US2611248A - Means for effecting heat exchange between a rotating solid body and a gaseous medium, particularly for cooling fluid transmissions with rotating casings - Google Patents

Means for effecting heat exchange between a rotating solid body and a gaseous medium, particularly for cooling fluid transmissions with rotating casings Download PDF

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US2611248A
US2611248A US226581A US22658151A US2611248A US 2611248 A US2611248 A US 2611248A US 226581 A US226581 A US 226581A US 22658151 A US22658151 A US 22658151A US 2611248 A US2611248 A US 2611248A
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channels
casing
rotating
ports
sections
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Ahlen Karl Gustav
Odman Tor Axel
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Svenska Rotor Maskiner AB
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Svenska Rotor Maskiner AB
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H41/00—Rotary fluid gearing of the hydrokinetic type
    • F16H41/24—Details
    • F16H41/30—Details relating to venting, lubrication, cooling, circulation of the cooling medium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S60/00—Power plants
    • Y10S60/912—Cooling means

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  • the invention relates to heat transfer between solid and gaseous bodies and has particular reference to such transfer betweena rotating solid body and a gaseous medium. Still more particularly the invention relates to the cooling by air or other gaseous medium of rotating bodies which are heated as .a result of their normal operation and which require cooling during such operation in order to dissipate excess heat and limit the working temperature of the body to an accept able value.
  • the general purpose of the invention is to provide improved heat transfer by maintaining both high relative velocity and relatively high temperature difference between the heat exchanging bodies so that a high coemcient of heat transfer is obtained, and to effect the high rates of heat transfer in a novel manner requiring the minimum of power absorption for the heat transfer function.
  • Fig. 1 is a central longitudinal section showing the invention applied to a hydraulic torque converter, the section being taken on the line !-l of Fi 2;
  • Fig. 2 is a section taken on the line 22 of Fig. 1;
  • Figs. 3 and 4 are fragmentary views similar to Fig. 1 showing different forms of housing structures of the hydraulic apparatus;
  • Figs. 5, 5a and 5b, taken on line 5-5 of Figs. 6, 61a and 6b, are sectional views on enlarged scale of different embodiments of b-afile or guide elements contemplated by the invention;
  • Figs. 6, 6a and 6b are elevations of the structures shown respectively in Figs. 5, 5a. and 5?) taken on the line 6-'6 of the latter figures;
  • Figs. 7, 7a and 7b are fragmentary sections similar to Fig. 2 showing difierent forms of apparatus embodying the invention
  • Fig; 8, taken on line 8-8 of Fig. 9, is a iragmem tary section similar to Fig. 1 showing another form of the structure embodying the invention
  • Fig. 9 is a fragmentary elevation looking from the right of-Fig. 8;
  • Fig. 10 is a fragmentary plan view as seen from above Fig. 9;
  • Fig. 11 taken on line H-H of Fig. 12, is a fragmentary section similar to Fig. 1 of still another embodiment of the invention, and I Fig. 12 is a fragmentary transverse view, partly in elevation and partly in section taken on line
  • the apparatus illustrated is a hydraulic torque converter of the hydrodynamic type incorporating the invention.
  • a rotatably mounted casing indicated generally at H
  • the casing H provides a tonic chamber lit for circulation of the power transmitting liquid.
  • the casing in carries the pump or impeller blades [8 and in effect constitutes the pump or driving member of the apparatus.
  • a rotatably mounted driven member zd provides a turbine wheel 22 which in the present instance carries a ring of turbine blades 24 and, indirectly through a part of the torus ring 26, a second ring of turbine blades 28.
  • a ring of guide or reaction blades 30 is carried by the wheel part of a rotationally fixed reaction member 32 secured to an outer stationary housing member 34 fixed to a stationary part of the engine structure indicated at 3'6.
  • the structure thus far described is of more or :less conventional known form, providing what is ordinarily termed a two-stage converter, through which power is transmitted by circulation of the power transmitting liquid through the pump, turbine and reaction bla'ding in the direction indicated by arrow 38.
  • the specific nature of the hydraulic circuit is immaterial and may embody any desired number of stages for converter operation or only pump and turbine members for coupling operation.
  • the rotating casing may carry the turbine blades rather than the pump blades, which is a well known form of construction, but for reasons hereinafter pointed out a construction in which the rotating casing carries the pump blades may in many cases be preferable.
