BE1024886B1 - Dynamo pump - Google Patents

Abstract

The present invention relates to a device incorporating a pump and an electric generator in a particularly small volume. A rotation of a pinion shaft (23) causes a rotation of a pinion (11) which causes a rotation of a ring (12). The rotations of the pinion (11) and the ring gear (12) create a pumping of fluid from a fluidic inlet to a fluidic outlet of the device. Magnets (3) are attached to the ring gear (12) to form a rotor (13). The rotation of this rotor (13) relative to a stator (14) causes a production of electrical energy.

Description

(30) Priority data:

(73) Holder (s):

SAFRAN AERO BOOSTERS S.A.

4041, HERSTAL (MILMORT)

Belgium (72) Inventor (s):

CHENOUX Mathieu 6700 ARLON Belgium

MARICHAL Michaël 1160 AUDERGHEM Belgium (54) Dynamo-pump (57) The present invention relates to a device integrating a pump and an electric generator in a particularly reduced volume. A rotation of a pinion shaft (23) causes a rotation of a pinion (11) which causes a rotation of a crown (12). The rotations of the pinion (11) and the crown ____i (12) create a pumping of fluid from a fluid jpV inlet to a fluid outlet of the device. Des (I.

Y! ^f magnets (3) are fixed on the crown (12) so as to _ form a rotor (13). The rotation of this rotor (13) relative to a stator (14) results in the production of electrical energy.

AT". ί

BELGIAN INVENTION PATENT

FPS Economy, SMEs, Middle Classes & Energy

Publication number: 1024886 Deposit number: BE2017 / 5005

Intellectual Property Office International Classification: F04C 2/10 F04C 15/00 Date of issue: 08/10/2018

The Minister of the Economy,

Having regard to the Paris Convention of March 20, 1883 for the Protection of Industrial Property;

Considering the law of March 28, 1984 on patents for invention, article 22, for patent applications introduced before September 22, 2014;

Given Title 1 “Patents for invention” of Book XI of the Code of Economic Law, article XI.24, for patent applications introduced from September 22, 2014;

Having regard to the Royal Decree of 2 December 1986 relating to the request, the issue and the maintenance in force of invention patents, article 28;

Given the patent application received by the Intellectual Property Office on 09/01/2017.

Whereas for patent applications falling within the scope of Title 1, Book XI of the Code of Economic Law (hereinafter CDE), in accordance with article XI. 19, §4, paragraph 2, of the CDE, if the patent application has been the subject of a search report mentioning a lack of unity of invention within the meaning of the §ler of article XI.19 cited above and in the event that the applicant does not limit or file a divisional application in accordance with the results of the search report, the granted patent will be limited to the claims for which the search report has been drawn up.

Stopped :

First article. - It is issued to

SAFRAN AERO BOOSTERS S.A., Route de Liers 121, 4041 HERSTAL (MILMORT) Belgium;

represented by

GEVERS PATENTS, Holidaystraat 5, 1831, DIEGEM;

a Belgian invention patent with a duration of 20 years, subject to the payment of the annual fees referred to in article XI.48, §1 of the Code of Economic Law, for: Dynamo-pompe.

INVENTOR (S):

CHENOUX Mathieu, Rue de la Promenade 4, 6700, ARLON;

MARICHAL Michaël, Rue Jacques Bassem 10 box 2, 1160, AUDERGHEM;

PRIORITY (S):

DIVISION:

divided from the basic application: filing date of the basic application:

Article 2. - This patent is granted without prior examination of the patentability of the invention, without guarantee of the merit of the invention or of the accuracy of the description thereof and at the risk and peril of the applicant (s) ( s).

Brussels, 08/10/2018, By special delegation:

BE2017 / 5005

Dynamo-pump

Technical field [0001] In a first aspect, the present invention relates to an electric generator. According to a second aspect, the present invention relates to a method of converting mechanical energy into hydraulic energy and electrical energy.

