EP0578853B1 - Rotary machine with conjugated profiles in continuous contact - Google Patents

Description

The present invention relates to a rotary machine which can be used as a compressor for suppressible media, as a pump for non-suppressible liquids, or as a motor operated by suppressible or non-suppressible media.

In particular, the invention relates to a machine whose rotary chambers are delimited by a surface of a stator and the surfaces of two or more counter-rotating rotors (or "rotating pistons") which have conjugate profiles. The rotation of the rotors is synchronized by means of gears located on the outside of the machine.

Such machines are numerous; The most important machines are described schematically below:

"Roots" compressor: two runners have two or three protrusions with straight or helical generatrices; the compression chamber is defined by the body of the stator and the protrusions of one of the rotors; therefore the compression ratio is 1 and the compression takes place because of the backflow of the medium and in an irregular manner. Such a machine, the efficiency of which is lower than that of the machines in which the compression is at least partially gradual, is only used in the case of very low compression ratios.

Compressor "Waade": it is similar to the previous compressor. Partial compression in the compression chambers can be achieved in this compressor by the design of the projections of the rotors, as a result of which the compression ratio can be adjusted by changing the width of the inlet opening; its compression ratio can reach 3.

Compressor "Bicera": the compression ratio of this compressor can be changed during operation by changing the position of the inlet openings. The application of this machine is currently tentative.

Compressor "Lysholm" or screw compressor: it is with two rotors equipped with helical projections, the profiles of which are unequal: one of the profiles is convex, the second is concave. The helical line between two successive protrusions of one of the stators and one of the rotors is divided into two chambers by contact with the protrusion of the second stator. As the rotors rotate, this contact moves axially between a first end of the stator in which the input opening is located and a second end in which the output opening is arranged; therefore the volume of the chamber gradually decreases. This compressor is used to generate compressed air with compression ratios up to 5 and flow rates up to 6 m ³ x sec ^-1 .

Compressor "Hunter": in the course of delivery of the agent from the entrance to the exit, one of the two rotors safely causes the tightness; the active member consists of the second rotor, which is equipped with projections running in contact with the walls of the outside of the stator and a stable inner member.

With appropriate changes in the dimensions of the above-mentioned machine, the same can be used as compressors, pumps or motors operated by suppressible or non-suppressable media.

• Mängel an Dichtigkeit; im Laufe ihrer Drehens sind die Rotore nicht in kontinuierlicher gegenseitiger Berührung; daraus bestehen ungewünschte Lecke, die besonders für die Verdichter für unterdrückbare Medien sehr schädlich sind, da den mechanischen und volumetrischen Wirkungsgrade verkleinern;

The above machines have the following disadvantages:

• Lack of tightness; in the course of their rotation, the rotors are not in continuous mutual contact; this results in undesired leaks, which are particularly harmful for the compressors for suppressible media, since the mechanical and volumetric efficiency are reduced;

Operating noise; especially in the case of the capsule machine (for example in the "Roots" compressor), the pulsation of the medium causes an audible noise which can only be eliminated by using an expensive silencer system.

• einen Stator, dessen erster Teil an einer Ansaugleitung und dessen zweiter Teil an einer Ausflussleitung für ein Medium angeschlossen sind; wobei die Ausflussleitung an einem Benützer oder einem Behälter angeschlossen ist;
• eine Mehrzahl an anliegenden und in Synchronisierung gegenläufenden Rotoren, die sich in einem Hohlraum des Stators befinden, wobei die Rotore das Medium von der Ansaugleitung an die Ausflussleitung liefern; jeder der Rotore befindet sich in einem in dem Hohlraum enthaltenen Hohlzylinder, wobei zwei anliegende Hohlzylinder in dem Mittelteil des Stators zur Bildung zwei Kanten und eines gemeinsamen Hohlraums miteinander durchsetzt sind, in dem sich die Rotore in einer bestimmten Winkelstellung drehen;
• Synchronisierungsmittel zur Synchronisierung der Drehbewegungen der Rotore;
• und wobei die Rotore Seitenflächen aufweisen, die aus ersten Profilen und aus zweiten Profilen bestehen, die sich im Laufe des Drehens der Rotore in kontinuierlicher Berührung bleiben lassen, um Kammern mit veränderlichem Rauminhalt in dem Stator zu begrenzen, wobei die Kammern das Medium im Laufe des Drehens der Rotore treiben, verdichten und sich ausdehnen lassen.

