US3269370A

US3269370A - Rotor cooling means for rotary mechanism

Info

Publication number: US3269370A
Application number: US318423A
Authority: US
Inventors: Paschke Hanns-Dieter; Hoffmann Gunter
Original assignee: Wankel GmbH; NSU Motorenwerke AG
Current assignee: Wankel GmbH; Audi AG
Priority date: 1962-11-28
Filing date: 1963-10-23
Publication date: 1966-08-30
Anticipated expiration: 1983-08-30
Also published as: DE1187423B; GB1032399A

Description

g- 1966 HANN$-D|ETER FASCHKE ETAL 3,269,370

ROTOR COOLING MEANS FOR R0'1z-.;'-I1' MECHANISM Filed Oct. 23, 1963 4 Sheets-Sheet l INVENTORS HANNEI- DIETER PAEEHKE HUNTER HDFFMANN BY ATTDRNEY gi966 HANNS-DIETER PASCHKE ETAL 3, 69,370

ROTOR COOLING MEANS FOR ROTARY MECHANISM Filed 001;. 23, 1963 4 Sheets-Sheet 2 INVENTORS HANNEEDIETER PAEEHKE E-UNTEFQ HDFFMANN BYWQLLM ATTURNEY Aug. 30, 1966 HANNS DlETER PASCHKE ETAL.

ROTOR COOLING MEANS FOR ROTARY MECHANISM Filed Oct. 23, 1963 4 Sheets-Sheet 5 INVENTORS -D|ETER FAEEHKE.

HANNEJ I BY EL JNTEFQ HDFFMANN ATTURNEY Aug. 30, 1966 HANNS-DIETER PASCHKE ETA]. 3,269,370

ROTOR COOLING MEANS FOR ROTARY MECHANISM Filed Oct. 23, 1963 4 SheetsSheet 4.

EUNTER HDF FMANN L PkEM-ML ATTORNEY United States Patent 0 3,269,370 RUTOR COULENG MEANS FOR ROTARY MECHANISM Haunts-Dieter Paschke, Neckarsulin, Wurttemherg, and

Giinter Hoifmann, Neudenau (Jagst), Germany, assignors to NSU Motorenwerke Aktiengesellscliait, Neckarsulrn, Germany, and Wankel G.m.b.H., Lindau (Rodensee), Germany Filed Oat. 23, 1963, er. No. 318,423 Claims priority, application Germany, Nov. 28, 1962, N 22,416 7 @laims. (Cl. 123--8) This invention relates to rotary mechanisms and in particular to a novel and improved means for discharging the cooling fluid from the interior of the rotor in said mechanisms. A rotary mechanism of the type embodying the present invention is disclosed in US. Patent 2,988,065 issued to Felix Wankel et al.

In general, rotary mechanisms of this type comprise an outer body formed by a peripheral wall interconnected by a pair of parallel end walls thereby defining a cavity whose peripheral shape preferably is basically an epitrochoid. A rotatably mounted rotor is supported on an eccentric shaft within the cavity with the center or rotor axis being eccentric relative to the shaft axis and the outer surface of the rotor defining a plurality of circumferentially-spaced apex portions having means for sealing engagement with the inner surface of the peripheral wall. The relationship between the rotor apex portions and the inner surface of the outer body peripheral wall is such that a plurality of working chambers is formed therebetween which upon relative rotation of the outer body and rotor vary in volume. In the case of a rotary internal combustion engine an intake port may be provided for admitting air or a fuel-air mixture to the working chambers of said engine, an exhaust port may be provided for expelling the expanded gases from said engine and an ignition means may be provided for igniting the fuelair mixture whereupon the stages of intake, compression, expansion and exhaust may be carried out. It should be understood however, that the invention may be embodied in various types of rotary mechanisms such as rotary pumps and fluid motors or the like.

