Variable geometry turbine fan-shaped blade grid test piece comprising gear transmission mechanism for controlling rotation angle of adjustable guide vane

The invention aims to provide a variable geometry turbine fan-shaped blade grid test piece comprising a gear transmission mechanism for controlling the rotating angle of an adjustable guide vane, which comprises a test section rim, a test section hub front section, a test section hub rear section, an adjustable guide vane rotating shaft upper half section and an adjustable guide vane rotating shaft lower half section, the adjustable guide vane rotating shaft is assembled in an installation hole of the test section rim, the lower half section of the adjustable guide vane rotating shaft is provided with the lower shaft sleeve, the front section of the test section hub and the rear section of the test section hub are respectively provided with hole grooves for fixing the rotating shaft, and the test vanes are arranged in test section flow channels between the test section rim and the front section of the test section hub and between the test section rim and the rear section of the test section hub. Effective and