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27 sty 2020 · In this study, an automatic simulation method for ana-lyzing the eficiency and heat balance of various designs of worm gears is developed and integrated in WTplus. First, suitable methods and calculations regarding the eficiency and heat balance calculation of worm gears are shown.
Massimiliano Turci, Elena Ferramola, Fabiola Bisanti and Giampaolo Giacomozzi. This paper outlines the comparison of efficiencies for worm gearboxes with a center distance ranging from 28 – 150 mm that have single reduction from 5 to 100:1. Efficiencies are calculated using several standards (AGMA, ISO, DIN, BS) or by methods defined in other ...
In principle, worm and worm gear work like a pair of helical gears in crossed configuration. The worm and worm gear have helices of the same hand. The worm has a large helix angle while the worm gear has a small one (e.g., 85° versus 5°).
The monograph describes general principles of worm gear systems and methods of creation of dynamic model of worm reducer or of an entire drive. It indicates possibilities of reduction of dynamic load of a gear in the mode of frequent start-ups and halts of the drive.
27 sty 2020 · A suitable abstraction of the gearbox by nodal points is conducted for an efficient and accurate calculation of local temperatures using a thermal network model. The simulation program WTplus was extended to automatically analyze the efficiency and heat balance of various designs of worm gears.
In order to secure reliable functioning of a worm gear it is necessary to maintain the oil sump temperature within acceptable limits. A thermal overload results in oil damage.
Worm gear design parameters. Worm gears provide a normal single reduction range of 5:1 to 75-1. The pitch line velocity is ideally up to 30 m/s. The efficiency of a worm gear ranges from 98% for the lowest ratios to 20% for the highest ratios.
