The low-speed heavy-duty transmission has low sliding speed, low lubrication clearance and low friction heat for low-speed heavy-duty transmission. Therefore, temperature rise is not a major problem. It is important that the viscosity of the lubricating oil be high enough that the oil delivery rate in the meshing zone is large enough to maintain a sufficiently thick film thickness between the tooth faces. Due to the limitation of such a transmission, the bending strength of the root is often large, which causes the tooth tip circle of the gear to increase, so that the starting meshing point B2 is closer to the theoretical intermeshing point N1, and the Hertz stress increases. In addition, for low-speed transmission, the gear accuracy is often chosen to be low (the gear accuracy is usually selected according to the speed T, which is very incomplete), the tooth surface contact accuracy is low, and during normal starting, there is often a short-term overload. . These all have an adverse effect on the lubrication state. To this end, gears should be designed with these factors in mind to control and eliminate these disadvantages.
It is advisable to use a large meshing angle to improve the formation condition of the lubricating oil film, reduce the Hertz stress, and thus reduce the friction heat. a) Oil bath lubrication (b) Lubrication of the pressure oil supply lubricating gear transmission. When the transmission ratio i is large, a large contact stress is generated in the intermeshing section, and the angular displacement positive transmission should be adopted so that the starting meshing point is as close as possible to the node. It is advisable to use a lubricant with high viscosity and good oil properties. Multi-stage transmission For multi-stage transmission, in the low-speed stage, it is desirable to use high-viscosity lubricating oil to ensure sufficient oil film thickness to maintain elastic fluid lubrication or mixed lubrication. For high-speed grades, low-viscosity lubricating oil is required to reduce Friction and heat. However, due to structural design constraints, high and low speed drives can only use lubricants of the same viscosity. Considering the poor lubrication state of the low speed grade, it is appropriate to take care of the low speed grade for oil selection. Also pay attention to the cooling and cooling of the high-speed stage. The reasonable design of the profile parameters and the design of the gear structure can compensate for the adverse effects of high viscosity of the lubricating oil on the high speed stage.
Air filter is an important Nitrogen Generator parts and components, they are used to get rid of waters from the compressed air provided by Air Compressor, Air filter also removes the dust and the oil, getting clean and dry air for the nitrogen generator. It
is very important for the whole system of nitrogen/oxygen
generator.There are three levels of air filters needed for a nitrogen
generation system.
For nitrogen generator, normally there are three levels air filters, C T A levels, the filtration level goes higher and higher. At the outlet of last air filter, the dust diameter can be 0.01 um. Because the air filter is used to block impurities, so the dust, water,etc is blocked in the filter element, so the filter element should be replaced after one year operation.
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