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mill motor bearings vibration

Vibration Sag Mill Motor NDE Bearing AMP Maintenance Forums

Vibration Sag Mill Motor NDE Bearing. RM Registered Member. At our mine we have an issue with vibration at the Sag Motor NDE bearing. The bearing is a journal white metal bearing. The motor has been running for about 14 months now. The vibration at the NDE bearing was around 2mm/sec. In the last month it has climbed to 4.5mm sec with the

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Vibration Based Condition Monitoring ofRolling Mill

bearing reaction is then responsible for increase in vibration amplitude at respective frequency of a component. It means as bearing reaction increases conversely the amplitude will also increase. 4. ROLLING MILL: A rolling mill 2 of this company uses an 800 HP motor, which is used to transmit the power to the rolling mill.

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I Just Changed My Motor Bearings and They’re Bad Again

Vibration Testing. It started when bearing frequencies on the motor were analyzed. This motor, like several others on this process floor, experienced a bearing defect. Vibration levels on these machines were low and everything, according to ISO vibration standards, seemed fine. Shown below are the spectra and waveform from the defective bearing.

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Motor Vibration Analysis: Keeping it Simple EC&M

More stringent specifications regarding motor vibration call for maximum velocity levels of 0.1 in./sec on the housing and 1.5 mils of displacement vibration on the shaft. The limits apply to a motor mounted on a seismic mass, and uncoupled or coupled to a piece of equipment in a way that eliminates any vibration in the driven equipment.

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Vibration Severity Chart Maintenance

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

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Bearing Handbook for Electric Motors

9. Rotate idle bearings.Bearings installed in equipment that is subject to vibration while the shafts are stationary may incur false brinelling damage, which also occurs when equipment is not properly protected during shipment. It can appear as bright, polished depressions on the inner and/or outer races, as well as on the rolling elements. 10.

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ABB knows the most common bearing diffi culties and how

motor cabling, installation, alignment, bearing currents, temperature and vibration. 2 globalcement MAGAZINE October 2007 N ot all bearings are suitable for every application; a universal, all-purpose bearing does not exist. Th e choice of bearing arrangement is based on the following qualities: • load carrying capacity in the axial and

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Vibration Based Condition Monitoring ofRolling Mill

bearing reaction is then responsible for increase in vibration amplitude at respective frequency of a component. It means as bearing reaction increases conversely the amplitude will also increase. 4. ROLLING MILL: A rolling mill 2 of this company uses an 800 HP motor, which is used to transmit the power to the rolling mill.

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BALL MILL GEARBOX PROBLEM Vibration

the pillow block spherical roller bearings. • As this motor operates on sleeve bearings, it is very doubtful that this vibration originates from the motor. It is much more likely being transmitted to the motor from the ball mill pillow block bearings.

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High Vibration Problem at Raw Mill Motor AMP Maintenance

Dear Analysts, We are facing an issue on our cement plant. It's raw mill main drive motor of 4300kw. On no load condition, vibration is normal but as the feed come, vibration reaches to 4-6 mm/sec (fluctuating between 4 and 6) and whole vibration is on 85Hz (which is natural frequency of end shield bearing housing as told by manufacturer). According to manufacturer, this frequency is being

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Vibration Sag Mill Motor NDE Bearing AMP Maintenance Forums

Vibration Sag Mill Motor NDE Bearing. RM Registered Member. At our mine we have an issue with vibration at the Sag Motor NDE bearing. The bearing is a journal white metal bearing. The motor has been running for about 14 months now. The vibration at the NDE bearing was around 2mm/sec. In the last month it has climbed to 4.5mm sec with the

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Machinery Vibration Limits#8

Changes in case vibration readings are used to monitor rotating machinery condition. Absolute levels of vibration are indications of condition except where structural resonances (e.g.: bearing housings, or motor bases) amplify vibrations at certain frequencies (usually integer multiples of shaft speed).

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Motor Vibration Analysis: Keeping it Simple EC&M

More stringent specifications regarding motor vibration call for maximum velocity levels of 0.1 in./sec on the housing and 1.5 mils of displacement vibration on the shaft. The limits apply to a motor mounted on a seismic mass, and uncoupled or coupled to a piece of equipment in a way that eliminates any vibration in the driven equipment.

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Motor Electrical Fluting.ppt Vibration

Bearing life Bearing examples Protection Methods. Janelle Hammes Electric Motor and Repair, Inc West Columbia, SC Originally from Rockford, IL In the motor business for 2 years . Vibration Description . when you are performing a vibration analysis. Identifying the Problems cont. Here is a good comparison of the good bearing

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Bearing damage and failure analysis SKF

Bearings SKF is the world leader in the design, development and manufacture of high performance rolling bearings, plain bearings, bearing units and housings. Machinery maintenance Condition monitoring technologies and main-tenance services from SKF can help minimize unplanned downtime, improve operational efficiency and reduce maintenance costs.

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Bearing Handbook for Electric Motors

9. Rotate idle bearings.Bearings installed in equipment that is subject to vibration while the shafts are stationary may incur false brinelling damage, which also occurs when equipment is not properly protected during shipment. It can appear as bright, polished depressions on the inner and/or outer races, as well as on the rolling elements. 10.

More

ABB knows the most common bearing diffi culties and how

motor cabling, installation, alignment, bearing currents, temperature and vibration. 2 globalcement MAGAZINE October 2007 N ot all bearings are suitable for every application; a universal, all-purpose bearing does not exist. Th e choice of bearing arrangement is based on the following qualities: • load carrying capacity in the axial and

More

The Role of Vibration Monitoring in Predictive Maintenance

whole gearbox, and replacing a motor bearing is better than having to send the motor to a rewinder to make expensive repairs and replace parts. At the heart of many Predictive Maintenance strategies is Condition Monitoring which detects potential defects in critical components e.g. bearings, gears etc at the early stage thereby

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Vibration Analysis Pinpoints Inadequate Motor Bearing

During the routine scheduled vibration monitoring activity, this electric motor was observed by the condition monitoring operative to be emitting an intermittent high-pitched noise from the nondrive-end (NDE) bearing location, albeit very low in amplitude. Routine overall vibration readings taken throughout the motor exhibited readings below 1

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Vibration Monitoring of Rolling Bearings To Maximise Asset

Jan 01, 2016· Traction high axial load motor DE Type 6016 ball bearing or contamination outer ring showing a number of trapped between the areas of damage to be present on rolling element and the raceway cage pocket. After the bearings were replaced the motor was re-installed on the bogie and the vibration measurements repeated on the wheel lathe.

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An Overview of Bearing Vibration Analysis

most situations bearing vibration cannot be measured directly and so the bearing vibration signature is modified by the machine structure and this situation is further complicated by vibration from other equipment on the machine i.e. electric motors, gears, belts, hydraulics, etc.

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