Fluid Drive Upgrades

May 14, 2014

Back in 2007, Dr. Mel created a presentation for fluid drive upgrades. This presentation explains how fluid drives are used specifically with boiler feed pumps. The operational history and the changes to the standard practices led to issues for which TRI has engineered solutions.






Controlling Oil Whirl with a Pressure Dam Bearing

March 28, 2014

In this video, we explain oil whirl and how a 2nd area of high pressure created by a pressure dam can tame the vibration caused by oil whirl.


Bearing Dovetail Grooves

March 25, 2014

Many bearing in the field use a dovetail bore design. TRI Transmission and Bearing Corp. explains why the dovetail design leads to Babbitt wipes and bearing failures.


Floating Seal Ring Design

February 26, 2014

TRI Transmission & Bearing has released a floating seal ring design for public use. The Solidworks assembly and part files can be downloaded from Grabcad.com: https://grabcad.com/library/floating-seal-ring-6-to-24-1

6" Floating seal ring assembly

6″ Floating Seal Ring


New Tech Note

February 8, 2013

It has been nearly two years since our last Tech Note, but today we have released the latest write up. This month’s topic is about bearings for turbine-generators found in nuclear electric generation plants.

Many nuclear plants run at 1800 RPM where many fossil fueled steam plants run at 3600 RPM. Considering the generator, half the speed means twice the poles dramatically increasing the weight of the rotor.

The new Tech Note focuses on heavily loaded bearings.


Minimizing Porosity in Rebabbitted Bearings

February 29, 2012

There are various ways to rebabbitt a bearing that has been in service previously, among them are centrifugal casting, static casting, and hand welding. Each one has advantages and disadvantages. The choice used depends, in part, on the material composition of the bearing backing material.

Some of the most difficult applications to rebabbitt are cast iron fan bearings that have water jackets. Essentially, these bearings have two walls to consider, an outside wall and an inside wall.

There are various concerns with these bearings.

Read the rest of this entry »


New Brake Installation

October 20, 2011

TRI has just completed the installation of a fluid drive brake. This system is similar to previous system that we have installed with the exception of larger calipers.

Industrial hydraulic brake for fluid drives

See our web site for more information about brakes and TRI Transmission and Bearing Corp.


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