Multistage gas compressor's crank mechanism

The utility model provides a multistage gas compressor's crank mechanism, sets up in multistage gas compressor's crankcase, including bent axle and drive mechanism, drive mechanism includes link mechanism, link mechanism's one end and crankshaft drive hookup, and link mechanism's the other end couples with the piston drive in the compression cylinder, its characterized in that, one side of bent axle is equipped with a crank throw, link mechanism transmission hookup is on this crank throw, one side of the relative crank throw of bent axle still is equipped with a balancing piece, the balancing piece is decentered install on the bent axle and eccentricity direction with the eccentricity direction of crank throw is opposite, and the off -centre the when balancing piece is used for balanced bent axle to rotate is done all can. The utility model provides an among the multistage gas compressor crank mechanism wearing and tearing more serious, problem that life is short. 种多级气体压缩机的曲轴机构，设置在多级气体压缩机的曲轴箱内，包括曲轴和传动机构，所述传动机