检索范围:
排序: 展示方式:
High-precision gyro-stabilized control of a gear-driven platform with a floating gear tension device
《机械工程前沿(英文)》 2021年 第16卷 第3期 页码 487-503 doi: 10.1007/s11465-021-0635-5
关键词: inertially stabilized platform floating gear tension device nonlinear friction disturbance compensation proportional multiple-integral observer
石照耀,费业泰,谢华锟
《中国工程科学》 2003年 第5卷 第9期 页码 13-17
全面概述了过去100年齿轮测量技术的发展历程,给出了6件标志性事情;着重论述了测量原理的演变、实现测量原理技术方式的发展以及测量结果的表述与利用;介绍了当今CNC齿轮测量中心的原理、组成和特点;结合90年代以来齿轮测量技术领域中几股新潮流,展望了未来齿轮测量技术的一些研究方向。
Gear fault diagnosis using gear meshing stiffness identified by gearbox housing vibration signals
《机械工程前沿(英文)》 2022年 第17卷 第4期 doi: 10.1007/s11465-022-0713-3
关键词: gearbox fault diagnosis meshing stiffness identification transfer path signal processing
Russian school of the theory and geometry of gearing: Its origin and golden period (1935 --1975)
Dmitry BABICHEV,Sergey LAGUTIN,Natalya BARMINA
《机械工程前沿(英文)》 2016年 第11卷 第1期 页码 44-59 doi: 10.1007/s11465-015-0360-z
During the second half of the twentieth century, Soviet scientists were among the world leaders in the theory and geometry of gearing or the theoretical fundamentals of designing gears and gear-cutting tools. The authors of the current paper review works related to the development of the theory of gearing (TG) written in Russian from the mid-1930s to the present. Overall, the review covers more than 400 publications of nearly 200 authors (among more than 1000 studied works). This review involves some works on gear strength and accuracy to attract more experts.
This paper presents a short list of works from the seventeenth century to the nineteenth century and discusses the basic concepts of the TG. This paper also includes a review of more than 160 papers in Russian for the period of 1935–1975, which is the “golden age” of the TG. The main features and achievements during this period are also considered.
The distinctive feature of this review is the use of diagrams that visually present TG experts and the dates and themes of their published works. The diagrams also show the following aspects: 1) The most popular and important themes in a specific period, 2) the most important publications on the themes of interest to readers, and 3) the direction of the works and scope of interests of every researcher.
关键词: theory of gearing (TG) gear geometry generating surface gear synthesis gear analysis
Yun KONG, Tianyang WANG, Zheng LI, Fulei CHU
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 406-419 doi: 10.1007/s11465-017-0419-0
Planetary transmission plays a vital role in wind turbine drivetrains, and its fault diagnosis has been an important and challenging issue. Owing to the complicated and coupled vibration source, time-variant vibration transfer path, and heavy background noise masking effect, the vibration signal of planet gear in wind turbine gearboxes exhibits several unique characteristics: Complex frequency components, low signal-to-noise ratio, and weak fault feature. In this sense, the periodic impulsive components induced by a localized defect are hard to extract, and the fault detection of planet gear in wind turbines remains to be a challenging research work. Aiming to extract the fault feature of planet gear effectively, we propose a novel feature extraction method based on spectral kurtosis and time wavelet energy spectrum (SK-TWES) in the paper. Firstly, the spectral kurtosis (SK) and kurtogram of raw vibration signals are computed and exploited to select the optimal filtering parameter for the subsequent band-pass filtering. Then, the band-pass filtering is applied to extrude periodic transient impulses using the optimal frequency band in which the corresponding SK value is maximal. Finally, the time wavelet energy spectrum analysis is performed on the filtered signal, selecting Morlet wavelet as the mother wavelet which possesses a high similarity to the impulsive components. The experimental signals collected from the wind turbine gearbox test rig demonstrate that the proposed method is effective at the feature extraction and fault diagnosis for the planet gear with a localized defect.
关键词: wind turbine planet gear fault feature extraction spectral kurtosis time wavelet energy spectrum
Experimental investigation of fatigue behavior of spur gear in altered tooth-sum gearing
H. K. SACHIDANANDA, Joseph GONSALVIS, H. R. PRAKASH
《机械工程前沿(英文)》 2012年 第7卷 第3期 页码 268-278 doi: 10.1007/s11465-012-0331-6
This paper deals with the contact stress, power loss, and pitting of spur gear tooth in altered tooth-sum gearing for a tooth-sum of 100 teeth when altered by±4% tooth-sum. Analytical and experimental methods were performed to investigate and compare the altered tooth-sum gearing against the standard tooth-sum gearing. The experiments were performed using a power recirculating type test rig. The tooth loads for the experimental investigations were determined considering the surface durability of gears. A clear picture of the surface damage was obtained using a scanning electron microphotograph. The negative alteration in the tooth-sum performed better than the positive alteration in a tooth-sum operating between specified center distances.