  • the example illustrated is of built up construction comprising a wheel element 40 carrying the pump blades I8 and forming the forward wall of chamber It, a second element 42 forming the rear wall of the chamber and an annular ring like element 44 joining the other two elements.
  • the element 44 is provided externally with a series of radially extending flanges in the form of ribs or fins 46 separated by intervening grooves 48, these ribs and grooves being concentric with respect to the axis of rotation of the casing.
  • the internal surface 50 of element 44 is cylindrical and radially spaced from a similar outer surface 52 on element 42.
  • a cylindrical baffle plate or drum 54 is located in radially spaced relation to both surfaces to provide annular channels 56 and 58 which communicate with each other through ports 60 in the baffle 54.
  • Channel 56 is in communication with the radially outer port of chamber I6 by way of a series of peripherally spaced bores 62, while channel 58 communicates through bores 64 with chamber I'Ei at a place radially inwardly of the place of communication established by bores 62.
  • heat generated in the hydraulic working circuit will be dissipated by direct conduction through the casing to the cooling ribs 46 from chamber l6 and also from the fluid circulated through the cooling circuit.
  • the above noted deficiencies in the cooling of apparatus of the kind discussed by way of illustration are overcome and the transfer of heat from or to rotating bodies at high rate is accomplished by providing a controlled air flow relative to the heat exchange surface of the rotating body which operates to maintain at all times and over substantially the entire area of the heat exchange surface a high relative velocity between the rotating surface and the heat exchanging gaseous medium.
  • This high rate of heat transfer is further obtained in accordance with the invention with the minimum expenditure of energy for causing the required circulation of the gaseous medium in heat exchange relation with the rotating body and in a great many cases adequate heat exchange at relatively high rate is obtainable without the necessity for fans or other like apparatus, the rotation of the rotating body itself being utilized in a manner which makes possible the high rate of exchange that is obtained.
  • the principles of the invention may be employed in conjunction with apparatus providing for circulation of the gaseous medium by means such as a fan separate from or carried by the rotating body, but even in such cases the utilization of the principles of the invention, enable the desired extremely high rate of heat transfer to be obtained with a minimum expenditure of power.
  • the improved results flowing from the invention are achieved not only by the utilization of controlled streams of gaseous medium but also by so relating the flow of such streams to the rotating body that relatively high velocity is maintained between the two bodies in heat exchange relation, while at the same time the maximum absolute velocity of the gaseous medium is maintained at a relatively low value, so that the energy required to accelerate and decelerate the mass of gaseous medium used for heat exchange purposes is relatively very low.
  • the improved results are obtained by so relating the flow of the gaseous medium in heat exchange relation with the rotatingbody that any given quantity of the gaseous medium is in heat exchange relation with the rotating body for only a relatively short period of time, so that the average temperature difference between the two heat exchanging bodies is much higher than in previous forms of heat exchange arrangements of the kind under consideration.
  • controlled flow of gaseous medium is, in accordance with the principles of the invention, so related to the rotating body that minimum resistance and power loss is obtained because of the substantial absence of highly turbulent flow, which has heretofore often been resorted to in order to obtain high rates of heat exchange but only with correspondingly high power requirements for effecting the desired function of the apparatus.
  • the outer stationary housing 34 comprises a wall portion encircling the ribs on the rotating casing and forms cover means for the grooves or channels 48.
  • This wall portion is interrupted at peripherally spaced places by openings providing communication between the channels and ambient atmosphere, as will be seen more clearly in Fig. 2.
  • the cover portions of the wall are provided by peripherally spaced web portions 66 and in the openings between adjacent web portions axially extending ribs 68 serve to support baffle members 10.
  • Each of these baflle members comprises a series of obturating battles in the form'of vanes or fingers l2 which extend inwardly into and substantially fill the cross sections of the channels'in the casing.
  • baflles equidistantly spaced around the periphery are employed.
  • the number of these baflles may vary and may be less than the number shown, or more.
  • the greater the number of baflles, within- The spaced baffles serve to sub-divide the chan nels into a plurality of sections and the support-f ing ribs 63 and bafiie members 10 divide each of the openings in the wall of the housing into two openings or ports, one on each side of each bafile member.
  • These ports are located at the ends of the several sections and provide for each section an inlet port 74 and an outlet port 16 for flow of air through each of the sections in the direction of rotation of the casing as indicated by the arrows 18.
