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 […]
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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
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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.
Scientific
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
Scientific
Lubrication design of gear manufacturing based on D-H formula
Based on D-H formula, Dowson D and Higginson GR proposed the minimum oil film thickness formula of EHL in line
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Crack propagation path of Cracked Gear with time varying meshing stiffness during service
Gear cracks are mainly divided into root cracks and indexing circle cracks. In 2009, chaari et al. Proposed for the
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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
Scientific
Comparison of gear design results based on EHL central stress formula and Hertz stress formula
1 Influence of speed The main parameters are as follows: helix angle β = 8.11 °, η 0 = 0.15
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Time varying meshing stiffness of cracked gears in service
Gear transmission system, as a device for transmitting motion and power, has been widely used in various machines and mechanical
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Failure analysis on gear cracking of pitch reducer for wind power generation
Causes of gear cracking The pitch drive system is placed in a high altitude, and the planetary gear of pitch
Scientific
Comparison of EHL central stress fitting formula and Hertz formula in gear line contact
The following figure shows the comparison of EHL central stress and maximum Hertz stress calculated by fitting formula under different
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Metallographic examination of gear of pitch reducer for wind power generation
The chemical composition of the gear was analyzed by carbon sulfur analyzer and optima800 plasma emission spectrum. The test results
Scientific
EHL center stress formula of line contact and design of cylindrical gear based on EHL stress
1.EHL center stress formula of line contact The fitting formula of the central stress under EHL condition is proposed Where
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Gear cracking of pitch reducer for wind power generation
Pitch reducer is widely used in wind power generation system. Its working characteristics are frequent start and stop of intermittent
Scientific
Hertz formula and design formula of cylindrical gear based on Hertz stress
1 Hertz formula The formula of maximum Hertz contact stress is as follows: Where, σ h is the maximum Hertz
Scientific
Tooth profile error correction of end face spiral gear
In the actual machining of the end face spiral gear coupling, due to the influence of machine tool thermal deformation,
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Macro fracture inspection of gear of pitch reducer for wind power generation
After ultrasonic cleaning, the fracture surface of the fractured gear can clearly see the crack source area and the reverse
Scientific
Mathematical modeling of theoretical tooth surface of face spiral gear
The end face spiral gear coupling is composed of concave tooth part and convex tooth part. The concave tooth part
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Tooth profile deviation and tooth thickness deviation of noncircular gears
The number of teeth of circular gear is the total number of teeth on the whole circumference of circular gear,
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Pitch deviation of noncircular gear
On the pitch curve of non-circular gear, the arc length between two adjacent tooth profiles on the same side is
Scientific
Finite element analysis of single stage double circular arc spiral bevel gear
The 3D models of nutation inner and outer bevel gears are imported into the finite element analysis software and assembled.
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Measurement of noncircular gear with 3D scanner
Using 3D scanner to measure non-circular gear is to scan non-circular gear to obtain point cloud data model of non-circular
Scientific
Constraint function of single stage double circular arc spiral bevel gear
Fatigue strength constraint The nutation bevel gear adopts the basic tooth profile of GB / T 12759-1991 double circular arc