Deep carburizing of heavy duty gears
Although the deep carburizing of large heavy duty gears improves the bearing capacity and prolongs the service life, it still […]
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Research on wear of low speed and heavy load gears
Tooth wear is one of the main failure forms of low speed and heavy load gear transmission. H. Winter has
Scientific
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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Standards and technical requirements for developing deep carburized heavy duty gears
The important parameters to ensure the load-bearing capacity of low-speed and heavy-duty hard face gear are: enough central strength and
Scientific
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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Equipment requirements for developing deep carburizing large heavy duty gear
The deep carburizing of large heavy duty gears has a history of more than 10 years in foreign countries, with
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Fault diagnosis model of shearer rocker gear based on RESNET
1. Selection of residual unit module In RESNET, there are two kinds of residual unit modules: original residual unit module
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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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Reasonable selection of hardening heat treatment method for low speed and heavy load gears
It is very important to choose the hardening heat treatment method of low speed and heavy load gear reasonably. The
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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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Tooth surface plastic deformation of low speed and heavy load gear with soft tooth surface
The main damage form of gear in soft tooth surface rolling mill is severe plastic deformation of gear surface, which
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Ways to improve the bearing capacity of low speed and heavy load gear with soft tooth surface
Using normalizing big gear and quenching and tempering small gear, the tooth surface after use can be extruded into mirror
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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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Eliminating early fatigue pitting of low speed and heavy load gear with soft tooth surface
As the cement mill, mine hoist and other soft tooth surface reducer gear, the main problem is to eliminate early
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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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Improving the bearing capacity of low speed and heavy load gear with soft tooth surface
When gears work, they bear two kinds of stress, so there are few two kinds of failure. One is that
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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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Simulation design of tractor gear based on ADAMS
The modeling of Pro / E software is based on the characteristics of 3D model, and it can also carry
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Carburizing and quenching process of low speed and heavy duty gear
There are three ways to improve the bearing capacity of gears, namely, ① improving the structure of reducer, such as
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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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Study on dynamic characteristics of gear fatigue pitting
From the engineering point of view, through the establishment of mathematical models and contact fatigue test platform under different physical
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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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Gear system model and dynamic response analysis under pitting corrosion
By establishing a simplified six degree of freedom dynamic mathematical model of gear system and a rigid body dynamic analysis
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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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Analysis on crack propagation of internal meshing modified gear
According to the calculated stress intensity factors, the results of stress intensity factor analysis show that ki is the largest,
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Application of improved entropy feature in planetary gear crack fault identification
Due to the bad working environment of a tank planetary gearbox, the gear is prone to crack and other faults.
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Derivation and application of gear meshing stiffness model under pitting characteristics
The shape of pitting pits on tooth surface is simulated quickly and approximately by using rectangular geometry. The mathematical models
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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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Research and application of time varying meshing stiffness of gear under macro / micro interface characteristics
Considering the macro interface friction coefficient, the load component equation along the tooth profile direction is derived, and the mathematical
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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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Derivation and application of refined gear time varying meshing stiffness model
“Innovation, coordination, green, open and sharing” are the five core supporting development concepts to promote the green transformation of traditional
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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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Comparison and summary of fatigue pitting test results of spur gears
In order to better reflect the effect of the test gear on the dynamic response characteristics of the system due
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Fatigue pitting characteristics of spur gear in fatigue pitting test
Figure 1 shows the measurement curve of tooth profile deviation of aa-1 gear after fatigue pitting. The measurement results show
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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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Measurement data and response characteristics of fatigue pitting corrosion test for 8 million cycles spur gear
Figure 1 shows the measurement curve of tooth profile deviation of aa-1 gear after 8 million times of operation. The
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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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Measurement data and response characteristics of fatigue pitting corrosion test for spur gears with six million cycles
Figure 1 shows the profile deviation measurement curve of aa-1 gear working tooth surface (left tooth surface) after running for
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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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Measurement data and response characteristics of fatigue pitting corrosion test for spur gears with 4 million cycles
Figure 1 shows the profile deviation measurement curve of aa-1 gear working tooth surface (left tooth surface) after running for
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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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Results of original measurement data in fatigue pitting test of spur gear
First of all, the professional D80 gear measuring and Testing Center (Figure 1) is used to measure the accuracy of
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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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Data acquisition and measurement method for fatigue pitting test of spur gear
The main data acquisition method of cylindrical gear fatigue test-bed is to collect and record the data through the real-time
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Summary of fatigue pitting test bench for spur gears
It is a very complicated and random process that gear evolves from the healthy state of tooth surface to fatigue
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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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Research on dynamic response of gear system pitting based on rigid body dynamics
Based on the theory of rigid body dynamics, the rigid body analysis model of pitting dynamics of gear system is
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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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Gear model and coupling force element characteristics
Gear is the key part of gearbox system, so it is very important to establish the coupling force element between
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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