最新刊期
期 3 ， 2016
- 摘要：Taking the compound planetary gear train as research object,a nonlinear translation- torsion coupled dynamics model is established for compound planetary gear train considering the time- varying meshing stiffness,gear backlash and synthetic meshing errors,and the impact of installation error,eccentric error and the phase angle of them on the load sharing characteristic is analyzed. The results show that the installation errors and eccentric errors of central member will make equal periodic changes for planetary gear,and the installation error of planetary gear will make sustained partial load,while the eccentric error of it makes periodic change for load sharing coefficient. When the installation error phase angle of planetary gear is oriented to the same direction or distributed ons the meshed planetary gear pair,the load sharing coefficient is smaller. The load sharing characteristic is better when eccentric error is distributed on gears with larger difference number of teeth and the error symmetric distribution of planetary gears will gradually reduce the effect of error to load sharing coefficient.关键词：Compound planetary gear train;Load sharing characteristic;Installation error;Eccentric error;Error phase angle
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发布时间：2022-10-20 - 摘要：For the severe vibration and scream noise of a mini car main reducer in high- speed neutral coasting condition,the pressure angle of the main reducer hypoid gears is taken as the study object. A torsional vibration dynamics model of gears system is established,after changing the pressure angle on both sides of gear tooth in the UG model and importing into the ADMAS,the dynamics characteristics of the gear system with different pressure angle under the same coasting condition are studied and compared. It is concluded that the meshing vibration performance of main reducer gears system could be improved when the convex surface pressure angle of the passive gear tooth decreased 1° at the same time the concave surface pressure angle of the passive gear tooth increased 1°. The correctness of the simulation analysis is verified by experiments at last,and the research result could be applied to the design and manufacture of the main reducer gear.关键词：Main reducer;Hypoid gear;Pressure angle;Vibration analysis
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发布时间：2022-10-20 - 摘要：The chaotic motion and controlling of rotary machinery simplied of a compaction mechanism installed on the elastic support are studied. The results show that,there is a transformation from periodic motion to chaotic motion in period- doubling bifurcation route,then return to the periodic motion along with the increasing of angular velocity of the equivalent eccentric mass rotor. For the purpose of controlling chaos,a method to determine the design parameters of controller is proposed based on the edge of chaos. The main idea of the method is to take the parameters of controller as the system parameters,and the edge of chaos is determined,from which the design parameters of controller can be chosen directly. The method and its effectiveness are demonstrated by the design of PD controller and phase controller.关键词：Rotary machinery;Chaos;Period-doubling bifurcations;Edge of chaos;Chaos control
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发布时间：2022-10-20 - 摘要：Introducing the 4R equivalent circuit into parallel mechanism,the kinematics and dynamics property of the mechanism can be effectively improved. Meanwhile,the change of singular position in parallel mechanism may be caused. The singular position of 4R mechanism is analyzed by using screw theory. The 4R circuit is introduced into 3- PRS parallel mechanism to form a new 3- P（ 4R） RS parallel mechanism. The force Jacobian matrix is established,and the possible singular positions of actuator,platform and branched chain are obtained by using Jacobian algebra method. On this basis,the effect of rod length relationship on the singular position is investigated,and the 3- dimensional model and motion simulation of 3- P（4R） RS parallel mechanism are established by Pro / E. The result validates the conclusion that the introduction of 4R circuit can effectively avoid part of the singular position of the mechanism.关键词：3-P（4R）RS parallel mechanism;Force Jacobian;Jacobian algebra method;Singular position
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发布时间：2022-10-20 - 摘要：A novel 3T2 R redundantly actuated hybrid mechanism is proposed. First,the motion principle of realizing the three- dimensional translational and two- dimensional rotation motion of this mechanism are analyzed by using the screw theory. The DOF of this mechanism is calculated,and the driving joints are chosen and discussed. Then,the inverse position solution equation is established by using analytical method. Next,based on the inverse position solution and combining with the constraints condition of this mechanism,its workspace is studied by using the numerical search method,and performance superiority of the mechanism is analyzed. At last,the inverse position solution equation is solved by using MATLAB and the results simulation verification is carried out by using ADAMS,and the correctness of the inverse position solution model and the realizability of the mechanism are verified.关键词：Redundantly actuated;Hybrid mechanism;Screw theory;Inverse position;solution Workspace
