DE102015210772A1 - Generator system for rail vehicles - Google Patents

Abstract

Generating system (1) for rail vehicles, comprising a generator (2) with a rotor (15) and a stator (16), and a wheelset bearing unit (3), wherein the wheelset bearing unit (3) has a bearing (4) for supporting a wheelset shaft (5 ) and a bearing housing (12), wherein on the front side of the axle (5) an end cap (13) is arranged and the end cap (13) is coupled to the rotor (15), and wherein the stator (16) with the bearing housing (12), wherein the rotor (15) has two sections (I, II), wherein the first section (I) is enclosed radially by the stator (16).

Description

The invention relates to a generator system for rail vehicles, comprising a generator with a rotor and a stator, and a Radsatzlagereinheit, wherein the Radsatzlagereinheit comprises a bearing for supporting a Radsatzwelle and a bearing housing, wherein on the front side of the wheelset an end cap is arranged and the end cap with is coupled to the rotor, and wherein the stator is connected to the bearing housing.

In the DE 10 2006 035 703 A1 a device for monitoring at least one operating variable of a wheel bearing is disclosed, wherein the device comprises a sensor, a transmitting unit and a power supply unit. The power supply unit consists of a co-rotating generator element and a generator element arranged on the wheel bearing housing and supplies the sensor and the transmission unit with energy.

Furthermore, in the document AT 507 382 B1 a wheel set bearing housing for a rail vehicle with a position detection device, which is supplied by means of a power supply unit with electrical energy disclosed. The power supply unit comprises an electric generator with a rotor and a stator, wherein the rotor can be driven by a wheelset shaft rotatably mounted in the wheelset bearing housing. The stator is mounted on the inside of a cover of the axlebox housing.

Object of the present invention is to disclose a cost-effective and simple generator system for rail vehicles, which can be easily retrofitted to any existing wheelset bearing units without much design effort.

To achieve the object of the invention specified in claim 1 generator system is proposed. Optional advantageous embodiments of the invention arise wholly or partly from the dependent claims.

The generator system according to the invention is characterized in that the rotor has two sections, wherein the first section is enclosed radially by the stator. The first section of the rotor has a smaller outer diameter compared to the second section. Preferably, the second portion of the rotor is formed as a flange. In engineering, a flange is a part for connecting machine parts, the flange has the tasks to correctly position the machine parts to each other and transmit the operating forces occurring. According to the invention, the flange and the rotor constitute a component.

Radially around the first section of the rotor, the stator is arranged, so that a radial working air gap is formed. This means that the stator is formed as a sleeve, wherein the stator preferably extends over the entire first portion of the rotor. However, the stator may also have a cup shape.

It is further advantageous if the stator has an outer diameter which is smaller than the outer diameter of the second portion of the rotor. Thereby, it is possible that the second portion of the rotor, that is, the flange is fastened by means of connecting elements coaxially to the end cap, wherein the connecting elements are arranged radially outside of the stator. As a connecting element preferably screws, in particular three screws are used. However, all other commonly used in mechanical fasteners are also conceivable.

It is also advantageous if the bearing housing partially encloses the bearing. This means that the bearing housing does not completely surround the bearing and thus there is no closed bearing housing. Preferably, the bearing housing encloses less than 50% of the bearing. The bearing housing is formed for example as an adapter.

It is likewise according to the invention if a double-row roller bearing is arranged in the bearing housing. Preferably, it is a double-row tapered roller bearing in O arrangement. For example, but also cylindrical roller bearings or spherical roller bearings can be used. The rolling bearing can be arranged on the wheelset by means of a press connection. The wheel set shaft can be designed as a solid or as a hollow shaft.

The stator is mounted on the rotor by means of one or more stator bearings, in particular rolling bearings, preferably roller bearings. Preferably, two stator bearings are present, formed in a single row and arranged at the axial ends of the stator. In addition, the stator is connected via a rotation with the bearing housing.

The current generated by the generator can be used for example for a measuring device to check the functioning of the rolling bearings.

Further details, features, combinations of features and effects on the basis of the invention will become apparent from the following description of a preferred, exemplary embodiment of the invention and from the drawings. These show in:

1 an embodiment of a generator system according to the invention in perspective view,

2 the embodiment of 1 in side view,

3 the embodiment of 1 in front view,

4 the embodiment of 1 in sectional view.

In the 1 to 4 is an embodiment of a generator system 1 shown in different views, the cable guides are not shown. The generator system 1 includes a generator 2 and a wheel bearing unit 3 , The wheelset bearing unit 3 includes a rolling bearing 4 for the storage of a wheelset shaft 5 , The wheelset shaft 5 is designed as a solid shaft on which the rolling bearing 4 is pressed on.

The rolling bearing 4 is formed in this embodiment as a tapered roller bearing in O arrangement and comprises a three-piece bearing inner ring 6 arranged in two rows rolling elements 7 , which are formed as tapered rollers, and a bearing outer ring 8th , The two outer parts of the bearing inner ring 6 each have a circumferential career 9 for the rolling elements rolling on it 7 on. Axial to the rolling bearing 4 each closes a seal 10 at. The seal 10 Prevents contamination or contamination in the rolling bearing 4 can enter. For this lies every seal 10 on a ring 11 where each ring 11 flush with the bearing inner ring 6 is applied and on the axle 5 deferred or pressed on. The Rings 11 are with respect to the seals 10 required surface provided.

