Hydrodynamic device for decelerating a vehicle

Abstract

Hydrodynamic device (1), in particular retarder, for decelerating a vehicle, comprising: - a rotor (2) with impellers for accelerating a working fluid, - a stator (3) with impellers for slowing down a working fluid, - wherein the rotor (2) and the stator (3) form a toroidal working chamber (4) which can be filled with a working fluid, - wherein the rotor (2) is formed with a connecting device (5) by means of which the rotor (2) can be connected to a shaft (31) for torque transmission to a vehicle, e.g. to a cardan shaft of a vehicle, and - a housing (6) with inside and outside, - wherein the rotor (2) and the stator (3) are arranged within the housing, wherein - the hydrodynamic device (1) is of modular design, wherein the housing (6) has only two types of connection on its outer side, namely at least one fluid inlet (7) and at least one fluid outlet (8) for a working fluid, wherein the hydrodynamic device (1) comprises a sealing plate (20) in order to seal the working chamber (4) in such a way that an escape of working fluid via the connecting device (5) can be prevented, and - wherein the sealing plate (20) is fastened to the rotor (2).

Description

The invention relates to a hydrodynamic device, such as a retarder, for decelerating a vehicle.Known hydrodynamic devices or retarders, also called flow brakes, generally have a housing made of cast metal. These hydrodynamic devices are therefore heavy in weight and are also cost-intensive to produce.As prior art, reference is made to CN 105909752 A, DE 10 2004 003 949 A1, DE 10 2016 216 593 A1, DE 198 07 280 A1 and U.S. Pat. No. 4,454,935 A, each of which discloses hydrodynamic devices for decelerating vehicles.In addition, a manufacturer of trucks, for example, is tied to the predetermined dimensions or to the installation space of the housings produced from casting. In the event of a defect, the replacement of a hydrodynamic devices is also complicated and time-consuming.It is therefore an object of the present invention to specify a hydrodynamic device, such as a retarder, for decelerating a vehicle, which can be produced cost-effectively and in a material-saving manner and has a low weight, and can additionally ensure simple replacement in the event of a defect.This object is achieved according to the invention by the features of the independent claim. Further advantageous developments are the subject matter of the dependent claims.The present invention comprises a hydrodynamic device, such as a retarder or a flow brake, for decelerating a vehicle.The hydrodynamic device includes a rotor having vaned wheels for accelerating a working fluid and a stator having vaned wheels for decelerating a working fluid. Thus, motive energy can be easily converted into thermal energy.The rotor and the stator form a working chamber, for example a toroidal working chamber, which can be filled with a working fluid.Furthermore, the rotor is designed with a connecting device, with the aid of which the rotor can be connected to a shaft for transmitting torque to a vehicle, for example to a cardan shaft of a vehicle.Furthermore, the hydrodynamic device comprises a housing with an inner side and an outer side, wherein the rotor and the stator are arranged inside the housing.In addition, the hydrodynamic device is of modular design, wherein the housing has only two connection types on its outer side, namely at least one fluid inlet and at least one fluid outlet for a working fluid.In addition, it is also possible for the housing to have on its outer side only one further type of connection, namely one or a single fastening device for detachably fastening the housing to a superordinate housing of a subassembly. It is thus conceivable for the housing to have only three types of connections on its outer side.In other words, the housing comprises no further interfaces or connections apart from at least one fluid inlet and the at least one fluid outlet and optionally apart from a fastening device with which the hydrodynamic device can be detachably fastened, for example, to a housing of a superordinate assembly. The housing also does not comprise any further receptacles for, for example, pressure chambers for actuating displaceable cylinder-like elements. Interfaces and connections other than the mentioned (fluid inlet, fluid outlet and optionally fastening device) are therefore not present on the outer side of the housing. Consequently, the hydrodynamic device as a whole can be mounted on a shaft for transmitting torque with a vehicle and can also be easily replaced.In yet another words, the hydrodynamic device is designed as