Static Blade Adjustable Axial Fan adjustable vanes can be divided into portions and full of static axial fan blade adjustable axial fan two types. They are so quiet through the transfer movement leaves leaf installation angle changes, so that the fan flow, pressure ratio change occurs, reduce static blade mounting angle, you can make the fan characteristic line flow direction shift to small, open big stationary blade mounting angle , to make the fan characteristic line shift to large flow direction. Thus, by changing the mounting angle static leaf blower flow enables wider operating range, performance is improved. Changzhou full vacuum blower with adjustable vanes to improve their lives better than part with adjustable vanes of axial fan performance, but the structure is relatively complex and bulky.

When carrying out theoretical calculations, we made a detailed analysis of the impact the efficiency of the unit after Rotational Vanes on, drawn by the rotational angle of the fan stator blade efficiency operating mode corresponding angle change calculation of the efficiency ratio changes in the same angle change calculation to be smaller some. In the comparative test rig show that: the mounting angle of each column still leaves off a small angle of the same conditions than the flow according to the corresponding stationary blade mounting angle off a small decrease was slightly more, but a lot about reducing the compression ratio, especially in efficiency significantly decline. Rotational Vanes efficiency after part of Shandong vacuum regardless stationary blade installation angle is to reduce or increase the fan running in the new state, can stay productive work, indicating no damage matching between stages.

The fan performance test, we installed low-speed part stator blade angle off a small angle and high speed of static part leaves open the impact installation angle wide-angle traffic were tested. Continue to open a large angle, the less amount of traffic increases, which also proves the mounting angle of the inlet guide vane design smaller the value, the greater the stationary blade installation angle change greater the impact on traffic, the mounting angle of the inlet guide vane design value change the static blade installation angle on flow smaller. Thus, the fan at low speed to reduce the static blade mounting angle increases in high-speed static blade mounting angle, can make the flow of the fan operating range is widened, significantly improved operating performance fan, the fan can meet a wide range of flow changes The blast furnace operating conditions.