最新刊期
期 1 ， 2015
- 摘要：The undercutting phenomena and the limit normal point are two important concepts in gearing theory,design and manufacturing.Based on the different opinions about them in the current research of limit normal point and the geometry and movement characteristics of undercutting neighborhood research is not sufficient,the study on undercutting and limit normal point of the following different gears is carried out by using TCA technology,they include spur and helical involute gears,straight bevel gear,cylindrical worm-gears including I type,K type and C type worm-gear,face-milled and face-hobbed spiral bevel and hypoid gear,as well as single-enveloping and double-enveloping globoidal worm-gear.The study results show that,the sliding velocity on the undercutting line of the generated surface is not equal to zero as the traditional result but moves along the tangent of the undercutting line for most gears except for spur involute and straight bevel gears,the limit normal point is the tangent point of the undercutting line and contact boundary line indeed.关键词：Undercutting line;Contact boundary line;Limit normal point
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发布时间：2022-10-20 - 摘要：The motion state of a mechanism will be changed when its parameters undergo some changes.Focusing on the impact of the variations of the slider mass on the motions of an underactuation planar five-bar mechanism.By means of Simulink/SimMechanics and permutation entropy,the conditions for periodic（quasiperiodic）motion and chaotic motion are found by analysis the edge of chaos.Based on these conditions,the motions of the mechanism starting with periodic（quasiperiodic）motion and chaotic motion are studied under the circumstance that the slider mass is increased regularly.The results show that the motion of the mechanism will eventually be chaotic no matter what kinds of motion the mechanism begins with.关键词：Underactuation planar five-bar mechanism;Permutation entropy;Varying parameter;Edge of chaos
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发布时间：2022-10-20 - 摘要：To enhance the accuracy of gear profile grinding,a compensation method for gear profile deviations by grinding wheel dressing is studied.Firstly,the necessity of studying this method is illustrated,and then the principle of this method is introduced.The tooth profile measurement data is fitted by 3 Bspline curve,the fitting curve equation and the real tooth surface equation are founded.Based on it,in view of the tooth profile deviation compensation,the imaginary tooth surface equation used to calculate the grinding wheel cross-sectional shape is proposed.Based on the different gear measurement data of the same tooth,the different grinding wheel cross-sectional shape can be got,therefore all the grinding wheel cross-sectional shape can form line group,then using least square method to fit the discrete points in line group,the best grinding wheel cross-sectional shape can be got to compensate the tooth profile deviation.Finally,the experiment result shows that the tooth profile deviations could be enhanced to accuracy grade 3 from 5,the tooth profile slope deviation and tooth profile shape deviation are reduced obviously.关键词：Grinding wheel dressing;Form-grinding;Form grinding wheel;Gear profile measurement;Tooth profile deviations compensation
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发布时间：2022-10-20 - 摘要：The three-dimensional model is built based on the structure characters of 3-RPS parallel robot through using Pro/E software.The inverse kinematics of the mechanism is obtained by using a new numerical algorithm,and the limit searching method is used to simulate the workspace through using MATLAB software.The simulation results are compared with the Euler angle algorithm.The influence of mechanism parameters on the workspace is analyzed,and the maximum volume of workspace in the parameter range is derived.A foundation for parallel robot parameter optimization and path planning is Laid.关键词：Parallel robot;Workspace;Mechanism parameter
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发布时间：2022-10-20 - 摘要：The ball pin of the steering assembly fractured during using for a special type heavy-duty truck.After inspection,the motion interference problem may exist.Considering the complexity of the space motion of steering system,the global coordinate system and several local coordinate systems and the relationship between them through the transformation matrix are established.The swing angle of the ball head pin is solved to check whether it is beyond the range of design angle.Eventually,find out the the movement interference problems is exist in the ball head pin.A basic theory for its structural improvement of the vehicle is provided.关键词：Ball head pin;Motion interference;Coordinate transformation;Swing angle