PRIOR ART It may be advantageous to place auxiliary electrical devices, such as sensors, in a lubrication group of a turbomachine, helping the operation of said lubrication group. In known systems, these auxiliary electrical devices are supplied by a source external to the lubrication group. This leads to problems integrating the electrical connections with the outside of the lubrication group. In fact, since the power supply specifications for each model of lubrication group may be different, depending on the integrated auxiliary electrical devices, the electrical supplies may have to be modified according to the model of lubrication group. In addition, in particular in the case of a lubrication group for an aircraft turbomachine, the wiring may have to join the fuselage of the aircraft, which makes it complicated and potentially subject to ruptures, [0003] There is therefore a problem of supplying electricity to auxiliary electrical devices of a lubrication group from an internal source to the lubrication group.

One possible solution is to install an electric generator in the lubrication group. This would however result in a heavy, expensive and bulky system.

Document US8143754 B2 discloses a generator system for a vehicle comprising a hydraulic motor and an electric generator. Hydraulic motor converts power

BE2017 / 5005 hydraulic into mechanical energy of rotation, and the generator converts mechanical energy of rotation into electrical energy. This system could be integrated into a lubrication group. However, this would also require incorporating a pump upstream of the hydraulic motor to supply it, and this pump would have to be supplied with electrical energy. This known system therefore does not solve the problem of supplying electricity from a lubrication group. In addition, the need to install a pump, a hydraulic motor and an electric generator in the lubrication group makes the assembly particularly bulky, expensive and heavy.

Summary of the invention In a first aspect, one of the aims of the invention is to provide an inexpensive electric generator which can be easily integrated into a lubrication group, in particular into a lubrication group of a turbomachine. aircraft, and whose presence has little influence on the volume and weight of the lubrication group.

For this purpose, the invention proposes an electric generator comprising:

"A pinion, * a drive means mechanically coupled to the pinion so as to drive the pinion in rotation, and designed to be mechanically coupled to a mechanical drive device, * a crown arranged around the pinion to be able to be driven in rotation by the pinion so as to form an internal gear pump with the pinion, ® a fluid inlet allowing the internal gear pump to be supplied with fluid from outside the electric generator, ® a fluid outlet allowing the fluid to flow out of the internal gear pump to the outside of the electric generator,

BE2017 / 5005 ® magnets mechanically coupled to the crown so as to rotate with it to form a rotor, ® a stator arranged around the rotor and comprising coils so that a rotation of the rotor generates electrical energy in said coils , and "an electrical connection means electrically connected to the coils and arranged to transfer electrical energy generated in said coils to an auxiliary electrical device, so that the electrical generator is capable of compressing a fluid and generating electrical energy when The pinion is rotated by the drive means.

[ÔOOS] The electric generator according to the invention has a pump function in addition to its electric power generation function. It therefore forms, in a single unit, a generator and a pump. When integrated into a lubrication group, it can replace a pump. Since according to the arrangement of the electric generator, the rotor and the stator are around the pinion and the crown, the electric generator takes little or no more space than the pump which it replaces. This makes it particularly easy to integrate into the lubrication group and this allows its presence not to appreciably increase the volume of the lubrication group. [0009] Furthermore, the electric generator according to the invention is designed to be driven, via the drive means, by a mechanical drive device which can be a drive shaft of a turbomachine comprising the lubrication group. In this way, a movement, for example a rotation of this mechanical drive device causes a rotation of the pinion, which causes a rotation of the crown and thus pumps the fluid. At the same time, the rotor magnets rotate with the crown and this rotation produces electrical energy in the stator coils. Therefore, mechanical energy

BE2017 / 5005 from the rotation of the engine shaft of the turbomachine is converted into hydraulic energy and electrical energy. The generator according to the invention therefore allows the supply of auxiliary electrical devices, such as sensors, present in the lubrication group, without having to call on electrical sources external to the lubrication group. This eliminates the need for a power supply to the lubrication unit.

The presence of the electric generator does not cause a large increase in weight of the lubrication group since it is hardly heavier than the pump it replaces. This is a significant advantage for an aircraft turbomachine component.

Compared to a system comprising a traditional pump and a traditional electric generator, the electric generator according to the invention allows a great simplification of design since a single element (the electric generator according to the invention) replaces two elements (the traditional pump and traditional electric generator). This also simplifies maintenance since a single removal is sufficient for the electric generator according to the invention, instead of a removal for a traditional pump and a removal for a traditional electric generator. In addition, the number of parts is less and their arrangement allows a reduction in volume and a reduction in mass compared to a system comprising a traditional pump and a traditional electric generator. This allows the electric generator according to the invention to be cheaper than that comprising a traditional pump and a traditional electric generator, [8012] The electric generator takes less power from the mechanical drive device than a system comprising a traditional pump and a traditional electric generator because the number of drive elements is reduced.

