旋转供料器的正确选型是确保气力输送系统有效运转的关键。选型应从广义和狭义两个层面进行考量。广义选型是指旋转供料器结构形式的选择，需根据物料的性质（包括名称、堆积密度、粒径、粘附性等）、输送量以及作用在旋转供料器上的操作压力来决定。物料的堆积密度对选型影响显著——当物料充气后堆积密度大幅减小时，要求供料器的容积要大得多才能通过同样重量的物料。狭义选型则是指具体型号性能规格的确定。

The correct selection of rotary feeders is the key to ensuring the effective operation of pneumatic conveying systems. Selection should be considered from both broad and narrow perspectives. Generalized selection refers to the selection of the structural form of the rotary feeder, which needs to be determined based on the properties of the material (including name, bulk density, particle size, adhesion, etc.), conveying capacity, and operating pressure acting on the rotary feeder. The bulk density of materials has a significant impact on selection - when the bulk density of materials decreases significantly after inflation, the volume of the feeder is required to be much larger to pass the same weight of materials. Narrowly defined selection refers to the determination of specific model performance specifications.

在输送量计算方面，旋转供料器的理论输送量可按以下公式计算：理论输送量（m?/h）= 转子容积（L/r）× 转子转速（rpm）× 填充系数。转子转速一般控制在10-25r/min范围内。在低转速时，旋转供料器的排出量与转子转速成线性正比关系；当转速超过一定限度后，物料排出量反而会下降，这主要是因为叶轮转速过快时物料来不及充分填充格室。因此，在选配过程中应注意：旋转供料器供料目标产能应略大于实际产能；转速不宜过高，一般控制在30-50r/min以内。若作为系统选型，还需确定输送距离等系统参数。

In terms of conveying capacity calculation, the theoretical conveying capacity of the rotary feeder can be calculated according to the following formula: theoretical conveying capacity (m?/h)=rotor volume (L/r) × rotor speed (rpm) × filling coefficient. The rotor speed is generally controlled within the range of 10-25r/min. At low speeds, the discharge volume of the rotary feeder is linearly proportional to the rotor speed; When the speed exceeds a certain limit, the amount of material discharged will actually decrease, mainly because when the impeller speed is too fast, the material cannot fully fill the compartment. Therefore, during the selection process, it should be noted that the target production capacity of the rotary feeder should be slightly greater than the actual production capacity; The speed should not be too high, generally controlled within 30-50r/min. If used as a system selection, it is also necessary to determine system parameters such as conveying distance.

在维护管理方面，旋转供料器的密封性能是需要核心关注的内容。其密封结构多样，包括采用带副唇旋转油封和特殊填料密封结构。运行中应定期检查转子与机壳之间的间隙是否正常，密封件是否老化或磨损，驱动装置是否运转平稳。若用于输送磨损性较强的物料，应选用耐磨型转子或加装耐磨衬套。对于输送粘附性物料的场合，需注意清理叶片和壳体内壁的积料，防止堵塞。旋转供料器的选择是否合适，直接影响气力输送系统是否能够有效运转，因此在系统设计和设备采购中应给予充分重视。

In terms of maintenance and management, the sealing performance of the rotary feeder is a key concern. Its sealing structure is diverse, including the use of a rotating oil seal with a secondary lip and a special packing sealing structure. During operation, it is necessary to regularly check whether the gap between the rotor and the casing is normal, whether the sealing components are aging or worn, and whether the driving device is running smoothly. If used for conveying materials with strong wear resistance, wear-resistant rotors or wear-resistant bushings should be selected. For conveying adhesive materials, attention should be paid to cleaning the accumulated material on the blades and the inner wall of the shell to prevent blockage. The selection of a rotary feeder directly affects the effective operation of the pneumatic conveying system, so it should be given sufficient attention in system design and equipment procurement.

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