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发布时间：2022-10-20 - 摘要：The 3-stage planetary reducer with closed-loop control is adopted in CE-3 lunar rover wheel drive mechanism.Aiming at the problem that the speed stability of drive mechanism does not satisfy the design requirements,the factors affecting the speed stability of planetary reducer are systematically analyzed,and methods and measures minimizing the inequality of load sharing of planetary gear sets are studied carefully.Through troubleshooting and numerical simulations,the causation is uncovered as follows:the first stage sun gear radial runout exceeds the allowed range.Then two solutions are proposed:the first one is to redesign the first stage sun gear into a floating sun gear,the second one is to improve the machining precision of the first stage sun gear.And the second solution is adopted because it is smaller and lighter than the first one.Then much ground simulation tests which are conducted at the room condition,high-temperature vacuum condition and low-temperature vacuum condition demonstrate that the speed stability of drive mechanism satisfies the design requirements.At last,the effectiveness of the proposed method is validated by the telemetry parameters of lunar rover moving on the moon surface.关键词：Planetary reducer;Speed stability;Closed-loop control;Lunar rover
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发布时间：2022-10-20 - 摘要：The tuned mechanism has mistuned dynamic response when significant flexibleness of components and high speed of mechanism are considered.In order to research mistuned responses,a virtual prototype model of tuned flexible mechanism is applied to simulate kinematics and dynamics.Dynamic responses are simulated in case of mistuned force and mistuned mass.The random parameter sampling data are computed by Monte Carlo method and stochastic response distribution is given by statistical analysis.The results showed that there are mistuned responses in periodical flexible mechanism.The mistuned responses are propagated in form of components vibration in flexible mechanism.The research has laid foundation on vibration localization features of mistuned mechanism.关键词：Periodic mechanism;Flexible;Mistuned;Dynamic response
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发布时间：2022-10-20 - 摘要：A kind of 3-DOF planar parallel mechanism which has two translational and one rotational is introduced.Firstly,the position and posture analysis of the parallel mechanism is conducted,its positive and inverse solution equations are established,and then the position positive and inverse solution are solved.Secondly,by using the MATLAB to calculate a group of experimental data,the results can be used to test the correctness of equations.At last,according to the positive and inverse solutions equations,the velocity and acceleration of mechanism input and output are solved.The results show that the structure of 3-PRP mechanism is simple and also can be easy to control and drive,meanwhile,the researching results established a certain theoretical basis for the performance research on the mechanism such as workspace,trajectory planning and optimum design.关键词：3-PRP parallel mechanism;Kinematics;Position and posture analysis;Simulation
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发布时间：2022-10-20 - 摘要：By establishing apseudo-rigid-body model of the planar 3-RRR type fully compliant parallel mechanism,and using micro approximation algorithm,the displacement jacobian matrix between the input and output is got,the displacement vector differential mapping relation between input and output under the micro motion case is researched,and the numerical validation is carried out,the simulation of it is conducted with ANSYS software,the theoretical reference basis for differential motion analysis of this kind of planar parallel mechanism and spatial parallel mechanism with multiple input and multiple output characteristics is provided.关键词：Planar 3-RRR type fully compliant parallel mechanism;Pseudo-rigid-body model;Displacement vector differential mapping;Differential movement
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发布时间：2022-10-20 - 摘要：A 3D model of hexapod robot leg mechanism is built,and the optimization problems of hydraulic design are discussed.Then its mechanics model is established.The output torque characteristics of robot each joint at steady state are obtained through the statics analysis,and the output torque characteristics of robot each joint in the process of movement are obtained by Lagrange method as an approach for the dynamics analysis.Finally,based on the dynamics analysis results,the foot trajectory and leg posture simulations of single leg mechanism are carried out by using ADAMS,and through the results,the smooth movement of the leg mechanism is verified and the theoretical support for the follow-up research is provided.关键词：Hexapod robot;Mechanics analysis;Electro-hydraulic driven;Dynamics
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发布时间：2022-10-20 - 摘要：The kinematics and workspace for articulated arm coordinate measuring machine（AACMM）is the basis for structure optimization and precision analysis.First,the kinematics theory model of AACMM is established by using D-H method and tri-dimension kinematics simulation is implemented based on the secondary development of SolidWorks to verify whether the kinematics model is correct.Then the AACMM workspace is analyzed and simulated by Monte Carlo method and the cloud picture is obtained.Finally,the volume of workspace is calculated more accurately by the stratifying method and boundary extension,a basis for the parameter optimization is provided.The simulation results show sthat the workspace of AACMM is distributed uniformly and no cavity and it meets the measurement requirement.关键词：Articulated arm coordinate measuring machine;Kinematics simulation;Workspace;Monte Carlo method;Secondary development
