An abrasion preventing device for a hermetic reciprocating compressor. The device releases the impact generated between the slider and the shell of the compressor, thus to prevent possible abrasion of the contact part between the slider and the shell as well as abrasion of the piston. The device comprises a cylinder and a piston received and reciprocating in the cylinder, an end of the piston having a coupling projection. A shell, which is coupled to the piston, has a coupling projection. A bolt and nuts are used for coupling the piston to the shell by coupling the projections of both the piston and the shell to each other. A spring is provided on a coupling portion between the piston and the shell for absorbing the impact caused by striking of a slider on the shell during an operation of the compressor.
A slider of a closed-type compressor in which friction and abrasion of an inside circumferential surface of a slider shell and an outside circumferential surface of the slider can be reduced by forming a circular arc at both portions where the outside circumferential surface of the slider contacts the inside circumferential surface of the slider shell. The slider of the closed-type compressor has a circular arc portion at the inside portion of both ends of the outside circumferential surface of the slider and both outside portions of a central groove of the slider, respectively.
Connecting rod and piston coupling structure of a compressor by which the working efficiency is increased by simplification of assembling operation and abrasion is reduced between a piston and a cylinder bore, the structure comprising a plane section of the piston to refrain the connecting rod from being protruded out of the piston and to get a small diameter part of the connecting rod to be placed thereon, and a round-shaped protruded circulating shaft perpendicularly extended from the plane section of the piston and formed to be inserted into a small diameter part hole of the connecting rod.
An apparatus for preventing abrasion in a reciprocal compressor, including a cylinder, a reciprocal motor having a stator and a mover, and generating a linear reciprocation driving force, a piston inserted into an inside space of the cylinder to be linearly movable, a piston rod coupled to the piston to be movable in the radial direction of the piston, and coupled to the mover of the reciprocal motor, for transmitting the linear reciprocation driving force of the reciprocal motor to the piston, and a concentricity control means coupled to a junction between the piston and the piston rod, for fixing the piston and the piston rod in the axial direction, and allowing a relative motion thereof in the radial direction. The apparatus prevents abrasion from being generated between the cylinder and the piston due to processing errors and assembly errors of components of the reciprocal compressor.
