US1101969A - Tubular heat-interchanging apparatus. - Google Patents

Description

W. J. STILL. TUBULAR HEAT INTERGHANGING APPARATUS.

APPLICATION FILED NOV. 11, 1913.

1,101,969, Patented June 30,1914.

3 SHEETS-SHEET 1.

% A0444; W (Z/4,16

W. J. STILL. TUBULAR HEAT INTERGHANGING APPARATUS.

APPLICATION FILED NOV. 11, 1913.

Patented June 30, 1914.

3 SHEETS-SHEET 2.

W. J. STILL.

TUBULAR HEAT INTBRGHANGING APPARATUS.

APPLICATION FILED NOV. 11, 1913.

Patented June 30,1914.

3 $HEETSSHEET 3.

referred to tends to be maintained by fluid sate AE FFIQEQ WILLIAM JOSEPH STILL, OF WEST EALING,E1\TGLAND.

TUBULAR HEAT-HTTCHANGING APPARATUS Specification of Letters Patent.

Patented June 3, 1914b Application filed. November 11, 1913. Serial No. 80033 5.

rected to the obtaining of effective fluid tight joints without the necessity of making these permanent, so that access can be easily gained to the interior of the apparatus when necessary, as for cleaning ormspection.

Broadly, the jointing is obta1ned by arranging material of a flexlble character in contact with the edges of gills or flanges for example in such a manner that the contact\ pressure. I

In the accompanying draw1ngs,F1gure 1 1s a central vertical section ofthe upper and lower parts of an oil cooler of; closed type according to the invention and Fig 2 1s a part horizontal section thereof. F1g. 3 1s, a sectional elevation, Fig.4 a part-sectional plan with cover removed andFlg. 5 a part sectional end elevation of a modified form of the invention. Fig. 6 is a part sectional endi elevation showing a, modified construc tion.

In Figs. 1 and 2 the coollng llqllld. 1scaused to flow through aseries of tubes o to which are secured a seriesof plates bforming gills, the sa-id,plates being punched with holes to receive the tubes and in which the tubes are fixed. The oil to be cooled is caused to flow into the spaces between these gills through holes 0 in each, the holes inone gill. 6 being staggered or d1splaced w1th respect to the holes in the gill 1) next 1n order, but in lieu of uniting the gills peripherally to form an outer confining wall or casing',. which would entail permanent jointlng, the, spaces are closed circumferent ally. b jacket of a material of a more or less yielda ing or, elastic nature, such as vulcamte sub-. stitutes, for example vulcanizedfiber, or, 1t'

may be,.ductile metal, that will form a close unit to the top where joint with the gills and prevent oil leaking orfshort-circuiting between them. Such av jacket is shown as comprising a, slngle sheet d of the appropriate material of. a, d1 men sion equal in one direction to at leastthe overall distance between the uppermost and lowermost ills band in the other direction to encircle t e gills with anappreciable overlap, the edge portions 6 at the joint being brought into intimate contact with each other by suitable fastening means, as for example lacing means, a lace f in this case being shown as passed alternately around hooks or studs 9 secured to the sheet of ma terial. The eflect of this lacing is to cause thejacket to bind itself uniformly to the exof course important that the contour of the gills in face view shall not present any flat sides or edges with sharp angles but a curvilinear outline so that the jacket'will wrap snugly around the gills.

In the particular example now being described, the tubes a permost and lowermost plates or gills b and "extend vertically through a top plate It and a bottom plate 2' into which they are expanded. The bottom plate t' is larger than the to plate it so that it can be secured, as by bo ts i to the flanged lower end portion 7' of an outer casing into position over the top plate la a oint between the latter and the outer casing being made -by means of a stuffing box m, to allow for expansion and contraction of the tubes. The oil entering the apparatus is separated from the oil leaving the apparatus by means of a diaphragm n having annular -.grooves 0 turned in its periphery which is adapted to take into an annular recess in the part j of the casing is and form a practically liquid tight jolnt therewith. This diaphragm is formed with a ring part {of the same external diameter as the gills I) and around which the flexible covering ma- ,terial or jacket (1 also terror edges of the several gills, it being project beyond the uptightly extends so as to effectually close the joint between the ring and adjacentgill. Conveniently, the outlet "may be at r at one side of the j'df the outer casing in near the bottom plate 2' with the inlet 8 immediatel above the ,idiaphragmn which separates te inlet and "outlet. In this way the oil is caused to ascend around the acket 0? of the cooling it. then enters the spaces between the gills b and descends to the outlet, the diap ragm n being. perforated at 72 like the gills for outlet of.,oil. fAs the'oil is supplied to the cooler under pressure, the pressure of, the oil outside the lower part min flexible jacket 03' will be greater than on the inside thereof with the result that it will act to force the fiex'ble jacket tightly against the peripheries of the gills Z). The water or cooling medium inlet 15 is made centrally in a plate a which may serve as a base and is connected to the lower portion j of the outer casing by the bolts 6 hat secure the lower plate 2' of the cooling unit thereto. The outlet a for the water or equivalent may be similarly disposed centrally in a cover e secured to the top plate h of the cooling unit.

