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

Table 1

Related equipment and facilities in the station.

Temperature	Initial friction A	Extended friction A	Lubrication friction A	Initial friction B	Extended friction B	Lubrication friction B
−25	0.09	1.83	1.54	0.95	1.3	1.55
0	3.75	3.44	3.71	2.81	2.42	2.83
25	5.82	2.37	3.62	2.9	4.62	2.95
50	1.58	5.28	3.41	2.69	3.29	4.49
75	3.18	3.33	3	3.22	4.24	3.45