Scroll-type hydraulic machine.

摘要

A scroll-type compressor including stationary and orbiting scrolls (1, 2) housed in a shell (9). A first frame (6), also housed in the shell (9), receives a portion of the orbiting scroll (2). The stationary scroll (1) is fixed to the first frame (6), and a second frame (7) is further mounted in the shell (9). A balancer chamber (705) is formed between the first and second frames (6, 7). A main shaft (4) having a balancer (402) is housed in the balancer chamber (705) rotatably. The main shaft (4) includes an enlarged diameter portion (408) adjacent the orbiting scroll (2) and a small diameter portion (409) disposed away from the orbiting scroll (2) and extends between the first frame (6) and the second frame (7) for driving the orbiting scroll (2). A first bearing (602) is disposed between the main shaft (4) at a position at the orbiting scroll side of the balancer (402). A second bearing (702) is disposed between the main shaft (4) and the second frame (7) for supporting the main shaft (4) at a position opposite the orbiting scroll side of the balancer (402).