HVAC Service Call: Belt Driven Centrifugal Exhaust Fan Not Working (Broken Pillow Block Bearings) скачать в хорошем качестве

HVAC Service Call: Belt Driven Centrifugal Exhaust Fan Not Working (Broken Pillow Block Bearings)

HVAC Service Call: Belt Driven Centrifugal Exhaust Fan Not Working (Broken Pillow Block Bearings) =============================================== Fluke 902 FC HVAC True-RMS Clamp Meter https://amzn.to/3CXhvsH ABN 3-Jaw Gear Puller Set – 3in, 4in, and 6in https://amzn.to/3niEhn5 Fan Blade/Wheel Puller https://amzn.to/3dNDV52 VETO PRO PAC TECH-MCT Tool Bag https://amzn.to/3iPxdwD Milwaukee M12 12V Cordless Lithium-Ion LED Stick Light https://amzn.to/3aGYSMc​ M12 FUEL 3" Compact Cut Off Tool https://amzn.to/3BiTESq Milwaukee M12 XC6.0 Extended Capacity Battery Pack https://amzn.to/39SudMw​ Milwaukee Cut 1 Dipped GLOVES L https://amzn.to/3s8H18O​ DEWALT Angle Grinder Tool, 4-1/2-Inch, 11-Amp (DWE402) https://amzn.to/2Sk1TMW Klein Tools JTH610E T Handle Hex Key Set (SAE) https://amzn.to/3njv5yM​ Klein Tools JTH68MB Hex Key Kit (METRIC) https://amzn.to/3sNfJnE =============================================== (CAMERA USED IN THIS VIDEO BELOW) GoPro HERO8 Black Waterproof Action Camera https://amzn.to/3aCDw2x​ GoPro Head Strap with QuickClip https://amzn.to/3cNQAVu​ =============================================== Thanks for watching! Email: JumperManTech@Gmail.com Follow me on Instagram! @JumpRmantech =============================================== A centrifugal fan is a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid. Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink; such a fan is also called a blower, blower fan, biscuit blower[citation needed], or squirrel-cage fan (because it looks like a hamster wheel). These fans increase the speed and volume of an air stream with the rotating impellers. Centrifugal fans use the kinetic energy of the impellers to increase the volume of the air stream, which in turn moves against the resistance caused by ducts, dampers and other components. Centrifugal fans displace air radially, changing the direction (typically by 90°) of the airflow. They are sturdy, quiet, reliable, and capable of operating over a wide range of conditions. Centrifugal fans are constant-displacement or constant-volume devices, meaning that, at a constant fan speed, a centrifugal fan moves a relatively constant volume of air rather than a constant mass. This means that the air velocity in a system is fixed even though the mass flow rate through the fan is not. Centrifugal fans are not positive-displacement devices and centrifugal fans have certain advantages and disadvantages when contrasted with positive-displacement blowers: centrifugal fans are more efficient, whereas positive-displacement blowers may have a lower capital cost. The centrifugal fan has a drum shape composed of a number of fan blades mounted around a hub. As shown in the animated figure, the hub turns on a driveshaft mounted in bearings in the fan housing. The gas enters from the side of the fan wheel, turns 90 degrees and accelerates due to centrifugal force as it flows over the fan blades and exits the fan housing. Each blade type varies in terms of efficiency – in other words, how fast the fan moves air through the duct or system where it’s installed. The most important thing to know is that backward curved blades are the most efficient, whereas forward curved blades are one of the least efficient types of fans. =============================================== A pillow block usually refers to a housing with an included anti-friction bearing, wherein the mounted shaft is in a parallel plane to the mounting surface, and perpendicular to the center line of the mounting holes, as contrasted with various types of flange blocks or flange units. A pillow block may contain a bearing with one of several types of rolling elements, including ball, cylindrical roller, spherical roller, tapered roller, or metallic or synthetic bushing. The type of rolling element defines the type of pillow block. These differ from "plummer blocks" which are bearing housings supplied without any bearings and are usually meant for higher load ratings and a separately installed bearing. Plummer block bearings are designed for more corrosive environments. The fundamental application of both types is the same, which is to mount a bearing safely enabling its outer ring to be stationary while allowing rotation of the inner ring. The housing is bolted to a foundation through the holes in the base. Bearing housings may be either split type or solid type. Split type housings are usually two-piece housings where the cap and base may be detached, while solid are single-piece housings. Various sealing arrangements may be provided to prevent dust and other contaminants from entering the housing. Thus the housing provides a clean environment for the environmentally sensitive bearing to rotate free from contaminants while also retaining lubrication, either oil or grease, hence increasing its performance and duty cycle.