PISTON LUBRICATION APPARATUS FOR RECIPROCATING COMPRESSOR

摘要

PURPOSE: An apparatus for lubricating a piston of a reciprocating compressor is provided to reduce manufacturing cost of the compressor, by simplifying lubrication structure of a cylinder and the piston and allowing easy processing and assembly of a compression unit including the cylinder and the piston and a frame unit fixing the compression unit, using a piezoelectric cell generating ultrasonic vibration and mounted on an inside of the cylinder facing the piston to lubricate the cylinder and the piston. CONSTITUTION: A piezoelectric cell(145) is inserted and fixed to a piezoelectric cell mounting groove(141a) concavely formed on an inner circumferential surface of a cylinder(141), and has a power supply line(145a) penetrating the cylinder in radial direction, and connected with a coil(C) mounted to an outer stator(131) of a reciprocating motor to share power. A crystal plate of the piezoelectric cell is impressed with high frequency voltage using power source of the reciprocating motor to get inverse piezoelectric effect in which the crystal plate periodically expands and contracts to allow frequency of the voltage to be resonate with characteristic frequency thereof so that the crystal plate vibrates powerfully. A piston slides in the cylinder in such a manner that the piston linearly reciprocates in the cylinder using powerful and stable mechanical ultrasonic vibration due to the inverse piezoelectric effect.