This paper presents a brief description and several illustrations of a new concept of marine reversing gears that utilize high-performance differentially driven epicyclic gear arrangements. This new marine power transmission has the potential to offer high reliability, simplicity, light weight, high mechanical efficiency, compactness, and technological compatibility with aircraft derivative marine gas turbine engines. Further, this new reversing gear minimizes the danger of driving the free turbine in reverse as might be the case with conventional parallel shaft reversing gear arrangements. To illustrate the weight reduction potential, a modern naval ship propulsion system utilizing an aircraft derivative gas turbine engine as the prime mover in conjunction with a conventional parallel shaft reversing gear can be compared to the subject reversing gear differential. A typical 18,642 kW (25,000 hp) marine gas turbine engine might weigh approximately 5000 kg (11,000 lb) and a conventional marine technology parallel shaft reversing gear might weigh on the order of 90,000 to 136,000 kg (200,000 to 300,000 lb). Using gear technology derived from the aircraft industry, a functionally similar differentially driven marine reversing gear might weigh approximately 13,600 kg (30,000 lb).
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October 1988
Research Papers
A New Concept of High-Performance Marine Reversing Reduction Gears
D. J. Folenta
D. J. Folenta
Transmission Technology Co., Inc., Fairfield, NJ 07006
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D. J. Folenta
Transmission Technology Co., Inc., Fairfield, NJ 07006
J. Eng. Gas Turbines Power. Oct 1988, 110(4): 572-577 (6 pages)
Published Online: October 1, 1988
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Received:
November 30, 1987
Online:
October 15, 2009
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A commentary has been published:
Discussion: “Transient Response of Floating Ring Liquid Seals” (Kirk, R. G., 1988, ASME J. Tribol., 110, pp. 572–577)
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Folenta, D. J. (October 1, 1988). "A New Concept of High-Performance Marine Reversing Reduction Gears." ASME. J. Eng. Gas Turbines Power. October 1988; 110(4): 572–577. https://doi.org/10.1115/1.3240173
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