Rotor valve structure for improving pneumatic stability

The invention relates to a rotor valve structure for improving pneumatic stability, and belongs to the field of gas chromatograph analytical instruments. Comprising a stator, a rotor, a transmission assembly and an elastic pressing assembly. Wherein the stator is of a hollow columnar structure; the rotor is coaxially mounted in an inner cavity of the stator; openings are formed in the top end and the bottom end of the stator; the elastic pressing assembly vertically extends downwards from the opening in the top end of the stator and is in contact with the top of the rotor; the transmission assembly vertically extends upwards from an opening in the bottom end of the stator; the rotor extends into the transmission assembly; the external pneumatic element drives the rotor to rotate relative to the stator through the rotating transmission assembly. The stability of a gas path system can be effectively improved, the influence of gas path pressure drop and flow velocity change on the baseline noise level is reduced