BE2017 / 5005 The electric generator makes it possible to reduce the consumption of oil compared to a system comprising a traditional pump and a traditional electric generator because it makes it possible to reduce the number of parts requiring lubrication.

The electric generator according to the invention can be called pump generator, pump generator or dynamopump device.

In one embodiment, the electric generator according to the invention makes it possible to provide relatively low powers, of maximum 100 W, which are suitable for supplying auxiliary electric devices such as sensors, [0010] The electric generator according to the invention is driven mechanically via the drive means and not hydraulically. In fact, a hydraulic drive of the electric generator would cause hydraulic energy to be lost while the electric generator according to the invention makes it possible to generate hydraulic energy. [0017] Preferably, the fluid pumped by the internal gear pump is liquid. Preferably, the fluid pumped by the internal gear pump is a lubricating liquid, for example oil.

Preferably, the auxiliary electrical device is not part of the electric generator.

In the context of this document, a mechanical coupling can be for example a direct fixation (that is to say without an intermediate element) or an indirect fixation (that is to say via at least one intermediate element ), Mechanical coupling can be permanent or temporary. A mechanical coupling can be fixed or allow the mechanically coupled elements to move relative to each other, In the context of this document, a drive can be, for example, a direct drive (i.e. - say without element

BE2017 / 5005 intermediate) or indirect drive (i.e. via at least one intermediate element).

In the context of this document, an auxiliary electrical device is an electrical device which requires a supply of electricity. Preferably the auxiliary electrical device requires a relatively low electrical power, for example from 0.1 to 100 W. it can be part of a lubrication group. It is preferably included in a lubrication group comprising the electric generator. The auxiliary electrical device may be, for example, an oil level sensor, an oil deterioration degree sensor or a particle in oil detector. The auxiliary electrical device can be outside the lubrication group comprising the electrical generator. In the case where the lubrication group comprising the electrical generator is integrated in an aircraft turbomachine, the auxiliary electrical device can be part of a turbomachine injection system, of a communication system with a cabin of the aircraft or an FADEC system of the aircraft.

According to a possible embodiment of the invention, the drive means is fixed to the pinion, According to a possible embodiment of the invention, the drive means comprises a pinion shaft.

The pinion shaft is preferably in the axis of rotation of the pinion.

According to a possible embodiment of the invention, the pinion shaft comprises meshing teeth arranged to be meshed by the mechanical drive device [0026] According to a possible embodiment of the invention, the electrical connection means comprises an electrical wire or a plurality of electrical wires.

BE2017 / 5005 According to one possible embodiment of the invention, the electric generator comprises a fluid connection between a pumping space located between the pinion and the crown and the rotor, so that the rotor is immersed in a fluid circulating in the pumping space.

This provides lubrication of the rotor if the pumped fluid is a lubrication liquid.

[8029] According to a possible embodiment of the invention, the electric generator comprises a sealing jacket located between the rotor and the stator.

The sealing jacket is a fluid blocking means. The sealing jacket is used to prevent the fluid circulating in the pump, and in particular in the pumping space, from reaching the stator. This fluid could damage your stator coils. The sealing jacket is preferably an essentially cylindrical element Impermeable to the pumped fluid. It can be called a stator shirt. The sealing jacket is preferably made of an electrically insulating material so that it does not disturb the magnetic signal between the rotor and the stator, [8031] According to a possible embodiment of the invention, the sealing jacket is arranged to serve as a bearing for the rotor.

The distance between the sealing jacket and the rotor is preferably chosen so that a film of lubrication liquid is formed between the two, so as to allow a smooth and regular rotation of the rotor while the stator remains stationary. This bearing can be considered as a hydraulic or hydrodynamic bearing.

[0833] According to a possible embodiment of the invention, the electric generator comprises an interruption means making it possible to interrupt the transfer of electric energy while maintaining the rotations of the pinion and the crown.

