ROTOR OF AN ELECTRIC ROTATING MACHINE, AND ELECTRIC ROTATING MACHINE

Abstract

A rotor has an iron core with rotor laminations which are arranged in at least one stack, plane-parallel to one another. At least one of the rotor laminations is designed as a fluid-conducting lamination and forms at least one flow channel having at least one radial direction component, which flow channel is open on at least one axial side of the fluid-conducting lamination. A rotor lamination is designed as a sealing lamination being arranged on the axially open side of the fluid-conducting lamination, by means of which rotor lamination designed as a sealing lamination the flow channel of the fluid-conducting lamination is sealed substantially fluid-tight on the side of the sealing lamination.

Claims

1. A rotor of an electric rotating machine, comprising an iron core with rotor laminations which are arranged in at least one stack, plane-parallel to one another, at least one of the rotor laminations being designed as a fluid-conducting lamination and forming at least one flow channel having at least one radial direction component, wherein the at least one flow channel is open on at least one axial side of the fluid-conducting lamination, and at least one of the rotor laminations is designed as a sealing lamination arranged on the axially open side of the fluid-conducting lamination, by means of which the flow channel of the fluid-conducting lamination is sealed substantially fluid-tight on side of the sealing lamination.

2. The rotor according to claim 1, wherein the fluid-conducting lamination is formed of a same material as other rotor laminations of the iron core.

3. The rotor according to claim 1, wherein the sealing lamination is formed of a same material as other rotor laminations of the iron core.

4. The rotor according to claim 1, wherein the flow channel of the fluid-conducting lamination is open axially on both sides and the sealing lamination is, in each case, arranged axially on both sides of the fluid-conducting lamination, by means of which the flow channel of the fluid-conducting lamination is sealed substantially fluid-tight on the side of the sealing lamination.

5. The rotor according to claim 1, wherein a plurality of fluid-conducting laminations are arranged directly adjacent to one another in a stack arrangement in a group of fluid-conducting laminations, so that they form a common flow channel, a sealing lamination being, in each case, arranged axially on both sides of the group of fluid-conducting laminations for axial sealing of the common flow channel.

6. The rotor according to claim 1, wherein the fluid-conducting lamination has a recess in a central region thereof for receiving a rotor shaft, the flow channel opening on a radially inner side of the fluid-conducting lamination.

7. The rotor according to claim 1, wherein the sealing lamination has a recess in a central region thereof for receiving a rotor shaft, a contour of the recess of the sealing lamination being designed to form a torque transmission acting in a form-fitting manner to a shaft that passes through the recess.

8. The rotor according to claim 1, wherein the flow channel in the fluid-conducting lamination leads to an axial outlet from which fluid conducted with the flow channel can be output axially out of the fluid-conducting lamination.

9. The rotor according to claim 1, wherein the rotor laminations form at least one axial flow channel which in a direction of longitudinal extent thereof runs parallel to an axis of rotation of the rotor and is fluidically connected to a respective flow channel of a respective fluid-conducting lamination.

10. An electric rotating machine, comprising: an iron core having rotor laminations arranged in at least one stack plane, plane-parallel to one another, wherein: at least one of the rotor laminations is a fluid-conducting lamination that forms at least one flow channel, the at least one flow channel being open on at least one axial side of the fluid-conducting lamination; and at least one of the rotor laminations is a sealing lamination arranged on the axially open side of the fluid-conducting lamination, the flow channel of the fluid-conducting lamination being sealed substantially fluid-tight on a side of the sealing lamination via the sealing lamination.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The disclosure described above is explained in detail below against the concerned technical background with reference to the accompanying drawings, which show preferred embodiments. The disclosure is in no way limited by the purely schematic drawings, wherein it is noted that the exemplary embodiments shown in the drawings are not limited to the dimensions shown. In the figures:

[0047] FIG. 1: shows a rotor according to the disclosure in a side view (upper partial representation) and in a sectional view (lower partial representation),

[0048] FIG. 2: shows a rotor lamination of the rotor,

[0049] FIG. 3: shows a fluid-conducting lamination of the rotor,

[0050] FIG. 4: shows a sealing lamination of the rotor, and

[0051] FIG. 5: shows a detail from a sectional view of the rotor according to the disclosure.

DETAILED DESCRIPTION

[0052] As can be seen from FIG. 1, the rotor 1 comprises multiple rotor laminations 20 which are arranged to be parallel to one another and which are arranged in a stack arrangement 10 on a common axis of rotation 2.

[0053] The view shown below the axis of rotation 2 shows that the rotor laminations 20 together form an axial flow channel 12. Within the stack arrangement 10, which can also be referred to as a stack, conventional rotor laminations 20 are arranged, as well as at least one fluid-conducting lamination 30, which is axially sealed by a sealing lamination 50.

[0054] The stack arrangement 10 is essentially or predominantly formed by rotor laminations 20, as illustrated in FIG. 2. In this case, FIG. 2 represents what is termed a further rotor lamination, which forms the predominant part of the laminated core.