an exchangeable module and / or also as a retrofittable module and / or even as a plug-on module, in which the housing only encloses the working chamber and, for example, only offers the connections necessary for a working fluid. Optionally, the housing can also provide a fastening device, e.g. a single fastening device.The fastening device serves to secure not only the housing but also the stator against rotation. Consequently, the hydrodynamic device can be easily integrated into a larger structural unit or into a higher-order structural unit, wherein replacement and rapid assembly and disassembly are ensured by plugging on or removing the hydrodynamic device as a whole.Summarizing, it can thus be stated that this embodiment thus creates a modular unit which can be detached as a whole from a shaft for transmitting torque with a vehicle and from a housing of a superordinate assembly and can be fastened as a whole to a shaft for transmitting torque with a vehicle and to a housing of a superordinate assembly. In other words, the hydrodynamic device can be designed such that it can be plugged as a whole or completely or as a unit onto a connection or onto a shaft or onto an interface and can also be pulled off again. This creates simple assembly and disassembly of the hydrodynamic device, namely by being plugged onto a shaft for torque transmission with a vehicle or by being pulled off a shaft for torque transmission with a vehicle and by being fastened to a housing of a superordinate assembly and being released from a housing of a superordinate assembly. Consequently, as already mentioned, the hydrodynamic device is of modular design, wherein it is of a modular design or as a self-contained unit which is easily and easily replaceable. Furthermore, in this way only the hydrodynamic part of a hydrodynamic system or only the hydrodynamic device can be mounted or dismounted.Furthermore, the housing can be designed and shaped such that its shape follows the shape of the rotor and the stator, so that the hydrodynamic device requires a small installation space.The housing can enclose the rotor and the stator in such a way that the rotor and the stator are connected to one another in an individable manner. Only by destroying the housing can the hydrodynamic device be disassembled. In other words, the housing encapsulates the rotor and the stator.Furthermore, the housing can surround the rotor and the stator except for an access, e.g. completely. The access serves for connecting the hydrodynamic device or the rotor to a shaft for transmitting torque with a vehicle. The shaft can be made available by a superordinate assembly.In addition, the housing can have the same wall thickness in a cross section in the axial direction as the rotor and / or as the stator.The housing can have a wall thickness of 3 to 10 mm, for example of 5 mm.Furthermore, the housing can have a formable material. The housing can also have sheet metal as material. Thus, the hydrodynamic device or its housing, but also, for example, its stator and / or rotor, can be manufactured or provided from sheet metal, whereby it can be designed as a sealed unit independently of a superordinate assembly.Furthermore, the housing may comprise a first housing part which follows the shape of the rotor.In this case, the first housing part can be designed semi-toroidally with an access for a shaft for transmitting torque with a vehicle.In addition, the first housing part can accommodate the rotor in its interior.Furthermore, the first housing part can have an access to the interior of the housing, which is designed and arranged such that a shaft for transmitting torque with a vehicle and for connection to the rotor can be guided through the first housing part. As a result, the hydrodynamic device can transfer kinetic energy of a vehicle into friction and thus into heat.In addition, the first housing part can have a seal at the access, which seal sealingly abuts against the housing and against the rotor or which seal sealingly abuts against the housing and against the connecting device.The connecting device can connect the rotor to a shaft for torque transmission to a vehicle.Furthermore, the housing can comprise a second housing part which follows the shape of the stator.The second housing part can have the at least one fluid inlet and the at least one fluid outlet.In addition, the second housing part can be pot-shaped or plate-shaped or shell-shaped.The second housing part can also accommodate the stator, for example completely, in its interior.In this case, the second housing part can bear sealingly against the stator by means of two contact surfaces, which can