A rotor cooling fluid discharge means has been previously disclosed in US. Patent 3,102,682, issued on September 3, 1963, and assigned to the same assignee as the present application which cooling fluid discharge means comprises a stationary disc attached to the interior of the rotor which has radial channels for removing the fluid from the rotor interior. It has been found however, that such a structure presents some difficulties in assembling the engine and its application is limited to particular types of rotors wherein it is possible to house such a structure.

The present invention has for its purpose providing an improved cooling discharge means which has general application to rotary mechanisms independent of the shape or type of rotor used in said mechanisms. The invention is generally carried out by providing a cooling fluid col- 'lecting member which is attached to the eccentric shaft for rotation therewith relative to the rotor such that each cooling compartment of the rotor periodically moves into communication with the cooling collecting pockets of said cooling collecting member. The collecting member is located diametrically opposite to the point of maximum eccentricity of the eccentric provided on the engine shaft and has at least one collecting pocket which has an opening which periodically communicates with rotor openings communicating with the compartments in the rotor interior as the rotor rotates relative to the eccentric and shaft. The invention furher makes use of the alternately directed centrifugal forces which are brought about during the rotation of the rotor and the eccentric whereby the 3,2693% Patented August 36, 1966 cooling fluid within the interior of the rotor is periodically directed radially inward where it is collected in the collecting pockets and discharged from the engine. When the cooling fluid enters the collecting pockets it is subjected to the acceleration forces resulting from the rotation of the eccentric so that the cooling fluid is thrown against a wall of the collecting pocket whereby it is conveyed along said wall in an axial direction for discharge.

Accordingly it is one object of the invention to provide a novel and improved cooling fluid discharge means for a rotary mechanism.

It is another object of the invention to provide a novel and improved cooling fluid discharge means for a rotary mechanism wherein a cooling fluid collecting means is connected to the eccentric shaft of said mechanism for directing the discharge cooling fluid from said rotary mechanism.

it is a further object of the invention to provide a novel and improved cooling means for a rotary mechanism wherein means are provided for supplying cooling fluid to the interior of the rotor and said rotor has a motion such that the cooling fluid is periodically thrown radially inwardly in said rotor and means are provided for discharging said cooling fluid out of said rotor and out of said mechanism in an axial direction.

Other objects and advantages of the invention will be apparent upon reading the following detailed description of the invention in connection with the accompanying drawing in which:

FIG. 1 is a sectional view of a rotary mechanism embodying the invention taken along lines 11 of FIG. 2;

FIG. 2 is a sectional view taken along line 2-2 of FIG. 1;

FIG. 3 is an enlarged sectional View of a portion of the rotary mechanism of the invention showing a second embodiment thereof but with the gearing and cooling fluid supply and discharge means being on opposite side of the rotary mechanism from that shown in FIGS. 1 and 2;

FIG. 4 is a view similar to FIG. 3 showing another embodiment of the invention;

FIG. 5 is a view similar to FIG. 3 showing a further embodiment of the invention;

FIG. 6 is a view similar to FIG. 3 showing still another embodiment of the invention; and

FIG. 7 is an enlarged view of the cooling collecting member of the embodiment of FIG. 6 as viewed in the direction of arrow B.

Referring to FIGS. 1 and 2, there is shown therein a rotary mechanism generally designated at 10 which comprises an outer body formed by a peripheral wall 12 interconnected with a pair of

end housings

14 and 16. As illustrated in FIG. 2, the contour of the inner surface of the peripheral wall 12 has a multi-lobed profile which preferably is basically a two-lobed epitrochoid. A shaft 18 is rotatably supported within the outer body by suitable bearings, as illustrated, with said shaft 18 having an eccentric portion 20 formed thereon with the center or axis A of the eccentric portion 20 being parallel to but spaced from the center or axis A of the shaft 18. Rotatably supported on the eccentric portion 20 is an inner body or rotor 22 with a suitable bearing 24, such as a sleevetyped bearing, interposed therebetween for supporting said rotor on the eccentric portion 20.

