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Nanjing: Gearing Up for the Overseas Chinese Entrepreneurs Convention
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《China's Foreign Trade》 2001年第5期16-16,共1页
关键词 OFFICE gearing up for the Overseas Chinese Entrepreneurs Convention NANJING
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On-line Advertising Gearing up
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《China's Foreign Trade》 2000年第5期46-46,共1页
关键词 LINE On-line Advertising gearing up
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Gearing Up for the Fair——Promoters are attracting overseas attention to the upcoming annual international investment and trade fair in Xiamen,southeast China
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《Beijing Review》 2006年第24期38-39,共2页
Among Chinese men who wear suits and shirts, few are unfamiliar with Youngor, one of the most famous garment brands in China. When it was founded in 1979, the Youngor Group, based in Ningbo, Zhejiang Province, was jus... Among Chinese men who wear suits and shirts, few are unfamiliar with Youngor, one of the most famous garment brands in China. When it was founded in 1979, the Youngor Group, based in Ningbo, Zhejiang Province, was just a private factory with a few hundred workers. Now it has grown into a leading company in China's garment industry, with more than 20,000 employees and net assets of over 5 billion yuan. It ranks 144th among China's top 500 enterprises. Zhong Leiming, Chief Supervisor of the group, and Yu Cheng, Manager of the Publicity Department, discussed the company's operating strategy in a recent interview with Beijing Review. 展开更多
关键词 Promoters are attracting overseas attention to the upcoming annual international investment and trade fair in Xiamen southeast C In gearing up for the Fair UNIDO
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Sheet Bulk Forming of Thin-Walled Components with External Gearing through Upsetting Using Controllable Deformation Zone Method 被引量:1
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作者 Xincun Zhuang Meile Liang +2 位作者 Shengfa Zhu Yin Zhu Zhen Zhao 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2021年第5期282-295,共14页
Sheet-bulk metal forming(SBMF)is a promising process for manufacturing complex sheet components with functional elements.In this study,the entire forming process for a typical thin-walled component with external geari... Sheet-bulk metal forming(SBMF)is a promising process for manufacturing complex sheet components with functional elements.In this study,the entire forming process for a typical thin-walled component with external gearing is investigated,including sheet forming and bulk forming processes.Deep drawn cups are prepared during sheet forming;subsequently,upsetting is performed on the sidewall to form external gearing.The upsetting method performed is known as upsetting with a controllable deformation zone(U-CDZ).Compared with the conventional upsetting method,a floating counter punch with a counter force is used in the U-CDZ method such that the forming mechanism is changed into the accumulation of the deformation zone instead of deformation throughout the entire sidewall.The effects of the counter force and material flow are investigated to understand the mechanism.The forming quality,i.e.,the formfilling and effective strain distribution,improved,whereas a high forming load is avoided.In addition,a punch with a lock bead is used to prevent folding at the inner corner during the experiment. 展开更多
关键词 Sheet-bulk metal forming Thin-walled components External gearing Controllable deformation zone
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Gearing Up for Growth
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作者 Zhang Shasha 《Beijing Review》 2019年第8期36-37,共2页
New-energy vehicles gain momentum in China’s auto market In the Zhongnanhai leadership compound in central Beijing,three handsome cars owned by Elon Musk CEO of Tesla Inc.,were parked.The U.S.
