Propeller dynamometer for cavitation water drum

The invention discloses a propeller dynamometer for a cavitation bubble water drum. The propeller dynamometer comprises a base, a lifting variable-angle mechanism, a connecting assembly and a detection piece, the base is fixed above the cavitation bubble water cylinder, is connected with an upward working window of the cavitation bubble water cylinder, and is used for supporting the lifting angle changing mechanism and the connecting assembly; the bottom of the lifting angle changing mechanism is connected with the base through a cylindrical sleeve pair, the left and right symmetrical positions of the lifting angle changing mechanism are fixedly connected with one end of the connecting assembly, and the other end of the connecting assembly penetrates through the base, enters the cavitation bubble water cylinder and is fixedly connected with the detection piece; the lifting variable-angle mechanism is used for driving the connecting assembly and changing the posture of the detection piece through transmission