Research status of gear root crack in China
Domestic scholars have also carried out relevant research on the root crack fault mechanism. Shao Renping established the gear dynamic […]
Domestic scholars have also carried out relevant research on the root crack fault mechanism. Shao Renping established the gear dynamic […]
In the process of gear meshing, the loaded tooth is like a cantilever beam. The pulse cyclic stress on the
Domestic scholars have also done related work in the development of gear transmission system. Zhu Qin and Xie Longbai established
Tupin put forward the concept of equivalent meshing stiffness for the first time and established the dynamic model of gear
Gear transmission system dynamics mainly studies the mechanical behavior of gear transmission motion and power process, including research on dynamic
Gear transmission is an important part of mechanical transmission. It has the advantages of compact structure, high transmission efficiency, long
Rad and forouzan et al. Used XFEM extended finite element method to analyze the propagation path of helical gear root
Lewicki explored the law of fracture and crack generation of two-dimensional gear teeth, and proposed a super safety design concept.
Helical gear is widely used in high-speed and heavy-duty transmission because of its smooth transmission, strong bearing capacity, low noise,
Miryam and pedrero et al. Proposed a model which can be used to calculate the bending fatigue stress of gear
In most cases, the failure of gear teeth is the result of damage accumulation. Due to the different manufacturing processes
Although the vibration characteristics of high-speed helical gear transmission of an electric vehicle reducer are studied, some practical conclusions are
Taking the high-speed helical gear transmission of an electric vehicle reducer as the research object, firstly, the time-varying meshing stiffness
Dynamic modeling is the basis of simulation analysis. The simulation model of high-speed helical gear transmission system of an electric
The main error items of gear are: base pitch deviation Δ FPB, tooth profile error Δ FF, tooth alignment error
In the whole meshing area of gear pair, the meshing point of error free gear transmission is always on its
Taking the high-speed helical gear transmission of an electric vehicle reducer as the research object, the vibration characteristics of the
(1) At present, there are many methods to calculate the meshing stiffness of gears. For spur gears, helical gears and
Gear transmission system is a complex system with multiple excitation factors coupling each other. Considering all the internal and external
In the actual process of gear meshing transmission, due to the manufacturing error and tooth deformation of the gear, the
In the early research, due to the limitation of computational resources and methods, the time-varying meshing stiffness of gears can
The meshing stiffness of gears refers to the ability of gear teeth to resist elastic deformation under the action of
Due to its advantages in efficiency, service life and application range, gear transmission has become an indispensable part of the
As the most commonly used motor centralized drive transmission system of electric vehicles, the motor is directly connected with the
The transmission system of automobile is one of the core competitiveness of automobile. The transmission system of traditional fuel vehicle
When there is pitting on the gear surface, the pitting will reduce the time-varying meshing stiffness and the sliding friction
The experimental platform for measuring the dynamic strain of gear tooth root is built, and the dynamic strain of gear
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