Abstract
Since hydraulic cylinder used for the diet for manufacturing automobile parts always runs at a high temperature surrounding up to 300 degree, the O-ring used inside the hydraulic cylinder is easily deteriorated, which decreased the production efficiency due to the operation of exchanging the broken O-ring. It is thought that the deterioration is caused by the thermal hardening of the gum, so it is very important to cool the surroundings of O-ring and extend its life duration. However, since O-ring is amounted inside the hydraulic cylinder and it is difficult to cool the O-ring if the conventional cylinder construction is used. In this paper, a new spiral flow path inside the cylinder for cooling the O-ring is suggested and produced. Through computer simulation and experimental verification, it was confirmed that an outstanding cooling performance was obtained. Besides, the O-ring thermal hardening effect was improved when O-ring was cooled by the new spiral flow path.
