Tooth surface inspection of hourglass worm gear
The enveloping hourglass worm with variable tooth thickness involute gear is a new type of worm. At present, there is […]
Scientific
Scientific
Signal analysis of planetary gearbox
The vibration signal of gearbox can directly reflect its operation status, so the gearbox fault diagnosis based on vibration signal […]
Scientific
Calculation of load ratio and normal load of meshing contact stiffness of gear tooth surface
According to the semi empirical formula model, the contact stiffness is related to the contact load. According to the description […]
Scientific
Sample inspection of hourglass worm gear tooth surface
Based on the above measurement principle, the milling involute enveloping hourglass worm sample shown in Figure 1 is tested in […]
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Study on pitting corrosion dynamics of gear transmission system
Liang et al. established three preset models for pitting at different point erosion degrees: mild pitting, moderate pitting and severe […]
Scientific
Milling of enveloping hourglass worm tooth surface of involute gear with variable tooth thickness
The accurate three-dimensional model of variable tooth thickness involute gear enveloping hourglass worm is established. In the five axis linkage […]
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Research on time-varying meshing stiffness of gears by test method and coupling method
The test method usually adopts quasi-static analysis conditions, which can accurately calculate the TVMs of gear meshing pair. In practical […]
Scientific
Influence of geometric parameters on gear tooth stiffness
Gear pair 2 is selected to study and analyze the effect of gear geometric parameters on tooth stiffness. The curve […]
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Research on tooth surface of enveloping hourglass worm with variable tooth thickness involute gear
In variable tooth thickness involute gear enveloping hourglass worm gearing, the worm gear is variable tooth thickness involute gear with […]
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Study on Time-varying Meshing Stiffness of Gear by Finite Element Method
Finite element method (fem) is to the gear body and tooth discrete into tiny unit elastic body, and through the […]
Scientific
Simulation analysis of gear tooth profile
The gear pair parameters are selected for tooth stiffness simulation analysis. The selected gear pair parameters cover two different tooth […]
Scientific
Meshing motion process and rotation angle relationship of gear pair
In order to further calculate the meshing interval expression of gear in a single period from meshing in to meshing […]
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Research results of dynamics model of gear transmission system under fatigue pitting of tooth surface
He et al. extended the two-stage gear reducer dynamics model on the single-stage gear dynamics model, and studied the influence […]
Scientific
Meshing motion process and limit boundary of gear pair
According to the spatial meshing principle of involute spur gear, when a pair of standard involute tooth profiles are meshed, […]
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Research results of dynamics model of industrial gear transmission system
Zhou jian magnitude to a gear mesh type bending – twist mechanical model considering the meshing stiffness and error of […]
Scientific
The basic theory of gear meshing stiffness is deduced by energy method
According to the theory of mechanics of materials and elasticity, a beam/bar with equal section length of Z is taken […]
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Dynamics model of gear transmission system
For gear transmission system dynamics by physical model to the transformation of the mathematical model, and to establish the mathematical […]
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Establishment of contact finite element model of low speed and heavy load gear
The low-speed and heavy-duty gear assembly established by SolidWorks is exported to. Step format and imported into ANSYS Workbench. The […]
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Prospect of rocker box and multistage gear transmission of shearer cutting part
A series of research work has been carried out on the dynamic modeling analysis and dynamic performance optimization of multi-stage […]
Scientific
Explanation on the cause of fatigue pitting of gear drive system
When the cyclic contact stress on the tooth surface exceeds the fatigue limit of the material, a micro crack appears […]
Scientific
Parametric modeling of low speed and heavy load gear based on SolidWorks
The accurate modeling of gear is an important basis for analyzing the contact stress and crack propagation law of gear. […]
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Innovation of rocker box and multistage gear transmission of shearer cutting part
① Aiming at the problems of modeling difficulty and low computational efficiency of multi-stage gear system dynamics, an efficient general […]
Scientific
Comparison of two different gear profile modification criteria
Reducing the fluctuation of static transmission error is a well-known tooth profile modification criterion, but in practice, there are not […]
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Parametric modeling and dynamic meshing analysis of low speed and heavy load gears
In the dynamic analysis of gear, the modeling process is very important. With the development of science and technology, there […]
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Crack propagation law of low speed and heavy load gears
The research content of gear crack and the research status of gear stress intensity factor at home and abroad are […]
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Research on rocker box and multi-stage gear transmission of shearer cutting part
With the continuous increase of mining depth, the geological characteristics of high ground stress and strong mining disturbance in deep […]
Scientific
Influence factors and laws of optimum tooth profile modification parameters of multistage gear transmission system
As shown in Figure 1, it is the contour map of CHTE under different profile modification parameters of gear pair […]
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Research status of stress intensity factors for low speed and heavy duty gears
Under the action of long-term repeated load, gear is easy to produce fatigue microcracks, which leads to the decrease of […]
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Dynamic characteristics and crack propagation path of low speed and heavy load gears
In order to solve the problems of dynamic characteristics and crack propagation path of low-speed and heavy-duty gears, the main […]
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Structure optimization of rocker arm box of shearer cutting part and 3D topological modification of multi-stage gear
The dynamic performance of shearer cutting part is improved from two aspects of rocker box structure optimization and multi-stage gear […]
