Page 141 - 摩擦学学报2025年第10期

1538 摩擦学学报（中英文） 第 45 卷

Fixed wall
表 1 SFD主要参数
surface
Table 1 SFD main parameters
Parameter Specifications Outlet
Oil clearance, C/mm 0.385
Oil film width, L/mm 30
Outer diameter of oil film/mm 140
Inner diameter of oil film/mm 139.23
Inlet
Static eccentricity/mm 0.016 17
Whirl radius/mm 0.192 5
Whirl wall
Whirl frequency/Hz 100 surface
Supply pressure/kPa 20
Viscosity/(Pa·s) (313.15 K) 0.059 636 Fig. 2 Schematic diagram of SFD boundary conditions
图 2 SFD边界条件示意图

Start
Pressure/Pa
Modeling 2.919e+05
2.526e+05
Cloud map data 2.132e+05
1.739e+05
extraction 1.346e+05
9.528e+04
Negative Meshing 5. 595e+04
1.663e+04
grid −2.269e+04
−6.201e+04
Analyzing oil film −1.013e+05
Set the fluid static properties
domain 80
Floating- Set boundary 70 With air ingestion Without air ingestion
Stiffness/[10 5 /(N/m)] 40
θ=90°
θ=90°
point conditions 60 θ=180° θ=180°
θ=270°
θ=270°
escapes 50 θ=360° θ=360°
Air ingestion No air intake 30
20
10
Setting up calculation 0
monitoring 60 80 100 120 140 160 180 200
Whirl frequency/Hz
Setting up transient
iterations
Extraction law
No Yes Conclusion
Convergence
End
Fig. 3 Calculation flow chart
图 3 计算流程图

其余工况与表1中所列相同进行验算，结果如图4所示. 3.0
Literature value
不同进动角度下监控点仿真计算结果与文献[26]试验结 2.5 Simulation value
Oil film pressure/bar 0.5
果趋势一致，整体吻合良好，说明了模型及算法的正 2.0
1.5
确性. 1.0

2 空气吸入对油膜动特性影响规律分析 0.0

2.1 进动频率对油膜动特性影响分析 −0.5
−1.0
为了研究进动频率对空气吸入SFD油膜动特性系 −1.5
数影响规律，选取典型进动频率范围50~200 Hz开展 0.0 2.5 5.0 7.5 10.0 12.5 15.0
Circumferential coordinates/rad
分析，提取吸入/无吸入情况下的动特性系数，其分布 Fig. 4 Validation of the calculation method
规律如图5所示. 图 4 计算方法验证