EP0159500A1 - A rotary eccentric machine for fluids - Google Patents
A rotary eccentric machine for fluids Download PDFInfo
- Publication number
- EP0159500A1 EP0159500A1 EP85102426A EP85102426A EP0159500A1 EP 0159500 A1 EP0159500 A1 EP 0159500A1 EP 85102426 A EP85102426 A EP 85102426A EP 85102426 A EP85102426 A EP 85102426A EP 0159500 A1 EP0159500 A1 EP 0159500A1
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- EP
- European Patent Office
- Prior art keywords
- fact
- bodies
- machine according
- rotation
- aperture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C5/00—Rotary-piston machines or engines with the working-chamber walls at least partly resiliently deformable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
- F04C29/0057—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions for eccentric movement
Definitions
- the present invention relates to a rotary eccentric machine for fluids (particularly air) which can be used as a vacuum pump or a compressor, or as a motor driven by fluid under pressure and developing mechanical force usable at an output shaft, and of the type including a working chamber enclosed between two bodies which are disposed eccentrically with respect to one another and having 'an inlet aperture and an outlet aperture in communication with this working chamber.
- Rotary machines for fluid have an outer fixed body and an inner body rotating eccentrically.
- Generally radially disposed blades slidable in suitable grooves formed either in the fixed outer body or in the rotatable inner body define variable volume chambers in the passage from the inlet aperture to the outlet aperture.
- the blades have to slide in such grooves and to rub on the rotatable or fixed body pressed either by springs or by centrifugal force.
- This sliding which causes a considerable purely mechanical loss, also results in wear of the elements of the machine after a time, and principally limits its speed of revolution and therefore its capacity.
- the object of the present invention is to provide a rotatable eccentric machine for fluids which overcomes the above indicated disadvantages, has a relatively simple and therefore economic structure but at the same time is reliable and of high performance and guarantees optimum operation.
- a rotary machine for fluids comprising a working chamber enclosed between two bodies disposed eccentrically with respect to one another and including at least an inlet aperture and an outlet aperture in communication with the said chamber, characterised by the fact that the said two bodies are both rotatable with respect to a fixed structure including the said apertures, and by the fact that the said two bodies are connected together by means of at least one associated connection and sealing element defining at least two variable volume chambers, such that a rotation imparted to one of the said two bodies is transmitted to the other.
- a closure plug 12 which carries an annular lip seal 13 which forms a seal on a section 14 of the shaft 7 which projects from the portion 9; another annular lip seal 15, also forming a seal on the shaft 7, is positioned at the inner end of the portion 9.
- a ring nut 17 which locks the two ball bearings 8 with the interposition of a spacer sleeve 18.
- a pulley 22 fixed for rotation with the shaft 7 is locked onto an outer portion 20 of the shaft 7 by means of a nut 21.
- leaf elements 24 Equally spaced around the circumference of the outer rotating body 4 are fixed the ends of four leaf elements 24 which, at the other end, are fixed, also equally spaced around the circumference, to the inner rotating body 3.
- these elements 24 are made of rubber vulcanised onto sheet metal leaves 25 the ends of which are folded in such a way as to create an associated enlarged head portion 26 which is inserted into an associated groove formed on the outer surface of the body 3 and on the inner surface of the body 4 parallel to their axes and of length equal to the axial length of the chamber 2.
- the inner rotating body 3 has a hollow cylindrical form with a lateral closure wall 30 facing the wall 6 and turns, by means of two ball bearings 31, on a shaft 32 which is offset with respect to the axis of the shaft 7.
- an annular lip seal 33 which forms a seal on the shaft 32, which latter is rigidly connected to a cover portion 34 which has an end wall 50 which closes the other end of the rotating bodies 3 and 4, and is fixed at its perimeter to the end of the annular portion 11 of the fixed support structure 10.
- this cover portion 34 there are formed, respectively, an intake duct 35 and a delivery duct 36 which have respective apertures, namely an induction aperture 37 and a delivery aperture 38 in the wall 50, which communicate with the working chamber 2.
- the fluid seal for the variable volume chambers 28 defined by the leaf elements 24 is obtained at the joined ends of the elements 24 by means of the continuous seal defined by the head portions 26 anchored in the associated grooves of the rotating bodies 3 and 4, whilst as far as the facing end walls 6 and 5 are concerned (with respect to which there is a relative rotation) there is a very small axial play (conveniently of the same order of magnitude as that of the axial play of the bearings 31 and 8).
