Main shaft seal structure of engine EGR cooler bypass valve

The invention relates to a main shaft seal structure of an engine EGR cooler bypass valve, and belongs to the field of engines. The structure comprises a main shaft, a main shaft seat with a cavity, ashaft cap and a rocker arm, wherein the main shaft seat, the shaft cap and the rocker arm are sequen...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	YUE KAIGUO, DAI YUNHUI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS COMBUSTION ENGINES DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to a main shaft seal structure of an engine EGR cooler bypass valve, and belongs to the field of engines. The structure comprises a main shaft, a main shaft seat with a cavity, ashaft cap and a rocker arm, wherein the main shaft seat, the shaft cap and the rocker arm are sequentially arranged on the main shaft in a sleeving manner. Annular graphite arranged on the main shaftin a sleeving manner, a T-shaped guide sleeve, an annular sleeve and a sealing ring are sequentially arranged in the cavity of the main shaft seat. The main shaft seat is arranged on a step of the main shaft in a sleeving manner, and a first step is arranged in the cavity of the main shaft seat. The annular graphite is in contact with the bottom face and the side wall of the cavity of the main shaft seat. One end face of the T-shaped guide sleeve is in contact with the annular graphite, and a clearance is reserved between the other end face of the T-shaped guide sleeve and the first step in the cavity of the main shaf