DE-A-2 062 007 describes a rotating machine with conjugated profiles in continuous contact, which comprises the following elements:

• a stator, the first part of which is connected to an intake line and the second part of which is connected to an outflow line for a medium; the outflow line being connected to a user or a container;
• a plurality of adjacent and synchronously opposing rotors which are located in a cavity of the stator, the rotors delivering the medium from the suction line to the outlet line; each of the rotors is located in a hollow cylinder contained in the cavity, two adjacent hollow cylinders being interspersed in the central part of the stator to form two edges and a common cavity in which the rotors rotate in a certain angular position;
• Synchronization means for synchronizing the rotary movements of the rotors;
• and wherein the rotors have side surfaces consisting of first profiles and second profiles that can remain in continuous contact as the rotors rotate to define variable volume chambers in the stator, the chambers maintaining the medium during the Rotate the rotors, compress them and allow them to expand.

These structures correspond to those set out in the introductory part of claim 1 of the present application.

The machine described in this document has no common or triple contact on the edge of the stator.

DE - A 677 150 relates to a rotary lobe pump in which the inlet and outlet slots "t" and "u" are arranged in the end walls of the housing in the region of the recesses "e" so that they can be controlled by these recesses during operation. The outlet slots "t" are connected to the line "w" through the line "v", while the outlet slots "u" are connected to the line "x" through the lines "y".

The pump works in the following way:

The rotating bodies "b" and "b ¹ " rotate in the direction indicated by the arrows in Fig.l. As they move away from the position shown, which marks the beginning of the suction stroke, the volume enclosed by the wings on the inlet side is increased and the conveying means; Air, gas or the like is sucked in through the slots "t". At the same time, the volume enclosed between the other sides of the wing pistons is reduced, so that the charge sucked in in the previous working stroke is compressed.

When the left edge of the recess "e" of the left rotating body reaches the outlet slot "u" during further rotation, the compressed load is conveyed into the discharge line. After the wing piston d has covered the outlet slots a, the compression stroke is ended. The position of the wing piston then corresponds to the position of Fig.l, only that the pistons are now directed downwards.

This pump is equipped with rotors with a simple projection; therefore the stator is not isolated from the outside of the machine.

FR-A-2 593 857 shows a pump for gases or liquids which is made up of two cylindrical cavities existing housing includes; the cavities are interconnected and each contain a helical rotor; each of the rotors includes an axis which passes through the walls of the housing and is connected to a pinion; the pinions mesh with each other and the movements of the motor transmitted to one of the pinions cause the rotors to rotate in opposite directions; the housing includes two openings on the wall opposite the pinion, one of the openings for suction and the second for outflow; in the 0 ° position the two openings are closed by the rotors; the pump is reversible by simply reversing the direction of rotation.

This pump has a single tooth and does not allow progressive pressure drops that serve to increase volumetric efficiency.

GB-2137696 describes a capsule pump with two shafts comprising: a cavity, two rotors contained in the cavity which rotate with the shafts, each of the rotors being provided with a shoulder and a notch cut; the pump also has an inlet opening and a first outlet opening, which is located at the front end of the cavity and which works together with one of the rotors through which it is controlled so that an internal compression of the medium to be pumped takes place; finally the pump is equipped with a second outlet opening which works together with a pressure relief valve.

The pump of this document has the same drawbacks as the pump described in FR-A-2 593 857.

FR - A 2 109 922 shows a compression system comprising two compressors which are used for the step-like compression of a medium.

The high pressure stage has a cavity with a compression chamber and two intersecting bores in which a main rotor and a valve rotor are contained, each of the rotors having a hub from which at least one radial tooth rises.

