FR3061510A1 - VOLUMETRIC TURBINE - Google Patents

Abstract

The invention relates to a volumetric turbine (1) comprising an enclosure (2) equipped with a transformation compartment (4) for the pressure of a fluid flow into rotational kinetic energy, the transformation compartment (4) comprising a rotor (3) pivotally mounted via a shaft (30) and adapted to rotate under the pressure of the fluid flow. According to the invention, the rotor (3) comprises at least two pressure take-off members (5) of the fluid flow, each pressure-taking member (5) being, on the one hand, fitted to the walls (20) of the pressure conversion chamber (4), and secondly, connected to control means for channeling the fluid flow and to optimize the efficiency of the pressure transformation of the fluid flow into rotational kinetic energy.

Description

© Holder (s): KERRACHE LAHCENE, KERRACHE TOUFIK.

O Extension request (s):

© Agent (s): CABINET BREV & SUD.

FR 3 061 510 - A1 (54) VOLUMETRIC TURBINE.

(57) The invention relates to a volumetric turbine (1) comprising an enclosure (2) equipped with a transformation compartment (4) of pressure of a flow of fluid into kinetic energy of rotation, the transformation compartment (4) comprises a rotor (3) pivotally mounted via a shaft (30) and adapted to enter into rotation under the pressure of the fluid flow.

According to the invention, the rotor (3) comprises at least two pressure tapping members (5) of the fluid flow, each pressure tapping member (5) being, on the one hand, adjusted to the walls (20) of the pressure transformation compartment (4), and on the other hand, connected to control means making it possible to channel the flow of fluid and to optimize the efficiency of the transformation of pressure of the flow of fluid into kinetic energy of rotation.

Light Turbine

The present invention enters the field of the transformation of kinetic energy into mechanical energy.

The invention relates more precisely, a volumetric turbine for driving in rotation an alternator, a compressor, a pump, a generator or any other rotary mechanical receiver.

Several types of turbine are known, for example hydraulic, steam or combustion gas turbines, etc.

However, generally a turbine is made up of a kinetic energy generating enclosure which comprises a rotor mounted pivoting on an axis and configured so that the pressure of the fluid flow causes the rotor to rotate so as to transform the pressure of the flow of fluid into kinetic energy. For this purpose, the rotor comprises pressure tapping members such as, for example, fins or propellers which are adapted to drive the rotor in rotation under the effect of the flow of fluid.

The present invention provides a solution allowing, on the one hand, to improve the transformation of kinetic energy into mechanical energy by optimizing the recovery of kinetic energy from a fluid flow, and on the other hand, to reduce the wear of the mechanical parts constituting the turbine.

To this end, the present invention relates to a volumetric turbine comprising an enclosure equipped with a compartment for transforming the pressure of a flow of fluid into kinetic energy of rotation, the transformation compartment comprises a rotor mounted to pivot via a shaft and adapted to enter in rotation under the pressure of the fluid flow, characterized in that the rotor comprises at least two pressure take-off members. fluid flow, each pressure tapping member being, on the one hand, adjusted to the walls of the pressure transformation compartment, and on the other hand, connected to control means making it possible to channel the flow of fluid and to optimize the efficiency of the transformation of pressure of the fluid flow into kinetic energy of rotation.

According to a first embodiment of the invention, the pressure tapping members are mounted to rotate axially and offset radially relative to the rotor shaft, the offset position of the pressure taking members and the control means cooperating so to keep the pressure tapping members adjusted at all times and in any position at the walls of the transformation compartment.

According to a variant of the first embodiment of the invention, the means for controlling the flow of fluid are located in a transmission compartment disposed in a sealed manner within the enclosure. These characteristics make it possible to obtain a compact volumetric turbine in which the control means are isolated from any projection of fluid liable to damage them.

According to a second embodiment of the invention, the transformation compartment comprises on either side of the rotor two lobes for transferring fluid flow, each comprising an inlet opening for the fluid flow and an outlet opening for the flow of fluid. In addition, according to a feature of the second embodiment, the inlet and outlet orifices of each transfer lobe are arranged in a central symmetry with respect to the rotor shaft, thus each transfer lobe has a direction of circulation. of the flow of fluid which is opposite with respect to the direction of circulation of the flow of fluid in the other transfer lobe. Thus, the rotor is driven bilaterally in rotation amplifying its speed of rotation and therefore the transformation of the pressure of a flow of fluid into kinetic energy of rotation.