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发布时间：2022-10-20 - 摘要：By analyzing the structures characteristics of the lower- mobility serial kinematic mechanism（SKM） and parallel kinematic mechanism（ PKM）,based on the linear independence theory of kinematic screws and taking of the lower- mobility SKM with single opened chain as unit,a systematic and effective type synthesis method is proposed for hybrid mechanism including the definition and symbol denotation method of both hybrid robots with a parallel mechanism and multi- parallel mechanisms. Firstly,the type synthesis of3T2 R 5- Do F SKMs with single opened chain are constructed based on the screw theory,then the type synthesis of 3T2 R hybrid mechanisms are accomplished by regarding PKM as a complex kinematic unit and replacing an equal DOF kinematic chain unit in lower- mobility SKM with single opened chain unit. Finally,other hybrid mechanisms are generated by the linear combination of the kinematic screw.关键词：Single opened chain;Screw theory;Serial mechanism;Hybrid robot mechanism
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发布时间：2022-10-20 - 摘要：Aiming at the error caused by the forcing analysis on the cycloid ball planetary transmission through the ball system and solving sum term inaccuracy to the elastic rotation angle,an exact solution of elastic rotation angle is presented by using the meshing stiffness coefficient and the numerical analysis software,and the changing law of dynamic rotation angle is explained. The model of force analysis and mathematical model are established,the expression of elastic rotation angle parameter is obtained. The concept of torsional stiffness is presented,and through the change of torsional stiffness,the changing nature of the dynamic rotation angle is reflected. The Fourier series expansion of the torsional stiffness in a period is carried out,the influence of different parameters on torsion stiffness is analyzed,and the simulation experiments are carried out. The results show that with the increasing of the short amplitude coefficient,rolling circle radius,number of steel balls and the ball radius values,the torsional stiffness coefficient and amplitude becomes larger,the influence of the number of steel balls on the rotational stiffness coefficient is the greatest.
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发布时间：2022-10-20 - 摘要：Through accuracy tracking control the trajectory of the robot,the accuracy of robot path planning and autonomous positioning can be improved. The motion track of the robot in the process of motion is influenced by small disturbance linear error,the robot system is a multi variable nonlinear control system,and in the traditional genetic algorithm for trajectory tracking control,the steady- state tracking error appearances in the boundary layer. A kind of algorithm of trajectory tracking control of robot based on improved genetic algorithm is put forward. The simulation of motion environment model of robot is constructed,the space coordinates of robot trajectory is regarded as the virtual world of abstract genetic populations,the grid structure model of the robot motion space is obtained. Through genetic evolution way to find the target point and move,and in order to make the robot trajectory control of genetic algorithm that satisfy matching conditions and parameters perturbation error,a integral term of robot trajectory tracking error in the synovial surface is designed,and the algorithm is improved. The simulation results show that,by using the algorithm,the optimal path of robot trajectory control can be found with fast convergence speed,and it has a better robot path tracking control accuracy and convergence performance,superior performance.关键词：Robot;Genetic algorithm;Control
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发布时间：2022-10-20 - 摘要：Taking the plug- in hybrid electric vehicle as the research object,in order to improve the fuel economy and emission performance,a fuzzy control strategy which can realize the reasonable distribution of demand torque between the engine and the drive motor is designed,and the method of genetic algorithm to optimize fuzzy control rules is introduced in detail. The optimization results show that,the optimized fuzzy control strategy can improve the fuel economy and emission performance compared with the results before optimization,and make the engine working points well concentrated in high efficient area. The research contents will provide operators and experts an effective way to design fuzzy control rules.关键词：Plug-in hybrid electric vehicle（PHEV）;Genetic algorithm（GA）;Fuzzy control strategy;Multi objective optimization;Fuel economy
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发布时间：2022-10-20 - 摘要：Based on tooth surface equation of double circular arc spiral bevel gear,using the three- dimensional modeling software of UG,the three- dimensional parametric modeling of double circular arc spiral bevel gear and the virtual assembling of the active gear and the driven gear in the UG is realized. The gear data is converted into parasolid format and introduced into the ADAMS,the variation of angular velocity and meshing force of the active gear and the driven gear are analyzed. Through the simulation analysis,it is verified to be reasonable of double circular arc spiral bevel gear parametric modeling,and a reference for the improvement and optimization of gear transmission design,geometric and strength calculation is provided.关键词：Double circular arc spiral bevel gear;Parametric;Adams;Dynamics
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发布时间：2022-10-20 - 摘要：Based on analyzing and researching on the structural features and failure mode of a two teeth difference outer mesh planetary gear transmission,according to the existing traditional structure form,a new method to optimize the structure and parameters of the two- tooth difference external meshing duplex planetary gear transmission is proposed,it is basically meet the requirements of equal sliding coefficient,the meshing performance and life between meshing gears could be improved effectively.关键词：Two tooth difference external mesh planetary gear transmission;Optimization method;Sliding coefficient