关键词 gearing up for GROWTH
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通向未来的护照——美国加州圣荷塞“Gear up工程”述评 被引量:3
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作者 傅松涛 郭徽 +1 位作者 耿兆辉 孟红艳 《河北大学学报(哲学社会科学版)》 CSSCI 北大核心 2007年第4期42-48,共7页
由加利福尼亚圣荷塞州立大学牵头设计实施的"通向未来的护照"项目,是美国教育部Gear up教育创新工程的一个有代表性的地方规划实施模式。本文对工程的立项背景、目标内容、运作过程和结果影响等方面进行了完整的个案研究,为... 由加利福尼亚圣荷塞州立大学牵头设计实施的"通向未来的护照"项目,是美国教育部Gear up教育创新工程的一个有代表性的地方规划实施模式。本文对工程的立项背景、目标内容、运作过程和结果影响等方面进行了完整的个案研究,为我们系统地了解和借鉴整个Gear up工程的合作伙伴运作模式提供了一个比较完整的模本。 展开更多
关键词 美国 GEAR up 通向未来的护照 工程项目 合作伙伴
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Design of Vegetable Pot Seedling Pick‑up Mechanism with Planetary Gear Train 被引量:9
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作者 Zhipeng Tong Gaohong Yu +2 位作者 Xiong Zhao Pengfei Liu Bingliang Ye 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2020年第4期87-97,共11页
It has been challenging to design seedling pick-up mechanism based on given key points and trajectories,because it involves dimensional synthesis and rod length optimization.In this paper,the dimensional synthesis of ... It has been challenging to design seedling pick-up mechanism based on given key points and trajectories,because it involves dimensional synthesis and rod length optimization.In this paper,the dimensional synthesis of seedling pickup mechanism with planetary gear train was studied based on the data of given key points and the trajectory of the endpoint of seedling pick-up mechanism.Given the positions and orientations requirements of the five key points,the study first conducted a dimensional synthesis of the linkage size and center of rotation.The next steps were to select a reasonable solution and optimize the data values based on the ideal seedling trajectory.The link motion was driven by the planetary gear train of the two-stage gear.Four pitch curves of noncircular gears were obtained by calculating and distributing the transmission ratio according to the data.For the pitch curve with two convex points,the tooth profile design method of incomplete noncircular gear was applied.The seedling pick-up mechanism was tested by a virtual prototype and a physical prototype designed with the obtained parameter values.The results were consistent with the theoretical design requirements,confirming that the mechanism meets the expected requirements for picking seedlings up.This paper presents a new design method of vegetable pot seedling pick-up mechanism for an automatic vegetable transplanter. 展开更多
关键词 Combined incomplete noncircular gear Mechanism dimension synthesis Planetary gear train Seedling pick-up mechanism
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Design and Experimental Research on Seedling Pick-Up Mechanism of Planetary Gear Train with Combined Non-circular Gear Transmission 被引量:11
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作者 Yaxin Yu Jikun Liu +4 位作者 Bingliang Ye Gaohong Yu Xuejun Jin Liang Sun Junhua Tong 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2019年第3期42-54,共13页
Currently, transplanting mechanisms for dryland plug seedlings in China are mainly semiautomatic and have low efficiency. The rotary seedling pick-up mechanism with a planetary gear train for non-uniform intermittent ... Currently, transplanting mechanisms for dryland plug seedlings in China are mainly semiautomatic and have low efficiency. The rotary seedling pick-up mechanism with a planetary gear train for non-uniform intermittent transmission, and a concave and convex locking arc device, has a large rigid impact. To solve these problems, according to the design requirements for a dryland plug seedling transplanting mechanism, a rotary seedling pick-up mechanism of a planetary gear train with combined non-circular gear transmission of incomplete eccentric circular and noncircular gears was proposed. This has the characteristics of two-times greater fluctuation of the transmission ratio in a cycle, and can achieve a non-uniform continuous drive. Through analysis of the working principle of the seedling pick-up mechanism, its kinematics model was established. The human–computer interaction optimization method and self-developed computer-aided analysis and optimization software were used to obtain a set of parameters that satisfy the operation requirements of the seedling pick-up mechanism. According to the optimized parameters, the structure of the seedling pick-up mechanism was designed, a virtual prototype of the mechanism was created, and a physical prototype was manufactured. A virtual motion simulation of the mechanism was performed, high-speed photographic kinematics tests were conducted, and the kinematic properties of the physical prototype were investigated, whereby the correctness of the theoretical model and the optimized design of the mechanism were verified. Further, laboratory seedling pick-up tests were conducted. The success ratio of seedling pick-up was 93.8% when the seedling pick-up efficiency of the mechanism was 60 plants per minute per row, indicating that the mechanism has a high efficiency and success ratio for seedling pick-up and can be applied to a dryland plug seedling transplanter. 展开更多
关键词 Dryland plug SEEDLING transplanter Rotary SEEDLING PICK-up MECHANISM TRANSMISSION ratio Non-uniform continuous TRANSMISSION COMBINED NON-CIRCULAR gear TRANSMISSION Optimization design
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Tooth surface geometry optimization of spiral bevel and hypoid gears generated by duplex helical method with circular profile blade 被引量:12