  • Flow of air in the present instance is effected by rotation of the casing which acts to draw air into the channel sections in the manner shown, from which it is ejected through the several outlet openings by the action of the ob'- turating bailles.
  • the air is ejected from the channelsafter arelatively short path of travel and before its velocityiand temperature have increased to'such.
  • the grooves or channels should'berelatively deep and nar-- row,
  • the ratio may bein the order-of l0'to '1 or placement of the air in the channels such that substantially all of the air is brought into contact with the walls in even a short path of travel.
  • the air is not-forced to-a rotary tumbling move-- ment of the'air stream in the plane of rotation.
  • This kind of turbulence should be avoided since it decreases the rate of heat transfer'per unit area.
  • the length of the channels is chosen, giving effect to the particular conditions of the individual case,-
  • the outer element of the rotating casing has been shown as being of cast or forged form of one-pieceintegral-construction including the cooling fins.
  • Forged construction is relatively expensive and cast construction, particularly if relatively weak metals such as aluminum and the like are employed, may be subjected to undesirably high centrifugal stresses for such materials if used in high speed applications.
  • Cast or forged construction is, however, not required, and in Fig. 3 there is illustrated an alternative form in which a structure-built up of stampings may be used. Referring now to this figure the construction illustrated is generally similar to that previously described, corresponding parts being correspondingly numbered, and detailed description is accordingly not required.
  • the outer or ring element 44a of the casing is made in the form of a stamping to which the cooling fins 46a of sheet, metal are attached in anysuitable fashion, as by welding, brazing or other methods giving good heat conduction to the fins.
  • cooling fins have been shown as extending radially from the outer surface of a cylindrical drumlike ring element forming a part of a casing which further provides an internal cooling circuit for working liquid in addition to the working circuit.
  • the invention is, however, not limited to this form of construction since efiective cooling can :be obtained with cooling fins positioned differently and in certain cases, more particularly with couplings, the separate internal cooling circuit may be dispensed with.
  • Fig. 4 a different form of casing which may be utilized as a part of a coupling or converter, the pump and turbine parts being omitted from the drawing.
  • the rotating casing 84 which may be either driving or driven is provided with a series of external circular cooling fins 46a concentric about the axis of rotation of the casing but following the contour of the casing which defines the working chamber l6 of the device.
  • the outer stationary housing 34 is provided with bafile members 10, the arrangement being similar to that illustrated in Fig. 2.
  • the heat is dissipated by direct conduction through the wall of the casing through the working chamber to the cooling fins.
  • obturating bafiie fingers may vary and as will be seen from Fig. 2 these fingers may be bent forwardly against the direction of rotation of the casing to form scoops for ejecting the air from the channel sections. More important, however, is the cross sectional form of the fingers and different suitable embodiments of fingers are illustrated in Figs. 5, 5a, and 5b.
  • the fingers are tapered in the plane of rotation so that the clearance between the walls of the ribs 46 and the fingers is established by relatively sharp edges 13, which, should the clearance be lost for any reason, are easily worn oflf without damage to the parts.
  • 8 sealing edges may be obtained with other specific configurations and while it is preferable for the edges to face the direction of rotation of the casing as indicated by the arrow in the Fig. '2, this is not essential.
  • the finger may be formed as shown in Figs. 5a and 6a, in which the fingers are plated to provide a coating 12a. of relatively porous material that is readily worn off in case of unintended contact between the parts. While desirable, special forms of section of the battles is not essential and in Figs. 5b and 6b fingers of rectangular section and of conventional material such as precision cast iron are indicated.
  • guide bafiles in addition to the obturating baflles 12, such an arrangement as shown in Fig. 7.
  • guide baflles 86 which terminate materially short of the bottoms of the channels formed between the ribs 46, serve to subdivide and guide the air streams entering the inlet ports 14, to insure immediate flow of the incoming air to thebottoms of the relatively deep channels.
  • the guide bafiles may be supported in any suitable fashion from the housing. In the present embodiment such support is indicated by thin peripherally spaced cross members 88 between which the entering air fiows as indicated by the arrows in the figure.
  • auxiliary guide baffles 86 are provided to guide both inlet and outlet flow, and-as may sometimes be desirable in the case of very deep channels, auxiliary guide bafiles such as shown at 86a may be employed.
