DE102018204691A1 - Fluid distributor for fluid cooling of a hollow shaft - Google Patents

Abstract

The invention relates to a fluid distributor (1) for fluid cooling a hollow shaft (10) and a hollow shaft (10) equipped therewith, in particular a rotor shaft (10) for an electric machine (100), and an electric machine (100) equipped therewith. In a simple and thus assembly-friendly manner, the fluid distributor (1) can be mounted in that the fluid distributor (1) has a tubular base body (2) with an open end section (3), a closed end section (4) and an intermediate section (5) formed therebetween. wherein the open end section (3) for fastening the fluid distributor (1) to a fluid inlet (12) for introducing fluid into the hollow shaft (10) and the closed end section (4) for fastening the fluid distributor (1) to the hollow shaft ( 10) and wherein at least one fluid passage opening (6; 6a, 6b) is formed in the intermediate section (5).

Description

The invention relates to a fluid distributor for fluid cooling a hollow shaft according to the features of the preamble of claim 1 and a hollow shaft equipped therewith, in particular a rotor shaft for an electric machine, with the features of the preamble of claim 12 and an electric machine equipped therewith, in particular for a vehicle with the features of the preamble of claim 15.

It is known to cool hollow shafts, such as rotor shafts of electric machines, by flowing through the hollow shaft interior with a fluid, for example oil, and / or to lubricate.

From the DE 10 2014 107 845 A1 For example, a fluid distributor for fluid cooling a hollow shaft of a rotor of an electric machine is known. In this case, the hollow shaft has a, axially opening into a hollow shaft interior of the hollow shaft fluid inlet for introducing a fluid into the hollow shaft interior and fluid outlets in the form of radial passage openings in the hollow shaft for discharging the fluid from the hollow shaft interior. The fluid distributor is arranged in the hollow shaft interior and has a funnel-shaped base body with an open end portions with a small diameter and an open end portion with a large diameter. In this case, the open end portions with the small diameter is attached to the fluid inlet. The open end portion with the large diameter is arranged inside the hollow shaft interior and opens into it. The fluid is introduced through the fluid inlet and through the open end portion of small diameter in the interior of the funnel-shaped body and through the open end portion with the large diameter in a surrounding the fluid distributor region of the hollow shaft interior and through the fluid outlets in the hollow shaft from this again ausleitbar.

From the EP 0 430 854 B1 an oil distributor for lubricating the bearings of a hollow shaft is known, which has a tubular body with two open end portions.

From the DE 2 407 415 is a journal bearing for a propeller shaft known, the bearings are held by wedge strips in position. The wedge strips have radial passage openings for the supply of oil to the propeller shaft.

However, the known in the prior art fluid manifolds are not yet optimally formed. Thus, fluid distributors known from the prior art can usually only be positioned and / or mounted in a difficult manner and often only with the aid of a mounting aid. In addition, in fluid distributors known from the prior art, the position assurance, especially at high speeds of the hollow shaft, be technically demanding. In addition, hardly any targeted, locally guided fluid cooling can be ensured by fluid distributors known from the prior art.

The invention is therefore based on the object, the above-mentioned fluid distributor, such and further develop that this in a hollow shaft, for example, a rotor shaft of an electric machine is mounted in a simple and thus easy to assemble, and in particular a speed-fixed positioning and / or a targeted , locally guided fluid cooling allows.

The object underlying the invention is achieved for the fluid distributor with the features of patent claim 1 and for the hollow shaft with the features of claim 12 and for the electric machine with the features of claim 15.

In this case, the fluid distributor is designed in particular for the fluid cooling of a hollow shaft and / or at least one bearing for mounting the hollow shaft. For example, the fluid distributor can be designed for fluid cooling of a rotor shaft of an electric machine and / or at least one bearing for supporting a rotor shaft of an electric machine.

The fluid distributor has in particular a tubular base body. In this case, the tubular base body has an open end portion, a closed end portion and an intermediate portion formed therebetween. In this case, the open end section is designed in particular for fastening the fluid distributor to a fluid inlet for admitting fluid into the hollow shaft. The closed end portion is designed in particular for fastening the fluid distributor to the hollow shaft. In particular, at least one fluid passage opening, in particular in the form of a radial passage opening, is formed in the intermediate section.

