Arrangement having a drive unit, a working machine and a damping unit

Abstract

An arrangement (1) forms, with a drive unit (2), a working machine (3) and a damping unit (6), a device for compressing gases and / or gas mixtures, in particular hydrogen. The damping unit (6) is designed as a damper that is integrated into a flywheel.

Description

[0001] DESCRIPTION

[0002] Arrangement with a drive unit, a working machine and a damping unit

[0003] The invention relates to an arrangement comprising a drive unit, a working machine and a damping unit according to the preamble of claim 1.

[0004] Such an arrangement includes, for example, an electric drive unit in the form of an electric motor and a working machine as a compressor for gases and / or gas mixtures.

[0005] Gases and / or gas mixtures include pure and mixed gases, as well as air. Hydrogen, also known as a gas mixture, is one example among many gases.

[0006] The damping unit can be a torsional vibration damper, such as a damper integrated into the flywheel, also known as a Flywheel Integrated Damper (FID).

[0007] These vibration dampers for torsional vibrations are available in various designs. For damping torsional vibrations, for example, torsional vibration dampers are used between a shaft, such as a crankshaft, an internal combustion engine, such as a piston engine, and a drive train. Such a torsional vibration damper can also be mounted at a free end or directly on the shaft.

[0008] A torsional vibration damper can be designed as a so-called viscous damper, with, for example, a housing as the primary mass, an annular working chamber, and a flywheel as the secondary mass. The flywheel is arranged within the annular working chamber, surrounded by a viscous damping medium, allowing it to rotate relative to the housing.

[0009] Documents DE 30 20 993A1, DE 103 01 707A1, and DE 10 2018 124 383 A1 provide exemplary designs. Torsional vibration dampers, particularly those integrated into a flywheel, require, depending on their size and available space, a tool or aid to handle and / or rotate them during assembly, disassembly, and maintenance, and / or to rotate the system to a defined angular position around its longitudinal axis for assembly, disassembly, and maintenance. For this purpose, the damper housing may have bores for the removable attachment or fastening of the necessary tool. These bores for attaching a lifting tool or lifting gear are referred to as lifting bores.

[0010] Furthermore, these bores can be designed as so-called barring holes for attaching or mounting a twisting tool.

[0011] However, there is a constant need for further development and improvement in the damping of torsional vibrations, while enabling a compact design.

[0012] Furthermore, there is a constant need for greater functionality with a compact design and less effort required for assembly and maintenance.

[0013] The object of the present invention is therefore to create an improved arrangement comprising a drive unit, a working machine and a damping unit, whereby improved vibration damping is achieved.

[0014] The problem is solved by the object according to claim 1.

[0015] One inventive idea is to use a damper integrated into a flywheel as a damping unit.

[0016] An arrangement according to the invention, which forms a device for compressing gases and / or gas mixtures, in particular hydrogen, comprises a drive unit, a working machine and a damping unit. The damping unit is designed as a damper integrated in a flywheel.

[0017] A particular advantage is that the damping unit is a flywheel integrated damper. Tests have shown that the arrangement with an electric motor as the drive unit and the damping unit as a flywheel integrated damper is particularly advantageous for this application.

[0018] Another advantage is optimized use of installation space, which allows as much installation space as possible to be used for the secondary mass (flywheel ring).

[0019] Advantageous embodiments of the invention are specified in the dependent claims.

[0020] In one embodiment, the damping unit is arranged in series with the drive unit and the driven machine on a common shaft, thus preventing rotation. This results in an advantageously compact design.

[0021] In one embodiment, the drive unit is designed as an electric motor. Tests have shown that the arrangement with an electric motor as the drive unit and the damping unit as a damper integrated into a flywheel (flywheel integrated damper) is particularly advantageous.

[0022] Supplying and controlling the drive unit as an electric motor with electrical energy is advantageous using cable lines, as these require only minimal installation effort.

[0023] It is advantageous if the drive unit is an asynchronous three-phase motor, synchronous motor, DC motor or the like, since these components are common parts that are available at a low cost and in high quality.

[0024] In another version, the working machine is a compressor designed as a piston compressor. The advantage here is that piston compressors are easy to maintain and relatively robust.

[0025] In this embodiment as well, tests have shown that the arrangement with a working machine, which is a piston compressor, with an electric motor as the drive unit and the damping unit as a damper integrated in a flywheel (flywheel integrated damper), is particularly advantageous. A further embodiment provides that the damping unit comprises a damper housing, a flywheel ring rotatably arranged about a pivot axis in a working chamber of the damper housing, and a cover that closes the working chamber. At least one interface, each with a receptacle for a removable lever element, is attached laterally to the outer diameter of an end face of the damper housing.

[0026] It is advantageous that the damping unit also has interfaces for handling with a suitable handling tool, as this facilitates assembly and maintenance.

