DE102009028566A1 - Device for production of electricity at pivotally supported component, is implemented as antifriction bearing for pivot support of component, where electricity is produced in antifriction bearing - Google Patents

Abstract

The device is implemented as antifriction bearing (6) for pivot support of component (4), where the electricity is produced in the antifriction bearing by the rotating motion of the antifriction bearing of supported component. Roll bodies (2) are arranged between an inner bearing (3) and an external bearing (1) of the antifriction bearing.

Description

The The invention relates to a device for generating electrical Energy to a rotating component according to the Preamble of claim 1.

In almost all branches of industry, the transmission of energy, Signals and data from a rotating to a stationary component needed. This allows static connections, as is the case with the use of cable towers, only one limited movement radius of the rotating component in relation to the stationary component. On the other hand, by the use slip rings and rotary joints a continuous Rotary movement of the rotating component by 360 ° allows. Furthermore, it is known from the prior art for transmission high data rates and high performance contactless technologies use.

in this connection Often, capacitive or optical systems are used to digital Transfer data at high bit rate to a rotating component; The achievable data rates are on the order of 10 Gbps. Furthermore, it is known for the transmission of electrical Performance a transmission system based on the principle an inductive series resonant converter to use, thereby Services from a few mW in the case of medical technology up to a few kW for industrial applications.

moreover is known, the contactless energy transfer with the contactless data transmission of conventional data buses such as CAN Bus, Profibus, Fast Ethernet, Gigabit Ethernet and EtherCAT to combine. Typical applications of these technologies are for example turntables and any kind of industrial robots, who have to repeat their movements millions of times with high precision.

In disadvantageously, in these known from the prior art Concepts for the transmission of energy, signals and data required from a rotating to a stationary component, so that the power and data line from the outside via a Cable connection supplied to the respective rotary transformer must become.

From the DE 10 2007 009 093 A1 a rolling bearing is known, which has a first tread and a second tread and arranged between the treads rolling elements, wherein on the rolling body an RFID tag is arranged, whereby a wireless retrieval of data is made possible. Here, at least one sensor is connected to the RFID tag or integrated into it.

Of the present invention is based on the object, a device for generating electrical energy at a rotationally mounted component, for example indicate on a rotating shaft through which on the component arranged electrical consumers supplied with electrical energy can be. This should be from the prior art required rotary transformer and the required Supply lines omitted.

These The object is solved by the features of claim 1. Further embodiments and advantages of the invention are apparent from the dependent claims.

Therefore is a device for generating electrical energy at a proposed rotating component, which as a rolling bearing designed for rotating storage of the component, wherein the electrical energy in the rolling bearing from the rotary motion of the mounted by means of the rolling bearing component, as Wave can be executed is generated.

According to the Invention are those between the outer bearing and the bottom bracket arranged rolling elements of the bearing permanently magnetized running and have at least one north pole N and a south pole S on, being in the bottom bracket or integrated into the outer bearing at least one inductive winding is. By the rotational movement of the means of the rolling bearing mounted component, which z. B. in the case of a wave can be firmly connected to the bottom bracket, the rolling elements set in rotation, due to their magnetic pole arrangement a time-varying magnetic field is generated, which according to Lenz's rule to the at least an inductive winding of the inner bearing or the outer bearing induced an electrical voltage.

By the inventive concept of production of electrical energy directly to the rotating component can Systems, such. As sensors and actuators, on the rotating mounted component are arranged to be supplied. This is eliminated advantageously the need for a rotary transformer and the required supply lines. Another advantage exists in that by the arrangement of the invention Device for generating electrical energy in a rolling bearing itself a very space-saving arrangement results, so that the inventive Device can be integrated into tight spaces.

The Invention will be described below with reference to the accompanying figures exemplified in more detail. Same or comparable Components are also provided with the same reference numerals. It demonstrate:

1 a schematic sectional view of a running according to the invention ball bearing, which also serves to generate electrical energy;

2 a schematic representation of the in 1 shown ball bearing in the unfolded state to illustrate the principle of operation of the device for generating electrical energy;

3 a schematic representation of the inner bearing of a designed according to the invention ball bearing in the unfolded state to illustrate a possible embodiment of the inductive windings; and

4 a schematic sectional view of a rotatably mounted by means of a ball bearing according to the invention embodied shaft on which a power supply from the inventive device for generating electrical energy radio unit is arranged.

According to the Invention is the device for generating electrical energy executed as a rolling bearing, wherein the generation electrical energy in the rolling bearing from the rotary motion of the mounted by means of the rolling bearing component, as Shaft can be executed, is possible.

