EP0428920A1 - Refroidisseur d'huile - Google Patents

Refroidisseur d'huile Download PDF

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Publication number
EP0428920A1
EP0428920A1 EP90120967A EP90120967A EP0428920A1 EP 0428920 A1 EP0428920 A1 EP 0428920A1 EP 90120967 A EP90120967 A EP 90120967A EP 90120967 A EP90120967 A EP 90120967A EP 0428920 A1 EP0428920 A1 EP 0428920A1
Authority
EP
European Patent Office
Prior art keywords
oil
oil cooler
cooler according
opening
partition
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
EP90120967A
Other languages
German (de)
English (en)
Other versions
EP0428920B1 (fr
Inventor
Horst Armbruster
Hans Dipl.-Ing. Martin
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.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
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 Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP0428920A1 publication Critical patent/EP0428920A1/fr
Application granted granted Critical
Publication of EP0428920B1 publication Critical patent/EP0428920B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates

Definitions

  • the invention relates to an oil cooler with a finned tube block through which cooling fluid flows, which is inserted into a housing chamber through which oil flows, with an inlet and an outlet opening for the oil, and which consists of a multiplicity of parallel tubes which are essentially perpendicular to their longitudinal direction running and rinsed by the continuous ribs are interconnected.
  • Oil coolers of this type are known (DE-PS 34 40 064). They have the advantage that they can be produced if necessary without soldering or welding, that they have a simple, compact design and that the water flow through the parallel pipes is precisely defined.
  • the oil to be cooled flows into the front openings of the housing, leaves the housing on the opposite end and can then be conveyed back to the motor through the center of the housing through an oil filter.
  • the duration of the oil to be cooled in the oil cooler is relatively short with these types.
  • the invention has for its object to design oil coolers of this type in a simple manner so that the residence time of the inflowing oil in the heat exchange chamber is greater, so that also an increase in performance is possible without a large additional space requirement.
  • the housing wall having the inlet opening for the oil there is a partition wall extending into the housing chamber for guiding the oil flow and that the outlet opening for the oil is arranged on the side of the partition wall facing away from the inlet opening.
  • bypass channel can be provided with a valve which can be controlled in a temperature-dependent or pressure-dependent manner according to subclaims 16 and 17 and closes or releases the bypass channel.
  • an oil cooler with a housing (1) with two mutually parallel end faces (1a and 1b) is shown, through which a housing chamber (2) is formed, in which a finned tube block (3) is used as a heat exchanger , which is composed of several tubes (4) running parallel to one another with ribs (5) extending perpendicular to the tube axes, which are arranged in a lamella-like manner along the tubes and enclose all tubes.
  • the ends of the tubes (4) are inserted tightly in tube sheets (6) which delimit the housing chamber (2) on two sides.
  • the upper and lower tube sheets are each closed by water boxes (7 and 8), which each form flow spaces for the cooling liquid, which for example through one of the connectors (9) attached to the water box (8) and through the other connector (10) again drains away.
  • the water tank (8) is provided with a wall attachment (11) between the two nozzles (9 and 10) which bears against the associated tube sheet (6).
  • the water box (7) does not have such a wall. In it, the deflection of the amount of coolant flowing in through the nozzle (9) takes place from the left wing, which is designed as a partial block of the finned tube block (FIG. 1), to the right partial block wing, which is shown partially broken away. To this extent, this configuration and arrangement of the finned tube block corresponds to the known oil cooler.
  • the oil to be cooled by the coolant is supplied and removed through the inlet opening (12) in the direction of the arrows (14) of FIG. 2 into the housing chamber (2).
  • the inflow opening (12) faces the viewer on the front face.
  • the flow of the incoming oil is through a partition wall assigned to the left wing (3a) of the finned tube block (3) and shown in broken lines in FIG. 1 (15) from the end face (1a) to approximately in the vicinity of the end wall (1b).
  • the partition (15) leaves the window-like opening (16) shown on the right in FIG. 2 open because the free edge (15a) of the partition (15) does not extend continuously to the end face (1b).
  • the free flow cross section in the separating space (26) can advantageously be chosen larger than the flow cross section of the window-like openings (16), which in turn should be at least as large as the inlet cross section of the inflow opening (12). In this way, the pressure loss of the oil flowing through the deflection can be kept negligible.
  • the sleeve (18) could also, as shown in Fig. 5, have a rectangular or square cross section.
  • the partitions (15 and 17) are sealingly attached to it.
  • the oil deflected on the end face (1b) therefore enters the space between the two partition walls (15 and 17) and is deflected - in FIG. 1 - above and below the sleeve (18) towards the viewer until it reaches the proximity of the end face (1a) comes.
  • the oil therefore enters from the end face (1a) into the wing (3b) of the finned tube block (3) and flows - seen in FIG. 1 - downwards from the observer to the drain opening (19) for the oil which is at the End face (1b) of the housing chamber (2) is arranged.
  • the oil leaves the oil cooler in the direction of the arrows (20) in FIG. 3.
  • Fig. 4 shows schematically the flow of the oil through the two wings (3a and 3b) of the finned tube block, the schematic deflection of the oil represented by the arrow (21) not being cut in the cylindrical space within Fig. 4 sleeve (18) , but takes place in the space below and above this sleeve in the direction of arrow (21).
  • the oil to be cooled is forced to travel twice in the housing chamber for heat exchange compared to oil coolers according to the prior art. This increases the cooling capacity of the oil cooler. Since the housing for the cooler can also be completely soldered, oil coolers of this type can also be used at higher operating pressures. As a result, the oil throughput per unit area can be increased.
  • FIG. 5 shows a type of oil cooler, which is similar to FIG. 1. However, it is different that the housing dimensions on the inlet side of the water, in the housing space assigned to the inlet connection (9 ') and therefore with respect to the wing (3a) of the finned tube block, are larger than for the wing (3b), through which the water from the return nozzle (10 ′) arrives.
  • the oil inflow can be selected here so that the still hot oil is first fed to the larger wing (3a) of the finned tube block and only then is deflected to the other side.
  • the mounting opening (18 ') surrounded by a sleeve-like tube (22) with a square cross-section.
  • This tube is connected to the outside by two U-shaped profiles (23 and 24) bridging the distance between the tube sheet (6) and tube (22), which in this embodiment therefore together with the webs (23a and 24a) aligned sides of the tube (22) form the respective partitions (15 and 17) of the embodiment of FIGS. 1 to 4.
  • the windows (16) can each be formed by punching out the profile parts (23 or 24).
  • This embodiment also opens up the possibility, for example, of arranging a valve (25) in the part of the tube (22) lying between the two profiles (23 and 24), which opens up the possibility of the oil to be cooled already after flowing through the first wing of the finned tube block or - with a corresponding arrangement of the overflow window (16) - only after flowing through the second wing into the central opening (18 ') and from there directly return to the engine.
  • the oil can be deflected several times within the heat exchange space.
  • a bypass channel (27) in the form of a tube is used on one side in the separating space (26 ') formed on both sides of the sleeve (18') by the profiles (24) , which closes tightly with the housing wall with its two ends.
  • a valve (25) in the form of a bimetallic strip which lies tightly on the opening of the tube and makes the bypass channel (27) ineffective in this position.
  • the bimetallic strip (25) can be designed such that it bends outwards below a certain temperature of the oil surrounding it and thus releases the direct flow path for oil from an engine (not shown) to the filter or vice versa. This has the advantage that very cold oil, for example when the engine is started in winter, goes directly through the bypass channel to Motor can flow and is not prevented from this flow by the resistance of the finned tube block.
  • bypass channel (27) instead of the bimetallic strip (25), it would also be conceivable to provide a pressure-dependent control valve for closing the bypass channel (27), which serves the same purpose and yields when the oil pressure is too high, which can be very tough when cold, and that releases direct flow through the bypass channel (27).
  • bypass channel (27) directly as a throttle element in such a way that only a certain minimum amount of the oil runs through it, but which is also greater when the oil is more viscous than with a hot, low-viscosity oil.
EP90120967A 1989-11-17 1990-11-01 Refroidisseur d'huile Expired - Lifetime EP0428920B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3938254 1989-11-17
DE3938254A DE3938254A1 (de) 1989-11-17 1989-11-17 Oelkuehler