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发布时间：2022-10-20 - 摘要：In view of the phenomenon that icy roads to road traffic accidents have severely affected,a mechanical deicing special vehicle for road deicing,which carried on the reasonable design and layout is devised.The belt drive system of mechanical deicing device is major researched,infinitesimal dynamics equation of conveyor belt is established,and the belt drive system is analyzed in theory.Through theory design and engineering design algorithm,the belt transmission torque and power is analyzed,the foundation for the further study of belt transmission is laid.By using the ANSYS and ADAMS,the stress simulation and dynamics simulation of belt drive systems are carried out,and the correctness of the preliminary design of pulley drive system is validated,the technical support of the optimum design of deicing special vehicle is provided.The study of deicing special vehicle deicing efficiency has played a key role,which with better economic benefits and promotional value.关键词：Deicing special vehicle;Belt drive;Infinitesimal dynamics equation;Simulation
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发布时间：2022-10-20 - 摘要：According to the problem that the wheeled robots have poor ability to adapt terrain,and the legged robot moving speed is limited,a wheel-leg hybrid robot with four-legs is designed,which can both crawl and roll.And the robot is driven by steel wire rope with torsional spring scheme to realize switching function of working manner.In the overall design of the robot,the legs are detailed designed.The kinematic equation of standing leg is established by the D-H method,and the correctness of the kinematic equations is verified by Geometric method.The swinging leg motion space is obtained by MATLAB software.And the ability of the robot obstacle is analyzed.关键词：Wheel-leg hybrid;Robot with four-legs;Kinematic model;Motion space
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发布时间：2022-10-20 - 摘要：The promoting the safety performance and lightweight are considered as the objectives,a multi-objective optimization design of an aviation split path transmission system is conducted.To measure the safety performance of the system,gear contact and bending fatigue strength are computed.Afterwards,a multi-objective optimization model that includes maximum safety factors and minimum mass is developed,with the system parameters selected as design variables.Considering the system requirements for load sharing,a dynamics model of the split path transmission system is established so that the load sharing characteristics can be quantifiably measured and restricted.Non-dominated Sorting Genetic Algorithm II（NSGA-II）is adopted to solve the model.The results show that the method promoted can effectively improve the safety performance and reduce the weight at the same time.关键词：Split path transmission system;Optimization design（OP）;Multi-objective;Load sharing characteristic;Aviation
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发布时间：2022-10-20 - 摘要：The geometrical characteristic of ZA-type dual-lead worm is analyzed.The mathematical model involving the ZA-type dual-lead worm is built based on the characteristic of the points of the tooth surface spiral motion during the rotation of the worm.The MATLAB is adopted to calculate the mathematical model and the calculation results are imported to SolidWorks software to generate the 3 Dsolid modeling,which lay agood foundation for NC machining,finite element analysis and dynamic analysis of the ZA-type dual-lead worm.关键词：ZA-type worm;Dual-lead;Digital modeling
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发布时间：2022-10-20 - 摘要：Based on the dynamics research,an optimum mathematical model of cone type friction clutch is established with the working space for the optimization objective.Aiming at the fuzzy factor analysis of some important design parameters,the fuzzy comprehensive evaluation method is used to optimize this clutch.It is shown by calculation that the working space can be obviously decreased by optimization.Therefore,this optimization method provides the theoretical foundation to research the performance of cone friction clutch.关键词：Cone type friction clutch;Optimum design;Fuzzy comprehensive evaluation
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发布时间：2022-10-20 - 摘要：For a long time,the theoretical derivation value of the transmission efficiency of 2K-H negative differential gear train is high,however,there is large power loss of hoisting reducer epicyclic gear train in practice.The theoretical analysis and practical application is combined to discuss various factors and their proportion that impact the actual transmission efficiency of 2K-H negative differential gear train in main hoisting reducer of ladle crane,aiming to make the calculated value is closer to actual value.关键词：2K-H negative differential gear train;Meshing power method;Transmission efficiency;Ladle crane