A cavity is provided in the area of the tooth, which enables the passage of a tooth of the other rotor in the course of a contact of the contours of the rotors, the contact serving for the tightness between the rotors.

Another compressor forms a low-pressure stage and has a cavity with at least one compression chamber, and movable compression means in the cavity to compress the medium.

In addition, the system comprises inlet openings and outlet openings in the high pressure stage, inlet openings and outlet openings in the low pressure stage, a connection between the outlet opening of the low pressure stage and the inlet opening of the high pressure stage and driving means which actuate the compression means of the high pressure stage to compress the medium according to the successive stages.

The machine described in this document has no common or triple contact on the edge of the stator.

• der erste Rotor weist ein Schließungsglied auf, das den Ausgang periodisch schließt, damit der Hochdruck erhalten und das Medium mit Hochdruck aus dem Körper ausgelassen wird;
• jeder der Vorsprünge des Rotors weist eine strahlige Verbindungskante auf, so daß der Rand des Rotors nicht schneidend ist.

EP-A-456 352 relates to an orbital machine with conjugated profiles in continuous contact, which comprises a body of a stator; there are two cylindrical bores inside the body, which are overlap; an inlet connected to both holes ensures the entry of the medium with low pressure into the body, and an outlet; which is arranged in one or more base walls of the body, serves to discharge the medium at high pressure from the body; a first and a second rotor with two projections are provided, each of the rotors being mounted in a cavity, and the rotational movements of the rotors being synchronized;

• the first rotor has a closure member which periodically closes the outlet to maintain high pressure and to discharge the medium at high pressure from the body;
• each of the projections of the rotor has a radiating connecting edge so that the edge of the rotor is not cutting.

Therefore, the independent claim emphasizes the shape of the protrusions of the rotors, the edges of which are rounded so that no sharp connecting edge is obtained.

In fact, this feature denies the possibility of having a triple touch under the edge caused by the intersection of the two cylinders, the edge of a first rotor and the edge of a second rotor.

In this, as in the rest of the current state of the art, no rotary machines are provided which have rotors in continuous contact which are suitable, a triple contact under the edge caused by the intersection of the two cylinders, the edge of a first rotor and the edge of a second rotor too receive; the shape of the rotors is also currently not evident from the current state of the art.

The combination of the preceding feature with the feature of the rotors with a plurality of teeth or projections is also currently. cannot be inferred from the present prior art.

By combining the two features, a rotary machine with high volumetric efficiency can be obtained in which a series of pressure drops between the high pressure area and the low pressure area prevents the uncontrolled leakage of the medium to the outside of the machine or from the high pressure area to the low pressure area.

The invention seeks to remedy this.

The invention, as characterized in the claims, solves the problem of creating a rotary machine with conjugated profiles in continuous contact. Using the invention, the following result can be achieved: the tip of the tooth of one rotor leaves contact with the inner wall of the stator at the same time that the tooth comes into contact with the tip of the tooth of the other rotor; an angular position is confirmed at this moment in which there is a triple contact between the teeth and the edge of the stator.

The advantages achieved by using the invention are that the uncontrolled leakage of the medium to the outside of the machine or from the high pressure area to the low pressure area is prevented by a pressure drop between the high pressure area and the low pressure area.