[0055] These further rotor laminations 20 comprise multiple pockets 21 on the respective radial outer side thereof for the form-fitting arrangement of magnets to form a respective rotor. In the radially central region, a respective rotor lamination 20 has essentially triangular cutouts 22 distributed regularly on the circumference, which serve in particular to reduce mass and thus also to reduce the mass moment of inertia of the laminated core formed therewith. In the radially central region, the rotor lamination 20 has a recess 23 that is essentially circular in this case. Furthermore, the rotor lamination 20 has two radially inwardly extending lugs 24 which are designed to engage in a complementarily designed groove of a rotor shaft, not shown here.

[0056] FIG. 3 shows a fluid-conducting lamination 30. This fluid-conducting lamination 30 comprises multiple flow channels 40 which form openings 41 on the radial inner side of the fluid-conducting lamination 30. These serve to introduce cooling fluid which is conducted in a shaft guide of a rotor shaft, not shown here, that is led through the recess 23, into the flow channels 40. A respective flow channel 40 also has branches 43 in the embodiment shown here, so that a first sub-channel 44 and a second sub-channel 45 connect to a section of the concerned flow channel 40 starting from an opening 41 and the flow channel 40 as a whole has essentially a Y-shape. The two sub-channels 44, 45 each end in an axial outlet 42, which is designed here as a window and is positioned radially relatively far outside on the fluid-conducting lamination 30. In the embodiment shown here, these axial outlets 42 are in the immediate vicinity of the pockets 21, which serve to receive the magnets of the rotor. Correspondingly, cooling fluid can be conducted from a central shaft via the openings 41 into the flow channels 40 and from there to the axial outlets 42, wherein the axial outlets 42 are components of the axial flow channel 12 indicated in FIG. 1 or are fluidically connected to this axial flow channel 12.

[0057] In the embodiment shown here, a respective flow channel 40 is designed as a recess axially passing through the fluid-conducting lamination 30.

[0058] The fluid-conducting lamination 30 is accordingly a specially designed rotor lamination 20 and is preferably made of the same material as the remaining or further rotor laminations 20 of the stack arrangement 10. Accordingly, it is provided that the fluid-conducting lamination 30 is also made from a magnetizable material.

[0059] To ensure that cooling fluid in the flow channel 40 is conducted through the sub-channels 44, 45 only in the radial direction or with a radial component, sealing laminations 50 are provided to cover a respective flow channel 40. Such a sealing lamination 50 is shown in FIG. 4. It can be seen that this sealing lamination 50 also has pockets 21 for receiving the magnets of the rotor. It can also be seen that the sealing lamination 50 is closed in the radial regions in which the flow channels 40 are formed in the fluid-conducting lamination 30. This ensures that when the sealing lamination 50 rests on one side of the fluid-conducting lamination 30, the concerned flow channel 40 is closed in a fluid-tight manner on this side in the axial direction, in particular when there is an axially acting contact pressure force from the concerned sealing lamination 50 on the fluid-conducting lamination 30.

[0060] The fluid-conducting lamination 30 and also the sealing lamination 50 also have lugs 24 on the radially inner contours thereof, wherein the lugs 24 on the sealing lamination 50 serve to transmit torque to the shaft from the sealing lamination, which also acts as a rotor lamination. The lugs 24 on the fluid-conducting lamination 30 mainly serve to carry along the fluid-conducting lamination 30 in the rotary movement of the shaft.

[0061] However, the disclosure is not restricted to a sealing lamination 50, in each case, being arranged axially on both sides of a fluid-conducting lamination 30. Deviating therefrom, it can also be provided that—as shown in FIG. 5—multiple fluid-conducting laminations 30 form a group 11 of fluid-conducting laminations 30, wherein the fluid-conducting laminations 30 rest directly against one another here. In this case, only the axial outer sides of this group 11 of fluid-conducting laminations 30 are covered by sealing laminations 50.

[0062] Both the rotor lamination 20 and the sealing lamination 50 have windows 60 at the radial positions and angular positions of the axial outlets 42 of the fluid-conducting lamination 30, so that in a direct side-by-side arrangement of all rotor laminations 20, which also include the fluid-conducting lamination 30 and a respective sealing lamination 50, these windows 60 form the axial flow channel 12 together with the axial outlets 42.

[0063] A reliable and targeted cooling of the magnets also in an axially central region can be achieved with the rotor proposed here with a very compact axial design on the whole.

LIST OF REFERENCE SYMBOLS

[0064] 1 Rotor

[0065] 2 Axis of rotation

[0066] 10 Stack arrangement

[0067] 11 Group of fluid-conducting laminations

[0068] 12 Axial flow channel

[0069] 20 Rotor lamination

[0070] 21 Pocket

[0071] 22 Cutout

[0072] 23 Recess

[0073] 24 Lug

[0074] 30 Fluid-conducting lamination

[0075] 40 Flow channel

[0076] 41 Opening

[0077] 42 Axial outlet

[0078] 43 Branch

[0079] 44 First sub-channel

[0080] 45 Second sub-channel

[0081] 50 Sealing lamination

[0082] 60 Windows of the axial flow channel