The dynamic characteristics of gear beating excitation
The rattling force of gear is another important source of vibration and noise of gear. It produces rattling sound of […]
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Side band frequency characteristics and mechanism of planetary gear meshing excitation modulation
(1) The distribution model of the frequency band law of planetary gear system is established, which mainly considers the number […]
Scientific
Vibration excitation and signal model of gear engagement
Transmission error is the main excitation of gear vibration. It combines the influence of meshing time-varying stiffness and manufacturing error, […]
Scientific
Optimization target setting of gear modification parameters based on genetic algorithm
For the set optimization objective, that is, the minimum peak peak te optimization of transmission error, it is not known […]
Scientific
The establishment of the analysis model of gear mesh excitation modulation sideband frequency
In the development of planetary gear drive, it is found that there is obvious noise in the bench test of […]
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Analysis of the characteristics and mechanism of the side band frequency of gear meshing excitation modulation
There are many meshing excitations in gear drive, such as planetary drive. There are often modulation phenomena between these excitation […]
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Drawing P-S-N curve of bending fatigue property of gear material by shot peening
According to the calculation results, the curve of bending P-S-N of two different process gears of 20crnimoh material is shown […]
Scientific
Microscopic morphology analysis of coal mill gear
The fracture specimens were cut at the gear break and cleaned several times, then the fracture morphology was analyzed.The micro-morphology […]
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Coal Mill 42CrMo Carburized Steel Gear
Coal mill is an important equipment in coal-fired units of thermal power plant, which breaks coal blocks into pulverized coal, […]
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Basic knowledge of gear (1)
What is the basic law of tooth profile engagement and what is the basic law of tooth profile engagement with […]
Scientific
The dynamic load on the gear system of the vehicle
The maximum dynamic meshing force and the dynamic load coefficient of the loaded gear are analyzed respectively. They can provide […]
Scientific
Optimization evaluation group of gear modification parameters based on genetic algorithm
1) Decoding According to the encoding mode, the chromosome bit string is decoded to obtain the shape modification quantity is, […]
Scientific
External excitation load of vehicle gear transmission system
The external excitation load of vehicle gear transmission system mainly includes engine input torque and load torque. The engine of […]
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Dynamic characteristics and noise reduction of gear drive error excitation
Starting from the error excitation of transmission in the direction of meshing line, taking the mechanical gearbox as the object, […]
Scientific
Optimization of gear modification parameters based on genetic algorithm
① Gene coding of modification parameters Four modification parameters of driving gear are defined as tooth height deflection (is δ), […]
Scientific
Dynamic bearing force of coupling model of gear transmission
The dynamic bearing force is an important parameter in the dynamic response. The dynamic characteristics of the gear system are […]
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Inherent modal analysis of coupling model dynamics of gear transmission
Modal analysis is based on the static finite element model. In the process of modal analysis, the natural characteristics (natural […]
Scientific
Dynamic Inherent Mode Analysis of Gear Drive Coupling Model
In the established five-gear manual transmission model, there is coupling of finite element model, and the number of degrees of […]
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Dynamic Model of Gear Drive System of Tracked Vehicle
From the analysis results, it can be seen that the influence of the degree of freedom of swing is relatively […]
Scientific
Dynamic Characteristic of Gear Drive Error Excitation Stiffness Matrix of Rolling Bearing
The stiffness matrix of the rolling bearing connects the relative displacement and deflection of the inner raceway to the center […]
Scientific
Hardness Test of Coal Mill Gear
Rockwell hardness tests were carried out on the surface and center of the intermediate shaft sun wheel at different points. […]
Scientific
Dynamic Modal Compliance Analysis of Gear Drive Coupling Model
Modal flexibility is the degree to which a modal frequency of the system is easily excited by the transmission error […]
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Arrangement of Measuring Points for Dynamic Characteristic Simulation of Gear Drive Error Excitation
In order to facilitate comparison with subsequent experimental verification, corresponding numbered nodes are defined on the model box, through which […]
Scientific
Dynamic Characteristics of Gear Drive Error Excitation Calculation Method of Gear Drive Error
There are several calculation methods for gear drive errors, including finite element method and empirical analysis method.The transmission error obtained […]
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Dynamic characteristics of gear friction excitation
(1) Starting from the friction excitation of the tooth surface, a six-degree-of-freedom accurate gear dynamic model considering the friction of […]
Scientific
Analysis and discussion of experimental results on dynamic characteristics of gear friction excitation
(1) Comparison between simulation and experiment Figure 1 compares the acceleration simulation and experimental results of pinion end with obvious […]
Scientific
Optimization model for static performance of involute spur gears
(1) Design variables The design variables of static performance optimization model and dynamic performance optimization model are the same. (2) […]
Scientific
Dynamic Characteristic of Gear Drive Error Excitation Shafting Timoshenko Beam Unit
The establishment of dynamic simulation model is completed by RomaxDesigner.In the model, the shafting is treated as a Timoshenko beam […]
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Dynamic Characteristic Analysis and Noise Reduction Research of Gear Drive Error Excitation
Gears transmit power between the main and passive gears by the meshing force on the tooth surface. The meshing force […]
Scientific
Application of 6-DOF Dynamic Model in Gear Industry
Then the engagement force Np, Ng and friction force Fp, Fg can be expressed as: Where: lambda (t) is the […]
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Experimental device for dynamic characteristics of gear friction excitation