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作者 张宇 严宏志 +1 位作者 曾韬 曾亦愚 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第3期544-554,共11页
In order to effectively improve meshing performance of spiral bevel and hypoid gears generated by the duplex helical method, the effects of straight lined and circular cutting edges profile on meshing and contact of s... In order to effectively improve meshing performance of spiral bevel and hypoid gears generated by the duplex helical method, the effects of straight lined and circular cutting edges profile on meshing and contact of spiral bevel and hypoid gears were investigated analytically. Firstly, a mathematical model of spiral bevel and hypoid gears with circular blade profile was established according to the cutting characteristics of the duplex helical method. Based on a hypoid gear drive, the tooth bearings and the functions of transmission errors of four design cases were analyzed respectively by the use of the tooth contact analysis(TCA), and the contact stresses of the four design cases were analyzed and compared using simulation software. Finally, the curvature radius of the circular profile blade was optimized. The results show that the contact stresses are availably reduced, and the areas of edge contact and severe contact stresses can be avoided by selecting appropriate circular blade profile. In addition, the convex and concave sides are separately modified by the use of different curvature radii of inside and outside blades, which can increase the flexibility of the duplex helical method. 展开更多
关键词 circular blade profile duplex helical method spiral bevel and hypoid gears modification contact stress
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Influence of support stiffness on vibrations of a planet gear system considering ring with flexible support 被引量:5
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作者 LIU Jing PANG Rui-kun +1 位作者 LI Hong-wu XU Jin 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第8期2280-2290,共11页
Planet gear systems(PGSs)are key components of transmission mechanisms.Structural and material characteristics of gearbox and shaft can affect the support stiffness and vibrations of PGSs.The ring gear flexibility sho... Planet gear systems(PGSs)are key components of transmission mechanisms.Structural and material characteristics of gearbox and shaft can affect the support stiffness and vibrations of PGSs.The ring gear flexibility should affect the vibrations of PGSs too.However,most previous work did not completely consider the effects of the ring gear flexibility on the vibrations of PGSs and flexible supports of ring and sun gears.Thus,this paper presents a flexible-rigid coupling multi-body dynamic(FMBD)model for a PGS with the flexible supports and ring gear flexibility.A finite element model of ring gear is established to formulate the ring gear flexibility.The influences of clearance and damping of planet bearings on the vibrations of PGS are considered.The effects of flexible supports and ring gear flexibility on the vibrations of PGS under different moment and speed conditions are studied.The statistical parameters and peak frequencies of PGS from the proposed FMBD and previous rigid multi-body dynamic(RMBD)models are compared.The results denote that the flexible support has a great effect on the vibrations of PGS.This paper can provide some guidance for the support structure design and vibration control for PGSs. 展开更多
关键词 planet gear flexible-rigid coupling flexible supports ring gear flexibility vibrations
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CLASSIFICATION OF GEAR FAULTS USING HIGHER-ORDER STATISTICS AND SUPPORT VECTOR MACHINES 被引量:6
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作者 Lai Wuxing Zhang Guicai Shi Tielin Yang ShuziSchool of Mechanical Science and Engineering, Huazhong University of Science and Technology,Wuhan 430074, China 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2002年第3期243-247,共5页
Gears alternately mesh and detach in driving process, and then workingconditions of gears are alternately changing, so they are easy to be spalled and worn. But becauseof the effect of additive gaussian measurement no... Gears alternately mesh and detach in driving process, and then workingconditions of gears are alternately changing, so they are easy to be spalled and worn. But becauseof the effect of additive gaussian measurement noises, the signal-to-noises ratio is low; theirfault features are difficult to extract. This study aims to propose an approach of gear faultsclassification, using the cumulants and support vector machines. The cumulants can eliminate theadditive gaussian noises, boost the signal-to-noises ratio. Generalisation of support vectormachines as classifier, which is employed structural risk minimisation principle, is superior tothat of conventional neural networks, which is employed traditional empirical risk minimisationprinciple. Support vector machines as the classifier, and the third and fourth order cumulants asinput, gears faults are successfully recognized. The experimental results show that the method offault classification combining cumulants with support vector machines is very effective. 展开更多
关键词 Support vector machine GEAR Fault diagnosis CUMULANT FEATUREEXTRACTION
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Analysis of the Meshing of Crown Gear Coupling 被引量:8
