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an elliptical shape. The primary resistance to movement is the strength of the core back iron and the stiffness of the housing around the stator core, which is restraining the core's movement. On 4 pole motors the distance between the nodes is only 45 mechanical degrees, ½ that seen on 2 pole motors,

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. eliminating the axial seal movement that can draw lubricant out of the coupling should misalignment occur. ... 450. close coupled applications including fans. steel and paper mill equipment. ... another and to protect sensitive electrical equipment. the changeover is performed at standstill by engaging the free running hub.) Type G72 ...

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I try to explain about the steam turbine & components and how its work. ... Flow Turbines may be classified according to the direction of steam flow in relation to the turbine wheel or drum - Axial. - Radial. - Mixed - Tangential Or Helical. ... Flexible couplings Where axial shaft movement is required a flexible coupling is employed and these ...

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Gear couplings can be modified to allow shaft growth in the axial direction or to limit movement in the axial direction. Limiting the movement calls for a plate and possibly a button to be inserted between the coupling …

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Normal water level and flow in bottom seal UNIT III (Maintenance Planning, Practice & Inspection -MECHANICAL SYSTEMS) PA, ID & FD fan check for inlet dampers, bearing alignment, vibration both radial and axial shift of magnetic centre of motor and rotor, fan blade conditions mode of repairs, hard facing, Checking of boiler mountings and ...

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misalignment, permit axial shaft movement and provide ... the coupling was subjected to repeated high loads that caused grid failures of every rung near the gap. This ... velocity produce forces that result in grid loop end and radial outer grid edge wear. Measurable grid end wear is an

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Coal is conveyed (14) from an external stack and ground to a very fine powder by large metal spheres in the pulverized fuel mill (16). 2. There it is mixed with preheated air (24) driven by the forced draught fan …

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Coal Fired Power Plant Pulverizer Gear Coupling Failure The Challenge. ... Gear couplings allow for axial movement of the shafts, which increases the wear on the gears, sleeve bearings and other components. ... and inspections of the disc coupling's flexible elements was now possible using a simple strobe light and while the coal pulverizer ...

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HIGH FREQUENCY AXIAL SLIDING: For Type GL couplings; if axial movement occurs more than 5 times per hour, add .25 to the service factor. kW x 9549 x (S.F. + .25) rpm 4. SHEAR PIN COUPLINGS: When selecting Type GR couplings, make certain that the required shear torque is within the minimum/maximum range for the coupling size selected.

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Radial Blading. Radial-bladed fans run at a lower speed in comparison with the backward-bladed fans, which makes them preferred for high dust loading in gases. ... Axial Fans. High efficiency and self-limiting characteristics are the advantages of the axial-flow fans, as can be seen in Figure 8.11. ... blades and casing, if chosen, worsen the ...

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Axial and Radial fan. Axial fan can provide large flow at low head. Ex. FD fan, Ignitor fan, ID Fan, etc Radial Fan can provide less quantity at high pressure. ... ID Fan, etc Radial Fan can provide less quantity at high pressure. PA fan, Flame scanner cooling air fan, etc. Posted by VIDEO BUFF CUTS at 04:34 No comments ... Loss of coal Mill ...

Steam Turbine Rotor Vibration Failures: Causes and Solutions

During maintenance, if rubbing is observed at the end or intermediate sealing of the rotor or eccentricity of couplings, it is necessary to realign the driveline to avoid high turbine vibration ...