State-of-the-Art and Innovations in Mechanism and Machine Science by Unknown

Author:Unknown
Language: eng
Format: epub
ISBN: 9783031470400
Publisher: Springer Nature Switzerland

At the moment we have about 100 gears in series production with different types, dimensions (gear diameters from 20 to 570 mm), gear ratios (from 1 to 120 per stage), monthly production program usually amounts to 40–50 varieties of them with total number of gears about 2000. One can imagine that, taking into account the limited resources, it is possible only if each of the gears is optimized to the conditions of production, which ensures a quick and cheap preparation of the latter and the subsequent effective manufacture of products. In this case, for each object of production hundreds of variants are considered, and a large number of assessments is formed.

It would seem that low-speed gears do not have high demands on their design and manufacturing. However, this impression is deceptive. Leading manufacturers, striving to reduce costs and, accordingly, the mass and dimension characteristics of pipeline valve gearboxes have achieved results that look outstanding in comparison with gearboxes from other drive industry segments: the ratio of gearbox mass to the transmitted torque reaches values of 0.005 or even less in the best samples. The requirements to reduce the size and to ensure a high competitiveness of technical solutions in the multi-numbered small batch production gave grounds for the formation of some, in our opinion, important design trends.

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