According to a third embodiment of the invention, the rotor comprises a central trunk from which extend at least two branches radially forming a bore between each branch corresponding to a housing in which is disposed a fluid flow pressure tapping member . Preferably, the rotor has four branches between each of which is arranged a pressure tapping member. This preferred configuration makes it possible to guarantee a rotary balance of the rotor, and to optimize the efficiency of the volumetric turbine and the service life of the mechanical elements constituting the volumetric turbine.

According to a first variant of the third embodiment of the invention, when a pressure tapping member enters a transfer lobe at a fluid inlet orifice, the means for controlling the flow of fluid constrain the axial rotation of the pressure tapping member so that

1 organ of making pressure rest adjusted, Firstly, at 1 bore of rotor, And on the other hand , with the walls of compartment of transformation, what generates a bedroom of push temporary which the flow of fluid can

escape only by pushing the pressure tapping member up to the fluid outlet orifice of the transfer lobe, thus optimizing the fluid flow pressure tapping.

According to a second variant of the third embodiment of the invention, each pressure tapping member is formed by a blade which has a cross section of lenticular shape allowing it to be adjusted at any time and in any position, by a part, to the walls of the processing compartment, and secondly, to the bore of the rotor.

According to a fourth embodiment, the rotor is connected to an electricity generator adapted to transform the kinetic energy of rotation of the rotor into electrical energy.

Other particularities and advantages will appear in the detailed description which follows, of a nonlimiting exemplary embodiment of the invention which is illustrated by FIGS. 1 to 7 placed in the appendix and in which:

- Figure 1 is a schematic representation of a cross section of a compartment for transforming a flow of fluid into kinetic energy of an enclosure of a volumetric turbine according to an exemplary embodiment of the invention>

- Figure 2 is a schematic representation of a longitudinal section of an enclosure of the volumetric turbine of Figure 1;

- Figure 3 is a schematic representation of a cross section of a transmission compartment of the enclosure of the volumetric turbine of Figure 1;

FIGS. 4 to 7 correspond to a kinematics of the pressure tapping members of a fluid flow and of a rotor of the volumetric turbine of FIG. 1.

The invention relates to a volumetric turbine 1 adapted to transform the pressure of a flow of fluid and kinetic energy.

In general, the fluid flow can consist of a pressurized water flow, a pressurized steam flow, a pressurized combustion gas, etc.

To this end, in the examples illustrated in Figures 1 to 7, the volumetric turbine 1 comprises an enclosure 2 generating kinetic energy. The enclosure 2 is delimited by walls 20 and has an upper face 21 and a lower face 22 which are parallel to each other and correspond to the bases of the cylinder. Here, the upper face 21 is flat, while the lower face 22 has a shoulder 23 delimiting a bottom 24 of the circular enclosure 2 and surrounded by a peripheral area 25. The enclosure 2 also has lateral faces 26 which are extend in a longitudinal direction perpendicular to the upper 21 and lower 22 faces of the enclosure 2 providing the enclosure 2 with its cylindrical shape.

As illustrated in FIGS. 1 and 4 to 7, the enclosure 2. comprises an internal space 27 delimited, above, below and laterally by an internal face 200 of the walls 20 of the enclosure 2.

In the example illustrated in FIG. 2, the internal space 27 designs, in an upper part 270, two flanges 28 which extend in a plane parallel to the upper 21 and lower 22 faces of the enclosure 2. Here, each flange 28 extends

S from the internal face -200 of the lateral faces 26 of the enclosure so as to define a circular recess 271 of radius equivalent to that of the bottom 24 of the enclosure 2.

As illustrated in FIGS. 1 to 7, in order to allow the volumetric turbine 1 to transform the pressure of a flow of fluid into kinetic energy, the enclosure 2 is equipped with a rotor 3 mounted to pivot. To this end, the rotor 3 comprises a shaft 30 which extends longitudinally at the center of the enclosure 2 in a direction perpendicular to the upper 21 and lower 22 faces of the enclosure 2. In practice, the rotor 3 is 15 integral with the shaft 30 which is pivotally mounted, on the one hand, relative to the upper face 21 of the enclosure 2 through a, upper transformation bearing 210, and on the other hand, relative to the bottom 24 of the enclosure 2 through a lower transformation bearing 240.