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发布时间：2022-10-20 - 摘要：Aiming at the problem of the high labor intensity,low eyeleting precision and low work efficiency of conventional paper flowerpot eyeletter with manual operation,an automatic eyeletter is proposed. And then,through building the mathematic model,the analysis and optimization of this mechanical structure is carried out by using mathematic analytic software. At last,two cam contour curves meeting the requirement of cam mechanism motion law well is designed. As a result,a strong theoretical basis for further study and object production in the future is provided.关键词：Paper flowerpot eyeleting;Optimization;Cam contour;Cam mechanism motion law
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发布时间：2022-10-20 - 摘要：Taking the bearing capacity increasing,meeting the equal strength design and the minimum center distance of gear drive as objective function,the multi- objective optimum design mathematical model of the two- grade helical cylindrical gear drive is established. The optimization solution is carried out by using NSGA- II algorithm,the multi- objective optimization design of two- grade helical cylindrical gear drive is carried out,and the Pareto optimal solutions are obtained. The result shows that the strength and the stable reliability of the optimal scheme is enhanced in terms of ensuring the equal contacting strength and the center distance has certain decrease.关键词：Reducer;Multi-objective;Optimization design;Genetic algorithm
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发布时间：2022-10-20 - 摘要：Due to the elastic meshing effect existed in planetary reducer with small tooth number difference,its real carrying capacity is many times greater than the calculation value obtained by the traditional gear design theory. Therefore,based on the elastic multi- tooth contact effect,taking the basic parameters of gear as design variables,and a multi- objective optimization model of small tooth difference planetary drive is established,while targeting on maximum efficiency as well as smallest volume and the internal and external gear equal strength of the core unit of the planet wheel. The optimization results show that the internal and external gear strength is close enough,and the meshing efficiency raised to 99. 65%,construction volume decreased by29. 3%. The ANSYS Workbench is applied for the statics simulation of the planetary reducer with small tooth difference. The correctness of the multi- tooth elastic contact load distribution calculation method is verified.The maximum stress position and value is consistent with the theoretical calculation results with the error less than 6. 0%,meeting the engineering accuracy requirements. The validity of the multi- tooth elastic meshing gear design theory and reasonableness of optimization scheme are verified.关键词：Small tooth number difference;Elastic meshing effect;Multi-objective optimization;Statics simulation
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发布时间：2022-10-20 - 摘要：Based on the system dynamics,geometric property of involute helical gear,the transmission error analysis of helical gear is carried out by using the software ABAQUS. A method to determine the tooth profile modification curves and modification quantity according to the gear transmission error is proposed. The transmission error of gear pair can be effectively reduced by using the method and an important research method for reducing the gear system vibration and noise control is provided.关键词：Helical gear;Transmission error;Tooth profile modification;Finite element
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发布时间：2022-10-20 - 摘要：Through tooth contact analysis（ TCA） and loaded tooth contact analysis（ LTCA）,the meshing process of spur gear pair is simulated. Based on this,combining with the elasticity theory,the contact stress on each meshing point are calculated. On the basis of the stress effect matrix of the finite element method,the bending stress states at the tooth root are analyzed. According to the calculation results of LTCA,an approximate calculation method of spur gear is proposed,the life of spur gear pair is calculated. Finally,a software of meshing analysis and modification designing of spur gear tooth flank is developed based on the MATLAB language.关键词：Spur gear;TCA;LTCA;Contact stress;Bending stress
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发布时间：2022-10-20 - 摘要：An optimal synthesis method of an integrated link with continuous trajectory generation mechanism is proposed based on the trajectory and velocity dual object design requirement of variable speed driving link. First,under the premise of setting uniform rotation of the crank,taking the minimum position error as objective function,the planar linkage mechanism size meeting the track design requirements is optimized and calculated. Then,regarding the driving link angular velocity as variable and the minimum error of implementing mechanism velocity value as objective function respectively,the movement law of the driving link is calculated.关键词：Variable speed driving link;Reproduction track mechanism;Velocity;Dual objective optimization
