Design and Experimental Study on Divergent Magnetic Fluid Seal with Large Clearance and Dual Magnetic Sources

Table 1

Structural parameters of divergent magnetic fluid seal with large clearance.

Parameters	Sizes
Inner radius of the first pole shoe (mm)	14.1
Inner radius of the second pole shoe (mm)	17.8
Inner radius of the third pole shoe (mm)	21.5
Outer radius of the first/second/third pole shoe (mm)	36
Radius of the first step shaft (mm)	13.4/13.5/13.6/13.7
Step height (mm)	3.7
Inner radius of the first stage permanent magnet (mm)	21.5
Thickness of the first stage permanent magnet (mm)	6
Inner radius of the second stage permanent magnet (mm)	22.5
Thickness of the second stage permanent magnet (mm)	4.5
Outer radius of the first/second stage permanent magnet (mm)	32.5
Width of axial sealing clearance (mm)	0.4/0.5/0.6/0.7
Height of radial sealing clearance (mm)	0.4/0.5/0.6/0.7
Width of pole teeth (mm)	0.3
Height of pole teeth (mm)	0.7