最新刊期
期 2 ， 2016
- 摘要：On the consideration of the existing tooth surface modification technology of spiral bevel gear limited to special milling tooth machine,a kind of tooth surface modification method based on the machining center is put forward. Based on the forming machining method of spiral bevel gear,the pinion tooth surface equation is derived by using the conjugate principle,and the amount of modification is added to discrete points by applying the differential curved surface equation. The digital gear tooth surface of the pinion is obtained by the NURBS surface meshing,which is analyzed with the theoretical tooth surface of the gear. The cutting experiment on machining center is performed on the machining center,and the rolling test experiments show that the tooth contact area and the simulation results mainly agreed. The feasibility of the modification method proposed is verified,which provides the technical support for the spiral bevel gear tooth being processed on machining center and the control of the meshing quality.关键词：Spiral bevel gear;Modification;TCA;NURBS;Machining center
- 5
- |
- 243
- |
- 4
发布时间：2022-10-20 - 摘要：In order to study the temperature rise characteristic of clutch pressure plate under different engagement displacement. Firstly,the heat transfer mechanism of pressure plate is analyzed and its thermal boundary condition is determined. Then,by using the CATIA,a 3D model of the clutch pressure plate is set up,and the mesh generation of the 3D model is carried out by using the ANSYS. On this basis,by using the ANSYS,the clutch pressure plate temperature rise characteristic is calculated,the regularities of temperature field distribution and temperature rise characteristics under different engagement displacement are got. Finally,the test verification of the simulation result is carried out by using the clutch comprehensive performance test rig.关键词：Clutch;Pressure plate;Engagement displacement;Temperature rise characteristics;Temperature field;Experiment
- 2
- |
- 136
- |
- 5
发布时间：2022-10-20 - 摘要：Taking a centralized drive electric vehicle power train as study object,considering the influence of coolant and lubricating oil,the fluid- structure model is established. The modal and vibration response of the model is researched. First,the fluid- structure model is proved to be correct by comparing its simulation result with the experimental result. Then,other two kinds of fluid- structure model,each one of which involved one kind of fluid,are established. The different influence degree of these two kinds of fluid on the model natural frequency is analyzed through modal simulation. At last,the power train vibration response under electromagnetic excitation is obtained by simulation,and it is compared with the result of the original model. The result indicates,that various dynamics phenomenon are showed by the model which considering the fluid- structure model with coolant,lubricating oil and mechanical components and the foundation for the subsequent optimization design is provided.关键词：Power train;Fluid-structure coupling;Modal analysis;Vibration response
- 3
- |
- 246
- |
- 1
发布时间：2022-10-20 - 摘要：For the dual- cavity half toroidal continuously variable transmission mechanism composed of half toroidal continuously variable unit（ CVU）,the fixed- axis gear train and the double- row differential gear train,the condition of the transmission ratio of the fixed- axis gear train and the speed ratio of the shifting mechanism on the double- row differential gear train must meet are analyzed under high torque transmission and power split. The expressions for the ratio of the power through half toroidal CVU to the input power and for the transmission efficiency of the mechanism are derived under power split. Whether the transmission ratio of the fixed- axis gear train decreases or the speed ratio of the shifting mechanism on the double- row differential gear train reduces,the ratio value of the power through half toroidal CVU to the input power reduce and the transmission efficiency increases. Finally,the example demonstrated the influence of the transmission ratio change of the fixed- axis gear train and the speed ratio change of the shifting mechanism of the double- row differential gear train on the ratio value of the power through half toroidal CVU to the input power and the transmission efficiency of the mechanism.关键词：Continuously variable transmission;High torque transmission;Power split;Transmission efficiency
- 4
- |
- 71
- |
- 1
发布时间：2022-10-20 -
Analysis of the Bifurcation and Theory Vibration of the Gear Transmission System based on the MATLAB
摘要：Based on the consideration of various parts of spur gear,the three degree of freedom dynamics model of gear transmission system is established. With the help of the mathematical software MATLAB,the gear dynamics equation constructed by using the Runge- kutta method is solved,the dynamics response curve is got,and the bifurcation and stability of the gear transmission system under different excitation frequency are analyzed. Through the analysis found the complex bifurcation structure and general rule are exist in the strongly nonlinear gear system,a reference for further study of gear system nonlinear dynamics is provided.关键词：Gear transmission system;Bifurcation diagram;Matlab;Nonlinear dynamics- 3
