The main role of the piston is to withstand the combustion pressure in the cylinder and transmit this force to the crankshaft through the piston pin and connecting rod.The piston refrigeration compressor mainly uses the reciprocating movement of the piston in the cylinder to produce periodic changes in the working volume of the cylinder to achieve the suction, compression and discharge of the refrigerant gas.
Piston compressor is a compressor that relies on the reciprocating movement of the piston to pressurize and transport the gas. It is mainly composed of working chamber, transmission parts, fuselage and auxiliary parts. The working chamber is directly used to compress gas and is composed of a cylinder, cylinder liner, air valve, packing, piston and piston rod. The piston is driven by the piston rod for reciprocating movement in the cylinder, and the volume of the working chamber on both sides of the piston changes in turn. The volume decreases on one side because the pressure increases and the gas is discharged through the valve, and the volume increases on the side because the pressure decreases and the gas is absorbed through the valve. The transmission parts are used to achieve reciprocating movement, including crankshaft connecting rod, eccentric slider, swash plate, etc. Among them, the crankshaft connecting rod mechanism is the most commonly used, which is composed of crosshead, connecting rod and crankshaft.
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