- these leaf elements 24 can be made of ablating material so as to obtain, during operation, a dimensional self adjustment of their end surfaces for sealing on the walls 6 and 50.
- one or all of the facing surfaces of the bodies 3,4,34 in relative rotation can be ribbed so as to provide a seal of labyrinth type.
- ribs 52 formed on the facing surfaces of the wall 50 (fixed) and of the rotating body 3
- ribs 53 formed on the surface of the rotating body 3 which faces the smooth surface of the wall 6 of the rotating body 4.
- the surface of the rotating body 4 facing the fixed end wall 50 of the cover 34 can also be provided with such ribs.
- the machine 1 illustrated in Figure 3 differs from that of Figure 1 by the omission of the pulley 22 and the end portion 20 of the shaft 7, and by the presence of an electric stator winding 39 housed in the annular portion 11 oi the support structure 10, and a rotor winding 40 housed in the outer body 4.
- the supply to the stator winding 39 is provided via a contact block 41.
- the shaft 32 is fixed to a portion 43 having a knob 44, which can slide rectilinearly within a space 45 defined by the cover 34, between displacement guides belonging to the cover 34 itself.
- This cover 34 further has portions 46 which carries screws 47 for fixing the portion 43 in the desired position with respect to the cover portion 34.
- the machine 1 can also function as a motor if compressed air is supplied to the duct 36, which therefore expands in the working chamber 2 and flows out from the duct 35; in fact compressed air acts on the leaf elements 24 which thus drive the bodies 3 and 4 to rotate so that useful mechanical power is obtained at the shaft 7.
- the rotation at the outer body 4 is obtained by electric action via the stator winding 39, for which the rotor winding 40 constitutes the rotor of an electric motor.
- the position of the portion 43, and therefore the eccentricity of the inner rotating body with respect to the outer rotating body 4 can be modified and regulated via the screws 47 by varying the distance of the axis of the shaft 32 with respect to that of the shaft 7 such that the capacity of the machine 1 can be regulated.
- the embodiment of the machine 1 schematically illus- strated in Figure 4 differs from that of Figure 1 by the fact that the shaft 7 is a through shaft and is supported, as well as by the bearings 8, also by bearings 48 housed in the cover 34, still being fixed for rotation with the outer rotating body 4 (via a key 49) such that the region of connection for the external mechanical force (motor or load) can be obtained, as is more convenient, from the fixed side of the structure 10 or from the side of the cover 34.
- the embodiment of Figure 5 differs in the fact that the external mechanical force (drive or load) is applied to a shaft 32' which is rigidly connected to the inner rotating body 3, and projects externally from the cover side J4, being supported by bearings 31' housed in this cover 34.
- the outer rotating body 4 no longer has the shaft 7, but is supported by bearings 8 which are disposed on a fixed spindle 60 belonging to ; the structure 10.
- Figures 6 and 9 differs from that of Figure 1 by the fact that the intake duct 35' and the output duct 36' are formed in the portion 11 of the support structure 10 and in a radial and counterposed direction.
- the induction aperture 37' and delivery aperture 38' therefore open opposite the lateral surface of the outer rotating body 4 which has wide through slots 60 which form an outlet in a radial sense for the variable volume chambers 28.
- the fixed part 50 facing the rotating bodies 3 and 4 now no longer has the outlet apertures 37 and 38 and forms a fluid tight seal in the axial direction.
- Figure 7 differs from that of Figure 6 by the fact that the radial intake duct 35' and outlet duct 36' no longer open radially out from the support structure 10, but are bent in a direction parallel to the axis of the shaft 7 and open into an axial inlet duct 3 5 and an outlet duct 36 formed in the cover 34.
- Figure 8 differs from that of Figure 6 by the fact that the shaft 7' is a through shaft, and is supported as well as by the bearings 8 also by bearings 4 8' housed in the cover 34' which now has a structure similar to that of the support 10. Moreover the shaft 7' is no longer angularly fixed to the outer rotating body 4 but is fixed for rotation with and supports the inner rotating body 3. The outer rotating body 4 (eccentric with respect to the axis of the shaft 7') is supported by two bearings 80 housed in the support 10 and in the cover 34'.