In order to be connected to a rotary mechanical receiver placed outside the enclosure 2, the shaft 30 passes through one of the two transformation bearings 210, 240, and extends outside the enclosure 2. In the present example, the shaft 30 crosses the two upper 210 and lower 240 transformation stages and 25 extends outside the enclosure 2, on either side, the upper 21 and lower 22 faces.

This characteristic makes it possible to mechanically connect the shaft to a rotary mechanical receiver such as an alternator, a compressor, a pcwe, a generator, etc. In the case of an alternator or a generator, this mechanical connection makes it possible to transform the kinetic energy of rotation or the moment of inertia of the shaft 30 of the rotor 3 into electrical energy.

In the example illustrated in FIG. 2, the rotor 3 comprises an upper plate 31 and a lower plate 32. The lower plate 32 has a circular shape whose dimensions are slightly smaller than those of the bottom 24 of the enclosure 2, so as to be arranged in the bottom 24 of 1 · enclosure 2.

In addition, the upper plate has a central zone 310 also of circular shape and whose dimensions are slightly smaller than those of the obviously circular 271 located in the upper part 270 of the internal space 27. For these purposes, the plate swéri ^ eure 31 has an annular zone 311 which surrounds the central zone 31. The annular zone 311 extends an upper face 312 of the central zone 310 and is connected to a lower face 313 of the central zone 310 via a shoulder 314.

Remarkably, the upper plate 31 cooperates, through, the shoulder 314 and the annular zone 311 with the flanges 28 so as to form a watertight partition 272 in the upper part 270 of the internal space 27. Preferably, sealing elements, such as seals, are arranged at the junction between the flanges 28 and the upper plate 31.

In this example, the internal space 27 of the enclosure 2 contains a transformation compartment 4 for pressure of a flow of fluid into kinetic energy for rotation of the rotor 3. Here, the transformation compartment 4 has a cylindrical shape and preferably a cylinder shape with an elliptical base.

In practice, the transformation compartment 4 is delimited, firstly, superiorly by the watertight partition 272, secondly, inferiorly by the lower plate 32 of the rotor 3 and the peripheral zone 25 of the lower face 22 of the enclosure 2, and on the other hand, laterally by the internal face 200 of the walls 20 of the lateral faces 26 of the enclosure 2.

Thus cam illustrated in FIGS. 1 and 4 to 7, the transformation compartment 4 has an elliptical cross section defined by a small axis Ap of the ellipse which passes through a central axis 40 of the ellipse and divides it into two lateral foci 41, 42 which extend on either side of the minor axis Ap of the ellipse, the lateral foci 41, 42 being symmetrical with respect to the minor axis Ap.

In this context, within the transformation compartment 4 the central axis 40 of the ellipse corresponds to the shaft 30 of the rotor

3. In addition, the transformation compartment 4 comprises on either side of the rotor 3 two lobes for transferring fluid flow. A first transfer lobe 43 is formed in the lateral focus 41 and a second transfer lobe 44 is formed in the lateral focus 42. On a first side 45 of the transformation compartment 4, the first lobe 43 is equipped with an orifice of 430 of fluid flow, while the second lobe 44 is equipped with an outlet orifice 440 of the fluid flow. Conversely, on a second side 46 of the transformation compartment

4, the first lobe 43 is equipped with an outlet orifice 431 for the fluid flow while the second lobe 44 is equipped with an inlet orifice 441 for the fluid flow.

Advantageously, the inlet ports 430, 441 and the outlet ports 431, 440 are arranged in a central symmetry with respect to the shaft 30 of the rotor 3. This feature makes it possible to create a flow of liquid in each lobe 43, 44 from the inlet orifice 430, 441 to the outlet orifice 431, 440. As a result, each lobe 43, 44 has a flow of fluid which circulates in the opposite direction with respect to the flow, of fluid from the other lobe 43, 44. This central symmetry of fluid flow circulation makes it possible to drive the shaft 30 of the rotor 3 in rotation bilaterally and therefore to improve the efficiency of transformation of the fluid flow pressure into kinetic energy of rotation.

As illustrated in FIG. 1, the dimensions of the inlet orifice 430, 441 of a fluid flow are smaller than the dimensions of the outlet orifice 431, 440 located in the same transfer lobe 43, 44. This characteristic makes it possible to generate an expansion effect of the fluid flow which enters the enclosure 2 via an inlet orifice 430, 441, thus increasing the circulation speed of the fluid flow and therefore increasing the pressure of the fluid flow. In fact, this characteristic contributes to improving the efficiency of transforming the pressure of a flow of fluid into kinetic energy of rotation.

