Self-generating heatmeter

The utility model discloses a self-generating heat meter, comprising a housing. A separator plate and an upper supporting plate which are sealing contacted with the inner wall of the housing are arranged in the housing, water inlet and outlet pipes are communicated with the cavity of the lower part of the separator plate of the housing, an impeller is arranged in the cavity, an impeller shaft is lengthened to make the impeller shaft pass upward through the separator plate, a sealing ring is arranged on the contact surface of the impeller shaft and the separator plate, both ends of the impeller shaft are respectively inserted into the positioning holes which are cut on the bottom face of the housing and the lower end face of the upper supporting plate, an armature type generator rotor which is provided with a sliding ring and brush sheet structure is fixed on the impeller shaft arranged between the separator plate and the upper supporting plate, the magnetic poles of the stator of the generator is fixed on the inner wall of the housing arranged between the separator plate and the upper supporting plate, and the power supply output terminal of the generator is connected with both ends of the battery in the heat meter. The self-generating heat meter uses flowing water as motive power to generate electricity when the self-generating heat meter works, which solves the problem of self power supply of heat meters. The self-generating heat meter decreases the volume of battery and saves energy source, extending battery life.