- the configuration with the portion 43 for adjusting the eccentricity of the body 3 with respect to the body 4 can also be applied to the other embodiments described, and can also be formed in a different way, and further, the regulation of the eccentricity can be effected with an automatic control system rather than a manual one.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
A rotary machine (1) for fluid comprising a working chamber (2) enclosed between two bodies (3, 4) disposed eccentrically with respect to one another and including at least one intake aperture (37) and outlet aperture (38) in communication with this chamber (2).
The principle characteristic of this machine lies in the fact that these two bodies (3, 4) are both rotatable with respect to a fixed structure (10) including these apertures (37, 38), and in that these two bodies (3, 4) are joined together by means of at least one associated connection and sealing element (24) defining at least two variable volume chambers (28) such that a rotation imparted to one of the two bodies (4) is transmitted to the other (2).
Description
- The present invention relates to a rotary eccentric machine for fluids (particularly air) which can be used as a vacuum pump or a compressor, or as a motor driven by fluid under pressure and developing mechanical force usable at an output shaft, and of the type including a working chamber enclosed between two bodies which are disposed eccentrically with respect to one another and having 'an inlet aperture and an outlet aperture in communication with this working chamber.
- Rotary machines for fluid, of this type, have an outer fixed body and an inner body rotating eccentrically. Generally radially disposed blades slidable in suitable grooves formed either in the fixed outer body or in the rotatable inner body define variable volume chambers in the passage from the inlet aperture to the outlet aperture. In either case the blades have to slide in such grooves and to rub on the rotatable or fixed body pressed either by springs or by centrifugal force. This sliding, which causes a considerable purely mechanical loss, also results in wear of the elements of the machine after a time, and principally limits its speed of revolution and therefore its capacity.
- The object of the present invention is to provide a rotatable eccentric machine for fluids which overcomes the above indicated disadvantages, has a relatively simple and therefore economic structure but at the same time is reliable and of high performance and guarantees optimum operation.
- According to the present invention there is provided a rotary machine for fluids, comprising a working chamber enclosed between two bodies disposed eccentrically with respect to one another and including at least an inlet aperture and an outlet aperture in communication with the said chamber, characterised by the fact that the said two bodies are both rotatable with respect to a fixed structure including the said apertures, and by the fact that the said two bodies are connected together by means of at least one associated connection and sealing element defining at least two variable volume chambers, such that a rotation imparted to one of the said two bodies is transmitted to the other.
- For a better understanding of the present invention there will now be described, purely by way of non limitative example, several particular embodiments thereof with reference to the attached drawings, in which:
- Figure 1 is a side view, sectioned on the line I-I of Figure 2, of a first embodiment of the rotary machine formed according to the principles of the present invention;
- Figure 2 is a sectioned view taken on the line II-II of the machine of Figure 1;
- Figure 3 is a sectioned side view of a different embodiment of the machine of the present invention;
- Figures from 4 to 8 are sectioned schematic side views of further variations of embodiments of the machine of the present invention; and
- Figure 9 is a sectioned view taken on the line IX-IX of the machine of Figure 6.
