WHEELSET BEARING FOR A RAIL VEHICLE AND METHOD FOR OPERATING A SENSOR SYSTEM OF A WHEELSET BEARING

Abstract

A wheelset bearing for a rail vehicle has a generator which is designed as a claw-pole generator, which includes at least one non-rotating claw ring, as well as a sensor system supplied with electrical energy by the generator The sensor system has a plurality of sensor system modules which are at least partially fastened to a sensor carrier placed on the claw ring and which are connected to a common data line.

Claims

1. A wheelset bearing for a rail vehicle, a generator configured as a claw-pole generator that includes at least one non-rotating claw ring and a sensor system which is supplied with electrical energy by the generator, which comprises a plurality of sensor system modules at least some of which are attached to a sensor carrier placed onto the claw ring and connected to a common data line.

2. The wheelset bearing according to claim 1, wherein the sensor system comprises at least one spatially resolving sensor system module.

3. The wheelset bearing according to claim 2, wherein the spatially resolving sensor system module is part of an odometry system.

4. The wheelset bearing according to claim 2, the spatially resolving sensor system comprises a speed sensor.

5. The wheelset bearing according to 4claim 1, wherein a temperature sensor is provided as a sensor system module fastened to the sensor carrier.

6. The wheelset bearing according to claim 1, wherein an acceleration sensor is provided as a sensor system module fastened to the sensor carrier.

7. The wheelset bearing according to claim 1, wherein a lubricant sensor is provided as a sensor system module fastened to the sensor carrier.

8. The wheelset bearing according to claim 1, wherein the sensor system comprises a compression sensor spaced apart from the sensor carrier.

9. The wheelset bearing according to claim 1, wherein the sensor system comprises a force sensor in a form of a strain gauge spaced apart from the sensor carrier, wherein the strain gauge is arranged on an outer ring of a rolling bearing ring which is stationary relative to the claw ring. 10. A method for operating a sensor system of a wheelset bearing of a rail vehicle, the method comprising: generating electrical energy by a claw-pole generator, which comprises a non-rotating claw ring, and operating a sensor system comprising a plurality of sensor system modules arranged at least partially on the claw pole generator within an annular space, and transmitting data supplied by the sensor system modules via a line configured to serve as a power supply line.

11. A method for operating a sensor system of a wheelset bearing of a rail vehicle, comprising: arranging one or more of a plurality of sensor system modules on a claw-pole generator comprising the wheelset bearing; generating electrical energy by means of the claw-pole generator; and transmitting the electric energy to the sensor system modules by means of a power supply line.

12. The method of claim 11, wherein arranging includes attaching at least one of the plurality of sensor system modules to a sensor carrier.

13. The method of claim 12, wherein attaching includes placing the sensor carrier onto a non-rotating claw ring.

14. The method of claim 13, wherein attaching includes connecting the sensor carrier to the power supply line.

15. The method of claim 11, wherein transmitting includes transmitting data supplied by the sensor system modules by way of the power supply line.

16. The method of claim 11, wherein generating includes transmitting electrical energy to the sensor system modules by way of the power supply line.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the following, an exemplary embodiment of the disclosure is explained in more detail by means of a drawing. In the figures:

[0019] FIG. 1 shows a perspective view of a housing cover of a wheelset bearing including various different sensor components,

[0020] FIG. 2 shows the wheelset bearing including the housing cover in a sectional view.

DETAILED DESCRIPTION

[0021] A wheelset bearing identified overall with the reference number 1 is intended for use in a rail vehicle and comprises a rolling bearing 2, namely a roller bearing, with which a wheelset shaft 3 is mounted in a housing 4 of the wheelset bearing 1. The housing 4 is closed by a housing cover 5. A fastening tab of the housing cover 5 is denoted by 6. The outer ring, denoted by 7, of the rolling bearing 2 is received in the housing 4. The inner ring of the rolling bearing 2, denoted by 8 and held on the wheelset shaft 3, is the rotating bearing ring of the rolling bearing 2. The inner ring 8 makes contact with an end cap 9, which is attached to the end face of the wheelset shaft 3 with the aid of screws 10. On the end cap 9 there is a magnetic tape 11, which can be assigned to a claw-pole generator 12.

[0022] The magnetic tape 11 rotating during operation of the wheelset bearing 1, on the circumference of which there are magnetic poles with alternating polarity, interacts with a stator 13 of the claw-pole generator 12 attached in the housing 4. The stator 13 comprises a coil body made of glass fiber-reinforced plastic and two mutually parallel claw rings 14, 15, between which there is a coil winding 16 made of copper. The claw rings are deep-drawn and stamped sheet metal parts. The claw ring 14 carries a sensor system 17, which will be discussed in more detail below. The claw rings 14, 15 are also referred to as claw sheets.

[0023] A sensor carrier 18 is placed directly on the claw ring 14 and extends arcuately over part of the circumference of the claw ring 14. Among other things, an odometry sensor 19 and a speed sensor 20 are attached to the sensor carrier 18 as spatially resolving sensor system modules 19, 20. A temperature sensor 21, an acceleration sensor 22 and a lubricant sensor 28 are held on the sensor carrier 18 as ftirther sensor system modules. The sensor system modules 19, 20, 21, 22, 28 are connected to a common line 23. An associated level converter is denoted by 24. The line 23 is designed to both transmit data and to supply the entire sensor system 17 with energy via the claw-pole generator 12. Cable bushings for the sensor system 17 in the claw ring 14 are denoted by 25.

[0024] In addition to the sensor system modules 19, 20, 21, 22, 28 attached to the sensor carrier 18, the sensor system 17 comprises two sensors 26, 27 spaced from the sensor carrier 18, namely a compression sensor 26 and a force sensor 27. The compression sensor 26 is located on the outer ring 7 of the rolling bearing 2. The force sensor 27 is a strain gauge attached to the outside of the housing 4. The sensors 26, 27 are also linked in terns of data technology via the line 23 or separate lines to those sensor system modules 19, 20, 21, 22, 28 that are located on the sensor carrier 18. As a circuit board connected to the claw ring 14, the sensor carrier 18 is an integral part of the claw-pole generator 12.

[0025] List of reference symbols

[0026] 1 Wheel set bearing

[0027] 2 Rolling bearing

[0028] 3 Wheelset shaft

[0029] 4 Housing

[0030] 5 Housing cover

[0031] 6 Fastening tab

[0032] 7 Outer ring

[0033] 8 Inner ring

[0034] 9 End cap

[0035] 10 Screw

[0036] 11 Magnetic tape

[0037] 12 Claw-pole generator

[0038] 13 Stator

[0039] 14 Claw ring

[0040] 15 Claw ring

[0041] 16 Coil winding

[0042] 17 Sensor system

[0043] 18 Sensor carrier

[0044] 19 Odometry sensor

[0045] 20 Speed sensor

[0046] 21 Temperature sensor

[0047] 22 Acceleration sensor

[0048] 23 Line

[0049] 24 Level converter

[0050] 25 Cable bushing

[0051] 26 Compression sensor

[0052] 27 Force sensor

[0053] 28 Lubricant sensor