Data Processing for Nonlinear Dynamic Acceleration Signal of Involute Spur Gear Drive System
1.The acceleration test signal is filtered with low-pass filter whose cut-off frequency is 10kHz, the highest response frequency of the […]
1.The acceleration test signal is filtered with low-pass filter whose cut-off frequency is 10kHz, the highest response frequency of the […]
Flexible ring gear is a spur cylindrical external gear, and the ring gear after assembly deformation presents straight bus deformation
1. Basic profile parameters and definitions Taking the involute profile as an example, the figure is an illustration of the
The analysis process of the dynamic backlash of the outer meshing pair composed of the sun wheel and the star
If there is tooth profile modification, the dynamic boundary condition of the modification area should be added on the basis
The dynamic center distance of a gear pair at any time is the modulus of the difference between the vector
1. Maximum circumferential stress of ring gear in design specification Considering the influence of tooth parameters, load distortion of flexible
In order to obtain the dynamic engagement stiffness in the process of gear transmission, besides determining the engagement positions, the
Figure 1 shows the calculation results of the load-dependent position of the rodent points on the standard and modified tooth
For the fixed shaft gear drive, the design parameters of each gear pair are different, the period of meshing stiffness
At present, the meshing force of gear in most models always follows the theoretical direction of meshing line, ignoring the
Flexible wheels are subject to alternating stress with an amplitude twice that of assembly stress. In the structural analysis of
When TE is greater than LTE at small wheel angle_1A under small load, it means that the clearance between teeth
The experimental research shows that the gear transmission system shows obvious non-linear vibration characteristics, and the traditional linear model can
The engagement position of individual gear teeth during gear transmission can be determined by analysis.In order to ensure the continuity
The engagement stiffness of the gear pair is calculated by applying the rotating speed of 2000r / min on the
Harmonic gear reducer is widely used in robotics, aerospace and other fields due to its high transmission ratio, high load-carrying
Most gear dynamic models assume that the meshing force is evenly distributed along the tooth width direction, but during actual
It is assumed that the centre of both gears is rigidly supported.In the meshing state of tooth surface, the relationship
The nonlinear time-varying model contains many nonlinear factors such as time-varying stiffness and clearance. Recently, with the development of nonlinear
The engagement state of the tooth surface can be determined by the formula at any time during the transmission process.From
It can be seen from the analysis that the dynamic boundary conditions α B (T) and the dynamic boundary conditions
1. Gear corrugation order noise and analysis A bewildering “ghost-step” noise occurs in the pre-production stage of a vehicle reducer
The three-dimensional solid model of involute spur gear drive is shown in the figure, and the following assumptions are used
In the process of gear transmission, in order to avoid jamming, clearance must be left between the sides of the
During gear transmission, changes in center distance cause changes in the direction of the engagement line, resulting in the actual
In the gear vibration and noise phenomena of the automobile industry, gear screeching and knocking are usually the most common
According to the method used in establishing dynamic model, the dynamic model of gear transmission system can be divided into
In calculating the dynamic meshing force of the gear, the influence of the degree of freedom of swing is neglected,
In order to ensure the continuity of gear drive, the overlap degree of gears is generally greater than 1, which
The main difference between the three-dimensional dynamic model of the sun-planetary gear and that of the fixed-shaft gear drive is
The three-dimensional solid model of the Involute Spur Planetary gear drive is shown in the figure, and the assumptions used
Lagrange method is used to establish the yaw-torsion coupling nonlinear dynamic model of fixed-axle gear drive. The Lagrange equation is:
The manufacturing error of gear not only affects the stability of power transmission, resulting in vibration noise and dynamic load
(1) Nonlinear dynamic model of yaw-torsion coupling of involute spur gear drive For involute spur fixed-shaft gear drive and planetary
In the linear time-invariant model of gear transmission system, all non-linear factors are neglected and the time-varying meshing stiffness is
With the global shortage of resources and the aggravation of environmental pollution, people pay more and more attention to the
Performance Analysis of Gears Produced by Two Processes The gear produced by a typical gear machining process is shown in
The figure shows the distribution cloud of the tooth surface contact temperature on the lubricant viscosity and the tooth side
The purpose of vibration and noise control of gear transmission is mainly to improve the dynamic performance of the transmission
Corrective measures According to heat treatment process inspection and finite element calculation results, the transmission staggered helical gear is quenched
The figure shows the distribution cloud of the tooth contact temperature in the clearance plane between the torque and the
Efficiency is a very important performance index for the transmission of power. Low transmission efficiency will not only result in
1. Calculation Model In order to investigate the contact stress on the tooth surface of this transmission staggered helical gear,
The figure shows torque T=10 N_m for four different lubrication states and oil viscosity 0=0.033At Pa_s, the distribution cloud of
The figure shows a cloud diagram of the temperature change of the tooth contact in the plane of the rotational
The working tooth profile of the hexagon-arc helical gear is composed of six segments of circular arcs. It adopts the
According to its main functions, gear transmission can be divided into motion transmission, power transmission, or both. The main function
The driving wheel of the staggered helical gear is made of 42Cr Mo, conditioned and tempered, while the driven wheel
Samples are taken from the invalid gears, after grinding and polishing, the metallographic structure is observed by Olympus microscope, and
The contact area mainly refers to the actual contact between the two bevel gears during meshing.The requirements for contact area
The figure shows the backlash Jn=0 mm and the lubricant viscosity 0=under 4 different lubrication conditions.0.033At Pa_s, a cloud diagram
Since the locking mechanism is based on an improvement of the Eastern Wind Mentoson 2nd generation differential, the size of
Gear force analysis can be concluded that the radius of curvature of the tooth root fillet is the main factor
Staggered helical gears are used to transmit the motion between two staggered shafts in space. For a single gear, they
After hardening or strengthening of gear surface by heat treatment, there are often black oxide skin or other defects, such
Test equipment: MH-6 micro Vickers hardness tester, TH300 Rockwell hardness tester, DMI5000M metallographic microscope Reference Standards: Metallographic examination of QC/T262-99
We can basically conclude that the root cause of tooth breakage and brittle failure of medium drive gear pair is
The figure shows the backlash Jn=0 mm and the lubricant viscosity 0=under 4 different lubrication conditions.0.033At Pa_s, a cloud diagram
According to the structural design data, digital modeling is carried out in SolidWorks software. (1) Design of end profile.Setting helical