BE2017 / 5005 [0034] The interrupting means can interrupt the generation of electrical energy, but it can interrupt the transfer of electrical energy to the auxiliary electrical device. The interrupting means is preferably located on the electrical connection means. This can for example be a

Switch located on the electrical connection means, According to a possible embodiment of the invention, the electric generator comprises a housing, an inner surface of which defines a cavity in which the pinion, the crown, the rotor and the 1st are located. stator, the stator being mechanically coupled to said interior surface and the housing being pierced with a first opening forming part of the fluid inlet, a second opening forming part of the fluid outlet and a third opening for the means d 'drive, The housing allows good protection of the electric generator. The stator coils preferably feel mechanically coupled to the housing in order to save space and reduce the number of parts of the electric generator. Preferably, the housing includes a fourth opening for the electrical connection means.

Seion a possible embodiment of the invention, your fluid inlet and outlet have a direction having a component parallel to the axis of rotation of the crown.

Indeed, because of the coils, it is preferable that these input and output are not radial, but have a direction having an axial component had an axial direction. Preferably, the fluid inlet and outlet are essentially parallel to the rate of rotation of the crown.

The invention further provides, according to a possible embodiment, a lubrication group comprising an electrical generator according to an embodiment of the invention and an auxiliary electrical device electrically connected to the electrical generator via the electrical connection means of the electric generator.

BE2017 / 5005 This lubrication group can for example be used in an aircraft turbomachine. The auxiliary electrical device can for example be a sensor such as an oil level sensor in the lubrication group or a particle detector in the lubrication liquid. This allows an electrical device included in the lubrication group to be directly supplied by an electrical source from the lubrication group. This avoids electrical wiring entering or leaving the lubrication group. This also allows the manufacturer of the lubrication group to directly adapt the specifications of the electric generator to those of the auxiliary air-conditioning device (s).

[ÔG41] In the context of the present document, a “lubrication group is a set of equipment allowing lubrication, [0042] The invention also proposes, according to a possible embodiment, a turbomachine, in particular an aircraft, including:

® an electric generator according to one embodiment of the invention, "an auxiliary electric device electrically connected by means of electrical connection of said electric generator, and"> a mechanical drive device comprising a motor shaft and mechanically coupled by means of drive of said electric generator, so as to rotate the pinion of said electric generator via said drive means.

The electrical generator is preferably part of a lubrication group for the turbomachine. In addition, the auxiliary electrical device can be part of) the same lubrication group.

According to one embodiment of the invention, the mechanical drive device further comprises a reduction box and / or gears mechanically coupling the motor shaft to the drive means.

BE2017 / 5005 [0045] According to a second aspect, the invention proposes a method of converting mechanical energy into hydraulic energy and electrical energy and comprising your steps of:

* supply an electric generator according to one embodiment of the invention, * supply fluid with the fluid inlet of said electric generator, "supply mechanical energy to the drive means of said electric generator so as to rotate the pinion of said electric generator so that it drives the crown and the rotor of said electric generator, your rotations of the pinion and of the crown creating a pumping of the fluid from the fluid inlet to the fluid outlet of said electric generator, and the rotation of the rotor relative to the stator of said electric generator generating electrical energy in the stator coils.

The advantages mentioned for the device apply mutatis mutandis to the method.

Brief description of the figures Other characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended figures among which:

- Figure 1 is an exploded view of an electric generator according to a mode of realisetlon of the invention, and

FIG. 2 is a sectional view of an electric generator in an embodiment of the invention,

IViodas for Carrying Out the Invention The present invention is described with particular embodiments and references to figures, but the invention is not

BE2017 / 5005 limited by these, The drawings or figures described are only schematic and are not limiting, In the context of this document, the terms "first" and "second" serve only to differentiate the different elements and do not imply order between these elements.