- |
- 450
- |
- 1
发布时间：2022-10-20 - 摘要：In order to solve the problems of difficult arrangement,high production cost of drilling automation platform transmission system in the heavy duty condition,a new CVT system of drilling automation platform is introduced by analyzing the new type layout scheme of CVT structure,working principle and key performance indicators,and the influence of the differential mechanism transmission ratio of the new CVT system on the torque distribution ratio,output and input torque ratio of the new system and the influence of the reducing mechanism transmission ratio on the torque distribution ratio of the new system are calculated. Finally,the feasibility of new type CVT system of heavy duty drilling automation platform is validated by the test method. The results show that,the reduction mechanism transmission ratio and differential mechanism ratio have great influences on the property of the new type CVT system parameters,with the introduction of the new type CVT system into drilling automation platform,the each measuring point stress maximum value and fluctuation value are decreased,which can obviously improve the system safety and smooth running.关键词：Drilling automation;CVT system;Heavy duty;Development
- 3
- |
- 36
- |
- 0
发布时间：2022-10-20 - 摘要：The key of rolling bearing fault mechanism research is that the built dynamics model of rolling bearing fault is effective and conformed to the actual working condition. On the basis of the gained contact equivalent stiffness and contact equivalent damping of the rolling bearing,the clearance and change of load area are took into account,the spring- damping system vibration model of rolling bearing is established. The vibration model of rolling bearing with single fault is built by loading the impulse function generated by surface damage point into the outer ring,inner ring and rolling body respectively. The vibration models are solved with fourth- order Runge- Kutta method,and then the vibration data of inner ring are obtained and analyzed in frequency spectrum. The correctness of vibration model of fault rolling bearing is confirmed by the multi- body dynamics simulation of fault rolling bearing and practical test experiments. The deviation between the modeling results and simulation results and testing results are less than 0. 5 Hz.关键词：Rolling bearing;Surface damage fault;Dynamics modeling;Multi-body dynamics simulation
- 4
- |
- 432
- |
- 3
发布时间：2022-10-20 - 摘要：The 3D finite element model of gear transmission system of wind turbine is established. Combining experimental signal and analog signal on ADAMS,the effect of the fault which based on a single failure with gear tooth broken of fixed axis and coupling faults with crack tooth on fixed axis gear- planetary gear tooth broken on different points of transmission system is studied. The fixed axis gear with tooth broken have significant impact on each measure point and have the same frequency distribution characteristic. The changes of the speed does not affect the distribution of characteristic on frequency domain. The side frequency will appear at high- level mesh frequency and the medium speed level mesh frequency and the doubler. When the gear with coupling fault,the affect of fixed axis gear crack on the high frequency area of each measure point is obvious,the affect of planetary gear tooth broken on the low frequency area near the fault source is obvious,the amplitudes of mesh frequency and multiplier frequency of planet gear and the side frequency are obvious. The angular acceleration signal and experimental signal have the same distribution of characteristics.关键词：Wind turbine;Adams;Fault impact;Angular acceleration
- 4
- |
- 164
- |
- 1
发布时间：2022-10-20 - 摘要：For lower accuracy of tooth surface of outputted model after simulation process for spiral bevel gear,some methods cubic NURBS reconstruction and optimization of tooth surface are proposed by combining with the advantages and features of the Non- Uniform B- Spline curves（ NURBS） in CAD / CAM. Firstly,on the basis of analyzing the tooth surface shape from simulation processing,the initial data points are extracted and made their optimal selection. The transverse tooth profile including work,fillet,tooth root part as v line,similarly tooth fillet line as u line,the NURBS curve fitting is respectively carried out. Then,based on the basic curves by fitting,the NURBS reconstruction of tooth surfaces for spiral bevel gears is carried out by using the skinning method. Finally,the reconstruction of tooth surface as the base surface,a variety of tooth surface optimization schemes based on Newton iteration and the least squares method are proposed,so as to complete the precise fitting of the tooth surfaces. Though making compared accuracy analysis of the relevant numerical examples,the proposed method for reconstruction and optimization have a good validity.关键词：Simulation process;Spiral bevel gear;NURBS;Reconstruction of tooth surface;Skinning method;Optimization of the tooth surface
- 4
- |
- 148
- |
- 5
