Case analysis of gear fault based on morphological wavelet and fuzzy entropy
In order to verify the superiority of fuzzy entropy in the fault classification of transmission gears, based on the gear […]
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A method for measuring axial parallelism of gear pair in gearbox
Gear transmission is a device that transmits motion and power by gear pair. It is the most widely used mechanical
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Application of fuzzy entropy in gear fault classification
Suppose that the original time series of gear fault signal is: [x (n)] = x (1), X (2) Then the
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Gear fault classification based on morphological wavelet and fuzzy entropy
When the transmission gear has cracks, broken teeth and other faults, it will produce impact characteristics. Because of the impact
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Application of morphological wavelet in gear fault classification
Morphological wavelet is a non-linear extension of traditional linear wavelet based on mathematical morphology. Mathematical morphology and its related operators
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Application of morphological wavelet and fuzzy entropy in gear fault classification
As one of the key assemblies of armored vehicle transmission system, the gear failure of transmission often leads to the
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Stress intensity factor of helical gear root crack and influence of J-integral simulation position
Three dimensional crack models at different positions are established on the helical gear, and the stress intensity factor and J-integral
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Evolution process and dynamic response analysis of gear fatigue pitting
Through the gear contact fatigue test-bed, the evolution process of gear fatigue pitting phenomenon and the vibration response characteristics of
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Stress intensity factor and J-integral of helical gear crack
The finite element software is used to simulate the helical gear with three-dimensional cracks, and the values of stress intensity
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Stress intensity factor of helical gear root crack and influence of J-integral simulation length
In order to study the effect of crack length on stress intensity factor and J-integral, the above semi elliptical initial
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Stress intensity factor of helical gear root crack and influence of J-integral simulation load
After the three-dimensional model of the gear is established, the material used in gear simulation is 17CrNiMo6, and then the
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Contact stress response characteristics of gear under fatigue pitting
As shown in the figure, the maximum contact stress response curves of the tooth surface without pitting and with pitting
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Application of high efficiency cutting tool in engineering gear machining
Using coating technology In the process of construction machinery gear processing, coating technology has a very important application, and 70%
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The helical gear model with initial crack is established
In order to analyze the three-dimensional crack model of helical gear root, a pair of three-dimensional helical gear models need
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Experimental study on fatigue pitting corrosion of spur gears
Through the gear contact fatigue test-bed, the evolution process of gear fatigue pitting phenomenon and the vibration response characteristics of
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Dynamic transmission error (DTE) response characteristics of gears with fatigue pitting
As shown in the figure, the DTE response curves without pitting and with pitting are drawn. Due to the periodic
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Application of high efficiency cutting in gear grinding engineering
In the process of gear processing of construction machinery, another important link is gear grinding. In the process of gear
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Prediction of crack stress intensity and fatigue life of helical gears
According to the measured value of stress intensity factor, kmax and Kmin can be obtained, and the range of stress
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Characteristics of pitting corrosion model of gear tooth surface
The tooth surface pitting model can be established through the gear modification parameter module in Fig. 1. By defining the
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Application of high efficiency CNC hobbing machine in gear processing of construction machinery
In the process of efficient cutting engineering gear processing, an important solution to solve the low efficiency of automatic production
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Stress intensity factor method for helical gear crack
If the stress state of the crack and the displacement direction of the crack surface are taken as the classification
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Application of high efficiency cutting in gear machining
The concept of efficient machining has been widely used in China’s current automotive industry. However, in the aspect of engineering
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Example analysis of contact line of cylindrical gear
In order to explain the influence of different deviation values on the contact line error and tooth profile of cylindrical
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Influence of grinding wheel position deviation on profile of cylindrical gear
Gear mechanism is one of the most widely used transmission mechanism and speed change mechanism in mechanical industry. With the
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Error analysis of contact line of cylindrical gear
In the transmission process, the contact area on the traditional gear tooth surface is a space surface, and the accuracy
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Analysis of machining problems of mechanical gear at present
1.Wrong number of gears The number of gears on the outer edge of the gear is called the number of
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Analysis of relative position deviation between grinding wheel and cylindrical gear
In the process of cylindrical gear form grinding, the tooth surface equation of the machined cylindrical gear can be determined
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Analysis of high precision gear processing technology
The overall structure of gear is mainly composed of tooth surface, tooth circle and tooth. According to different parameters and
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Influence of profile design of axial section of forming wheel on profile of cylindrical gear
The machining coordinate system of cylindrical gear grinding with form grinding wheel is established, as shown in Figure 1. In
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Machining technology of high precision mechanical gear
1.Involute machining technology Involute gear manufacturing is a common manufacturing method for high-precision gear processing in China. Therefore, the relevant
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Calculation of tooth surface equation of cylindrical gear
In the process of transmission, the contact line of the line gear is formed by the motion track of the
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Finite element analysis of gear shaft in feed box of lathe
In the machining process, each axis of C6136A lathe in the working process, due to the different stress conditions, the
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Types of rack and pinion pneumatic actuators for ball valves
Rack and pinion actuator is the most commonly used pneumatic actuator. The middle of the cylinder is connected with the
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Non pitting characteristic response speed of gear transmission dynamic system simulation
When the input speed frequency is 10Hz, the displacement response of master-slave gear XP is selected as the analysis object.
