US2397069A - Oil and jacket coolant heat exchanger - Google Patents

Description

March 19, 11946. F. YOUNG ET AL 2,397,069

OIL AND JACKET COOLANT HEAT EXCHANGER Filed Aug. 7, 1941 4 Sheets-Sheet 1 g INVENTORS.

w F250 MYou/ve W/LL/Am/Asmup March 19, 1946. F. M. YOUNG ET AL f fi fi OIL AND JACKET COOLANT HEAT EXCHANGER Filed Aug. 7, 1941 4 Sheets-Sheet 3 INVENTORS FRED /7. You/Ye WILL/AM VASTRUP 5r 3' I ATTORNEY F. M. YOUNG ETAL OIL AND JACKET GOOLANT HEAT EXCHANGER 4 Sheets-Sheet 4 Filed Aug. '7, 1941 INVENTORS. A250 M. YOU/Y6 W/LL/AM l/Asr u Patented Mar. 19, 1946 OIL AND JACKET COOLANT HEAT EXCHANGER Fred M. Young and William V. Astrup, Racine, Wis., assignors to Young Radiator Company, Racine, Wis., a company of Wisconsin Application August 7, 1941, Serial No. 405,783

3 Claims. (Cl. 257-236) The present invention relates to means for cooling the jacket coolant of an internal combustion engine and for cooling the lubricatin oil of the engine.

An object of the present invention is to provide a unitary heat exchanger having therein a single direct path for the cooling liquid in the form of two bundles of tubes in separate chambers through which the bundles of tubes extend, forming separate paths for the coolant and Inbricating oil.

An object of the present invention is to provide separate chambers for the oil and jacket fluid which are suitably secured' together so the jacket cooling part of the device can be manufactured and sold separately from the oil cooling part of the device or wherein the two may be secured together forming a single unit.

The principal object of the present invention is to provide compact and efficient means for cooling the jacket fluid and lubricating oil of an internal combustion engine, made possible because of the low temperature of cooling water and the high heat exchange capacity of the water when in contact with the tubes.

A further object of the present invention is to provide means whereby the device may be easily connected to the cooling and lubricating oil lines and to the cooling water supply.

An object of the present invention is to use a. coolant for the device which is much more eflicient than air and more uniform in temperature, thus to greatly reduce the size and increase the efiiciency of the device.

Generally stated, an important object of the invention is to make possible the successful use of any cooling water available, either salt water, water with considerable soil in suspension or water having considerable lime and the like.

Another object of the present invention is to provide a self-contained jacket coolant unit and an oil cooling unit, each of which may be separately manufactured and secured together forming a single assembly.

Another object 'of the present invention is to provide means whereby unequal expansion and contraction will not be harmful.

To these and other useful ends, our invention consists of parts, combinations of parts, or their equivalents, and mode of operation, as hereinafter set forth and claimed and shown in the accompanying drawings in which:

Fig. 1 is a side levational view of our device adapted for cooling the coolant of an internal combustion engine.

Fig. 2 is an end view of the device shown in Figure 1.

Fig. 3 is a side view of the core which is fractionally shown by dotted lines in Figures 1 and 2.

Fig. 4 is a partially sectioned end view of the core shown in Figure 3 and sectioned on line 4-4 of this figure.

Fig. 5 is a top view of the device shown in Figure 1 having attached thereto the oil cooling unit.

Fig. 6 is a side View of the device shown in Figure 5 with the major part of the housing of member A removed.

Fig. '7 is a side view of the coolant and oil cooling units secured together and illustrating a modification and showing the tubes and baffle plates by dotted "lines.

Fig. 8 is a fractional longitudinal section of a modification.

In Figures 1 through 6 we illustrate either by dotted or solid lines the preferred means to provide for unequal expansion and contraction between the tubes and the main housing. In Figures '7 and 8, the coolant tubes are, at the left ends, secured to a header plate and expansion and contraction is provided for in a special connection on the right end of the core, all of which will hereinafter be described.

Referring specifically to Figures 1 through 6. The housing of the coolant cooling device is designated in its entirety by reference character A. The inlet header cap for the housing is designated in its entirety by reference character B. The right hand header cap for member A is designated in its entirety by reference character C. The core in member A is designated in its entirety by reference character D.

Housing or shell A is shaped as illustrated in Figures 1 and 2 having an upwardly extending liquid level chamber [0 with a filler cap H, the filler cap being secured in the usual manner to a projection I2 on member l0. As is the custom in automotive radiators, member If! may be considered the inlet header of the unit and the water level in this unit is expected to be kept somewhat below the overflow outlet which is provided with drain tube l3.

Core D (see Figure 3) comprises a large number of closely spaced tubes I4, the ends being extended through a tube plate [5. We provide a header for the other ends of tubes it having a tube plate IS with an outwardly extending flange H, the tube extending through plate l6 and being suitably bonded thereto.

