Page 39 - 摩擦学学报2025年第10期

1436 摩擦学学报（中英文） 第 45 卷

(a) (b)

F=0.4 N

Three-dimensional Contact area
force sensor
z
y
(c)
x

Cantilever beam support
beryllium bronze
Lower specimen
v=229.3 mm/s Au-Co alloy
w=1 r/s

Fig. 5 Design of the tribology experiments: (a) the tribology equipment and the experimental condition, (b) bercllium bronze
cantilever beam sample; (c) Au-Co alloy commutator track
图 5 摩擦试验设计：(a) 摩擦试验装置及试验条件；(b) 铍青铜悬臂梁支撑；(c) Au-Co合金摩擦环道

(a) 8 hours forward (b) 8 hours reverse

0.33 Normal force Friction force 0.25 0.52 Normal force Friction force 0.00
Normal force/N 0.30 0.20 Friction force/N Normal force/N 0.42 −0.07 Friction force/N
0.47
−0.14
0.27
0.15
−0.21
0.37
0.24
0.21 0.10 0.32 −0.28
0 10 000 20 000 0 10 000 20 000
Time/s Time/s
(c) 0.2 99% prediction (d) 0.8 25%~75%
interval Median
0.1 Linear 0.6 Mean
Friction force/N −0.1 Increasing density → Friction coefficient 0.4
fitting
0.0

−0.2
F=0.817−2.316*N 0.2
−0.3 R =0.9786
2
0.0
0.30 0.40 0.50 Forward Reverse
Normal force/N
Fig. 6 Experimental results of normal load, friction force, and friction coefficient in 8 hours forward and reverse rotation
experiments: (a) trend of normal force and friction force in forward rotation experiment; (b) trend of normal force and friction force
in reverse rotation experiment; (c) linear fitting of normal force and friction force in forward and reverse rotation;
(d) normal box plot of friction coefficient in forward and reverse rotation
图 6 8 h正反向试验法向力、摩擦力和摩擦系数试验结果：(a) 正向试验法向力和摩擦力变化趋势；(b) 反向试验法向力和
摩擦力变化趋势；(c) 正反转法向力与摩擦力线性拟合；(d) 正反转摩擦系数正态箱线图

线性拟合，如图6(c)所示，在悬臂梁-平面摩擦副中，摩 擦对偶平面的初始形状参数略有区别，因此斜率与截
擦力与法向力在摩擦过程中近似呈线性负相关，该比 距会产生少量偏差(<10%)，但整体趋势相同. 相较于正
例系数为−2.316. 对于不同试验组别，由于悬臂梁和摩 向运动，反向运动的法向力增加. 一方面，在低载荷下，