Horizontally or vertically reciprocating mechanism - has fluid and air pressures applied to opposite sides of piston

摘要

The hydraulic hammer, pile-driver or vibrator, horizontally or vertically reciprocating , has a piston working in a cylinder. Fluid pressure is applied to one side of the piston, and positive or negative air pressure to the other. There can be two or more pistons with cylinders, working separately or together, and there can be a separation chamber or air lock between the fluid and the compression and vacuum chambers. This air lock can be formed both in the piston and in the cylinder wall.