Publications (2)

Publication Number Publication Date
EP0428920A1 true EP0428920A1 (fr) 1991-05-29
EP0428920B1 EP0428920B1 (fr) 1993-09-29

Family

ID=6393741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90120967A Expired - Lifetime EP0428920B1 (fr) 1989-11-17 1990-11-01 Refroidisseur d'huile

Country Status (2)

Country Link
EP (1) EP0428920B1 (fr)
DE (2) DE3938254A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19510847C2 (de) * 1995-03-17 2002-11-21 Michael Rehberg Plattenwärmetauscher
DE19723422C1 (de) * 1997-06-04 1998-12-10 Siemens Ag Verfahren und Vorrichtung zur Erkennung und Korrektur eines gesättigten Stromverlaufs eines Stromwandlers

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1066418A (fr) * 1952-11-10 1954-06-04 Chausson Usines Sa échangeur thermique en particulier pour aéronefs et applications malogues
FR65106E (fr) * 1953-12-31 1956-01-26 Chausson Usines Sa échangeur thermique en particulier pour aéronefs et applications analogues
FR1565980A (fr) * 1967-05-24 1969-05-02
EP0120497A2 (fr) * 1983-03-28 1984-10-03 Tui Industries Echangeur de chaleur à enveloppe et tubes
FR2591728A1 (fr) * 1985-12-13 1987-06-19 Renault Vehicules Ind Echangeur thermique, notamment pour moteur a combustion interne

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1020213B (de) * 1955-08-11 1957-11-28 Motoren Werke Mannheim Ag OElkuehler fuer Verbrennungskraftmaschinen
DE3440064A1 (de) * 1984-11-02 1986-05-07 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Oelkuehler

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1066418A (fr) * 1952-11-10 1954-06-04 Chausson Usines Sa échangeur thermique en particulier pour aéronefs et applications malogues
FR65106E (fr) * 1953-12-31 1956-01-26 Chausson Usines Sa échangeur thermique en particulier pour aéronefs et applications analogues
FR1565980A (fr) * 1967-05-24 1969-05-02
EP0120497A2 (fr) * 1983-03-28 1984-10-03 Tui Industries Echangeur de chaleur à enveloppe et tubes
FR2591728A1 (fr) * 1985-12-13 1987-06-19 Renault Vehicules Ind Echangeur thermique, notamment pour moteur a combustion interne

Also Published As

Publication number Publication date
DE3938254A1 (de) 1991-05-23
EP0428920B1 (fr) 1993-09-29
DE59002927D1 (de) 1993-11-04

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