关键词: spur gear power recirculating test rig altered tooth-sum gearing scanning electron microscopy (SEM)
Mesh relationship modeling and dynamic characteristic analysis of external spur gears with gear wear
《机械工程前沿(英文)》 2022年 第17卷 第1期 页码 9-9 doi: 10.1007/s11465-021-0665-z
关键词: gear wear mesh relationship mesh stiffness transmission error vibration characteristics
Zhenyun DUAN, Houjun CHEN, Zhilan JU, Jian LIU
《机械工程前沿(英文)》 2012年 第7卷 第3期 页码 312-321 doi: 10.1007/s11465-012-0308-5
In this paper, loxodromic-type normal circular-arc spiral bevel gear is proposed as a novel application of the circular-arc tooth profile at the gear transmission with intersecting axes. Based on the principle of molding-surface conjugation, the study develops a mathematical model for the tooth alignment curve and the computational flow at the design stage to enable the generation of the tooth surface. Machining of the tooth surface is then carried out to determine the interference-free tool path of the numerical control (NC). Moreover, a pair of loxodromic-type normal circular-arc spiral bevel gears is manufactured on computer numerical control (CNC) machine tools. The proposed theory and method are experimentally investigated, and the obtained results primarily reflect the superior performance of the proposed novel gear.
关键词: loxodrome circular-arc tooth profile Wildhaber-Novikov (W-N) gear spiral bevel gear
Design optimization of a wind turbine gear transmission based on fatigue reliability sensitivity
Genshen LIU, Huaiju LIU, Caichao ZHU, Tianyu MAO, Gang HU
《机械工程前沿(英文)》 2021年 第16卷 第1期 页码 61-79 doi: 10.1007/s11465-020-0611-5
关键词: gear transmission fatigue reliability reliabi-lity sensitivity parameter optimization
Contact fatigue life prediction of a bevel gear under spectrum loading
Pan JIA, Huaiju LIU, Caichao ZHU, Wei WU, Guocheng LU
《机械工程前沿(英文)》 2020年 第15卷 第1期 页码 123-132 doi: 10.1007/s11465-019-0556-8
关键词: bevel gear rolling contact fatigue (RCF) multiaxial fatigue criterion load spectrum damage accumulation rule
Analysis of planetary gear transmission in non-stationary operations
Fakher CHAARI, Mohamed Slim ABBES, Fernando Viadero RUEDA, Alfonso Fernandez del RINCON, Mohamed HADDAR
《机械工程前沿(英文)》 2013年 第8卷 第1期 页码 88-94 doi: 10.1007/s11465-013-0361-8
Planetary gearboxes operate usually in non-stationary conditions generated mainly by variable loads applied to these transmissions. In order to understand the dynamic behavior of planetary gearboxes in such conditions, a mathematic model is developed including driving unit, transmission and load. The variability of load induces a variable speed of the transmission which is taken into account when characterizing the main dynamic parameter of the transmission which is the mesh stiffness function. This function is not periodic following the variability of the transmission speed. The computation of the dynamic response shows an intimate relation between the vibration amplitude level and the load value. As the load increase the vibration level increase. A combined amplitude and frequency modulation is observed which is well characterized using Short Time Fourier transform more suited than the spectral analysis.