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发布时间：2022-10-20 - 摘要：The stairs- climbing wheelchair can be divided into several types according to the principle,including the crawler type,planetary wheel type and foot type,etc. The movement process of planetary stairs-climbing wheelchair is mainly analyzed,and the existing problems of the current stairs- climbing wheelchair is pointed out and a drive scheme which uses the concentric shaft to achieve different drive and can make a wheelchair move more stably is put forward. By using the CATIA software,the design of the structure and motion simulation are carried out,the feasibility of the design scheme is verified.关键词：Drive;Stairs-climbing wheelchair;Planetary;Concentric axis
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发布时间：2022-10-20 - 摘要：In order to solve the inconvenience caused by the connected axial movement for disassembly of sleeve coupling,the technology conflicts are analyzed by using the theory of TRIZ,and then the conflicts matrix form is constructed. An improved design of sleeve coupling is carried out by employing the principles of segment,local conditions and prior action as well. The reasonable parameters are given by means of strength calculation,and the rationality of structure design is verified by finite element analysis. The new sleeve coupling is featured with accurate location,reliable connection and simple structure,which is hoped to expand its application.关键词：Sleeve coupling;Improved design;TRIZ theory;Strength calculation;Finite element analysis
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发布时间：2022-10-20 - 摘要：As the wind turbine gearbox mounted on a flexible support tower,the wind turbine tower will be bent and wiggled under the complex working conditions,and it will serious influence on the dynamic characteristic of the wind turbine gear transmission system. Considering the coupling effect of wind turbine tower swing and planetary wheel drive torsional vibration,by using the lumped parameter method,the dynamics analysis model of the flexible support of wind turbine planetary gear transmission system is established,and then the numerically solution is carried out with Matlab. By taking the instance analysis of the mainstream 1. 5MW wind turbine,the displacement progress of each part of planetary gear system under 16 seconds random time series wind load is got. The result shows that,in the process of wind turbine operation tower generates excessive vibration,and the vibration of the tower exacerbates the vibration of the components of wind turbine planetary gear system. Then,the impact of the flexible of the wind turbine tower must be considered in the wind turbine planetary gear design.关键词：Flexible support;Wind turbine;Planetary gear system;Dynamic characteristic
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发布时间：2022-10-20 - 摘要：The AMT clutch pressure plate temperature rise characteristics with different thickness of pressure plate under different working environments are studied. Firstly,the 3D model of clutch pressure plate is established based on the structural parameter of clutch. Then,the influence factor of the temperature rise variation is analyzed,and according to the clutch pressure plate working environment,the thermal boundary condition is determined. Lastly,by using the ANSYS,the clutch pressure plate finite element thermal analysis is carried out,and the temperature rise curves of different thickness of pressure plate under different working condition are got. A good reference for the structural optimum of AMT clutch and the using control policy of clutch can be provided by the research result.关键词：Pressure plate;Temperature;Finite element;Temperature rise characteristic;Simulation
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发布时间：2022-10-20 - 摘要：To understand the structure dynamic characteristic problem of a certain type auto transmission housing,taking the type auto transmission housing as the research object,the modal simulation analysis and the experimental modal analysis are respectively carried out on the transmission housing by using the research method combining the technologies of mechanical structure finite element analysis and experimental modal analysis.The dynamic parameters of the transmission housing are extracted,the results of simulation and experiment are compared,it shows the change trend of first six order modal vibration mode have a certain similarity degree,with the relative errors of the same modal frequency are within 8%,it is effectively verified that the results of the structure modal simulation analysis on the transmission housing structure is the reliability. At the same time,the simulation and experiment results can effectively reflect the dynamic characteristics of the transmission housing,a foundation for auto transmission housing structure dynamic optimization is laid.关键词：Transmission housing;Finite element analysis;Experimental modal;Dynamic characteristic
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发布时间：2022-10-20 - 摘要：In order to realize the ankle recovery,a kind of auxiliary device for ankle rehabilitation based on a ball pin vice is developed. The device has two degrees of freedom,while three- dimensional movement of the ankle can be achieved approximately. Based on introducing the structure of the auxiliary device for ankle rehabilitation,the motion modeling and analysis of the device are performed. Aiming at multiple kind of drive patterns of the structure,the modeling analysis of rigid- soft combination drive and rigid drive pattern are conducted respectively. The related calculation formulas are deduced and calculated by Matlab. A process of this research can be as a reference for mechanism analysis of more motion models.关键词：Ankle;Bionic;Auxiliary rehabilitation device;Movement modeling
