| 摘要 |
PURPOSE:To aim at equalization of unbalanced force in compression elements with a balancer being formed solidly with a ring, by setting up a larger diametral end ring than an outer diameter of a rotor core at the compression element side while the ring smaller than the said diameter to the opposite compression element side, respectively. CONSTITUTION:An outer diameter of an upper end ring at the opposite compression element 22 side is formed to be smaller than that of a rotor yoke 26 while an outer diameter of a lower end ring 40 is formed to be larger than that of the rotor core yoke 26, respectively. As a result, if each of balancers 39 and 42 solidly formed in each of end rings 40 and 43 of a rotor 24 is made equal in height in a stacking thick direction, weight of the lower balancer 39 becomes heavier than the upper balancer 42. Therefore, the lower balancer 39 so far required to be heavier than the upper balancer 42 is made balanceable in unbalanced force in the rotary compression element 22 without attaching a heavy metal of a separate member large in specific gravity than die casting material. |
