| 摘要 |
PROBLEM TO BE SOLVED: To simplify a manufacturing process of a compression mechanism part, by balancing out a centrifugal force acting on a rotational shaft by a crankshaft itself and minimizing the centrifugal force acting on a main shaft and thereby to simplify the compressor mechanism part, and to simplify a manufacturing process of the compression mechanism part, by balancing out a centrifugal force acting on the rotational shaft of a rotary compressor by an eccentric shaft part and minimizing the centrifugal force acting on the main shaft, since the bending moment acting on the main shaft is increased by high-speed operation by an inverter control recently, an upper part of the main shaft is brought into contact with a main bearing to cause generation and input of seizing and scratching or increase in vibration and noise in the main bearing. SOLUTION: High-specific heavy metal or the like is inserted and disposed at the crankshaft eccentric part so that the center of the gravity of the crankshaft is on a center axis of the main shaft. Therefore, imbalance is balanced out by the crankshaft eccentric part itself, a load or vibrations caused by the imbalance is reduced without complicated structure, by eliminating the need of attaching a balancer from the outside. COPYRIGHT: (C)2009,JPO&INPIT
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