Posts Tagged ‘repair’

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Bearing Repair Process

July 27, 2016

Electric generation companies make their money when it is hot outside. Consequently, they keep their machines running or available in the summer. Maintenance usually happens in the spring or fall…when the temperature is moderate.

Consequently, we have had some time at TRI to work on our web site. We undertook a big job to redesign it with a layout that will work devices of all size. We want it to look good on your desktop as well as your smart phone.

Our initial job is complete, but now we are adding more content for our customers.

Our latest addition is the Bearing Repair page. This page does more then just tell potential customers that TRI Transmission and Bearing Corp. repairs bearings. It is a bullet list of the steps bearings get when they come in the door. The list has been published so our customers understand what goes into a bearing repair.

When a bearing is sent to TRI during the summer, it usually means a machine is in an unscheduled outage. Unscheduled outages are expensive so it is critical that the repairs be done ASAP. When TRI goes to an expedited schedule, we work on the bearing repair 24 hours a day, 7 days a week. It’s important to us that the customer knows exactly what we are doing and how far along we are in the process.

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Bearing Repair and Refurbishing

December 2, 2010

Here is a photo I snapped in the shop this morning. It is a TRI Transmission & Bearing pad that has been sent back for refurbishing. The surface is rough because the babbitt has been puddled. The next process will be machining the surface to the proper diameter.

Babbitt bearing repair - puddling

 

The puddling process is a manual operation that takes some time. You can see the babbitt is laid down in rows.  After machining the bore, porosity will be revealed.  More babbitt will be laid down to fill the voids and the machining will be repeated.

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Scraped Babbitt Bearings Conform to Journal

October 11, 2010

A machine journal bearing creates a proper oil wedgeA Babbitt bearing bore that has been “scraped” will conform to the shaft journal it supports. A scraped bearing will not create a converging oil wedge which is necessary for proper vibration and temperature control. TRI highly recommends bearings that are machined to tight tolerances. For better performance, an elliptical bore will produce a secondary wedge film above the journal that will help to retrain the vibratory motion of the journal.

Journal bearing with a machine elliptical bore

TRI repairs babbitted bearings. We can centrifugally cast Babbitt or puddle the bore. We have many years of experience in machining to tight tolerances.