- With reference to Figures 1 and 2, the rotary machine for fluids, of the present invention, indicated with the
reference numeral 1, comprises a workingchamber 2 which is enclosed between tworotating bodies body 4 has a hollow cylindrical form, and at one end has alateral closure wall 6 from which extends ashaft 7 which is supported byball bearings 8 from an end portion of afixed support structure 10 which widens in correspondence with the cylindrical portion of thebody 4 so as to contain it externally with a correspondingannular portion 11. At the outer end of theportion 9 there is positioned aclosure plug 12, which carries anannular lip seal 13 which forms a seal on asection 14 of theshaft 7 which projects from theportion 9; anotherannular lip seal 15, also forming a seal on theshaft 7, is positioned at the inner end of theportion 9. On a threadedsection 16 of theshaft 7 there is screwed aring nut 17 which locks the twoball bearings 8 with the interposition of aspacer sleeve 18. Apulley 22 fixed for rotation with theshaft 7 is locked onto anouter portion 20 of theshaft 7 by means of anut 21. - Equally spaced around the circumference of the outer rotating
body 4 are fixed the ends of fourleaf elements 24 which, at the other end, are fixed, also equally spaced around the circumference, to the inner rotatingbody 3. In particular, theseelements 24 are made of rubber vulcanised ontosheet metal leaves 25 the ends of which are folded in such a way as to create an associated enlargedhead portion 26 which is inserted into an associated groove formed on the outer surface of thebody 3 and on the inner surface of thebody 4 parallel to their axes and of length equal to the axial length of thechamber 2. Theseleaf elements 24, which have a joining and sealing function, therefore divide theworking chamber 2 into fourvariable volume chambers 28. - The inner rotating
body 3 has a hollow cylindrical form with alateral closure wall 30 facing thewall 6 and turns, by means of twoball bearings 31, on ashaft 32 which is offset with respect to the axis of theshaft 7. Within thebody 3 there is positioned anannular lip seal 33 which forms a seal on theshaft 32, which latter is rigidly connected to acover portion 34 which has anend wall 50 which closes the other end of therotating bodies annular portion 11 of thefixed support structure 10. In thiscover portion 34 there are formed, respectively, anintake duct 35 and adelivery duct 36 which have respective apertures, namely aninduction aperture 37 and adelivery aperture 38 in thewall 50, which communicate with theworking chamber 2. - The fluid seal for the
variable volume chambers 28 defined by theleaf elements 24 is obtained at the joined ends of theelements 24 by means of the continuous seal defined by thehead portions 26 anchored in the associated grooves of therotating bodies end walls 6 and 5 are concerned (with respect to which there is a relative rotation) there is a very small axial play (conveniently of the same order of magnitude as that of the axial play of thebearings 31 and 8). Conveniently theseleaf elements 24 can be made of ablating material so as to obtain, during operation, a dimensional self adjustment of their end surfaces for sealing on thewalls - Again for the purpose of improving the fluid tight seal, one or all of the facing surfaces of the
bodies body 3, whilst in the detail indicated B there can be seenribs 53 formed on the surface of the rotatingbody 3 which faces the smooth surface of thewall 6 of therotating body 4. Conveniently, only the surface of thewall 6 or both surfaces could be provided with such ribs. Thus the surface of the rotatingbody 4 facing the fixedend wall 50 of thecover 34 can also be provided with such ribs. - The
machine 1 illustrated in Figure 3 differs from that of Figure 1 by the omission of thepulley 22 and theend portion 20 of theshaft 7, and by the presence of an electric stator winding 39 housed in theannular portion 11 oi thesupport structure 10, and a rotor winding 40 housed in theouter body 4. The supply to thestator winding 39 is provided via acontact block 41. - Moreover the
shaft 32, rather than being fixed to thecover portion 34, is fixed to aportion 43 having aknob 44, which can slide rectilinearly within aspace 45 defined by thecover 34, between displacement guides belonging to thecover 34 itself. Thiscover 34 further hasportions 46 which carriesscrews 47 for fixing theportion 43 in the desired position with respect to thecover portion 34. - The operation of the rotary machine of the present invention described above is as follows.
- With reference to the embodiment of Figures 1 and 2, by exercising an action of mechanical rotation on the
pulley 22 theshaft 7 is made to rotate and therefore theouter body 4 is rotated ( in a clockwise sense in the case illustrated in Figure 2) which, via theelements 24, drives theinner body 3 to rotate, which turns on theshaft 32 in an eccentric manner with respect to theouter body 4. Theleaf elements 24, in their movement along the workingchamber 2, vary in configuration and curvature in such a way as to definevariable volume chambers 28 which expand in advance of theinduction aperture 37 and compress as they move towards thedelivery aperture 38 so as to draw fluid from theinduction duct 35 and send it to the delivery duct 36 (in this way themachine 1 can function as a vacuum pump or as a compressor). - The
