Research Status of Gear Slap Dynamics Abroad
When a gear system is running at a low speed, a “rattling” gear knock, called rattling, often occurs.The decibel value […]
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
Compared with traditional cutting process, the hot precision forging cold extrusion compound forming process has the advantages of high efficiency,
The advantages of forming cylindrical gears by plastic forming are as follows: 1) Productivity.Taking the small module gear used in
Gears are wheel-shaped mechanical parts that transmit torque by whistling closure of teeth.Gears can change speed and torque, direction of
Gear drive system is widely used in various mechanical equipment because of its accurate transmission ratio, stable and reliable, long
Gear drive system is the core mechanism of mechanical equipment and the main equipment to determine the performance of the
Process analysis: The processing of spiral bevel gears is mainly divided into the following stages: 1) Billet processing: Billet forming
(1) Deep analysis of tooth bias torque caused by deformation of drive shaft and bearing and tooth error is introduced
For tracked vehicle gear drive system, firstly, the dynamic loads of main components in different gears are compared and analyzed;
For the gear transmission system of tracked vehicles, a nonlinear dynamic model of lateral torsional coupling is established. Combined with
Firstly, under the quasi-static condition, the influence of tooth profile modification parameters on meshing stiffness and load distribution coefficient between
ISIGHT software is a multi-disciplinary optimization software which integrates industrial optimization design and automatic analysis and calculation, which is introduced
Fixture positioning and fixture fixture fixture fixture is very important in the process of parts machining. If positioning is not
The relationship between dynamic load of gear drive system and modification parameters is very complex. When two or more modification
There are three ways of tooth profile modification: cutting or grinding a part near the top of the tooth, which
1 Selection of Rough Benchmarks The principle of choice is: (1) Non-machined surface principle. (2) The principle of minimum machining
The time history of each variable can be obtained directly by numerical integration. The response type of the system can
In order to guarantee the normal operation and use of the double gear effectively and facilitate material processing, the height
At present, the materials for spiral bevel gear are 20CrMnTi, 22CrMoH, etc. They are widely used in high-speed, medium or
No-load knocking of gears is one of the important sources of vehicle knocking noise. No-load knocking usually occurs in two