Fluid machinery, heat exchange equipment, and operating method for fluid machinery

Fluid machinery (100), comprising:

• a rotating shaft (10);
• a cylinder (20), the axis of the rotating shaft (10) and the axis of the cylinder (20) being eccentric to each other and at a fixed eccentric distance;
• and
• a piston component (30), the piston component (30) being provided with a variable volume cavity (31), the piston component (30) being pivotally provided in the cylinder (20), and the rotating shaft (10) being drivingly connected with the piston component (30) to change the volume of the variable volume cavity (31);
• an upper flange (50) and a lower flange (60), the cylinder (20) being sandwiched between the upper flange (50) and the lower flange (60), wherein the piston component (30) comprises:
• a piston sleeve (33), the piston sleeve (33) being pivotally provided in the cylinder (20);
• and
• a piston (32), the piston (32) being slidably provided in the piston sleeve (33) to form the variable volume cavity (31), and the variable volume cavity (31) being located in a sliding direction of the piston (32), wherein the piston (32) is provided with a sliding hole (321) running through the axial direction of the rotating shaft (10), the rotating shaft (10) penetrates through the sliding hole (321), and the piston (32) rotates along with the rotating shaft (10) under the driving of the rotating shaft (10) and slides in the piston sleeve (33) along a direction vertical to the axial direction of the rotating shaft (10) in a reciprocating manner, the sliding hole (321) is an slotted hole or a waist-shaped hole, the rotating shaft (10) is provided with a sliding segment (11) in sliding fit with the piston component (30), the sliding segment (11) is located between two ends of the rotating shaft (10), and the sliding segment (11) is provided with sliding fit surfaces (111), the sliding fit surfaces (111) are symmetrically provided on two sides of the sliding segment (11), the sliding fit surfaces (111) are parallel with an axial plane of the rotating shaft (10), and the sliding fit surfaces (111) are in sliding fit with an inner wall surface of the sliding hole (321) of the piston (32), a slip direction of the piston (32) is vertical to the axial direction of the rotating shaft (10), the rotating shaft (10) is a one-piece structure that is penetrating through the upper flange and the lower flange.