PISTON FOR FLUID MACHINERY AND FLUID MACHINERY

摘要

PROBLEM TO BE SOLVED: To provide a piston for fluid machinery capable of reducing costs by reducing its weight and realizing highly precise machining in centerless machining. SOLUTION: The piston 20 has a head part 40 stored in a cylinder bore formed in a housing of a compressor and a neck part 41 operated and connected with a cam plate operated and connected with a rotary shaft of the compressor so as to rotate integrally through a shoe. The piston 20 has a side force pressure receiving wall 42A extending from a lower side of the head part 40 toward the neck part 41 and a guide wall 42B extending from an upper side of the head part 40 toward the neck part 41. The side force pressure receiving wall 42A is provided in such a way that it is eccentric on a preceding side in the direction of rotation of the cam plate. Moreover, the guide wall 42B is provided in such a way that it is eccentric on the opposite side to the direction of rotation of the cam plate.