• einen Stator, dessen erster Teil an einer Ansaugleitung und dessen zweiter Teil an einer Ausflussleitung für ein Medium angeschlossen sind; wobei die Ausflussleitung an einem Benützer oder einem Behälter angeschlossen ist;
• eine Mehrzahl an anliegenden und in Synchronisierung gegenläufenden Rotoren, die sich in einem Hohlraum des Stators befinden, wobei die Rotore das Medium von der Ansaugleitung an die Ausflussleitung liefern; jeder der Rotore befindet sich in einem in dem Hohlraum enthaltenen Hohlzylinder, wobei zwei anliegende Hohlzylinder in dem Mittelteil des Stators zur Bildung zwei Kanten und eines gemeinsamen Hohlraums miteinander durchsetzt sind, in dem sich die Rotore in einer bestimmten Winkelstellung drehen;
• Synchronisierungsmittel zur Synchronisierung der Drehbewegungen der Rotore;
• wobei die Rotore Seitenflächen aufweisen, die aus ersten Profilen und aus zweiten Profilen bestehen, die sich im Laufe des Drehens der Rotore in kontinuierlicher Berührung bleiben lassen, um Kammern mit veränderlichem Rauminhalt in dem Stator zu begrenzen, wobei die Kammern das Medium im Laufe des Drehens der Rotore treiben, verdichten und sich ausdehnen lassen;
• und wobei die Rotore mit einer Mehrzahl an Zähnen oder Vorsprüngen ausgestattet sind.
• wobei die Spitze des Zahnes eines Rotors die Berührung mit der Innenwand des Stators in dem selben Augenblick verläßt, in welchem der Zahn in Berührung mit der Spitze des Zahnes des anderes Rotors kommt; wobei sich eine Winkelstellung in diesem Augenblick bewahrheitet, bei welcher eine dreifache Berührung zwischen den Zähnen und der Kante des Stators stattfindet.

The rotary machine according to the invention comprises the following devices:

• a stator, the first part of which is connected to an intake line and the second part of which is connected to an outflow line for a medium; the outflow line being connected to a user or a container;
• a plurality of adjacent and synchronously opposing rotors which are located in a cavity of the stator, the rotors delivering the medium from the suction line to the outlet line; each of the rotors is located in a hollow cylinder contained in the cavity, two adjacent hollow cylinders being interspersed in the central part of the stator to form two edges and a common cavity in which the rotors rotate in a certain angular position;
• Synchronization means for synchronizing the rotary movements of the rotors;
• the rotors having side surfaces consisting of first profiles and second profiles that can be kept in continuous contact as the rotors rotate to define variable volume chambers in the stator, the chambers rotating the medium the rotor drives, compresses and can be expanded;
• and the rotors are provided with a plurality of teeth or protrusions.
• the tip of the tooth of one rotor leaving contact with the inner wall of the stator at the same time that the tooth comes into contact with the tip of the tooth of the other rotor; an angular position is confirmed at this moment in which there is a triple contact between the teeth and the edge of the stator.

A secondary line for connecting one of the chambers, in which an irregular pressure value for the operation of the machine occurs, is preferably to one of the lines mentioned.

Advantageously, the secondary line connects an inlet opening with a chamber with variable volume, the secondary line with a throttle valve for determining the flow of the medium supplied by the chamber to one of the lines mentioned, in order to limit the pressure of the medium at the start of the working cycle.

In addition, each of the connecting edges of a rotor begins rotating in a common cavity of adjacent hollow cylinders at the same time that it comes into contact with the side surface of the adjacent rotor.

• Fig.1 einen Vertikalschnitt einer erfindungsgemäßen Maschine;
• Fig.2 einen Schnitt der Maschine mit der Fläche A-A der Fig.1;
• Fig.3 einen Schnitt der Maschine mit der Fläche B-B der Fig. 2;
• Fig.4 eine schematische Darstellung des Stators und zwei Rotore in einer ersten Winkelstellung;
• Fig.5 eine schematische Darstellung des Stators und der beiden Rotore in einer zweiten Winkelstellung;
• Fig.6 eine schematische Darstellung des Stators und der beiden Rotore in einer dritten Winkelstellung;
• Fig.7 eine schematische Darstellung des Stators und der beiden Rotore in einer vierten Winkelstellung;
• Fig.8 eine schematische Darstellung des Stators und der beiden Rotore in einer fünften Winkelstellung;
• Fig.9 eine schematische Darstellung des Stators und der beiden Rotore in einer dritten Winkelstellung;
• Fig.10 ein Dichtigkeitsglied eines Stators in vergrössertem Maßstab.

