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.
Round Open Water Cooling Tower
The whole structure is solid and light;the body and water pond is manufactured with reinforced glass fibre (FRP glass fiber reinforced plastics),never being corrosive. The surface finish is added with ultraviolet inhibitor,which can resist sunshine attack and damage.
All steel and iron material is processed through galvanizing by dipping,Ocorrosion resisting and durable.
Special designed axial-flow type air blower applies belt reduction gear,reducing low noise and sufficient wind; tailor-made water-drop noise
reduction carpet to eliminate water sound.
Apply special design PVC water block curtain (water-stop) to prevents plashing) remarkably; pressure drop loss is slight and splashing loss i under 0.001%.
Special designed water sprinkler with big bore diameter,which won' t cause blocking but the sprinkling effect is very good. It is installed in the tower,so it won' t bee polluted by outside dust and foreign matters.
Apply cellular vacuum molding heat dissipation material, stagger arrangement surface has grooves and the heat exchange effect is especially good.
Water pond applies slant design, easy to wash, containing less water; the operating weight is lower, but the water tank is very big, so it won't absorb air.
The cooling tower support is light and solid, convenient to assembly no matter there is suspension iron rack or not.
Round Open Water Cooling Tower,Water Cooling Tower,Round Cooling Tower,Cool Water Towers
Wuxi Ark Fluid Science Technology Co., Ltd. , https://www.fangzhou-arkfluid.com