Large-blade weight moment over-range testing device

The utility model belongs to the field of weight moment testing, and relates to an improvement of a small-range moment scale, comprising a small-range moment scale consisting of an oil damper (1), a sliding weight (2), a force sensor (6), a supporting point (7), a scale beam (13), a switching flange disc (14), a data acquisition unit (8) and a computer (9), and a blade clamp (10). The utility model is characterized in that an auxiliary testing mechanism consists of a second force sensor (3) and a force value display (4); the second force sensor (3) is positioned above or below the blade clamp (10); a force sensing rod (11) of the second force sensor (3) is vertically connected with the blade clamp (10); and a shell of the second force sensor (3) is connected with a base of the small-range moment scale by a connecting rod (12). The utility model can expand the measuring range of the small-range moment scale, solve the measuring difficulty of weight moment of an over-range blade of a certain-type aircraft engin