Abstract: The present invention relates to a lubricating oil transport system in a compressor, in which: the rotating shaft (3) has at least one concavity (35) that extends over part of the rotating surface (33) in contact with the internal surface (11) of the rotor (1) and at least one restrictor hole (34) that communicates with the internal region of the rotating shaft (3) and with the concavity (35); the rotor (1) comprises a circumferential channel (12) and at least one radial channel (13) extending through the inner wall (11) of the rotor (1); the radial channel (13) is arranged around the circumferential channel (12); said circumferential channel (12) and the radial channel (13) communicating with the concavity (35); the circumferential channel (12), the radial channel (13) and the concavity (35) transport oil for cooling the upper part of the rotor (1) and the stator (2).

Abstract: A reciprocating compressor and, particularly, constructive details of lubricating oil pumps of reciprocating compressors. A constructive arrangement introduced on reciprocating compressor including helical pump of lubricating oil where the rotating shaft includes at least one lower region and at least one intermediate region. On the lower region of the rotating shaft, the lubricating oil is pumped by an internal channel of the rotating shaft and on the intermediate region of the rotating shaft, the lubricating oil is temporary stored and transferred, for the rotating shaft bearing region. The cooperating region between the retaining pin and the rotating shaft is limited by the lower region. The lower region of the rotating shaft includes, on its external side, a contouring recess. These two features prevent the cooperating region of the lower channel of the lubricant oil conduction suffering deformation by assembling the rotating shaft on the electrical engine rotor.