Preferably, the fluid flow circulates at the same pressure in each lobe 43, 44 in order to promote a continuous and balanced rotation of the shaft 30 making it possible to optimize the efficiency of the volumetric turbine 1 and to reduce the mechanical wear of the parts which constitute it.

As illustrated in FIGS. 1, 2 and 4 to 7, the rotor 3 extends longitudinally within the transformation compartment 4. The rotor 3 is adapted to enter into rotation under the pressure of a flow of fluid and thus to transform the pressure of a flow of fluid in kinetic energy of rotation or in energy of the moment of inertia of the rotor 3.

To this end, the rotor 3 comprises a central trunk 33 which surrounds the shaft 30, at least two branches 34 extending radially from the central trunk 33 in the direction of the walls 20 of the enclosure 2. In the present example, the rotor 3 comprises four branches 34 which are connected together by a junction face 35 forming a concave curved surface and delimiting a bore 36 between each branch 34. Each branch 34 has a free end 340 which has a convex external surface whose curvature has the same radius as that of the lower plate 32 and of the central zone 310 of the upper plate 31.

The bore 36 defines a housing in which is disposed a pressure tapping member 5 making it possible to create a contact surface with a flow of fluid and to drive the rotor 3 in rotation.

In this example, the rotor 3 comprises four pressure tapping members 5 mounted respectively rotatably axially via a rotation axis 50 which is offset radially relative to the shaft 30 of the rotor 3. Each rotation axis 50 is rotatably mounted, from on the one hand, a lower end 500 of the axis of rotation 50 cooperates with a lower bearing 501 formed within the lower plate 32, and on the other hand, an upper end 502, opposite the lower end 501 of the axis of rotation 50, cooperates with an upper bearing 503 formed in the central zone 310 of the upper plate 31 of the rotor 3.

Preferably, each pressure tapping member 5 is formed by a blade 51 which has a cross section of lenticular shape. Thus, each blade SI has two faces 52 connected to the levels of the free ends 53 of the blade 51. Each face 52 has a convex curvature identical to the curvatures of the lower plate 32 and of the central zone 310 of the upper plate 31 of the rotor 3 Advantageously, these characteristics allow each blade 51 to be adjusted, at any time and in any position, to the bore 36 and to the internal face 200 of the walls 20 of the side faces 26 of the enclosure 2 (illustrated in the figures 1, 2 and 4 to 7).

It should be noted that in this document, the term "adjusted" means that a part of the blade 51 is located in the immediate vicinity of a surface with which it cooperates so as to generate a substantially hermetic zone. In addition, in order to amplify the substantially hermetic nature of the cooperation between a blade 51 and the surface in question, each blade 51 and / or the surface with which it cooperates may have a sealed / hermetic outer coating.

In this context, the faces 52 of each blade 51 constitute the preferential surface for taking pressure, of a flow of fluid which makes it possible to drive the shaft 30 of the rotor 3 in rotation. In practice, so that the displacement of the blades 51, under the pressure of the fluid flow, drives the rotor 3 in rotation, the volumetric turbine 1 comprises transmission means 6 connecting the axis of rotation 50 of each blade 51 to the shaft 30 of the rotor 3.

Advantageously, the design of the volumetric turbine 1 makes it possible to optimize the efficiency of the transformation of the pressure of a fluid flow. In fact, the volumetric turbine 1 comprises means 7 for controlling the fluid flow which make it possible to channel the pressure of the fluid flow and thus to increase the transformation of the pressure of the fluid flow into kinetic energy of rotation of the rotor 3.

As illustrated in FIG. 2, the control means 7 make it possible to maintain each blade 51 adjusted at any time and in any position, on the one hand, to the internal face 200 of the walls 20 of the side faces 26 of the enclosure 2, and on the other hand, to a junction face 35 defining a bore 36 of the rotor 3.

Concretely, the control means 7 are mechanically connected to each blade 51 through their axis of rotation 50. The control means 7 thus control the axial rotation of each blade 51 so that one face 52 of the blade 51 in contact with the fluid flow remains oriented substantially perpendicular to the fluid flow and adjusted both to the bore 36 of the rotor 3 and to the walls 20 of the lateral faces 26 of the enclosure 2.