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作者 易传云 《Journal of Shanghai University(English Edition)》 CAS 2005年第6期527-533,共7页
This paper presents an analysis result of three-dimensional meshing of crown gear coupling (CGC) surfaces of crown gear and internal gear are established. The equation of internal gear surface is given. The equation... This paper presents an analysis result of three-dimensional meshing of crown gear coupling (CGC) surfaces of crown gear and internal gear are established. The equation of internal gear surface is given. The equation of conjugate surface of crown gear is solved according to the principle of gearing, and that of non-conjugate crown gear is derived with crown curve of a circular arc. The meshing state of conjugate and non-conjugate surfaces is analyzed through computation of contact lines and points. It is concluded that the meshing of conjugate CGC is line-contact, there are several pairs of teeth engage simultaneously, and non-conjugate CGC has point-contact condition of meshing and only 2 pairs of teeth engage in theory. 展开更多
关键词 kinematic analysis crown gear coupling MESHING
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Bifurcation and chaos study on transverse-torsional coupled 2K-H planetary gear train with multiple clearances 被引量:4
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作者 盛冬平 朱如鹏 +2 位作者 靳广虎 陆凤霞 鲍和云 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第1期86-101,共16页
A new non-linear transverse-torsional coupled model was proposed for 2K-H planetary gear train, and gear's geometric eccentricity error, comprehensive transmission error, time-varying meshing stiffness, sun-planet... A new non-linear transverse-torsional coupled model was proposed for 2K-H planetary gear train, and gear's geometric eccentricity error, comprehensive transmission error, time-varying meshing stiffness, sun-planet and planet-ring gear pair's backlashes and sun gear's bearing clearance were taken into consideration. The solution of differential governing equation of motion was solved by applying variable step-size Runge-Kutta numerical integration method. The system motion state was investigated systematically and qualitatively, and exhibited diverse characteristics of bifurcation and chaos as well as non-linear behavior under different bifurcation parameters including meshing frequency, sun-planet backlash, planet-ring backlash and sun gear's bearing clearance. Analysis results show that the increasing damping could suppress the region of chaotic motion and improve the system's stability significantly. The route of crisis to chaotic motion was observed under the bifurcation parameter of meshing frequency. However, the routes of period doubling and crisis to chaos were identified under the bifurcation parameter of sun-planet backlash; besides, several different types of routes to chaos were observed and coexisted under the bifurcation parameter of planet-ring backlash including period doubling, Hopf bifurcation, 3T-periodic channel and crisis. Additionally, planet-ring backlash generated a strong coupling effect to system's non-linear behavior while the sun gear's bearing clearance produced weak coupling effect. Finally, quasi-periodic motion could be found under all above–mentioned bifurcation parameters and closely associated with the 3T-periodic motion. 展开更多
关键词 planetary gear train BIFURCATION CHAOS transverse-torsional coupling BACKLASH bearing clearance
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Super-harmonic resonance of gear transmission system under stick-slip vibration in high-speed train 被引量:4
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作者 HUANG Guan-hua XU Si-si +1 位作者 ZHANG Wei-hua YANG Cai-jin 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第3期726-735,共10页
This work deals with super-harmonic responses and the stabilities of a gear transmission system of a high-speed train under the stick-slip oscillation of the wheel-set.The dynamic model of the system is developed with... This work deals with super-harmonic responses and the stabilities of a gear transmission system of a high-speed train under the stick-slip oscillation of the wheel-set.The dynamic model of the system is developed with consideration on the factors including the time-varying system stiffness,the transmission error,the tooth backlash and the self-excited excitation of the wheel-set.The frequency-response equation of the system at super-harmonic resonance is obtained by the multiple scales method,and the stabilities of the system are analyzed using the perturbation theory.Complex nonlinear behaviors of the system including multi-valued solutions,jump phenomenon,hardening stiffness are found.The effects of the equivalent damping and the loads of the system under the stick-slip oscillation are analyzed.It shows that the change of the load can obviously influence the resonance frequency of the system and have little effect on the steady-state response amplitude of the system.The damping of the system has a negative effect,opposite to the load.The synthetic damping of the system composed of meshing damping and equivalent damping may be less than zero when the wheel-set has a large slippage,and the system loses its stability owing to the Hopf bifurcation.Analytical results are validated by numerical simulations. 展开更多
关键词 stick-slip vibration super-harmonic resonance Hopf bifurcation gear transmission system high-speed train
