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轴流式扇风机的反风可以通过以下三种方法实现:1.扭转叶片角度;2.改变旋转方向;3.采用反风道。但是这三种方法都有着严重缺点,扭转叶片角度所需的时间过长,而即便有能在很短时间内同时扭转叶片角度的装置,却仍不能适用于离心式扇风机。改变旋转方向的反风效率过低(据文献记载和某些企业实测,BY型轴流式扇风机反转反风效率均低于30％),并且由于停止扇风机运转后才能改换,时间较长,同时也不适用于
The anti-wind of the axial flow fan can be achieved by the following three methods: 1. Twist the blade angle; 2. Change the rotation direction; 3. Use the anti-wind duct. However, all three of these methods have serious drawbacks. The time required for twisting the blade angle is too long, and even a device capable of twisting the blade angle in a very short period of time can not be applied to the centrifugal fan. Change the direction of rotation of the wind is too low efficiency (according to the literature and measured by some companies, BY-axial fan reversing anti-wind fan efficiency are less than 30%), and because the stop fan to run after the change, the time Long, but not suitable at the same time