  • inlet ports 14 are larger than the outlet ports 16, this being accomplished by making the inlet ports of greater peripheral extent than the outlet ports, as shown in Figs. 7-71).
  • the use of inlet ports of greater area, than the outlet ports is beneficial regardless of whether or not guide bafiles are employed.
  • Figs. 8-10 inclusive a commercial embodiment of the invention as applied to a torque converter for a bus transmission transmitting power from an engine of approximately 150 H. P. is shown.
  • Fig. 8 the internal elements of the converter have been omitted but may be assumed to be of any conventional form such as illustrated in Fig. 1.
  • the rotating casing-with integral cast ribs 46 is encircled by the stationary outer housing 34 which is provided with a series of peripherally spaced openings, indicated generally at 89. In the present case eight such openings are provided.
  • a closure member 90 is provided which is removably secured to the housing 34 by studs 92.
  • closure members are in the form of frames to which are secured the obturating bafiles 12 which in the embodiment illustrated are in the form of comb-like members which are advantageously and economically made by precision casting.
  • the closure members also carry the guide baflles 86which advantageously may be of the same general formand construction as the obturating baflles 12.
  • the obturating bafile members serve to divide the openings 89 in the housing 34 into inlet ports 14 and outlet port 16 when the closures are in place, the flow of air being as indicated by the arrows in Fig. 9.
  • the closure members 90 also provide means whereby the grooves or channels may be protected from damage due to solid bodies which otherwise might be thrown into the grooves through the ports when the apparatus is used in many usual locations in automotive use. This protection is readily accomplished by the employment of suitable screens 94 carried by the closure members and covering the ports. It will be noted that in this embodiment as well as that shown in Figs. 7-71) the obturating bafii'les are so located on the closure members that when the latter are in place the inlet ports M have materially greater area than the outlet ports it.
  • the rotating casing is similar to that shown in Fig. 8 and is provided with cooling ribs 46 cast integrally therewith;
  • the rotating casing also carrie a centrifugal fan indicated'generally at 96 and having impeller blades 98 which draw air through the inlet opening I06 and discharge it radially past diffuser guide vanes I02 to chambers lM'from which the air flows through inlet ports .15 into the'channel sections, to flow through the sections counter to the direction of rotation of the casing, as indicated by the arrows in Fig. 12.
  • closure members 90 are formed with solid covers 900;, covering inlet ports 14 so as to provide the chambers m4 into which the air is delivered from the fan.
  • the supply of forced draft air for circulation counter to the direction ofrotation of the housing may be accomplished in many different ways and from sources other than fans forming a part of the apparatus cooled.
  • a hydraulic power transmission comprising a rotating casing providing a working chamber for circulation of power transmitting liquid re quired to be cooled during normal operation of the apparatus, said casing carrying a plurality of external circular open channels concentric With the axis of rotation ofthe casing, a rotationally stationary housing around said casing providing cover means for said channels, a plurality of rotationally stationary peripherally spaced obturating baffles extending into said channels for subdividin the same into a plurality of-sections and ports in said stationary housing opening into said channels adjacent to and on the peripherally opposite sides of each of said bailies for flow of gaseous cooling fluid into and out of each of said sections.
  • a hydraulic power transmission comprising a a rotating casin providingv a working chamber for circulation of power transmitting liquid required to be cooled duringnormal operation of the apparatus, said casing carrying a plurality of external circular open channels concentric with the axis of rotation of the casing, a rotationally a rotating casing providing a working chamber for circulation of power transmitting liquid required to be cooled during normal operation of the apparatus, said casing having a plurality of relatively deep and narrow circular open channels concentric with the axis of rotation of the casing, a rotationally stationary housing around said casing including wall structure encircling the open faces of said channels adjacent thereto for providing cover means for the channels, a plurality of peripherally spaced rotationally stationary obturating baifies extending into said channels for subdividing the same into a plurality of sections, and ports in said stationary housing opening into said channels adjacent to and on the peripherally opposite sides of each of said bafile members for flow of gaseous cooling fluid into and out of each of said sections.