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Experimental study on vibration suppression of gear shaft misalignment with ISFD 被引量:8
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作者 Lu Kaihua He Lidong +2 位作者 Zhang Yipeng Chen Zhao Yan Wei 《High Technology Letters》 EI CAS 2019年第1期17-27,共11页
Misalignment faults in gear systems lead to violent vibration and noise, shortening the life of equipment. The aim of this work is the demonstration of vibration suppression of parallel-misaligned gear shafts using an... Misalignment faults in gear systems lead to violent vibration and noise, shortening the life of equipment. The aim of this work is the demonstration of vibration suppression of parallel-misaligned gear shafts using an integral squeeze film damper(ISFD). Using a first grade spur gear in engineering for reference, an open first-grade spur gear system is built and the vibration characteristics of the gear system with rigid supports and ISFD elastic damping supports are studied under different degrees of misalignment. The experimental results show that ISFD supports have excellent damping and vibration attenuation characteristics, which have improved control of the gear system vibration in horizontal, vertical and axial directions under different degrees of misalignment. This work shows that an ISFD structure can effectively suppress vibration of characteristic frequency components and resonance modulation frequency components. The test results provide evidence for the application of ISFD in vibration control of gear shaft misalignment faults in engineering. 展开更多
关键词 gear shaft parallel misalignment integral squeeze film damper(ISFD) vibration suppression
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Tooth surface error correction of hypoid gears machined by duplex helical method 被引量:6
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作者 WU Shun-xing YAN Hong-zhi +3 位作者 WANG Zhi-yong BI Ren-gui CHEN Zhi ZHU Peng-fei 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第5期1402-1411,共10页
In this work,synchronous cutting of concave and convex surfaces was achieved using the duplex helical method for the hypoid gear,and the problem of tooth surface error correction was studied.First,the mathematical mod... In this work,synchronous cutting of concave and convex surfaces was achieved using the duplex helical method for the hypoid gear,and the problem of tooth surface error correction was studied.First,the mathematical model of the hypoid gears machined by the duplex helical method was established.Second,the coordinates of discrete points on the tooth surface were obtained by measurement center,and the normal errors of the discrete points were calculated.Third,a tooth surface error correction model is established,and the tooth surface error was corrected using the Levenberg-Marquard algorithm with trust region strategy and least square method.Finally,grinding experiments were carried out on the machining parameters obtained by Levenberg-Marquard algorithm with trust region strategy,which had a better effect on tooth surface error correction than the least square method.After the tooth surface error is corrected,the maximum absolute error is reduced from 30.9μm before correction to 6.8μm,the root mean square of the concave error is reduced from 15.1 to 2.1μm,the root mean square of the convex error is reduced from 10.8 to 1.8μm,and the sum of squared errors of the concave and convex surfaces was reduced from 15471 to 358μm^(2).It is verified that the Levenberg-Marquard algorithm with trust region strategy has a good accuracy for the tooth surface error correction of hypoid gear machined by duplex helical method. 展开更多
关键词 duplex helical method hypoid gear error measurement Levenberg–Marquard algorithm with trust region strategy correction of tooth surface error
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Load Sharing Behavior of Star Gearing Reducer for Geared Turbofan Engine 被引量:2
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作者 Shuai MO Yidu ZHANG +3 位作者 Qiong WU Feiming WANG Shigeki MATSUMURA Haruo HOUJOH 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2017年第4期796-803,共8页
Load sharing behavior is very important for power-split gearing system, star gearing reducer as a new type and special transmission system can be used in many industry fields. However, there is few literature regardin... Load sharing behavior is very important for power-split gearing system, star gearing reducer as a new type and special transmission system can be used in many industry fields. However, there is few literature regarding the key multiple-split load sharing issue in main gearbox used in new type geared turbofan engine. Further mechanism anal- ysis are made on load sharing behavior among star gears of star gearing reducer for geared turbofan engine. Compre- hensive meshing error analysis are conducted on eccentricity error, gear thickness error, base pitch error, assembly error, and bearing error of star gearing reducer respectively. Floating meshing error resulting from meshing clearance variation caused by the simultaneous floating of sun gear and annular gear are taken into account. A refined mathematical model for load sharing coefficient calculation is established in consideration of different meshing stiffness and support- ing stiffness for components. The regular curves of load sharing coefficient under the influence of interactions, single action and single variation of various component errors are obtained. The accurate sensitivity of load sharing coefficienttoward different errors is mastered. The load sharing coef- ficient of star gearing reducer is 1.033 and the maximum meshing force in gear tooth is about 3010 N. This paper provides scientific theory evidences for optimal parameter design and proper tolerance distribution in advanced devel- opment and manufacturing process, so as to achieve optimal effects in economy and technology. 展开更多