Further advantages, details and features essential to the invention result from the following description of a preferred embodiment of the rotary machine according to the invention, with reference to the attached drawings. The individual shows:

• 1 shows a vertical section of a machine according to the invention;
• 2 shows a section of the machine with the area AA of FIG. 1;
• 3 shows a section of the machine with the surface BB of FIG. 2;
• 4 shows a schematic representation of the stator and two rotors in a first angular position;
• 5 shows a schematic representation of the stator and the two rotors in a second angular position;
• 6 shows a schematic representation of the stator and the two rotors in a third angular position;
• 7 shows a schematic illustration of the stator and the two rotors in a fourth angular position;
• 8 shows a schematic illustration of the stator and the two rotors in a fifth angular position;
• 9 shows a schematic illustration of the stator and the two rotors in a third angular position;
• 10 shows a sealing member of a stator on an enlarged scale.

The figures represent a rotating machine with conjugated profiles in continuous contact as well as structural and functional parts of the same machine.

According to FIG. 1, a rotary machine 1 essentially consists of a stator 2 located in a central plate 3 and two side plates 4 and 5, which include the central plate 3. In the plates 4 and 5 bearings for two shafts and other known mechanical devices are provided, which are not designated by reference numerals. A drive 8 ensures the rotation of the shaft 6, to which it is attached.

Two toothed wheels 9 and 10 engage with each other to synchronize the rotary movements of the shafts 6 and 7.

A first rotor 11 rotates with the shaft 6 and a second rotor 12, which is adjacent to the first rotor 11, rotates with the shaft 7, the rotors 11 and 12 being located in a cavity 13 of the central plate 3; the stator 2 is formed from the middle plate 3 and from the side plates 4 and 5.

2 shows the cavity 13 in which the rotors 11 and 12 rotate in opposite directions; the cavity 13 consists of two hollow cylinders 14 and 15, the axes of symmetry of which are parallel to the axis of symmetry of the stator 2. In general, the rotor 11 rotates in the hollow cylinder 14 and the rotor 12 rotates in the hollow cylinder 15. In the middle part of the stator 2, the hollow cylinders 14 and 15 are interspersed with one another such that the rotor 11 in the hollow cylinder 15 and the rotor 12 rotate in the hollow cylinder 14 in the course of rotation and at certain angular positions. The rotors 11 and 12 are in opposite directions; their directions of rotation are indicated by the arrows F ₁ and F ₂ .

An intake line 16 connects the cavity 13 to an inlet opening equipped with a filter (not shown), which ensures that a medium enters the machine. An exit opening 17 made in the plate 4 is located in a predetermined position of the hollow cylinder 14. Such an exit opening, not shown, is made in the plate 5. From this and from the outlet opening 17 begins an outflow line 18 which is connected to a user or to a container for the medium used.

To simplify matters, the exit opening (not shown) is not designated in the wake.

The hollow cylinder 15 is connected to the suction line 16 by a secondary line 19, the first end 20 of which opens into the hollow cylinder 15 and the second end 21 into the suction line 16. A throttle valve 22 is provided in the secondary line 19 for controlling the flow of the medium through the same secondary line 19.

In the plate 4, a groove 23 is provided for connecting the suction line 16 to a part of the cavity 13; the purpose of this connection is explained below.

The groove 23 is better shown in Figure 6; In this figure, the same reference numerals each mean the same details that are designated in the previous figures.

The rotor 12 has first and second sides 24 and 25 which slide on walls 26 and 27 with very little friction; the walls 26 and 27 each belong to the plates 4 and 5 and delimit the cavity 13 by two surfaces which are perpendicular to the axis of symmetry of the same cavity 13. This prevents undesired leakage of the medium during the operation of the machine.

The rotors 11 and 12 have the same profiles, the design of which is selected such that the same rotors are in continuous contact during their rotation in order to limit chambers with variable volume, the chambers driving the medium during the rotation of the rotors, compressing them and let it expand.

Such a profile is formed from an involute connected to a trochoid.

The working methods of these profiles are shown in the figures from 4 to 8.

The profiles of the rotors 11 and 12 each comprise two identical involute contours E ₁ , E ₂ , E ₃ and E ₄ and two identical trochoid contours T ₁ , T ₂ , T ₃ and M ₄ .

