等速旋轉式液壓阻尼器之研究

Study on a constant-speed rotary hydraulic damper

黃國昇(kuo-sheng huang)

指導教授 ： 翁輝竹

中原大學/工學院/機械工程研究所/碩士(2017年)

https://doi.org/10.6840/cycu201700485

摘要

本研究在設計及開發ㄧ款等速旋轉式液壓阻尼器。首先，利用黏度計搭配溫度計及恆溫水浴槽，控制溫度的變化，藉以探討在不同溫度下黏度指數增進劑在液壓油中的比例對潤滑油有效黏度的影響，目的在求出對溫度響應最低的液壓油。接著，根據市場需求之規格及期望創新之效果，利用Solid Edge繪圖軟體設計阻尼器之機構，使該組尼器可以在緩衝阻尼的行程中等速緩衝，且經由專利索引，使該創作符合專利的新穎及進步性兩大要素。設計過程中，利用MDX-40A雕刻機製作出等速旋轉式液壓阻尼器之原型樣本，並且進行實體設計之驗證，使創意與實施性相結合，進而符合專利的實施性要素。進一步，製作出重力緩降門板環境的設施，藉以模擬緩降門板的環境條件，再利用動態攝影方式，實際測出阻尼器活塞截面積與洩壓微流道截面積比和緩降角速度之關係。使用CyberLink Power Director軟體，將影片切成各時間軸照片，求出各時間所對應之角度。利用前項實驗所獲得之結果，藉以獲得依不同緩降角度有不同截面積的洩壓微流道，使得緩降門板得以等角速度降落。最後再次利用緩降門板實驗設施重新驗證該緩降阻尼是否達等速之要求。
研究結果得知，黏度指數增進劑含量為12%時在5℃~35℃為最佳液壓油。利用繪圖軟體完成了一用於緩降門板的緩衝阻尼器設計圖，並製作了一可供實驗之阻尼器原型樣本。透過所獲得的待補正增加截面積之理論公式，修正了洩壓微流道，進而得到了ㄧ款等速的旋轉式液壓阻尼器。應用本研究之方法將可發展出任何需要等速緩衝之阻尼器。

關鍵字

液壓油,黏度指數增進劑,等速旋轉式液壓阻尼器,阻尼器活塞洩壓微流道

並列摘要

This study aims to design and develop a constant-speed rotary hydraulic damper. First, the effect of volume fraction of viscosity index improver (VII) in hydraulic oil on the effective viscosity of lubricants under different temperatures can be explored by using the viscometer, thermometer, and the constant-temperature water bath. The purpose is to find a hydraulic oil that has the lowest response to the temperature. Then, in order to meet market demand and expectations, a graphics software, Solid Edge, is used to design the mechanism of the damper, so that the loading can be dampened in uniform speed in the damping stroke. Through the patent survey, a new patent could meet the requirements of creativity and practicality. During the design, the MDX-40A engraving machine is first used to build the damper’s prototype, and then the prototype is tested and verified to confirm the design’s creativity and practicality, so that it fits the requirements of a patent. Furthermore, the facility of a gravity-descending door is constructed, so as to model the experimental situation, and the relationship between the angular velocity and the cross-sectional areas of the piston and microchannel is measured by using dynamic photography. Using the software CyberLink Power Director, the video is spliced into timeline photos where angles are calculated for each corresponding time. From the experimental results obtained, the revised cross-sectional area of the microchannel is derived from the different descending angles, thus allowing the descending door to fall at constant angular velocity. Finally, the descending door is experimentally tested again to reverify whether the damping is of constant angular velocity.
From the results of this study, it was found that the optimal volume fraction of viscosity index improver in hydraulic oil at 5℃~35℃ is 12%. A graphics software was used to design and draw a constant-speed rotary hydraulic damper using in a gravity-descending door, and then the damper’s prototype was experimentally built. The results were used to revise the cross-sectional area of the microchannel and then to obtain a constant-speed rotary hydraulic damper. By using the innovative method described in this study, any rotary damper of constant speed can be developed.

並列關鍵字

hydraulic oil ； viscosity index modifier ； constant-seed rotary hydraulic damper ； damper piston pressure-relief flow microchannel

參考文獻

Bhattacharya, A., Singh. T., and Verma, V. K., 1990, “EP activity evaluation of cyclic disulphides using ball bearings of different compositions,” Tribology International, 23, 361–365.

參考文獻

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