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DRIP LOOP CABLE PROTECTIVE DEVICE

IP.com Disclosure Number: IPCOM000235912D
Publication Date: 2014-Mar-28
Document File: 7 page(s) / 259K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present invention proposes a technique to provide protective device to a drip loop power cable in a wind turbine. The technique includes a bearing type of arrangement inside a bracket from where the drip loop power cable is passing. While yawing, the drip loop power cable rotates and touches inside surface of the bearing. This allows movement of the power cables in clockwise and counter clockwise direction. The bearing type arrangement or circular balls rotates 3600 degree, which favors axial and radial movement.

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DRIP LOOP CABLE PROTECTIVE DEVICE

BACKGROUND

The present invention relates generally to a wind turbine and more particularly to a cable protective device in the wind turbine.

During yawing in the wind turbine, drip loop power cables are in top section of a tower. The drip loop power cables revolve along with a nacelle in the wind turbine. Rotation of the cables results in continuous rubbing. Continuous rubbing of rubber in the cable sticks to sidewall of bracket through which the cable passes in the tower.  After some time, rubber of the cable peels off from bracket and then from armor cast. As a result, rubbing from sidewalls of bracket provides abrasion of the cable. Rubbing provides wear and tear out of the cables and damage occurs in yaw deck section. This issue is faced by many of the turbines.

A conventional technique includes a poly vinyl chloride (PVC) tube that is utilized to protect the cables in the wind turbine. However the conventional technique has issues of overheating of PVC tubes.

It would be desirable to have an efficient technique to protect the cables from abrasion and damage in the wind turbine. 

BRIEF DESCRIPTION OF THE DRAWING

Figure 1 depicts bearing type arrangement or circular balls for axial and radial movement.

Figure 2 depicts circular balls for the cable arrangement.

Figure 3 depicts brackets for holding the bearing arrangement or circular balls.

Figure 4 depicts arrangement of the fleet.

Figure 5 depicts arrangement of the fixed ring, the rotating ring and brackets.

Figure 6 depicts split bearing arrangement for the wind turbine.

Figure 7 depicts half ring installation.

DETAILED DESCRIPTION

The present invention proposes a technique to provide protective device to a drip loop power cable in a wind turbine. The technique includes a bearing type of arrangement inside a bracket from where the drip loop power cable is passing. While yawing, the drip loop power cable rotates and touches inside surface of the bearing. This allows movement of the power cables in clockwise and anti clockwise direction. The bearing type arrangement or circular balls rotates 3600 degree,which favors axial and radial movement. Figure 1 depicts bearing type arrangement or circular balls for axial and radial movement.

Figure 1

The circular balls are close enough so that the cable does not tangle. Figure 2 depicts circular balls for cable arrangement.

Figure 2

Figure 3 depicts brackets for holding the bearing arrangement or circular balls.

Figure 3

There are two types of arrangement for a fleet in the t...