1. Simulation of gear shaping In order to verify the correctness of non-circular gear profile, matlab programming is used to […]
The traditional concept is that flying vehicle is a land and air amphibious vehicle with the functions of flying in
According to the above research on the time-varying meshing stiffness of gears with pitting features, the periodic stiffness curve with
The displacement response of driving gear xp under different damping ratios (ζ = 0, 0.05, 0.10, 0.15) is plotted in
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
According to the randomness of the pitting formation area, the pitting physical model under the random distribution shown in Figure
For as shown in figure 1 (b) along tooth width direction more corrosion characteristics of the model, select the multipoint
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
According to the schematic diagram of pitting section in Figure 1, the section at the node is selected to study
According to the characteristics of pitting metal shedding, the most intuitive performance after pitting is that the width of meshing
According to the measured data and theoretical calculation analysis of surface micro topography roughness of machining parts, the approximate relationship
Let A1 be the contact area of the largest single asperity, and the contact of the tooth surface can be
The basic parameters of gear pair 2 are selected to calculate and analyze the time-varying meshing stiffness with friction effect.
By introducing the effect of interface characteristics (such as friction, rough surface, etc.) between gears, the comprehensive time-varying stiffness of
Combined with the research results of earlier scholars at home and abroad, and aiming at the relevant research points and
Liang et al. established three preset models for pitting at different point erosion degrees: mild pitting, moderate pitting and severe
He et al. extended the two-stage gear reducer dynamics model on the single-stage gear dynamics model, and studied the influence
For gear transmission system dynamics by physical model to the transformation of the mathematical model, and to establish the mathematical
A series of research work has been carried out on the dynamic modeling analysis and dynamic performance optimization of multi-stage
① Aiming at the problems of modeling difficulty and low computational efficiency of multi-stage gear system dynamics, an efficient general
Shearer cutting part is a rocker gear box. The rocker box is a hollow cantilever structure, the free end of
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
Coal is China’s basic energy and important chemical raw materials. Coal industry is an important basic industry related to national
The function of bevel gear is to transmit the motion and power between two intersecting axes. Similar to cylindrical gears,
Gear transmission is a device that transmits motion and power by gear pair. It is the most widely used mechanical
As shown in the figure, the DTE response curves without pitting and with pitting are drawn. Due to the periodic
When the input speed frequency is 10Hz, the displacement response of master-slave gear XP is selected as the analysis object.
In order to reduce the input of parameters in numerical simulation, the mathematical model of dimensional normal load is obtained
The modal module is used to simulate and test the transmission shaft structure. As shown in the figure, when using
The gear transmission structure composed of four stage reduction system is selected as the test object, and the gear transmission
At this stage, the research on gear transmission structure is mainly concentrated in the field of vehicle transmission, reducer and
In order to compare and display the data intuitively, the single logarithm coordinate drawing method is used to draw the
According to the two-dimensional contour curve (formula) of rough surface expressed by W-M function, the morphology characteristics of rough surface
The rough appearance of the tooth surface is random, and the geometric characteristics of the appearance are related to the
According to the actual meshing process of gear pair, the interface of a pair of gear pairs is filled with
Tooth profile modification is a common method to avoid the impact of gears in the process of meshing. It can
After the research model of transmission gear transmission mechanism is established, the software is used to set the operating conditions
With the “innovation, coordination, green, open, sharing” five development concepts and development needs, industrial equipment demand of high quality quantification,
According to Lagrange equation, the dynamic differential equation of planetary transmission system can be deduced as follows Among them, JS,
With the development of national industrial equipment and the urgent need for industrial products to be improved, the bearing capacity,
Figure (b) and (c) the torsional vibration dynamic model of elastic support model (figure) (a) effect can reflect more parameters,
With three degrees of freedom type torsional vibration model (FIG. (a)) as the carrier for the influence parameters calculation and
Based on the single degree of freedom torsion model, Zajkek et al. used parabolic functions to describe the engagement stiffness
Gear system dynamics is a complex multi-coupling dynamics system, which strictly follows the system input-carrier analysis-response output dynamic control response
The five development concepts of innovation, coordination, green, open and sharing are put forward, green production and green transformation are
In the process of tractor gear transmission, the transmission load is large, the running speed is low, and the transmission
Bearing reaction force, meshing load of fixed shaft gear, driving torque of cutting motor and cutting roller load are considered
When the gear and the shaft are connected by spline, or the analysis object is the gear shaft, it can
The dynamic modeling method of multi-stage gear system under the condition of large deformation is studied. Taking the cutting part
In the study of multi degree of freedom system, the influence of viscous damping should be considered. The differential equation
In the process of tractor gear transmission, the transmission load is large, the running speed is low, and the transmission
In order to reduce the vibration and noise of gear in the process of power transmission and reduce the impact
Taking the gear transmission mechanism of a five speed transmission as the research object, the gear transmission mechanism model of
Gear is the most common power transmission mechanism used in various types of transmission. It has the advantages of strong
Although the conventional design can meet the requirements of transmission function, the design scheme is not the optimal design scheme
The chemical composition of the gear was analyzed by carbon sulfur analyzer and optima800 plasma emission spectrum. The test results
According to the stiffness characteristics, there is a certain difference between the multi-stage gear transmission and the general gear transmission.
