1. Different sealing objects: the piston seal is the seal between the cylinder body and the piston, and the piston rod seal refers to the seal between the piston rod and the cylinder head.
2. Different effects and consequences: if the piston seal is not well sealed, it will affect the performance of the oil cylinder, and if the piston rod seal is not well sealed, oil will leak.
3. The position of the sealing groove is different: the sealing groove of the piston seal is opened on the piston, and the sealing groove of the piston rod seal is opened on the hole.
4. The sealing rings used are different: the sealing ring of the piston seal is the shaft sealing ring, and the sealing ring of the piston rod seal is the hole sealing ring.
Hydraulic cylinder is composed of cylinder body, piston, piston rod, cylinder head and sealing ring.Piston hydraulic cylinders can be divided into two types: single rod type and double rod type. The fixing methods are fixed by the cylinder body and fixed by the piston rod. According to the effect of hydraulic pressure, there are single-acting type and double-acting type.
In the single-acting hydraulic cylinder, the pressure oil is only supplied to one cavity of the hydraulic cylinder, and the hydraulic pressure makes the cylinder move in one direction, and the opposite direction movement is realized by external force (such as spring force, self-weight or external load, etc.); The movement of the piston in the two directions of the action hydraulic cylinder is completed by the action of hydraulic pressure through the alternate oil intake of the two cavities.