发布时间：2022-10-20 - 摘要：The modularization and serialization design idea is introduced into the method to research the design method of yaw reducer of wind power transmission system,a new configuration programs- NGW compound NGWN（ Ⅰ） is proposed,serialization basic planetary gear transmission modules are formed,the parts reusability and interchangeability of yawing reducer are enhanced. According to the definition of modular design approach,the yawing reducer planetary transmission mechanism is divided into NGW type and NGWN（ Ⅰ）type two planetary modules. The tooth number optimization model is built for both modules respectively,the same type and function but different transmission ratio planetary planets modules are formed,there are 28 species NGW modules and 9 species NGWN（ Ⅰ） modules. By the definition of serialization design method,the standard series modulus are given,the gear module series are formed. Finally,the wind power yaw reducer rapid design process is established based on planetary modules. The reference to design yaw planetary reducer in wind power transmission system is provided.关键词：Yaw planetary reducer;Modularization;Serialization;Rapid design
- 3
- |
- 206
- |
- 5
发布时间：2022-10-20 - 摘要：By using the involute gears instead of the cycloid pin gears in the RV reducer,a 2K- V involute planetary gear reducer is redesigned,and a three dimensional model of the reducer is established. The static contact simulation of the internal meshing which is a key part of the reducer is proceeded by the finite element analysis software ABAQUS. Then,the meshing tooth pairs and the load distribution are obtained and compared with the results of theoretical calculation. A further comparing of contact load and the elastic meshing effect coefficient under different torque is conducted. Finally,considering the influence of gear frictional heat,a steady- state coupled contact simulation under rated torque is carried out,the temperature field distribution and the thermal stress distribution of the tooth are obtained,the reliability of the gear contact characteristic is proved.关键词：2K-V transmission;Structure design;Contact simulation;Multi tooth elastic meshing;Thermal mechanical coupling
- 3
- |
- 237
- |
- 1
发布时间：2022-10-20 - 摘要：The parallel robots have some advantages of strong load capacity,fast speed moving and large stiffness,it makes up for the deficiency of series robot and will become a potential motion platform with high speed and high precision. The kinematics model and closed chain constraint equations are established based on the constrain relationship between the primary and passive joints in three chains for solving these problems of poor dynamics performances and uncontrolled motion about the designed six- bar parallel measuring machine.The calculation of space singularity of measuring machine is realized through the calculation of 15 generations by using normalized genetic algorithm through converting the singularity solution into calculation of LMI extreme-value,the normalized genetic algorithm calculation accuracy reaches 1. 689 × 10- 5. The proposed method avoids of mass computation compared to the traditional way based on the analysis of Jacobin matrix and has obvious advantages of high accuracy and fast convergence rate. The theory foundation is established for realizing measuring work in high speed and high accuracy.关键词：Parallel measuring machine;Singularity;Normalization;Genetic algorithm
- 4
- |
- 90
- |
- 1
发布时间：2022-10-20 - 摘要：Based on the principle of cycloidal pin gear planetary transmission,a new type of coaxial single input and ipsilateral double output cycloid speed reducer is presented. The working principle of the reducer is discussed and the transmission structure is analyzed,with the transformation mechanism method,its transmission ratio formula is deduced. The motion response of the output shaft of the reducer and the stress change rule of the key parts are simulated by using ADAMS software. The transmission ratio which gets from the simulation is compared with the one of the theoretical calculation,which verifies the feasibility of the transmission principle of the reducer. The two output shaft of the reducer can realize the coaxial positive and negative output transmission and the transmission ratio can be designed independent,especially suitable for the double- screw coaxial transmission of mixer,aircrafts,ships and submarines.关键词：Cycloid speed reducer;Coaxial double output;Adams
- 3
- |
- 170
- |
- 6
发布时间：2022-10-20 - 摘要：The geometric parameters are defined according to structural features of RV reducer and the secondary development of ANSYS for parametric modeling is finished by using ANSYS parametric design language（ APDL） and user interface design language（ UIDL） based on tooth profile equation of curtate cycloid and involute. The parametric modeling is proved by using the kinematic simulation through Pro / E. The modal analysis of RV- 40 E is finished and the results is coincided with the experimental modal analysis results. By changing the parameter,a study about influence factors of the first order natural frequency is conducted. The influence curve is obtained and it can become the basis of improving dynamic property. The method of parametric modeling of RV reducer could improve the efficiency of finite element analysis by reducing the workload of modeling and avoiding repeated modeling. The application in modal analysis has laid the foundation for the integration of parametric modeling and finite analysis of RV reducer.