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发布时间：2022-10-20 - 摘要：The principle and application of flexible file generation process and gear slicing in the SIMPACK are introduced. Taking a 7MW wind turbine gearbox as an example,a multi- body dynamics model of the first planetary gear train is built in the SIMPACK. In the modeling process,the planet carrier is considered as flexible body and the gears are split into five smaller segments. The deformation of the planet carrier and the load sharing behavior is analyzed when gearbox is at rated input power and speed. The results show that,when using the accurate 3D model of planet carrier and considering the flexible of it,the deformation of the planet carrier is effected by the variable engagement force and tooth deformation. The deformation of the planet carrier connected to different pin is different,but the torsional deformation of input stage is larger than output stage generally. Comparing the deformation of the planet carrier with the load sharing coefficient,it is found that the torsional deformation of the planet carrier is the main factor effect the uneven load coefficient of the gear. The results can be a reference of the structural optimization design of planet carrier.关键词：Simpack;Load sharing;Planetary transmission;Flexible planet carrier
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发布时间：2022-10-20 - 摘要：Based on the rotary table of MCH50 machining center,a transmission accuracy model of combined mechanism is established by considering the process error,eccentric error,phase angle,load and deformation and so on. The model is verified by the calculation of driving mechanism,the result show that the integrated transmission error is consistent with the experimental result. On this basis,the influence of the distribution of the velocity ratio and center distance of gear on transmission accuracy is analyzed.关键词：Gear;Worm and gear;Transmission accuracy
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发布时间：2022-10-20 - 摘要：For the vibration test problem of internal parallel move gears reducer,the vibration test and analysis system of internal parallel moving gear reducer based on virtual instrument is proposed,through the test,the feasibility and correctness of the system are verified. The test results show that,the vibration amplitude of measuring points is proportional to the speed. Under the same speed in different load situation,the maximum amplitude is basic not variable,but the quadratic mean is obviously of increased. Under all conditions,the vibration signal is all taking the times frequency of the entered axis gear and shunt gear meshing frequency as mainly vibration frequency,and taking the 3 times frequency of power frequency as the intervals. The vibration rules of the reducer at X axis and Y axis direction are roughly to be the same,the cause of differences is the different of the structure distribution of X,Y direction.关键词：Internal parallel move gear reducer;Virtual instrument;LabVIEW;Vibration test;Signal processing
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发布时间：2022-10-20 - 摘要：Taking the radar vehicle- borne array lifting device as the research object,combing with the engineering practice,adopting the combination of theoretical derivation and simulation research method,an analysis method for the position error of array lifting device is proposed,and the causes and influencing factors of the position error of array lifting device are analyzed. Finally,by using MATLAB software,the simulation calculation is carried out,the position errors of array lifting device are obtained,the influence of the main parameters on the position error is analyzed,and theoretical basis for the design and control of the position accuracy of the array lifting device is provided,and the research results have some engineering significance.关键词：Array lifting device;Matrix method;Position error
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发布时间：2022-10-20 - 摘要：The 3D model of gearbox casing is built in design stage,and the FEA（ Finite Element Analysis） is carried out based on the ANSYS Software,the eight kinds of working conditions of locomotive runs normally are especially analyzed. Comparing with the Goodman curve,the stress of every point of gearbox model is within the Goodman curve. It is indicates that the gearbox casing meets the structural strength requirement,the rationality of structure design for the gearbox is confirmed.关键词：Cast aluminum gearbox casing;Finite element analysis;Goodman curve
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发布时间：2022-10-20 - 摘要：A simplified analysis model of aeroengines transmission system is established by using the concentrated mass method,and the dynamics equations of the transmission system are deduced according to this model. The nature modal of the system is analyzed by using the shaft element method. The nature modal of rotor system and the coupled modal of the system are calculated. Through the comparison of the two kinds of modal,it is found that the coupling transmission system contains not only the single axial modal and bending- torsiona- coupled modal dominated by a single axis,but also derived new bending- torsiona- coupled modal which is very sensitive to the gear coupling. The natural frequency of the rotor under different operating speeds is analyzed by using the Campbell diagram,which provides the basis for the analysis of the resonance characteristic of the system.关键词：Transmission system;Shaft element method;Compbell diagram;Bending-torsional coupling
