Axial adjusting mechanism, pipeline connecting assembly and water chilling unit

The utility model belongs to the technical field of pipeline compensation, and discloses an axial adjusting mechanism, a pipeline connecting assembly and a water chilling unit. The axial adjusting mechanism comprises a connecting shaft section, a panel and an adjusting piece. The to-be-compensated part can perform axial displacement compensation on the to-be-compensated part through the axial adjusting mechanism, the to-be-compensated part can move in the direction close to or away from the panel by rotating the adjusting part, so that axial displacement compensation is achieved, and the problem that the axial tolerance clearance between pipelines cannot be compensated is solved. The pipeline connecting assembly comprises the axial adjusting mechanism which can axially adjust the tolerance clearance of the part to be compensated so as to meet the installation requirements of different tolerance dimensions. The water chilling unit comprises the pipeline, the to-be-compensated part and the pipeline connecting a