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Emergency Lube Oil System

August 25, 2014

TRI just complete an emergency lube oil system that uses an uninterruptable power supply (UPS).  The UPS provides AC power to a lube oil pump. Because AC components are generally easier and cheaper to acquire,  the new system was cheaper, lead times were shortened and the AC technology simplifies any future replacement parts.

  • DC power supplies are quite common in the electric generation industry. There are several drawbacks to DC emergency lube oil systems:
  • Large banks of DC batteries have to be handled with a great deal of caution.
  • DC motors must be specially designed for speed stabilization.
  • Implementing DC switchgear often is problematic.
  • It is difficult today to find electrical suppliers who have any significant understanding of DC power systems.  It is difficult to get DC components that you need, even when you have exact specifications for equipment that was commonly available a few years ago.

TRI emergency lube oil systems are customized to our customers needs.

  • Pumps and AC drives can be incorporated that are already implemented at the customer site. This reduces replacement parts and training.
  • Components are sized for the lube oil requirements. 
  • Piping and hardware can be customized for harsh environments. 

Call TRI at 800-363-8571 if you are looking to upgrade or install a new emergency lube oil system.

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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.

 

 

 

 

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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.

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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.

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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

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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.

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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 »

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