  • a hydraulic power transmission comprising a rotating casing providing a working chamber for circulation of power transmitting liquid required to be cooled durin normal operation of the apparatus, said casing having a plurality of relatively deep and narrow circular open channels concentric with the axis of rotation of the casing, a rotationally stationary housing around said casing including wall structure encircling the open faces of said channels adjacent thereto for providing cover means for the channels, a plurality of peripherally spaced rotationally stationary obturating baflles extending into said channels for subdividing the same into a plurality of sections, ports in said stationary housing opening into said channels adjacent to and on the peripherally opposite sides of each of said bafile members for flow of gaseous cooling fluid into and out of each of said sections, and guide bafiles extending into said channels from certain of said ports and terminating short of the bottoms of the channels for guiding flow of fluid passin through said certain ports.
  • a hydraulic power transmission comprising a rotating casing providing a working chamber for circulation of power transmitting liquid required to be cooled during normal operation of the apparatus, said casing having a plurality of relatively deep and narrow circular open channels concentric with the axis of rotation of the casing, a rotationally stationary housin around said casing including wallstructure encircling the open faces of said channels adjacent thereto for providing cover means for the channels, a plurality of peripherally spaced rotationally stationary obturating baflles extending into said channels for sub-dividing the same into a plurality of sections, ports in said stationary housing opening into said channels adjacent to and on the peripherally opposite sides of each of said baflle members, said ports providing an inlet port and an outlet port for each of said sections, and guide baffles extending into said channels and terminating short of the bottoms thereof for guiding flow of fluid entering said channels through said inlet ports.
  • a hydraulic power transmission comprising a rotating casing providing a working chamber for circulation of power transmitting liquid required to be cooled during normal operation of the apparatus, said casing having a plurality of relatively deep and narrow circular open channels concentric with the axis of rotation of the casing, a rotationally stationary housing around said casing including wall structure encircling the open faces of said channels adjacent thereto for providing cover means for the channels, a
  • a hydraulic power transmission comprising a rotating casing providing a working chamber for circulation of power transmitting liquid re quired to be cooled during normal operation of the apparatus, said casing carrying a plurality of external circular open channels concentric with the axis of rotation of the casing, a st'a' tionary outer housing around said casing including a wall encircling the open faces of said channels, said wall having a plurality of peripherally spaced openings therein providing communication with said channels, a plurality of closure members removably secured to said housing, each of said closure members carrying a baflle member comprising a plurality of obturating baffles extending into said channels when said closure member is in place, said baffles constituting obturating elements for subdividing said channels into a plurality of sections and said baffle members dividing the several openings into ports on the opposite sides thereof and each communicating with a diiferent one of said sections.
  • a hydraulic power transmission comprising a rotating casing providing a working chamber for circulation of power transmitting liquid required to be cooled during normal operation of the apparatus, said casing carrying a plurality of external circular open channels concentric with the axis of rotation of the casing, a rotationally stationary housing around said casing including a wall encircling said channels adjacent to the open faces thereof, a plurality of peripherally spaced rotationally stationary obturating bafiles extending into said channels for subdividing the same into a plurality of sections, ports in said stationary housing opening into said channels adjacent to and on the peripherally opposite sides of each of said baflle members to provide an inlet port and an outlet port for each of said sections, and means for forcing cooling air through said inlet ports to flow through said sections in a direction counter to the direction of rotation of said casing.
  • a hydraulic power transmission comprising a rotating casing providing a working chamber for circulation of power transmitting liquid required to be cooled during normal operation of the apparatus, said casing carrying a plurality of external circular open channels concentric with the axis of rotation of the casing, a rotationally stationary housing around said casing including a wall encircling said channels adjacent to the open faces thereof, a plurality of peripherally spaced rotationally stationary obturating baffles extending into said channels for subdividing same into a plurality of sections, ports in said stationary housing opening into said channels adjacent to and on the peripherally opposite sides of each of said bave members to provide an inlet port and an outlet port for each of said sections, a fan carried by said rotating casing and means providing passages for connecting the discharge side of said fan with said inlet ports for forcing cooling air to flow through the sections of said channels in a direction counter to the direction of rotation of said casing.
  • Apparatus comprising a rotatably mounted body having a plurality of circular open channels concentric with the axis of rotation of the body, rotationally stationary structure providing cover means for said channels, a plurality of peripherally spaced rotationally stationary bafile means extending into said channels for sub-dividing the same into a plurality of sections, and ports in said cover means opening into said channels adjacent to and on the peripherally opposite sides of each of said baflle means for flow of fluid into and out of each of said sections.
