The working environment temperature of the hard-toothed cylindrical gear reducer has an impact on the selection of gear accuracy levels. The specific analysis is as follows:
High temperature environment
Thermal deformation problem: When the working environment temperature is high, such as in the hot rolling workshop of the steel plant, near the glass furnace, etc., the gears of the reducer will undergo dimension changes due to thermal expansion. High temperatures may cause changes in the gear tooth shape and pitch, causing the gear meshing accuracy to decrease. In order to ensure that good transmission accuracy and stability can be maintained at high temperatures, a higher accuracy level needs to be selected to reserve sufficient accuracy margin to compensate for the error caused by thermal deformation.
Changes in lubricating performance: High temperature will reduce the viscosity of the lubricating oil, affect the lubricating effect, resulting in increased friction between gears and intensified wear. This may increase the surface roughness of the gear and uneven wear of the tooth surface, which in turn affects the transmission accuracy of the gear. Therefore, in high temperature environments, in order to reduce the impact of wear on accuracy, gears with higher accuracy levels are also tended to be selected so that they can still meet the transmission requirements after a certain degree of wear.
Low temperature environment
Changes in material properties: In low-temperature environments, such as in cold storage, polar working equipment, etc., the physical properties of gear materials will change, which may become more brittle and have reduced toughness. This makes the gear more prone to defects such as cracks when it is subjected to loads, affecting the gear's accuracy retention ability. In order to reduce the impact of low temperature on gear performance and ensure the reliability and accuracy of gears at low temperatures, gears with higher accuracy levels may need to be selected to reduce the risk of accuracy loss caused by changes in material properties.
Lubrication problem: Low temperature will increase the viscosity of the lubricant and even solidify, resulting in poor lubrication of the gears and increase transmission resistance and wear. This will also have an adverse impact on the accuracy of the gears, so in low temperature environments, it may also be necessary to choose gears with higher accuracy levels to cope with the accuracy reduction caused by lubrication difficulties.
Environments with frequent temperature changes
Thermal fatigue problem: If the working environment temperature changes frequently, the gear will undergo repeated thermal expansion and contraction, which is prone to thermal fatigue, causing fatigue cracks, peeling and other damage to the tooth surface of the gear, thereby reducing the accuracy of the gear. In order to improve the gear's resistance to thermal fatigue in this environment and ensure transmission accuracy, gears with higher accuracy levels and better manufacturing processes need to be selected to enhance the overall performance and reliability of the gear.
