US2286398A - Heat exchanger - Google Patents

Description

June 16 1942.

F. M. YOUNG HEAT fixcgAmEn Filed May 1'7, 1939 3 Sheets-Sheet 1 l/VVENTOR H250 M You/v6 ATTORNEY June 16, 1942. F. mvouue HEAT EXCHANGER Fneq May.1'7, 1939 a Sheds-Sheet 2 INVEN Toe Fla. 4

ATTOR/Vi) June 16, 1942. F. M. YOUNG HEAT EXCHANGER Filed May 17, 1939 3 Sheets-Sheet 3 (25 i E; E E E E /za //v VEN 7'02 Patented .mne aiaiz r 2,286,398 I HEAT EXCHANGEB.

Fred M. Young, Racine, Wis.

Application May 17',

1939, Serial No. 274,099

- 2 Claims. (Cl. 257-259) having a fan and a coolant circulating pump mounted thereon and receiving power for driving the fan and pump either from the engine by means of V-belts or direct from an electric motor or otherwise.

The principal object of the present invention is to provide a device which may be manufactured, sold and shipped as a complete unit which is simple, compact and economically operated.

An object of the present invention is to provide vertically positioned finned headers and horizontally positioned tubes whereby the bottom ends of the headers may be slidably secured to the frame members to thereby provide means for unequal expansion and contraction of the tubes and frame.

Another object of my invention is to provide means in the headers whereby the coolant may move through certain groups of tubes in series.

A still further object of the present invention is to provide a structure whichrmay be moved about on its base and suitably secured to almost any kind of foundation and wherein the device will operate more satisfactory than if made a part of the engine installation.

To these and other useful ends my 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: v

Fig. l is a front elevational view of my complete unit as viewed from the fan and pump side.

Fig. 2 is a side elevational view of the design illustrated in Fi ure 1.

Fig. 3 is a fractional view of Figure 2.

Fig. 4 is a fractional section taken of Figure 2.

Fig. 5 is a front elevation of the core assembly taken on line 5-5 of Figure 2.

Fig. 6 is a top view of the carries the circulating pump.

Fig. 7 is a section of the frame brace taken on linel-I of Figure 6.

Fig. 8 is a fractional sectional view taken on line 8-8 of Figure 1.

As thus illustrated, my invention consists of two side base members I'll-i0 and being secured together at one end of the assembly preferably by means of an inverted U-shaped channel II which also acts as supporting means for the ciron line 4-4 frame brace which taken online 33 I culatine pump as will hereinafter appear. Member II has secured to its endsplates |2|2 as illustrated in Figures 6 and '7 havin openings It by means of which they may be securely attached to members In in the position illustrated in Figures 1 and 2. The rearends of frame members ID are secured together by means of an inverted U-shaped bracket ll, the ends of which are preferably welded to members I thus members II and I4 act to securely hold members In in spaced relation and form a rigid supporting frame upon which to mount the other members of the unit.

The present invention differs somewhat from conventional cooling units in that the coolant cally positioned headers 20 and 2|. Tube plates 22 are suitably secured to the inner open faces of the headers by meanspf suitable gaskets and spaced bolts. The tube plates are operatively connected together by means of circulating tubes 23, these' tubes being preferably flattened with their flat sides positioned horizontally as illustrated in Figure 8.

I provide a multiplicity of closely spaced fins 24 through which the tubes extend thus a suitable operating connection is made between the two headers, header 20 being provided with an inlet connection 25 and header 2| with an outlet connection 26.

I preferably. provide partitions" 21 and 28 in headers 20 and 2| asillustrated in Figure Thus it will be seen that the coolant may enter at 25, pass into header 2| and return from this header into header 2!! through certain tubes and 35 then return from header to the portion of header 2| which is below partition 28. Thus I provide what I term a 3 pass radiator or heat exchanger. That is, the tubes are divided into three sections through which the coolant passes in series. Clearly other arrangements of partitions may be provided with which to make a 2 or 4 pass core.

Headers 20 and 2| are secured to frame member III as follows (see Figure 4) So far as members 20 and 2| are concerned, they are externally duplicates except member 20 is positioned with the inlet at the top and 2| is positioned so the same opening acts as an outlet at the bottom. In other words, the headers'are turned end for end.

The ends of each header are made flat, th

bottoms being provided with studs 29 which extend through enlarged openings .30 in the top flange of each of the frame members. 3| having a rubber. bushing 32 is concentrically PATENT oFric tubes are horizontallyv positioned between verti- A sleeve vided with an aperture suitable for the reception of bolt 29 and being slightly longer than sleeve 3 I. I provide a washer 33 and nuts 34 and 35 .whereby the washer may be held snugly against bushing 32 but not in contact with sleeve 3| tight enough to prevent end movement of the washer. Nut 35 acts as a lock for nuts 34. Thus it will be seen that members II) are definitely spaced and that the headers are definitely held in position on these members but that they may move because of opening 30 and rubber bushing 32.

Clearly tubes 23 of the core will be free to expand and contract. At the same time, the core assembly will be firmly held to the frame members.

I provide vertical frame plates 40 having intumed edges 4| (see Figure 3), the plate ends being secured to frame members ID in any suitable manner. These plates are preferably secured to the headers by means of intermediate plates 42. These plates are secured to the headers as illustrated in Figures 2 and 3 and to plates 40 by means of rubber washers 43 and bolts 44.

