Heat exchanger

Oct 29, 1957

S. K. ANDERSEN

2,811,337

HEAT EXCHANGER

Filed July 20, 1951 5 Sheets-Sheet 1

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aTTO&amp;MS-f''

2,811,337

Oct. 29, 1957

Filed July 20, 1951

S. K. ANDERSEN heat exchanger

Sheets-Sheet 2

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2,811,337

Oct 29, 1957

Filed July 20, 1951

S. K. ANDERSEN

HEAT EXCHANGER

Sheets-Sheet 3

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sow//#/wows#/ INVENTOR.

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^Trae/KV

Oct. 29, 1957

Filed July 20, 1951

S. K. ANDERSEN

HEAT EXCHANGER

2,811,337

Sheets-Sheet 4

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INVENTOR. ⁹

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Oct. 29, 1957

Filed July 20, 1951

s. K. ANDERSEN

HEAT EXCHANGER

2,811,337

Sheets-Sheet 5

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INVENTOR.

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pu“offly? ^{the draWiDSS}’ ^{Which are f}°^{r iUuStrative}Fig. 1 is a side elevation with parts broken away so as to show certain portions of the interior construction in section,

Fig. 2 is a plan view of the device;

fromVe shell;^® °^{f C}°^r® ^assembIy removed Fig. 4 is a side view of a baffle assembly;

Fig. 5 is an edge view of the same;

™ HnA^1S !^Dl*^rge!? ^fra£^mentary sectional view taken on line o—6 of Fig. 4’

Fig. 7 is a cross-section taken on line 7—7 of Fig. 1· Fig. 8 is a sectional view taken on line 8—8 of Fig. 3· „ a If·^{3 a}-,^{n enlar}g^ed sectional view taken on line ”—“ oi rig. 3;

10—-lO^of^ig³ l°^{d VieW} °^{f the cooler as seen} from line on V· ^1St.^{an enlarsed} fragmentary view showing the 20 relationship between the flange, header, and manifolding and retaining means therefor; ⁶

Fig. 12 is a sectional view taken on line 12__12 of

Fig. 1; and

Fig. 13 is a view similar to Fig. 11 showing a thicker shefl¹¹¹¹¹” ^{nnS f}°^{r taking up pIay} between the core and

Referring more particularly to Figs. 1, 2 and 3 the cooler comprises a shell, indicated generally at 10 a core assembly, indicated generally at 11, and end manifolds, indicated generally at 12 and 13 respectively. The shell 10 comprises a tubular or cylindrical barrel or body 14 which has an inlet port 15 adjacent one end ^and an outlet port 16 adjacent the opposite end, said ports being in substantially the same radial plane. At each end of the body 14 is a flange 17 which may be formed integrally with the body portion 14 or which may be secured thereto as by welding or the like as shown in the drawings, said flanges being welded at 18 to the tubular body 14.

a ^B°a ^flang®^{s are a,ike} and are shown as being thicker than the shell 14. The ends of the shell 14 are received a limited distance within said flanges as indicated at 20 kig. 1. Adjacent the end of the body 14 is an annular groove 21 in the flange 17 and spaced outwardly from

Z----~~ “““ me nee ena or tne llange is another groove 22 for reception of a retaining ring 23 as will be more fully described hereinafter.

. Between the inlet and outlet ports 15 and 16 respec„ n^{y and}; ^adi^acent the latter is a fixture, indicated genas· - erally at 25, which is provided with an inlet 26 and an outlet 27 separated by a partition 28 which is welded or otherwise suitably secured to the body 14 by welding as at 29, the other portions of the fixture being also welded or otherwise suitably secured to the shell where said fix^{tarecontacis sa}*^d shell as along the sides 30, Fig. 2. A channel member 32, having a closed end 33, is welded or brazed or otherwise suitably secured along the margins thereof to the shell body 14, one end of said channel 32 being also welded to the fixture 25 so as to provide an inlet passage 36 between the inlet passage 26 of the fixture and the inlet port 15 of the shell body. A similar but much shorter channel member 38, having a closed end 39, is also marginally welded or brazed or otherwise suitably secured to the shell body 14. The inner end of said channel member 38 is secured to the fixture 25 by welding or any other suitable means and provides an outlet passage 40 between the outlet port 16 and the outlet, passage 27 in the fixture.

A suitable valve mechanism, indicated generally at 42, is secured to the fixture 25 by screws 43 or the like; Figs. 2 and 10. The valve mechanism 42 has an inlet 44

2,811,337

HEAT EXCHANGER ^S°r^^?^derSenl=^{Los An}g=^!es, Calif., assignor to The tioTof CaEa ’ ^{S CaH}·’ ^{a CMpora}Application July 20, 1951, Serial No. 237,713

Claims. (Cl. 257—236) anl^i^⁶^^{011 relateS} Seneraily to heat exchangers ^a“^d reiates more particularly to oil coolers for internal combustion engines.

