Figure 1 shows the profile deviation measurement curve of aa-1 gear working tooth surface (left tooth surface) after running for […]
Taking the basic parameters of gear pair 1 as an example, it is difficult to use regular geometric algorithm to
Micro pitting can be regarded as the precursor of the occurrence of early pitting characteristics, and its geometric characteristics are
Figure 1 shows the profile deviation measurement curve of aa-1 gear working tooth surface (left tooth surface) after running for
According to the randomness of the pitting formation area, the pitting physical model under the random distribution shown in Figure
First of all, the professional D80 gear measuring and Testing Center (Figure 1) is used to measure the accuracy of
For as shown in figure 1 (b) along tooth width direction more corrosion characteristics of the model, select the multipoint
The main data acquisition method of cylindrical gear fatigue test-bed is to collect and record the data through the real-time
It is a very complicated and random process that gear evolves from the healthy state of tooth surface to fatigue
For as shown in figure 1 (a) along the direction of the tooth profile of multipoint corrosion characteristic model, selecting
The multi-point erosion model can be mainly divided into the direction along the tooth profile and the direction along the
Based on the theory of rigid body dynamics, the rigid body analysis model of pitting dynamics of gear system is
According to the schematic diagram of pitting section in Figure 1, the section at the node is selected to study
Gear is the key part of gearbox system, so it is very important to establish the coupling force element between
According to the characteristics of pitting metal shedding, the most intuitive performance after pitting is that the width of meshing
According to the rigid body multi-body dynamic motion analysis theory and modeling ideas, the single-stage gearbox can be dissected and
According to the measured data and theoretical calculation analysis of surface micro topography roughness of machining parts, the approximate relationship
A simplified six degree of freedom dynamic mathematical model of gear system is established to study the dynamic response characteristics
Let A1 be the contact area of the largest single asperity, and the contact of the tooth surface can be
In order to verify the simulation model, the minimum oil film thickness is far less than the root mean square
By referring to the physical causes of fatigue pitting on tooth surface and the characteristics of pitting pits, different mesh
1.Fracture morphology analysis 1.1 macroscopic observation of fracture The three teeth of the driving gear of the starting motor are
The basic parameters of gear pair 2 are selected to calculate and analyze the time-varying meshing stiffness with friction effect.
According to the causes of pitting, pitting is a phenomenon of surface metal falling off under the action of cyclic
By introducing the effect of interface characteristics (such as friction, rough surface, etc.) between gears, the comprehensive time-varying stiffness of
The quasi-static calculation method is adopted in the finite element simulation calculation, that is, the stiffness under the load at
In the meshing process of gear pair, the relative sliding and rolling occurs between the meshing tooth surfaces, which causes
Adhesive wear is the most common fault type on the working surface of mechanical system, which often occurs on the
Gear deformation is affected by many factors. In order to effectively avoid tooth shape deformation during heat treatment and reduce
According to the two models of contact stiffness calculation, the following are calculated and discussed respectively. Firstly, according to the
Based on the theory of gear kinematics and energy method, a high-precision modeling method for calculating the time-varying meshing stiffness
Combined with the research results of earlier scholars at home and abroad, and aiming at the relevant research points and
The measurement can be divided into two cases: the measurement of the profile error of the end face on the
As one of the important components of gear stiffness, it is very important to calculate the matrix stiffness reasonably and
The enveloping hourglass worm with variable tooth thickness involute gear is a new type of worm. At present, there is
The vibration signal of gearbox can directly reflect its operation status, so the gearbox fault diagnosis based on vibration signal
According to the semi empirical formula model, the contact stiffness is related to the contact load. According to the description
Based on the above measurement principle, the milling involute enveloping hourglass worm sample shown in Figure 1 is tested in
Liang et al. established three preset models for pitting at different point erosion degrees: mild pitting, moderate pitting and severe
The accurate three-dimensional model of variable tooth thickness involute gear enveloping hourglass worm is established. In the five axis linkage
The test method usually adopts quasi-static analysis conditions, which can accurately calculate the TVMs of gear meshing pair. In practical
Gear pair 2 is selected to study and analyze the effect of gear geometric parameters on tooth stiffness. The curve
In variable tooth thickness involute gear enveloping hourglass worm gearing, the worm gear is variable tooth thickness involute gear with
Finite element method (fem) is to the gear body and tooth discrete into tiny unit elastic body, and through the
The gear pair parameters are selected for tooth stiffness simulation analysis. The selected gear pair parameters cover two different tooth
In order to further calculate the meshing interval expression of gear in a single period from meshing in to meshing
He et al. extended the two-stage gear reducer dynamics model on the single-stage gear dynamics model, and studied the influence
According to the spatial meshing principle of involute spur gear, when a pair of standard involute tooth profiles are meshed,
Zhou jian magnitude to a gear mesh type bending – twist mechanical model considering the meshing stiffness and error of
According to the theory of mechanics of materials and elasticity, a beam/bar with equal section length of Z is taken
For gear transmission system dynamics by physical model to the transformation of the mathematical model, and to establish the mathematical
The low-speed and heavy-duty gear assembly established by SolidWorks is exported to. Step format and imported into ANSYS Workbench. The
A series of research work has been carried out on the dynamic modeling analysis and dynamic performance optimization of multi-stage
When the cyclic contact stress on the tooth surface exceeds the fatigue limit of the material, a micro crack appears
The accurate modeling of gear is an important basis for analyzing the contact stress and crack propagation law of gear.
① Aiming at the problems of modeling difficulty and low computational efficiency of multi-stage gear system dynamics, an efficient general
Reducing the fluctuation of static transmission error is a well-known tooth profile modification criterion, but in practice, there are not
In the dynamic analysis of gear, the modeling process is very important. With the development of science and technology, there
The research content of gear crack and the research status of gear stress intensity factor at home and abroad are
With the continuous increase of mining depth, the geological characteristics of high ground stress and strong mining disturbance in deep