each comprise a seal, in order to form two chambers, fillable with working fluid, in each case between the stator and the second housing part.The second housing part can form a rotation prevention means together with the stator in order to prevent a rotation of the stator relative to the housing.The anti-rotation device can form a seal together with the housing, for example together with the first and second housing parts. As a result, the working chamber is sealed or a working fluid is prevented from exiting the working chamber. The anti-rotation device can be designed as an axial toothing or as a Hirth toothing.Furthermore, the housing may comprise a first housing part which follows the shape of the rotor. The housing can also comprise a second housing part which follows the shape of the stator. In this case, the first and the second housing part can be connected to one another in a materially integral manner. This makes it possible to achieve simple and rapid production and sealing of the housing.Furthermore, the stator can be mounted on a shaft for torque transmission with a vehicle with the aid of a rolling bearing. As a result, the stator can be decoupled from the rotation of the shaft.Alternatively, it is also possible for the stator to be mounted on the rotor or on a sealing plate of the hydrodynamic device with the aid of a rolling bearing. With the aid of this configuration, the stator can be decoupled from the rotation of the shaft.In both cases, the rolling bearing can be designed as a tapered ball bearing or as a tapered roller bearing.Furthermore, the rotor can be mounted with respect to the housing by means of at least one rolling bearing.Thus, the rotor can be mounted between a first and / or a second housing part of the housing with the aid of at least one rolling bearing. Thus, the rotation of the rotor is decoupled from the housing.Furthermore, the at least one rolling bearing can be designed as an axial bearing, for example as an axial cylindrical roller bearing. This can exclusively transmit forces in the axial direction between the rotor and the stator.Furthermore, according to the invention, the hydrodynamic device comprises a sealing plate in order to seal off the working chamber in such a way that an escape of working fluid via the connecting device can be prevented.In this case, the sealing plate can be fastened to the rotor, for example in a torque-proof manner. In addition, the sealing plate and the rotor can be riveted to one another or welded to one another.Furthermore, the connecting device can have a hub of a shaft-hub connection.It can be provided that the rotor forms or has the connecting device.Alternatively, the connecting device can be designed as an intermediate piece which can be connected to the rotor in a torque-proof manner on the one hand and can have a hub of a shaft-hub connection on the other hand.The connecting device and the rotor can be riveted together.Furthermore, the stator can have at least one inflow and at least one outflow for a working fluid. Thus, working fluid can flow into and out of the working space.The at least one fluid inlet and the at least one inflow can be connected to one another in a fluid-communicating manner.The at least one fluid outlet and the at least one outlet can be connected to one another in a fluid-communicating manner.Furthermore, the fastening device can be fastened or riveted to the housing, for example to a second housing part. Alternatively, the fastening device can be formed by the housing.The fastening device can be designed as a sheet metal and / or can have at least one bore for a screw.Furthermore, the fastening device formed with at least one bore can be arranged on the second housing part.In addition, the fastening device can be fastened to the housing or to the second housing part of the housing by means of at least one rivet.The concept of the invention presented above is expressed in other words again and additionally below.This concept relates--shown in simplified form--to a hydrodynamic device or a retarder which can be completely encapsulated and formed, for example, from sheet metal and which can be designed as a sealed unit independently of the remaining system or of a superordinate assembly. In this case, the hydrodynamic device can be coupled via a spline toothing to a drive shaft or to a shaft for transmitting torque to a vehicle, for example to a cardan shaft of a vehicle, and can be flange-connected, for example, to an existing housing of a superordinate assembly.The retarder or the hydrodynamic device can be designed as a completely encapsulated, independent unit with a housing made of sheet metal.The