The rotor 22 has axially-spaced

end faces

26 and 28 disposed adjacent to the outer

body end walls

14 and 16 and a rotor peripheral Wall St) having a plurality of circumferentially-spaced apex portions 32 with said apex portions preferably being one more number than the number of said outer body lobes. The rotor apex portions 32 are in continuous engagement with the mult-i-lobed inner surface of the outer body peripheral wall 12 to form a plurality (3 in the embodiment illustrated) of

working chambers

34a, 34b and 34c between said two bodies which vary in volume upon relative rotation of the inner and outer bodies during operation. Between its apex portions 32 the profile of the outer surface of the inner body or rotor 22 is such as to operate in an interference free manner relative to the outer body. Thus, as illustrated, the outer surface of the inner body as a triangular profile with outwardly arched working

faces

36a, 36b and 360 with each said rotor working face forming a wall of its associated working chamber and during rotor rotation each said working face approaches and recedes from the peripheral wall 12 of the outer body to vary the volume of its associated working chamber.

In the embodiments illustrated, the outer body is stationary while the inner body or rotor 22 is journaled on the eccentric portion of the shaft 18 which rotates at a ratio of 3:1 with respect to said inner body or rotor 22. During engine operation, the rotor 22 has a planetary motion (counterclockwise in FIG. 1) about the axis A of the shaft 18 and the outer body whereupon

working chambers

34a, 34b and 340 vary in volume such that in each rotation of the rotor about the axis of the outer body each chamber has two positions of minimum volume and two positions of maximum volume. Seal members 38 are provided in grooves in each of the apex portions 32 of the rotor 22 for sealing engagement with the inner surface 40 of the peripheral wall 12 with said seal members 38 cooperating with seal members 42 in each of the

side faces

26 and 28 of the rotor which seal members 42 are in sealing engagement with the inner surfaces or faces 44 and 46 of the

end walls

14 and 16 and intermediate seal bodies 48 are provided for cooperative sealing engagement between the apex seal members 38 and the rotor side face seal elements 42 to thereby form a continuous seal for each of the

working chambers

34a, 34b and 340.

An internally toothed gear 58 is suitably connected to the rotor 22 or may be formed from a portion of one of the end walls of the rotor as illustrated, and said gear '50 engages a suitable externally toothed gear 52 which is fixed to the outer body in a known manner. The gears 50 and 52 cooperate to guide the rotor in tracing its epitrochoidal path.

An intake port 54 is provided in the peripheral wall 12 adjacent one of the lobe junctions for admitting air or a fuel-air mixture to supply the working chambers of the rotary mechanism and an exhaust port 56 is provided in the peripheral wall 12 adjacent the opposite side of the same lobe junction for expelling the burnt gases or expanded gases from the rotary mechanism. When the rotary mechanism takes the form of a rotary combustion engine, as illustrated, an ignition means, which may be a spark plug 58, is provided adjacent the other of the lobe junctions for iginting the fuel-air mixture. Therefore it can be seen that the stages of intake, compression, expansion and exhaust may be carried out.

As further shown in FIGS. 1 and 2, the rotor 22 is provided with a plurality of internal compartments 60 spaced around the periphery of said rotor with each said compartment 60 being provided with an inlet opening 62 for supplying a cooling fluid to a rotor compartment 60. Suitable means such as a passageway 64 in end wall 14 connected to an oil pump (not shown) may be provided for supplying oil to an annular passageway or cavity 66 between the rotor 22 and said end wall 14. It should be understood however that other means may be provided for supplying oil to the annular cavity 66 and that the inlet opening 62 may be located at other regions in the rotor end wall 26. For example, oil may be supplied to the annular cavity 66 thru passageways in the engine shaft 18 or the eccentric portion 20. Oil seals 68 are provided radially outwardly of the entrance portion of the inlet opening 62 so that the cooling fluid is prevented from leaking out into the working chambers. As explained in the aforementioned US. Patent No. 3,102,682, during rotation of the rotor 22 and the eccentric portion 20 the oil in the annular cavity 66 is acted upon by acceleration forces whereby the oil is thrown radially outwardly into the inlet opening 62 for supplying the oil to the compartments 6%) for cooling the walls of the rotor. These acceleration forces periodically reverse so that during portions of rotation of the rotor the oil is thrown radially outwardly into said compartments and during other portions of rotor rotation the oil is thrown radially inwardly in said compartments.