关键词: planetary gearbox non-stationary conditions variable load dynamic response time frequency analysis
应富强,潘孝勇,李敏
《中国工程科学》 2007年 第9卷 第7期 页码 47-52
楔横轧齿轮轧制成形是一个全新的课题,在轧制过程中轧件的变形、温度场及力能参数都有待研究。将楔横轧技术与齿轮范成加工原理相结合,设计了楔横轧齿轮轧制的模具,给出了楔横轧齿轮轧制成形热力耦合本构模型,并在SuperForm平台对轧制成形过程进行了有限元模拟,获得了轧件在成形过程中的变形规律、温度场分布及力能参数变化等数据,详细分析了数值模拟结果,为进一步研究齿轮楔横轧制坯提供参考。
梁桂明
《中国工程科学》 2001年 第3卷 第7期 页码 70-78
曲线齿锥齿轮和准双曲面齿轮(统称为“泛曲线齿锥齿轮”),是一种十分复杂而应用越来越广泛的传动装置。在设计上为了避免改变轴交角,而采用"零"变位传动(x1+x2=0)设计的齿形制,至今已在各国工业上通用近百年。文章介绍一种"非零"变位传动(x1+x2≠0)设计而又保持轴交角不变的创新齿形制。为了满足生产提出的要求,进行了二次开发。经过第二次创新,能在普通锥齿轮加工机床和刀具上切齿,故极易推广。近12年来,已成功地在工程机械、军品、立式机床、机车、船艇、油田、采煤、水泥等机械上采用,取得高综合强度、高可靠性、长寿命、小体积、低噪声、广泛适应性等优点,可取代(或覆盖)全部以美国Gleason为代表的零传动齿制设计的产品,还可实现某些Gleason所达不到的技术要求,故有广泛的应用前景。
Effect of friction coefficients on the dynamic response of gear systems
Lingli JIANG, Zhenyong DENG, Fengshou GU, Andrew D. BALL, Xuejun LI
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 397-405 doi: 10.1007/s11465-017-0415-4
The inevitable deterioration of the lubrication conditions in a gearbox in service can change the tribological properties of the meshing teeth. In turn, such changes can significantly affect the dynamic responses and running status of gear systems. This paper investigates such an effect by utilizing virtual prototype technology to model and simulate the dynamics of a wind turbine gearbox system. The change in the lubrication conditions is modeled by the changes in the friction coefficients, thereby indicating that poor lubrication causes not only increased frictional losses but also significant changes in the dynamic responses. These results are further demonstrated by the mean and root mean square values calculated by the simulated responses under different friction coefficients. In addition, the spectrum exhibits significant changes in the first, second, and third harmonics of the meshing components. The findings and simulation method of this study provide theoretical bases for the development of accurate diagnostic techniques.
关键词: dynamic response friction coefficient wind loads wind turbine gearbox
王裕清,梁剑
《中国工程科学》 2001年 第3卷 第12期 页码 68-70
曲面上点的主曲率计算是确定轮齿啮合压痕平面投影形状的关键。文章摈弃通常运用啮合原理和坐标变换计算的思路,从曲面本身的性质出发,把幺正活动标架和外微分引入主曲率计算,得到简明、有效的主曲率计算的新算法,并结合压痕公式给出了一个应用实例。该算法可以推广到任意曲面的主曲率计算。
标题 作者 时间 类型 操作
High-precision gyro-stabilized control of a gear-driven platform with a floating gear tension device
期刊论文
Gear fault diagnosis using gear meshing stiffness identified by gearbox housing vibration signals
期刊论文
Russian school of the theory and geometry of gearing: Its origin and golden period (1935 --1975)
Dmitry BABICHEV,Sergey LAGUTIN,Natalya BARMINA
期刊论文
Fault feature extraction of planet gear in wind turbine gearbox based on spectral kurtosis and time wavelet
Yun KONG, Tianyang WANG, Zheng LI, Fulei CHU
期刊论文
Experimental investigation of fatigue behavior of spur gear in altered tooth-sum gearing
H. K. SACHIDANANDA, Joseph GONSALVIS, H. R. PRAKASH
期刊论文
Mesh relationship modeling and dynamic characteristic analysis of external spur gears with gear wear
期刊论文
Mathematical model and manufacture programming of loxodromic-type normal circular-arc spiral bevel gear
Zhenyun DUAN, Houjun CHEN, Zhilan JU, Jian LIU
期刊论文
Design optimization of a wind turbine gear transmission based on fatigue reliability sensitivity
Genshen LIU, Huaiju LIU, Caichao ZHU, Tianyu MAO, Gang HU
期刊论文
Contact fatigue life prediction of a bevel gear under spectrum loading
Pan JIA, Huaiju LIU, Caichao ZHU, Wei WU, Guocheng LU
期刊论文
Analysis of planetary gear transmission in non-stationary operations
Fakher CHAARI, Mohamed Slim ABBES, Fernando Viadero RUEDA, Alfonso Fernandez del RINCON, Mohamed HADDAR
期刊论文
Effect of friction coefficients on the dynamic response of gear systems
Lingli JIANG, Zhenyong DENG, Fengshou GU, Andrew D. BALL, Xuejun LI
期刊论文