I checked now with a fan with known resonance frequency. cooling towers where basin support structure does not obstruct the release of water. trailer <]/Prev 613848/XRefStm 2360>> startxref 0 %%EOF 98 0 obj <>stream 0000170714 00000 n Spare parts for cooling tower Fan blade balancing Restoration of cooling tower Structure repairs Thermal upgrades High-performance, non-fouling fill replacements Draft eliminator replacements Water distribution system upgrades Mechanical component replacements. Metacafe,  0000018740 00000 n Position a ladder under the ceiling fan slightly off center and climb up to reach the first blade. 0000019154 00000 n The fan may have become unbalanced. Use a duster to brush dust off the top and bottom surface of the fan blades. Vornado 143 Tower Air Fan (29 in) #8. Waiting for data... My money is on the rub. Side Balancing Services, Dynamic Balancing of 5 m long Shaft for Cooling Tower & FRP Fan Blades for Cooling Tower Manufacturer offered by Spancrete (india) Private Limited from Navi Mumbai, Maharashtra, India 3.1 Balance. Facebook. Here's the outside and inside. 0000019475 00000 n 0000037421 00000 n A cooling tower is a heat rejection device that rejects waste heat to the atmosphere through the cooling of a water stream to a lower temperature. Are you certain the motor is running 1800 rpm? Do you think it’s that big? Qty. Or closer to 28” ? 0000171682 00000 n Each set is factory tested and balanced to avoid any vibration issues. TaoTronics Tower Fan, 36” Oscillating Tower Fan with Remote, 9 Modes, Large LED Display, 12-Hour Timer, Space-Saving, Portable Floor Bladeless Fan for Bedroom Living Rooms Office, Black (TT-TF002) 4.7 out of 5 stars 9,595 0000019944 00000 n 0000135575 00000 n 0000088765 00000 n 0000019179 00000 n 0000529570 00000 n 0000019865 00000 n Fans serve the function of forcing or driving air throughout the cooling tower. 0000041539 00000 n tighten to ft.lbs. 0000004453 00000 n These blades were adjusted accordingly to conform to the others. 0000002360 00000 n The initial stage might be a bevel and the 2nd stage a helical. 0000002525 00000 n Manufacturer of Cooling Tower Fan Assemblies - Fan Balancing Machines, Fan Blade With Hubs, FRP Blades and Fan Assemblies offered by Northern Cooling Towers (PVT.) 13 86 0000003930 00000 n 0000062974 00000 n 0000013292 00000 n Remember: Using others' images on the web without their permission may be bad manners, or worse, copyright infringement. If you must move the gearbox to correct a bolt bound situation, be sure to check the blade tip clearance. 0000005420 00000 n 0000026339 00000 n 0000004500 00000 n FREE Shipping. 0000107759 00000 n Cooling Tower Parts Depot. Dynamic Balancing Cornell Balancing offers on site service to perform single and two plane balancing service of all rotating equipment. 0000006290 00000 n 0000006993 00000 n Your place to find any and all cooling tower parts. 0000037338 00000 n Any desktop PC with standard case fan mounts will work (80mm, 120mm, 140mm, 200mm—it doesn’t mater as long as they’re consistent). Retighten them as needed. Our restorations services are a huge cost savings over replacement - roughly half the cost of replacement parts. 0000041240 00000 n If the match marking is not followed, the balancing will be disturbed and will lead to high vibrations. 0000013587 00000 n similar to nok, the first thing that came to my mind was a harmonic of belt frequency which I often see on belt driven fans (we don't have cooling tower fans). The spreading is a function of bin-width, window selection, and frequency centering and actually can be mathematically derived (how many db down do we expect 1 bin away, 2 bins away, 3 bins away). 0000011137 00000 n Take measures to rebalance it. A procedure by which the mass distribution of a Rotor is checked and, if necessary, adjusted in order to 0000041215 00000 n 0000036883 00000 n At a gulf coast facility one cooling tower fan experienced elevated vibration levels from the day it was commissioned. Possible causes were unbalance due to dirty or damaged fan blades or a problem with the gearbox mounting structure. 0000013518 00000 n 0000026757 00000 n 0000037269 00000 n (ANSI Standard S2.7 does not define the term “Balance”; refer to 3.17, Unbalance.) 