Reciprocating compressor having an oil pump

A reciprocating compressor comprises: a casing; an oil pump (32) attached to the casing and configured to pump oil through the compressor; a crankshaft adapter (48) that connects the oil pump (32) to the compressor; and a housing (80) interposed between the casing and the oil pump (32) and configured to house the crankshaft adapter (48). The housing (80) includes: a shell forming a round cavity (86) configured to receive the crankshaft adapter (48); an oil feed conduit (82) configured to enter through the shell into the round cavity (86) and to deliver oil; a first drain conduit (88), opposite to the oil feed conduit, and configured to enter through the shell into the round cavity (86) and to drain the oil from the round cavity (86); a plug (90) provided in the first drain conduit (88) to reduce an amount of oil drained away from the round cavity (86); and a second drain conduit (96) configured to enter through the shell (91) into the round cavity (86) and to drain away oil from the round cavity (86). The second drain conduit (96) is located between the oil feed conduit (82) and the first drain conduit (88), substantially between 50 and 130 degrees relative to the first drain conduit (88) on a periphery of the shell.