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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

Inactive Publication Date: 2013-07-17
WUXI LONGSHENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is to provide an electric EGR valve sealing structure with high sealing performance, which solves the stuck problem of the central rod caused by factors such as carbon deposits, and further improves the reliability of the electric EGR operation

Method used

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  • Sealing structure for electric EGR (exhaust gas recirculation) valve

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Embodiment Construction

[0010] The present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

[0011] The center rod 2 of the electric EGR valve is set in the center hole of the copper sleeve 1, and the sealing structure of the electric EGR valve is as follows: figure 1 shown. The upper end of the copper sleeve is located at the position of the center hole and is provided with an upper groove, and an upper sealing device is riveted in the upper groove, and the upper sealing device includes an upper polytetrafluoroethylene sealing retaining ring 21 and an upper thin gasket 31, and the upper polytetrafluoroethylene The ethylene sealing retaining ring 21 and the upper thin gasket 31 pass through the central rod in sequence and are pressure riveted in the upper groove sequentially from bottom to top. An upper O-ring 41 is arranged inside the upper Teflon sealing ring 21, and the upper Teflon sealing ring 21 is closely matched with the...

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Abstract

The invention discloses a sealing structure for an electric EGR (exhaust gas recirculation) valve. An upper groove and a lower groove are arranged at an upper copper sleeve end and a lower copper sleeve end of the electric EGR valve, an upper sealing device is press-riveted in the upper groove and comprises an upper Teflon sealing retaining ring and an upper thin gasket sequentially press-riveted in the upper groove from bottom to top, an upper-O-shaped sealing retaining ring is arranged in the upper Teflon sealing retaining ring, a sealing device is arranged in the lower groove and comprises a lower Teflon sealing retaining ring, a washer and a lower thin gasket sequentially press-riveted at the lower copper sleeve end from top to bottom, and a lower O-shaped sealing retaining ring is arranged in the lower Teflon sealing retaining ring. The sealing structure can effectively prevent clamping stagnation of a central rod caused by carbon deposition, so that operating reliability of the electric EGR valve is guaranteed and the service life of the same is prolonged.

Description

technical field [0001] The invention relates to a novel sealing structure, in particular to a sealing structure applied to an electric EGR valve of an engine. Background technique [0002] The basic principle of the exhaust gas recirculation system is to introduce part of the exhaust gas from the engine into the intake system, so as to improve the combustion performance, reduce the formation of NOx in the engine exhaust gas and the emission of waste, and reduce the pollution to the atmosphere. The electric EGR valve is a mechatronic product installed on the engine to control the amount of exhaust gas recirculation fed back to the intake system. It is the most important and key component in the exhaust gas recirculation device. Its stable and reliable work directly affects In the normal operation of the engine, one of the main failure modes of the electric EGR valve is sticking, and the sealing structure plays a very important role in the sticking of the EGR valve. Since the...

Claims

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Application Information

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IPC IPC(8): F02M25/07F16K41/04F02M26/50F02M26/65
CPCY02T10/121Y02T10/12
Inventor 陆强
Owner WUXI LONGSHENG TECH
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