- 3
- |
- 466
- |
- 2
发布时间：2022-10-20 - 摘要：In order to solve the problems of low transmission efficiency,large moment inertia of new type integrated axle housing electromagnetic clutch with heavy load,the integrated axle housing electromagnetic clutch is regarded as the research object,the uniform design theory and regression analysis are used to completed the optimization design on the structure parameters of the integrated axle housing electromagnetic clutch,finally,the electromagnetic clutch optimized is verified by bench test method. The results show that the optimization of integrated axle housing electromagnetic clutch input shaft speed between the initial value and stable value difference is relatively small,and the engagement time significantly shorter than no optimization of electromagnetic clutch. In addition,the optimized model of electromagnetic clutch force between the disc and friction plate is decreased significantly,which can effectively improve the structural stability of clutch.关键词：Integrated axle housing;Electromagnetic clutch;Optimization;Uniform design theory
- 5
- |
- 66
- |
- 0
发布时间：2022-10-20 - 摘要：Combined with the working process of the synchronizer and theoretical formula,to shorten the synchronization time as the goal,the parameters influence on shift and shift synchronization time are studied and the parameters are optimized. By using the ADAMS and Pro / E,the virtual prototype model of accurate lock ring synchronizer is built and the simulation analysis of the model is carried out. The reliability of the result of simulation and optimization is verified by experiments. The optimized model is import into ANSYS workbench for finite element structure analysis and check. The reference basis for the design of synchronizer is provided.关键词：Synchronizer;Adams simulation;Parameter optimization
- 4
- |
- 195
- |
- 7
发布时间：2022-10-20 - 摘要：Aiming at the crack phenomenon in high- speed gearbox,the force of the suspension gearbox is calculated. The strength analysis of gearbox is carried out by using the finite element software ANSYS Workbench,and the weak position of gearbox is founded and the improvement scheme of the structure is put forward.The improvement scheme of structure is verified by using the simulation software. A basis for the structure design and optimization of high- speed rail gearbox is provided through the research work.关键词：High-speed rail gearbox;Load calculation;Finite element
- 4
- |
- 499
- |
- 2
发布时间：2022-10-20 - 摘要：According to the characteristic of the trapezoidal thread screw,at first,the equation of the cross- section shape intersecting line is deduced,and according to the concept of polar moment of inertia in material mechanics and superposition principle,the accurate calculation formula of threaded screw polar moment of inertia is got. In the formula,when the thread tooth angle take different values,the tooth shape is the different thread.关键词：Thread screw;Cross-section shape;Axile sectional shape;Polar moment of inertia;Superposition principle
- 3
- |
- 88
- |
- 2
发布时间：2022-10-20 - 摘要：The Monte Carlo method is a simple and common way to analyze workspace for robot,and workspace boundary extraction is the key part of Monte Carlo workspace analysis. By using an improved algorithm to extract the workspace boundary of a robot with 7 degrees of freedom,the extraction efficiency and the result both meet the requirement of the following work. The efficiency and accuracy of the improved algorithm are analyzed through experiment,and the result shows the improved algorithm is effective.关键词：Robot;Monte Carlo method;Workspace;Boundary point extraction
- 4
- |
- 216
- |
- 2
发布时间：2022-10-20 - 摘要：The virtual prototyping modeling of new typed disc cam mechanism with straight moving negative radius roller follower is created by using Pro / E and ADAMS. The flexibility treatment to roller follower is carried out by using the ADAMS / Flex module and the rigid- flexible coupled model is built,the output response motion curve of flexible follower is obtained. Comparing the output response of flexible follower with rigid follower,it directly reflects the deviation of the motion rule.关键词：Adams;Cam mechanism;Flexibility;Coupled model;Output response
- 5
- |
- 359
- |
- 9
