Gearbox fault diagnosis based on maximum kurtosis entropy deconvolution of lpso
As the most commonly used mechanical transmission components, gearbox faults are very common, including gear faults, bearing outer ring, inner […]
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Fault experiment of planetary gearbox based on 1.5-dimensional envelope spectrum
The experimental system consists of three-stage planetary gearbox, motor, brake and its switch, sensors (acceleration sensor, eddy current sensor, etc.)
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Gearbox Ferrography Wear Debris identification based on faster CNN
Gearbox has the advantages of compact structure and high transmission efficiency, which is the most widely used transmission component at
Scientific
Secondary frequency coupling proof of planetary gearbox
In the previous literature, 1.5-dimensional spectrum can be used to detect the secondary phase coupling, that is to say, frequency
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Planetary gearbox based on EEMD symmetric differential energy spectrum
Because the wind turbine often works in the harsh environment, the number of units is too much, so the fault
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Simulation modeling of mechanical gear forming based on DEFORM
According to the analysis of the forming process of the mechanical gear forging parts, there are two main forming processes
Scientific
Analysis and verification of planetary gearbox simulation signal
According to the different definitions, the 1.5-dimensional spectrum of the complex harmonic signal can detect the components involved in coupling
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Vehicle test verification of transmission gear based on optimal modification design
In order to further verify the effectiveness of this modification method, the optimized gear is assembled on the transmission for
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Orthogonal experimental design of three dimensional gear modification
Gear modification has great influence on the vibration and noise of gear and the load distribution on the tooth surface.
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Forming process analysis of mechanical gear based on DEFORM
There are some defects in the process of die forging, such as insufficient mold filling and cracks. In order to
Scientific
Definition of 1.5-dimensional spectrum of planetary gearbox
Because the Gaussian process of the third-order cumulant spectrum is zero, it is often used to analyze the non Gaussian
Scientific
Principle and method of gear profile modification of transmission
In order to reduce the vibration and noise of gear in the process of power transmission and reduce the impact
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Transmission gear model based on optimal modification design
Taking the gear transmission mechanism of a five speed transmission as the research object, the gear transmission mechanism model of
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Transmission gear performance optimization based on optimal modification design
Gear is the most common power transmission mechanism used in various types of transmission. It has the advantages of strong
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Gear forming calculation based on DEFORM
As an important transmission system of mechanical equipment, mechanical gear has the advantages of high transmission efficiency, high transmission precision,
Scientific
Strength and axial stiffness check of spiral bevel gear planetary gear box
The basic ideas of finite element analysis are summarized as follows 1) The continuous structure is discretized into a calculation
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Tractor gear transmission based on mathematical analysis
Although the conventional design can meet the requirements of transmission function, the design scheme is not the optimal design scheme
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Fault diagnosis of planetary gearbox based on elmd optimized by adaptive noise parameters
Due to the advantages of small volume, large transmission ratio, strong bearing capacity and high efficiency, planetary gearbox is widely
Scientific
Gearbox model test under fault condition
Five models are used to test the model fault on the validation data set. The validation data set has 5000
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Planetary gearbox based on 1.5-dimensional envelope spectrum
Because planetary gearbox has larger transmission ratio and higher load efficiency than traditional fixed shaft gearbox, it is widely used
Scientific
Strength check of spiral bevel gear planet carrier
In the process of planetary carrier transmission, the axis of planetary gear will be offset, and the load distribution in
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Fault diagnosis of wind turbine gearbox based on long term and short term memory network
Wind energy is a kind of clean and renewable energy, which develops rapidly in recent years, and the installed capacity
Scientific
Strength check of spiral bevel gear planetary reducer
The contact analysis of meshing gears of planetary gear train is carried out by using transient dynamic model. To simplify
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Structure and working principle of spiral bevel gear planetary reducer
The transmission scheme is determined according to the technical requirements for the reducer. The transmission schematic diagram and assembly drawing
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Residual life prediction of gear based on long term and short term memory network
Gear as the transmission device of mechanical equipment, its health has a great impact on the stability and life of
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Comparison of S-N curves between international standard ISO / TS 6336-2 and American Standard an-si / AGMA 2001-d04
Put the two standard S-N curves together, the abscissa is the number of stress cycles, the ordinate is the contact
Scientific
Traditional calculation and check of spiral bevel gear planetary reducer
The main failure modes of gear transmission are tooth surface pitting and tooth fracture. The working time of the reducer
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Key parts of spiral bevel gear planetary reducer
The rudder plays an important role in the control of flight direction and attitude. The reducer of steering gear mainly
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Selection of calculation coefficients of American Standard gears ANSI / AGMA 2001-d04 and ISO / TS 6336-2
In the calculation of the two standards, the calculation service factors of the two factors are involved. In the international
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Drawing of S-N curve of ISO 6336 standard gear contact strength
