Pneumatic liquid on-line automatic balancer of rotor

A pneumatic liquid on-line automatic balancer of a rotor, comprising a sealed balancing disk (1) rotating with a balanced rotor about a central axis and a pressure transfer device (9) mated with the sealed balancing disk (1), wherein at least two pairs of centrosymmetric chambers (31, 32, 33, 34) filled with appropriate balancing liquid are evenly distributed in the sealed balancing disk, the pressure transfer device controls compressed gas in and out of a chamber and makes the balancing liquid controllably flow in each pair of the chambers to achieve dynamic balance of the rotor, a communicating channel of the balancing liquid is provided between outer edges of each pair of the chambers, a quantity of the communicating channel of the balancing liquid is one, a center of the communicating channel of the balancing liquid is communicated with a balancing channel pointed to a center of rotation, the balancing channel is communicated with an end of an emptying channel axially located near the center of rotation, and the other end of the emptying channel is opened to atmosphere;

• wherein, the chambers in the sealed balancing disk (1) are two pairs, the first and the third chambers (31, 33) are formed into one pair in which the communicating channel of the balancing liquid is a first communicating tube (41), and the second and the fourth chambers (32, 34) are formed into one pair in which the communicating channel of the balancing liquid is a second communicating tube (42), the balancing channels are respectively a first and a second balancing tubes (51, 52) and emptying channels are respectively a first and a second emptying tubes (61, 62).