发布时间：2022-10-20 - 摘要：The working theory of the aged chair auxiliary standing mechanism is introduced,the force transmission characteristic analysis for auxiliary standing mechanism is carried out,and the motion regular of transmission angle for this mechanism is obtained. For the problem that the traditional auxiliary standing mechanism have the poor force transmission characteristic and mechanism efficiency,a motion simulation and parametric modeling is carried out by using the multi- body dynamics simulation software ADAMS. Then,the optimization analysis with the target that transmission angle of auxiliary standing four- bar mechanism obtain maximum value is carried out. Finally,the parameter effecting on the main design variables of transmission angle is defined. The results show that transmission angle is obviously improved after the optimization,the force transmission characteristics and mechanism efficiency of auxiliary standing mechanism are improved,as the same time front rake level of mechanism is increased to help the aged standing.关键词：Auxiliary standing mechanism;Adams;Motion simulation;Parameter optimization design
- 3
- |
- 749
- |
- 1
发布时间：2022-10-20 - 摘要：To study the dynamic characteristics of planetary reducer mechanism of shearer cutting unit under complex coal seam condition reliability,the shearer rigid- flexible coupling model is established. The analysis and dynamic simulation of the shearer outer drum load under the extreme condition are carried out,and the load and virtual simulation is carried out in the dynamic simulation software Recur Dyn. Through the force analysis of the inner gear ring in the cutting unit planetary reducer mechanism,the maximum equivalent stress location is found out and according to its force condition,the structure optimization is carried out. Through the simulation for the planetary reduction mechanism after gear modification,it is found that the maximum equivalent stress is less than the material allowable stress,and the tooth surface fatigue life is greatly improved. An important reference for the study on gear dynamics is provided.关键词：Rigid-flexible coupling;Load;Virtual simulation;Planetary reducer mechanism;Optimization
- 3
- |
- 167
- |
- 1
发布时间：2022-10-20 - 摘要：The tufting carpet machine has multiple sets of linkage mechanism,and the movement of the linkage mechanism directly affect the quality of the weaving and efficiency of the loom. Taking the needle rod mechanism of tufting carpet machine as the research object,by using ADAMS simulation software,a simple model of tufting carpet machine needle rod mechanism is built and the dynamics simulation analysis is carried out. The diagram of reaction of supports,working retard moment and the balance torque on the crank of each connection point on the crank- rocker mechanism of the tufting needle rod mechanism is obtained. And comparing with the diagram of experimental data which is by numerical analysis that to verify the correctness of the dynamic simulation analysis,and a basis for the optimization design of tufting needle rod mechanism is provided.关键词：Adams;Dynamics simulation;Crank-rocker mechanism;Numerical analysis
- 4
- |
- 217
- |
- 2
发布时间：2022-10-20 - 摘要：The cycloid gear and the crankshaft are important parts of a RV reducer,and the bending deformation at Rome dots of the component is one of the main failure forms of the RV reducer. Therefore,taking the RV- 250 reducer as the research object,and the RV- 250 reducer model without interference is built.Based on the characteristic of periodic input,uing the finite element method,the harmonic response analysis of RV reducer is completed and the amplitude frequency response curve of the eccentric shaft and the cycloid gear of the key components are obtained,as well as the index of dynamics such as natural frequency and the response amplitude. Results show that it will lead to the cycloid gear bending vibration and axial deformation when the vibration force of eccentric shaft is around 360 Hz,a theoretical basis for the optimal design of the cycloid gear and the crankshaft is provided.关键词：RV reducer;Harmonic response;Finite element method
- 4
- |
- 350
- |
- 1
