闭风器又名星型卸料器, 卸灰阀, 关风机,旋转给料器,通常闭风器的结构是由带有数片叶片的转子叶轮,壳体,密封件及 减速器, 电动机等组成.进出口法兰的为A型,圆形的为B型.闭风器一般都安装在除尘器灰斗下部，为保证连接处的严密不漏风，上部应经常保持（储存）一定高度的粉尘。下面为大家介绍一下闭风器的工作原理。

A closed air blower, also known as a star shaped unloader, ash discharge valve, closed fan, and rotary feeder, is usually composed of a rotor impeller with several blades, a shell, seals, reducer, and an electric motor. The inlet and outlet flanges are of type A, while the circular ones are of type B. Closed air blowers are generally installed at the lower part of the dust collector hopper. To ensure a tight connection without air leakage, the upper part should regularly maintain (store) a certain height of dust. Below, we will introduce the working principle of the air shutter.

　　闭风器的工作原理主要基于其内部结构和设计，以叶轮式闭风器为例，其工作原理包括以下几点：

The working principle of a wind shutter is mainly based on its internal structure and design. Taking a impeller wind shutter as an example, its working principle includes the following points:

　　叶轮式闭风器在电机转动时，通过减速降速在通过连接轴传递给主轴，带动旋转叶轮旋转，起到卸料原理。

When the impeller type air shutter rotates, it decelerates and transmits the speed to the main shaft through the connecting shaft, driving the rotating impeller to rotate and playing the unloading principle.

　　锁风是通过阀体中总是保持有充足的余料，靠余量把叶轮和壳体间隙密封起到锁风作用。

Locking the air is achieved by always maintaining sufficient excess material in the valve body, and sealing the gap between the impeller and the casing through the excess to achieve the locking effect.

　　闭风器包括叶轮、叶轮轴、壳体等部分，其中壳体的内径从左至右逐渐减小，叶片的高度从左至右逐渐减小，以实现物料的顺利输送和气流的阻挡。

The air shutter includes impeller, impeller shaft, shell and other parts, where the inner diameter of the shell gradually decreases from left to right, and the height of the blades gradually decreases from left to right to achieve smooth material transportation and airflow obstruction.

　　闭风器的工作还涉及到与卸尘阀的电动机建立连锁，以保持一定高度的灰柱，防止卸空。

The work of the air shutter also involves establishing a chain with the electric motor of the dust discharge valve to maintain a certain height of the ash column and prevent emptying.

　　此外，闭风器的设计还包括压力平衡结构，当室内外气压发生变化时，通过特殊的通道和隔板进行压力平衡，避免气流突然流动和噪音产生。这种设计确保了闭风器能够高效地对室内外气压差进行平衡，从而达到防止噪音和抽风现象的目的。

In addition, the design of the air shutter also includes a pressure balancing structure. When there is a change in indoor and outdoor air pressure, special channels and partitions are used for pressure balancing to avoid sudden airflow and noise generation. This design ensures that the air shutter can efficiently balance the indoor and outdoor air pressure difference, thereby achieving the goal of preventing noise and exhaust phenomena.

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