The experiment is carried out on the FZG Standard Test stand, as shown in Figure 1. The modified A-gear with […]
Scientific
Comparison of Dynamic Characteristics of Gears with Different Tooth Surfaces under Different Factor Excitation
The dynamic simulation is carried out by using Benedict amp; Kelly model and time-varying friction coefficients obtained in Figure 2.8 […]
Scientific
Dynamic performance optimization model of involute spur gear profile modification
Based on the dynamic and static characteristics, the optimization model of tooth profile modification is established, and the optimization design […]
Scientific
Comparison of Dynamic Characteristics of Different Friction Models of Gears Excited by Different Factors
First, the differences of gear dynamic characteristics with different friction models are discussed.Figures 1 and 2 show the time and […]
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Time-varying friction coefficient of gear driven by different factors and its calculation model
The friction coefficient of tooth surface is affected by many factors, which will change with meshing position, lubrication state and […]
Scientific
Time-varying meshing stiffness and friction arm of gear driven by different factors
The fluctuation of gear meshing stiffness is an important excitation source for gear vibration. Accurate calculation of gear meshing stiffness […]
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Research progress on thermal behavior of gear system
Gear system thermal behavior plays an important role in high-speed and heavy-load gear transmission, affecting the strength, life and safety […]
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Profile modification of high-speed heavy-load gear drive
Profile modification is an effective method to reduce gear vibration, noise and thermal bonding failure. Profile modification can correct load […]
Scientific
6-DOF Gear Dynamics Model
In order to study the comprehensive influence of meshing force and friction force on tooth surface, a simplified dynamic model […]
Scientific
Gear engagement process analysis
Firstly, the engagement process of the gear is analyzed. The engagement state and force diagram of the gear is shown […]
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Establishment of dynamic model for gear friction excitation
In addition to causing translation vibration of gear along the vertical engagement line, the friction moment will also form to […]
Scientific
The influence of the modification quantity on the dynamic load of the involute spur gear under different modification types
Analyze the time-domain curve of meshing stiffness and meshing force of the gear under the optimal modification amount, and compare […]
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Comprehensive Research on Thermal Behavior of Gear System
The thermal behavior of gear system is comprehensively studied.Based on thermal design and thermal check of gear transmission system, a […]
Scientific
The influence of the modification quantity on the dynamic load of the involute spur gear under different modification types
The modification length is 2.8mm, the change range of modification amount is [0, 0.05mm], and the value interval is 0.02mm. […]
Scientific
Types of profile modification for involute spur gear drive system
There are many types of profile modification curves. According to the different functional forms of the modification quantity with respect […]
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Profile modification of involute spur gear drive system
Determining the profile modification quantity is a complicated problem. If the profile modification quantity is too large, the coincidence degree […]
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Current situation of dynamic research on friction excitation of gear tooth surface
Tooth surface friction is a force formed by the relative sliding between the two contact tooth surfaces of a gear […]
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Research on Gear Drive Power Excited by Different Factors
Gear drive system is a complex structure system which includes gear pair, drive shaft, bearing, box and other components. The […]
Scientific
Effect of Center Support Stiffness of Gear Drive System on Dynamic Load under Steady State Conditions
The center support stiffness is selected according to the allowable deflection of the drive shaft. The center support stiffness meets […]
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Profile modification of involute spur gear drive system
For single-stage gear drive system, the influence laws of dynamic load and its parameters are analyzed under steady-state and no-load […]
Scientific
Impact test of coal mill gear
Cut and process the inspection gear along the axial direction and about 1/4 diameter into U-type impact test specimen, and […]
Scientific
Experimental results and data processing of shot peening on bending fatigue properties of gear materials
1. Group test results Data of fatigue test results obtained by group method of shot peened gear and non shot […]
Scientific
Test of shot peening on bending fatigue property of gear material
1. Test method The bending fatigue test fixture of gear material adopts the single tooth loading method shown in Figure […]
Scientific
Effect of shot peening on bending fatigue of gear material
Bending fatigue performance is an important index to evaluate the bearing capacity of gears. Shot peening is an effective way […]
Scientific
Comparison and Analysis of Different Dynamic Modes of Gear Drive System under Steady State Conditions
In the nonlinear dynamic model of yaw-torsion coupling, there are two main factors affecting the yaw vibration, i.e. the bias […]
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Nonlinear Vibration Characteristics of Involute Spur Gear Drive System
For single-stage gear drive system, engine excitation is taken as input condition, dynamic characteristics and parameter influence rules under steady-state […]
Scientific
Metallographic Structure Analysis of Coal Mill Gear
Metallographic structure evaluation of failed gears is carried out according to national inspection standards.The metallographic observation is etched with 4% […]
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Stress Analysis of Coal Mill Gear
The vertical coal mill is shown in Figure 1.Reducer is an important part of coal mill and is mainly used […]
Scientific
Effect of Tooth Tip Circular Radius of Spiral Bevel Gear on Tooth Root Bending
There are three aspects to consider when designing the tip radius: (1) No interference occurs in the running process of […]
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Design route of mechanical process for double drive gear
Process routing design in machining.In order to ensure that the geometrical shape, dimension measuring accuracy, position moving accuracy and various […]