As stated above, the purpose of the invention is to provide a means for discharging cooling fluid from the compartments 60 so that the heated cooling fluid will be removed from said compartments in order that fresh cooling fluid may be supplied thereto and the cooling efficiency will thereby be kept at a maximum level. As illustrated in the embodiment shown in FIGS. 1 and 2, each of the rotor compartments 6!) is provided with an outlet opening 70 adjacent the radially inner hub of said rotor which communicates with an outlet opening 72 for discharging the cooling fluid from said rotor compartments 60. Therefore, when the acceleration forces are such that the cooling fluid is thrown radially inwardly in said rotor compartments 60 it will be transmitted out of said rotor thru the openings 78 and '72. A cooling collecting member or disc 74 is connected to the eccentric or the eccentric shaft 18 by means of a key or spline 76 so as to rotate with said shaft 18 and eccentric portion 20 relative to the rotor 22. The cooling collecting member 74 is provided with a plurality of cutouts or collecting pockets 78 with said collecting pockets being disposed in the region of the cooling collecting member which is diametrically opposite to the point of maximum eccentricity of the eccentric portion 20. It Will be apparent that the rotor 22 will rotate relative to the cooling collecting member 74 and the cooling collecting member 74 is disposed with relation to said rotor 22 so that the collecting pockets will be disposed adjacent to the outlet opening 72 of .a rotor compartment when the acceleration forces are such as to throw the cooling fluid radially inwardly. In other words, the arrangement is such that the cooling collecting pockets '78 and the outlet openings 72 of some of the rotor compartments 60 will be in communication at a region substantially diametrically opposite to the point of maximum eccentricity at which time the acceleration forces acting on the cooling fluid within these rotor compartments 68 will be directed radially inwardly to throw the cooling fluid out through the outlet openings 72 into the cooling collecting pockets 78 (FIG. 2). Therefore, the cooling fluid will flow from the rotor outlet opening 72 into the cooling collecting pocket 78 positioned adjacent thereto. As illustrated in FIGS. 1 and 2, the cooling collecting pockets are sickle-shaped or crescent-shaped so that portions thereof may extend over the extension of the rotor or portion of the rotor having the outlet openings 72.

When the cooling fluid enters the cooling collecting pockets 78 it will be acted upon by changing acceleration forces to be thrown radially outwardly against the radially outward wall 80 of said cooling collecting pockets '78. The radially outward directed acceleration forces will push the cooling fluid against the wall 80 and force the oil to flow axially in both directions.

When the cooling fluid is in said pockets 78 it will be prevented from flowing axially back toward the rotor compartments by a wall 82 which extends in a radial direction. Since the cooling fluid is prevented from flowing axially backward toward the compartments 60 as the pressure due to the radially outwardly directed acceleration forces and the accumulation of cooling fluid in its pockets 78 builds up the cooling fluid can only flow in an axial direction away from the compartments 60 and will be carried into collecting or discharge passages 84 which may be suitably connected to a recirculating pump (not shown) for recirculating the cooling fluid back thru the engine after it has been cooled. The cooling collecting member 74 is also provided with a wall 86 which is bent radially outwardly for guiding the cooling fluid into the passage 84 and for preventing the cooling fluid from flowing into the space between the rotor 22 and the housing end wall 28 as it leaves the collecting pockets 78. It would be apparent therefore that a novel means is provided for discharging the cooling fluid from the rotor and outer body in a rotary mechanism and the structure has the advantage of being adaptable to a plurality of rotor structures and types. The discharging structure is relatively small and occupies little space in the rotary mechanism and therefore does not interefer in the primary operational functions of said rotary mechanism.