[0027] This offers the particular advantage that the interfaces are located externally on the side of the damper housing and do not affect its strength and mass, or only to a minor extent.

[0028] The ability to mount and dismount, for example, lever elements in the installed state of the damping unit, in order to rotate the shaft with the units attached to it in a rotationally fixed manner and to bring it into a required angular position, is thus made particularly advantageously compact and space-saving in this arrangement.

[0029] In this application, the term "interface" means a component or a section of a component which has a molded receptacle, e.g. a bore, or a protruding receptacle, e.g. a bolt, wherein the respective receptacle interacts with a corresponding form (e.g. bolt for the molded receptacle and molding for the protruding receptacle) of a lever element.

[0030] It is advantageous if the at least one interface of the damping unit is connected to an interface ring, wherein the interface ring is mounted coaxially to a rotational axis of the arrangement on a housing end face of the damper housing. The interface ring can advantageously be manufactured separately and is a simple component.

[0031] The ring design advantageously allows for a modular option for the interfaces with the mountings for the lever element, as this enables modular use with various damping units. In one embodiment, lifting bores are arranged around the circumference of the damper housing, extending radially outwards within the damper housing and opening onto an outer surface of the housing. These lifting bores are advantageously used for the direct attachment of a lifting harness or eyebolts, to which a lifting harness or lifting tool can be attached.

[0032] Another design provides for at least two lifting holes to be arranged diametrically around the circumference of the damper housing. This is advantageous for load distribution.

[0033] In a further embodiment, the lifting bores are arranged such that they are located in the center of gravity plane of the damping unit or at a small axial distance from the center of gravity plane of the damping unit, with this axial distance ranging from approximately one-third to one-seventh of the total axial damper width, i.e., the total width of the damping unit. This design offers the advantage of easier installation and removal of the torsional vibration damping unit during assembly and maintenance.

[0034] The following advantages result from the arrangement according to the invention:

[0035] • Optimized use of installation space to achieve as much installation space as possible for the secondary mass (flywheel ring) of the damping unit.

[0036] • A weight-optimized design

[0037] • A modular option for the interfaces with the mounts for the lever element, as this allows for modular use with various damping units.

[0038] • The ability to disassemble the lever elements while the damping unit is installed.

[0039] • At very low and / or high torsional vibration frequencies, the damping unit still behaves like a flywheel.

[0040] • The images of the interfaces can also be used to balance the damping unit.

[0041] • One cost advantage is that the damper and flywheel are combined in one component.

[0042] Exemplary embodiments of the invention are described below with reference to the accompanying drawings. The invention is not limited to these exemplary embodiments. In particular, individual features of the following exemplary embodiment can be used not only in these but also in other exemplary embodiments.

[0043] They show:

[0044] Figure 1 shows a schematic representation of an embodiment of an arrangement according to the invention, comprising a drive unit, a working machine, and a damping unit; and

[0045] Figures 2-3 show schematic partial sectional views of a damping unit of the embodiment according to Figure 1.

[0046] Figure 1 shows an embodiment of an arrangement 1 according to the invention with a drive unit 2, a working machine 3 and a damping unit 6.

[0047] Arrangement 1 is, for example, a device for supplying compressed air generated by the working machine 3. Arrangement 1 can also be a device for compressing gases and / or gas mixtures, in particular hydrogen. The drive unit 2 drives the working machine 2 by means of a shaft 5.

[0048] The drive unit 2 is designed as an electric motor. The electric motor can be, for example, an asynchronous three-phase motor, a synchronous motor, a DC motor, or the like.

[0049] An output shaft of the drive unit 2, not shown but easily imaginable, is coupled to the shaft 5 via a torsionally rigid coupling 4 and thus transmits a torque to the working machine 3.

[0050] The working machine 3 is a compressor and is designed as a piston compressor.

[0051] Shaft 5 has a rotational axis 1a. The driven machine 3, the coupling 4, and the damping unit 6 are arranged coaxially on this common shaft 5 with respect to a common rotational axis 1a and are fixed against rotation. The damping unit 6 is mounted on shaft 5 in series with the coupling 4 and the driven machine 3, between the drive unit 1 or the coupling 4 and the driven machine 3, and is fixed against rotation. This can be achieved, for example, by means of suitable fastening elements on a shaft flange, which is not shown but is easily conceivable. In this way, the damping unit 6 is rigidly coupled to shaft 5.

[0052] The damping unit 6 serves to dampen torsional vibrations of the system, which can be generated by the drive machine 1, the working machine 2, the coupling 4 and / or the shaft 5.

[0053] Figure 2 shows a schematic partial sectional view of an embodiment of the damping unit 6 of the arrangement 1 according to the invention. Figure 3 shows a schematic perspective view of the damping unit 6 according to Figure 2.

