TRI’s Analytical Engineering Background:
TRI was founded as a Consulting Engineering Company in 1961 to provide rotor-dynamic and bearing design and analysis services for rotating machinery. Through the years, we have helped manufacturers and users obtain improved vibration levels and extended bearing life in a wide range of rotating equipment.
TRI Engineers have developed mathematical models of flexible rotors and film bearings and prepared extensive computer programs that have been used to simulate hundreds of rotor-bearing systems. We continue to use these programs to determine bearing performance characteristics and vibratory behavior of customers’ rotating equipment.
TRI has manufactured hundreds of journal bearings since the early 1970s: tilting-pad and fixed bore, from 1” (25 mm) to 30 “ (750 mm), all types of supports, and for a wide range of applications and speeds. As of 2015, TRI has manufactured journal bearings that are installed in over 50,000 MW of electrical generation and other processes around the world.
TRI’s Specialty Journal Bearing
TRI’s specialty journal bearing is the TRI Align-A-Pad® Tilting Pad Journal Bearing, the premier journal bearing for almost all applications where long term performance is required (100,000 hours between inspections) and where dynamic alignment conditions between the foundation and the journal exist (cold to hot, loaded to unloaded), as occurs in most turbines, generators, and related machinery. The TRI Align-A-Pad® Bearings have also been found to survive when lube oil supplies are interrupted for short time periods, and they continue to run afterwards.
TRI Customer Support and Schedules:
TRI works with many customers: Manufacturers of rotating equipment, End Users, Turbine and Generator Retrofit Companies, Engineering-Procurement-Constructors, and other Consultants. In early conversations with a customer, a plan of action is developed that identifies the problem to be addressed, such as a new design or resolution of an existing vibration or bearing damage problem. Whether it is an emergency matter or a long-term issue to be solved in a future scheduled outage, the customer’s anticipated schedule for completing the solution is critical to the action plan.
If the problem is a damaged bearing to be repaired immediately, TRI can work around the clock to rebabbitt, refurbish, and remachine the bearing, large (30 inches –750 mm or bigger) or small (under 2 inches –50 mm). In many such cases, with no additional time, or very little additional time, TRI can provide an improved design of an existing bearing to avoid repeat failures. In some cases, the best solution is to redesign the bearing completely to be installed in the future. A redesign may use a different type of bearing, such as a tilting pad bearing to replace a fixed bore bearing, different materials, and/or major feature upgrades.
TRI engineers have the experience to analyze rotor vibration issues and bearing failures and TRI has the capabilities to get your machines turning again.
TRI Shop resources are very substantial: TRI can centrifugally cast Babbitt Bearings up to 70 inch (1750 mm) outside diameter, generally up to 40 inch (1.00 meter) bore, and weighing up to 20,000 lbs (9,500 kg).
This catalog is divided into 5 sections, each related to a portion of our Bearing Business:
Section 1 addresses TRI’s design philosophy regarding bearing clamping. TRI’s preferred method is described as well as reasons why TRI Bearings often replace bearings using other clamping methods.
Section 2 describes a number of tilting pad bearing designs, especially demonstrating the benefits and features of TRI Align-A-Pad ® bearings.
Section 3 shows many fixed bore bearing designs that TRI has designed and manufactured new. These designs use the best features known to minimize bearing wear on turning gear, to control rotor vibrations, and to limit bearing metal temperatures. There are different alignment schemes, bearing Babbitt bore geometries, lube oil supply and drain features and passageways, and other details to be considered.
Section 4 presents bearings initially made by other manufacturers that TRI has refurbished, repaired, or modified.
Section 5 explains various auxiliary items and related equipment that TRI designs, manufactures, and supplies to our customers to support TRI equipment and bearings. Also included is a description of our large centrifugal Babbitt casting machine.