发布时间：2022-10-20 - 摘要：The transmission system of front- engine rear- drive automobile is one of main excitation source of automobile vibration,the vibration of transmission system will seriously affects the NVH performance of the vehicle. Taking the transmission system of a MPV automobile as research object,which has serious car booming noise when operating slowly at a high gear,the source of noise is analyzed by test analysis method,and the simulation method of hypoid gear of main reducer in the system is studied,a rigid- flexible coupled model of transmission containing gear is established and the dynamics analysis is carried out. The result shows,the torsional resonance of transmission excited by alternating torque from engine will impact the meshing force of gear,cause the vibration of car body and make the car booming noise. This mechanism can provide base for the improvement of acoustic characteristic of the automobile.关键词：Front-engine rear-drive;Car booming noise;Hypoid gear;Rigid-flexible coupled model;Dynamics analysis
- 3
- |
- 304
- |
- 1
发布时间：2022-10-20 - 摘要：Taking the slewing gear of anti- radiation hydraulic excavator as study object,the 3D model of slewing gear is established by using Pro / E,the correct meshing parameters of slewing gear meshing transmission are determined,and the slewing gear mesh dynamics simulation is carried on in ADAMS. The simulation results of rotating speed of gear ring,meshing force and the frequency of the meshing force are much the same as the theoretical calculation value,the accuracy and reliability of the model are verified. Finally,the influences of different rotation speed and torque on meshing force are analyzed. The simulation results can provide the basis of the calculation for strength check and optimization design of slewing gear.关键词：Adams;Gear meshing;Collision force;Dynamics simulation
- 4
- |
- 106
- |
- 1
发布时间：2022-10-20 - 摘要：The radial deformation coefficient（ RDC） is one of the important parameters that influence the elastic deformation of flexspline（ FS）,the double circular arc tooth profile（ DCTP） is selected as the tooth profile of harmonic transmission FS,the influences of RDC on conjugate exist domain（ CED）,conjugate tooth profile（ CTP）,the locus of meshing are researched by using MATLAB based on the envelope meshing theory of harmonic drive（ HD）. The results show that RDC not only has evidently influence on the radial deformation of FS tooth that near the long axis and short axis of wave generator（ WG）,but also the tangential deformation and normal angle of FS tooth that near the transition segment between the long axis and short axis of WG; with radial deformation coefficient decreases,the CED increases with the RDC increase,while the blank area between the CED is decrease,moreover,the CTP of CED one shifted upward,while the CTP of CED two move shifted downward,the effectively CED and effectively CTP are found. Furthermore,reasonable choice of radial deformation coefficient is one of the important ways to avoid the meshing interference of HD and improve the meshing performance of HD.关键词：Harmonic drive;Double circular arc tooth profile;Radial deformation coefficient;Meshcharacteristic
- 3
- |
- 134
- |
- 2
发布时间：2022-10-20 - 摘要：The hydrodynamic retarder is one of the important auxiliary braking system in mining dump truck,which has an important influence on the braking force distribution and braking performance of the vehicle. Taking the braking performance of the hydraulic retarder in DFD30 T mining dump truck as the study object. By using the simulation software AMESim,the brake whole model is built,and a retarder under different conditions are analyzed,the result of simulation is compared and analyzed,the further research of the hydraulic retarder braking performance of the system is carried out. Through studying the matching of retarder brake and service brake and simulation analysis of joint braking,it can be seen that the use of hydraulic retarder of brake force distribution,automobile braking performance,driving safety have certain superiority.关键词：Mining dump truck;Hydraulic retarder;Service brake;Braking performance
- 5
- |
- 142
- |
- 2