[0054] The damping unit 6 is also referred to as a flywheel integrated damper and comprises a damper housing 7, a flywheel ring 8, a cover 9 and at least one interface S.

[0055] In this application, the term "interface" means a component or a section of a component which has a receptacle, e.g. a bore, or a protruding form, e.g. a bolt, wherein the respective receptacle interacts with a corresponding form (e.g. bolt for the molded receptacle and molding for the protruding receptacle) of a lever element.

[0056] The damper housing 7 is designed here in a ring shape with a working chamber 7a, which is closed to a first end face 7b and open to a second end face 7c, which is opposite the first end face 7b.

[0057] The flywheel 8, rotatable about the axis of rotation 1a, is arranged in the working chamber 7a. The flywheel 8 is a circumferentially closed flywheel 8 and is rotatable relative to the damper housing 7 either without limit or with a limited degree of rotation.

[0058] Between an inner wall of the working chamber 7a and the flywheel ring 8, a shear gap is formed in the working chamber 7a, which is filled with a viscous damping medium, in particular a viscous fluid, such as silicone oil.

[0059] The working chamber 7a is closed at the second housing end face 7c of the damper housing 7 by an annular cover 9. The cover 9 is attached to the second housing end face 7c by means of cover fastening elements 9a, e.g. screws, and has an outer cover face 9b.

[0060] A circumferential flange 7d is formed on the inside of the annular damper housing 7, which has a through central bore 7e. The damping unit 7 is attached to / onto the shaft 5 by means of this flange 7d. This is not shown, but easily imaginable.

[0061] The ring-shaped damper housing 7 has an outer circumferential housing surface 7f.

[0062] Furthermore, so-called lifting bores 14 are arranged around the circumference of the damper housing 7. These bores extend radially outwards within the damper housing 7 and are open to the outer surface 7f of the damper housing 7. The lifting bores 14 serve to attach lifting tools, e.g., a lifting harness. Preferably, two lifting bores 14 are arranged diametrically opposite each other around the circumference of the damper housing 7.

[0063] These lifting bores 14 can be arranged such that they are located in the center of gravity plane of the damping unit 6 or at a small axial distance from the center of gravity plane of the damping unit 6. This axial distance lies in a range of approximately one-third to one-seventh of the total axial width of the damper, i.e., the damping unit 6.

[0064] The at least one interface S comprises a recording 11 with a central axis 11 a.

[0065] In the example shown in Figure 3, eight interfaces S are distributed around the circumference, each with a corresponding receptacle 11. In this embodiment, the interfaces S are connected by, or formed into, an interface ring 10. It is also possible for only one interface S to be connected to a division that allows attachment to the damper housing 7. Here, the interface ring 10 is mounted coaxially to the axis of rotation 1a, which also forms a central axis of the damping unit 6, on the first end face 7b of the damper housing 7. The interface ring 10 is a separate component and is axially attached to the first end face 7b of the damper housing 7 by means of fastening elements 10a, e.g., screws.

[0066] The interface ring 10 is a metal ring and has a first ring end face 10b and an opposite second ring end face WC.

[0067] The interface ring 10 is centered on the damper housing 7 by an axial projection 13 and / or by axial pins (not shown here, but easily imaginable). The projection 13 is circumferential and extends axially from the first housing end face 7b of the damper housing 7.

[0068] In its assembled state, the interface ring 10 rests with its second ring face 10c flat against a circumferential support section 12 at the edge of the first housing face 7b of the damper housing 7. This support section 12 extends radially from the outer housing face 7f of the damper housing 7 towards the axis of rotation 1a to the projection 13 of the damper housing 7.

[0069] In this arrangement, a circumferential end region of an inner ring surface 10f contacts the projection 13 and is thus centered on the axis of rotation 1a and the damper housing 7. This end region of the inner ring surface 10f borders the second ring end face 10c.

[0070] The interface ring 10 is provided around its circumference with radial receptacles 11, which are open to the outside, i.e., to an outer ring surface 10e. In the example shown, the receptacles 11 are bores with a central axis 11a. Each of these receptacles 11 is designed to receive a section of a lever element.

[0071] In the area of ​​the interfaces S, a corresponding section 10d of the second ring end face 10c is additionally specified. For fastening the interface ring 10 to the damper housing 7, in addition to the fastening elements 10a and 9a shown, such as screws, other joining methods are also conceivable, such as:

[0072] • Welding

[0073] • Presses

[0074] • Shrinking

[0075] • Stick

[0076] The lever element is not shown here, but it is easy to imagine. In this example, it is a rod with a circular cross-section and a single end where it meets the wall.