The involute contour E ₁ is located in the rotor 11 between an edge C ₁ and a connection point R ₁ , the trochoid contour T ₁ extends between the connection point R ₁ and an edge C ₂ ; the involute contour E ₂ is arranged between the edge C ₂ and a connection point R ₂ , and the trochoid contour T ₂ is provided between the connection point R ₂ and the edge C ₁ .

The involute contour E ₃ is located in the rotor 12 between an edge C ₃ and a connection point R ₃ , the trochoid contour T ₃ extends between the connection point R ₃ and an edge C ₃ ; the involute contour E ₄ is arranged between the edge C ₄ and a connection point R ₄ , and the trochoid contour T ₄ is provided between the connection point R ₄ and the edge C ₄ .

Figures 4 to 8 explain the operation of the machine 1 in successive angular positions of the rotors 11 and 12 in the course of their synchronized rotary movements.

In the angular position shown in Figure 4, the line 16 is connected to the chamber 28 with variable volume; the chamber 28 is located. between the contours E ₁ and T _{1 of} the rotor 11, the contours E ₃ e T _{3 of} the rotor 12 and the side wall 29 of the stator 2. The edges C ₁ and C _{4 of} the rotors 11 and 12 are in contact with the side wall 29 ; the medium contained in the chamber 30 has been compressed since the volume of the chamber 30 is smaller than the volume of the chamber 28, the chamber 30 being between the contours E ₂ and T _{2 of} the rotor 11 and the contours E ₄ e T ₄ of the rotor 12 and the side wall 29 of the stator 2. The rotor 11 closes the outlet opening 17 connected to the outflow line 18 and the groove 23 connects the line 16 to a chamber 31 with variable volume, which by touching the edge C ₂ with the contour T ₄ and the contour E ₂ with the contour E. _{4 is} limited.

Because of this connection, the pressure of the medium in the chamber 31 remains constant in the suction value in order to prevent the resistances caused by excessive expansion, since the chamber 31 tends in the directions F ₁ and F ₂ during the rotation of the rotors 11 and 12. to stretch.

The angular position shown in FIG. 5 was achieved by synchronized rotation of the rotors 11 and 12 in the directions F ₁ and F ₂ . by this rotation, the medium previously contained in the chamber 28 is in two chambers 28a and 28b, the chamber 28a and 28b each by the contours E ₁ and T _{1 of} the rotor 11, the contours E ₃ and T _{2 of} the rotor 12 and will limit the wall 29 of the stator 2. The pressure of the medium contained in the chambers 28a and 28b is equal to the pressure of the medium which was previously found in the chamber 28, since the total volume of the chambers 28a and 28b is equal to the volume of the chamber 28.

The pressure of the medium in the chamber 30a is greater than the pressure of the medium previously contained in the chamber 30, since the volume of the chamber 30a is less than the volume of the chamber 30, the chamber 30a being defined by the contours T ₂ and E ₄ in mutual contact, the edge C ₁ and C ₂ and the wall 29 with which the edge C ₁ and C _{2 are} in contact is limited. In addition, the chamber 30a is delimited by the contours E ₂ e T ₂ and E ₄ . In this operating state, the pressure of the medium contained in the chamber 30 reaches its maximum value because the rotor 11 has not yet opened the outlet opening 17.

The angular position shown in FIG. 6 was achieved by a further synchronized rotation of the rotors 11 and 12 in the directions F ₁ and F ₂ . Because of this rotation, the opening is opened by the rotor 11 so that medium then flows from the chamber 30b to the outflow line 18. In this operating state, the total volume of the chambers 28a and 28b has not changed, so that the pressure value of the medium has remained constant.

The edges C ₁ and C ₃ are in mutual contact to prevent undesired leakage from the outlet opening 17 in order to achieve the maximum volumetric efficiency, the contact in the connecting edge of the hollow cylinder 14 with the hollow cylinder 15 in which the chambers 28 and 30 are variable Part of the stator containing the volume. The chamber 30b is delimited by the contours E ₂ and T ₂ , the edge C _{1 of} the rotor 11 and the edge C _{2 of} the rotor 12 in the course of the mutual contact of the contours E ₂ , T ₂ and E ₄ , T ₄ .