A fluid distributor designed in this way can be mounted in a hollow shaft in a simple and thus assembly-friendly manner, for example without the aid of a mounting aid, which is equipped with a fluid inlet for introducing a fluid into a hollow shaft interior of the hollow shaft and with at least one fluid outlet for discharging the fluid out of the hollow shaft interior is.

Therefore, the invention also relates to a hollow shaft, in particular a rotor shaft for an electric machine, with fluid cooling, which has a fluid inlet for introducing a fluid into a Hollow shaft interior of the hollow shaft and at least one fluid outlet for discharging the fluid from the hollow shaft interior and in whose hollow shaft interior such a fluid distributor is arranged. The fluid inlet can in particular open axially, in particular with respect to the axis of rotation of the hollow shaft, into the hollow shaft interior. The at least one fluid outlet can be designed in particular as a passage opening with a substantially radial, for example radial, extent in the hollow shaft. In this case, a substantially radial extension can also be understood as meaning an oblique extent which extends essentially in the direction of the radius, relative to the axis of rotation of the hollow shaft. The open end section of the tubular base body of the fluid distributor can in particular be fastened or fastened to the fluid inlet. The closed end section of the tubular base body of the fluid distributor can in particular be fastened or fastened to, preferably in, the hollow shaft. The fluid can be introduced in particular through the fluid inlet into the interior of the tubular base body of the fluid distributor and through the at least one fluid passage opening of the intermediate section of the tubular base body of the fluid distributor into a region of the hollow shaft interior surrounding the fluid distributor and out of the region of the hollow shaft interior surrounding the fluid distributor by the at least a fluid outlet of the hollow shaft be divertible. The fluid may in particular be a coolant, for example oil. The fluid distributor can therefore be in particular a coolant distributor, for example an oil distributor, or the fluid cooling an oil cooling.

Moreover, the invention relates to a, in particular for a vehicle, for example, for a hybrid or electric vehicle, which has a rotor and a stator, wherein the rotor is rotatably mounted on a rotor shaft in the form of a hollow shaft, wherein the rotor shaft is such a hollow shaft.

By such a fluid distributor or such a hollow shaft, a targeted, locally guided fluid cooling can be realized. For example, by the position, configuration and number of the at least one fluid passage opening, the fluid flow can be directed locally. So the cooling can be optimized. This can be of particular interest in particular for rotor shafts of electric machines, in particular with high power densities and / or a compact and / or solid construction, since not only heat is generated by the shaft bearing, but also by the operation of the electric machine itself during operation thereof, which should be dissipated to ensure lossless operation of the electric machine.

A connection between an axial fluid inlet and a fluid manifold secured thereto across the open end portion of the tubular body may have high speed resistance due to the tubular configuration of the tubular body of the fluid manifold and axial positioning at the axial fluid inlet. This may be particularly of particular interest in hollow shafts with high speeds, such as rotor shafts of electric machines.

In one embodiment, the open end section for fastening the fluid distributor to the fluid inlet is designed by means of a snap connection or can be fastened or fastened to the fluid inlet by means of a snap connection. For example, the open end portion for attaching the fluid manifold to the fluid inlet may be configured by means of a snap ring connection or a snap hook connection or attachable or affixed to the fluid inlet by means of a snap ring connection or a snap hook connection. Thus, the fluid distributor can be attached to the fluid inlet in a simple and easy to install manner.

In a further embodiment, the closed end section is designed for fastening the fluid distributor by means of a fitting connection in the hollow shaft or can be fastened or fastened in the hollow shaft by means of a fitting connection. Thus, the fluid distributor can be mounted in a simple and easy to install manner in the hollow shaft.

In a further embodiment, the closed end section is designed to terminate and seal an axial hollow shaft opening of the hollow shaft or closes off an axial hollow shaft opening of the hollow shaft. In this case, the closed end section may in particular have a terminating section terminating an axial side of the tubular base body. Thus, the fluid distributor can additionally also have a plug function. An additional component for the completion and sealing of the axial hollow shaft opening, for example an additional slug, and its arrangement is no longer necessary. Thus, the production and assembly of the hollow shaft can be further improved.