The upper ends of plates 40 are secured together by means of a tube 45. This tube is preferably welded to the plates and is anchored to the bottom of plates 40 by means of braces 4548; Thus it will be seen that members 40, 45 and 46 are rigidly secured together, that the plates are secured to members In and that the rear edges of these members are-secured tomembers 42 by means of cushioning washers as illustrated.. These cushioning washers act as means to dampen any vibration that might be set up in the frame assembly by the vibration of ;the fan.

The fan is mounted on the top of tube .45 by means of a bearing sleeve 41 and tube brackets 48. A fan shaft 49 is rotatably mounted in bearing sleeve 41 preferably by roller or ball bearings, the front end of the shaft having secured thereto V-belt sheaves 50.

In Figure 2 I illustrate the sheave as having 6 V-belt grooves for .purposes which will hereinafter appear. I mount a fan on the rear end of shaft 49 having blades These blades may be angled as illustrated and turned in the direction the unit or separately in a manner which will be understood without further description.

I provide preferably a centrifugal pump 50 having an outlet as at 6| which may be connected to the inlet or inlets of the various cylbetween slots 51.

Clearly member 66 may be mounted on the two rear or the two front slots of member ll. Thus the pump may be positioned to accommodate 1 or 2 driving belts for contact'with front or rear grooves in sheave '50 and the pump may be moved endwise on member ll for securing the desired tautness of the belt.

- Clearly the pump may be positioned on either end of member II Thus it will be understood that member 63 will permit necessary transverse movement of the pump for adustment of V belts 68. If however, the pump is positioned on the opposite'end of member II from that shown in Figurel, an extra length of hose will obviously be necessary. V

I provide an inlet connection 69 to header 2' having preferably a pipe connection to a surge tank 10, the connection having a T II with an inlet 12. Surge.tank I0 is. provided with the usual filler cap and an air vent as is customary in devices of the class. Thus the cooling fluid will enter the system as indicated by arrow in Figure 1. Tank 10 will act to maintain a constant supply of ilfuid'to the system and will permit the escape of any vapor that might reach fitting II Thus it will be seen that I have provided means for circulating and cooling the jacket fluid and that I have divided the tubes into groups through indicated by curvilinear arrow so the air is moved rearwardly through the core. blades at the opposite angle, the circulating air will be drawn through the core. In other words,

a when the driving belt turns in the direction invided with apertures 54 thus belt 51 may be made to operatively engage sheaves 50 from either side of the device. 'The plan illustrated in Figure .1 contemplates the use 'of driving sheaves on the engine shaft. The device may By turning the obviously be positioned on either side of the engine.

Clearly an electric motor may be used for driving the fan, the motor being mounted either on which the fluid. passes in series as indicated by curvilinear arrows. Clearly partitions 21 and 28 may be dispensed with thus making a one pass core, or other partitions may be supplied and positioned so as to provide either a two or four pass system. a

In radiators of the class, especiallylarge units there is a tendency for the tubes to sag. To remedy this diiliculty, I provide means for supporting the core at its center as follows:v V

A plate 15 is provided having a stud 16 which extends'through an aperture in channel 11 as indicated in Figures 5 and 8. This channel rests on the upper end of the headers and is provided with downwardly extending flanges 18.

I provide rods 19, two or more of which are secured to one end of plate 15 and the other two or more to the other end of this plate. The rods are spaced and of a size to fill the space between pairs of fins as illustrated and to which they'are bonded. Thus nut 30 may beadjusted so as to lift and support the center part of the core and prevent vibration. I may elect to support the core on member l4 either in the same manner by turning the parts end for end or otherwise.

Thus it will be seen that stud 16 will-.not only support the center of the core but that it will also prevent vibration which might in time cause the tubes to fracture.

I provide a fan shroud 85 which is'preferably secured to the headers and to member 11. I provide a wire screen 86 which acts as a shield for the fan blades. This shield is secured to the fan shroud as illustrated and divided into upper and lower portions, the lower portion being cut-away so as not to contact shaft 49 or the hub of the fan.

The screen 86 is divided as at 81, the adjacent edges being bent or turned outwardly and being embraced by a U-shaped strip 88. It will be noted that by removing member 88, the upper and lower portions of member 86 may be removed without disassembling the fan unit.

Clearly many minor detail changes may be made without departing from the spirit and scope of the present invention as recited in the apdescribed my invenan elongated rigid frame, a heat exchange core mounted on the rear end of said frame, said core comprising vertically arranged headers, their bottom ends being flat and resting in direct metal to metal contact on the frame, a multiplicity of closely spaced finned tubes forming operating connections between said headers, a bolt in the bottom of said headers, enlarged openings in said frame through which said bolts extend, yielding means positioned on said bolts and under said openings, means on said bolts adapted to apply pressure on said yielding means to thereby yieldingly hold said header ends and frames together. i

2. A device as recited in claim 1 including; narrow plates secured to the front sides of said headers and extending from the frame to near the vertical center of the headers, plates secured at their bottoms to said frame, their rear ends being secured to the front edges of said narrow plates without metallic contact by means of spaced bolts and rubber or the like washers, a cross member secured to near the front upper corners of said last plates and having rotatably mounted thereon intermediate its ends a blower fan. FRED M. YOUNG.

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