The angular position shown in FIG. 7 was achieved by a further synchronized rotation of the rotors 11 and 12 in the directions F ₁ and F ₂ . because of this rotation, the chamber 30c is connected to the suction pipe 16; in addition, chambers 28a and 28b are assembled to form a single chamber 28c in which the pressure value of the medium is equal to the pressure value of the medium in the separate chambers 28a and 28b. The outlet opening 17 is connected to the chamber 30c, which is limited by the contact of the edge C ₃ with the contours E ₂ and T ₂ and the contours E ₂ , T ₂ and E ₄ , T ₄ . The medium thus opens into the outflow line 18 with a pressure value that is hardly greater than the pressure value of the user or the container. The volume of the chamber 30c is smaller than the volume 30b of FIG. 6, but the pressure of the medium does not increase because the rotor 11 has opened the outlet opening.

The angular position shown in FIG. 8 was achieved by a further synchronized rotation of the rotors 11 and 12 in the directions F ₁ and F ₂ . in this operating state, the compression of the medium contained in the chamber 28c begins. To determine the pressure value of the medium at the beginning of its compression, the throttle valve 22 is actuated, which controls the flow of the medium supplied from the chamber 28c to the suction line 16 until the edge C ₄ the end 20 of the line 19 as the rotor 11 rotates in the direction of F ₁ . The reduction in the volume of the chamber 30d continues until the rotor 11 exits the outlet closes again.

By continuing to rotate the rotors 11 and 12 in the directions F1 and F2, the operating state shown in FIG. 4 is reached again, but in this case the profiles are reversed.

5 For an angular value of the rotation of the rotor 11 related to the rotation of the rotor 12, the edge C _{1 is} in contact with the connection point R3. Such contacts occur between the edge C3 and the connection point R1 and so on in order to achieve an operation of the machine with low noise and wear.

A circulation machine was thus created by means of which the mutual separation of chambers with variable volume is achieved in order to prevent leakage of the medium to parts with low pressure in any angular position of the rotors.

Appropriate dimensions and positions of the groove 23 can be used to achieve controlled leakage paths in order to prevent undesired pressure differences in the various applications of the machine with non-suppressable liquids.

At this point it should be expressly stated once again that the foregoing description is only of such an exemplary character. The arrangement shown in FIG. 9 also falls. In this arrangement, each of the edges C ₁ , C ₂ , C ₃ , C ₄ , C ₅ , C ₆ is with two contours E ₁ , T ₁ , E ₂ , T ₂ , E ₃ , T ₃ , E ₄ , T ₄ , E ₅ , T ₅ , E ₆ , T ₆ connected by a circular contour K ₁ , K ₂ , K ₃ , K ₄ , K ₅ and K ₆ , which on the side wall 29 of one of the hollow cylinders 14 or 15 to maintain a primary Tightness slides, each of the circular contours having two separate connecting edges W ₁ , W ₂ , W ₃ , W ₄ , W ₅ , W ₆ , C ₁ , C ₂ , C ₃ , C ₄ , C ₅ , C ₆ .

In addition, each of the rotors 11, 12 has three involute contours E ₁ , E ₂ , E ₃ and three trochoid contours T ₁ , T ₂ , T ₃ .

In terms of the rest of the details, the two rotors are the same as the previous rotors.

