EP2551484A1 - Pneumatisch betätigte Kühlpumpe - Google Patents

Pneumatisch betätigte Kühlpumpe Download PDF

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Publication number
EP2551484A1
EP2551484A1 EP12005234A EP12005234A EP2551484A1 EP 2551484 A1 EP2551484 A1 EP 2551484A1 EP 12005234 A EP12005234 A EP 12005234A EP 12005234 A EP12005234 A EP 12005234A EP 2551484 A1 EP2551484 A1 EP 2551484A1
Authority
EP
European Patent Office
Prior art keywords
containment body
annular cavity
ring
respect
axial
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.)
Granted
Application number
EP12005234A
Other languages
English (en)
French (fr)
Other versions
EP2551484B1 (de
Inventor
Stefano Vaccari
Riccardo Roveglia
Giulio Tanghetti
Donato Manenti
Luca Armellin
Sergio Metelli
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 EP2551484A1 publication Critical patent/EP2551484A1/de
Application granted granted Critical
Publication of EP2551484B1 publication Critical patent/EP2551484B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements
    • 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
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0022—Control, e.g. regulation, of pumps, pumping installations or systems by using valves throttling valves or valves varying the pump inlet opening or the outlet opening
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • 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
    • F05D2270/00—Control
    • F05D2270/60—Control system actuates means
    • F05D2270/65—Pneumatic actuators