FIG. 3 shows a second embodiment of the invention with the cooling collecting member located on the opposite side of the mechanism and the cooling fluid supply means (not shown) also being located on the opposite side of the rotary mechanism from that shown in FIG. 1. The cooling collecting member 86 in the embodiment of FIG. 3 has an axially extending hub portion 88 which also serves as a bearing means for the shaft 18 in the housing end wall 14. The hub portion 88 of the cooling collecting member 86 is provided with an axially extending passageway 90 for discharging the cooling fluid from the cooling collecting pockets 78 of said member 86 for discharging the cooling fluid from the rotary mechanism. The manner of operation of this embodiment is otherwise the same as that described in connection with the above embodiment shown in FIGS. 1 and 2.

In the embodiment shown in FIG. 4 the cooling collecting pockets 78 are provided in an extension of the eccentric portion 20. As in the embodiments of FIGS. 1 and 2 the cooling collecting pockets 78 are sickle-shaped or cresent-shaped for receiving the extension portion of the rotor containing the outlet opening 72. The extension of the eccentric portion having the cooling collecting pockets 78 is provided with a radially extending wall portion 92 for preventing backflow of the cooling fluid between the rotor and eccentric and an axial extending wall 94 for guiding cooling fluid axially into a passageway 96 provided in the eccentric portion for discharging the cooling fluid from the rotor and out of the engine. An outlet opening 98 is provided in the eccentric portion and communicates with the axially extending passageway 96 whereby the cooling fluid will be discharged into a discharge cavity 100 provided in the end wall 16 of the housing of the rotary mechanism. Again the manner of operation is similar to that described in connection with FIGS. 1 and 2.

The embodiment of FIG. 5 is also substantially similar to that of FIGS. 1 and 2 however, in the embodiment of FIG. 5 instead of having an axially extending wall similar to wall 80' of FIGS. 1 and 2 a wall 102 is provided which runs or is directed obliquely in an axially outward direction and is also the axial limiting wall of the collecting pockets 78. The collecting pockets 78 in this embodiment are continued into a channel 104 in the hub portion 11% of the cooling collecting member 108, as illustrated. In addition, a separate ring 110 or an extension of the rotor end wall is provided and is positioned against an end wall of the rotor 22 and a sealing ring 112 is provided between ring 110 and the member 108 for preventing the cooling fluid from leaking outwardly between the rotor 22, the wall 14 and into the working chambers. In this embodiment the cooling fluid is prevented from flowing back toward the rotor compartments in an axially direction due to the slope of the wall 102.

In the embodiment shown in FIGS. 6 and 7 a cooling collecting member or disc 114 is provided and is fastened to the eccentric portion 20 by screws 116. The cooling collecting member 114 is provided with a hub portion 118 which extends axially beyond the housing side wall portion 44 and the inner surface 120 thereof forms the axially extending wall of the cooling collecting pockets 6 78. As illustrated, the wall portion slopes radially outwardy so that it functions for guiding the cooling oil axially outwardly so that it may be discharged from the mechanism and for preventing flow axially back toward the rotor compartments.

During operation when a rotor compartment 60 is disposed opposite to the point of maximum eccentricity of the eccentric portion 20, the cooling fluid therein is thrown radially inwardly and passes out of the outlet opening 72 in the rotor 22 which opening 72 is provided in an extension of the rotor 22 which covers the cooling fluid collecting pockets 78. The cooling fluid then flows into a space 122 where during rotation of the eccentric it will be thrown against the wall surface 120 and due to the slope of this wall it will flow axially outwardly away from the rotor 22. As illustrated, the wall 120 extends axially over the extension portion of the rotor having the outett opening 72 therein. A seal ring 124 is disposed between the collecting member 114 and the rotor 22 for preventing the cooling fluid from passing outwardly into the working chambers as was discussed in the above embodiments. As the cooling fluid flows along the sloping wall 126 it will be deposited in an axial extending passageway 126 for discharge and recirculation than the engine. As in the previous embodiment the manner of operation of the structure of FIGS. 6 and 7 is similar to that disclosed in relation to FIGS. 1 and 2. It should also be understood that, in the embodiments of FIGS. 3-7, the cooling fluid may be fed to the rotor compartments 60 in the same manner as that shown in FIGS. 1 and 2.