In a further embodiment, the closed end section is provided with at least one seal for sealing between the closed end section and the hollow shaft, in particular an inner circumferential surface of the hollow shaft. Thus, in particular a fitting connection between the closed end portion and the hollow shaft can be sealed.

The tubular base body or the fluid distributor can in particular be rotationally symmetrical and / or rotationally symmetrical, in particular with respect to the axis of rotation of the hollow shaft, arranged in the hollow shaft interior. So a particularly high speed resistance can be achieved.

In a further embodiment, the tubular base body is designed substantially conical. In particular, the tubular base body can thereby taper from the closed end section to the open end section. Thus, an improved fluid delivery can be achieved.

The at least one fluid passage opening may in particular be a passage opening with an essentially radial, in particular radial, extension.

The at least one fluid passage opening may in particular be formed adjacent to the closed end section. Thus, the longest possible fluid path and thus improved cooling can be achieved.

The at least one fluid passage opening can be designed, for example, with a circular cross-section and / or with an ovaloid cross-section, for example as a slot, and / or with a different cross-sectional shape. Due to the design of the at least one fluid passage opening, the fluid cooling can be performed locally targeted.

In particular, a plurality of fluid passage openings may be formed in the intermediate section. Thus, the fluid cooling can be even better targeted locally.

In a further embodiment, at least one series of two or more circumferentially distributed fluid passage openings is formed in the intermediate section. For example, at least two series of two or more circumferentially distributed fluid passage openings may be formed in the intermediate section. Thus, an improved targeted local leadership of the fluid cooling can be achieved. The at least one series of fluid passage openings, for example the at least two fluid passage opening series, may in particular be formed adjacent to the closed end section. For example, the fluid passage openings of different fluid passage opening series may be both the same and different from each other.

In the embodiment of the fluid passage openings, a large variety of geometries can be realized. In this case, the fluid line and / or fluid delivery by the number, the arrangement, the training, for example, the cross-sectional shape, and / or the size of the fluid passage opening can be tailored to the particular application area and the type of hollow shaft.

In a further embodiment, wing elements for fluid conduction, in particular through the hollow shaft interior, and / or for fluid delivery, in particular through the hollow shaft interior, and / or for positioning, in particular centering, of the fluid distributor in the hollow shaft are formed on the outer surface of the intermediate section. Thus, the fluid cooling can even better targeted locally out and / or further improves the fluid delivery and / or further simplifies the assembly of the fluid distributor in the hollow shaft, reduced assembly errors and high positional fidelity can be achieved.

For fluid delivery, the geometry of the wing elements can be designed in particular flow-oriented. For example, at least a part of the wing elements may be configured in the manner of a turbine or a propeller.

For positioning, in particular centering, of the fluid distributor in the hollow shaft, the vane elements of the fluid distributor can in particular be supported against the inner circumferential surface of the hollow shaft and position the fluid distributor in the hollow shaft, in particular centering.

In particular, the wing elements for positioning, in particular centering, of the fluid distributor in the hollow shaft spanning or aufspannbar or be designed unfolding or hinged. This can for example be realized in that the wing elements are designed such that they are deformable, in particular elastic, designed and in the unmounted state have an outer diameter which is greater than the inner diameter of the hollow shaft. During assembly, the wing elements are then pressed against the inner circumferential surface of the hollow shaft, which deform the wing elements and position the tubular body or the fluid manifold in the hollow shaft and in particular can center. For example, the wing elements may be configured such that they extend obliquely from the outer surface of the intermediate section of the tubular base body to the inner circumferential surface of the hollow shaft and / or to the outer surface of the intermediate section of the tubular base body. In this case, the wing elements may extend obliquely outwards, in particular from the open end section to the closed end section. When inserting the open end portion into the hollow shaft, wing members configured in this way can be used against the inner surface of the shell Hollow shaft are pressed and bend on the tubular body, in particular without acting decisively counteract the insertion force.

The wing elements may, for example, have a substantially continuous material thickness. However, it is also possible, for example, to taper the wing elements radially outwardly and / or to form them with a radially outwardly decreasing material thickness.

The wing elements may for example be straight. However, it is also possible, for example, bent the wing elements, for example, turbine-like or propeller-like to design.

