LNP-Guide_Plastic_Gearing——齿轮设计指导书.pdf

A GE Plastics Company A Guide to Plastic Gearing Gears Gears lastic gears have positioned themselves as seri- thermal behavior of thermoplastics has frustrated those P ous alternatives to traditional metal gears in a wide variety who would attempt to interpolate these values from more of applications. The use of plastic gears has expanded readily available information. from low power, precision motion transmission into more demanding power transmission applications. As designers Nonetheless, there are certain guidelines available for push the limits of acceptable plastic gear applications, estimating the technical feasibility of using thermoplastic more is learned about the behavior of plastics in gearing materials in gears. Most of these techniques have evolved and how to take advantage of their unique characteristics. from equations originally worked out for metals, and Plastic gears provide a number of advantages over metal gears. They have less weight, lower inertia, and run much quieter than their metal counterparts. Plastic gears often require no lubrication or can be compounded with internal lubricants such as PTFE or silicone. Plastic gears usually Figure have a lower unit cost than metal gears, and can be 1 designed to incorporate other features needed in the assembly (part consolidation). These gears are also resistant to many corrosive environments. The