machine 1 can also function as a motor if compressed air is supplied to theduct 36, which therefore expands in the workingchamber 2 and flows out from theduct 35; in fact compressed air acts on theleaf elements 24 which thus drive thebodies shaft 7. - In the embodiment of Figure 2, the rotation at the
outer body 4, instead of being provided in a mechanical manner by thepulley 22, is obtained by electric action via the stator winding 39, for which the rotor winding 40 constitutes the rotor of an electric motor. - Still with reference to Figure 3, the position of the
portion 43, and therefore the eccentricity of the inner rotating body with respect to the outer rotatingbody 4 can be modified and regulated via thescrews 47 by varying the distance of the axis of theshaft 32 with respect to that of theshaft 7 such that the capacity of themachine 1 can be regulated. - The embodiment of the
machine 1 schematically illus- strated in Figure 4 differs from that of Figure 1 by the fact that theshaft 7 is a through shaft and is supported, as well as by thebearings 8, also bybearings 48 housed in thecover 34, still being fixed for rotation with the outer rotating body 4 (via a key 49) such that the region of connection for the external mechanical force (motor or load) can be obtained, as is more convenient, from the fixed side of thestructure 10 or from the side of thecover 34. - The embodiment of Figure 5 differs in the fact that the external mechanical force (drive or load) is applied to a shaft 32' which is rigidly connected to the inner rotating
body 3, and projects externally from the cover side J4, being supported by bearings 31' housed in thiscover 34. The outer rotatingbody 4 no longer has theshaft 7, but is supported bybearings 8 which are disposed on a fixedspindle 60 belonging to ; thestructure 10. - The embodiment of Figures 6 and 9 differs from that of Figure 1 by the fact that the intake duct 35' and the output duct 36' are formed in the
portion 11 of thesupport structure 10 and in a radial and counterposed direction. The induction aperture 37' and delivery aperture 38' therefore open opposite the lateral surface of the outer rotatingbody 4 which has wide throughslots 60 which form an outlet in a radial sense for thevariable volume chambers 28. Thefixed part 50 facing therotating bodies outlet apertures chambers 28 in the radial direction is now obtained by means of a convenient play ( of several hundredths of a millimetre) between the outer surface of the rotatingbody 4 and the inner surface of theportion 11 of the fixed structure 10 (conveniently of the order of the radial play of the bearing 8); for the purpose of improving this seal such facing surfaces can be ribbed (both or only one) so as to form a seal of the labyrinth type. As is visible in Figure 9, in the detail indicated C,ribs 70 can be seen formed on the outer surface of the rotatingbody 4 which faces the smooth surface of the inner wall of the fixedportion 11; conveniently, the inner surfaces only of theportion 11 , or both surfaces, may be ribbed. - The embodiment of Figure 7 differs from that of Figure 6 by the fact that the radial intake duct 35' and outlet duct 36' no longer open radially out from the
support structure 10, but are bent in a direction parallel to the axis of theshaft 7 and open into anaxial inlet duct 35 and anoutlet duct 36 formed in thecover 34. - Finally, the embodiment of Figure 8 differs from that of Figure 6 by the fact that the shaft 7' is a through shaft, and is supported as well as by the
bearings 8 also by bearings 48' housed in the cover 34' which now has a structure similar to that of thesupport 10. Moreover the shaft 7' is no longer angularly fixed to the outer rotatingbody 4 but is fixed for rotation with and supports the inner rotatingbody 3. The outer rotating body 4 (eccentric with respect to the axis of the shaft 7') is supported by twobearings 80 housed in thesupport 10 and in the cover 34'. - The machines i of Figures 6,7 and 8, with radial apertures 37' and 38' allow a higher compression ratio between the fluid taken in and the exiting fluid to be obtained.
- The advantages obtained with the
machine 1 of the present invention are apparent from what has been described; in particular there is no longer any wear on the elements which define the variable volume chambers, thus permitting greater speeds and higher capacities. - Finally, it is clear that the embodiments of the present invention described can be modified and varied without
- .departing from the scope of the invention itself. For example the
leaf elements 24 which have the fundamental characteristics of being flexible can be of the type able to transmit only tractional forces or only flexion- . al forces, or combined forces; for example they may simply comprise metal strips, or else they may comprise a leaft (for example in linen-faced or rubberised fabric) reinforced by metal wires; or can be made of plastics material. Thus also,such leaf elements 24 can be joined at their ends to thebodies - The configuration with the
portion 43 for adjusting the eccentricity of thebody 3 with respect to thebody 4 can also be applied to the other embodiments described, and can also be formed in a different way, and further, the regulation of the eccentricity can be effected with an automatic control system rather than a manual one.