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发布时间：2022-10-20 - 摘要：The optimal design of the straight-conjugate internal gear pair tooth profile parameter is carried out,the performance parameter functional equation of the straight-conjugate internal gear pair is analyzed.The optimization design mathematical model is set up,and the design variables are decided.By making use of the Matlab optimizing software tool,the optical calculation to the whole gear pair and he detailed comparison about the performance and tooth profile parameters of the before and after are carried out.关键词：Internal gear pair;Straight-conjugate;Tooth profile parameter;Optical design
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发布时间：2022-10-20 - 摘要：After analyzing the current design shortcomings of Geneva mechanism,a method of Parameterized modeling for Geneva Mechanism in modular is proposed by Pro/E/layout.The method is simple,convenient and visual.It could realize fast modeling and fast reconstructing of Geneva mechanism.It provides an advice to Geneva mechanism and other mechanism design.关键词：Geneva mechanism;Modularization;Parameterized modeling;Pro/E/Layout
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发布时间：2022-10-20 - 摘要：Aiming at the problem of automobile steering design with a double cross shaft universal joint transmission,by spatial layout design to achieve a smooth speed output shaft is studied.Taking a vehicle steering system as an example,the dynamics model of ADAMS/view double cross universal joint is established,with the output shaft of the speed fluctuation rate as the optimization objective,optimization design of the parameters can be changed in the system is carried out,finally,the ideal steering hard point layout scheme is got.关键词：Steering system;Double cross universal joint;Fluctuation;Parameterization;Optimal design
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发布时间：2022-10-20 - 摘要：The problem of randomness and fuzziness of mechanical design could effectively dealed with through the fuzzy reliability optimization design which established by the combination of fuzzy mathematics method and mechanical optimization technique.Taking the multi-stage planetary gear train as research object,the optimization and allocation of transmission ratio is implemented by the conventional optimization design method.On this basis,taking the fuzzy reliability constraints as the main constraint condition,the volume,transmission efficiency and contact ratio as object,the multi-objective fuzzy reliability optimization mathematical model is established.Then the fuzzy reliability optimization design is transformed into conventional reliability optimization design through the multistage fuzzy comprehensive evaluation,and the optimization design is carried out by using Matlab optimization toolbox.关键词：Planetary gear train;Multi-objective;Fuzzy-reliability;Optimization design
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发布时间：2022-10-20 - 摘要：A balanced shape design of an eccentric gear is presented,by using the leverage balanced design principle,the balance force on gear tooth is achieved by changing gear shape in the software of UG.After eccentric gear design,the original mechanical strength is retained,the force between the teeth is more evenly,the drive is more smoothly.关键词：Eccentric gears;Elliptical gear;Shape design
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发布时间：2022-10-20 - 摘要：Based on flow pulsation formula of the straight internal gear pump,the straight conjugate internal gear pump is studied,the instantaneous flow rate formula is derived and the reliability of the formula is verified by experiment.The maximum and minimum of the instantaneous flow are obtained after the analysis of engagement characteristic in detail and the formula for the flow pulsation is derived.The influence of factors such as dedendum coefficient and half profile angle on the pulsation are analyzed,the impact curves are plotted in MATLAB and the optional dedendum coefficient is obtained through the curves.It can help improve the transmission stability of the pump.关键词：Straight internal gear pump;Flow pulsation;Dedendum coefficient;Half profile angle
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发布时间：2022-10-20 - 摘要：An ANSYS finite element analysis of temperature field is carried out aiming at laser quenching process of a large modulus gear used in the overloading car,which involve the establishment of 3D model,load method,command flow of moving heat source,longitudinal section temperature distribution,determination of the hardening layer depth.According to ANSYS Post-processing methods,the case of heat flow in the processing,the temperature variation of typical nodes along the scanning line of the heat source and the depth direction as well as the cause and the solution of the widely different temperature between the surface before and after the laser speckle（which is caused momentarily "heat flux accumulation effect"）are analyzed.The analysis results show that laser quenching on the gear tooth surface can achieve good effect,which is validated by the experiment.关键词：Gear;Laser quenching;Moving source of heat;Heat flux accumulation effect