It is not always necessary that the jacketing forming a joint with the tube gills should be wrapped around the same. For example, in the oil cooler shown in Figs. 3, a, and?) where the tubes at are arranged horizontally and the gills b disposed vertically, the cooling liquid is caused to enter the upper compartment 1 of a fixed header 2 so as to flow through the upper set of tubes a to a rear movable header 3 and return by the lower set of tubes a to the lower compartment l of the front header. outer casing 5 of the cooler is rectangular in shape, provided with a removable cover 6 and having an oil inlet 7 at one side located at a height above the top of the gills b so that by providing flexible jointing side walls to such gills and fitting the outlet to one of the said walls, the o1l can be con strained first to descend between the casing 5 and the jointing wall, 8 and after passing below the latter to rise and flow uniformly between the gills. In the example, the flexible side walls 8, made of sheet lead, extend upwardly-to near the top of the casing 5 where each is stifiened by a bar 9 of suitable metal, the ends of such walls being detachably clamped together with adjacent edges of end walls 10 by metal corner clamps 11. lhe lower edges of the end walls 10 may be clamped to theheaders by metal bars 12. The oil outlet is shown as in the form of a ring or tube 13 clamped between the wall of the casing 5 and the adjacent lead wall 8 by means 0' washers 13 13 and bolts 13. Uwing to the frictional resistance ofi'ered by the gills b to the flow of the oil, coupled with the fact that the outlet 13 is larger in area than the inlet 7, a difference in level exists at opposite sides of the walls 8, the head or pressure due to this diderence serving, as in the previously described example, to keep the flexible walls 8 in contact with the gills and at the same time to insure a uniform upward movement of the liquid between the several gills.

As will be obvious, a single wall of lead or the like bent over, as indicated in Fig. 6, may be employed to engage the gills?) at both sides of the apparatus.

The movable header 3 is provided with feet 14 resting loosely upon the bottom of the casing 5 sothat relative movement can occur The Lioness between the complete nest of tubes a and the outer casing to compensate for variations in temperature.

The tubular heat interchanging apparatus hereinbefore described instead of being used for cooling a liquid, for example oil, as hereinbefore described can be used for heating a liquid, in which case a heating fluid would be passed through the tubes at.

What I claim is 1. A heat interchanger comprising a set of gilled tubes and sheet material of a flexible character held in contact with edges of the gills and forming a fluid tight joint therewith.

2. A heat interchanger comprising a set of gilled tubes and sheet material of a flexible character held in contact with edges of the gills in a detachable manner and forming a fluid tight joint therewith.

8. A heat interchanger comprising a set of gilled tubes and sheet material of a flexible character arranged in contact with. the edges of the'gills so that fluid pressure can be caused to press the sheet material against the gills to make joint therewith.

4. A heat interchanger comprising a set of gilled tubes, sheet material of a flexible character arranged in contact with the edges of the gills and means to fasten together the adjacent edges of pose specified.

5. A heat interchanger comprising a cas ing having a liquid inlet and an outlet, a set of gilled tubes in such casing, and sheet material arranged in contact with the edges of the gills the saidmaterial and the gills,form ing separated spaces through which the liquid must flow to pass to the outlet.

6. A heat interchanger comprising a casing having an inlet and an outlet, a set of gilled tubes in such casing, sheet material of a flexible character arranged in contact with the edges of the gills the said material and the gills, forming separated spaces through which the liquid must flow to pass to the outlet and means to fasten together the adjacent edges of said material.

7. A heat interchanger comprising a set of gilled tubes and a vertical wall of material of a flexible character arranged in contact with the edges of the '11s and past one end of which liquid must d w before it can gain access to the spaces between tubes.

8. A heat interchanger, comprising. a nested set of horizontal tubes having rectangular gills thereon, a casi g containing such set of tubes and to one end of which the set is secured, and walls of a flexible material adapted to gills under the pressure of a fluid and produce a series of isolated stream paths between the gills.

said material, for the pur-- the gills of the engage the vertical edges of the 9. A heat interchanger comprising a casrte ing having an inlet side, a nested set opening at one side thereof and an outlet opening at the opposite of gilled tubes in such casing, a Wall of material of a flexible character arranged in contact with the gills at the side of the nest of tubes adjacent to the liquid inlet, a similar Wall arranged in contact With the gills at the other side of the nest of tubes and having an opening therein in register with the outlet opening of the casing and a duct between the opening in the Wall and the outlet opening,

the liquiclentering at the duct at the outlet,

Signed at U.

WILLIAM Witnesses:

A. H. Sam/Ens, H. D. JAfinsoN.

JOSEPH STILL.

Sf consulate, London, this 31st day of October, 1913

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