Splittorque face gear transmission, sikorsky aircraft. Quasistatic load sharing behaviours of concentric torquesplit. Application of facegear drives in helicopter transmissions dtic. Split torque concepts in this article, a split torque geartrain refers to any parallel shaft gear arrangement like the configuration shown in figure 1. This example used a splittorque, facegear configuration concept ref. A helicopter split torque main rotor drive system could consist of a bevel gear reduction with such a split torque stage. Geared devices can change the speed, torque, and direction of a power source.
Presented here is a redesign rebuilding a 6speed manual transmission for an. Gear technology, the journal of gear manufacturing issn 07436858 is published bimonthly by randall publishing, inc. The gear sizes of the concentric torquesplit face gear transmission are decreased by the torque splitting of the face gears and idlers. Research laboratory development of face gear technology. Also, the use of face gears allows a widerange of possible configurations with technical and. Gears almost always produce a change in torque, creating a mechanical. Gearing technology in its modern form has a history of gears to. There are two types of face gear with shaft angle 90, intersecting axis. Also, the use of face gears allows a widerange of possible configurations with technical and economic benefits ref. A lightweight, split torque transmission design utilizing face gears.
Gear assembles can have up to 14 gears engaging a single crown, as. Bold face diametral pitches and modules designate preferred values. Split torque gears are studied from two perspectives. In a stable arrangement, the helical gear faces are oriented so that each axial. This is often the choice in designing position control. Pdf on apr 11, 2012, abraham segaderobleda and others published split. A gear or cog is a rotating machine part having cut teeth or, in the case of a cogwheel, inserted teeth called cogs, which mesh with another toothed part to transmit torque. This technical manual is written as an aid for the designer who is a beginner or only superficially knowledgeable about. Box 1426, elk grove village, il 60007, 847 4376604. Scientific and technical findings by nasasponsored contractors. This technical manual is written as an aid for the designer who is a beginner or only. The pinion drives in between the two face gears and the input torque is distributed to the upper and lower face gears. A toothed disk gear, can be matched with spur or helical gear.
In involute gears, distance from one face of a tooth to the corresponding face. This example used a split torque, face gear configuration concept ref. In this case, a circular pitch is chosen that is an integer or a special fractional value. Elements of metric gear technology t23 circular pitch, p, is also used to represent tooth size when a special desired spacing is wanted, such as to get an integral feed in a mechanism. The material in this section has been reprinted with the permission of mcgraw hill book. The pinion is designed to float, so that the torque can be divided evenly to. Gear technology is where engineers and manufacturers come to find technical articles on gear design, engineering and manufacturing, and where the gear industry comes to locate suppliers of gear machines, gear cutting tools and related services.
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