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Design Improvement for a Planetary Gear System in Hydraulic Drive System
신유인(Yoo In Shin),윤찬헌(Chan Heon Yoon),한성길(Sung Gil Han),박성규(Seong Gyu Park),송철기(Chul Ki Song) Korean Society for Precision Engineering 2016 한국정밀공학회지 Vol.33 No.10
Planetary gear systems have several advantages over traditional gearboxes with parallel axis gear shafts. The planetary gearbox arrangement also creates greater stability due to the even distribution of mass and increased rotational stiffness. However, gears in planetary gear systems occasionally have a short-life due to wear and breakage by repetitive load during operation time. In this study, we evaluated variables of the strength design for each part and conducted structural analysis of seven cases of the planetary gear system. The result of structural analysis was applied to shape optimization method and obtaining the weight lightening designed value. Subsequently, the planetary gear system was performed to ensure the durability of gears during operation time with miner’s rule.
한성길(Sung Gil Han),신유인(Yoo-In Shin),윤찬헌(Chan Heon Yoon),송철기(Chul Ki Song) 한국기계가공학회 2014 한국기계가공학회지 Vol.13 No.5
A planetary gear train is more compact and endures greater amounts of transmission power compared to other gear systems. Although planetary gear systems operate in small volumes, they are capable of very high efficiency due to the compact combination of their gears in the planetary gear system. They also have outstanding efficiency of only 3% for power transmission, tantamount to the power loss that occurs in each of the shift stages. Given these advantages, planetary gear systems are used in the driving systems of, which are widely used in automobile transmissions, machine tools, semiconductor equipment, and in other areas in industrial fields. Current structural equipment requires higher efficiency and greater torque levels. According to these needs, we have designed a complex planetary gear system which creates higher levels of torque. In this paper, an evaluation of strength designs for the proposed planetary gear system was conducted to ensure the stability of the gear. In addition, a durability analysis based on Miner"s rule was performed using RS B 0095 device.
심재환(Jae-hwan Shim),한성길(Sun Gil Han),신유인(Yoo In Shin),윤찬헌(Chan Heon Yoon),송철기(Chul Ki Song) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
Planetary gear systems are used in driving system of excavators as reduction gear and widely used in industrial field such as transmission in automobile, machine tools, semiconductor equipment and so on. Planetary gear systems have advantages of high power density, large reduction in a small volume, multiple kinematic combinations, and axial direction of power path. Gears in planetary gear systems sometimes get short-life due to wear and breakage by repetitive load during operation time. In this paper, the strength design evaluation for the planetary gear system was performed to make sure the gears’ stability and durability during operation time.