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This week we got a call from a customer who had a 17.5 kW Jacobs Wind Turbine (Jake) that was free spinning. We estimate that the blades were spinning approximately 50 rpms/minute…pretty fast. A coupling on the turbine’s drive shaft had broken before (above) the breaking mechanism (an unfortunate design flaw), so engaging the brake was not an option. It was necessary to climb the 100’ free standing tower and approach the blades from the backside, near the tail boom.  Broken coupling on drive shaft The tail was secured and positioned so that the turbine was out of the wind, slowing the blades down. This made it easier to slip a 3/8”, 6’ long Galvanized Aircraft Cable (GAC), which had been fed through an old hose to protect the blades from any damage, around the nacelle and over one of the blades. The GAC was tightly secured with saddle clamps to ensure it remains arrested until a new coupling can be replaced, (or the customer updates to a Bergey 10 kW!).  Secured GAC prevents the blades from free spinning
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Array Tech is a top global manufacturer of solar trackers. A Dual Axis Tracker follows the sun continuously, ensuring your array is always in optimum position. This can increase your power production by up to 40 % over a fixed array.
We have installed many DuraTrack DA Dual Axis Trackers and have found them to be very robust, even with the harsh environment and heavy winds we see here in Northwest Nebraska. Very minimal maintenance is needed, including lubricating the drive once a year and removing dirt or snow when needed. On a very rare occasion, it was necessary for us to replace the motor for a customer's tracker. Installing a new motor on a solar tracker might seem a little daunting, but it’s really quite an easy task if you follow the steps below. Instructions will come with your new replacement motor, however, we added a few steps and more pictures, to hopefully make replacement that much easier. |