Page 154 - 《摩擦学学报》2021年第3期

第 3 期 夏延秋, 等: 轴电流作用下电机轴承润滑脂研究进展 443

A
B

10 μm 10 μm

(a) Composite lithium grease (b) Composite lithium grease + sodium
montmorillonite

10 μm 10 μm

(c) Composite lithium grease + inorganic (d) Composite lithium grease + organic
montmorillonite montmorillonite

Fig. 12 wear surface morphology under current carrying condition
图 12 载流条件下的磨损表面形貌

(a) 7.5 OMMT grease (b)
OMMT grease
IOMMT grease 9×10 11 IOMMT grease
AC breakdown voltage/kV 6.5 SiO 2 grease Volume resistivity/(Ω·cm) 8×10 11 11 SiO 2 grease
7.0
MMT grease
MMT grease
7×10
6.0
5.5

5×10
5.0 6×10 11 11
0.0 0.5 1.0 1.5 0.0 0.5 1.0 1.5 2.0
Additives concentration/% Additives concentration/%

Fig. 13 Breakdown voltage (a) and volume resistivity (b) of montmorillonite grease
图 13 蒙脱石型润滑脂的击穿电压(a)和体积电阻率(b)

表 1 研制润滑脂理化性能
Table 1 Physical and chemical properties of developed grease

Grease Dropping point/℃ Penetration (1/4 mm) Copper corrosion Conductivity/10 -4
LB104 253 73 1a 21.5
LB106 267 66 1a 8.76
Graphene complex 313 64 1a 3.28
Carbon nanotube composites 332 63 1a 23.6
PAO 10 327 68 1a 0