No_4—6．3主要由叶轮、机壳、进风口、支架等组成；N07．1—16主要由叶轮、机壳、进风口、传动组等组成。
叶轮：9—19型风机叶片为12片，9—26型风机叶片为16片。均属前向弯曲叶型。叶轮扩压器外缘**高圆周速度不超过140m／s。叶轮成型后
经静、动平衡校正，故运转平稳。
机壳：用普通钢板焊接成蜗型壳整体。
进风口：做成收敛式流线型的整体结构，用螺栓固定在前盖板组成。
传动组：由主轴、轴承箱、联轴器等组成。主轴由优质钢制成，轴承箱整体结构，采用滚动轴承，用轴承润滑脂润滑。
Fan of N_04—6 3 is mainly consists of impeller,enclosure，air inlet，suppod，etc．；fan of N_07 1—16 is mainly consists of impeller，enclosure，
air inlet，driving unit，etc．．
Impeller：fan Of 9—1 9 type has 1 2 impellers．9-26 type has 1 6 impellers．all are forward direction bending types Outer edge of impeller diffuser not over 1 40m／s．The impellers have accepted static and dynamic balance calibration，SO they are able to run smoothly and stably．
Enclosure：it is made of general steel sheets by welding，it is a scroll casing．
Air inlet：it is made into an integral structure with convergence streamline，it is fixed by bolt on the front plate
Driving unit：it is consists of principal shaft，bearing housing，coupling，etc．．The principal shaft is made of high—quality steel，bearing housing has integral structure，adopting rolling bearing and bearing grease for lubrication．