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发布时间：2022-10-20 - 摘要：The dynamic meshing study is essential for the wind turbine which works in a harsh condition,especially,the gear train will be destructed by the time-varying load.Taking a wind turbine helical planetary gear train as study object,considering the influence of a variety of clearance and friction on meshing,a FEM model is built.By using the nonlinear dynamics method,the variation law of the gear tooth root bending stresses in the processing of the planet gear meshing with the sun gear or the internal gear is studied,the influence of the rotating speed on the meshing impact stresses is analyzed.Though the analyzing,with the speed increasing,the meshing stresses curve could get ahead,the impact stress of gear box and drive shaft will increase,while the curve of the impact stress are overall forward.However,the impact stress can’t always increase with the impact speed increasing.关键词：Wind power planetary gear train;Contact-shock;Dynamic meshing;Tooth root bending stress;Impact stress
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发布时间：2022-10-20 - 摘要：By using the SolidWorks,the entity model of general level two spur gear and the revolution of secondary cylindrical gear deceleration institution is established,and the model is imported into ADAMS to establish the kinematics simulation analysis,the adding method of constraints,speed,contact force and load is given,the gear meshing force and frequency of contact image are got.Compared with the secondary gear reduction mechanism of general condition of two kinds of state of motion,the simulation results show that,the theoretical value and the simulation value has a little error,a certain theoretical and technical support for the revolution speed and speed of gear transmission optimization design and strength checking of gear and shaft is provided.关键词：Revolution of secondary deceleration;Adams;Dynamics simulation
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发布时间：2022-10-20 - 摘要：The tapered roller bearing has great influence on rotary machine with high load,and hollow roller bearing is applied in significant engineering right now.According to Hertz contact theory and FEM,the equivalent three- dimensional simulation model of single roller-ring solid and hollow tapered roller bearing is established in ANSYS separately,the influence rule of various hole rate and load on elastic deformation and contact stress etc is analyzed.As a result,contact stress value is verified by theoretical calculating result.Simultaneously,the analysis one affords reference for optimal design and engineering application of tapered roller bearing.关键词：Tapered roller bearing;Hole rate;Contact characteristic
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发布时间：2022-10-20 - 摘要：Based on the method of ERA,a system of modal analysis is built,the model of HW25505 TCL gearbox is set up under the Coinv DASP MAS modal analysis module.The relating modal datum are obtained by hammering test of single-input multi- output analysis method,then the state-space equation is established after the analysis of modal datum.The various modal parameters of the gearbox are obtained by order selection and fitting of the datum which extracted through the method of ERA modal parameter identification,and by using modal correlation matrix,the modal test and verification are carried out.Through the comparison with calculating modal,the validity and reliability are proved.The theoretical basis for the improvement of the gear box structure characteristics and the fault diagnosis of gearbox is provided.关键词：Gear box;ERA;Modal analysis;Modal correlation matrix;Modal verification
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发布时间：2022-10-20 - 摘要：An exploratory experiment is carried out for the abnormal sound caused by automobile transmission shaft.The experiment is made up of two parts:vehicle road-test and transmission shaft bench-test.Three evaluation indexes of vibration are observed in the bench-test,and they are coefficient of rotate speed fluctuation,vibration acceleration at intermediate support and radial displacement of the shaft.From the comparison and analysis results,the correlation between abnormal sound in cars and the evaluation indexes of automobile transmission shaft vibration is confirmed.Each index has different performances in evaluating abnormal sound caused by different problems.These conclusions will be of great significance in abnormal sound detection,optimal design and improving the production process of automotive transmission shaft.关键词：Abnormal sound;Automotive transmission shaft;Evaluation indexes of vibration;Experimental research
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发布时间：2022-10-20 - 摘要：To the problems of difficult to meet the complex parts structure manufacturing of a circular belt drive mechanical transmission on the time-varying transmission ratio and specific output requirements,a non-circular belt drive mechanism of variable speed is designed,the kinematics analysis of the transmission mechanism is carried out,and compared with the circular belt transmission mechanism.The results show that a non-circular belt drive mechanism can achieve different movement according to the specific parameters of the output curve,the vibration and shock of non-circular belt transmission mechanism is greater than the circular belt drive mechanism,the design of non-circular belt drive mechanism can provide a basis for the design of the belt drive mechanism of variable speed and special belt drive mechanism.
