RECIPROCATING COMPRESSOR

摘要

A reciprocating compressor having a configuration in which the sliding loss between a shaft and a bearing is reduced without a reduction in the ability of supporting the shaft. A reciprocating compressor (100) is provided with a cylinder (5), a piston (4), a connecting rod (6), a shaft (1), and a bearing (2). The shaft (1) has a journal section (28) which is a portion covered with the bearing (2). The journal section (28) includes a first journal section (7) located on the side close to the connecting rod (6) with reference to the middle point (M) of the journal section (28) in the direction parallel to the rotation axis, and also includes a second journal section (8) located on the side far from the connecting rod (6) with reference to the middle point (M). The bearing (2) has a first slide section (10) for supporting the first journal section (7) and a second slide section (11) for supporting the second journal section (8). The first slide section (10) has a first recess (29) in at least one region selected from the region of 0 to 180 degrees and the region of 270 to 360 degrees, both the regions being defined relative to the direction of rotation of the shaft (1) when viewed from a reference position.