Split type axial flow fan

The utility model relates to the field of fans, in particular to a split type axial flow fan. The upper machine shell, the lower machine shell and the impeller section machine shell are connected through the bolts, and it can be guaranteed that a single part of the axial flow fan can pass through most of door openings of a subway station. In order to guarantee that the gap between the machine shell and the impeller is within the range of 0.15%-0.35% of the diameter of the impeller, the matching face of the machine shell and the impeller is fixed to the position of the impeller section machine shell, the impeller section machine shell is of an integral structure and is not made into an up-down subdivision structure, and deformation and enlargement of the impeller section machine shell caused by subdivision are avoided. 本实用新型涉及风机领域，具体涉及一种分体式轴流风机。本实用新型上机壳、下机壳和叶轮段机壳用螺栓连接而成，可保证轴流风机单个部件能通过地铁车站的绝大多数门洞。且为保证机壳与叶轮的间隙在叶轮直径的0.15%~0.35%范围内，将机壳与叶轮的配合面定在叶轮段机壳处，叶轮段机壳为整体结构，不做成上下剖分结构，避免因剖分造成叶轮段机壳变形加大。