In the design of the wing elements, a large variety of geometries can be realized. In this case, the fluid line and / or fluid delivery and / or positioning, in particular centering, by the number, the arrangement, the length, the geometry and / or the installation angle of the wing elements can be tailored to the particular application area and the type of hollow shaft.

In a further embodiment, at least one series of two or more, circumferentially distributed wing elements and / or at least one row of two or more, axially distributed wing elements is formed on the outer surface of the intermediate portion. In particular, two or more, for example three or four or five series, of two or more, circumferentially distributed wing elements and / or two or more rows of two or more, axially distributed wing elements may be formed on the outer surface of the intermediate section. Thus, the fluid line and / or fluid delivery and / or positioning, in particular centering, can be optimized by the wing elements.

In a further embodiment, the fluid distributor is made of plastic. Thus, the fluid distributor can be manufactured in a simple and cost-effective manner.

In a further embodiment, the open end portion and / or the intermediate portion and / or the closed end portion is provided with stabilizing ribs. Thus, the mechanical stability of the fluid distributor can be optimized. An embodiment of the fluid distributor with stabilizing ribs can be advantageous and easy to implement, in particular in one embodiment of the plastic fluid distributor.

For example, stabilizing ribs may be formed on the outer surface of the open end portion and / or the intermediate portion which are circumferentially distributed and extend in the axial direction of the tubular body.

For example, the outer surface of the launching section may be provided with stabilizing ribs, for example in the form of a cross.

The aforementioned disadvantages are therefore avoided and corresponding advantages are achieved.

• 1 in einem schematischen Querschnittsausschnitt eine Ausführungsform einer erfindungsgemäßen Elektromaschine mit einer Ausführungsform einer erfindungsgemäßen Hohlwelle als Rotorwelle und mit einer Ausführungsform eines erfindungsgemäßen Fluidverteilers mit einem rohrförmigen Grundkörper mit einem offenen Endabschnitt, einem geschlossenen Endabschnitt und einem dazwischen liegenden Zwischenabschnitt mit einer Serie aus umfänglich verteilten Fluiddurchlassöffnungen;
• 2 in einem vergrößerten, schematischen Querschnittsausschnitt die in 1 gezeigte Ausführungsform einer erfindungsgemäßen Hohlwelle und eines erfindungsgemäßen Fluidverteilers;
• 3 in einem weiter vergrößerten, schematischen Querschnittsausschnitt den offenen Endabschnitt der in 1 gezeigten Ausführungsform eines erfindungsgemäßen Fluidverteilers;
• 4 in einem weiter vergrößerten, schematischen Ausschnitt den geschlossenen Endabschnitt der in 1 gezeigten Ausführungsform eines erfindungsgemäßen Fluidverteilers;
• 5 in einem schematischen Querschnittsausschnitt eine Ausführungsform einer erfindungsgemäßen Elektromaschine mit einer Ausführungsform einer erfindungsgemäßen Hohlwelle als Rotorwelle und mit einer Ausführungsform eines erfindungsgemäßen Fluidverteilers mit einem rohrförmigen Grundkörper mit einem offenen Endabschnitt, einem geschlossenen Endabschnitt und einem dazwischen liegenden Zwischenabschnitt mit zwei Serien aus umfänglich verteilten Fluiddurchlassöffnungen und mit Flügelelementen;
• 6-9 in schematischen, teils perspektivischen Ansichten die in 5 gezeigte Ausführungsform eines erfindungsgemäßen Fluidverteilers;
• 10-14 in schematischen Schnittansichten weitere Ausführungsformen eines erfindungsgemäßen Fluidverteilers mit unterschiedlichen Flügelelementen und/oder Fluiddurchlassöffnungen;
• 15-17 in schematischen, teils perspektivischen Ansichten eine weitere Ausführungsform eines erfindungsgemäßen Fluidverteilers mit einem mit Stabilisierungsrippen ausgestatteten offenen Endabschnitt und Zwischenabschnitt; und
• 18-23 in schematischen, teils perspektivischen Ansichten weitere Ausführungsformen eines erfindungsgemäßen Fluidverteilers mit unterschiedlich ausgestaltetem geschlossen Endabschnitt ohne/mit Dichtung und/oder ohne/mit Stabilisierungsri ppen.