Definitions

  • the present invention refers to a pneumatically-operated cooling pump.
  • the present invention refers to a cooling pump preferably used for conveying and circulating coolants, including but not limited to, inside internal combustion engines.
  • the engine has a system suitable for guaranteeing the circulation of coolants such as to maintain a temperature suitable for the correct and long-lasting operation of the engine.
  • the types of pumps used for the purpose are numerous and different in terms of construction characteristics and as regards the way they operate (mechanical pumps, electromechanical pumps, magnetic-drive pumps).
  • Such and known types of pumps are characterised by the presence of an impeller keyed on a shaft placed in rotation by means of a belt drive, gear drive or the like (mechanical pumps) or the impeller is placed in rotation by means of a magnetic field induced through the use of permanent magnets coaxial with the rotation shaft of the impeller itself (magnetic drive pumps).
  • cooling pumps have been made equipped with a device for regulating the flow rate so as to allow the circulation of the coolant only when really required by the engine.
  • a cooling pump for internal combustion engines suitable for guaranteeing continuous operation (fail-safe) even in the case of unfortunate drawbacks and comprising a pump body, a rotation shaft to which an impeller is connected, an annular shutter positioned in the pump body and having a series of pins or pistons coupled with coaxial seals suitable for moving the annular shutter in the direction of the impeller to check the quantity of coolant.
  • the object of the present invention is to overcome the above drawbacks.
  • the object of the present invention is to provide a pump equipped with a device for regulating the flow rate operated pneumatically and exempt from the use of seals with sliding parts typically subject to wear and characterised by potential and unfortunate coolant leaks.
  • a further object of the present invention is to place at the disposal of users a pneumatically-operated cooling pump suitable for providing a high standard of strength and reliability over time and such, furthermore, to be easily and inexpensively made.
  • the pneumatically-operated cooling pump of the present invention which comprises a containment body placed above an underlying volute inside which a shutter is positioned which surrounds an impeller keyed on a rotation shaft, immersed in a fluid of water and glycol and suitable for putting said fluid in motion, the pump also comprising pneumatically-operated mechanical means with axial movement for operating the shutter and static seal means positioned to separate between the containment body and the underlying coolant and cooperating with said mechanical means for the movement of the shutter, the mechanical means and the static seals being housed in the containment body.
  • the pneumatically-operated cooling pump of the present invention indicated by 10 in the illustrations as a whole, comprises a containment body 12 closed at the top, preferably but not only, by a lid 14 stabilized to the top front of the containment body 12 by means of screws fitted in holes 13 or by calking, gluing or equivalent known retention means.
  • Said containment body 12 is stabilized with its bottom front, opposite to the top front, closed by the lid 14, to an underlying volute (not shown in the illustration) inside which a shutter is positioned which surrounds an impeller keyed on a rotation shaft (the shutter and the impeller are not shown in the illustration either); with said shutter which opens/closes the channel for the flow of cooling fluid (water and glycol) in which the impeller is immersed.
  • the containment body 12 is defined, preferably but not only, by a discoid base 16 which centrally develops, in a vertical direction and substantially starting with its top front, a portion 18 centrally provided with a blind annular cavity 20 formed starting from the top front of the portion 18 itself.
  • a discoid base 16 which centrally develops, in a vertical direction and substantially starting with its top front, a portion 18 centrally provided with a blind annular cavity 20 formed starting from the top front of the portion 18 itself.
  • Inside said annular cavity 20 are formed, starting from the bottom of the cavity and partially developed in this in the direction of the top front of the containment body 12, at least three bodies 22, arranged angularly at 120°, provided inside with an axial chamber 24 with differentiated diameters, the function of which will be explained below; said axial chamber 24 communicates at the top with the annular cavity 20 and at the bottom with the bottom of the containment body 12.
  • the annular cavity 20 circumscribes a central portion 26 of the portion 18 of the containment body 12 extended vertically in the direction of the top front 12' of the portion 18 of the mentioned containment body 12 and for a height corresponding to that of the same portion 18.
  • the central portion 26 has an axial hole 27 suitable for defining the seat for housing the shaft for the rotation of the underlying pump impeller.
  • a duct 29 is made communicating with the annular cavity 20; said duct is connected to a pneumatic supply system.
  • Further ducts 31 are made along the lateral surface of the portion 18 in a radial direction and in correspondence to each body 22; said further ducts put a specific portion of the axial chamber 24 in contact with the outside and, consequently, such chamber is in atmospheric pressure conditions.
  • annular cavity 20 is closed at the top by an annular seal 28, made of rubber or other known material with elastic characteristics and suitable for the purpose, wherein the flaps are in contact with the edges of the annular cavity 20.
  • the annular seal 28 fits partially into the annular cavity 20 with its vertical peripheral surfaces in contact with the perimeter surfaces of the annular cavity itself.
  • the section profile of the annular seal 28 has an undulated shape or "W" shape with a crest or dome 30 included between two parallel and opposite grooves 32.
  • the profile of the same annular seal 28 takes on a "U" type shape with a groove 34.
  • At least three possible guide pins 36 are arranged stabilized with one extremity with respect to a seat 38 formed on the bottom surface or base of the annular cavity 20.
  • a possible elastic element, defined by a helical spring 40, is fitted coaxially over each guide pin 36.
  • the assembly defined by the guide pin 36 and by the helical spring 40 is not present.
  • the annular cavity 20 defines the housing and axial movement seat of an actuator unit comprising a ring 42, coaxial with the annular cavity 20, coupled at the top with the seal 28 inside the crest 30 (in idle conditions) and comprising at least three circular cavities or seats 43 with respect to which are connected at the bottom at least three stems 44 arranged coaxially to each body 22 and partially sliding with respect to the axial chamber 24 of the bodies themselves.
  • an actuator unit comprising a ring 42, coaxial with the annular cavity 20, coupled at the top with the seal 28 inside the crest 30 (in idle conditions) and comprising at least three circular cavities or seats 43 with respect to which are connected at the bottom at least three stems 44 arranged coaxially to each body 22 and partially sliding with respect to the axial chamber 24 of the bodies themselves.
  • Each stem 44 consists of a first rod 46 protruding from the axial chamber 24 in the annular cavity 20 and stabilized, in correspondence to its upper extremity, in the round cavity or seat 43 of the ring 42 by means of an elastic retention ring 45, by a truncated-cone expansion 50 with a lower smaller-diameter portion or base turned in the direction of the bottom of the axial chamber 24 and in contact with a diaphragm 52, by a second rod 54 extending starting from the smaller-diameter portion or base of the truncated-cone expansion 50 which crosses the axial chamber 24 and is connected to the shutter (not shown in the illustration).
  • the diaphragm 52 is cup shaped with the outer lateral surface of the edge in correspondence to the lower open extremity of the diaphragm itself in contact with the lateral walls of the axial chamber 24; such diaphragm is blocked at the lateral surface of the axial chamber 24, in correspondence to its open extremity, by means of at least one shaped ring 53 placed in contact with the inner lateral surface of the seal 52 in correspondence to the open extremity of the seal itself, said at least one shaped ring 53 is, in turn, fastened to the lower portion of the cavity 24 by means of stop ring 61 or by other traditional and known means of retention.
  • At least one further stop ring 56 placed on the bottom of the diaphragm 52 on the opposite side compared to the open extremity, ensures a stable and safe coupling between the diaphragm itself and the second rod 54 of the stem 44 of the actuator unit.
  • the diaphragm 52 creates the static seal between the axial chamber 24 of the containment body 12 and the lower portion of the pump wherein water and glycol are present under pressure; said diaphragm, furthermore, cooperates with the up and down movement of the stems connected to the ring 42 of the actuator unit without this moving in any way with respect to its housing seat.
  • the first rod 46 of each stem 44 is sliding with respect to a further seal 58 arranged inside the axial chamber 24 in correspondence to the upper greater-diameter portion or base of the truncated-cone expansion 50 of the stem 44 and to a bush 60 of the flanged type arranged above the further seal 58 and outside the axial chamber 24.
  • the upper extremity of the elastic element or helical spring 40 (if fitted) is engaged in contact with the bottom front of the ring 42 of the actuator unit which, in the configuration shown in figure 1 or idle configuration, is shown fitted inside the crest 30 of the annular seal 28.
  • the pump impeller In non-operating or idle conditions, when the shutter is open and does not prevent the fluid from accessing the volute, the pump impeller is in rotation, causing the circulation of the coolant inside the cooling circuit; the device of the invention is in the configuration shown in figure 1 .
  • the air supply circuit takes air from the annular cavity 20 through the duct 29 creating a vacuum inside the annular cavity 20 and, consequently, the annular diaphragm 28 is deformed with the crest 30 which drops adding onto the grooves 32 and defining a single groove 34. Due to the effect of such deformation the ring 42 of the actuator unit is moved by axial sliding inside the annular cavity 20 causing the stems 44 to slide coaxially to the axial chamber 24, the truncated-cone expansion 50 of each stem 44 presses on the diaphragm 52 causing a downward deformation of the closed bottom of same, as schematized in the figure 2 .
  • the elastic elements or return-action springs 40 and, consequently, the guide pins 36 are not present; the return action or axial sliding reversal of the ring 42 and of the stems 44 of the actuator unit is defined by the pressure of the liquid in the part below the containment body 12 applied on the diaphragm 52.
  • the pneumatically-operated cooling pump of the invention advantageously allows separating the portion of the pump immersed in the fluid (water and glycol) and the portion immersed in air, by means of the use of static seals.
  • a further advantage is the fact that the pump of the invention uses static seals defined by the diaphragms 52; these define static seals which are not subject to relative movements during the sliding of the piston, and are not therefore subject to wear by sliding and provide the pump as a whole with a longer working life, without the risk of coolant leaks occurring.
  • a further advantage is represented by the fact that the pneumatically-operated pump of the invention allows enabling/disabling the supply of coolant to the circuit, while always maintaining the rotation of the pump impeller.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
EP12005234.5A 2011-07-25 2012-07-13 Pneumatisch betätigte Kühlpumpe Active EP2551484B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001379A ITMI20111379A1 (it) 2011-07-25 2011-07-25 Pompa di raffreddamento ad azionamento pneumatico

