Optimization Technology of Frequency Conversion Constant Pressure Control System of Mine Emulsion Pump Station in Electrical Engineering and Automation Specialty

Table 2

Change of friction coefficient of drawing fluid B lubrication.

Item	Filter	Measure	Supercharge	Regulate	Split
Scar	1.42	0.4	1.68	1.03	1.23
SEM	2.93	2.46	1.85	2.56	1.93
Rubber	2.9	2.65	5.44	5.87	4.64
Surface	4.56	4.28	2.06	1.59	1.3
Alloy ball	4.29	3.16	1.54	2.73	3.68
FEI	2.14	2.59	4.18	2.71	4.27