The experimental system consists of three-stage planetary gearbox, motor, brake and its switch, sensors (acceleration sensor, eddy current sensor, etc.) […]
In the previous literature, 1.5-dimensional spectrum can be used to detect the secondary phase coupling, that is to say, frequency
According to the different definitions, the 1.5-dimensional spectrum of the complex harmonic signal can detect the components involved in coupling
Because the Gaussian process of the third-order cumulant spectrum is zero, it is often used to analyze the non Gaussian
In order to reduce the vibration and noise of gear in the process of power transmission and reduce the impact
The basic ideas of finite element analysis are summarized as follows 1) The continuous structure is discretized into a calculation
Five models are used to test the model fault on the validation data set. The validation data set has 5000
In the process of planetary carrier transmission, the axis of planetary gear will be offset, and the load distribution in
The contact analysis of meshing gears of planetary gear train is carried out by using transient dynamic model. To simplify
The main failure modes of gear transmission are tooth surface pitting and tooth fracture. The working time of the reducer
Using the above method to calculate the NC machining coordinate of spiral tooth non bevel gear, the gear pitch curve
For the non-circular gear, assuming that the radius of the imaginary flat top gear is equal to the spherical radius
Because the coordinate system of milling cutter head is not the coordinate system of CNC machine tool, but also requires
As shown in the figure, according to the geometric relationship, the turning angle of single tooth is cut according to
The mechanical fault comprehensive simulation test bench produced by a company is used to carry out the fault feature extraction
The inclination of spiral bevel gear teeth is measured by the helix angle β I. The longitudinal tooth profile of
For bevel gear, pitch curve is circular, and each tooth is the same. During machining, the starting position of the
In order to calculate the order tracking, a reference axis should be selected as the basis of calculation. The main
For the involute gear, the tooth profile parameters are mainly the number of teeth Z, modulus, pressure angle α, modification
The flow fluctuation quality is mainly reflected in the fluctuation coefficient. The smaller the fluctuation coefficient is, the better the
In one meshing cycle of [S1, S4], only the volume change rate DV of trapped oil compression in Fig. 1
The medium in the pump is non compressed. With the continuous rotation of the gear pair at the speed of
Sanc obtains the reference signal by delaying the original signal, extracts the periodic signal component by autocorrelation analysis, and finally
The trapping process and meshing process of the gear micropump are completely consistent with those of the commonly used gear
By coupling the strength design of gear based on EHL central stress fitting formula and the gear lubrication design based
Based on D-H formula, Dowson D and Higginson GR proposed the minimum oil film thickness formula of EHL in line
1 Influence of speed The main parameters are as follows: helix angle β = 8.11 °, η 0 = 0.15
The following figure shows the comparison of EHL central stress and maximum Hertz stress calculated by fitting formula under different
1.EHL center stress formula of line contact The fitting formula of the central stress under EHL condition is proposed Where
1 Hertz formula The formula of maximum Hertz contact stress is as follows: Where, σ h is the maximum Hertz
In the actual machining of the end face spiral gear coupling, due to the influence of machine tool thermal deformation,
The end face spiral gear coupling is composed of concave tooth part and convex tooth part. The concave tooth part
The 3D models of nutation inner and outer bevel gears are imported into the finite element analysis software and assembled.
Fatigue strength constraint The nutation bevel gear adopts the basic tooth profile of GB / T 12759-1991 double circular arc
The single-stage nutation reducer is designed with the radial size less than 108 mm, the transmission power of 20 kW
The wobble of a coin on the table before it stops is nutation. A nutation transmission mechanism is formed by
Figure 1 and Figure 2 show the frequency domain diagram of angular acceleration of driven wheel after modification. It can
Helical gears are meshed at the same time in the process of meshing. When studying the dynamic problem of gear
Transmission error is an important index of gear transmission performance. Transmission error refers to the difference between the actual position
Worm machining helical gear is mainly realized by changing the center distance between cutter and gear along the tooth width
As shown in Fig. 1, the tooth surface of the modified helical gear obtained by changing the center distance is
The phenomenon of tooth surface twist refers to the torsion of tooth surface along the direction of tooth width. As
Worm or hob machining helical gear coordinate system is shown in the figure, S1 is worm or hob coordinate system,
The rationality of the proposed method is verified by the nonlinear vibration reliability analysis of a pair of standard spur
In practical engineering, the stochastic response of gear nonlinear vibration is difficult to be characterized by Gaussian random process or
According to the stiffness characteristics, there is a certain difference between the multi-stage gear transmission and the general gear transmission.
Under the influence of random factors, all kinds of nonlinear vibration responses of gears can be regarded as random processes.
The lumped mass method is used to establish the nonlinear vibration model of single degree of freedom gear transmission as
Optimize design variables The multi-stage gear reducer has the characteristics of complex structure. Considering the installation environment and conditions of
The integral time range of solving differential equations is 300tm. In order to solve this problem, it is necessary to
Under the same parameters, the author calculates the tooth thickness deviation of different tooth line radii in the same section,
When m = 4, z = 31, RT = 100 mm, 200 mm, 300 mm, 400 mm, respectively, measure the
The main structural design parameters of circular arc gear include pressure angle, tooth width, tooth radius, modulus, etc. Since there
The profile characteristics of circular arc cylindrical gear have important influence on gear design, tooth profile modification, lubrication, strength, etc.
In order to establish the accurate three-dimensional model of cylindrical gear with circular arc tooth profile and study the tooth
The forming principle diagram of cylindrical gear tooth surface with circular arc tooth line processed by parallel linkage mechanism is
The instrument model used for ultrasonic flaw detection is cts-1002 digital ultrasonic flaw detector. As the diameter of steel is
The lumped parameter method and ADAMS software are used to model and solve the dynamics of the same research system.
According to the above analysis, before the simulation starts, the relevant parameters are set, and the corresponding settings are carried
In ADAMS simulation software, for any mechanical system with motion constraints, the first Lagrange equation with Lagrange multiplier is used