  • Apparatus comprising a rotatably mounted body having a plurality of circular open channels concentric with the axis of rotation of the body, rotationally stationary structure providing cover means for said channels, a series of peripherally spaced rotationally stationary bafile means ex- "tending into said channels for subdividing the constituting a minor portion of the circumier- 1 ence of the channel, and ports in said cover means opening into said channels adjacent to and on the peripherally opposite sides of each of said baffle means for flow of fluid into and out of each of said sections.
  • Apparatus comprising a rotatably mounted body having a plurality of relatively deep and narrow circular open channels concentric with the axis of rotation of the body, rotationally stationary structure providing cover means'for said channels, a plurality of peripherally spaced rotationally stationary obturating baifles' extending into said channels for subdividing the same into a plurality of sections, ports in said cover means opening into said channels adjacent to and on the peripherally opposite sides of each of said bafiies and guide baffles extending into said channels and terminating short of the bottoms thereof for guiding fluid flowing through at least certain of said ports.
  • Apparatus comprising a rotatably mounted body having a plurality of relatively deep and narrow circular open channels concentric with the axis of the rotation of the body, a rotationally stationary wall structure providing cover means of said channels, a plurality of peripherally spaced rotationally stationary obturating baffles extending into said channels for subdividing the same into a plurality of sections, ports opening through said wall structure adjacent to and on the peripherally opposite sides of each of said obturating baffles for providing communication between each of said sections and the ambient atmosphere, whereby to cause air to be drawn by rotation of the body into each of said sections through one of the ports communicating with the section and constituting an inlet port and guidebafiles extending into said sections and terminatin short of the bottoms of the channels for guiding air drawn into said channels through said inlet ports; i ,c
  • Apparatus comprising a rotatably mounted body having a plurality of relatively deep and narrow. circular open channels concentric "with the axis of rotation of the body, rotationally sta tionary Wall structure providing cover means for said channels, a plurality of peripherally spaced rotationally stationary obturating bafiies extend ing into said channels for subdividing the same into a plurality of sections and ports opening through said wall structure to provide communis cation between the end portions of each of said sections and theambient atmosphere, whereby to cause air to be drawn into each of said sections through one of said ports and ejected from the section through the other of said ports by rotation of said body.
  • Apparatus comprising a rotatably mounted body having a plurality of circular open chan! nels concentric with the axis of rotation of the body, rotationally stationary structure providing cover means for said channels, rotationally-stationary Iobturating bafiles extending into said channels, ports in said stationary housing opening into said channels adjacent to and on the opposite sides of each of said baffles for flow of fluid into and out of each of said channels, and means for forcing fluid through certain of said ports to flow through said channels in the direction counter to the direction of rotation of said body,
  • Apparatus comprising a rotatably mounted body having a plurality of relatively deep and narrow circular open channels concentric with the axis of rotation of the body, a rotationally stationary wall structure providing cover means for said channels, and a plurality of peripherally spaced rotationally stationary obturating bafilesextending into said channels for subdividing the same into a plurality of sections, openings in said cover means providing inlet and outlet ports for each of said sections at the respective ends thereof, a fan, and conduit means for connecting the discharge side of'said fan with each of said inlet ports.
  • Apparatus comprising a rotatably mounted body havinga plurality of external substantially radial and relatively narrow and deep openchan nels concentric with the axis of the rotation of the body, a rotationally stationary housing en-- circling said bodyand providing a cover wall closely adjacent to the outer periphery of saidchannels, a plurality of peripherally spaced openings in said housing providing communication with said channels and frame members removably secured to said housing at said openings,
  • each of said members carrying an ob-turating bafiie comprising a plurality" of fingers located to extend into said channels when the member is in assembled position and said bafile being located with respect to the perimeter of the frame to provide a port communicating with said channels on each side of the bafiie member.
  • said wall terminating peripherally short of each of said battles to provide an inlet port and an outlet port communicating respectiyely with the opposite ends of said section, and a guide baffle projecting into said section and terminating short of the bottom of the channel for guiding fiuid flowing-through one of said ports.