There are now a variety of ways to design the fluid distributor according to the invention, the hollow shaft according to the invention and the electric machine according to the invention in an advantageous manner and further. For this, reference may firstly be made to the patent claims 1 and 12 subordinate claims or to claim 15. In the following, some preferred embodiment of the fluid distributor according to the invention, the hollow shaft according to the invention and the electric machine according to the invention are explained in more detail with reference to the drawing and the associated description. In the drawing shows:

• 1 in a schematic cross-sectional detail of an embodiment of an electric machine according to the invention with an embodiment of a hollow shaft according to the invention as a rotor shaft and with an embodiment of a fluid distributor according to the invention with a tubular body having an open end portion, a closed end portion and an intermediate intermediate portion with a series of circumferentially distributed fluid passage openings;
• 2 in an enlarged, schematic cross section section in 1 shown embodiment of a hollow shaft according to the invention and a fluid distributor according to the invention;
• 3 in a further enlarged, schematic cross-sectional detail of the open end of the in 1 shown embodiment of a fluid distributor according to the invention;
• 4 in a further enlarged, schematic section of the closed end portion of in 1 shown embodiment of a fluid distributor according to the invention;
• 5 in a schematic cross-sectional detail of an embodiment of an electric machine according to the invention with an embodiment of a hollow shaft according to the invention as rotor shaft and with an embodiment of a fluid distributor according to the invention with a tubular body with an open end portion, a closed end portion and an intermediate intermediate portion with two series of circumferentially distributed fluid passage openings and with wing elements;
• 6-9 in schematic, partly perspective views the in 5 shown embodiment of a fluid distributor according to the invention;
• 10-14 in schematic sectional views of further embodiments of a fluid distributor according to the invention with different wing elements and / or fluid passage openings;
• 15-17 in schematic, partly perspective views of another embodiment of a fluid distributor according to the invention with an equipped with stabilizing ribs open end portion and intermediate portion; and
• 18-23 in schematic, partly perspective views further embodiments of a fluid distributor according to the invention with differently ausgestaltetem closed end section without / with seal and / or penny with / without stabilization.

The 1 to 23 show different embodiments of a fluid distributor according to the invention 1 , For example, an oil distributor, for fluid cooling.

The 1 and 5 illustrate that such designed fluid distributor 1 in particular for fluid cooling of a hollow shaft 10 and / or of hollow shaft bearings 11 . 11 ' and in particular for fluid cooling of a rotor shaft 10 an electric machine 100 and / or rotor shaft bearings 11 . 11 ' can be used.

The 1 and 5 show different embodiments of an electric machine 100 , in particular for a vehicle, which has a rotor 101 with a laminated core 101 ' and a stator 102 includes. Here are the laminated cores 101 ' of the rotor 101 For example, by shrinking, on a rotor shaft in the form of a hollow shaft 10 fastened, which on both sides by two rotor shaft bearings 11 . 11 ' is rotatably mounted. The hollow shaft 10 is equipped with a fluid cooling system. Here is the hollow shaft 10 with a fluid inlet 12 , For example, with a Ölleitteil, for introducing a fluid F in a hollow shaft interior H the hollow shaft 10 equipped, which axially in the direction of the axis of rotation R the hollow shaft 10 in the hollow shaft interior H empties. In the hollow shaft 10 are fluid outlets 13 for draining the fluid F from the hollow shaft interior H trained, which ( 13 ) as passage openings with a substantially radial extent in the hollow shaft 10 are formed. The 1 and 5 illustrate that as fluid outlets 13 serving through openings have an oblique extent, which is substantially in the direction of the radius, relative to the axis of rotation R the hollow shaft 10 , extend.

