Bearing insulation

Patent metadata

Field	Value
Publication number	US-9482283-B2
Application number	US-201514613578-A
Country	US
Kind code	B2
Filing date	Feb 4, 2015
Priority date	Jun 5, 2014
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

A bearing system for a wind turbine with a generator with an outer rotor, the bearing system including: an inner bearing ring, an outer bearing ring, a first electrical insulation element, a second electrical insulation element, a plurality of roller elements, a first metal element and a second metal element is provided. Therein, the roller elements are arranged at an inner volume between the inner bearing ring and outer bearing ring. The first electrical insulation element includes the first metal element. The second electrical insulation element includes the second metal element. The first electrical insulation element is arranged at least partially around the inner bearing ring in order to provide an electrical shielding to the inner of the bearing system and the second electrical insulation element is arranged at least partially around the outer bearing ring in order to provide an electrical shielding to the inner of the bearing system.

First claim

The invention claimed is:

1. A bearing system for a wind turbine with a generator with an outer rotor, the bearing system comprising:
an inner bearing ring;
an outer bearing ring;
a first electrical insulation element;
a second electrical insulation element;
a plurality of roller elements;
a first metal element; and
a second metal element;
wherein the plurality of roller elements are arranged at an inner volume between the inner bearing ring and outer bearing ring,
wherein the first electrical insulation element comprises the first metal element, the second electrical insulation element comprises the second metal element, the first electrical insulation element is arranged at least partially around the inner bearing ring in order to provide an electrical shielding to the inner of the bearing system, and the second electrical insulation element is arranged at least partially around the outer bearing ring in order to provide an electrical shielding to the inner of the bearing system;
wherein the first electrical insulation element and the second electrical insulation element each comprise a glass fiber laminates, the glass fiber laminates comprising a mesh.

2. The bearing system as set forth in claim 1 , wherein the first metal element is arranged on one side of the first electrical insulation element, and the second metal element is arranged on one side of the second electrical insulation element.

3. The bearing system as set forth in claim 2 , further comprising
a third metal element, and
a fourth metal element, wherein the first metal element and the third metal element are arranged at opposite sides of the first electrical insulation element, and
the second metal element and the fourth metal element are arranged at opposite sides of the second electrical insulation element.

4. The bearing system as set forth in claim 1 , wherein the mesh prevents intrusion of electromagnetic fields generated by frequencies into the respective electrical insulation element, the mesh comprising a metallic element, and the mesh preventing intrusion of electromagnetic fields generated by frequencies equal or larger than 10 MHz into the respective electrical insulation element.

5. The bearing system as set forth in claim 4 , wherein the mesh is sandwiched between a respective first part of the respective glass fiber laminates and a respective second part of the respective glass fiber laminates.

6. The bearing system as set forth in claim 1 , wherein the respective glass fiber laminates comprises a conductive electromagnetic shielding coating.

7. The bearing system as set forth in claim 1 , wherein the bearing system is for a wind turbine with a generator with an outer rotor for a rotor housing of the wind turbine.

8. A bearing system for a wind turbine with a generator with an outer rotor, the bearing system comprising:
an inner bearing ring;
an outer bearing ring;
a first electrical insulation element;
a second electrical insulation element;
a plurality of roller elements;
a first metal element; and
a second metal element;
wherein the plurality of roller elements are arranged at an inner volume between the inner bearing ring and outer bearing ring,
wherein the first electrical insulation element comprises the first metal element, the second electrical insulation element comprises the second metal element, the first electrical insulation element is arranged at least partially around the inner bearing ring in order to provide an electrical shielding to the inner of the bearing system, and the second electrical insulation element is arranged at least partially around the outer bearing ring in order to provide an electrical shielding to the inner of the bearing system;
wherein the first electrical insulation element comprises a glass fiber laminates, which prevent intrusion of electromagnetic fields;
wherein the glass fiber laminates comprise a mesh, the mesh comprising a metallic element.

9. The bearing system of claim 8 , wherein the mesh comprises a metallic element and prevents intrusion of electromagnetic fields generated by frequencies equal or larger than 10 MHz into the respective electrical insulation element.

Assignees

• Siemens Ag

Inventors

• Eriksen Uffe
• Samanta Subhra

Classifications

• F05B2220/7066

  via a direct connection, i.e. a gearless transmission · CPC title

• F03D9/002

  Mechanical Engineering · mapped topic

• F16C41/002 Primary

  Conductive elements, e.g. to prevent static electricity · CPC title

• H02K11/01

  for shielding from electromagnetic fields {, i.e. structural association with shields} (means for preventing or reducing eddy-current losses in the winding heads by shielding H02K3/42) · CPC title

• Y02E10/725

  Cross-Sectional Technologies · mapped topic