Claims (8)

1. Rotatory machine with conjugated profiles in continuous contact, comprising the following elements:

   one stator (2), the first side of of said stator (2) being connected to a suction duct (16), and the second side of said stator (2) being connected to a delivery duct (18) for a fluid; said delivery duct (18) being connected to an utiliser or a tank;

   a plurality of adjacent rotors (11,12) counter-rotating in synchronization, which are housed in a hollow (13) of the stator (2), said rotors (11,12) sending the fluid from the suction duct (16) into the delivery duct (18); each of said rotors (11,12) being located in a hollow cylinder (14,15) housed in said hollow (13), two adjacent hollow cylinders (14,15) being introduced into the central part of the stator (2) to generate two edges and a common cavity, in which said rotors (11,12) rotate in a pre-established angular position;

   synchronization means (6,7) for the synchronization of the rotations of said rotors (11,12);

   said rotors (11,12) presenting lateral surfaces consisting of first profiles (E₁,E₂,E₃,E₄,E₅,E₆) and second profiles (T₁,T₂,T₃,T₄,T₅,T₆), which remain in continuous contact during rotation of said rotors (11,12) to delimit chambers (28,28a,28b,28c,30,30a,30b,30c,30d) with variable volume in said stator (2), said chambers (28,28a,28b,28c,30, 30a,30b,30c,30d) displacing, pressing and making expand the fluid during rotation of said rotors (11,12); and

   said rotors (11,12) being fitted with a plurality of teeth or lobes;

      characterised by the fact that the point of the tooth of one rotor (11) leaves the contact with the internal wall of the stator (2) in the same instant in which the tooth is brought into contact with the point of the tooth of the other rotor (12); an angular position taking place in this instant, in said angular position a triple contact among said teeth and the edge (I₁) of the stator (2) occurring .
2. Rotatory machine as in claim 1, characterised by the fact that each of said first profiles (E₁,E₂,E₃,E₄,E₅,E₆) is radiused with one of said second profiles (T₁,T₂,T₃,T₄,T₅,T₆) by means of a radiusing part shaped as an arc of a circle (K₁,K₂,K₃,K₄,K₅,K₆), each of the parts shaped as an arc of a circle (K₁, K₂,K_3,K_4,K_5,K₆) presenting two radiusing edges (W₁,W₂,W₃,W₄,W₅,W₆, C₁,C₂,C_3,C_4,C_5,C₆).
3. Rotatory machine as in claim 2, characterised by the fact that each of said first profiles (E₁,E₂,E₃,E₄,E₅,E₆) is radiused with one of said second profiles (T₁,T₂,T₃,T₄,T₅,T₆) by means of a radiusing part shaped as an arc of a circle (K₁,K₂,K₃,K₄,K₅,K₆), on which the internal wall (29) of a cylindrical hollow (14,15) slides.
4. Rotatory machine as in claim 1, characterised by the fact that each of said first profiles (E₁,E₂,E₃,E₄E₅,E₆) comprises identical contours shaped as an involute, and each of said second profiles (T₁,T₂,T₃,T₄,T_5,T₆) also comprises identical contours shaped as a trochoid; each of the contours shaped as an involute being radiused with the relative contour shaped as a trochoid by means of a radiusing point (R₁,R₂,R₃,R₄,R₅,R₆).
5. Rotatory machine as in claim 1, characterised by the fact that each of said first and said second profiles (E₁,E₂,E₃,E₄,E₅,E₆,T₁,T₂,T₃,T₄,T₅,T₆) presents radiusing edges (W₁,W₂,W₃,W₄,W₅,W₆), which, during rotation of said rotors (11,12), are brought into contact with the lateral wall (29) of the stator (2) or with the profile of an adjacent rotor (11,12).
6. Rotatory machine as in claim 1, characterised by the fact that a by pass canalisation (19) connects the suction duct (16) to a chamber (28,30,31) with variable volume; the by pass canalisation (19) being fitted with a throttle valve (22) to regulate the flow rate of the fluid sent from chamber (28, 30,31) into the suction duct (16) or the delivery duct (18) in order to define the pressure of the fluid at the begin of the working phase.
7. Rotatory machine as in claim 1, characterised by the fact that the by pass canalisation (19) connects one of the chambers (31), in which an irregular value of pressure for the working of the machine occurs, to one of said suction or delivery ducts (16,18).
8. Rotatory machine as in previous claims, characterised by the fact that the machine (1) can be used as a compressor for compressible fluids, as a pump for incompressible liquids, or as a motor moved by compressible or incompressible fluids.

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