0000013068 00000 n The area where Dave points to a blade rub mark appears to be higher than the tip of the visible blade. All functions can be operated either by the main controls or with the remote included. The pitch of some blades at both B & C fans were found off by a significant amount. Thanks for the quick responses. We Have Marley Gear Reducers, Amarillo Gear Reducers, Cooling Tower Fans, Cooling Tower Valves, and … Because not every fan has a special balancing plane for installation of the correction masses, the test mass is welded to the impeller blades, which in its turn complicates the dismantling. The unique and ideal condition of a Rotor when it has neither static nor dynamic Unbalance. It doesn't make a difference (log. The fan was balanced to 0.5 mils, but there was a high 0.65 in/sec at 1200 cpm. Vimeo,  cooling tower fans found the following: 1) The pitch of all blades on all fans were checked for consistency via a scribe mark on the shroud. 0000062713 00000 n 0000013666 00000 n Various tower components may be rubbing against each other. 0000004184 00000 n 0000005313 00000 n If match marking on blades-hub and coupling hubs are followed: Generally, after balancing, the blades will be match marked with the installing location on the hub and the coupling halves will also be marked similarly. Fan Pitch - The angle that the blades of a propeller fan make with the plane of rotation, measured at a prescribed point on each blade. will the spectrum peak around the suspected frequency? YouTube,  General. •Thru balancing of the cooling tower fan we were able to reduce the 1x rpm fan vibration levels significantly (from 72 mills to 2.5 mills at ~ 330 rpm or from 19 mills to 0.6 mills at ~ 240 rpm). 0000540477 00000 n The 6.875" nozzle is used on towers where the release of the water has to clear obstructions within the tower structure. 0000532343 00000 n Deciding on a cooling approach that matches your case and your components before you go shopping for fans and coolers can be helpful. cover at hub fan serial no. 0000013405 00000 n The fan mount may have loosened. Such a Rotor does not impart any vibratory force or motion to its Bearings as a result of centrifugal forces. Many features may not work properly without it. 0000012904 00000 n And it's a metal frame. The air flow is produced by the fan which is driven by the motor, either in direct drive or by gear (speed reducer). SKU. Where is the 0.65 in/sec at 1200 cpm coming from? MarkL, I don't know where that's coming from. 0000119975 00000 n Supported videos include: 0000019500 00000 n This difference between the weight center and axis of rotation is referred to as “imbalance.” 0000011865 00000 n We also dramatically reduce down time as blades usually do not have to be removed from Shop for oscillating fan with remote at Bed Bath & Beyond. 0000170370 00000 n 0000036288 00000 n This fairly generic pedestal fan is listed at 1854 CFM oh high setting while this popular tower fan is … 0000171719 00000 n 0000108012 00000 n 0000026599 00000 n 3.2 Balancing. 0000135842 00000 n It's pulley-driven with belts, no gear. On a slightly different topic but related, I have heard that viewing a spectrum in log scale can highlight a resonance, what exactly am I looking for ? Fan Deck - Surface enclosing the MIDDLE structure of an induced-draft cooling tower, exclusive of the distribution basins on a crossflow tower. 0000041056 00000 n BALTECH VP-3470 allows placing the correction mass in the direction of rotation … Even if the manufacturer takes care in locating blades and weighing component parts, the weight center is separated from the axis of rotation. We manufacture and supply high quality Cooling Tower Fans, Belts, and Fan Wind Milling Stops. I expect the motor sheave is about 8” diameter, which would require about a 41” fan sheave. 0000547893 00000 n The motor shaft hub mounting might have loosened up. 0000610610 00000 n Dailymotion,  Thanks! 45 m to 10 m dia. Find out more. 0000010504 00000 n 0000040799 00000 n Mils, but there was a high 0.65 in/sec at 1200 cpm from! Might have loosened up structural natural frequency was identified at ~ 310 cpm problem with the remote included allow. 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