In 1 is a ball bearing 6 shown which is an outdoor warehouse 1 , rolling bodies executed as balls 2 and an inner bearing 3 by means of which one with the bottom bracket 3 rotatably connected shaft 4 is rotatably mounted. According to the invention, the rolling bodies 2 designed to be permanently magnetized and have at least one north pole N and one south pole S. Furthermore, the invention provides that in the bottom bracket 3 at least one inductive winding 5 is integrated as based 2 and 3 illustrated.

The operation of the device for generating electrical energy is as follows: By the rotational movement of the shaft 4 become the rolling bodies 2 of the camp 6 set in rotation, wherein due to the magnetic pole arrangement, a time-varying magnetic field is generated, which results according to the Lenz's rule that in the inductive windings 5 in the bottom bracket 3 an electrical voltage is induced.

The corresponding operating principle is the subject of 2 , This slides the inductive windings 5 having bottom bracket 3 on the permanently magnetized running rolling bodies 2 via the stationary outer bearing 1 , As already explained, a temporally variable magnetic field is generated by the rotation of the rolling bodies, which in the inductive windings 5 of the inner bearing 3 an electrical voltage U induced.

According to the invention, by using a plurality of independent inductive windings 5 or conductor loops higher efficiency can be achieved. Here, the inductive windings 5 be combined by means of a rectifier circuit to a constant potential, each inductive winding 5 contributes to the overall performance. The circuits for smoothing the induced voltage U of the device may be outside the inner bearing 3 , For example, on the rotationally mounted component, in the figures as a shaft 4 is executed, attached.

Subject of the 4 is an overall system comprising a rolling bearing designed according to the invention 6 rotating shaft 4 , on the one with in the rolling bearing 6 generated electricity supplied radio unit 7 is arranged. According to the prior art, the operation of the radio unit 7 Energy required to be provided wirelessly or slip rings available, which requires in contrast to the inventive solution disadvantageous way additional space requiring components.

Furthermore, with the help of the rolling bearing 6 generated energy sensors or actuators are operated, which allows, for example, the implementation of a wireless torque sensor in tight spaces.

at the examples shown are the inductive windings in the bottom bracket integrated. It is, however, according to the invention possible, the inductive windings in the outer camp to integrate if z. B. the rotationally mounted component with the Outside bearing is firmly connected.

LIST OF REFERENCE NUMBERS

1

external storage

2

roll body

3

Bottom Bracket

4

wave

5

inductive convolution

6

roller bearing

7

radio unit

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 102007009093 A1 [0006]

Claims (7)

Device for generating electrical energy on a rotating component ( 4 ), characterized in that they serve as rolling bearings ( 6 ) for rotational support of the component ( 4 ) is carried out, wherein the electrical energy in the rolling bearing ( 6 ) from the rotational movement of the means of the rolling bearing ( 6 ) mounted component ( 4 ) is produced. Device for generating electrical energy on a rotating component ( 4 ), according to claim 1, characterized in that between an inner bearing ( 3 ) and an external warehouse ( 1 ) of the rolling bearing ( 6 ) arranged rolling bodies ( 2 ) are permanently magnetized and that in the bottom bracket ( 3 ) or in the external warehouse ( 1 ) at least one inductive winding ( 5 ) is integrated, wherein by the rotational movement of the rotatably mounted component ( 4 ) the rolling bodies ( 2 ) of the rolling bearing ( 6 ) are set in rotation, due to the magnetic pole arrangement, a time-varying magnetic field can be generated, which in the at least one inductive winding ( 5 ) of the inner bearing ( 3 ) or the external warehouse ( 1 ) induces an electrical voltage (U). Device for generating electrical energy on a rotating component ( 4 ), according to claim 2, characterized in that in the bottom bracket ( 3 ) or in the external warehouse ( 1 ) several inductive windings ( 5 ) are integrated and these are combined by means of a rectifier circuit to a constant potential. Device for generating electrical energy on a rotating component ( 4 ), according to claim 2 or 3, characterized in that the circuits for smoothing the generated induced voltage (U) outside the inner bearing ( 3 ) or the external warehouse ( 1 ) are mounted. Device for generating electrical energy on a rotating component ( 4 ), according to claim 4, characterized in that the circuits for smoothing the generated induced voltage (U) on the rotatably mounted component ( 4 ) are arranged. Device for generating electrical energy on a rotating component ( 4 ), according to one of the preceding claims, characterized in that the rotationally mounted component ( 4 ) is designed as a shaft, which with the bottom bracket ( 3 ) is rotatably connected, wherein the at least one inductive winding ( 5 ) in the bottom bracket ( 3 ) is integrated. Device for generating electrical energy on a rotating component ( 4 ), according to one of the preceding claims, characterized in that the rolling bearing ( 6 ) is designed as a ball bearing.

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