As part of the 1 and 5 are in the hollow shaft interior H different embodiments of a fluid distributor according to the invention 1 arranged. The show 2 to 4 schematic views of in 1 shown embodiment of a fluid distributor according to the invention 1 and the 6 to 9 schematic views of in 5 shown embodiment of a fluid distributor according to the invention 1 ,

The 1 to 4 and 5 to 9 show that the fluid distributor 1 a tubular body 2 , for example made of plastic, with an open end section 3 , with a closed end section 4 and with an intermediate section formed therebetween 5 having. Here is the tubular body 2 is substantially conical and tapers from the closed end portion 4 to the open end section 3 out. The open end section 3 is to attach the fluid distributor 1 at the fluid inlet 12 and at this (12) by a snap connection 3 ' attached. The closed end section 4 is to attach the fluid distributor 1 on the hollow shaft 10 and for completing and sealing an axial hollow shaft opening of the hollow shaft 10 designed. In this case, the closed end section 4 one, an axial side of the tubular body 2 final graduation section 4 ' on and is with a seal 7 , for example in the form of two in gaskets 7 ' received sealing rings, equipped. By means of a fitting connection is the closed end portion 4 of the tubular base body 2 in the hollow shaft 10 attached.

The 1 to 4 and 5 to 9 show that in the intermediate section 5 adjacent to the closed end portion 4 Fluid ports 6 are formed.

In the in the 1 to 4 The embodiment shown here are the fluid passage openings 6 in the form of a series 6a of four, circumferentially distributed fluid passage openings 6 designed with a circular cross-section.

In the in the 5 to 9 In contrast, the embodiment shown, the fluid passage openings 6 in the form of two series 6a , 6b each consist of four, circumferentially distributed fluid passage openings 6 designed. In this case, the fluid passage openings 6 the different Fluiddurchlassöffnungsserien 6a 6b show different cross sections. So are the fluid ports 6 the, the closed end section 4 nearest fluid passage port series 6a each in the form of a long hole whereas the fluid ports are configured 6 the other fluid passage opening series 6b have a circular cross-section.

In the 1 and 5 the fluid path, for example oil path, is illustrated by arrows. This illustrate the 1 and 5 that the fluid F through the fluid inlet 12 in the interior I of the tubular base body 2 of the fluid distributor 1 and through the fluid passage openings 6 of the intermediate section 5 of the tubular base body 2 of the fluid distributor 1 in a the fluid distributor 1 surrounding area of the hollow shaft interior H can be introduced and from the fluid distributor 1 surrounding area of the hollow shaft interior H through the fluid outlets 13 in the hollow shaft 10 is derivable.

In the in the 5 to 9 shown embodiment are additionally on the outer surface of the intermediate portion 5 of the tubular base body 2 of the fluid distributor 1 wing elements 8th to the fluid line and for fluid delivery through the hollow shaft interior H as well as for positioning, in particular centering, of the fluid distributor 1 in the hollow shaft 10 educated. Here are the wing elements 8th spanning or aufspannbar or unfolding or hinged designed and support the wing elements 8th of the fluid distributor against the inner circumferential surface of the hollow shaft 10 from. In this way, the wing elements 8th not only as a fluid-conducting or leading contour, but in particular also for positioning and centering of the fluid distributor 1 in the hollow shaft 10 serve. Here are the wing elements 8th designed so that this ( 8th ) starting from the outer surface of the intermediate section 5 of the tubular base body 1 obliquely to the inner surface of the hollow shaft 10 and the outer surface of the intermediate section 5 of the tubular base body 2 extend. In particular, the wing elements extend 8th from the open end section 3 to the closed end section 4 outwards diagonally. When inserting the open end section 2 in the hollow shaft 10 can the wing elements 8th against the inner circumferential surface of the hollow shaft 10 pressed and in the direction of the tubular body 1 be bent, the fluid distributor 1 in the hollow shaft 10 was positioned and centered.

In the in the 5 to 9 shown embodiment are on the outer surface of the intermediate portion 5 five series of four circumferentially distributed wing elements 8th or four rows of five axially distributed wing elements 8th educated. Here are the wing elements 8th at a set-up angle from the outer surface of the intermediate section 5 of the tubular base body 2 and have a substantially continuous material thickness.

The 10 to 14 illustrate that in the design of the fluid passage openings 6 and / or the wing elements 8th a large variety of geometries can be realized by which the fluid line and / or fluid delivery and / or positioning, in particular centering, for example, the number, the arrangement, the configuration and the size of the fluid passage openings 6 and / or by the number, the arrangement, the length, the geometry and / or the installation angle of the wing elements 8th can be tailored to the particular application and the type of hollow shaft.

