| Summary: | 碩士 === 聖約翰科技大學 === 自動化及機電整合研究所 === 100 === Abstract
In recent years, global warming, climate change, and accelerating energy depletion have become crucial issues throughout the world. These problems are all caused by humans’ excessive consumption of the earth’s energy. Thus, “saving energy and reducing carbon emissions” is the most important issue humans currently face.
Presses machine are the most efficient traditional manufacturing tool. However, only 50% to 80% of their efficiency is utilized. If the energy from the presses machine can be recycled, a significant amount of energy can be saved. Taiwan has a large number of presses machine. The number of presses machine that exist throughout the world is tremendous. If the energy used by every movement of a presses machine could be recycled, the total amount of energy saved would be substantial. Therefore, in this study, we not only examined various structure types but also analyzed the energy recovery feasibility for each type of presses machine.
For this study, we selected a crank- presses machine and then used the rotating feed axis and the up- and down-stroke action to engage the three energy recovery mechanisms, namely direct drive electricity generation, accelerator electricity generation, and high-leadscrew electricity generation. Approximately 20% to 30% of the energy produced by the presses machine was converted into recycled electricity to achieve the goal of “saving energy and reducing carbon emissions.”
The results of a series of experiments conducted in this study show that the accelerator-type energy recovery mechanism design generated the highest average amount of electricity at 53.68Wh; this was 18 times the 3.53Wh generated by the
direct drive design and 4 times the value generated by high-leadscrew type design. After improving the design of the direct drive-type energy recovery mechanism by increasing the gear ratios, the average amount of electricity generated increased from 3.53Wh to 11.04Wh, nearly a 4-fold increase.
Although the high-leadscrew-type energy recovery mechanism design had high rotational speeds, the amount of electricity generated for recycling was less than expected. Although the electricity generating efficiency of the high-leadscrew mechanism was higher than that of the direct drive designs, it was less than that of the accelerator-type energy recovery mechanism. In addition to direct installation on the machine, both the direct drive and the accelerator-driven energy recovery/ electricity generating mechanisms can be equipped with a clutch, enabling flexible use as required. When energy recovery is required, the clutch can be connected. When not required, the clutch can be removed without affecting the standard operation of the stamping press, which is extremely useful.
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