Aim: We develop a new structural continuously variable transmission
(CVT).
Features: It is expected that the CVT can be adopted in
natural energy power generation systems taking advantage of its features. In a
general power generation system utilizing natural energy, the energy power is
transmitted to an output side such as the generator for only one rotational
direction from an input side in such a turbine or a windmill blade. As for
applications of the CVT in these power generation systems, it is considered
that the CVT has some advantage points even if the energy power generated by
wind is not constant. This is because of the typical characteristic that energy
forces cannot be transmitted in the opposite direction.
Design: The proposed CVT consists of a closed-loop mechanism
using linkages, irreversible mechanisms, and linear slide mechanisms, and so
on, and it does not depend on frictional conduction force between several
conduction parts. Developed CVT has four sets of units consisting of
lever-crank mechanisms, which are categorized as four-bar linkage mechanisms,
and connected in parallel mechanically with its cranks at an input shaft, and
with fulcrums of its levers through each irreversible mechanism such as a
one-way clutch installed in an output shaft.
Methods: The motion of the four-bar linkage mechanism is
analyzed, and results compared simulation values with experimental values are
described.
Results: The CVT was able to control several gear ratios in
real-time by controlling the expansion and contraction of the lever with a high
accuracy using an electric linear actuator installed in each unit consisting of
the four-bar linkage mechanism.
Conclusion: The conduction efficiency of the CVT certainly
becomes higher as the performance of the mechanism does not depend upon
frictional forces under high-pressure conditions between components in the
conduction mechanisms.
Author(s) Details:
Toshihiro Yukawa,
Faculty of Science and Engineering, Iwate University, 4-3-5 Ueda,
Morioka, Iwate 020-8551, Japan.
Taisuke Takahashi,
Faculty of
Science and Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551,
Japan.
Teruhisa Koguchi,
Faculty of Science and Engineering, Iwate University, 4-3-5 Ueda,
Morioka, Iwate 020-8551, Japan.
Yoshiaki Ohshida,
Division of Technical Support, Iwate University, 4-3-5 Ueda,
Morioka, Iwate 020-8551, Japan.
Youichi Takeda,
Division of Technical Support, Iwate University, 4-3-5 Ueda,
Morioka, Iwate 020-8551, Japan.
Please see the link here: https://stm.bookpi.org/CPSTR-V7/article/view/13744
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