While the invention has been set forth in detail in the above description it should be understood that the invention is not to be limited by the specific details set forth therein and that various modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the following claims.

What is claimed is:

1. A cooling fluid discharge means for a rotary mechanism having an outer body including a peripheral housing interconnected with a pair of end housings with the profile of said peripheral housing being preferably bas ically an epitrochoid, a shaft supported coaxially with said outer body and having an eccentric portion thereon, a rotor supported on said eccentric portion with the axis of said rotor being parallel to said housing axis but spaced therefrom, said rotor being rotatable relative to said eccentric portion and said housing axis and thereby describing a planetary motion such that acceleration forces are produced in said rotor which successively change direction, said rotor being hollow and having a plurality of cooling compartments therein with inlet and outlet openings in each said compartment for receiving and draining a cooling fluid in and out of said compartments, said cooling fluid discharge means comprising; a cooling fluid collecting member connected for rotation with said shaft relative to said rotor, said cooling fluid collecting member including cooling fluid collecting means having a plurality of cooling fluid collecting pockets surrounding at least a portion of said shaft, said cooling fluid collecting pockets being disposed in axially spaced relationship with said shaft eccentric portion and substantially diametrically opposite to the maximum eccentricity region of said shaft eccentric portion, said cooling fluid collecting pockets being further disposed such that during relative rotation between said cooling fluid collecting member and said rotor, said cooling fluid collecting pockets will be positioned adjacent a rotor compartment outlet opening when the acceleration forces are acting radially inwardly relative to said rotor compartment out let opening whereby the cooling fluid will be discharged through said rotor compartment outlet opening into said cooling fluid collecting means for discharging the cooling fluid from the rotary mechanism through said cooling fluid collecting member.

2. A cooling fluid discharge means as recited in claim 1 wherein said cooling fluid collecting pockets are formed in an axially extending portion of said eccentric portion and an axially extending discharge passage being provided in said eccentric portion for each cooling fluid collecting pocket for guiding said cooling fluid out of said rotary mechanism. v

3. A cooling fluid discharge means as recited in claim 1 wherein each said cooling fluid collecting pocket includes an axially extending wall extending from a region adjacent said rotor cooling compartment openings toward a cooling fluid discharge passage in a housing end wall for receiving cooling fluid from said rotor cooling compartment outlet openings and for guiding the cooling fluid from said mechanism and including wall means for preventing flow of said cooling fluid axially back toward said rotor cooling compartments when said cooling fluid is in said cooling collecting pockets.

4. A cooling fluid discharge means as recited in claim 3 wherein the cooling fluid collecting member includes an axially extending hub portion surrounding a portion of said shaft and said hub portion having an axially extending discharge passage therein communicating with the cooling fluid collecting pocket adjacent said axial extending wall and said hub portion serving as a bearing for supporting said shaft in said housing.

5. A cooling fluid discharge means as recited in claim 3 wherein at least a portion of said axial extending wall has an inner surface which slopes in a radially outward direction toward the adjacent housing end wall.

6. A cooling fluid discharge means as recited in claim 5 further comprising an oil seal ring positioned radially outwardly of said cooling fluid collecting pockets for sealing engagement between-said cooling collecting member and said rotor so that cooling fluid is prevented from flowing radially outwardly between said rotor and an adjacent end housing.