Claims (24)
1. A rotary machine (1) for fluids, comprising a working chamber (2) enclosed between two bodies (3,4) disposed eccentrically with respect to one another and including an intake aperture (37; 37' ) and an outlet aperture (38, 38' ) in communication with the said chamber (2), characterised by the fact that the said two bodies (3,4) are both rotatable with respect to a fixed structure (10) including the said apertures (37,38; 37' ,38' ) and by the fact that the said two bodies (3,4) are joined together by means of at least one associated connection and sealing element (24) defining at least two variable volume chambers (28) such that a rotation imparted to one (4) of the said two bodies is transmitted to the other (3).
2. A machine according to Claim 1 , characterised by the fact that it includes a plurality of said connection and sealing elements (24) each of the said elements (24) being flexible and fixed at its endsrespectively to one (3) and to the other (4) of the said bodies, and in angularly spaced positions with respect to the other elements (24).
3. A machine according to Claim 1 or Claim 2, characterised by the fact that the said elements (24) are operable to transmit traction and/or flexural forces.
4. A machine according to any preceding Claim, characterised Ly the fact that the said elements (24) comprise a leaf reinforced with metal wires.
5. A machine according to any of Claims from 1 to 3, characterised by the fact that the said elements (24) comprise metal strips.
6. A machine according to Claim 4, characterised by the fact that the said leaf (24) comprises linen faced or rubberised fabric.
7. A machine according to Claim 4, characterised by the fact that the said leaf (24) is made with a plastics material or with rubber vulcanised onto the said metal wires or on a strip.
8. A machine according to any preceding Claim, characterised by the fact that the said two bodies (3,4) have an externally circular form and are supported for rotation by the said fixed structure (10).
9. A machine according to any preceding Claim, characterised by the fact that it includes mechanical means (22) for externally imparting a rotation to one of the said two bodies (3;4).
10. A machine according to Claim 9, characterised by the fact that the said mechanical means comprise a pulley(22)fixed to a spindle (7;7',32' ) which is rigidly connected to one of the said two bodies (3;4).
11. A machine according to Claim 10, characterised by the fact that it is formed as a vacuum pump or a compressor.
12. A machine according to any of Claims from 1 to 8, characterised by the fact that the said rotation of the said two bodies (3,4) is imparted by delivering fluid under pressure between the said intake apertures (37,37') and outlet apertures (38, 38') and acting on the said connection and sealing elements (24) such as to obtain useful mechanical force at a drive shaft (7,7', 32') fixed to one of the said two bodies (3,4).
13. A machine according to any of Claims from 1 to 8, characterised by the fact that it includes electric means (39,40) for externally imparting a rotation to one of the said two bodies (4).
14. A machine according to Claim 13, characterised by the fact that the said electric means include a stator winding (39) housed in the said fixed structure (11) disposed about the said outermost body (4) and generating a driving magnetic field for the said outermost body (4).
15. A machine according to any of the preceding Claims, characterised by the fact that it includes means (43,45,47) for regulating the eccentricity between the said two bodies (3,4).
16. A machine according to Claim 15, characterised by the fact that the said regulation means are actuable with a sensing and control system.
17. A machine according to any preceding Claim, characterised by the fact that the said intake aperture (37) and outlet aperture (38) are formed on surfaces substantially perpendicular to the axes of rotation of the said two bodies (3,4).
18. A machine according to any of Claims from 1 to 16, characterised by the fact that the said variable volume chambers (28) have aperture spaces between the said two bodies (3,4) facing the said surfaces substantially perpendicular to the axes of rotation of the said two bodies (3,4).
19. A machine according to any of Claims from 1 to 16, characterised by the fact that the said intake aperture (37') and outlet aperture (38') are formed on generatrix surfaces substantially parallel to the axes of rotation of the said two bodies (3,4).
20. A machine according to Claim 19, characterised by the fact that the said intake aperture (37') and outlet aperture (38') are connected to ducts (35',36') extending in a direction perpendicular to the axes of rotation of the said two bodies (3,4).
21. A machine according to Claim 19, characterised by the fact that the said intake aperture (37') and outlet aperture (38') are connected to ducts (35,36) extending in a direction parallel to the axes of rotation of the said two bodies (3,4).
22. A machine according to any of Claims from 19 to 21, characterised by the fact that the said variable volume chambers (28) have aperture spaces (60) formed in the said outermost body (4) between terminal fixing zones for the said joining and sealing elements (24) on generatrix surfaces substantially parallel to the axes of rotation of the said two bodies (3,4).
