Research progress on thermal behavior of gear system
Gear system thermal behavior plays an important role in high-speed and heavy-load gear transmission, affecting the strength, life and safety […]
Gear system thermal behavior plays an important role in high-speed and heavy-load gear transmission, affecting the strength, life and safety […]
In order to study the comprehensive influence of meshing force and friction force on tooth surface, a simplified dynamic model
Firstly, the engagement process of the gear is analyzed. The engagement state and force diagram of the gear is shown
In addition to causing translation vibration of gear along the vertical engagement line, the friction moment will also form to
The thermal behavior of gear system is comprehensively studied.Based on thermal design and thermal check of gear transmission system, a
Cut and process the inspection gear along the axial direction and about 1/4 diameter into U-type impact test specimen, and
Metallographic structure evaluation of failed gears is carried out according to national inspection standards.The metallographic observation is etched with 4%
The vertical coal mill is shown in Figure 1.Reducer is an important part of coal mill and is mainly used
Balancing is a process that improves the mass distribution of the rotor to ensure that the vibration or vibration force
The modification parameters of the two gears are the same, the value range of the modification amount is [0, 0.022mm],
Gao Yun used the finite element method to analyze the stress of gear, determined the position of the maximum principal
The potential energy method is used to solve the time-varying meshing stiffness of gears.Each tooth is considered as a variable
To simulate the no-load knocking characteristics of gears, an angular acceleration excitation is applied in the torsional direction of the
In the figure, O1 and O2 are the rotation centers of large and small wheels, point D is the actual
In order to verify the validity of the solid element finite element model in this paper, the stress results of
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
The dynamic center distance of a gear pair at any time is the modulus of the difference between the vector
Centering of grinding teeth is the final procedure to ensure the accuracy of angular position of gears. Gear alignment accuracy
1. Maximum circumferential stress of ring gear in design specification Considering the influence of tooth parameters, load distortion of flexible
(1) The large gear is heated in the heating furnace. The heating temperature is controlled at 120 C for 3
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
With the increase of speed of gear transmission system, more and more attention has been paid to the research of
Harmonic gear reducer is widely used in robotics, aerospace and other fields due to its high transmission ratio, high load-carrying
(1) Big gears need to be pre-grinded after carburizing treatment, in order to eliminate heat treatment deformation before machining locating
1. Gear corrugation order noise and analysis A bewildering “ghost-step” noise occurs in the pre-production stage of a vehicle reducer
In the gear vibration and noise phenomena of the automobile industry, gear screeching and knocking are usually the most common
(1) To meet the high requirement of gear accuracy, foreign high-precision gear grinder is used for gear grinding. Specifically, German
Performance Analysis of Gears Produced by Two Processes The gear produced by a typical gear machining process is shown in
According to the principle of internal and external gear synchronous multi motor, an external involute gear is set in a
With the development of society, mechanization is becoming more and more popular, and the level of automation is increasing. Because
Samples are taken from the invalid gears, after grinding and polishing, the metallographic structure is observed by Olympus microscope, and
In many important fields such as industrial production, aerospace and military equipment, precision gear processing technology plays a key role,
As shown in the figure, when using the generating method to measure the big gear, the conical probe should start
Gears are usually divided into vehicle gears and industrial gears. According to the Convention, gears with a diameter greater than
The figure shows the gear drive with the number of teeth (Z1=31, Z2=32), modulus (m=6), pressure angle (a=20 degrees), crest
The diagram shows the variation trend of gear crest height coefficient when the number of teeth (Z1=31, Z2=32), modulus (m=6),
Because the former three machining methods are based on the simulation of meshing between the small wheel (or the profile
Dr. Stadtfeld of Greenson first outlined the idea of using disc wheel to machine face gear. It has the advantages
1. Basic profile parameters and definitions Taking the involute profile as an example, Figure shows an illustration of the involute
1. Gear Fracture and Analysis According to user feedback, the gear breaks under heavy load and the fracture occurs in
A gear tooth with fracture failure was randomly selected for fracture analysis. The fracture was cut off by wire cutting
Gear is a key structural part in modern transmission technology, its main function is to transmit torque reliably and without
The thermal behavior of the high-speed and heavy-duty gear system has a great influence on its bearing capacity. In the
Gear transmission system is the core mechanism of mechanical equipment, which determines the performance of the whole machine. But for
1. Numerical simulation and scientific problems of gear surface strengthening In the field of scientific research and engineering technology, numerical
The strengthening technology of gear heat treatment should pay attention to the control of surface integrity, that is, to control
The automobile gear is in the state of continuous load operation. There are rolling and sliding between the meshing surfaces
A new type of external rotor magnetic gear composite motor is proposed by combining the magnetic gear and the BLDCM.
Gear in place measurement refers to the measurement when the instrument is installed on the gear or on the machine
High end gear is the basic part of high-end equipment, and also the key neck clamping part. At the seminar,
In the field of gear measurement, the measurement of large and small gears has always been a technical problem, among
Normalizing treatment Normalizing is a heat treatment process in which the steel is heated to 30 ~ 50 ℃ or
Wang Liding’s team of academicians of Dalian University of technology has successfully developed a class 1 precision standard gear, and
Gear is one of the most widely used components in mechanical transmission system. Its main function is to transfer power
After a period of volatility, the recent gear steel market gradually tends to be stable, and the price is basically
Automobile gears are developing and improving in solving the problems of quality, cost, production efficiency, environment, safety, etc. At present,
Gear manufacturing technology is the key to obtain high quality gear. The gear processing technology, because of the gear structure