Dynamic characteristics of gear transmission system under fatigue pitting of tooth surface
The five development concepts of innovation, coordination, green, open and sharing are put forward, green production and green transformation are […]
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
American Standard ANSI / agma2001 is adopted to calculate the required contact strength, and the calculation formula is as follows:
In the design of American standard gears, steel, Grade2, hrc58-64 (AGMA), case carbonized steel and case hardened gear materials similar
1.Calculate the S-N curve of gear The required contact strength is calculated according to ISO / TS 6336-2. Since it
Structural optimization is the application of optimization algorithm in mechanical design. According to different optimization variables and levels, it can
Bearing reaction force, meshing load of fixed shaft gear, driving torque of cutting motor and cutting roller load are considered
The bending fatigue life of tractor gear is closely related to the selection of gear modulus, which can be selected
According to the characteristics of objective function and planetary gear design, constraints can be divided into flexible constraints and rigid
The motor rotor and the gear shaft 1, the gear shaft 8 and the sun gear of the first stage
The input of multi-channel signal can collect fault feature information more comprehensively, and CNN has achieved great success in the
According to the large power of tractor transmission system, higher requirements are put forward for the strength and service life
Take the detection of high-speed shaft gear as an example. The sensor data of high-speed shaft bearing position is taken
In order to further illustrate the superiority of this method, the order spectrum obtained by EMD and itd is compared
It is tested and verified on a 1.5 MW wind turbine in a wind farm. The gearbox of the fan
When the gear and the shaft are connected by spline, or the analysis object is the gear shaft, it can
Through the method proposed in this paper, the feature extraction of gear uniform wear fault is carried out, and the
Topology optimization is a kind of conceptual design. The optimization results are shown in the figure, which can not be
For variable speed rotating machinery such as fan, in the process of operation, various signals reflecting its operation information are
Firstly, the vibration signal is resampled in the angular domain, and the input shaft speed curve (as shown in Figure
Three dimensional topological modification is an effective means to improve the transmission quality of gear system, which includes two directions
The ultimate goal of dynamic analysis is to design object products with high dynamic performance. The coupling dynamic model of
The generalized displacements of substructure dynamic equations are numbered in local coordinates, and the generalized displacements of each substructure will
The data compression algorithm based on the gearbox configuration is based on the physical structure of the gearbox and the
By introducing the quadratic penalty factor α and Lagrange operator λ (T), the constrained variational problem is transformed into the
The improved data preprocessing process is a method to extract effective data by combining gearbox configuration with real-time data acquisition
VMD is an adaptive signal analysis method, which can find the optimal solution of the variational model through multiple iterations,
Under the influence of the elastic deformation of the supporting system, the axes of the parallel gears are skewed in
According to the different coordination relationship of the interface of each substructure, the connection types between the corresponding nodes can
Med is to eliminate the influence of transmission path by optimizing the filter. xn(n = 1,2,… , n) is the
A centralized and unified monitoring center is proposed to complete the functions of real-time data acquisition and remote centralized control.
As shown in the figure, it is known that the input power P1 of the high-speed stage of the two-stage
Condition monitoring of wind turbine can understand the health status of wind turbine in real time and reduce the maintenance
The cutting part is divided into rocker box, fixed shaft gear, gear shaft, cutting drum, planetary gear train and cutting
The hardware order tracking needs professional Keyphasor device, which has high cost, complex installation and large application scope; the order
As shown in the figure, it is known that the input power P1 of the high-speed stage of the two-stage
The dynamic modeling method of multi-stage gear system under the condition of large deformation is studied. Taking the cutting part
① According to the contact fatigue strength formula of tooth surface, the The constraint conditions of tooth surface are obtained
In order to make up for the disadvantage that ICA can only be applied to the blind source separation problem
Dynamic substructure method is an effective method to analyze complex mechanical systems and structural systems. Although some scholars have used
The transmission diagram of the reducer is shown in the figure, and the optimization design is carried out according to
In mechanical transmission equipment, gearbox plays an extremely important role, it is widely used in all walks of life. It
Given the transmission power P, transmission ratio I and output speed n of the reducer, a set of technical parameters
The load stroke curves of the two processes are shown in the figure. It can be seen from the figure
The test set data is input into LSTM model to verify the effectiveness of model early warning. The prediction results
The traditional and improved processes are used for experimental study. The typical deformation conditions of the blank during the deformation
Randomly select 25% of the training set data as the verification set, set the model loss value as Mae, and
In this paper, the first mock exam of the internal gear of a solid cylinder with no hub hub and
The traditional closed die forging of internal gear is shown in figure (a). In the process of pressing the blank
The LSTM model is trained by selecting the normal operation data of the unit. When the gearbox bearing is in
With reliable transmission quality and efficiency, gears are widely used in mechanical field, especially in military industry, aerospace and other
A new kurtosis spectral entropy index is proposed, which consists of kurtosis value and envelope spectral entropy. When there are
Particle swarm optimization algorithm has good global optimization ability. Suppose there are m particles in the d-dimensional space, which form
The figure is the confusion matrix corresponding to the method in this paper, through which the identification of each type
Under the elastic-plastic condition, the J-integral of helical gear crack describes the stress and stress field at the crack front
Gear is of great significance to all kinds of mechanical equipment. Its performance may directly affect the service life and
In order to verify the advantages and effectiveness of intelligent fault diagnosis of gearbox bearing based on Sanc and 1d-cnn,
According to the working principle of Sanc, the separation effect of adaptive filter mainly depends on the selection of delay
The parameters of neural network mainly include: learning rate, cost function, activation function, number of learning rounds, batch size, network
After the candidate region is generated, the ROI pooling layer is used to further extract the features of the candidate