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
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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
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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
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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
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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
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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
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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
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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
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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.
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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
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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
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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
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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
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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
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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
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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
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Research and development of multi stage gear transmission system box coupling dynamic modeling
Choy et al established the dynamic model of the transmission system by using the transfer matrix method and the dynamic
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Dynamic modeling of multistage gear transmission system box coupling
With the deepening of research and the improvement of computer performance, the research object of gear system dynamics has experienced
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Support reaction model of multi-stage gear bearing in shearer cutting section
Bearing is a standard part widely used in all kinds of mechanical equipment, and it is the key component to
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Problems in gear meshing excitation modeling
There are some problems in gear meshing excitation modeling ① The time-varying meshing stiffness and static transmission error are scalars
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Mechanical characteristic curve of multistage gear cutting motor in shearer cutting section
The cutting motor of shearer is squirrel cage three-phase asynchronous motor. The mechanical characteristics of cutting motor refer to the
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Multi stage gear meshing excitation modeling
As an elastic mechanical system, gear system produces vibration and noise problems under dynamic excitation. The dynamic excitation is the
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Load model of multistage gear drum in shearer cutting section
The drum bears the function of cutting coal. The load on the drum has an important impact on the stress
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Research status and problems of gear system dynamics
Gear system is the most widely used transmission system in all kinds of mechanical equipment. Its mechanical behavior and working
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Multi stage gear shaft model of shearer cutting part
Gear shaft is a solid or hollow cylindrical member with variable cross-section, and its finite element model can be established
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Research on fatigue damage of low speed and heavy load gears by foreign scholars
Shi uses the software perdynamic (PD), which is used to analyze the crack propagation in the fracture of engineering materials.
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Research significance of multi-stage gear transmission dynamics of shearer cutting part
The cutting part is the core part of the shearer’s function of cutting coal and loading coal. It is mainly
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Dynamic model of planetary gear train of shearer cutting part
According to Newton’s second law, the dynamic equation of the system is established as follows Where I (I = R,
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Fatigue crack growth behavior of low speed and heavy load gears
Huang believes that the dispersion of fatigue crack growth behavior should be accurately characterized in the structural integrity assessment based
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Multi stage gear transmission of shearer cutting part
Coal is China’s basic energy and important chemical raw materials. Coal industry is an important basic industry related to national
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Dynamic model of planetary gear train
The internal excitation of planetary gear train is complex, and the power transmission path changes with the turnover of planetary
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Research on fault mechanism of low speed and heavy load gear
Heavy duty gear is the core component of large equipment transmission, which is widely used in many industries such as
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Finite element polycondensation model of multi-stage gear rocker box in shearer cutting section
Firstly, the finite element model of rocker box is established in ABAQUS, and its mass matrix and stiffness matrix are
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Optimal design of bevel gear transmission mechanism
The function of bevel gear is to transmit the motion and power between two intersecting axes. Similar to cylindrical gears,
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Large deformation gear model
By using the lumped parameter method, a 12 degree of freedom dynamic model of a pair of fixed axis gears
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Finish machining of super large modified gear
From the point of view of the purpose of designing super large modified gear (medium hard tooth surface and medium
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Micro element load calculation of sheet gear pair
Taking any slice gear pair in Fig. 1 as an example, the calculation method of micro element meshing force FIJ
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Rough machining of super large modified gears
According to the characteristics and cutting pattern of hobbing super large modified gear, the maximum wear of hob occurs at
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Model description of large deformation gear
As shown in the figure is the schematic diagram of the large deformation gear model. In this model, the main