文档介绍：Right Choice of Engineering Polymers
for High Performance Gears
采用工程塑料是高性能齿轮的明智选择
DuPont Engineering Polymers
Jul 2007
2
Content 内容
•Why use plastics for gears? 为何选用塑料于齿轮上?
•Applications for plastic gears 塑料齿轮的应用
power 动力vs. motion transmission 运转传送
•Top engineering polymers for gears 齿轮首选工程塑料
• New Low Wear / Low Friction Resins and Applications
最新的低摩擦、、低磨耗系列塑料及其应用低磨耗系列塑料及其应用
7/30/2007
3
Why Use Plastics for Gears? 为何选用塑料于齿轮上
Lubricity 自润性 Noise Reduction 减低噪音
low impact noise
internally lubricated grades available
reduce high pitch squeak
low wear/low friction
Cost Efficiency 成本效益 Shock Resistance 避震
parts consolidation toughened grades available
multiple gear clusters intrinsic resilience
Chemical Resistance 耐化学性能 Durability 耐用
semi-crystalline polymers fatigue endurance
grease resistance/corrosion resistance creep resistance
Weight Reduction 减低重量
low specific gravity
reduce inertia/total assembly weight
7/30/2007
4
Applications for Plastic Gears –塑料齿轮的应用
General Types 一般分类
• Power Transmission 动力传送
- high loads/low speed
- high torque
- motor used to develop work or carry a load
- part life extends until gear breaks
- external lubrication
- steel countersurface
• Motion Transmission 运转传送
- low loads/high speed
- motor used to move or position a device
- part life extends until gear wears
- internal lubrication desired
- countersurface of plastic
7/30/2007
Plastic Gears Applications 塑料齿轮应用
Steering
Drive 驾驶方向
齿轮牙表面应力 Window Lift, 窗门提起
Wind Shield Wiper 雨刷
Stress on Teeth Surface (N) Surface Teeth on Stress
Office Automation 办公室设备,
Audio, Video 影音器材
0 50 100
0 50 100
Frequency of Gear Engaging (rpm)
齿轮转速
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Plastic Gears Applications 塑料齿轮应用
High loads involved
Motor used to develop a work or to carry a load
Power Part life is until gear breaks
Transmission 动力传送
高负荷
电机用作带动负荷部件, 壽命决定于齿轮断裂
Low loads involved
Motor used to move or position a