Publications (2)

Publication Number Publication Date
EP2551484A1 true EP2551484A1 (de) 2013-01-30
EP2551484B1 EP2551484B1 (de) 2014-12-10

Family

ID=44545827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12005234.5A Active EP2551484B1 (de) 2011-07-25 2012-07-13 Pneumatisch betätigte Kühlpumpe

Country Status (3)

Country Link
EP (1) EP2551484B1 (de)
ES (1) ES2531162T3 (de)
IT (1) ITMI20111379A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2902631A1 (de) 2014-02-04 2015-08-05 METELLI S.p.A. Verstellbare kreiselpumpe mit einer hülse, die mittels eines dreh-translationssystems von geneigten flächen betätigt wird

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005062200B3 (de) 2005-12-23 2007-02-22 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Regelbare Kühlmittelpumpe
DE102007022189A1 (de) * 2007-05-11 2008-11-27 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Regelbare Kühlmittelpumpe
EP2299084A1 (de) * 2009-09-16 2011-03-23 Pierburg Pump Technology GmbH Mechanische Kühlpumpe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005062200B3 (de) 2005-12-23 2007-02-22 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Regelbare Kühlmittelpumpe
DE102007022189A1 (de) * 2007-05-11 2008-11-27 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Regelbare Kühlmittelpumpe
EP2299084A1 (de) * 2009-09-16 2011-03-23 Pierburg Pump Technology GmbH Mechanische Kühlpumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2902631A1 (de) 2014-02-04 2015-08-05 METELLI S.p.A. Verstellbare kreiselpumpe mit einer hülse, die mittels eines dreh-translationssystems von geneigten flächen betätigt wird

Also Published As

Publication number Publication date
ITMI20111379A1 (it) 2013-01-26
EP2551484B1 (de) 2014-12-10
ES2531162T3 (es) 2015-03-11

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