Goodrich Rome

104 Otis Street
Rome, NY 13441-4714
Phone: 315-838-1200
Fax: 315-838-1477

Commercial Couplings Proven, State of the Art Technology

Proven Technology

120,000 Diaphragm Couplings in Service
10 Million hour MTBF

Goodrich’ (The former Bendix Fluid Power Division) development of the contoured diaphragm coupling initiated in 1952 and after three years of research the first diaphragm coupling was delivered for an aircraft application in 1955. This aerospace proven technology developed by Goodrich yielded the most reliable and light weight approach to transferring torque and misalignment. In 1967 Goodrich supplied the first contoured diaphragm coupling for use in the industrial petrochemical market. Goodrich has supplied well over 120,000 contoured diaphragm couplings over the past four decades. Over this time our reliability has been proven with a Mean Time Between Failure (MTBF) of over 10 million operating hours. Goodrich is the World's Technology Leader for Power Transmission Couplings in the Industrial, Marine and Aerospace Markets. Goodrich has provided diaphragm couplings in the field from as small as 4 inches in diameter to as large as 80 inches in diameter (See Figure 1).

Leading the State of the Art

Custom 455 Stainless Steel
Patented Diaphragm
New Low Moment
API 610 Economic Design

Goodrich's stainless steel diaphragm couplings (99/100 Series) have been in the field for over four years. This maximum performance design can't be matched by any other dry coupling of comparable size. Custom 455 stainless steel material has 30% greater strength than 15-5 PH with similar corrosion protection properties. Goodrich Stainless Steel Couplings are, by far, the superior contoured diaphragm on the market.

Goodrich continues to be on the leading edge of Coupling Technology. Our latest Diaphragm patent optimizes the diaphragm shape to yield the lowest stress for a given application torque and misalignment. Previous to this technology break through all diaphragm sizing was optimized only for torque using Wolff's conventional diaphragm design. Therefore Goodrich can provide the state of the art technology for a given set of conditions using either design.

Goodrich' new low moment coupling shown in Figure 4 on page 4 uses our standard diaphragms welded to the backside of the hub eliminating the need to put the diaphragm on top of the hub. This design will be the future benchmark for having the lowest moment since the coupling half weight will be the lowest for a comparable bore size coupling and smallest centroid distance because of the flex element position. No other coupling manufacturer has our radial weld experience and therefore can not match this design. The customer is asked to verify that sufficient clearance between the bearing housing exist with the diaphragm. This design in ideal for those applications where lateral critical speeds are a concern.

Presently Goodrich has a patent pending on our new API 610 & 671 Diaphragm Couplings, shown in Figures 4 and 5 on pages 4 and 5 respectively, where we have developed a non welded joint for lower torque transmitting applications. This joint is still permanent with no additional hardware and therefore has the same balance repeatability of Goodrich standard design but is more compatible for mass production.

E-mail: info.rome@goodrich.com

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