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发布时间：2022-10-20 - 摘要：A virtual rigid-flex coupled prototyping of a new type shearer cutting unit is established based on the software of Pro/ENGINEER,ADAMS,ANSYS and MATLAB,and the forced vibration analysis of shearer cutting unit model is carried out based on the ADAMS/Vibration module,through the observation of main vibration mode of system find out that cutting of the excitation system does not inspire cutting part resonance occurs,but observation the system 33 order vibration mode,found near the center of mass in the shearer cutting,a larger torsional vibration is occuring,in order to improve the stability of coal winning machine shearer cutting,its transmission system is optimized,the results show that the centroid of the optimized shearer cutting x,y,zthree directions of the acceleration response amplitude is reduced by 74.2%,64.83% and 7.02%respectively,the torsional vibration decrease obviously,other test points are also significantly reduce the vibration amplitude,and the free modal and constraint modal of shell deformation amplitude have been improved significantly,decreased by 95.9% and 93.98% respectively,the optimization effect is remarkable.关键词：Shearer;Virtual prototype technology;Rigid-flex coupled;Vibration characteristic;Optimization
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发布时间：2022-10-20 - 摘要：For the problem of gear shaft resonance,the gear shaft is analyzed with adopting finite element method,the inherent frequency and vibration mode are obtained.The maximum of first and second inherent frequency and the minimum quality are set as objective function,based on Isight integrated optimization platform,the AMGA,NCGA,NSGA-II is adopted to the optimization design in respect of the diameter of neck of shaft.After optimization,the first inherent frequency and second inherent frequency are improved by 6.16% and 6.13%.The low inherent frequency are outside the range of excitation frequency,the quality of gear shaft is reduced,so the resonance will be effectively avoided.关键词：Gear shaft;Inherent frequency;Multi-objective;Optimization
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发布时间：2022-10-20 - 摘要：The transient dynamics method based on the nonlinear finite element is used for the simulation of a slider-crank mechanism with rigid and flexible body.The dynamic performances of the mechanism is achieved by considering the nonlinear condition of the materials,geometries and impact contact etc,which is useful for improving the design of the mechanism and enhancing the impact strength of the mechanism.关键词：Slider-crank mechanism;Nonlinear FEM;Transient dynamics;Impact strength
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发布时间：2022-10-20 - 摘要：The mechanical model of impact crusher spindle under operating condition is established and static strength of spindle dangerous section is checked by the method of mechanics of materials.The spindle deflection and torsional rigidity are calculated to check whether they met the design requirements or not.Besides,the specific distributions of stress are figured out through FEM method to determine the positions of dangerous points and the factor of stress concentration.Based on the result,the fatigue strength of spindle is calculated.The structure of the spindle is optimized through analysis.Therefore,the stress concentration of some parts is improved,as well as 8% weight reduction of spindle is obtained.关键词：Impact crusher’s spindle;Strength analysis;FEM;Optimization
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发布时间：2022-10-20 - 摘要：With the target of reducing the friction torque of tapered roller bearing,the globally optimal solution of bearing inner structural parameters is obtained by using the genetic algorithm.The friction torque,gearbox transmission efficiency,and vehicle fuel consumption and sliding distance are tested before and after the bearings are optimized.The results show that,the bearing friction torque is reduced,the gearbox transmission efficiency is increased,and the vehicle fuel consumption is slightly decreased while the vehicle sliding distance is highly improved.关键词：Tapered roller bearing;Friction torque;Transmission efficiency;Fuel consumption
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发布时间：2022-10-20 - 摘要：The overall design,measurement and control system of chain transmission test rig are described.A lot of experimental test is finished by the developed test rig.The experimental results show that chain transmission speed fluctuation curve and the unevenness coefficient curve is acquired by the test rig comply with the variation laws on the theoretical calculation.Also the high-precision and reliability is verified through the results.The analysis of experimental results has important guiding signification in practical engineering applications of transmission.关键词：Chain transmission test rig;Measurement and control system;Motion characteristic;Experimental research