sheet metal housing can have a plurality of parts which can be welded or soldered to one another, for example.A drive can be effected via a spline on the rotor or via a rotor hub.A connection to a housing (e.g. transmission housing or housing of a superordinate assembly), for example by means of a screw connection possibility attached to the housing of the hydrodynamic device, may be provided.A screw-on possibility can also be located on the housing of the hydrodynamic device.A screw-on possibility can be realized via a screw-on plate which is connected to the retarder housing. This results in greater flexibility in the connection options to a housing.A screwing plate can be connected to the housing of the hydrodynamic device, for example, via extended rivets. Alternatively, the sheet metal can be soldered or welded on.The screw connection possibility and / or the screw connection possibility can be realized with the aid of a fastening device for the detachable fastening of the housing to a superordinate housing of a subassembly.In contrast to a torque converter in which the housing rotates as well and is connected fixedly to the pump or is the pump, in a retarder the housing or its housing can be screwed against a fixed housing of a superordinate assembly.A further fundamental difference of the retarder or of the hydrodynamic device from the converter is the requirement that the retarder can be operated specifically with different fill levels. For this purpose, the retarder has at least one inflow and at least one outflow possibility.The invention is explained in more detail below on the basis of exemplary embodiments in conjunction with associated drawings. The following are shown schematically: FIG. 1 is a sectional view of a hydrodynamic device according to a first exemplary embodiment; FIG. 2 is a sectional view of a hydrodynamic device according to a second exemplary embodiment; and FIG. 3 is a sectional view of a hydrodynamic device according to a third exemplary embodiment.In the following description, like reference numerals are used for like items.FIG. 1 shows a sectional view of a hydrodynamic device 1 according to a first exemplary embodiment.More specifically, Fig. 1 shows a hydrodynamic device 1, such as a retarder, for decelerating a vehicle.The hydrodynamic device 1 comprises a rotor 2 with vane wheels for accelerating a working fluid and a stator 3 with vane wheels for decelerating a working fluid.The rotor 2 and the stator 3 form a toroidal working chamber 4 which can be filled with a working fluid.The rotor 2 is formed with a connecting device 5, with the aid of which the rotor 2 can be connected to a shaft 31 for transmitting torque to a vehicle, for example to a cardan shaft of a vehicle.Furthermore, the hydrodynamic device 1 has a housing 6 with an inner side and an outer side, wherein the rotor 2 and the stator 3 are arranged inside the housing.In addition, the hydrodynamic device 1 is of modular design, wherein the housing 6 has only three connection types on its outer side, namely a fluid inlet 7 and a fluid outlet 8 for a working fluid as well as a fastening device 23 for the detachable fastening of the housing 6 to a superordinate housing 32 of an assembly 30.In other words, the hydrodynamic device 1 is designed as an exchangeable, retrofittable, plug-on module, in which the housing 6 merely encloses the working chamber 4. In addition, the housing 6 also has the fastening device 23 in order to secure the stator 3 against rotation. Consequently, the hydrodynamic device 1 can be easily integrated into a larger structural unit or into a higher-order structural unit 30, wherein replacement and rapid assembly and disassembly are ensured by plugging on or removal.Furthermore, FIG. 1 shows that the housing 6 is formed and shaped such that its shape follows the shape of the rotor 2 and of the stator 3, so that the hydrodynamic device 1 requires a small installation space and has a low weight.The housing 6 encloses the rotor 2 and the stator 3 in such a way that the rotor 2 and the stator 3 are connected to one another in an individable manner. Only by destroying the housing 6 is it possible to disassemble the hydrodynamic device 1. In other words, the housing 6 encapsulates the rotor 2 and the stator 3.Specifically, the housing 6 completely surrounds the rotor 2 and the stator 3 except for an access 10.As can be seen in FIG. 1, the housing 6 has the same wall thickness in a cross section in the axial direction A as the rotor 2 and the stator 3. The housing 6 has a wall thickness of 5 mm. Furthermore, the housing 6 comprises a formable material. In the present case, the housing 6 has sheet