蒙那多頻閃儀測量時如何對風(fēng)扇進行標(biāo)記？
如圖所示，在 3 個風(fēng)扇葉片上放置一塊 T-5 反光膠帶。 風(fēng)扇的速度為 1500 RPM，通過 Pocket-Tach轉(zhuǎn)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(diào)整為運行速度的 3 倍。 3 x 1500 = 4500 轉(zhuǎn)。 當(dāng)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(fēng)扇會顯示“Hi”。 在滑輪、軸、聯(lián)軸器和多葉風(fēng)扇上試試這個演示。
蒙那多頻閃儀作為診斷檢查燈
當(dāng)風(fēng)扇運行時，用頻閃儀從側(cè)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(fēng)扇應(yīng)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(zhǔn)或彎曲葉片的風(fēng)扇以 1500 轉(zhuǎn)速運行，頻閃儀調(diào)諧至 4500 RPM
右圖：風(fēng)扇與正確對齊的葉片運行在 1500 和頻閃調(diào)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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