A header cap 18 is provided (see Figure 3) having a flange I 9 adaptedto flt into flange l1 and being bonded or welded thereto as at 28. Thus a complete header is provided, forming an inlet to tubes l4, member l8 having secured on its inner side a bracket 2|, the bracket having an opening 22 which registers with an opening 23 in member l8.

Member I8 is suitably bonded to member 2| which is suitably shaped for screw threaded openings '24 (see Figure 3). Members A and B are provided with adjacent surfaces suitable for a gasket 25. Member B is suitably held to member A by a number of bolts 26 and being provided with an opening 21 which registers with the opening 23 in member "I8.

Member B is provided with apertures which register with screw threaded openings 24 in member 2|. openings 24 and slidably extend through the openings in member B and are adapted to act as fasteners for an inlet connection. n the inner side of member B we provide a raised surface 28 adapted to flt on the outer surface of member l8 directly over member 2| and we provide a suitable gasket between members l8 and 28 whereby studs 24' may act to hold members l8 and 28 against the gasket forming a leak proof joint. It will be seen that the cooling medium may enter inlet 21 and pass into the header from whence it may flow through tubes l4.

It will be noted that bracket 2| is spaced a distance from flange I9 so member 8 will permit a limited endwise movement of the header relative to member B and provide for manufacturing and gasket variations.

A gasket 35 is provided between tube plate l and the end of member A and another gasket 35 is positioned between members l6 and member C and the assembly held together by means of bolts 36. Header cap C is provided with an outlet opening 31 which is preferably supplied with a suitable surface for making a flanged connection to the outlet pipe and header cap B is supplied with a similar surface for a flanged connection for the inlet pipe. Thus it will be seen that member 8 is flexibl enough to provide for independent expansion and contraction of the bundle of tubes D, the bundle being shaped to loosely fill the space within member A.

Member A has side walls 38-38, a bottom wall 39' and preferably a partition 39.

A plate 40 is positioned on the top row of tubes and secured at its ends to members l5 and I6, one end being slidable so it may expand and contract independent of the tubes. The edges of this plate and a similar bottom plate 46 are bent as illustrated forming flanges 4|-4|; flanged openings 42 are provided near the ends of these plates as illustrated.

We provide a synthetic rubber washer 44 which fits over the flange of opening 42 and is thick enough so when core D is raised high enough so the bolt openings in members l5 and B register, the washer is compressed so as to form a liquid tight joint between members 39 and 46. Thus a connection is formed between the chamber in member I6 and the top of the core.

The side walls of member A near their tops and bottoms are provided with inward projections 45 (se dotted lines in Figure 2). These projections face each other and are spaced apart so flanges 4| at their edges are yieldingly held in contact therewith. The sides of core D are Studs 24 are screw threaded into plates 46 and being provided with alternately.

positioned passageways 48. Clearly the engine coolant will pass from opening 42 sinuously between the tubes as indicated by dotted arrows in Figure 1. We provide another plate which is secured to the bottom row of tubes but reversed end .for end so opening 42 completes the sinuous path through the bank of tubes and forms an outlet from the bank of tubes adjacent outlet 5| in the shell.

We provide an outlet in the bottom of member A as at 5| having means for a flanged connection to which the outlet pipe may be secured. An inlet connection 52 is provided in the left rear side of member III also having means for a flanged connection (see dotted lines in Figure 1). Thus it will be seen that the coolant may enter at 52, pass through chamber In as a header and then down through the core sinuously to outlet 5| from whence the coolant is returned to the engine jackets.

It will be seen that the cooling water passing through the tubes will act to cool the engine coolant and the device as illustrated in Figures 1 and 2 will act very similar to an automobile or truck radiator except that instead of a blast of air being used for the cooling medium, water is used for the purpose. However, because of the more uniform temperature of the cooling water and its high heatconductivity capacity, the device will be much smaller than the ordinary air cooled radiator.

Clearly core D can be easily removed and replaced and access to the tubes and the interior of the housing is provided for inspection or cleaning.

Referring now to Figures 5 and 6, it'will be noted that an oil cooling unit which is designated by reference character E is secured to the right hand end of member A in place of header C. Member E comprises a rectangular chamber having end flanges 6| and 62. Flange 6| is adapted to lie on member I 5 with a gasket 35 intervening and member E is fastened and sealed to member A by bolts 36. Header C is then secured to flanges 62 by means of a gasket 35 and bolts 63.

We provide tube plates 64-64 which are secured to the inner surface of the walls of member E by welding or otherwise as at 65 (also shown in Figure '1). We provide a large number of tubes 66 which extend through tube plates 64 as clearly illustrated by dotted lines in Figures 6 and 7. It will be seen that the cooling water discharged ,from tubes l4 enters the space formed by adjacent tube plates i5 and 64 from whence it will flow through tubes 66 and into the space formed by header C and be discharged through outlet 31. Clearly the bundle of tubes 66 will be cooled by the cooling water after it passes through core D.