[0077] The lever element is required during assembly, disassembly, and maintenance to rotate the entire damping unit 6 around the axis of rotation 1a, also referred to as the axis of rotation, and to bring it into the required angular position. For this purpose, the lever rod is inserted with its interface end into a receptacle 11 of the interface S of the interface ring 10 and pulled out again after use.

[0078] It is also conceivable that a bolt is used instead of the receptacles 11 of the interfaces S in the form of a bore. In this case, the interface end of the associated lever element is tubular in shape, corresponding to this bolt or to the shape of this bolt. For example, the lever element can be a tube.

[0079] Furthermore, it is possible that the cross-section of the recordings 11 of the interfaces S, including the cross-section of the interface end of the associated lever element, may be oval, square or polygonal or similarly designed.

[0080] The arrangement can be used, for example, in stationary or mobile installations, e.g., in vehicles, ships, etc.

[0081] The invention described above offers further advantages, such as…

[0082] Optimized use of construction space to maximize the available space for the

[0083] to achieve secondary mass (flywheel ring 8)

[0084] A weight-optimized design • A modular option for the interfaces S with the mounts 11, since a modular use for various dampers integrated into a flywheel (damping units 6) is conceivable.

[0085] • Dismantling of the associated lever elements in the installed state of the damping unit 6.

[0086] • At very low and / or high torsional vibration frequencies, the damping unit 6 still behaves like a flywheel.

[0087] • The mounting points 11 of the interfaces S can also be used for balancing the damping unit 6. • A cost advantage results because the damper and flywheel are combined in one component.

[0088] The invention is not limited by the embodiment described above with the variants described, but can be modified within the scope of the claims.

[0089] Reference symbol list

[0090] 1. Arrangement

[0091] 1a Rotary axis

[0092] 2 Drive unit

[0093] 3 working machine

[0094] 4 clutch

[0095] 5 wave

[0096] 6 damping unit

[0097] 7 damper housings

[0098] 7a Chamber of Labour

[0099] 7b, 7c Front of housing

[0100] 7d flange

[0101] 7e bore

[0102] 7f Case exterior

[0103] 8 Swing ring

[0104] 9 lids

[0105] 9a Lid fastening element

[0106] 9b Lid end

[0107] 9c Lid outside

[0108] 10 interface ring

[0109] 10a Fastening element

[0110] 10b, 10c Ring face

[0111] 10d Plant section

[0112] 10th ring outer side

[0113] 10f inner ring

[0114] 11th entry

[0115] 11a Central axis

[0116] 12th edition section

[0117] 13 lead

[0118] 14 Lifting borehole

[0119] S interface

Claims

Claims 1. Arrangement (1) which, together with a drive unit (2), a working machine (3) and a damping unit (6), forms a device for compressing gases and / or gas mixtures, in particular hydrogen, characterized in that the damping unit (6) is designed as a damper integrated in a flywheel.

2. Arrangement (1) according to claim 1, characterized in that the damping unit (6) is arranged on a common shaft (5) between the drive unit (2) and the working machine (3) in series with these in a rotationally fixed manner.

3. Arrangement (1) according to one of the preceding claims, characterized in that the drive unit (2) is designed as an electric motor.

4. Arrangement (1) according to claim 3, characterized in that the drive unit (2) is an asynchronous three-phase motor, synchronous motor, DC motor or the like.

5. Arrangement (1) according to one of the preceding claims, characterized in that the working machine (3) is a compressor designed as a piston compressor.

6. Arrangement (1) according to one of the preceding claims, characterized in that the damping unit (6) comprises a damper housing (7), a flywheel ring (8) which is rotatably arranged in a working chamber (7a) of the damper housing (7) about the axis of rotation (1a), and a cover (9) which closes the working chamber (7a), wherein at least one interface (S) which has a receptacle (11) for a removable lever element is attached laterally to an outer diameter of a housing end face (7b, 7c) of the damper housing (7).

7. Arrangement (1) according to claim 6, characterized in that the at least one interface (S) of the damping unit (6) is connected to an interface ring (10), wherein the interface ring (10) is attached to a Ge- The front face (7b, 7c) of the damper housing (7) is mounted coaxially to a rotation axis (1a) of the arrangement (1).

8. Arrangement (1 ) according to claim 6 or 7, characterized in that lifting bores (14) are arranged on the circumference of the damper housing (7) which extend radially outwards in the damper housing (7) and are open to an outer surface (7f) of the damper housing (7).

9. Arrangement (1 ) according to claim 8, characterized in that at least two lifting bores (14) are arranged diametrically on the circumference of the damper housing (7).

10. Arrangement (1) according to claim 8 or 9, characterized in that the lifting bores (14) are arranged such that they are located in the center of gravity plane of the damping unit (6) or at a small axial distance from the center of gravity plane of the damping unit (6), wherein this axial distance is in a range of about one third to one seventh of an axial total damper width, i.e. the total width of the damping unit (6).

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