A study on the effect of the shape on performance of mounted cushions in hydraulic cylinders

Today hydraulic operating system technology is wide spread into all sectors of manufacturing, agriculture, aerospace and marine industries where accuracy, precision and flexibility of applying force is very important. So due to the growing usefulness of hydraulic cylinders with precise and controlled operation in various industries, the need for control of piston speed is necessary. Therefore in this research, design, fabrication and evaluation of 5 different hydraulic cushions have been considered in order to optimize the stopping mechanism of pistons at the end of the course. In this article the comparison of 5 cushion spears including Circular, Conical, Sagittal, Double conical and Parabolic cushion have been studied with reviewing the motion behavior of piston and measuring the parameters such as displacement, speed, acceleration, flow rate and hydraulic pressure in an one way hydraulic cylinder. Results showed that the sagittal cushion with maximum pressure increasing of 1.98% for 200 kg load and 0.35% for 350 kg load had the lowest percentage of hydraulic pressure rise and circular cushion with maximum pressure increasing of 11.98% for 200 kg load and 3.92% for 350 kg load had highest percentage of hydraulic pressure rise.