Rotor of compressor

A compressor comprising:

• a sealed shell having a suction pipe and a discharge pipe;
• a compression part coupled with a rotation shaft to compress gaseous refrigerant introduced into the shell;
• and
• a driving part comprising an oil scattering prevention device including:
• a stack having a plurality of discs are stacked around the rotation shaft;
• at least one gaseous refrigerant passage vertically penetrating the stack having an inner wall, said inner wall comprising a portion nearest an outer circumference of the stack and another portion nearest an inner circumference of the stack;
• an end cover mounted on the upper side of the stack and another end cover mounted on the lower side of the stack, wherein each end cover comprises penetrating holes aligned with said at least one gaseous refrigerant passage:
• a prevention plate disposed in the at least one gaseous refrigerant passage for preventing oil from passing through and leaking out of the stack, wherein the prevention plate is in full contact with the portion of the inner wall of the at least one gaseous refrigerant passage nearest the outer circumference of the stack and only partially contacts the portion of the inner wall of the at least one gaseous refrigerant passage nearest the inner circumference of the stack, and wherein the prevention plate is removable from the at least one gaseous refrigerant passage;
• and
• an upper insulation block and a lower insulation block, each comprising a through-hole aligned with the corresponding penetrating hole of its respective end cover, the upper and lower insulation blocks being inserted into the at least one gaseous refrigerant passage and respectively contacting the upper and lower sides of the prevention plate via at least two supporting steps formed on the respective upper and lower insulation blocks.