Su? the figures, identical or similar elements may bear the same references, FIG. 1 is an exploded view of an electric generator 1 according to an embodiment of the invention. The electric generator comprises a pinion 11, a crown 12 arranged around the pinion 11 and a drive means mechanically coupled to the pinion 11. The drive means is provided for supplying the pinion 11 with mechanical energy from a mechanical device d drive outside the electric generator 1. According to one embodiment, the crown 12 and the pinion 11 have parallel axes of rotation and offset with respect to each other. In one embodiment, the drive means is fixed to a surface of the pinion 11 perpendicular to the axis of rotation of the pinion 11. Preferably, the drive means comprises a pinion shaft 23, L ' pinion shaft 23 may include meshing teeth 24 arranged to be meshed by the mechanical drive device. The pinion 11 and the crown 12 form an internal gear pump which is included in the electric generator 1, In the internal gear pump, its crown 12 is mechanically driven by the pinion 11. The pinion 11 has teeth on an outer surface which are meshed with teeth that the crown 12 has on an inner surface. The space between the pinion 11 and the crown 12 is called pumping space 6 (visible in FIG. 2). The pumping space 6 comprises a first space, or low pressure space, onto which a fluid inlet of the electric generator 1 opens, and a second space, or high pressure space, onto which a

BE2017 / 5005 fluid output of the electric generator 1, The rotations of the pinion 11 and the crown 12 have the effect of displacing a fluid from the low pressure space to the high pressure space by compressing it. The fluid leaving through the fluid outlet is thus at a higher pressure than the fluid entering through the fluid inlet.

The fluid inlet forms a first fluid connection between the low pressure space and a first fluid line which makes it possible to bring the fluid to the internal gear pump from a first piece of equipment external to the electric generator 1. The fluid output forms a second fluid connection between the high pressure space and a second fluid line which allows the fluid to flow out of the internal gear pump to bring the fluid to a second equipment external to the electric generator 1, the first and the second fluid lines are preferably part of a lubrication group comprising the electric generator 1.

The electric generator 1 also comprises a rotor 13 comprising magnets 3 and a stator 14 located around the rotor 13, The magnets 3 are mechanically coupled to the crown 12 so that all of the magnets 3 rotate with the crown 12, The magnets 3 are preferably fixed to the crown 12. The magnets 3 are preferably permanent magnets. In one embodiment, the rotor 13 comprises a support for a magnet 18 mechanically coupling the magnets 3 to the crown 12. Optionally, the rotor 13 can comprise a rub 19 making it possible to increase its solidity. The stator 14 comprises conductive coils arranged so that the rotation of the rotor 13 generates electrical energy there. In one embodiment, the rotor 13 and the stator 14 are configured in a squirrel cage.

The electric generator 1 also includes an electrical connection means (nomreprésenîé) electrically connected to the bousnes of the stator 14 and making it possible to transfer the electric energy

BE2017 / 5005 generated in your coils with one or more auxiliary electrical device (s). Preferably, the electrical connection means comprises an electrical wire or a plurality of electrical wires. The electrical connection means allows electrical or electromagnetic coupling between the coils and the auxiliary electrical device. The connection means thus makes it possible to supply electricity to the auxiliary electrical device. The auxiliary electrical device is preferably part of a lubrication group in which the electric generator 1 is integrated. The auxiliary electrical device is preferably part of a turbomachine in which the electric generator 1 is integrated.

In one embodiment, the electric generator 1 comprises an interruption means arranged to interrupt the supply of electric energy by the electric generator 1 while maintaining the rotations of the pinion 11 and the crown 12, so as to continue the fluid compression provided by the electric generator 1.

The electric generator 1 is preferably arranged so that the electric power that it generates is from 0.1 to 100 W, more preferably between 1 and 50 W, even more preferably between 2 and 10 W, This corresponds to the powers generally required by auxiliary electrical devices such as sensors.

The electric generator 1 is preferably arranged so that the electric voltage that it generates is 1 mV at 10 V, more preferably 10 mV at 1 V. This corresponds to the voltages generally required by auxiliary electrical devices such as sensors, the electric generator 1 is preferably included in a lubrication group. Preferably, the lubrication group is included in a turbomachine. The mechanical drive device is preferably included in the turbomachine or in the lubrication group. According to one embodiment, the mechanical drive device comprises a drive shaft of the turbomachine. According to a

BE2017 / 5005 embodiment, the mechanical drive device includes a reduction box. The motor shaft can be mechanically connected in rotation with the reduction box, for example by a gear, and the reduction box can be mechanically connected by means of driving the electric generator 1, for example by a gear. Thus, the rotation of the motor shaft drives the rotation of the pinion 11.

[0861] In one embodiment, the electrical generator 1 is arranged so that there is a fluid connection between the pumping space 6 is the rotor 13 so that the rotor 13 is immersed in the fluid,

This ensures good lubrication of the rotor 13. The fluid communication can for example be done via a clearance space between the crown 12 and elements adjacent to the crown 12 and offset axially with respect to the crown 12.