发布时间：2022-10-20 - 摘要：The fatigue limit of the material plays a vital role,when the gear life and reliability design. Because the Locati rapid test method need less time and data,and the test result is more reliable,which becomes the common method of gear fatigue test. But this method must refer to the related test data to determine the reference curve. A more reliable data processing method is discussed,compared with the traditional method,neither need to determine the reference curve in advance,nor need to calculate the sum of fatigue damage accumulation,but directly solve the fatigue curve equation to obtain the relevant fatigue limit. The improved method is simply solves the equation,the calculation process is simple and the result is more credible and accurate. The fatigue test can verify that this method is feasible,which provides a theoretical basis for using Locati rapid test method to obtain the fatigue limit of the related material.关键词：Gear;Locati;Fatigue curve equation;Fatigue limit
- 4
- |
- 120
- |
- 1
发布时间：2022-10-20 - 摘要：A robot which redesigned based on the omnibearing level posture robot is introduced. By adding a rotating mechanism on each sole,the redesigned robot can walk on the slope surface,thereby,it can walk on the two special surfaces as horizontal surface,slope surface,and overcome the vertical surface. The modeling of robot is carried out,and calculate the stroke relations among all the legs,the location relations between the robot and the environment,and the gradeability of the robot and so on are analyzed. The simulation analysis of two kinds of contact way and force condition of the key parts while it walks from horizontal surface to slope surface are analyzed by using Solidworks and ADAMS software.
- 2
- |
- 147
- |
- 0
发布时间：2022-10-20 - 摘要：The creeping phenomenon is a common instability phenomenon of chain transmission. Because of the roller conveyor chain often use to transfer power and convey material in the low speed,heavy duty and poor working environment,it more easily happen the creeping phenomenon to affect the normal operation of the conveyor chain. Through analyzing the dynamics characteristic and building the dynamics model of the conveyor chain,the main reasons of why the roller conveyor chain occur the creeping phenomenon are the different friction condition,the system stiffness and dynamic load. Finally,based on the Recurdyn,a simulation model of the roller conveyor chain transmission is built and the relative conclusion is verified.关键词：Roller conveyor chain;Creeping phenomenon;Recurdyn;Simulation analysis
- 3
- |
- 115
- |
- 1
发布时间：2022-10-20 - 摘要：The vibration signal which reflecting the equipment fault feature often drowned in background noise when mechanical equipment occurring fault. The fault feature is very difficult to extract through frequency spectrum analysis. The translation invariant multiwavelet denoising method is applied to noisy impact simulation signal and extract impact features hidden in the noise. Then the method is applied to the signal analysis of gearbox test bed,the experimental results show that the impact feature frequency of broken tooth gearbox can be effectively extracted through the translation invariant multiwavelet denoising method and broken teeth fault can be diagnosed,an accurate basis for fault diagnosis is provided. Through the simulation and experiment analysis,the effectiveness of translation invariant multiwavelet denoising method in fault diagnosis is verified.关键词：Multiwavelet;Translation invariant;Signal denoising;Fault diagnosis
- 4
- |
- 140
- |
- 1
发布时间：2022-10-20 - 摘要：The three- dimensional parametric modeling of double arc helical gearing is completed based on Pro / E software,and a finite element model is built in ANSYS Workbench 14. 5 with the degree of coincidence factors of double circular arc gear meshing transmission,the statics analysis are obtained in the case of a meshing cycle on the deformation. The relationship between tooth profile radius difference Δρ,helix angle β and gear contact stress is analyzed,it has certain reference value for the design and calculation of the double arc helical gearing.关键词：Double circular arc helical gearing;Contact analysis;ANSYS Workbench
- 4
- |
- 166
- |
- 8
