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Jubo Li, Songlin Wang, Jianjun Yang, Huijie Zhang and Hengbo Zhao
The gear test bench is important equipment for analyzing gear performance, detecting gear quality, and providing basic data for gear design and machining. In order to monitor the running state of the gear test bench, predict its running performance both ...
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Victor Shapovalov, Alexander Klochko, Magomedemin Gasanov, Olesya Antsyferova, ?nna Belovol
Pág. 59 - 70
The subject matter of the research is issues related to the optimization of the technology for reconditioning large-size high precision gear rims of the drives of mining complexes, mine lifting equipment, heavy vehicles; these issues are a perspective tr...
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Yongquan Yu, Chao Lin and Ping Xu
Noncircular gear and curve face gear are collectively referred to as spatial noncircular gear. Combined with the transmission characteristics of spatial noncircular gear, a new classification design method of spatial noncircular gear continuously variabl...
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Songyang Zhang, Qiaozhi Yin, Xiaohui Wei, Jiayi Song and Hong Nie
During aircraft braking, the change of ground adhesion forces can cause forward and backward vibration of the landing gear, and the performance of the brake disc may exacerbate this vibration. In order to solve this problem, a rigid?flexible coupling dyn...
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Silvia Maláková, Michal Pu?kár, Peter Frankovský, Samuel Sivák and Daniela Harachová
The basic properties of gears must be considered: the shape of their gearing, their load capacity, and the meshing stiffness, which affects the noise and vibration. When designing large gears, it is important to choose the correct shape of the gear body....
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Hyo-Seong Jang, Chang-Hyun Lee, Gun-Young Park and Chul Kim
Non-circular gears can maintain rotational motions of general gears and implement all varying rotational motions of the cam. They adjust the angular velocity of driven gear according to operating conditions and make precise changes in angular motion. The...
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Wei Huang, Jianfeng Huang and Chengliang Yin
Multispeed transmissions are helpful for improvement of the economy and drivability of electric vehicles (EVs). In this paper, we propose a two-speed transmission based on dual planetary gear mechanism, in which shifts are realized by torque transfer bet...
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Yanming Mu, Xiangying Hou and Xueming He
Gear vibration becomes unmanageable under extreme conditions, which shortens the time between overhauls of the helicopter reducer and affects the service efficiency of helicopters. For this purpose, an active precontrol strategy for shape and performance...
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Haiwei Wang, Cheng Ji, Fengxia Lu, Cheng Wang and Xueyan Sun
The dynamics analysis of a planetary gear set transmissions requires the creation of completely different models for different gears, which is very tedious. In this paper, a generalized dynamics modeling process is proposed for a three planetary gear set...
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Wei Chen, Yuzhou Tian, Qiang Sun and Pengfei Zhu
Due to the special meshing of convex and concave tooth profiles, an S-shaped tooth profile gear with a few teeth has the advantage of reducing the contact stress and improving the contact ratio. However, the theoretical inseparability of the center dista...
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Bang-Hyun Jo, Dae-Sung Jang, Jai-Hyuk Hwang and Yong-Hoon Choi
The landing gear of an aircraft serves to mitigate the vibration and impact forces transmitted from the ground to the fuselage. This paper addresses magneto-rheological (MR) damper landing gear, which provides high shock absorption efficiency and excelle...
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Zhiqiang Guo, Shenlong Li, Wei Wu and Liuyang Zhang
The quasi-static load sharing characteristics of a planetary gear set with planet journal bearings are numerically investigated. The application of journal bearings instead of rolling bearings in planetary gear sets is an alternative to increase the rota...
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Fei Ren, Ansheng Li, Guiqin Shi, Xiaoling Wu and Ning Wang
In the presence of manufacturing errors, the dynamic properties of herringbone planetary gear train (HPGT) can be altered from the originally designed properties to have undesired behavior. In this paper, by considering the herringbone gear actual struct...
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Huaiju Liu, Heli Liu, Caichao Zhu and Ye Zhou
With the mounting application of carburized or case-hardening gears and higher requirements of heavy-load, high-speed in mechanical systems such as wind turbines, helicopters, ships, etc., contact fatigue issues of gears are becoming more preponderant. R...
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Wenchen Shen, Huilong Yu, Yuhui Hu and Junqiang Xi
Currently, most hybrid electric vehicles (HEVs) equipped with automated mechanical transmission (AMT) are implemented with the conventional two-parameter gear shift schedule based on engineering experience. However, this approach cannot take full advanta...
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Jianfeng Ma, Tongtong Liu, Chunqing Zha and Liuyang Song
The gear is one of the important parts of a rotary gearbox. Once catastrophic gear failure occurs, it will cause a great threat to production and life safety. The crack is an important failure factor causing changes in time-varying stiffness and vibratio...
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????????? ????????????? ??????, ????????? ?????????? ????????, ?????? ????????? ?????????, ???? ???????????? ???????, ????? ????????????? ??????????
Pág. 38 - 47
The subject of the research in the article are topical issues related to the development of technology for the repair and restoration of large-sized gears of drives of walking excavators, ore-grinding mills, ball mills. The goal is to develop a new techn...
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Yu. Ya. Vodianikov,S. V. Kukin,K. L. Zhykhartsev
Pág. 72 - 74
The authors have constructed nomographs of dependence of the gear ratio of a lever-type braking gear on the tare of passenger and freight cars according to the calculated limit coefficient of wheel/rail clutch. It has been shown that for passenger cars w...
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Yanan Wang, Keyuan Li, Baijie Qiao, Zhixian Shen and Xuefeng Chen
The internal gear is part of the planetary and epicyclic gear pairs in the transmission system of the helicopter. Gear tooth wear is one of the most usual gear failures. This paper establishes an analytical model to evaluate the influence of tooth wear o...
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Jianmin Wen, Chenqi Fu, Hong Zhang and Bindi You
The internal beveloid gear has good scientific research value and a broad application field. However, there is a lack of research on the nonlinear vibration characteristics of internal beveloid gears. The present study establishes a nonlinear vibration m...
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