metal as material.As further shown in FIG. 1, the housing 6 includes a first housing part 6A that follows the shape of the rotor 2.The first housing part 6A is semi-toroidal with an access 10 for a shaft 31 for torque transmission with a vehicle, wherein the first housing part 6A receives the rotor 2 in its interior.As already indicated, the first housing part 6A has an access 10 to the interior of the housing 6, which access 10 is designed and arranged such that a shaft 31 for transmitting torque with a vehicle and for connection to the rotor 2 can be guided through the first housing part 6A. As a result, the hydrodynamic device 1 can transfer kinetic energy of a vehicle into friction and thus into heat.Furthermore, according to FIG. 1, the first housing part 6A has a seal 9 at the access 10, which seal sealingly abuts against the housing 6 and against the connecting device 5, wherein the connecting device 5 connects the rotor 2 to a shaft 31 for transmitting torque to a vehicle.In addition, as shown in FIG. 1, the housing 6 has a second housing part 6B which follows the shape of the stator 3.The second housing part 6B comprises the fluid inlet 7 and the fluid outlet 8, wherein the second housing part 6B is formed in a pot-shaped or plate-shaped or shell-shaped manner.Furthermore, the second housing part 6B receives the stator 3 in its interior, wherein the second housing part 6B rests with two contact surfaces 11, 12 in a sealing manner against the stator 3. As a result, two chambers 13, 14 are formed which can be filled with working fluid and are each arranged between the stator 3 and the second housing part 6B.The first and the second housing part 6A, 6B are connected to one another in a materially integral manner.According to FIG. 1, the stator 3 can be mounted on a shaft 31 for torque transmission with a vehicle by means of a rolling bearing 16. The rolling bearing 16 is designed as a spherical contact bearing.As can also be seen in FIG. 1, the connecting device 5 is designed as an intermediate piece which is connected to the rotor 2 in a torque-proof manner on the one hand and has a hub of a shaft-hub connection on the other hand. The connecting device 5 and the rotor 2 are riveted together.Furthermore, it is shown in FIG. 1 that the stator 3 has an inflow 21 and an outflow 22 for a working fluid. The fluid inlet 7 and the inflow 21 are connected to one another in a fluid-communicating manner. Likewise, the fluid outlet 8 and the outlet 22 are connected to one another in a fluid-communicating manner.Furthermore, FIG. 1 shows that the fastening device 23 is fastened or riveted to the housing 6 or to the second housing part 6B. The fastening device 23 is designed as a metal sheet and has a bore for a screw. Furthermore, the fastening device 23 is fastened to the housing 6 or to the second housing part 6B of the housing 6 by means of a rivet.FIG. 2 shows a sectional view of a hydrodynamic device 1 according to a second exemplary embodiment.Here too, a hydrodynamic device 1, such as a retarder, for decelerating a vehicle is shown, identically to FIG. 1.The hydrodynamic device 1 comprises a rotor 2 with vane wheels for accelerating a working fluid and a stator 3 with vane wheels for decelerating a working fluid.The rotor 2 and the stator 3 form a toroidal working chamber 4 which can be filled with a working fluid.The rotor 2 is formed with a connecting device 5, with the aid of which the rotor 2 can be connected to a shaft 31 for transmitting torque to a vehicle, for example to a cardan shaft of a vehicle.Furthermore, the hydrodynamic device 1 has a housing 6 with an inner side and an outer side, wherein the rotor 2 and the stator 3 are arranged inside the housing.In addition, the hydrodynamic device 1 is of modular design, wherein the housing 6 has only two connection types on its outer side, namely a fluid inlet 7 and a fluid outlet 8 for a working fluid. In addition, the housing 6 comprises a single fastening device 23 for detachably fastening the housing 6 to a superordinate housing 32 of a module 30. the hydrodynamic device 1 as a whole can thus be plugged onto a shaft 31 for transmitting torque with a vehicle and can be exchanged.Thus, the hydrodynamic device 1 is designed as an exchangeable module and / or also as a retrofittable module and / or even as a plug-on module, in which the housing 6 only encloses the working chamber 4 and only offers the connections necessary for a working fluid.Due to the high similarity between FIGS. 1 and 2, reference is made to the explanations relating to FIG. 1 with respect to the further description. Thus, unnecessary repetitions can be avoided.Therefore, only the