It is well known that the optimum amount of tooth direction modification varies with the meshing tooth direction error and […]
Adjust the synchronous speed of the motor so that the speed of the motor under rated load can be increased
Adjust the synchronous speed of the motor to 150, 500, 750, 1250, 1470, 1750 and 2000 R / min respectively
Vibration acceleration is the most direct phenomenon caused by the dynamic load of the system. At the same time, the
Fig. 1 (a) and (c) respectively show the dynamic reaction curve of the front and rear bearing 1 of the
Fig. 1 (a) and (c) show the dynamic meshing force curves of the front and rear gear pair 1 of
Dynamic load is the direct cause of vibration and fatigue failure of transmission system. Analyzing the dynamic load of each
Involute gear has the characteristic that the center distance changes while the transmission ratio remains unchanged, so the center distance
Figure 1 shows the comparison of the center motion track of the driving and driven gears of the front and
When shearer cuts coal, the rocker box will produce complex three-dimensional dynamic deformation under the joint action of internal and
The main research contents are as follows: 1) The natural vibration characteristics of the coupled system are solved and the
Firstly, the natural vibration characteristics of the coupled system are solved. By simplifying the dynamic equation of multi-stage gear transmission
Multi stage gear transmission is a system composed of cutting motor, cutting transmission system and cutting roller, which is used
Mode (including natural frequency and mode) is the inherent property of multi degree of freedom system. It describes the natural
Bearing is a standard part widely used in all kinds of mechanical equipment, and it is the key component to
The cutting motor of shearer is squirrel cage three-phase asynchronous motor. The mechanical characteristics of cutting motor refer to the
The drum bears the function of cutting coal. The load on the drum has an important impact on the stress
Gear shaft is a solid or hollow cylindrical member with variable cross-section, and its finite element model can be established
According to Newton’s second law, the dynamic equation of the system is established as follows Where I (I = R,
The internal excitation of planetary gear train is complex, and the power transmission path changes with the turnover of planetary
Firstly, the finite element model of rocker box is established in ABAQUS, and its mass matrix and stiffness matrix are
By using the lumped parameter method, a 12 degree of freedom dynamic model of a pair of fixed axis gears
Taking any slice gear pair in Fig. 1 as an example, the calculation method of micro element meshing force FIJ
As shown in the figure is the schematic diagram of the large deformation gear model. In this model, the main
It is known that the transmission mechanism of an automobile engine is a closed bevel gear transmission mechanism with 90
In the optimization design of bevel gear transmission mechanism, the minimum volume sum of bevel gear pair is taken as
Firstly, the difference Δ n (that is, Δ n = N-N) between the minimum number of effective axial cutter teeth
In Figure 1, at the cutting end of the hob, although the hob teeth beyond the meshing length LM do
The analysis and calculation of the cutting edge length of hob is not important for the gear with medium and
The practice shows that using standard hob to gear hobbing this kind of gear with incorrect method may cause abnormal
In order to verify the superiority of fuzzy entropy in the fault classification of transmission gears, based on the gear
Suppose that the original time series of gear fault signal is: [x (n)] = x (1), X (2) Then the
Morphological wavelet is a non-linear extension of traditional linear wavelet based on mathematical morphology. Mathematical morphology and its related operators
Three dimensional crack models at different positions are established on the helical gear, and the stress intensity factor and J-integral
In order to study the effect of crack length on stress intensity factor and J-integral, the above semi elliptical initial
After the three-dimensional model of the gear is established, the material used in gear simulation is 17CrNiMo6, and then the
As shown in the figure, the maximum contact stress response curves of the tooth surface without pitting and with pitting
In order to analyze the three-dimensional crack model of helical gear root, a pair of three-dimensional helical gear models need
As shown in the figure, the DTE response curves without pitting and with pitting are drawn. Due to the periodic
According to the measured value of stress intensity factor, kmax and Kmin can be obtained, and the range of stress
The tooth surface pitting model can be established through the gear modification parameter module in Fig. 1. By defining the
If the stress state of the crack and the displacement direction of the crack surface are taken as the classification
In order to explain the influence of different deviation values on the contact line error and tooth profile of cylindrical
In the transmission process, the contact area on the traditional gear tooth surface is a space surface, and the accuracy
In the process of cylindrical gear form grinding, the tooth surface equation of the machined cylindrical gear can be determined
The machining coordinate system of cylindrical gear grinding with form grinding wheel is established, as shown in Figure 1. In
In the process of transmission, the contact line of the line gear is formed by the motion track of the
Rack and pinion actuator is the most commonly used pneumatic actuator. The middle of the cylinder is connected with the
When the input speed frequency is 10Hz, the displacement response of master-slave gear XP is selected as the analysis object.
From the point of view of simplification, because the gear shaft of C6136A lathe feed box is a stepped shaft,
Based on the introduction of the corresponding mathematical model and application scenarios proposed for the dynamic physical model of gear
In order to reduce the input of parameters in numerical simulation, the mathematical model of dimensional normal load is obtained
Before determining the speed of the gear shaft of the feed box, the speed of the main shaft must be
The loosening of the valve clamping part adopts the gear ring transmission mode. The gear ring transmission ratio is constant,
Firstly, the 3D complex model (such as chamfering and other details) is simplified in order to reduce the difficulty of
For each part of the design requirements should meet the size of the installation, power standards, long life and so
The results of finite element analysis show that: When the rotation angle of the input end is between 0.64 rad
The planetary gear hub of planetary gear output type planetary gear transmission system consists of six circumferential uniformly distributed transmission
Due to the manufacturing accuracy, installation error, lubrication requirement and space reserved for the thermal expansion of gear teeth, the
Lyapunov exponent represents the average exponential divergence rate of the distance between two adjacent trajectories in the phase plane with