23. A machine according to any preceding Claim, characterised by the fact that it includes sealing means (52,53,70) for substantially sealing between facing surfaces in relative rotation of the said two bodies (3,4) and/or of the said fixed structure (10,34) and/or of the said joining elements (24).
24. A machine according to Claim 23, characterised by the fact that the said means (52,53,70) include a surface ribbing such as to constitute a substantially labyrinth seal.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT6722184 | 1984-03-09 | ||
IT67221/84A IT1179597B (en) | 1984-03-09 | 1984-03-09 | ECCENTRIC ROTARY MACHINE FOR FLUIDS |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0159500A1 true EP0159500A1 (en) | 1985-10-30 |
Family
ID=11300610
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85102426A Withdrawn EP0159500A1 (en) | 1984-03-09 | 1985-03-04 | A rotary eccentric machine for fluids |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0159500A1 (en) |
JP (1) | JPS60216001A (en) |
IT (1) | IT1179597B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0290664A1 (en) * | 1987-05-15 | 1988-11-17 | Leybold Aktiengesellschaft | Two-shaft pump |
DE10222981A1 (en) * | 2002-05-23 | 2003-12-18 | Hans-Willi Stollenwerk | Rotary compressor has two cylinders of different size lying eccentrically one inside other and connected by number of vanes, with shape and size of vanes, and size of cylinders and relative position determining compression ratios |
CZ305114B6 (en) * | 2013-10-04 | 2015-05-06 | České vysoké učení technické v Praze, Fakulta strojní, Ústav výrobních strojů a zařízení | Rotary vacuum slow-run pneumatic motor |
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-
1984
- 1984-03-09 IT IT67221/84A patent/IT1179597B/en active
-
1985
- 1985-03-04 EP EP85102426A patent/EP0159500A1/en not_active Withdrawn
- 1985-03-08 JP JP60047316A patent/JPS60216001A/en active Pending
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2031125A (en) * | 1934-02-06 | 1936-02-18 | Erospha Inc | Spherical machine |
US2331878A (en) * | 1939-05-25 | 1943-10-19 | Wentworth And Hull | Vane pump |
GB582395A (en) * | 1944-10-06 | 1946-11-14 | Mieczyslaw Milewski | Improvements in rotary blowers |
CH310324A (en) * | 1952-07-26 | 1955-10-15 | Theisen Alois | Rotary lobe pump. |
US2948228A (en) * | 1956-04-17 | 1960-08-09 | Svenska Rotor Maskiner Ab | Gear arrangement functioning as pump or motor |
GB857530A (en) * | 1958-10-24 | 1960-12-29 | Gordon Maxwell Pinkard | Rotary self-priming displacement pump |
CH421715A (en) * | 1965-05-14 | 1966-09-30 | Bachmann Walter | pump |
US3544243A (en) * | 1968-09-10 | 1970-12-01 | Sterling O Stageberg | Rotary fluid pump mechanism and the like |
CH547941A (en) * | 1972-01-07 | 1974-04-11 | Monteil Jean Andre | ROTARY LISTON MACHINE FOR USE AS A POWER OR WORKING MACHINE. |
DE2232609A1 (en) * | 1972-07-03 | 1974-01-24 | Wankel Felix | SEAL FOR ROTATIONAL PISTON MACHINES |
US4118159A (en) * | 1975-11-21 | 1978-10-03 | John Allan | Rotary piston machine |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0290664A1 (en) * | 1987-05-15 | 1988-11-17 | Leybold Aktiengesellschaft | Two-shaft pump |
DE10222981A1 (en) * | 2002-05-23 | 2003-12-18 | Hans-Willi Stollenwerk | Rotary compressor has two cylinders of different size lying eccentrically one inside other and connected by number of vanes, with shape and size of vanes, and size of cylinders and relative position determining compression ratios |
CZ305114B6 (en) * | 2013-10-04 | 2015-05-06 | České vysoké učení technické v Praze, Fakulta strojní, Ústav výrobních strojů a zařízení | Rotary vacuum slow-run pneumatic motor |
Also Published As
Publication number | Publication date |
---|---|
IT1179597B (en) | 1987-09-16 |
JPS60216001A (en) | 1985-10-29 |
IT8467221A0 (en) | 1984-03-09 |
IT8467221A1 (en) | 1985-09-09 |
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