20mncr5 hardenability alloy steel, which is commonly used in Europe and China, is selected as the material for tractor gearbox
Scientific
Example of NC milling of non bevel gear
Using the above method to calculate the NC machining coordinate of spiral tooth non bevel gear, the gear pitch curve
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Standard S-N curve of tractor heavy duty gear contact strength based on American Standard ANSI / AGMA 2001-d04 and international standard ISO / TS 6336-2
In the gear standard design of American Standard ANSI / AGMA 2001-d04 and international standard ISO / TS 6336-2, the
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Machining principle of spiral bevel gear
The cutting of spiral bevel gear is carried out according to the principle of “imaginary flat top gear”. As shown
Scientific
Position of milling cutter head for non-circular spiral bevel gear
For the non-circular gear, assuming that the radius of the imaginary flat top gear is equal to the spherical radius
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Gearbox fault diagnosis based on multi-channel one-dimensional convolutional neural network feature learning
As the core component of mechanical transmission system, planetary gearbox is widely used in various mechanical equipment. Due to the
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Milling of non circular spiral bevel gear
Bevel gear is widely used in vehicle differential, machine tool transmission box and other transmission machinery. The non-circular bevel gear
Scientific
Coordinate transformation in NC machining of spiral bevel gear
Because the coordinate system of milling cutter head is not the coordinate system of CNC machine tool, but also requires
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Influence of eccentricity on gear machining control
In the process of gear machining, it is often affected by geometric eccentricity and motion eccentricity, and causes corresponding gear
Scientific
Imaginary flat top gear and gear blank corresponding arc length of single tooth
As shown in the figure, according to the geometric relationship, the turning angle of single tooth is cut according to
Scientific
VMD test verification of variable speed gearbox gear calculation
The mechanical fault comprehensive simulation test bench produced by a company is used to carry out the fault feature extraction
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Improving the traditional gear sharpening shaving cutter
Gear shaving cutter has a very important impact on the machining accuracy of gears. Therefore, the relevant technical operators need
Scientific
Spiral angle of spiral tooth non bevel gear
The inclination of spiral bevel gear teeth is measured by the helix angle β I. The longitudinal tooth profile of
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Optimization of machining accuracy of gear blank
The machining accuracy of gear blank is very important for the final gear machining accuracy improvement. Therefore, in order to
Scientific
NC milling method of non circular spiral bevel gear
For bevel gear, pitch curve is circular, and each tooth is the same. During machining, the starting position of the
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Variational problem of VMD construction in gear calculation of variable speed gearbox
The signal f is decomposed into k IMF components, each of which is a finite bandwidth with different center frequency.
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VMD order tracking technology for gear calculation of variable speed gearbox
In order to calculate the order tracking, a reference axis should be selected as the basis of calculation. The main
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Strictly control gear processing technology
For the improvement of gear machining accuracy, it is necessary to control and manage the related processes of gear machining
Scientific
Influence of tooth profile parameters of gear micropump on flow pulsation
For the involute gear, the tooth profile parameters are mainly the number of teeth Z, modulus, pressure angle α, modification
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Gear fault characteristics of variable speed gearbox based on VMD order tracking
Gearbox is the core component of transmission machinery. Due to its high working intensity and complex environment, faults often occur.
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Improve the quality of gear shaving
In the gear processing process line, the corresponding processing technology of different parts is not the same, which requires the
Scientific
Influence of trapped oil pressure on flow pulsation of gear micropump
The flow fluctuation quality is mainly reflected in the fluctuation coefficient. The smaller the fluctuation coefficient is, the better the
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Main influencing factors of gear machining accuracy
At present, gear processing technology has developed a perfect processing line, and the quality and output of gear processing has
Scientific
Unloading flow calculation of gear micropump affecting instantaneous flow
In one meshing cycle of [S1, S4], only the volume change rate DV of trapped oil compression in Fig. 1
Scientific
Instantaneous flow rate of gear micropump under trapped oil
The medium in the pump is non compressed. With the continuous rotation of the gear pair at the speed of
Scientific
Self reference adaptive noise elimination for gearbox bearings
Sanc obtains the reference signal by delaying the original signal, extracts the periodic signal component by autocorrelation analysis, and finally
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Fault diagnosis of gearbox bearing based on Sanc and one dimensional convolutional neural network
As the key component of power transmission of mechanical equipment, gearbox is widely used in wind power, automobile, aviation and
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Time varying meshing stiffness analysis finite element method and experimental method for cracked gears in service
Wu Jiateng et al. Proposed a new analytical finite element method to solve the time-varying meshing stiffness of tooth root
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Finite element method for time varying meshing stiffness of cracked gears in service
Sun Huagang and others used ANSYS finite element method to obtain the comprehensive meshing stiffness under different crack positions. The
Scientific
Theory and method of manufacturing design for non Hertz contact gear
By coupling the strength design of gear based on EHL central stress fitting formula and the gear lubrication design based
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Analytical method for time varying meshing stiffness of cracked gears in service
The crack of gear directly affects the time-varying meshing stiffness, and then affects the vibration response characteristics and dynamic characteristics