Research on Modeling and Simulation of early micro pitting failure of gears
In the past research on the dynamics of gear system with pitting corrosion fault, the main concern is that the […]
In the past research on the dynamics of gear system with pitting corrosion fault, the main concern is that the […]
In the whole meshing area of gear pair, the meshing point of error free gear transmission is always on its
The gear pitting failure is studied experimentally. Tan CK et al. Accelerated the occurrence of gear pitting failure by using
In the past work, the main factors to be considered in the dynamic modeling of gear system with pitting corrosion
The finite element method is used to verify and calculate the time-varying meshing stiffness of gears. In reference [29], chaari
Gear transmission system is a typical elastic mechanical transmission system, which produces dynamic response under the influence of internal and
It is the central task of gear system dynamics to establish accurate dynamic model of gear system. Only by establishing
The tooth surface pitting fault is a common failure form of gear system. In the modeling of gear pitting fault,
When the gear system has tooth profile error, tooth surface roughness is too high, the lubricating oil film is too
Gear box is the most commonly used power and motion transmission device in mechanical equipment. Gear transmission has many advantages
The existing research on the dynamics of noncircular gears can be roughly divided into two categories: rigid dynamics and elastic
Noncircular gear is a kind of precise transmission mechanism which can realize the complex functional relationship between driving wheel and
What is the equivalent gear and equivalent number of teeth of helical gear? What is the purpose of equivalent number
How to determine the minimum number of teeth without undercutting for standard external gear? Answer: it is determined by Zmin
In the process of calculating the meshing stiffness of gears with energy method, the gear teeth are usually assumed to
What is a standard gear? Answer: m, α, h * a, c * are standard values, and S = e
Gear profile modification is an effective method to obtain better meshing contact characteristics and dynamic characteristics by trimming the profile
In engineering design, there are many very complex optimization problems, which are often difficult to find the optimal solution by
Among domestic scholars, Feng Qi and others have studied the slapping vibration of random AM secondary drive, directly adopted non-Gauss
When a gear system is running at a low speed, a “rattling” gear knock, called rattling, often occurs.The decibel value
In domestic research, Wang Sanmin et al. established a sub-non-linear dynamic model. By means of numerical calculation, the influence of
In 1991, Ozguven analyzed the non-linear dynamic characteristics of spur gear with six-degree-of-freedom non-linear bending-torsion coupling model, based on the
According to the meshing principle and gear dynamics theory, the multi parameter variable vibration model of the new type of
The speed reduction integrated gear integrates the transmission characteristics of non-circular gear and face gear, and can realize the variable
The further application of face gear benefits from the following researchers. Zhao et al. Broke through the traditional mode and
The research on dynamic characteristics and dynamics of gear transmission system has been gradually developed from static analysis to dynamic
On the basis of previous studies, some scholars have added the influence of other parts of the system, such as
a. The curves of bending P-S-N of 20crnimoh material with different survival rates of shot peened and non shot peened
The reducer variable speed integrated gear is put forward on the basis of face gear and non-circular gear characteristics. The
a. In gear manufacturing, two kinds of test gears adopt the same material, the same machining and heat treatment process,
The rattling force of gear is another important source of vibration and noise of gear. It produces rattling sound of
(1) The distribution model of the frequency band law of planetary gear system is established, which mainly considers the number
There are many meshing excitations in gear drive, such as planetary drive. There are often modulation phenomena between these excitation
According to the calculation results, the curve of bending P-S-N of two different process gears of 20crnimoh material is shown
Coal mill is an important equipment in coal-fired units of thermal power plant, which breaks coal blocks into pulverized coal,
What is the basic law of tooth profile engagement and what is the basic law of tooth profile engagement with
Starting from the error excitation of transmission in the direction of meshing line, taking the mechanical gearbox as the object,
Modal analysis is based on the static finite element model. In the process of modal analysis, the natural characteristics (natural
From the analysis results, it can be seen that the influence of the degree of freedom of swing is relatively
In order to facilitate comparison with subsequent experimental verification, corresponding numbered nodes are defined on the model box, through which
(1) Starting from the friction excitation of the tooth surface, a six-degree-of-freedom accurate gear dynamic model considering the friction of
Gears transmit power between the main and passive gears by the meshing force on the tooth surface. The meshing force
The experiment is carried out on the FZG Standard Test stand, as shown in Figure 1. The modified A-gear with
The friction coefficient of tooth surface is affected by many factors, which will change with meshing position, lubrication state and
Gear system thermal behavior plays an important role in high-speed and heavy-load gear transmission, affecting the strength, life and safety
Profile modification is an effective method to reduce gear vibration, noise and thermal bonding failure. Profile modification can correct load
In addition to causing translation vibration of gear along the vertical engagement line, the friction moment will also form to
The thermal behavior of gear system is comprehensively studied.Based on thermal design and thermal check of gear transmission system, a
Determining the profile modification quantity is a complicated problem. If the profile modification quantity is too large, the coincidence degree
Tooth surface friction is a force formed by the relative sliding between the two contact tooth surfaces of a gear
Gear drive system is a complex structure system which includes gear pair, drive shaft, bearing, box and other components. The
For single-stage gear drive system, the influence laws of dynamic load and its parameters are analyzed under steady-state and no-load
For single-stage gear drive system, engine excitation is taken as input condition, dynamic characteristics and parameter influence rules under steady-state
The vertical coal mill is shown in Figure 1.Reducer is an important part of coal mill and is mainly used
Process routing design in machining.In order to ensure that the geometrical shape, dimension measuring accuracy, position moving accuracy and various
1. Material Selection of Blank The mechanical gear blank is simple in structure and small in size, and it has
The blank is determined to be abrasive forging. After cleaning, the blank is positive-heat quenched and ground to effectively eliminate
The locating elements for spiral bevel gears are V-shaped blocks and press plates. After positioning the workpiece, before drilling, it
Gear is an important basic component in mechanical transmission. Different from other types of gears, bevel gear, as a special
The positioning of the workpiece is achieved by the contact between the positioning surface on the workpiece and the V-block