Radially outside the bearing outer ring 8th of the rolling bearing 4 is a bearing housing 12 arranged, which is not closed and the rolling bearing 8th only partially encloses. The bearing housing 12 represents an adapter that can be connected to the rail vehicle.

At the front of the wheelset shaft 5 is an end cap 13 arranged by means of three connecting elements 14 with the wheelset shaft 5 rotatably connected. The end cap 13 is further with the generator 2 coupled, the axially on the side facing away from the wheelset end side of the end cap 13 is arranged. The generator 2 includes a rotor 15 and a stator 16 , where the stator 16 the rotor 15 partially encloses, leaving a radial working air gap 17 arises.

The rotor 15 furthermore, according to the illustrated embodiment, has two sections I . II on. The second section II of the rotor 15 is designed as a flange and by means of three connecting elements 14 with the end cap 13 connected. The first paragraph I however, carries a variety of magnets 18 on its outer circumference.

The outer diameter D _{AI of} the first section I is smaller than the outer diameter D _{AII of} the second section II , where the first section I radially from the stator 16 is enclosed. The stator 16 further has a smaller outer diameter D _S than the outer diameter D _{AII of} the second portion II of the rotor 15 on.

Further, the stator 16 by means of two stator bearings 19 on the rotor 15 stored. As stator bearings 19 For example, rolling bearings, in particular ball bearings can be used. The stator 16 is further designed as a sleeve, which has a rotation 20 with the stationary bearing housing 12 connected is. The anti-twist device 20 includes an anti-rotation unit 21 on the bearing housing 12 and a radially outwardly projecting stem 22 at the stator 16 , where the stem 22 and the stator 16 are formed in one piece. The anti-rotation unit 21 is by means of fasteners 14 on the bearing housing 12 appropriate. Furthermore, the anti-rotation unit 21 a stalk-like element 23 with a recess open in the axial direction 24 on. In this recess 24 grabs the stalk 22 and protrudes over the stalk-like element 23 out. This will be the stator 16 over the anti-twist device 20 held so that this is not with the rotor 15 can rotate with it.

LIST OF REFERENCE NUMBERS

1

 generator system

2

 generator

3

 axlebox

4

 roller bearing

5

 axle

6

 Bearing inner ring

7

 rolling elements

8th

 Bearing outer ring

9

 career

10

 poetry

11

 ring

12

 bearing housing

13

 endcap

14

 connecting element

15

 rotor

16

 stator

17

 Working air gap

18

 magnet

19

 Statorlagerung

20

 twist

21

 Anti-rotation unit on the bearing housing

22

 Stalk on the stator

23

 Stick-like element of the anti-rotation unit

24

 recess

I

 first section of the rotor

II

 second section of the rotor

D _AI

 Outer diameter of the first section of the rotor

D _AII

 Outer diameter of the second section of the rotor

D _S

 Outer diameter of the stator

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 102006035703 A1 [0002]
• AT 507382 B1 [0003]

Claims (9)

Generator system ( 1 ) for rail vehicles, comprising a generator ( 2 ) with a rotor ( 15 ) and a stator ( 16 ), and a Radsatzlagereinheit ( 3 ), the wheel set bearing unit ( 3 ) a warehouse ( 4 ) for supporting a wheel set shaft ( 5 ) as well as a bearing housing ( 12 ), wherein at the front side of the wheelset shaft ( 5 ) an end cap ( 13 ) and the end cap ( 13 ) with the rotor ( 15 ), and wherein the stator ( 16 ) with the bearing housing ( 12 ), characterized in that the rotor ( 15 ) two sections ( I . II ), the first section ( I ) radially from the stator ( 16 ) is enclosed. Generator system ( 1 ) according to claim 1, characterized in that the second section ( II ) of the rotor ( 15 ) is designed as a flange. Generator system ( 1 ) according to one of the preceding claims, characterized in that the second section ( II ) of the rotor ( 15 ) by means of connecting elements ( 14 ) coaxial with the end cap ( 13 ), wherein the connecting elements ( 14 ) radially outside the stator ( 16 ) are arranged. Generator system ( 1 ) according to one of the preceding claims, characterized in that the stator ( 16 ) via an anti-twist device ( 20 ) with the bearing housing ( 12 ) connected is. Generator system ( 1 ) according to one of the preceding claims, characterized in that the stator ( 16 ) is formed as a sleeve. Generator system ( 1 ) according to one of the preceding claims, characterized in that the stator ( 16 ) has an outer diameter (D _S ) which is smaller than the outer diameter (D _AII ) of the second portion ( II ) of the rotor ( 15 ). Generator system ( 1 ) according to one of the preceding claims, characterized in that between rotor ( 15 ) and stator ( 16 ) a radial working air gap ( 17 ) is available. Generator system ( 1 ) according to one of the preceding claims, characterized in that the bearing housing ( 12 ) the warehouse ( 4 ) partially encloses. Generator system ( 1 ) according to one of the preceding claims, characterized in that in the bearing housing ( 12 ) a double row rolling bearing ( 4 ) is arranged.

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