Simulation calculation and result analysis of involute spur gear wear
In order to verify the simulation model, the minimum oil film thickness is far less than the root mean square […]
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Physical and chemical detection and analysis of fracture cause of engine starter motor drive gear
1.Fracture morphology analysis 1.1 macroscopic observation of fracture The three teeth of the driving gear of the starting motor are […]
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Friction simulation analysis of meshing stiffness of gear transmission system
The basic parameters of gear pair 2 are selected to calculate and analyze the time-varying meshing stiffness with friction effect. […]
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Simulation and discussion of time-varying meshing stiffness of finite element gear pair
The quasi-static calculation method is adopted in the finite element simulation calculation, that is, the stiffness under the load at […]
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Basic wear model of involute spur gear
In the meshing process of gear pair, the relative sliding and rolling occurs between the meshing tooth surfaces, which causes […]
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Calculation and analysis of comprehensive time-varying meshing stiffness
According to the two models of contact stiffness calculation, the following are calculated and discussed respectively. Firstly, according to the […]
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Measurement of involute profile error of helical gear
The measurement can be divided into two cases: the measurement of the profile error of the end face on the […]
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Calculation and analysis of stiffness of meshing contact matrix of gear tooth surface
As one of the important components of gear stiffness, it is very important to calculate the matrix stiffness reasonably and […]
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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 […]
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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 […]
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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 […]
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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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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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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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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 […]
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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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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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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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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 […]
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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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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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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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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 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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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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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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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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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 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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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 […]
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Optimization design example of bevel gear transmission mechanism
It is known that the transmission mechanism of an automobile engine is a closed bevel gear transmission mechanism with 90 […]
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Mathematical model of optimum design for bevel gear transmission mechanism
In the optimization design of bevel gear transmission mechanism, the minimum volume sum of bevel gear pair is taken as […]
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Segmented hobbing of super large modified gear with standard hob
Firstly, the difference Δ n (that is, Δ n = N-N) between the minimum number of effective axial cutter teeth […]
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Theoretical length of hob for cutting metal in gear slot
In Figure 1, at the cutting end of the hob, although the hob teeth beyond the meshing length LM do […]
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Theoretical hob length for enveloping gear profile
The analysis and calculation of the cutting edge length of hob is not important for the gear with medium and […]
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Correction of installation angle λ of hob for super large modified gear hobbing
The practice shows that using standard hob to gear hobbing this kind of gear with incorrect method may cause abnormal […]
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Case analysis of gear fault based on morphological wavelet and fuzzy entropy
In order to verify the superiority of fuzzy entropy in the fault classification of transmission gears, based on the gear […]
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Application of fuzzy entropy in gear fault classification
Suppose that the original time series of gear fault signal is: [x (n)] = x (1), X (2) Then the […]
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Application of morphological wavelet in gear fault classification
Morphological wavelet is a non-linear extension of traditional linear wavelet based on mathematical morphology. Mathematical morphology and its related operators […]
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Stress intensity factor of helical gear root crack and influence of J-integral simulation position
Three dimensional crack models at different positions are established on the helical gear, and the stress intensity factor and J-integral […]
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Stress intensity factor of helical gear root crack and influence of J-integral simulation length
In order to study the effect of crack length on stress intensity factor and J-integral, the above semi elliptical initial […]
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Stress intensity factor of helical gear root crack and influence of J-integral simulation load
After the three-dimensional model of the gear is established, the material used in gear simulation is 17CrNiMo6, and then the […]
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Contact stress response characteristics of gear under fatigue pitting
As shown in the figure, the maximum contact stress response curves of the tooth surface without pitting and with pitting […]
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The helical gear model with initial crack is established
In order to analyze the three-dimensional crack model of helical gear root, a pair of three-dimensional helical gear models need […]