Sealing structure for electric EGR (exhaust gas recirculation) valve
A technology of EGR valve and sealing structure, which is applied in the direction of shaft seal, valve details, valve device, etc., can solve problems such as center rod sticking, achieve the effect of preventing sticking, ensuring reliability and improving service life
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[0010] The present invention will be further described in detail below in conjunction with specific embodiments and drawings.
[0011] The center rod 2 of the electric EGR valve is sleeved in the center hole of the copper sleeve 1. The sealing structure of the electric EGR valve is as follows figure 1 Shown. The upper end of the copper sleeve is provided with an upper groove at the position of the center hole, and an upper sealing device is pressure riveted in the upper groove. The upper sealing device includes an upper PTFE sealing ring 21 and an upper thin gasket 31, and an upper PTFE The vinyl sealing ring 21 and the upper thin washer 31 pass through the central rod in sequence, and are pressure riveted in the upper groove in sequence from bottom to top. The upper PTFE sealing ring 21 is provided with an upper O-shaped sealing ring 41, and the upper PTFE sealing ring 21 is tightly fitted with the center rod through the tension of the upper O-shaped sealing ring 41, effectivel...
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