engagement pin 401 in such a way that, when this is not axially stressed by a peak 210, it is translated in the space inside the adjustment cavity 28 inside the valley 220.
  • each pin 401 an elastic means 402 such as a spring is placed.
  • the elastic means 402 are housed in the adjustment cavity 28.
  • the cam element 200 comprises, opposite the engagement side 201, a control side 202 manoeuvrable to place in movement, preferably in rotation, the cam element 200.
  • said rotation of the cam element 200 is made possible thanks to the presence of a bearing 250.
  • said bearing 250 is placed between the pump body 2 and the cam element 200 to permit the rotation of the cam element 200 in relation to the pump body 2.
  • the bearing 250 is also housed in the adjustment cavity 28.
  • the pump group 1 comprises actuation means 30 for moving the cam element 200.
  • the actuation means 30 comprise an actuation rod 300 linearly translatable upon command.
  • the cam element 200 comprises a projecting, control pin 222, connectable with said actuation rod 300; this way a translation of the actuation rod 300 corresponds to a movement of the cam element 200, for example a rotation around the axis X-X.
  • the pump group 1 comprises said actuation means 30 which are placed externally to the pump body 2, for example fixed to it On the outside.
  • the pump group 1 also comprises detection means sensitive to the temperature of the liquid and the actuation means 30 are operatively connected to said detection means so as to move the cam element and the obturator member according to the temperature detected.
  • the detection means are suitable to have at least a portion thereof in contact with the cooling liquid to be influenced by the temperature thereof .
  • the positioning of the obturator member 100 in a preferred position is controlled by the actuation means 30 through the direct action of the cam element 200 thus permitting, partialized or preventing the passage of the cooling liquid towards the output channel .
  • the actuation means comprise mechanical, electrical or pressure/negative pressure systems suitable to act on the actuation rod 300 and to move it transversely.
  • the present invention also relates to a cooling circuit of an internal combustion engine comprising an adjustable cooling pump group 1 according to the above description .
  • the pump group 1 further comprises special sealing elements, specifically suitable to prevent the leakage of cooling liquid from the rotor chamber 20.
  • a special seal is fitted on each opening 281 so as to minimise, or prevent the leakage of cooling liquid between the rotor chamber 20 and the adjustment cavity 28.
  • said leakage is in addition already limited by the engagement of the obturator member 100, for example with its lip 125, with the walls of said rotor chamber 20.
  • a membrane for example, elastically deformable, is housed, suitable to be placed between the cam element 200 and engagement means 400 so as to minimise, or prevent the leakage of the cooling liquid in said adjustment cavity 28 or, in some embodiments, outside it, thus retaining any cooling liquid which has leaked into it.
  • embodiments are also provided for in which more than one output channel is present inside the pump body 2 consequently the obturator member 100, in said embodiments is suitable to obstruct or partialize the flow of cooling liquid through said output channels.
  • the cooling pump group and cooling circuit to which it is applied are suitable to resolve the problems of the prior art mentioned above.
  • the regulation of the flow of liquid is not obtained by means of an obturator member moved by pressurised and negative pressure air, in that the movement of the obturator member is achieved mechanically.
  • the pump turns out to be extremely flexible, for example as regards its installation; in particular the pump group is suitable for fitting and being controlled in its configurations by a multiplicity of control systems and units.
  • the pump group is suitable to be connected to control systems and units of all types, where such systems and units must be suitable for controlling the movement of the cam element, for example moving said actuation rod: advantageously, regardless of the type of control systems and units, the obturator member is movable into said open and closed positions.
  • a further advantageous aspect consists of the fact that said control systems or units may be able to control the movement of the cam element and thus of the obturator member in a preferred intermediate position, between the closed position and the open position.
  • the interaction between the cam element and the obturator member permits an accurate movement and positioning of the obturator member even over time.
  • Another advantage is that the production of the pump body is extremely simplified.
  • a further advantage consists of the minimisation of leakage phenomena of the cooling liquid which instead typically afflict the solutions of the prior art.
  • a further advantageous aspect is the simplicity and economy of the pump group according to the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

