| 主权项 |
1. A relief valve for exhaust gas turbochargers, comprising; a valve housing; a valve disk that cooperates with a valve seat; a valve stem guided in the valve housing, the valve stem having an overall length, a first end that extends at most to a midpoint of the overall length of the valve stem and a second end opposite the first end, the valve disk being at the second end of the valve stem, wherein a space is provided in the valve housing; a diaphragm arranged in the space and connected to the valve stem, wherein the diaphragm has an outer periphery connected to the valve housing with a sealing effect; a radiation shield plate located completely in the housing in the space on a side of the diaphragm facing the valve disk and a certain distance away from the diaphragm so as to extend around the first end of the valve stem, wherein the plate divides the space into two chambers, namely, a first chamber bounded by the diaphragm and the radiation shield plate, and a second chamber, bounded by the radiation shield plate and a wall of the valve housing, wherein, in an area of the chambers, the valve housing has an outer periphery with at least one air inlet for supplying air, wherein at least some of the air entering through the air inlet flows through the housing along the valve stem toward the valve disk, wherein the radiation shield plate has at least one opening allowing passage of the air, whereby air flows continuously through the first chamber formed by the diaphragm and the radiation shield plate, and wherein the air leaving the first chamber proceeds via a ring-shaped gap between the valve stem and the radiation shield plate. |
