| 摘要 |
PURPOSE:To prevent an effect caused by magnetic field of balancers when a compressor starts and to balance a rotational shaft securely, by forming a balancer for permitting the rotational shaft to balance rotationally of a sintered material mainly composed of iron and nickel of 1-15%. CONSTITUTION:An electric compressor assembly 5 is accommodated in a closed case 1, the assembly 5 is provided with a motor 3 at its upper side and a compressor 4 at its lower side through a rotational shaft 2. A rotor 6 constructing the motor unit 3 has upper and lower surfaces with balancers 18, 19 mounted thereon for respective first and second unbalances in order that an unbalance force produced when an eccentric portion 10a and a roller 11 rotate eccentrically is removed. In this case, the respective balancers 18, 19 are formed of a sintered material mainly composed of iron and nickel of 1-15%. With such an arrangement, an effect caused by magnetic field of the balancers 18, 19 when a compressor starts is removed and the rotational shaft 2 is securely balanced. |
