Views:8 Author:Site Editor Publish Time: 2019-01-14 Origin:Site
Gear wear refers to the process of friction and consumption of gear surface materials in the meshing process of gearbox. According to the damage mechanism of wear, it can be divided into adhesion wear, abrasive wear, surface fatigue wear, corrosion wear and so on. According to the wear depth of gears, wear can be divided into slight wear, medium wear and excessive wear. The scuffing wear of metal on two meshing surfaces of gears is caused by direct contact under certain pressure, relative movement after welding, metal tearing off from the tooth surface, or transfer from one tooth to another. Gear meshing is actually a relative rolling and sliding process. The action of these two forces causes the shear stress in the depth of the gear surface layer to produce fluctuating cyclic changes. Under the action of shear stress, the surface of gear teeth causes local metal spalling and damage. The damage forms are pitting fatigue peeling, shallow fatigue peeling and hardening layer fatigue peeling.
The gearboxes seen in daily life can be divided into seven categories according to their structural forms: involute cylindrical gearbox, cycloidal pinwheel fixed-axis transmission gearbox, arc cylindrical gear transmission gearbox, bevel gear transmission and hypoid gear transmission, worm transmission. Involute planetary gear transmission, non-circular gear transmission, etc. Different types of gear structure in the transmission speed ratio, transmission down. Speed, lubrication requirements, work reliability, cost efficiency and other aspects have different advantages and disadvantages, so in order to choose GearBox products that really suit their needs, we should seriously consider the following requirements:
1. The performance requirements of the gear box of the working machine: such as reliability, service life, noise, vibration, temperature rise and transmission accuracy.
2. The structure and dynamic parameters of the gearbox are required by the working machine, such as the size, quality, power, speed, efficiency, transmission ratio and load characteristics of the transmission mechanism.
3. Low cost, high efficiency, high precision and high reliability of gear products.
4. Advancement, rationality, economy and interchangeability of rack gear box technology.
There are many factors affecting gear damage, such as material selection, processing technology, installation and adjustment, which may lead to gear failure. The basic forms of gear damage in work are mainly divided into five categories: wear, tooth surface fatigue, gluing, plastic deformation and gear breakage.
Gear is a mechanical device to transmit motion and power. It has a long history. Gear transmission has the advantages of large speed ratio, large power transmission, high reliability, accurate transmission ratio and long service life. It is an indispensable transmission component of most mechanical equipment.