关键词 Geared turbofan engine GTF engineAero-turbofan engine Star gearing reducer Load sharing behavior
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Translational - torsional coupled model based nonlinear dynamic analysis of an NGW planetary gear train 被引量:2
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作者 刘振州 张俊 BIAN Shi-yuan 《Journal of Chongqing University》 CAS 2016年第4期159-167,共9页
This paper aims to investigate the nonlinear dynamic behaviors of an NGW planetary gear train with multi-clearances and manufacturing/assembling errors. For this purpose, an analytical translational- torsional coupled... This paper aims to investigate the nonlinear dynamic behaviors of an NGW planetary gear train with multi-clearances and manufacturing/assembling errors. For this purpose, an analytical translational- torsional coupled dynamic model is developed considering the effects of time-varying stiffness, gear backlashes and component errors. Based on the proposed model, the nonlinear differential equations of motion are derived and solved iteratively by the Runge-Kutta method. An NGW planetary gear reducer with three planets is taken as an example to analyze the effects of nonlinear factors. The results indicate that the backlashes induce complicated nonlinear dynamic behaviors in the gear train. With the increment of the backlashes, the gear system has experienced periodic responses, quasi-periodic response and chaos responses in sequence. When the planetary gear system is in a chaotic motion state, the vibration amplitude increases sharply, causing severe vibration and noise. The present study provides a fundamental basis for design and parameter optimization of NGW planetary gear trains. 展开更多
关键词 NGW PLANETARY GEAR train time-varying stiffness nonlinear dynamic model GEAR BACKLASH RUNGE-KUTTA method
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Backlash analysis of a new planetary gearing with internal gear ring 被引量:2
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作者 朱才朝 肖宁 《Journal of Chongqing University》 CAS 2010年第3期151-158,共8页
Due to low carrying capacity and short life of current ring reducer,we proposed a new planetary gearing with internal gear ring,which consisted of two stages.One was an involute planetary drive and the other was an N-... Due to low carrying capacity and short life of current ring reducer,we proposed a new planetary gearing with internal gear ring,which consisted of two stages.One was an involute planetary drive and the other was an N-type planetary drive with small teeth difference.The kinematic calculation was conducted based on the analysis of structural composition and working principle.Formulas of backlash calculation for the new planetary gearing were derived by using probabilistic theory and the analytical model was created at the same time.Then,main factors that affect the systematic backlash were introduced and the effects of manufacture error,misaligments and roller bearing parameters on the distribution of backlash were presented.The influence of gear backlash on systematic return difference was performed based on the backlash mathematic model proposed.The results show that the backlash is a little large,of which the backlash of bearing takes a greater part than two gearing stages.So we presented some practical methods to reduce the systematic backlash. 展开更多
关键词 planetary gearing with intemal gear ring probabilistic theory return difference gear backlash
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EFFECT OF GEAR WIDTH AND HELIX ANGLE ON FACTOR OF DYNAMIC LOAD OF DOUBLE CIRCULAR ARC HELICAL GEARING 被引量:1
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作者 WuBaolin 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2004年第3期353-355,共3页
Based on theory of mechanical dynamics, meshing characteristic as well as thedynamic model of double circular arc helical gearing, an analysis approach and a computer programhave been developed for studying the state ... Based on theory of mechanical dynamics, meshing characteristic as well as thedynamic model of double circular arc helical gearing, an analysis approach and a computer programhave been developed for studying the state of dynamic load and factor of dynamic load of thegearing, the changing situation of dynamic load and dynamic load factor vs some affecting factorssuch as gear width, helix angle and accuracy grade etc are investigated. A series of conclusions areobtained: ①With the increasing in the values of gear width, the dynamic load factor appears slowdecreasing tendency in most region of gear width. ②When the accuracy grades of the gearing areimproved, the values of dynamic load factor decrease. ③The value of dynamic load factor appears adecreasing tendency with the increasing of value of helix angle at the same ratio of criticalrotational speed. 展开更多
关键词 Double circular arc helical gearing (W-N gearing) Factor of dynamic load Helix angle Gear width
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