OPERATIONAL PERFORMANCE OF FLEXIBLE PRESSURE SHELL IN PNEUMATIC JACK
There are given experiment results for square flexible pressure shell (FPS) which is designed for load lifting or spacer force production in pneumatic jack. Compressed air is fed into FPS cavity and creates internal pressure. It was revealed that the performance curve (load-lifting height - load weight) of square FPS sizing 370´370´25mmrepresents a hyperbola. Therewere obtained FPS general state equation in dimensionless form and two dimensionless constants which determine operational performance of squared FPS for any size. Received results are interesting from practical point of view and can be used when developing the design of required load-carrying capacity and load-lifting height.