Member E is provided with an inlet connection as at 61 and an outlet connection as at 68. Alternately arranged and spaced baflle plates 69 are provided whereby the lubricating oil from the engine served may enter at 61 and pass between tubes 66 sinuously as illustrated by arrows. Thus it will be seen that the device illustrated in Fi ures 1 through 4 may be equipped with means for cooling the lubricating oil as well as the jacket coolant and that the cooling is al'; e by water caused to pass in series through the tubcs of the banksof tubes.

In Figures 7 and 8 I illustrate a modification wherein other means are provided for taking care of unequal expansion and contraction between tubes 14 and housing A. The left hand header shown in Figures 1 through 6 is dispensed with and tubes I4 are extended through a tube plate 15.

A header cap 16 is provided and the tube plate is fastened and sealed to housing A by means of gaskets 25 and bolts 29. Header cap 16 is provided with an inlet opening as at 11 similar to inlet 21 in Figure 1. The other ends of tubes 16 extend through a tube plate 18.

Tube plate 18 is made somewhat smaller than the inside of housing A and a sealed fiexibleconnection is made between this tube plate and the end of housing A preferably by means of a synthetic rubber gasket 19, the gasket being bound and sealed to plate 18 by means of strips 80 and bolts 8| Clearly flexible member 19 will provide for independent expansion and contraction of the tubes relative to housing A and the water leaving tubes 14 will be caused to enter tubes 66 similar to the design shown in Figures and 6.

In Figure 7, we illustrate a header 82 having an outlet opening as at 83 similar to outlet opening 31 in header C. Header 82 is provided preferably with a vertically extended projection 84 having a screw threaded opening 85 in its top adapted to receive a pipe plug 86, the plu being provided with a zinc element 81 which occupies the space provided by projection 84. This element is adapted to counteract electrolysis in the cooling part of the system, the element being properly secured to plug 86 so it can easily be removed and replaced.

Clearly we have provided a very compact jacket water and lubricating oil cooling device having a shape and being designed so it will answer the same purpose as a cooling radiator and individual oil coolers by making use of water as a coolant instead of air so the device can be made very cured to its inner surface, said wall and bracket having registering openings which register with said other cap opening, means whereby said "bracket and cap may be removably fastened and sealed together at said opening comprising a gasket and bolts, said bolts slidably extending through said other cap and being screw threaded into said bracket, said bracket being spaced a distance from the edge of the outer wall of said header whereby said bundle of tubes may expand and contract independent of the other cap.

2. A device of the character described comprising; a shell, a bundle of tubes in said shell having a tube plate at one end which overlies the adjacent end of the shell, a cap having an opening and a surface adapted to register with the overlying portion of said tube plate, means to removably fasten and sealthe cap, tube plate and shell together, another cap having an opening and a surface adapted to be removably fastened and sealed to the other end of the shell, a header for the other end of the tubes having an opening which registers with the opening in the other cap and means for binding and sealing the header and other cap together around their said openings, an inclosure for said tube bundle having an inlet at its top and an outlet at its bottom, sealing means between the sides of said inclosure and said shell, a liquid level extension on the top of said shell having an inlet and an outlet to said enclosure inlet, said shell having an outlet at its bottom adjacent said enclosure outlet, thereby to form a liquid passageway through said inclosure from said extension inlet to the shell outlet and a liquid passageway through said bundle of tubes from said other cap to the outlet of said first mentioned cap opening.

3. A device of the character described comprising; a shell, a bundle of tubes in said shell having a tube plate at one end which overlies the much smaller than the units they displace, thus to increase eiilciency, reduce the space occupied, particularly where larger space is not available and a device which can be disassembled and reassembled for cleaning and inspection.

Clearly many minor detailed changes may be made without departing from the spirit and scope of our invention as recited in the appended claims.

Having thus shown and described our invention, we claim:

1. A device of the class described, comprising a shell, a bundle of tubes in said shell having a tube plate at one end which overlies the adjacent end of the shell, a cap having an opening and a surface adapted to register with the overlying portion of said tube plate, means to removably fasten and seal the cap and tube plate to the shell, another cap having an opening and a surface adapted to be removably fastened and sealed to the other end of the shell, a header for the other ends of the tubes, the outer end wall of which is flat and made of thin flexible metal and having a bracket seadjacent end of the shell, a cap having an opening and a surface adapted to register with the overlying portion of said tube plate, means to removably fasten and seal the cap, tube plate and shell together, another cap having an opening and a surface adapted to be removably fastened and sealed to the other end of the shell, a header for the other end of the tubes having an opening which registers with the opening in the other cap and means for binding and sealing the header and other cap together around their said openings, an inclosure for said tube bundle having an inlet at its top and an outlet at its bottom, a liquid level extension on the top of said shell having an inlet, of said shell having an outlet at its bottom, a partition in the bottom of said extension having an outlet which registers with the inlet in said inclosure with sealing means therebetween, thereby to form a liquid passageway through said enclosure from said extension inlet to the shell outlet and a liquid passageway through said bundle of tubes from said first and other cap openings.

FRED M. YOUNG. WILLIAM V. ASTRUP.

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