Statistical analysis of crack length and fatigue life of low speed and heavy load gears
For the statistical analysis of this section, the relevant data of stress ratio r = 0.6 is also used. The […]
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Effect of lubrication contact on gear pitting load condition
According to the theory of elastohydrodynamic lubrication, the lubricant entering into the crack will form a certain pressure inside the
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Statistical analysis of crack length and crack tip stress intensity factor of low speed and heavy load gears
In order to verify the accuracy of the fatigue crack growth test of the compact tensile specimen, the data of
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Analysis of stress intensity factor at crack tip of low speed and heavy load gear
The theoretical Mises stress nephogram distribution law of the numerical simulation model of compact tensile specimen under macro state is
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Experimental verification of gear residual life
1. Data acquisition In the experiment, the gear fatigue life test-bed as shown in Figure 1 is used to monitor
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Establishment of fatigue crack propagation model for low speed and heavy load gears
The model used for numerical simulation of fatigue crack growth is the same as that of 42CrMo steel compact tensile
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T-sne dimension reduction analysis of shearer rocker gear fault
In order to more clearly reflect the output classification status of features in each layer of RESNET model, t-sne technology
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Fatigue life analysis of low speed and heavy load gears
With the continuous progress of the test, under the action of cyclic load, cracks appear on the sample and continue
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Analysis of relationship between crack tip stress intensity factor and propagation rate of low speed and heavy load gear
The fatigue crack growth rate DA / D N and the stress intensity factor at the crack tip under different
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Analysis of the relationship between crack length and stress intensity factor at crack tip of low speed and heavy load gea
The data of crack tip stress intensity factor (SIF) and crack length under different stress ratios collected through the test
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Test method of fatigue crack propagation for 42CrMo steel low speed and heavy load gear
The fatigue crack growth test of compact tensile specimen was carried out according to the national standard GB / T
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Analysis on dynamic load coefficient of meshing force of parallel planetary gears
The maximum meshing force reflects the maximum load of planetary gear. The dynamic load coefficient is the ratio of the
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Compact tensile test equipment for 42CrMo steel low speed and heavy load gear
The fatigue crack growth test was carried out in the State Key Laboratory of new metal materials, University of science
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Analysis of maximum meshing force of parallel planetary gears
After the detailed grid data is predicted, if the output torque of P20 row is expressed as 1, then the
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Compact tensile test material of 42CrMo steel for low speed and heavy load gear
42CrMo steel is a kind of ultra-high strength steel, which has strong resistance to plastic deformation, less possibility of brittle
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Local eddy current and worst speed of low speed and heavy load gears
The existence of the worst speed in the boundary lubricated gears has not been discussed in the literature. There is
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Dynamic model of planetary gear transmission system with sun gear failure
1. Physical model Take 2K-H Planetary gear transmission system as the analysis object, as shown in Fig. 1 (a). The
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Wear law of low speed and heavy load gears
It is known from the test results that for the low-speed and heavy-duty lubricated gears with circumferential velocity v =
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Research on wear test method of low speed and heavy load gear
The tests were carried out on the modified CL-100 gear testing machine. The schematic diagram of the testing machine is
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Technological requirements for developing deep carburizing heavy duty gears
The carburizing layer of large low-speed and heavy-duty gears is deep, and the surface carbon concentration is low. The carburizing
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Transmission structure and noncircular gear design
The transmission ratio of non-circular gear can be changed according to the established motion law. Compared with the connecting rod,
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Mechanical performance test of engine starting motor drive gear
1. Hardness layer depth detection The results show that the surface hardness is 56-60hrc, the core hardness is 40-42hrc, and
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Carburizing and quenching process of low speed and heavy duty gear
1.Technical Requirements 20grni2moa steel material, module M = 6, number of teeth z = 38, width of teeth H =
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Load distribution coefficient model of involute spur gear at low speed
When involute spur gear works, it has to go through the process of single tooth meshing and double tooth meshing
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Response characteristics of gear meshing force under fatigue pitting
According to the advanced slicing function of gear modeling along the tooth width direction, the gear is sliced during gear
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Response characteristics of time varying meshing stiffness of gears
According to the motion relationship of gearbox transmission system and the advanced parameter modeling method of gear, bearing and other
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Characteristic response of fatigue pitting corrosion on tooth surface of gear transmission system
According to the above research on the time-varying meshing stiffness of gears with pitting features, the periodic stiffness curve with
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Damping ratio of fatigue non pitting characteristic response of gear transmission system
The displacement response of driving gear xp under different damping ratios (ζ = 0, 0.05, 0.10, 0.15) is plotted in
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System parameters of dynamic model of gear transmission
Taking the basic parameters of gear pair 1 as an example, it is difficult to use regular geometric algorithm to
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Study on Meshing Stiffness of Random Distribution Pitting of Gear Transmission System
Micro pitting can be regarded as the precursor of the occurrence of early pitting characteristics, and its geometric characteristics are
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Research on meshing stiffness of gear transmission system with randomly distributed pitting corrosion
According to the randomness of the pitting formation area, the pitting physical model under the random distribution shown in Figure
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Multi pitting corrosion model of gear transmission system along tooth width direction
For as shown in figure 1 (b) along tooth width direction more corrosion characteristics of the model, select the multipoint
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Multi-point erosion model of gear transmission system along tooth profile direction
For as shown in figure 1 (a) along the direction of the tooth profile of multipoint corrosion characteristic model, selecting
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Multi-point erosion model of gear transmission system
The multi-point erosion model can be mainly divided into the direction along the tooth profile and the direction along the
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Calculation and Discussion on meshing stiffness of gear transmission system with single pitting
According to the schematic diagram of pitting section in Figure 1, the section at the node is selected to study
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Single pitting model of gear transmission system
According to the characteristics of pitting metal shedding, the most intuitive performance after pitting is that the width of meshing
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Analysis of normal contact stiffness of gear transmission system
According to the measured data and theoretical calculation analysis of surface micro topography roughness of machining parts, the approximate relationship
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Normal load and normal contact stiffness model of gear transmission system with rough tooth surface
Let A1 be the contact area of the largest single asperity, and the contact of the tooth surface can be
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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