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发布时间：2022-10-20 - 摘要：A new calculation method is developed because of the existing problems in the current tilt angle measurement for automobile engine belt tensioner.The new coordinate systems are set up based on tensioner design,the plane direction of pulley is calculated through vector operations,and a new test program is written to process the data in order to get the tilt angle variation of tensioner within the whole working range.Application in huge amounts of test data proved the correctness and validity of the new test program,and the problems in the original method are solved.After the optimization,parameter settings are completely identical with product drawings,the tilt angle definition fits both mathematical rules and common engineering application better,measurement data from various types of tensioners can be processed without further modification,command lines are more compact and running efficiency becomes higher.The test results after this improvement provide more valuable references to the evaluation procedure of belt tensioner products.关键词：Belt drive;Tensioner;Function test;Tilt angle measurement;Engineering mathematics;VB Script
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发布时间：2022-10-20 - 摘要：The Ant colony algorithm has the defects of premature convergence as its parameter selection greatly dependent on the personal experience.In order to solve the problem,a PAAA algorithm to optimization design the planetary gear reducer of the aerator is presented.To meet the constraints condition of structure and strength,taking the minimum volume and the highest efficiency of the planetary gear train as objective functions,its optimization mathematics model is established.The Matlab program is wrote to solve the mathematical model by using PAAA algorithm.The research results show that planetary gear train has smaller volume and higher efficiency under assuring the design requirements.The results also verified the PAAA optimization has the advantage of effective,accurate and reliable.关键词：Planetary gear reducer;PSO;ACO;PAAA;Optimization design
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发布时间：2022-10-20 - 摘要：The locking disc is the connections between main shaft and input planet stage of wind turbines gearboxs.Because of the high cost of fault maintenance,the requirement of working reliability is more strict.Based on elastic plastic deformation theory of thick wall cylinder in the field of mechanics of materials,and combining the deformation compatibility condition,the calculation method of torque transmission of locking disc is researched,and some important factors which effects the performance of torque transmission are analyzed by combining with practical engineering.It provides theoretical basis for design,manufacturing and improving the working reliability of shrink disc.It is helpful to engineering application.关键词：Performance of torque transmission;Elastic plastic deformation theory;Deformation compatibility condition;Reliability
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发布时间：2022-10-20 - 摘要：The processing technology of the special Linear conjugate internal gear shaping of gear pump is studied,and the gear shaper parameters which affects the machining accuracy of internal gear is obtained,on this basis,the relieving amount,column oblique movement,the gear tooth profile angle etc are analyzed and test.The results show that with the increase of the main movement speed and the workbench rotational speed,the inner gear processing interference is reduced,the cutting force and the workpiece cutting residual heat is decreased,the workpiece thermal deformation is become smaller,at the same time,the processing quality of workpiece surface is improved.关键词：Gear pump;Linear conjugate inner gear;Gear shaping process;Large circumference small feed
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发布时间：2022-10-20 - 摘要：<正>本研究中心专业从事齿轮工程技术研发;有一支由长江学者、教授、海归博士、博士后、工程师等构成的近50人的技术团队;拥有30年的齿轮技术研发历史,承担了包括国家重大科技专项、863、支撑计划在内的一系列齿轮研发项目和课题,在齿轮领域取得了一系列达到国际水平填补国内空白的研究成果,获得国家科技进步奖1项、授权发明专利26项;拥有一批世
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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源期刊,中国期刊网、中国学术期刊（光盘版）入编期刊,中国期刊
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发布时间：2022-10-20
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