2020-05-09 17:15:06 0
temperature
When the bearing operating temperature increases by 10~15℃, the bearing life of the grease will be reduced by half;
Choose high-temperature grease and focus on the dropping point, evaporation, oxidation stability, high-temperature baking test and other properties of the grease.
When choosing low temperature grease, attention should be paid to similar viscosity and low temperature torque at low temperature.
Effect of temperature on oxidation rate
Greases for rolling bearings according to temperature
轴承的使用温度，℃ | 润滑脂类型 |
50~60 | 钙基脂 |
100（短期到120） | 锂基脂 |
150（短期到180） | 酰胺钠基脂、复合锂基脂、聚脲润滑脂 |
250（短期到300） | 特种有机稠化剂（聚脲、PTFE） |
-40~150 | 低温润滑脂 |
按照温度选择润滑脂
润滑脂 | 润滑脂的主要性能与应用 | |||||||
稠化剂 | 基础油 | 使用温度，℃ | 滴点，℃ | 抗水DIN51807 | 防腐性DIN51802 | 极压性 | 对滚动轴承适应性 | 应用 |
12羟钙 | 矿油 | -02~70 | <130 | 0~40 | 0/2 | + + | - - | 密封润滑脂 |
锂皂 | 矿油 | -30~120 | <200 | 0/2~90 | 0/3 | + | + + + | 标准滚动轴承脂 |
酯类油 | -60~120 | <200 | 0/2~90 | 0/3 | + | + + + | 高、低温，高速脂 | |
聚醚 | -40~140 | ≈200 | 1/2~90 | 1/5 | + + | + + | 高温脂 | |
硅油 | -60~160 | ≈200 | 0~90 | 0/3 | - - | + + | 高、低温脂 | |
钠皂 | 矿油 | -20~100 | 130~200 | 3~90 | 2/5 | + | + + | 标准滚动轴承脂 |
铝皂 | 矿油 | -20~70 | <100 | 0~40 | / | + | - - | 抗水密封脂 |
复合铝皂 | 矿油 | -30~140 | >230 | 0/1~90 | 0/3 | + + | + + + | 高温脂 |
复合钡皂 | 矿油 | -30~120 | >200 | 0~90 | 0/1 | + + + | + + + | 极压脂 |
酯类油 | -40~120 | >200 | 0~90 | 0/1 | + + + | + + + | 高速、极压、低温脂 | |
复合钙皂 | 矿油 | -30~120 | >200 | 0~90 | 0/1 | + + + | + + + | 极压脂、密封脂 |
酯类油 | -50~140 | >200 | 0~90 | 0/1 | + + + | + + | 高速、极压、低温脂 | |
复合钠皂 | 矿油 | -30~160 | >220 | 1~90 | 0/1 | + + | + + + | 高温脂 |
硅油 | -50~200 | >220 | 1~90 | 0/1 | - - | + + | 长寿命脂 | |
复合锂皂 | 矿油 | -30~140 | >250 | 1~90 | / | + | + + + | 高温多效脂 |
酯类油 | -50~160 | >250 | 1~90 | / | + | + + + | 宽温多效脂 | |
膨润土 | 矿油或酯类油 | -30~160 | >220 | 0~90 | 0/5 | + + | + + + | 高温脂 |
聚脲 | 矿油 | -20~160 | >250 | 0~90 | 0/1 | - | + + | 高温长寿命脂 |
酯类油 | -40~180 | >250 | 0~90 | 0/1 | - | + + | 高低温长寿命脂 | |
聚苯醚 | -5~200 | >250 | 0~90 | 0/1 | + + | + + | 高温长寿命脂 | |
硅油 | -60~250 | >250 | 0~90 | 0/1 | - - | + + | 宽温润滑脂 | |
PTFE、FEP | 硅油 | -50~200 | 无 | 0~90 | 0/3 | - - | + + | 高低温长寿命脂 |
全氟聚醚 | -40~260 | / | 0~90 | 0/1 | + + | + + | 高温抗化学终生润滑脂 | |
+ + + Is very good, + + is good, + is average,-poor,--poor.
0 is the best anti-rust; 1 is better; 2 is average; 3 is not good; 5 is poor.
Comparison of high-temperature oxidation stability of typical greases
脂名称 | 压力降磅/英寸2 | 锥入度变化 | |||
24h | 48h | 72h | 96h | ||
脲基脂A | 3 | 5 | 10 | 18 | +90 |
脲基脂B | 1 | 2 | 4 | 5 | +22 |
脲基脂C | 2 | 3 | 6 | 8 | +18 |
锂基脂C | 4 | 6 | 25 | 60 | 流体 |
锂基脂B | 5 | 15 | 22 | 55 | 流体 |
复合铝基脂 | 8 | 21 | 38 | 48 | 流体 |
复合钙基脂 | 3 | 6 | 28 | 45 | 流体 |
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