发布时间：2022-10-20 - 摘要：A kind of joint type feeding and blanking manipulator for punch is designed,which regards sheet parts as the material and takes motion control card as the core of control. Each joint is driven by servo motors to make the load to lifting,rotate,move and swing. Then,the load transfer of the manipulator is analyzed based on manipulator movement and transformation principles of torque and inertia,the selection of the servo is completed.Also,the verification of the selection is carried out with the theory. Based on the completion of hardware configuration,the working process of manipulator is determined in view of its actual working condition.关键词：Four-axis manipulator;Stamping;Punch feeding and blanking;Load transfer;Selection of servo
- 3
- |
- 488
- |
- 7
发布时间：2022-10-20 - 摘要：Based on the platform of Visual Basic 6. 0,Visual Fox Pro 6. 0 and Visual LISP,the optimal design system is developed by establishing mathematical model for optimization design of two- stage cylindrical gear standard reducer and using integer optimal method and visual combination software development technology. The system consists of several exe executable programs and lsp program. Under the control of internal interface program,the system can realize optimization design and gear parts drawing.关键词：Standard reducer;Optimization system;Software development
- 4
- |
- 251
- |
- 1
发布时间：2022-10-20 - 摘要：How to determine the number of tooth matching,center distance,modification coefficient and the tip diameter of the gear are four key techniques in the designing of 3K- Ⅱ planetary transmission mechanism. According to the particularity of 3K- Ⅱ planetary transmission mechanism,the new method of determining the tooth matching,center distance,shift coefficients and the tip diameter according to the transmission ratio is proposed. Based on the contrastive analysis of the key transmission quality indexes,the reasonability is verified and has a certain practical value of this method.关键词：3K planetary system;Tooth matching;Shift coefficient;Transmission quality
- 4
- |
- 103
- |
- 1
发布时间：2022-10-20 - 摘要：Taking a cylindrical worm drive mechanism as the research object,the minimizing the volume of worm gear as objective function,the limit of the worm gear tooth surface contact strength,worm stiffness,number of worm threads,worm gear module and worm diameter coefficient as constraint conditions,the mathematical model of optimization design is established. Then,the M file is compiled to optimally design the structure size based on the Matlab. Finally,the optimal structure size of worm and gear is solved,which make the worm gear volume be cut down to 75% of the conventional design and it is significant and meaningful to the design of mechanical structure.关键词：Worm drive;Structural design;Optimization model;Matlab
- 5
- |
- 354
- |
- 5
发布时间：2022-10-20 - 摘要：With the principle of metamorphic mechanism,aiming at the right- angle space problem often encountered in the cabinet arrangement,a new kind of cabinet is designed and the design plan and size calculation are given.关键词：Metamorphic mechanism;New kind of cabinet
- 3
- |
- 100
- |
- 0
发布时间：2022-10-20 - 摘要：For the length deviation of cigarette products tipping paper and the shortage of direction correction device on cigarette- rolling machine,the causes of the offset of the tipping paper transmission is analyzed.The direction automatic offset correction system is researched and developed for tipping paper on cigarette- rolling machine,and the feeding system accuracy of tipping paper can be ensured,the length deviation of tipping paper during the cigarette- rolling process is improved,and the cigarette product quality is significantly improved.关键词：Cigarette-rolling machine;Tipping paper;Offset correction;Tension adjustment
- 3
- |
- 89
- |
- 2
发布时间：2022-10-20 - 摘要：<正>为认真贯彻科技"创新发展"战略,加强链传动专业的学术交流,提升链传动行业整体科技水平,推进链传动行业持续健康发展,拟在2016年下半年适当时机,召开全国第九届链传动学术研讨会。现就有关会议征文等事项通知如下:一、会议主要内容1.学术技术论文交流,主要包括链传动的基础理论研究、链条产品设计、材料选择与热处理技术、失效
- 4
- |
- 17
- |
- 0
发布时间：2022-10-20 - 摘要：<正>《机械传动》杂志创刊于1977年（原名齿轮）,由中国机械工业联合会主管,郑州机械研究所、中国机械工程学会、中国机械通用零部件工业协会齿轮分会共同主办,中国机械工程学会机械传动分会协办。本刊是中文核心期刊,中国科技核心期刊,中国核心学术期刊,中国科学引文数据库和中国学术期刊综合评价数据库统计
- 7
- |
- 139
- |
- 0
发布时间：2022-10-20
- Technical support is provided by Beijing Founder electronics co., LTD 豫ICP备05013835号-5
京公网安备11010802024621 - It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
- Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.
0