In the in 10 shown embodiment are on the outer surface of the intermediate portion 5 five series 8a . 8b . 8c . 8d . 8e from four circumferentially distributed wing elements or four rows 8A . 8B . 8C . 8D from five axially distributed wing elements 8th educated. The fluid passage openings 6 are there - analogous to the in the 5 to 9 shown embodiment - in the form of two series 6a , 6b each consist of four, circumferentially distributed fluid passage openings 6 designed with different cross sections (slot / circular).

In the in the 11 and 12 Embodiments shown are on the outer surface of the intermediate portion 5 three series 8a . 8b . 8c from four circumferentially distributed wing elements or four rows 8A . 8B . 8C . 8D from three axially distributed wing elements 8th educated. Here are the differences in the 11 and 12 shown embodiments by the installation angle of the wing elements 8th from each other. The fluid passage openings 6 are in the in the 11 and 12 shown embodiments - analogous to that in the 1 to 4 shown embodiment - in the form of a series 6a of four, circumferentially distributed fluid passage openings 6 designed with a circular cross-section.

In the in 13 shown embodiment, the wing elements 8th - analogous to those in the 5 to 12 shown embodiments - a substantially continuous material thickness.

In the in 14 As shown, the wing elements are tapered 8th however, radially outward, with their material thickness decreases radially outward.

The 15 to 17 show that in a further embodiment of the open end portion 3 and the intermediate section 5 with stabilizing ribs 9 Is provided. Here are the stabilizing ribs 9 on the outer surface of the open end portion 3 and the intermediate section 5 arranged distributed circumferentially and in the axial direction of the tubular body 1 formed extending.

In the in 18 shown embodiment is the closed end portion 3 designed seal-free. Optionally, depending on the formation of the tubular body 2 material used no seal may be necessary.

In the in 19 shown embodiment is the closed end portion 3 however, with a seal 7 , fitted.

In the in the 20 and 21 shown embodiment is the closed end portion 3 with a seal 7 equipped, being on the outer surface of the closing section 4 ' stabilizing ribs 9 ' , in particular in the form of a cross, are formed.

In the in the 22 and 23 shown embodiment is the closed end portion 3 with a seal 7 equipped, the outer surface of the end section 4 ' is formed stabilizing rib free.

LIST OF REFERENCE NUMBERS

1

fluid distributor

2

tubular body

3

open end portion of the tubular body

3 '

Snap connection of the open end section

4

closed end portion of the tubular body

4 '

End portion of the closed end portion

5

Intermediate portion of the tubular body

6

Fluid passage opening

6a, 6b

Series of circumferentially distributed fluid passage openings

7

poetry

7 '

seal Housing

8th

wing element

8a-8e

Series of circumferentially distributed wing elements

8A-8D

Row of axially distributed wing elements

9

Stabilizing ribs of the open end section and intermediate section

9 '

Stabilizing ribs of the end portion of the closed end portion

10

Hollow shaft / rotor shaft

11.11 '

Rotor shaft bearing

12

fluid inlet

13

fluid outlet

100

electric machine

101

rotor

101 '

laminated cores

102

stator

H

Hollow shaft interior

I

Interior of the tubular body of the fluid distributor

F

fluid

R

Rotation axis of the hollow shaft

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102014107845 A1 [0003]
• EP 0430854 B1 [0004]
• DE 2407415 [0005]

Claims (15)