L'invention concerne un groupe pompe de refroidissement réglable (1) pour un système de refroidissement d'un moteur à combustion interne comprenant un corps de pompe (2), un rotor (3) et un arbre (5) relié au rotor (3) apte à le déplacer en rotation autour d'un axe (X-X). Le groupe pompe (1) comprend des moyens de réglage (10) conçus pour régler la quantité de liquide déplacé par le rotor (3) comprenant : i) un élément d'obturation (100) pouvant effectuer une translation le long de l'axe (X-X), entre une position fermée, dans laquelle il entoure le rotor (3) et obstrue le passage du liquide de refroidissement, et une position ouverte, translatée par rapport à la position fermée, dans laquelle il permet le passage du liquide ; ii) un élément de came (200), logé dans le corps de pompe (2), de telle sorte que ladite translation de l'élément d'obturation (100) correspond à un déplacement de celui-ci.
PCT/IB2014/065737 2013-11-22 2014-10-31 Groupe pompe de refroidissement réglable au moyen d'un élément de came WO2015075591A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14809523.5A EP3071838A1 (fr) 2013-11-22 2014-10-31 Groupe pompe de refroidissement réglable au moyen d'un élément de came
DE112014005344.9T DE112014005344T5 (de) 2013-11-22 2014-10-31 Mittels Nockenelement einstellbare Kühlpumpengruppe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS2013A000174 2013-11-22
IT000174A ITBS20130174A1 (it) 2013-11-22 2013-11-22 Gruppo pompa di raffreddamento regolabile mediante un elemento a camma

Publications (1)

Publication Number Publication Date
WO2015075591A1 true WO2015075591A1 (fr) 2015-05-28

Family

ID=50001098

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2014/065737 WO2015075591A1 (fr) 2013-11-22 2014-10-31 Groupe pompe de refroidissement réglable au moyen d'un élément de came

Country Status (4)

Country Link
EP (1) EP3071838A1 (fr)
DE (1) DE112014005344T5 (fr)
IT (1) ITBS20130174A1 (fr)
WO (1) WO2015075591A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111417785A (zh) * 2017-09-18 2020-07-14 索格菲空气冷却公司 可变输送泵装置以及包括这种泵的回路

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008059462A1 (de) * 2007-12-03 2009-06-04 Tcg Unitech Systemtechnik Gmbh Radialpumpe
DE102008006451A1 (de) * 2008-01-29 2009-07-30 Audi Ag Kühlmittelpumpe mit integriertem Stellventil für einen Kühlkreislauf einer Brennkraftmaschine
DE102010010223A1 (de) * 2009-03-24 2010-09-30 Tcg Unitech Systemtechnik Gmbh Radialpumpe
DE102010025013A1 (de) * 2009-06-29 2011-01-05 Tcg Unitech Systemtechnik Gmbh Radialpumpe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008059462A1 (de) * 2007-12-03 2009-06-04 Tcg Unitech Systemtechnik Gmbh Radialpumpe
DE102008006451A1 (de) * 2008-01-29 2009-07-30 Audi Ag Kühlmittelpumpe mit integriertem Stellventil für einen Kühlkreislauf einer Brennkraftmaschine
DE102010010223A1 (de) * 2009-03-24 2010-09-30 Tcg Unitech Systemtechnik Gmbh Radialpumpe
DE102010025013A1 (de) * 2009-06-29 2011-01-05 Tcg Unitech Systemtechnik Gmbh Radialpumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111417785A (zh) * 2017-09-18 2020-07-14 索格菲空气冷却公司 可变输送泵装置以及包括这种泵的回路

Also Published As

Publication number Publication date
ITBS20130174A1 (it) 2015-05-23
EP3071838A1 (fr) 2016-09-28
DE112014005344T5 (de) 2018-04-12

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