Non Rotating Wire Rope,Black Wire Rope,12Mm Wire Rope,Vinyl Coated Stainless Steel Cable Jiangsu Yasheng Metal Products Co.,Ltd , https://www.yswirerope.com
In the mixed lubrication state, when the gear is at 13 o'clock, the gear transmission is in the full-film fluid dynamic pressure lubrication state. In the full-mode state, the thickness of the lubricating oil film is much larger than the surface roughness, and the two sides are completely separated by the continuous oil film. The viscosity of the lubricating oil plays a leading role, and the full-film fluid dynamic pressure lubrication state is an ideal lubrication state.
Factors to be considered in the selection of gear lubricants At present, there is no uniform standard for the selection of gear lubricants in the world. Countries and relevant organizations have formulated various specifications for gear lubricants based on experience and experimental research. Some oils are recommended according to the speed, power, lubrication and transmission ratio; some engineering books recommend oil according to the center distance, ambient temperature and load level; some choose the oil viscosity according to the circumferential speed, tooth surface hardness and material. In terms of convenience in use, the factors affecting the lubrication state of the gear are extremely complicated. According to practical experience, the following important factors should be considered when selecting the appropriate gear lubricant and viscosity.
Considering the different principles of gear transmission from the principle of gear meshing, different requirements are imposed on the lubricant due to the different meshing characteristics. The involute spur gear and the helical gear are driven in parallel shaft, and the meshing line is substantially perpendicular to the sliding speed direction, so that the oil film forming condition is better. The worm-gear drive and the hyperbolic gear are equally meshed, and the angle between the meshing line and the relative speed direction is small, which is not conducive to the formation of the oil wedge. Therefore, these transmissions need high viscosity and contain certain additives to improve lubrication. condition.