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Strategy of effectively controlling noise of internal gear pump
(1) Control of noise caused by flow pulsation. Through the above analysis of the causes of noise, we can see
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Preprocessing of finite element analysis for gear shaft of feed box of C6136A lathe
From the point of view of simplification, because the gear shaft of C6136A lathe feed box is a stepped shaft,
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Dynamic model of 6-DOF gear
Based on the introduction of the corresponding mathematical model and application scenarios proposed for the dynamic physical model of gear
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Cause analysis of noise in internal gear pump
(1) Pump flow pulsation causes noise. In the process of operation, the pump is faced with the noise problem caused
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Dimensional normal load and dimensional normal contact stiffness model of gear transmission system with rough tooth surface
In order to reduce the input of parameters in numerical simulation, the mathematical model of dimensional normal load is obtained
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Establishment of force model for gear shaft of feed box of C6136A lathe
Before determining the speed of the gear shaft of the feed box, the speed of the main shaft must be
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Working principle of internal gear pump
With the rapid development of industrial society, the application scope of internal gear pump is more and more wide, and
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Structure of small gear and big gear ring of high temperature resistant blind valve
The loosening of the valve clamping part adopts the gear ring transmission mode. The gear ring transmission ratio is constant,
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Calculation results of wheel side meshing gear
40CrMnMo is selected as the solar gear and planetary gear. The material is assumed to be isotropic. Next, constraints are
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Finite element analysis of meshing gear of a wheel side gear reducer
For heavy trucks, mining vehicles and off-road vehicles, large transmission ratio is needed, so wheel reducers are needed as the
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Establishment of geometric model of wheel side meshing gear
Firstly, the 3D complex model (such as chamfering and other details) is simplified in order to reduce the difficulty of
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Influence of hub deformation on engagement scheme of star gear reducer
In the case of reducing the hole diameter properly, modifying the size of a hole alone can not completely eliminate
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Force analysis of meshing gear of wheel side gear reducer
For each part of the design requirements should meet the size of the installation, power standards, long life and so
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Influence of hub deformation on meshing finite element calculation results of star gear reducer
The results of finite element analysis show that: When the rotation angle of the input end is between 0.64 rad
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Influence of hub deformation on meshing finite element model of star gear reducer
According to the real structure and the above model simplification method, the author establishes the three-dimensional solid models of internal
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Effect of hub deformation on meshing model simplification of star gear reducer
In fact, there are many parts in the transmission gear train of planetary gear output type planetary gear reducer, the
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Influence of hub deformation on meshing simulation model of star gear reducer
The planetary gear hub of planetary gear output type planetary gear transmission system consists of six circumferential uniformly distributed transmission
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Brief introduction of planetary gear reducer with planetary gear output
For planetary gear output type planetary gear reducer, during its operation, the planetary gear not only makes translation around the
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Bifurcation characteristics of a two stage planetary gear system with varying backlash
Due to the manufacturing accuracy, installation error, lubrication requirement and space reserved for the thermal expansion of gear teeth, the
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Influence of hub deformation on meshing characteristics of star gear reducer
Star gear transmission is a kind of transmission system with few internal teeth difference and internal translation. Compared with other
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Lyapunov exponent of nonlinear system of two stage planetary gear system
Lyapunov exponent represents the average exponential divergence rate of the distance between two adjacent trajectories in the phase plane with
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Nonlinear dynamic system excitation of two stage planetary gear system
1.Time varying meshing stiffness When the gear is in transmission, the meshing tooth pair alternates between 1 and 2, the
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Study on nonlinear dynamic characteristics of two stage planetary gear train
The lumped parameter method is used to establish the “translation torsion” coupling dynamic model of the two-stage speed increasing planetary
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Nonlinear dynamic model of two stage planetary gear system
The research object of the model is a two-stage planetary gear system, and the system diagram is shown in Figure
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Nonlinear dynamic characteristics of two stage planetary gear train
Compared with single-stage transmission, multi-stage planetary gear transmission has higher efficiency, but its structure is more complex. Multi stage planetary
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Modal analysis of gear transmission shaft considering forced vibration
The modal module is used to simulate and test the transmission shaft structure. As shown in the figure, when using