differences between FIGS. 1 and 2 will be discussed below.Whereas in FIG. 1 the first housing part 6A comprises a seal 9 at the access 10, which seal sealingly abuts against the housing 6 and against the connecting device 5, according to FIG. 2 the first housing part 6A also has a seal 9 at the access 10, but this seal sealingly abuts against the housing 6 and against the rotor 2. Thus, the connecting device 5 can connect the rotor 2 to a shaft 31 for transmitting torque to a vehicle.In addition, FIGS. 1 and 2 show that the first and the second housing part 6A, 6B are connected to one another in a materially integral manner.Instead of the rolling bearing 16 on the shaft 31 for transmitting torque with a vehicle according to FIG. 1, the stator 3 of the hydrodynamic device 1 according to FIG. 2 is mounted on a sealing plate 20 of the hydrodynamic device 1 with the aid of a rolling bearing 17. The rolling bearing 17 is designed as a spherical contact bearing.Thus, the hydrodynamic device 1 comprises a sealing plate 20 in order to seal the working chamber 4 in such a way that an escape of working fluid via the connecting device 5 can be prevented.The sealing plate 20 is fastened to the rotor 2, wherein the sealing plate 20 and the rotor 2 are riveted together.Furthermore, in contrast to the first exemplary embodiment according to FIG. 1, the second exemplary embodiment according to FIG. 2 shows that the rotor 2 forms the connecting device 5, wherein the connecting device 5 has a hub of a shaft-hub connection.FIG. 3 shows a sectional view of a hydrodynamic device 1 according to a third exemplary embodiment.Also shown here is a hydrodynamic device 1, such as a retarder, for decelerating a vehicle.The hydrodynamic device 1 comprises a rotor 2 with vane wheels for accelerating a working fluid and a stator 3 with vane wheels for decelerating a working fluid.The rotor 2 and the stator 3 form a toroidal working chamber 4 which can be filled with a working fluid.The rotor 2 is formed with a connecting device 5, with the aid of which the rotor 2 can be connected to a shaft 31 for transmitting torque to a vehicle, for example to a cardan shaft of a vehicle.Furthermore, the hydrodynamic device 1 has a housing 6 with an inner side and an outer side, wherein the rotor 2 and the stator 3 are arranged inside the housing.In addition, the hydrodynamic device 1 is of modular design, wherein the housing 6 has only three connection types on its outer side, namely a fluid inlet 7 and a fluid outlet 8 for a working fluid as well as a fastening device 23 for the detachable fastening of the housing 6 to a superordinate housing 32 of an assembly 30.In other words, the housing 6, apart from the fluid inlet 7 and the fluid outlet 8 and apart from the fastening device 23, with which the hydrodynamic device 1 can be detachably fastened, for example, to a housing 32 of a superordinate assembly 30, comprises no further interfaces or connections.The housing 6 also does not comprise any further receptacles for, for example, pressure chambers for actuating displaceable cylinder-like elements. Interfaces and connections other than the mentioned (fluid inlet 7, fluid outlet 8, fastening device 23) are therefore not present on the outer side of the housing 6.Due to the similarity between FIGS. 2 and 3, reference is made to the explanations relating to FIG. 2 with respect to the further description. Thus, unnecessary repetitions can be avoided.Therefore, only the differences between FIGS. 2 and 3 will be discussed below.Thus, both figures show that the second housing part 6B receives the stator 3 in its interior, wherein the second housing part 6B sealingly abuts against the stator 3 by means of two contact surfaces 11, 12 which each comprise a seal. As a result, two chambers 13, 14 are formed which can be filled with working fluid and are each arranged between the stator 3 and the second housing part 6B.Furthermore, FIG. 3 shows that the second housing part 6B forms an anti-rotation device 15 together with the stator 3 in order to prevent rotation of the stator 3 relative to the housing 6.In this case, the anti-rotation device 15 forms a seal together with the housing 6, for example together with the first and second housing parts 6A, 6B, as a result of which a working fluid is prevented from leaving the working chamber 4.In this case, the first and the second housing part 6A, 6B are connected to one another in a materially integral manner.In contrast to FIG. 2, in FIG. 3 the rotor 2 is mounted with respect to the housing 6 by means of a plurality of rolling bearings 18, 19.Specifically, the rotor 2 is supported between the first and second housing