7. A cooling fluid discharge means as recited in claim 3 wherein said wall means comprises a radially extending wall in each said cooling fluid collecting pocket with said radially extending wall extending from said axially extending wall and being positioned for preventing cooling fluid from flowing back toward the rotor cooling compartments when said cooling fluid is discharged into said cooling fluid collecting pockets.

References Cited by the Examiner UNITED STATES PATENTS 3,042,009 7/1962 Froede et al 1238 3,091,386 5/1963 Paschke 1238 X 3,102,682 9/1963 Paschke 123--8 X 3,168,237 2/ 1965 Paschke.

MARK NEWMAN, Primary Examiner.

SAMUEL LEVINE, Examiner.

F. T. SADLER, Assistant Examiner.

Claims

1. A COOLING FLUID DISCHARGE MEANS FOR A ROTARY MECHANISM HAVING AN OUTER BODY INCLUDING A PERIPHERAL HOUSING INTERCONNECTED WITH A PAIR OF END HOUSINGS WITH THE PROFILE OF SAID PERIPHERAL HOUSING BEING PERFERABLY BASICALLY AN EPITROCHOID, A SHAFT SUPPOSTED COAXIALLY WITH SAID OUTER BODY AND HAVING ECCENTRIC PORTION THEREON A ROTOR SUPPORTED ON SAID ECCENTRIC PORTION WITH THE AXIS OF SAID ROTOR BEING PARALLEL TO SAID HOUSING AXIS BUT SPACED THEREFROM, SAID ROTOR BEING ROTATABLE RELATIVE TO SAID ECCENTRIC PORTION AND SAID HOUSING AXIS AND THEREBY DESCRIBING A PLANETARY MOTION SUCH THAT ACCELERATION FORCES ARE PRODUCED IN SAID ROTOR WHICH SUCCESSIVELY CHANGE DIRECTION, SAID ROTOR BEING HOLLOW AND HAVING A PLURALITY OF COOLING COMPARTMENTS THEREIN WITH INLET AND OUTLET OPENINGS IN EACH SAID COMPARTMENT FOR RECEIVING AND DRAINING A COOLING FLUID IN AND OUT OF SAID COMPARTMENTS, SAID COOLING FLUID DISCHARGE MEANS COMPRISING; A COOLING FLUID COLLECTING MEMBER CONNECTED FOR ROTATION WITH SAID SHAFT RELATIVE TO SAID ROTOR, SAID COOLING FLUID COLLECTING MEMBER INCLUDING COOLING FLUID COLLECTING MEANS HAVING A PLURALITY OF COOLING FLUID COLLECTING POCKETS SURROUNDING AT LEAST A PORTION OF SAID SHAFT, SAID COOLING FLUID COLLECTING POCKETS BEING DISPOSED IN AXIALLY SPACED RELATIONSHIP WITH SAID SHAFT ECCENTRIC PORTION AND SUBSTANTIALLY DIAMETRICALLY OPPOSITE TO THE MAXIMUM ECCENTRICITY REGION OF SAID SHAFT ECCENTRIC PORTION, SAID COOLING FLUID COLLECTING POCKETS BEING FURTHER DISPOSED SUCH THAT DURING RELATIVE ROTATION BETWEEN SAID COLLING FLUID COLLECTING MEMBER AND SAID ROTOR, SAID COOLING FLUID COLLECTING POCKETS WILL BE POSITIONED ADJACENT A ROTOR COMPARTMENT OUTLET OPENING WHEN THE ACCELERATION FORCES ARE ACTING RADIALLY INWARDLY RELATIVE TO SAID ROTOR COMPARTMENT OUTLET OPENING WHEREBY THE COOLING FLUID WILL BE DISCHARGED THROUGH SAID ROTOR COMPARTMENT OUTLET OPENING INTO SAID COOLING FLUID COLLECTING MEANS FOR DISCHARGING THE COOLING FLUID FROM THE ROTARY MECHANISM THROUGH SAID COOLING FLUID COLLECTING MEMBER.