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发布时间：2022-10-20 - 摘要：The kinematic analysis of a single spider universal joint is carried out,by using mathematical vector method,the transfer movement relationship of a single spider universal joint and the cross axis plane normal trajectory equation are obtained. By using the Solid Works Motion software,the kinematic trajectory of a single spider universal joint cross axis is simulated,comparing the simulated wave chart with the calculated theoretical equation,the correctness of the theoretical analysis results is verified,a theoretical basis for the single spider universal joint movement optimized design is provided. At the same time in space,a theoretical reference for the spatial arrangement of single spider universal joint steering system is provided.关键词：Single cross axis universal joint;Mathematics vector;Motion analysis;Solid Works Motion
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发布时间：2022-10-20 - 摘要：A new method based on logic mathematical fault analysis and support vector machine is provided for fault diagnosis of hydraulic and mechanical fault of automatic transmission（ AT）. The logic mathematical model of AT is established. Then,the logical relationship between fault and fault phenomena is analyzed. The fault simulation analysis is carried out based on AMESim,and the fault sample is provided,a fault identification based on support vector machine is carried out. The reference for developing the intelligent diagnosis system on fault diagnosis of automatic transmission is provided by this method.关键词：Automatic transmission;Fault analysis;Fault diagnosis;Support vector machine
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发布时间：2022-10-20 - 摘要：The cutting principle,design principle and the selection of the structure parameter of the shaving cutter are introduced,and taking the more common universal shaving machine YWA4232 in actual processing as example,the steps and formulas of general checking calculating of the plunge shaving cutter BE- 14-821 are described in detail. The problem existing in general calculation is solved,the manufacturing cycle is shorten and the cost of new purchase from shaving cutter consumption is reduced.关键词：Shaving cutter;Generality;Helix angle;Pressure angle
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发布时间：2022-10-20 - 摘要：The structure design of the shipborne / vehicleborne project is carried out,through the describing of the turntable design requirements,the whole physical structure style and characteristics are introduced.Meanwhile,considering the practical working conditions of the turntable,the impact and random vibration are simulated by using the FEA method. Then,by comparing the simulation result with the material performance of the turntable,it shows that the turntable structure design meets the requirement.关键词：Structure design;Turntable;Impact;Random vibration;FEA
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发布时间：2022-10-20 - 摘要：The parameterized geometric model of gear of helical gear limited slip differential is built by using CATIA software,which can modification quickly according to the input parameters that improved the design quality and efficiency greatly. After simplifying the geometric model of gears,its meshing contact analysis is carried out by using the finite element analysis method. The results show that the surface contact stress of design gear is far less than the material allowable contact stress,so gears won’t appear the contact fatigue damage,and the maximum bending stress position at gear root,and that is consistent with the actual situation and the maximum bending stress is less than the material allowable bending stress,so the design meets the requirements.关键词：Helical gear;Differential;Parameterization;Finite element
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发布时间：2022-10-20 - 摘要：In order to avoid result that cam follower could be vibrate on the condition bad stiffness or higher speed using routine cam motion law,the method of harmony synthesis is used. The motion output function is optimized with aim function which is ideal motion demands. Through the natural frequency of cam and angular frequency,the number of harmonic wave terms is determined. The coefficient of equation is solved. Taking the global indexing cam in the folding turret of YB49 as an esample,the design is carried out,the design result is compared with the previous cam in FC800,the value of maximum accelerated velocity and maximum velocity are declined. Comparing with the cam in the FOKCE701,the number of harmonic wave on the static state is same. So the method could be applied to the other high- speed cam.关键词：HS motion law;Harmony synthesis;Super high-speed packaging machine;Global indexing cam
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发布时间：2022-10-20 - 摘要：In order to solve the problem of existing beam pumping unit reducer,the belt transmission mechanism is difficult to meet the long stroke and low speed,the contradiction of the energy requirements and form a complete set of small power motor,and the start from zero and real- time detection of load records can be carried out. An energy- saving pulley gear reducer of beam pumping unit used for oilfield is developed.关键词：Belt drive;Reducer;Pumping unit;Research and development
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发布时间：2022-10-20 - 摘要：In order to analyze the reason of the hot- rolled segment plate generates cracks in long- term use,combining with the actual situation and using ANSYS,the thermal coupling model is established,and the temperature field and stress field in the using process are analyzed. The results show the main reason of the segment plate causing cracking is the temperature field and the inhomogeneity of the thermal stress field,the local regional focus stress and the thermal fatigue during the coiling process,and the methods and measures of improving and preventing the cracks are put forward.关键词：Segment plate;Coupling;Temperature field;Stress field
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发布时间：2022-10-20
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