Fluid distributor (1) for fluid cooling a hollow shaft (10) and / or at least one bearing (11,11 ') for supporting the hollow shaft (10), in particular for fluid cooling a rotor shaft (10) of an electric machine (100) and / or at least one bearing (11,11 ') for supporting a rotor shaft (10) of an electric machine (100), characterized in that the fluid distributor (1) comprises a tubular base body (2), wherein the tubular base body (2) has an open end portion (3), a closed end section (4) and an intermediate section (5) formed therebetween, the open end section (3) being adapted for attachment of the fluid distributor (1) to a fluid inlet (12) for introducing fluid into the hollow shaft (10) the closed end section (4) is designed to fasten the fluid distributor (1) to the hollow shaft (10), and at least one fluid passage opening (6; 6a, 6b) is formed in the intermediate section (5). Fluid distributor (1) after Claim 1 , characterized in that the open end portion (3) for fixing the fluid distributor (1) to a fluid inlet (12) by means of a snap connection (3 ') is designed. Fluid distributor (1) after Claim 1 or 2 , characterized in that the closed end portion (4) for fixing the fluid distributor (1) by means of a fitting connection in the hollow shaft (10) is designed. Fluid distributor (1) according to one of the preceding claims, characterized in that the closed end section (4) is designed to close and seal an axial hollow shaft opening of the hollow shaft (10). Fluid distributor (1) according to one of the preceding claims, characterized in that the closed end section (4) is equipped with at least one seal (7) for sealing between the closed end section (4) and the hollow shaft (10). Fluid distributor (1) according to one of the preceding claims, characterized in that the tubular base body (2) tapers from the closed end section (4) to the open end section (3). Fluid distributor (1) according to one of the preceding claims, characterized in that in the intermediate section (5) at least one series (6a, 6b) of two or more circumferentially distributed fluid passage openings (6) is formed. Fluid distributor (1) according to any one of the preceding claims, characterized in that on the outer surface of the intermediate portion (5) wing elements (8) for fluid line and / or fluid delivery and / or positioning, in particular centering, of the fluid distributor (1) in the hollow shaft (10) are formed. Fluid distributor (1) according to one of the preceding claims, characterized in that on the outer surface of the intermediate portion (5) at least one series (8a, 8b, 8c, 8d, 8e) of two or more circumferentially distributed wing elements (8) and / or at least a row (8A, 8B, 8C, 8D) is formed of two or more axially distributed wing members (8). Fluid distributor (1) according to one of the preceding claims, characterized in that the fluid distributor (1) is formed from plastic. Fluid distributor (1) according to one of the preceding claims, characterized in that the open end portion (3) and / or the intermediate portion (5) and / or the closed end portion (4) with stabilizing ribs (9, 9 ') is provided, in particular on the outer surface of the open end portion (3) and / or the intermediate portion (5) stabilizing ribs (9) are formed, which are arranged distributed circumferentially and extending in the axial direction of the tubular base body (2), and / or wherein the closed end portion ( 4) has an end section (4 ') which terminates an axial side of the tubular basic body (2) and whose (4') outer surface is provided with stabilizing ribs (9 '). Hollow shaft (10), in particular rotor shaft (10) for an electric machine (100), with fluid cooling, wherein the hollow shaft (10) has a fluid inlet (12) for introducing a fluid (F) into a hollow shaft interior (H) of the hollow shaft (10) and at least one fluid outlet (13) for discharging the fluid (F) from the hollow shaft interior (H), characterized in that in the hollow shaft interior (H) a fluid distributor (1) according to one of Claims 1 to 11 is arranged. Hollow shaft (10) to Claim 12 , characterized in that the fluid inlet (12) opens axially into the hollow shaft interior (H), wherein the at least one fluid outlet (13) is formed as a passage opening with a substantially radial extent in the hollow shaft (10), wherein the open end portion (3 ) of the tubular base body (2) of the fluid distributor (1) to the fluid inlet (12) is fastened or fastened, wherein the closed end portion (4) of the tubular base body (2) of the fluid distributor (1), in particular in, the hollow shaft (10 ) is fastened or fastened, wherein the fluid (F) through the fluid inlet (12) into the interior (I) of the tubular base body (2) of the fluid distributor (1) and through the at least one fluid passage opening (6; 6a, 6b) of the intermediate section (5) of the tubular base body (2) of the fluid distributor (1) into a region of the hollow shaft interior (H) surrounding the fluid distributor (1) and from the region of the hollow shaft interior (H) surrounding the fluid distributor (1) can be diverted through the at least one fluid outlet (13) of the hollow shaft (10) , Hollow shaft (10) according to one of the preceding claims, characterized in that the wing elements (8) of the fluid distributor (1) are supported against the inner circumferential surface of the hollow shaft (10) and in particular center the fluid distributor (1) in the hollow shaft (10). Electric machine (100), in particular for a vehicle, with a rotor (101) and a stator (102), wherein the rotor (101) is rotatably mounted on a rotor shaft (10) in the form of a hollow shaft, characterized in that the rotor shaft ( 10) a hollow shaft according to one of Claims 12 to 14 is.

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