Thus, as illustrated in FIG. 6, when a blade 51 enters a transfer lobe 43, 44 at an inlet orifice 430, 441, the means 7 for controlling the flow of fluid constrain the axial rotation of the blade 51 so that it remains adjusted, on the one hand, to the bore 36 of the rotor 3, and on the other hand, with the internal face 200 of the walls 20 of the lateral faces 26 of the enclosure 2.

In this situation, the cooperation between the blade 51, the control means 7, the rotor 3 and the walls 20 of the enclosure 2, generates a temporary thrust chamber 47 which is substantially hermetic, and from which the flow of fluid cannot escape only by pushing the blade 51 to the outlet orifice 431, 440 of the transfer lobe 43, 44.

Advantageously, the formation of a temporary thrust chamber 47 makes it possible to distribute the pressure of the fluid flow over the entire surface of the face 52 of the blade 51 which is in contact with the fluid flow and thus to optimize the grip surface. fluid flow pressure. This results in an improvement in the efficiency of transforming the pressure of the fluid flow into the kinetic energy of rotation of the rotor 3.

In addition, it should be noted that a thrust chamber 47 is formed simultaneously in each transfer lobe 43, 44, thereby doubling the pressure which is applied to the blades 51 of the rotor 3, and by way in fact, all the more increasing the kinetic energy of rotation of the rotor 3 (illustrated in FIG. 6).

In the example illustrated in FIGS. 1, 4 to 7, when a blade 51 passes through a transfer lobe 43, 44, the temporary formation of a substantially hermetic thrust chamber 47 is permitted by the fact that the blades 51 are adjusted to the bore 36 and to the walls 20 of the enclosure 2. This adjustment is made possible by the cooperation of several characteristics: the offset position of the blades 51 relative to the shaft 30 of the rotor 3, the control of the axial rotation blades 51 by the control means 7, the specific shape of the blades 51 allowing their free ends 53 to be positioned in the immediate vicinity of the bore 36 and the walls 20 of the enclosure 2.

Furthermore, in the example illustrated in FIGS. 1, 4 and 7, when a blade 51 is in transit between two lobed transfer 43, 44, on the one hand, a face 52 is adjusted to the walls 52 of the enclosure 2, the convex curvature of the face 52 matching the concave curvature of the walls 20 of the lateral faces 26 of the enclosure 2, on the other hand, the free ends 53 of the blade 51 are adjusted to the branches 34 between which the junction face 35 defining the bore 36 in which the blade 51 is situated. On the other hand, when a branch 34 is in transit between two lobes 43, 44 for transferring its free end 340 is adjusted to the walls 20 of the enclosure 2. Thus, the rotor 3 compartments the transformation compartment 4 into two substantially hermetic transfer lobes 43, 44.

In the example illustrated in FIGS. 1, 2 and 3, the means 7 for controlling the fluid flow and the transmission means 6 are arranged in a sealed transmission compartment 8. The transmission compartment is delimited, firstly, superiorly by the walls 20 of the upper face 21 of the enclosure 2, secondly, inferiorly by the watertight partition 272, secondly, by the walls 20 of the lateral faces 26 of the enclosure 2. Thus, the transmission means 6 and the control means 7 are protected from fluid projections and can be lubricated without impacting the operation of the rotor 3 in the transformation compartment 4.

As illustrated in FIG. 1, the walls 20 of the lateral faces 26 of the enclosure 2 have a circular section corresponding to a large radius of the elliptical section of the transformation compartment 4, the large radius extending from the central axis 40 towards, the walls 20 of the lateral faces 26 of the enclosure 2 along which extend the transfer lobes 43, 44.

In the example illustrated in FIGS. 2 and 3, in order to be connected to the transmission means 6, the upper end 502 of the axis of rotation 50 of each blade 51 extends superiorly through the upper bearing 303 so as to pass through the watertight bulkhead 272 and protrude into the transmission compartment 8, the transmission means 6 comprising a pinion of axis 60 secured to the upper end 502 of the axis of rotation 50. In practice, the transmission means 6 comprise a transmission pinion 61 which is rotatably mounted on a transmission axis 62 which is fixed and

superior 312

with

transmission

upper plate cooperates with

means

transmission 6 mechanically connects

to the control means 7 by cooperating by gear with a fixed pinion 70 integral with the upper transformation bearing 210 of the shaft 30 of the rotor 3. Thus, the

constrained.