In one embodiment, the electric generator 1 comprises a sealing jacket 15 between the rotor 13 and the stator 14 to prevent the fluid pumped by the internal gear pump from coming into contact with the stator 14.

In one embodiment, the sealing jacket 15 serves to compensate for the rotor 13. For example, the rotor 13 and the inner surface of the sealing jacket 15 can be in fluid contact with the pumping space 8, which perniet the fluid to bathe the rotor 13 and to create a lubricating film between the rotor 13 and the interior surface of the sealing jacket 15 for fear that the sheathing jacket 15 will serve to smoothly smooth the rotor 13, [ 8884] Figure 2 is a sectional view of the electric generator 1 in one embodiment of the invention. FIG. 2 illustrates a casing 18 of the electrical-generator 1, The casing 18 has an internal surface 17. The internal surface 17 preferably has a cylindrical part having as axis of revolution the axis of rotation of the crown 12. The internal surface 17 preferably two end parts (not shown) at the ends

BE2017 / 5005 of the cylindrical part. The end portions can be essentially flat.

The interior surface 17 defines a cavity in which the pinion 11, the crown 12, the rotor 13 and the stator are located. In one embodiment, the coils of the stator 14 are fixed to the interior surface 17.

The casing 16 preferably has a first opening for the entry of the fluid into the pumping space 6. This first opening forms part of the fluid inlet of the electric generator 1. The first opening preferably has a direction having a component parallel to the axis of rotation of the crown 12, In other words, the first opening is at least partially axial. This simplifies the arrangement of the generator. For example, the first opening may be in one of the end parts of the lower surface 17.

The casing 16 preferably has a second opening for setting the fluid of the pumping space 6. This second opening is part of the fluid output of the electric generator 1, The second opening preferably has a direction having a component parallel to the axis of rotation of the crown 12. In other words, the second opening is at least partially axial. This simplifies the arrangement of the generator. For example, the second opening may be in one of the end portions of the lower surface 17.

The housing 16 preferably has a third opening for the passage of the drive means, The third opening is preferably in the continuation of the axis of rotation of the pinion 11. For example, the third opening may be in a end portions of the interior surface 17. The third opening can be arranged to allow the pinion shaft 23 to pass. The meshing teeth of the pinion shaft 23 are preferably outside the casing 16.

BE2017 / 5005 The casing 16 preferably has a fourth opening for the passage of the electrical connection means, In other words, the invention relates to a generator-pump device integrating a pump and a electric generator in a particularly reduced volume. -A rotation of a pinion shaft 23 causes a rotation of a pinion 11 which causes a rotation of a crown 12. The rotations of the pinion 11 and of the crown 12 create a pumping of fluid from a fluid inlet to a fluid output from the device. Magnets 3 are fixed on the crown 12 so as to form a rotor 13. The rotation of this rotor 13 relative to a stator 14 produces electrical energy.

The present invention has been described in relation to specific embodiments, which have a purely illustrative value and should not be considered as limiting. In general, the present invention is not limited to the examples illustrated and / or described above. The use of the verbs "to understand", "to include", "to include", or any other variant, as well as their conjugations, cannot in any way exclude the presence of elements other than those mentioned. The use of the indefinite article "a", "an", or of the definite article "the", "the" or "I", to introduce an element does not exclude the presence of a plurality of these elements. The reference numbers in the claims do not limit their scope,

BE2017 / 5005

Claims (15)

