PURPOSE: To improve durability of a liquid refrigerant conveyer by providing a shaft of constituting a displacement type compressing machine part, bearing for supporting the shaft and a ball bearing stored in this shaft supporting bearing to support the shaft and sealed with grease of containing MoS2.
CONSTITUTION: A shaft 20 is rotated by a motor constituted of a stator 3 and a rotor 4, to eccentrically rotate a roller 6 according to this rotation of the shaft 20, and a liquid refrigerant, guided into a cylinder from a heat conveying cycle by passing through a pipe All, is compressed and released into a case 2 through a port 10. The liquid refrigerant released into the case 2, passing through a pipe B12, is fed out to the heat conveying cycle. The shaft 20, main bearing 21 and a subbearing 22 perform rolling rotation by ball bearings 23, 24. A seal material 23e of chloroprene rubber is provided in the ball bearing 23, and a chamber, formed by an outer ring 23a, inner ring 23d and the seal material 23e of chloroprene rubber, is sealed with grease 23f contained with MoS2.
KAWAI HIDEKI
AWASHIMA HIROKI
