To hardly generate a fluctuating noise in a discharge muffler by fixing a compression part and a sealed case to each other on an outer periphery of a main bearing, and discharging delivery gas to a main bearing side which is not dipped in a refrigerator oil.
A delivery part 11 is arranged on a main bearing 9, gas compressed in a cylinder 2 is delivered in a discharging muffler 12 through the delivery part 11. The delivery muffler 12 is partitioned into a first delivery chamber 20 and a second delivery chamber 21 by a baffle 19. A pass hole is opened on the buffle 19, gas released through the delivery part 11 is throttled again, pulsation component of gas is reduced, and gas is released to the second chamber. A small hole is arranged on the discharging muffler 12, and discharging gas is released into a sealed case after delivery gas is throttled. A shaft hollow part 23 is arranged on a shaft 3, the inner circumference 17 of the delivery muffler 12 is pressed in a boss part 18 of the main bearing. An inner diameter near a press-in part of the boss part 18 is contracted by distortion of press-in, and a press-in position is set at a position of the hollow part 23 of the shaft 3.
WATAKABE SHUNZO
MATSUMOTO TAKESHI
SATO JUN
IWATA HIROMITSU