Scientific
The influence factors and rules of optimum tooth direction drum repair in multistage gear transmission system
It is well known that the optimum amount of tooth direction modification varies with the meshing tooth direction error and […]
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Coupling dynamic characteristics of multistage gear transmission and rocker box
By means of natural vibration analysis and system dynamics simulation, the coupling dynamic characteristics of multi-stage gear transmission and rocker […]
Scientific
Coupling dynamic characteristics of multi stage gear transmission system under speed up condition
Adjust the synchronous speed of the motor so that the speed of the motor under rated load can be increased […]
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Research on the method of gear crack propagation
There are many methods to study the crack propagation of gears. The following summarizes four common methods to simulate the […]
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Research status of low speed and heavy load gear crack
The crack propagation of gear can be divided into three stages: the first stage, crack initiation stage; The second stage […]
Scientific
Coupling dynamic characteristics of multistage gear transmission system at fixed speed
Adjust the synchronous speed of the motor to 150, 500, 750, 1250, 1470, 1750 and 2000 R / min respectively […]
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Dynamic characteristics of multi-stage gear box coupling at different speeds
The dynamic response characteristics of shearer cutting part under rated working condition are analyzed, and the dynamic deformation and dynamic […]
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Wide application of low speed and heavy load gear transmission system
Low speed and heavy load gear transmission system is widely used in every lifeline of national economy, such as gantry […]
Scientific
Vibration response of multistage gear in shearer cutting section
Vibration acceleration is the most direct phenomenon caused by the dynamic load of the system. At the same time, the […]
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Dynamic characteristics of multi-stage gear transmission box coupling in shearer cutting section
Shearer cutting part is a rocker gear box. The rocker box is a hollow cantilever structure, the free end of […]
Scientific
Support reaction force of multistage gear bearing in shearer cutting part
Fig. 1 (a) and (c) respectively show the dynamic reaction curve of the front and rear bearing 1 of the […]
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The gear dynamic model adopts the hypothesis of small deformation
In dynamic modeling, the cutting part of shearer is divided into two parts: transmission system and rocker box. The transmission […]
Scientific
Dynamic meshing force of multistage gears in shearer cutting section
Fig. 1 (a) and (c) show the dynamic meshing force curves of the front and rear gear pair 1 of […]
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Dynamic modeling of multi-stage gear transmission box coupling for shearer cutting part
Dynamic modeling is the basis of gear system dynamics research. From the perspective of gear dynamics, the cutting part of […]
Scientific
Dynamic meshing force and dynamic tooth force of multistage gears in shearer cutting section
Dynamic load is the direct cause of vibration and fatigue failure of transmission system. Analyzing the dynamic load of each […]
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Technical route of dynamic research on multistage gear of shearer cutting part
Shearer cutting part is a multi-stage gear transmission system supported by rocker box, which has many parts and complex structure. […]
Scientific
Center distance of multistage gear pair in shearer cutting part
Involute gear has the characteristic that the center distance changes while the transmission ratio remains unchanged, so the center distance […]
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Problems in dynamic research of multi stage gears in shearer cutting section
Based on the multi-body dynamics commercial software ADAMS simulation platform and considering the dynamic characteristics of the rocker box and […]
Scientific
Multi stage gear center trajectory of shearer cutting part
Figure 1 shows the comparison of the center motion track of the driving and driven gears of the front and […]
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Study on dynamics of multistage gears in shearer cutting section
The research on gear dynamics of shearer cutting part started late at home and abroad, and the main achievements were […]
Scientific
Dynamic deformation of multistage gear in shearer cutting section
When shearer cuts coal, the rocker box will produce complex three-dimensional dynamic deformation under the joint action of internal and […]
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Research on tooth profile modification of multistage gears
Profile modification is to modify the helical angle or axial profile of the gear according to the predetermined law according […]
Scientific
Influence of stiffness of multi-stage gear coupling bearing of shearer cutting part on natural vibration characteristics of coupling system
The main research contents are as follows: 1) The natural vibration characteristics of the coupled system are solved and the […]
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Research on profile modification of multistage gears
Profile modification is to remove trace material from the tooth surface along the direction of tooth height, so as to […]
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Bending fatigue test method of low speed and heavy load gears
The bending fatigue test was designed and completed according to GB / T 14230-1993. In the bending fatigue test, according […]
Scientific
Vibration mode of multistage gear coupling system in shearer cutting section
Firstly, the natural vibration characteristics of the coupled system are solved. By simplifying the dynamic equation of multi-stage gear transmission […]
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Dynamic performance optimization of multistage gear system
The design of gear system is not limited to the static strength check, but the important content is to consider […]
Scientific
Natural vibration characteristics of multistage gear transmission in shearer cutting section
Multi stage gear transmission is a system composed of cutting motor, cutting transmission system and cutting roller, which is used […]
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Problems in dynamic modeling of multistage gear transmission system box coupling
It should be noted that the dynamic substructure method is mainly convenient to establish the coupling dynamic model of the […]
Scientific
Analysis on natural vibration characteristics of multistage gear transmission in shearer cutting section
Mode (including natural frequency and mode) is the inherent property of multi degree of freedom system. It describes the natural […]