Claims 1, electric generator (1) comprising ® a pinion (11), “a drive means mechanically coupled to the pinion (11) so as to drive the pinion (11) in rotation, and designed to be mechanically coupled to a mechanical device drive, * a crown (12) arranged around the pinion (11) to be able to be driven in rotation by the pinion (11) so as to form an internal gear pump with the pinion (11), "a fluid inlet allowing to supply fluid to the internal gear pump from outside the electric generator (1), ® a fluid outlet allowing fluid to flow out of the internal gear pump to the outside of the electric generator (1), magnets (3) mechanically coupled to the crown (12) so as to rotate with it to form a rotor (13), ® a stator (14) arranged around the rotor (13) and comprising coils so that a rotation of the rotor (13) generates a th electrical energy in said coils, and ® an electrical connection means electrically connected to the coils and. arranged to transfer electrical energy generated in said coils to an auxiliary electrical device, so that the electrical generator (1) is capable of compressing a fluid and generating electrical energy when the pinion (11) is rotated by the training medium 2. Electric generator (1) according to claim 1, characterized in that the drive means is fixed to the pinion (11). BE2017 / 5005 3. Electric generator (1) according to the preceding claim, characterized in that the drive means comprises a pinion shaft (23), 4. Electric generator (1) according to the preceding claim, characterized in that the pinion shaft (23) comprises meshing teeth (24) arranged to be meshed by the mechanical drive device, 5. Electric generator (1) according to any one of the preceding claims, characterized in that the electrical connection means comprises an electric wire or a plurality of electric wires, 6. Electric generator (1) according to any one of the preceding claims, characterized in that it comprises a fluid connection between a pumping space (8) located between the pinion (11) and the crown (12) and the rotor. (13), so that the rotor (13) is immersed in a fluid circulating in the pumping space (8), 7. Electric generator (1) according to any one of the preceding claims, characterized in that it further comprises a sealing jacket (15) located between the rotor (13) and the stator (14), 8. Electric generator (1) according to the preceding claim, characterized in that the sealing jacket (15) is arranged to serve as a bearing for the rotor (13), 9. Electric generator (1) according to any one of the preceding claims, further comprising an interruption means making it possible to interrupt the transfer of electric energy while maintaining the rotations of the pinion (11) and the crown (12 ), BE2017 / 5005 10. Electric generator (1) according to any one of the preceding claims, characterized in that it further comprises a casing (16), an inner surface (17) of which defines a cavity in which the pinion is located ( 11), the crown ( 12), te rotor ( 13) and the stator (14), the stator (14) 5 being mechanically coupled to said interior surface (17) and the casing (16) being pierced with a first opening forming part of the fluid inlet, a second opening forming part of the fluid outlet and a third opening for the training medium. 10 11, electrical generator (1) according to any one of the preceding claims, characterized in that the fluid inlet and outlet have a direction having a component parallel to the axis of rotation of the crown (12), 16 12. Lubrication group comprising an electric generator (1) according to any one of the preceding claims and an auxiliary electric device electrically connected to the electric generator (1) via the electrical connection means. 20 13, A turbomachine, in particular for an aircraft, comprising "an electrical generator (1) according to any one of claims 1 to 11," an auxiliary electrical device electrically connected by means of electrical connection of said electrical generator (1), and 25 ® a mechanical drive device comprising a drive shaft and mechanically coupled by means of the drive of said electric generator (1), so as to rotate the pinion (11) of said electric generator (1) via said drive means . BE2017 / 5005 14. Turbomachine according to the preceding claim, wherein the mechanical drive device further comprises a reduction box and / or gears mechanically coupling the motor shaft to the drive means. 15. Method for converting mechanical energy into hydraulic energy and electrical energy and comprising the steps of: * provide an electric generator (1) according to any one of claims 1 to 11, 10 “supplying fluid to the fluid inlet of said electric generator (1), * supplying mechanical energy by means of drive of said electric generator (1) so as to rotate the pinion (11) of said electric generator (1) so that '' it drives the crown (12) and the rotor (13) of said electric generator (1), the rotations of the pinion (11) 15 and the crown (12) creating a pumping of the fluid from the fluid inlet to the fluid setting of said electric generator (1), and the rotation of the rotor (13) relative to the stator (14) of said electric generator (1) generating electrical energy in the stator coils (14). BE2017 / 5005 BE2017 / 5005 BE2017 / 5005 SHORT Dynamo-pump The present invention relates to a device integrating a pump and an electric generator in a particularly reduced volume. A rotation 5 of a pinion shaft (23) causes a rotation of a pinion (11) which causes a rotation of a crown (12). The rotations of the pinion (11) and the crown (12) create a pumping of fluid from a fluid inlet to a fluid outlet of the device. Magnets (3) are fixed on the crown (12) so as to form a rotor (13). The rotation of this rotor (13) 10 relative to a stator (14) results in the production of electrical energy. HG. 1 PATENT COOPERATION TREATY