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 […]
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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
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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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Oil trapping and meshing process of gear micropump
The trapping process and meshing process of the gear micropump are completely consistent with those of the commonly used gear
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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Measurement of noncircular gear articulated arm scanner
The measurement of non-circular gear with joint wall scanner is to obtain the three-dimensional point cloud model of non-circular gear
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Optimization objective function of single stage double circular arc spiral bevel gear
The single-stage nutation reducer is designed with the radial size less than 108 mm, the transmission power of 20 kW
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Noncircular gear CMM measurement
Noncircular gear will produce machining error in the process of machining. The size of machining error reflects the level of
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Nutation transmission principle of single stage double circular arc spiral bevel gear
The wobble of a coin on the table before it stops is nutation. A nutation transmission mechanism is formed by
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Basic parameters of noncircular gear under test
Noncircular gear can be considered as a deformation of circular gear, that is, its rolling pitch circle has changed into
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Dynamic characteristics of ship helical gear after modification
Figure 1 and Figure 2 show the frequency domain diagram of angular acceleration of driven wheel after modification. It can
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Error measurement method of noncircular gear
A lot of research has been done on the measurement of cylindrical gear and non-circular gear at home and abroad,
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Nonlinear dynamic model of Marine Helical Gear Considering backlash
Helical gears are meshed at the same time in the process of meshing. When studying the dynamic problem of gear
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Calculation results and analysis of helical gear
Transmission error is an important index of gear transmission performance. Transmission error refers to the difference between the actual position
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Case test of non Hertz contact gear design theory
The results show that the EHL center stress design results are very close to those based on Hertz theory, which
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Case test of non Hertz contact gear design
The dividing circle diameter of driving wheel of locomotive traction gear is 324 mm, transmission ratio μ = 2.59, tooth
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Mechanism of tooth surface distortion in machining helical gear with profile modification
Worm machining helical gear is mainly realized by changing the center distance between cutter and gear along the tooth width
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Production example test of non Hertz contact gear
In the general concept of engineers, the gear design method based on Hertz contact theory widely used in current engineering
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Improvement of tooth surface distortion in machining helical gear with profile modification
As shown in Fig. 1, the tooth surface of the modified helical gear obtained by changing the center distance is
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Definition of twist coefficient of tooth surface in machining helical gear with profile modification
The phenomenon of tooth surface twist refers to the torsion of tooth surface along the direction of tooth width. As
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Papers on non Hertz contact gear design
There are a lot of literatures about EHL Analysis of gear transmission, but the research on the combination of EHL
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Design method of non Hertz contact gear
Based on the EHL theory, a new gear design theory and method non Hertz contact gear design theory and method
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Derivation of tooth surface equation of helical gear with profile modification
Worm or hob machining helical gear coordinate system is shown in the figure, S1 is worm or hob coordinate system,
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Non Hertz contact gear design theory
Gear is an important industrial basic component and the core component of mechanical equipment. Its performance and reliability determine the
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Case analysis of nonlinear vibration reliability of gear mechanism
The rationality of the proposed method is verified by the nonlinear vibration reliability analysis of a pair of standard spur
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Experimental verification of end face spiral gear
In order to verify the correctness of digital closed-loop manufacturing technology for end face spiral bevel gear coupling, grinding experiments
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Multi pass Monte Carlo simulation method for reliability analysis of gear nonlinear vibration
In practical engineering, the stochastic response of gear nonlinear vibration is difficult to be characterized by Gaussian random process or
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Construction of digital closed loop manufacturing system for end face spiral gear
The digital closed-loop manufacturing technology of end face spiral gear coupling is to organically combine the numerical control processing technology
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Construction of mathematical model of multi-stage gear transmission system
According to the stiffness characteristics, there is a certain difference between the multi-stage gear transmission and the general gear transmission.
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Stochastic process method for reliability analysis of gear nonlinear vibration
Under the influence of random factors, all kinds of nonlinear vibration responses of gears can be regarded as random processes.
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Digital closed loop manufacturing technology of end face spiral gear coupling
The digital closed-loop manufacturing technology of end face spiral gear coupling is studied (1) The mathematical model of tooth surface
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Nonlinear vibration model of gear transmission
The lumped mass method is used to establish the nonlinear vibration model of single degree of freedom gear transmission as
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Digital closed loop manufacturing of end face spiral bevel gear coupling
The end face spiral gear coupling (also known as circular arc end gear) was invented by Gleason company. Relying on
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Optimal design of gear multistage transmission system
Optimize design variables The multi-stage gear reducer has the characteristics of complex structure. Considering the installation environment and conditions of
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Optimal solution of single stage double circular arc spiral bevel gear
The optimal design mathematical model of single-stage bevel gear nutation reducer is as follows Where 1 ≤ J ≤ 12.
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Analysis of nonlinear vibration characteristics of gear transmission system
The integral time range of solving differential equations is 300tm. In order to solve this problem, it is necessary to
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Single stage nutation reducer with double circular arc spiral bevel gear
According to the principle of nutation, various nutation mechanisms have been designed and studied from the aspects of structure analysis,