  • A- hydraulic power transmission comprising a rotating casing structure providing a Working chamber for circulation of power-transmitting fluid, said casing having a plurality of external circular cooling fins and grooves concentrio with the axis of rotation of the casing, and means for creating flow of gaseous cooling fluid in -said grooves comprising a plurality of elements extending intoeach groove at peripherally spaced places and mounted to have relative rotation with respect to said fins for interrupting continuous rotary flow of the cooling fluid within the grooves and forcing thefluid-at the places of interruption out of the grooves, whereby to create a plurality of separate streams of cooling fluid flowing into and out of each groove, each of 'said streams being confined to a portion of the circumference of the groove.
  • Apparatus comprising a rotatably mounted body having a plurality of circular open channels concentric with the axis of rotation of the body, rotationally stationary structure providing cover means for said channels, rotationally stationary baffle means extending into said channels to provide obstructions therein and port openings in said structure communicating with the open faces of said channels adjacent to and on the opposite sides of said bafiie means for flow of fluidinto said channels on one side of said baffle means and out of said channels on the other side of said baffle means.
  • Apparatus comprising a rotatably mounted body having a plurality of circ'ularjopen channels concentric with the axis of rotation of the body..'
  • a plurality of rotationally stationary bafile means located in peripherally spaced relation and each comprising a plurality of fingers extending into and substantially filling the cross sections of said channels to provide obstructions therein dividing the channels into a plurality of sectorlike parts
  • rotationally stationary structure providing cover means for each of said parts, said cover means being spaced peripherally from said baflie means to provide inlet and outlet ports communicating with the open faces of said channels at the respective ends of each of said sectorlike parts.
  • Apparatus comprising a rotatably mounted casing having a plurality of external closely spaced circular ribs and intervening open grooves concentric with the axis of rotation of the casing, a rotationally stationary outer housing having a wall portion encircling said ribs and providing cover means overlying the open faces of said grooves, a plurality of baflle means carried by said housing at peripherally spaced places thereon, each of said baffle means comprising a plurality of fingers extending into said grooves to divide the grooves into sector-like parts and ports in said wall portion on each side of each of said baffle means to provide communication between the grooves and the ambient atmosphere at each end of each of said sector-like parts.
  • a hydraulic power transmission comprising a rotating casing containing working fluid requiringto be cooled during the normal operation of the transmission, said casing including a plurality of external circular fins and open grooves concentric with the axis of rotation of the casing and having a depth at least several times their width, an outer rotationally stationary housing having a wall portion concentrically encircling said grooves and providing cover means therefor, and a plurality of baflle means carried by said housing in peripherally spaced relation, each of said baffle means comprising a plurality of elongated fingers extending into said grooves to substantially fill the cross sections thereof and provide obstructions dividing the several grooves into sector-like parts, the cover means for each of said parts being peripherally spaced from each of said baflie means to provide inlet and outlet ports through said wall adjacent to the baflle means for flow of cooling air from the ambient atmosphere in separate streams through each of the sector-like passages formed by the walls of the grooves and said cover means.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Frames (AREA)
US226581A 1947-06-11 1951-05-16 Means for effecting heat exchange between a rotating solid body and a gaseous medium, particularly for cooling fluid transmissions with rotating casings Expired - Lifetime US2611248A (en)

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SE967485X 1947-06-11

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US226581A Expired - Lifetime US2611248A (en) 1947-06-11 1951-05-16 Means for effecting heat exchange between a rotating solid body and a gaseous medium, particularly for cooling fluid transmissions with rotating casings