character

gear with

through

these characteristics

rotation

This particular gear allows the means

pivoting

each blade

control

the rotation of the rotor shaft 3 (illustrated in FIGS. 4 to

)

Advantageously, these

allow

maintain each pale position, of enclosure 2, and

rotor

part, adjusted at any time at all

walls

faces

on the other hand, to that the pinion

transmission

the bore 36 and the transmission branches 34 61 can be

belt

spatial such as "higher" or "lower" to describe the

no structure

can

design allows

Claims (10)

Claims 1. Volumetric turbine (1) comprising an enclosure (2) equipped with a transformation compartment (4) for pressure of a flow of fluid into kinetic energy of rotation, the transformation compartment (4) comprises a rotor (3) pivotally mounted via a shaft (30) and adapted to enter into rotation under the pressure of the fluid flow, characterized in that the rotor (3) comprises at least two pressure tapping members (5) of the fluid flow, each member pressure tap (5) being, on the one hand, adjusted to the walls (20) of the pressure transformation compartment (4), and on the other hand, connected to control means (7) making it possible to channel the flow of fluid and to optimize the yield of the transformation of pressure of the flow of fluid into kinetic energy of rotation. 2. Volumetric turbine (1) according to claim 1, characterized in that the pressure tapping members (5) are rotatably mounted axially and offset radially relative to the shaft (30) of the rotor (3), the offset position pressure tap members and the control means (7) cooperating so as to keep the pressure tap members (5) adjusted at any time and in any position to the walls (20) of the processing compartment (4). 3. Volumetric turbine (1) according to claim 2, characterized in that, under the pressure of the fluid flow, the pressure tapping members (5) rotate the rotor (3), while the control means ( 7) of the fluid flow mechanically control the axial rotation of the pressure tapping members (5) so as to keep the pressure tapping members (5) adjusted at all times and in any position to the walls (20) of the transformation compartment (4). 4. Volumetric turbine (1) according to claim 3, characterized in that the control means (7) of the fluid flow are located in a transmission compartment (8) disposed in a sealed manner within the enclosure (2). 5. Volumetric turbine (1) according to one of claims 1 to 4, characterized in that the transformation compartment (4) comprises on either side of the rotor (3) two lobes (43, 44) for transferring fluid flow each comprising an inlet (430, 441) for the fluid flow and an outlet (431, 440) for the fluid flow. 6. Volumetric turbine (1) according to claim 5, characterized in that the inlet (430, 441) and outlet (431, 440) orifices of each transfer lobe (43, 44) are arranged in a central symmetry relative to the shaft (30) of the rotor (3), thus each transfer lobe (43, 44) has a direction of circulation of the fluid flow which is opposite with respect to the direction of circulation of the fluid flow in the another transfer lobe (43, 44). 7. Volumetric turbine (1) according to claims 1 to 6, characterized in that the rotor (3) comprises a central trunk (33) from which extend radially at least two branches (34) forming a bore (36) between each branch (34) corresponding to a housing in which is disposed a pressure tapping member (5) for fluid flow. 8. Volumetric turbine (1) according to claims 6 and 7, characterized in that when a pressure tapping member (5) enters a transfer lobe (43, 44) at an inlet orifice ( 430, 441) of fluid, the control means (7) of the fluid flow constrain the axial rotation of the pressure tapping member (5) so that the pressure tapping member (5) remains adjusted , on the one hand, to the bore (36) of the rotor (3), and on the other hand, with the walls (20) of the transformation compartment (4), which generates a temporary thrust chamber (47) from which the flow of fluid can escape only by pushing the pressure tapping member (5) to the outlet orifice (431, 440) for fluid from the transfer lobe (43, 44), thus optimizing the fluid flow pressure tap. 5 9. Volumetric turbine (1) according to claim 8, characterized in that each pressure tapping member (5) is formed by a blade (51) which has a cross section of lenticular shape allowing it to be adjusted at any time and in any position, on the one hand, 10 to the walls (20) of the transformation compartment (4), and secondly, to the bore (36) of the rotor (3). 10. Volumetric turbine (1) according to one of claims 1 to 9, characterized in that the rotor (3) is connected to an electricity generator adapted to transform the kinetic energy of rotation of the rotor (3) into electric energy. 1/5