Υ¹¹¹¹® the invention has utility in connection with oil it to b^De nnf°m ^des.^cribed> such connection, thereto ^understood that its utility is not confined

After a period of use, there is an accumulation of sludge, dirt, metal particles and other foreign material of 5® ^{COoler whlch} not only impairs the efficiency thereof but may result in the cooler becoming dangerous to 25 use. Penodic internal cleaning must be made aid under co ^r“^{al operatui}£ conditions it is recommended that the ool^r be cleaned at each normal engine change.

F^{eladvely fre}q^uent cleaning is required and, of course, the cleaning time should, be as short as possible 30 consistent with a good cleaning job, so that the eqSpi to kee7 it™^{1 be} n- °^{f SefVice 10Dger than is} necessary . to keep it in condition.

ve^^rfl^tOv^re’ ^C°t^{lerS have usualIy been} cleaned by rever.e flushing with a suitable solvent. However, this is 35 not entirely satisfactory as it is extremely difficult with tois method to remove all the metal particles which may have entered the device. Moreover, reverse flushing of coolers requires the use of a substantial amount of equiph f^ndsuch equipment is not always available, par- 40 ficffiarly at remote air fields, thus causing a serious delay in maintenance which results in tying up of the aircraft for undue periods of time.

It is an object of the present invention to provide an on cooler which overcomes the above difficulties Th;» 45 T,— “““ outwardly iron is effected by providing a removable core so thajfte ^a”^{d adjacent} *e free end of the flange i ^cleamng of said core may be effected quickly, efficiently and thoroughly. ^y

Inasmuch as saving in space and weight in aircraft are important factors, it is desirable to have the cooler ao compact and light in weight as possible and these requirements are met in the present invention.

Another object of the invention is to provide a cooler of this character that is highly efficient in operation.

It is another object of the present invention to provide a device of this character wherein there is effective sealing means for the ends of the core.

Still another object of the invention is to provide effective sealing means for the baffles so as to minimize bypassing of said baffles.

A further object of the invention is to provide a device of this character wherein axial play between the core and shell is eliminated.

A still further object of the invention is to provide a device of this character having means whereby the removable core is retained in the shell in such a manner as to maintain a close fit therein and compensate for any build up in construction tolerances.

Other objects and advantages of the invention will ⁷⁰appear m the following part of the specification.

2,811,387 tween the various parts. The outer end or face of the header plate 50 engages a shoulder 79 of the rim 76 and the parts are held snugly together by the retaining ring 23 which is received in the annular recess 22. The recess 22 has an outer wall 80 which is normal to the axis of the device, a bottom wall 81 engaged by the peripheral side of the ring 23, a wall 82 parallel with, opposite to and of less height than the wall 80. The groove 22 is further defined by an upwardly and inwardly inclined wall 83 which extends from the inner end of the wall 82 and facilitates insertion of the gasket The flange 17 has a cylindrical surface 85 between the grooves 22 and 21, said surface 85 overlying a groove 86 in the rim 76 and said groove 86 sealingly receives an O ring 87 which serves as a sealing gasket between the manifold and said surface 85.

The manifold has an annular outer surface 90 which is normal to the axis of the device and against which the retaining ring 23 is adapted to abut. It is tobe noted 20 that in Figs. 1 and 11, the thickness of the retaining ring 23 is less than the width of groove 22 between the walls 80 and 82. In these figures, the ring is sufficiently wide to provide the proper tight fit between the parts. However, in Fig. 13 it is to be noted that the ring 23α, corre25 spending to the ring 23 in Figs. 1 and 11, is somewhat thicker than the ring 23 and substantially fills the space between the walls 80 and 82 of the groove 22 to provide the necessary tight seal between the parts where the core is shorter relative to the shell than that in the arrange30 ment shown in Figs. 1 and 11. Thus, by use of retaining rings of suitable thickness, variations in the manufacturing tolerances are compensated for. It is to be understood, of course, that retaining rings of various thickness may be used to compensate for the differences 35 in relative length of the shell and core and that the thickness of such rings depends on the variations in the relative length of said core and shell.

Each of the end manifolds 12 and 13 have a conduit portion 92 and 93 respectively which terminates in an 40 enlarged cavity 94 communicating with a recess 95 whereby the conduit portions 92 and 93 are in communication ; with the entire end. portion of the core. The conduit 92 is shown as the inlet for a coolant which may be a J liquid such as engine fuel which flows through the tubes j ⁴⁵ 51 and the conduit portion 93 comprises the outlet for such coolant. It.has.been found highly desirable to cause the coolant to flow axially in a direction opposite that of the general flow direction of the oil in the cooler. However, the fuel may flow in the same direction as the 50 general direction, of the oil flow. It is also to be understood; that the inlet and outlet for the fuel may be at the same end of the cooler so that the fuel will make a plurality of. passes: (two. passes) through the core.

In order to remove the core from the shell, the mani⁵⁵ folds 12 and 13 are removed by first removing the retaining rings 23 which secure said manifolds in the assembly. With the manifolds removed, the core can be readily removed from the shell by longitudinal pressure. After the core has been cleaned; it may be readily re⁶⁰ placed and the manifolds secured by the retaining rings 23.