頻閃儀測量時如何對風扇進行標記？

蒙那多頻閃儀測量時如何對風扇進行標記？

如圖所示，在 3 個風扇葉片上放置一塊 T-5 反光膠帶。 風扇的速度為 1500 RPM，通過 Pocket-Tach轉速表驗證，將一 (1) 條膠帶貼在中心輪轂上。將蒙那多Nova Strobe 頻閃儀頻率調整為運行速度的 3 倍。 3 x 1500 = 4500 轉。 當您將蒙那多頻閃儀速度提高三倍至 4500 RPM 時，葉片將相互疊加，從正面看時，風扇會顯示“Hi”。 在滑輪、軸、聯(lián)軸器和多葉風扇上試試這個演示。

蒙那多頻閃儀作為診斷檢查燈

當風扇運行時，用頻閃儀從側面照射。 您將能夠檢測到刀片相對于彼此的任何“擺動”或錯位。 狀況良好的風扇應該將三個葉片疊加在一起，看起來像一個葉片。

您可以使用 美國蒙那多頻閃儀（monarch instrument nova strobe portable stroboscopes）檢查彎曲的滑輪、柔性板刀片、松動的螺栓、缺少油脂、裂縫和打滑的皮帶。

左圖：未對準或彎曲葉片的風扇以 1500 轉速運行，頻閃儀調諧至 4500 RPM

右圖：風扇與正確對齊的葉片運行在 1500 和頻閃調整到 4500 RPM

HOW TO MAKE A FAN TALK 

Place a piece of T-5 reflective tape on the 3 fans blades as shown. The speed of the Fan is 1500 RPM as verified with a Pocket-Tach aimed a one (1) piece of tape applied to the Center Hub. Adjust the Nova Strobe Flash rate to 3 time the running speed. 3 x 1500 = 4500 RPM. When you triple the speed to 4500 RPM all the blades will be superimposed on each other and the Fan will read “Hi” when viewed from the front. Try this demo on pulleys , shafts, couplings and multi-bladed fans.

Nova Strobe as a Diagnostic Inspection Light 

As the fan is running view it from the side. You will be able to detect any “wobble” or misalignment of the blades relative to one another. A fan in good condition should have all three blades superimposed appearing as a single blade. 

You can use a Nova Strobe to inspect for bent pulleys, flexplate blades, loose bolts, lack of grease, cracks and slipping belts. 

Fan with misaligned or bent Blades running at 1500 and Strobe tuned to 4500 RPM 

Fan with properly aligned Blades running at 1500 and Strobe tuned to 4500 RPM

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