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US (1) US2611248A (de)
AT (1) AT177625B (de)
DE (1) DE856541C (de)
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GB (1) GB667565A (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2680954A (en) * 1952-03-01 1954-06-15 Studebaker Corp Torque converter cooling system
US3042366A (en) * 1958-05-05 1962-07-03 Holmquist Ernst Rudolf Magnus Axial flow gas turbine
US3045430A (en) * 1960-09-20 1962-07-24 John E Becker Fluid couplings
US3180569A (en) * 1962-05-21 1965-04-27 Gast Mfg Corp Cooled rotary pump
US3844341A (en) * 1972-05-22 1974-10-29 Us Navy Rotatable finned heat transfer device
US3918558A (en) * 1973-05-18 1975-11-11 Clyde C Bryant Frictionless brake
US4376370A (en) * 1979-09-29 1983-03-15 Daihatsu Motor Co., Ltd. Power transmission for an automobile
US20050022974A1 (en) * 2002-12-19 2005-02-03 Forced Physics Corp. Heat exchange technique
US20070009346A1 (en) * 2004-08-30 2007-01-11 Scott Davis Single-molecule systems
US20070029498A1 (en) * 2005-08-04 2007-02-08 Forced Physics Llc, A Limited Liability Company Enhanced heteroscopic techniques
US20070029952A1 (en) * 2005-08-04 2007-02-08 Scott Davis Coherent emission of spontaneous asynchronous radiation

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1037215B (de) * 1951-05-16 1958-08-21 Svenska Rotor Maskiner Ab Vorrichtung zur Kuehlung oder Erwaermung eines umlaufenden Gehaeuses, beispielsweise einer hydraulischen Kupplung oder eines Drehmomentwandlers
DE1021870B (de) * 1951-05-16 1958-01-02 Svenska Rotor Maskiner Ab Vorrichtung zur Kuehlung von umlaufenden Gehaeusen
DE1016729B (de) * 1951-05-16 1957-10-03 Svenska Rotor Maskiner Ab Vorrichtung zur Waermeuebertragung von einem gasfoermigen oder fluessigen Medium zu einem anderen vermittels eines umlaufenden Rotors
DE1096126B (de) * 1954-08-28 1960-12-29 Joachim Huhnen Dipl Ing Bremstrommel
DE1169728B (de) * 1956-07-02 1964-05-06 Eta Corp G M B H Foettinger-Kupplung
DE4117151A1 (de) * 1991-05-25 1992-11-26 Bayerische Motoren Werke Ag Hydrodynamische drehmomentuebertragungseinrichtung
DE19614589A1 (de) * 1996-04-12 1997-10-16 Voith Turbo Kg Hydrodynamische Kupplung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR744956A (de) * 1933-04-29
US1906520A (en) * 1931-06-24 1933-05-02 Int Motor Co Brake cooling mechanism
US2088967A (en) * 1936-08-10 1937-08-03 Kelsey Hayes Wheel Co Device for cooling brake drums
US2197232A (en) * 1936-01-18 1940-04-16 Clarence G Wood Clutch plate
US2253877A (en) * 1941-01-24 1941-08-26 Kenneth Lynn Frazier Automatic transmission

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR744956A (de) * 1933-04-29
US1906520A (en) * 1931-06-24 1933-05-02 Int Motor Co Brake cooling mechanism
US2197232A (en) * 1936-01-18 1940-04-16 Clarence G Wood Clutch plate
US2088967A (en) * 1936-08-10 1937-08-03 Kelsey Hayes Wheel Co Device for cooling brake drums
US2253877A (en) * 1941-01-24 1941-08-26 Kenneth Lynn Frazier Automatic transmission

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2680954A (en) * 1952-03-01 1954-06-15 Studebaker Corp Torque converter cooling system
US3042366A (en) * 1958-05-05 1962-07-03 Holmquist Ernst Rudolf Magnus Axial flow gas turbine
US3045430A (en) * 1960-09-20 1962-07-24 John E Becker Fluid couplings
US3180569A (en) * 1962-05-21 1965-04-27 Gast Mfg Corp Cooled rotary pump
US3844341A (en) * 1972-05-22 1974-10-29 Us Navy Rotatable finned heat transfer device
US3918558A (en) * 1973-05-18 1975-11-11 Clyde C Bryant Frictionless brake
US4376370A (en) * 1979-09-29 1983-03-15 Daihatsu Motor Co., Ltd. Power transmission for an automobile
US20050022974A1 (en) * 2002-12-19 2005-02-03 Forced Physics Corp. Heat exchange technique
WO2004057260A3 (en) * 2002-12-19 2005-08-25 Forced Physics Corp Heat exchange technique
US20070243059A1 (en) * 2002-12-19 2007-10-18 Forced Physics Llc Techniques for movement through gas or liquid or liquid without a velocity boundary layer
US20070009346A1 (en) * 2004-08-30 2007-01-11 Scott Davis Single-molecule systems
US20070029498A1 (en) * 2005-08-04 2007-02-08 Forced Physics Llc, A Limited Liability Company Enhanced heteroscopic techniques
US20070029952A1 (en) * 2005-08-04 2007-02-08 Scott Davis Coherent emission of spontaneous asynchronous radiation

Also Published As

Publication number Publication date
DE856541C (de) 1953-03-19
FR967485A (fr) 1950-11-03
AT177625B (de) 1954-02-25
GB667565A (en) 1952-03-05

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