parts 6A, 6B of the housing 6 by means of the rolling bearings 18, 19. The roller bearings 18, 19 are designed as axial bearings, e.g. as axial cylindrical roller bearings, which exclusively transmit forces in the axial direction A between the rotor 2 and the stator 3.Similarly to FIG. 2, in FIG. 3, the seal plate 20 is fixed to the rotor 2, but the seal plate 20 and the rotor 2 are welded to each other.As a further difference between FIGS. 2 and 3, the hydrodynamic device 1-as already mentioned-has a fastening device 23 in FIG. 2, wherein this is formed by the housing 6.List of reference characters1 Hydrodynamic device 2 Rotor 3 Stator 4 Working space 5 Connecting device 6 Housing 6A First housing part 6B Second housing part 7 Fluid inlet 8 Fluid outlet 9 Seal at access 10 Access 11 Contact surface 12 Contact surface 13 Chamber 14 Chamber 15 Anti-rotation device 16 Rolling bearing 17 Rolling bearing 18 Rolling bearing 19 Rolling bearing 20 Sealing plate 21 Inflow 22 Outflow 23 Fastening device 30 Assembly 31 Shaft 32 Housing A Axial direction R Radial direction

Claims

Hydrodynamic device (1), in particular retarder, for decelerating a vehicle, having: - a rotor (2) with vane wheels for accelerating a working fluid, - a stator (3) with vane wheels for decelerating a working fluid, - wherein the rotor (2) and the stator (3) form a toroidal working chamber (4) which can be filled with a working fluid, - wherein the rotor (2) is formed with a connecting device (5), with the aid of which the rotor (2) can be connected to a shaft (31) for transmitting torque to a vehicle, for example to a cardan shaft of a vehicle, and - a housing (6) with the inside and outside, - wherein the rotor (2) and the stator (3) are arranged within the housing, wherein - the hydrodynamic device (1) is formed in a modular manner, wherein the housing (6) has only two types of connections on its outer side, namely at least one fluid inlet (7) and at least one fluid outlet (8) for a working fluid, wherein the hydrodynamic device (1) comprises a sealing plate (20) in order to seal the working chamber (4) in such a way that an escape of working fluid via the connecting device (5) can be prevented, and - wherein the sealing plate (20) is fastened to the rotor (2).Hydrodynamic device according to claim 1, - wherein the housing (6) is formed and shaped such that its shape follows the shape of the rotor (2) and the stator (3) so that the hydrodynamic device (1) requires a small installation space, and - wherein the housing (6) surrounds the rotor (2) and the stator (3) apart from an access (10).Hydrodynamic device according to one of the preceding claims, - wherein the housing (6) comprises a formable material.Hydrodynamic device according to one of the preceding claims, - wherein the housing (6) comprises a first housing part (6A) which follows the shape of the rotor (2), - wherein the first housing part (6A) accommodates the rotor (2) in its interior, and - wherein the first housing part (6A) has an access (10) to the interior of the housing (6) which is designed and arranged such that a shaft (31) for transmitting torque with a vehicle and for connection to the rotor (2) can be guided through the first housing part (6A).Hydrodynamic device according to one of the preceding claims, - wherein the housing (6) comprises a second housing part (6B) which follows the shape of the stator (3), - wherein the second housing part (6B) accommodates the stator (3) in its interior, and - wherein the second housing part (6B) rests sealingly against the stator (3) by means of two contact surfaces (11, 12) in order to form two chambers (13, 14), fillable with working fluid, in each case between the stator (3) and the second housing part (6B).Hydrodynamic device according to Claim 5, - wherein the second housing part (6B) forms an anti-rotation device (15) together with the stator (3) in order to prevent rotation of the stator (3) relative to the housing (6).Hydrodynamic device according to one of the preceding claims, - wherein the connecting device (5) has a hub of a shaft-hub connection, - wherein either the rotor (2) forms the connecting device (5), or - wherein the connecting device (5) is formed as an intermediate piece which is connected to the rotor (2) in a torque-proof manner on the one hand and has a hub of a shaft-hub connection on the other hand.Hydrodynamic device according to one of the preceding claims, - wherein the fastening device (23) is fastened or riveted to the housing (6), for example to a second housing part (6B), or - wherein the fastening device (23) is formed by the housing (6).

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