旋转供料器又称星形加料器、旋转阀、锁气器或星型下料器，是气力输送系统中用于均匀、连续供料的关键设备。其核心结构包括带有数个叶片的转子、圆筒形机壳、端盖、密封件以及由电机和减速器组成的驱动装置。转子通常装有6至10个叶片，将机壳内空间分隔为相应数量的格室。物料从上部料斗靠自重落入转子叶片间的空格（格室）中，随着转子在电机驱动下匀速旋转，被携带的物料运动至下部的出料口，依靠重力或系统压力卸出。这一过程实现了物料的连续、定量、均匀输送。

Rotary feeder, also known as star feeder, rotary valve, air lock or star feeder, is a key equipment used for uniform and continuous feeding in pneumatic conveying systems. Its core structure includes a rotor with several blades, a cylindrical casing, end caps, seals, and a driving device composed of a motor and a reducer. The rotor is usually equipped with 6 to 10 blades, dividing the space inside the casing into a corresponding number of compartments. The material falls into the space (compartment) between the rotor blades by its own weight from the upper hopper. As the rotor rotates at a constant speed under the drive of the motor, the carried material moves to the lower discharge port and is discharged by gravity or system pressure. This process achieves continuous, quantitative, and uniform transportation of materials.

旋转供料器具有定量供料和锁气的双重功能。其“锁气”作用体现在：转子与机壳之间的间隙出彩小，能够有效防止系统内外气体的串通，保持气力输送系统的压力稳定。机体侧面常设有均压排气口，可将叶轮回转带来的高压气体从此排走，减少气体顶料现象，有利于物料的顺利下落。根据转子叶片的结构形式，旋转供料器主要分为D型和B型两种：D型叶片两端开放式，适宜输送粉状物料；B型叶片两端封闭式，适宜输送粒状、球状物料。

The rotary feeder has a dual function of quantitative feeding and gas locking. Its "gas locking" function is reflected in the extremely small gap between the rotor and the casing, which can effectively prevent the collusion of gases inside and outside the system, and maintain the pressure stability of the pneumatic conveying system. There is a permanent pressure equalization exhaust port on the side of the body, which can discharge the high-pressure gas brought by the impeller rotation, reduce the phenomenon of gas topping, and facilitate the smooth falling of materials. According to the structural form of the rotor blades, rotary feeders are mainly divided into two types: D-type and B-type: D-type blades with open ends are suitable for conveying powdered materials; The B-type blade is closed at both ends and suitable for conveying granular and spherical materials.

机体壳体也可根据设计分为粉料型、颗粒型、耐磨型和耐压型等不同类型。颗粒型进口处设置V形结构，适用于粒料和弹性颗粒的输送；耐磨型转子设有可补偿的活动叶片或耐磨镶条；耐压型端面采取特殊密封结构，叶轮与机壳间隙出彩小，适用于高压工况。对于高压工况，还可在端盖与转轴之间设计带充气密封口的充气密封圈。旋转供料器体积小、结构简单、运转维修方便，广泛应用于环保、冶金、化工、粮食、水泥、电力等行业的气力输送与除尘系统中。

The body shell can also be divided into different types according to design, such as powder type, particle type, wear-resistant type, and pressure resistant type. V-shaped structure is installed at the inlet of granular material, suitable for conveying granular and elastic particles; The wear-resistant rotor is equipped with compensatory movable blades or wear-resistant inserts; The pressure resistant end face adopts a special sealing structure, and the clearance between the impeller and the casing is extremely small, suitable for high-pressure working conditions. For high-pressure conditions, an inflatable sealing ring with an inflatable sealing port can also be designed between the end cap and the shaft. The rotary feeder has a small volume, simple structure, and easy operation and maintenance, and is widely used in pneumatic conveying and dust removal systems in industries such as environmental protection, metallurgy, chemical industry, grain, cement, and electricity.

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