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•Project: Conduct vibration measurements and analysis reports for motors and gear boxes. Lafarge Cement factory (RAK), (UAE) •Project: vibration analysis for the Raw Mill Fan & ID fan – Laser Alignment for the driving Mill-ODS analysis for double shaft motor with two fans and submit report with the findings. Al Arabia Cement Co. (EGYPT)
Installed in 2006, the original Raw Mill fan began to show signs of heavy erosion within the year. High silica dust caused wear on the fan blades adversely affecting the performance of the fan, and as a direct consequence, reducing the plant's output significantly.
Mechanical Solutions, Inc. (MSI) was contracted by a paper mill to solve excessive vibration problems on Induced-Draft and Forced-Draft fans and their respective drive trains. This case history discusses the motor driven FD fan problem and solution.. Figure 1. Freeze frame picture from an ODS animation showing the "Rocking" Motion of the FD fan housing.
(PDF) Vibration Control of a Raw Mill with Fuzzy Logic re vibration vertical roller mill. There are a number of reasons for high vibrations in vertical roller mills, such as: 1. Failure of the grout or cement material under the steel beams embedded in the foundation top, which allows oil to penetrate, further degrading the concrete.
The FD fan had excessive vibration at 14.85 Hz or at about 1x running speed. The ODS (Figure 1) revealed a "rocking" motion of the fan housing from front to back. It appeared that it was pivoting about the back of the housing and the front (suction side) was lifting off the base.
A good routine vibration program using a portable data collector, or permanent on-line vibration monitoring, will become the foundation of any predictive maintenance initiative. Measuring, trending, alarming and analyzing fan and motor vibration will provide earlier warning of developing problems and allow replacement parts to be ordered.
typical problems of vertical raw mill Mine Equipments. typical problems of vertical raw mill Rawmill Wikipedia, the free encyclopedia A rawmill is the equipment used to grind raw materials into "rawmix" during the manufacture of cement. it into clinker, which is then ground to make cement in the cement mill .
Machine vibration can often be intentionally designed and so have a functional purpose. (Not all kinds of machine vibration are undesirable. For example, vibratory feeders, conveyors, hoppers, sieves, surface finishers and compactors are often used in industry.) At other times machine vibration can be unintended and lead to machine damage. Most
issues with high vibration and prevent mill trips. Requirements of VRM operation Safe, reliable and productive use of a mill plant requires consideration of the following: • high production rates in the presence of potential limitations in: – mill table power – mill differential pressure via the mill fan – external recirculation
Jan 17, 2012· VIBRATION MONITORING OF CRITICALEQUIPMENTS OF POWER PLANTS Boiler feed pumps (TDBFP OR MDBFP) Condensate extraction pumps (CEP) Circulating water pumps Induced draft fans (ID Fan) Force draft fans (FD Fan) Primary air fan Raw water pumps Cooling water pumps Mill motors Coal crushers compressors 30.
May 01, 2001· Vibration occurs during fan operation and may have many causes, one of which could be imbalance. Other causes of vibration include mechanical looseness, coupling misalignment, defective bearings, insufficient flatness of bearing mounting surfaces, rotor cracks, driver vibration, and V .
Typical applications where condition monitoring is applicable are kiln drives, separators, crushers, screens, gear boxes, conveyor belts, fans, raw mills, ball mills, elevators and blowers. It is essential to use portable instruments, online systems and accessories of rotating machinery and vibration monitoring equipment for detecting ...
One of the significant risks to the performance and life-cycle of a fan system is vibration of the equipment. The vibration level of a centrifugal fan will determine its mechanical condition. If the vibration is too intense then it can become serious threat to fan operation causing forced shutdown.
rolls). Without measuring the vibration in all three directions, you don't know the exact contribution of the rotating rolls to paper machine vibration. This is why a complete vibration study must be performed. Vibration analysis may be undertaken as a stand-alone process, or may be part of a machine section audit or comprehensive machine analysis.
6.08 Vibration Severity Chart How To Use This Severity Chart 1) 3-in-1 chart plots vibration measure and levels for: Acceleration vs. CPM, Velocity vs. CPM, and Displacement vs. CPM. 2) Knowing a machine's RPM (i.e. CPM) and the vibration sensing technique .
Separator Fan 248300 m 3/h ESP Fan 74100 m 3/h 497 mmwg 375 mmwg 500 kW 110 kW Bag Filter Fan 21720 m 3/h 185 mmwg 19 kW 3.2 Performance The mill is designed to handle a total ball charge of 324.5 t at loading with a percentage filling of 29.5% in both the chambers.
Common Causes of Vibration in Centrifugal Fans. Ever since centrifugal fans have been manufactured they have been subject to vibration related problems. These problems range from simple unbalance conditions caused by mass variations on the fan rotor to much more complex issues related to shaft alignment, bearing fatigue, or resonance issues.
Vibration analysis revealed that once fan No. 2 was turned on, a slight increase in vibration amplitude across all three points of measurement occurred, while fan No. 1 remained the same. Testing showed the highest amplitude appeared in the motor outboard vertical at 0.456 inches per second, with a dominant peak at 841 cycles per minute ...
Vertical roller mill for raw Application p rocess materials (4) This type of mill can crush materials which are too large to be fed into the tube (ball) mill (5) Ground materials are dried by the flue gas from the kiln Fig2 Schematic process flow of vertical roller mill for grinding of raw materials Vertical roller mills are adopted in 20 cement plants (44 mills) in Japanget price
Vibration occurs during fan operation and may have many causes, one of which would be imbalance. Other causes of vibration would include mechanical looseness, coupling misalignment, defective bearings, insufficient flatness of bearing mounting surfaces, rotor cracks, driver vibration and v-belt slippage.
The vibration control of raw material vertical roller mill system News Date:2015-09-14 14:13:26. The vibration of mill body of vertical roller mill is a normal phenomenon exists in working condition, reasonable vibration is allowed, if the mill has a violent vibration, it will cause damage to millstone, roller lining and accessory equipment. . Therefore, vibration values in working condition ...
Raw mill exhaust fans or stack fans are also called as de-dusting fans. In cement industry raw mill exhaust fans handle 2.2 ton of exhaust gases for the production of 1 ton of clinker. Raw mill exhaust fans are operated with very adverse situations because the fan handles mainly gases such as CO2, N2, NOx and Sox along
pumps, compressors, pulp refiners, ball mills, furnaces and piping systems. He has a Master of Science in Solid Mechanics from the University of Calgary, and is a member of the Vibration Institute. ABSTRACT Changes in case vibration readings are used .
• Balancing of fan reduced 1x rpm vibration levels by 80 to 85% with final levels at or very near 1 mills-pk-pk. • Fan was run thru its normal operating speed range after the initial balance @ 675 rpm and even at 900 rpm, its levels were acceptable so no trim balance was necessary.
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