vibrations on a gearless mill motor

A Gearbox Vibration

gearbox in a fertilizer plant Overall vibrations collected with a periodic predictive maintenance program had shown a sudden and dramatic increase in vibration levels on the gearbox There was a heightened sense of awareness of gearboxes amongst the people in the plant because a similar gearbox had failed without warning a few months earlier...

gearless sag mill slip ring motor

gearless sag mill slip ring motor Spesifikasi Ball Mill Slip Ring heedereu gearless sag mill slip ring motor is the difference between a sag mill and ball mill ยป ball mill and sag 48/5 10K gearless ring motor for sag mill Obrolan Dengan Penjualan Wound Rotor Induction Motor with Liquid Rheostat Sep 18 2011 Hi We operate ball mills with dualcoupled 3500hp 4160v wound rotor induction...

advantages of gearless drives on ball mills

Sep 28 2012 5 Determination of heat distribution in gearless mill drives - Thermal model 44 51 Finite One of the benefits of using this algorithm a foot mounted gearless ball mill and the following will refer to such a mill drive if not Get Price...

The Case for Going Gearless E MJ

The conveyor featuring a belt width of 1 370 mm and a belt speed of 62 m/s can transport more than 5 000 mt of material per hour Its gearless drive system is equipped with two low-speed synchronous motors with cyclo-converters installed power of 38 MW motor speed of 63 rpm rated torque at 576 kNm and a motor cooling system...

geared vs gearless drive solutions for grinding mills

abb raymond mill gear Gearless mill drives the gearless mill drive eliminates ringgear pinion gearbox coupling motor shaft and motor bearings used within a conventional mill drive system by mounting the rotor poles directly onto the mill the mill itself becomes the rotor of the gearless motor building a track record abbs experience in optimizing gearless solutions...

Hammer Mill Motor Vibration at 1x RPM AMP Maintenance Forums

Aug 15 2008 0183 32 Hammer Mill Motor Vibration at 1x RPM 19 repli Hammer Mill Motor Vibration at 1x RPM RM Registered Member We have a Hammer Mill that is exhibiting very high levels of 1x RPM in the axial direction on the motor Overall levels on the motor are very close to 20 in/sec The hammer mill itself is not too bad...

How digitalized gearless drive technology results in

Eleven 5MW gearless drives with synchronous motors running at low speeds 50-60rpm drive three conveyors two with four motors each and one with three Two 20MW conveyors transport the ore from the open pit operation to the surface overcoming an elevation change of around 1 300m while the second conveyor feeds into a slightly smaller 15MW...

ball mill motor powerball mill motor power norway

The SIMINE Gearless mill drives pump system significantly enhances concentrator productivity by eliminating the reducer gear between motor and pump and all corresponding maintenance In addition the cyclone pumps with variable speed can adjust their energy consumption to the optimized flow of pulp resulting in energy savings of up to 30...

Dynamical processes in a multi

A real case study is represented of abrupt failures in a new multi-motor gear drive of vertical rolls in the heavy slabbing mill Modal analysis is conducted and the lowest torsional vibration modes are verified by the data from an industrial plant Conditions of parametric resonances due to variable stiffness of teeth are determined within the range of working speed...

Vibration Damping Pads Anti Vibration Pads Amazon

Antrader Universal Anti-Vibration Pads 4 Pack Rubber Anti-Walk Washer and Dryer Pads Adjustable Height Washing Machine Cushioned Base Blue 50 out of 5 stars 1 Blue 1749 17 49 437/Item Get it as soon as Mon Feb 22 FREE Shipping on orders over 25 shipped by Amazon...

Using Vibration Analysis to Test for Bearing Wear

Triaxial vibration spectra for the motor free end bearing on Chiller 4 The three spectra on the left are low-range data and the three spectra on the right are high-range data The marked peaks in the high-range data represent a 49xM spacing that is a BPFO harmonic seri...

Gearless mill drives

The poles of the gearless or synchronous motor also called wrap-around motor or ring motor are directly installed on the pole flange of the mill shell turning the mill body into the rotor The stator is then wrapped around the mill The gearless motor is fed by a cycloconverter which has a rated output frequency of around 5 Hz for the GMD drive...

Measuring Vibration with Accelerometers

Jul 15 2020 0183 32 Vibration is most commonly measured using a ceramic piezoelectric sensor or accelerometer An accelerometer is a sensor that measures the dynamic acceleration of a physical device as a voltage Accelerometers are full-contact transducers typically mounted directly on high-frequency elements such as rolling-element bearings gearboxes or spinning blad...

Synchronous motor

A synchronous electric motor is an AC motor in which at steady state the rotation of the shaft is synchronized with the frequency of the supply current the rotation period is exactly equal to an integral number of AC cycl Synchronous motors contain multiphase AC electromagnets on the stator of the motor that create a magnetic field which rotates in time with the oscillations of the line...

Gearless Drives

plied gearless drives for two 36-foot ring motors de-veloping a 12 000 kW gearless drive for the Kennecott Utah SAG mill and a 11 200 kW gearless drive for the El Teniente Chile SAG mill In a continued call for larger even more powerful drives Siemens kept pace In 1996 Freeport ordered the first gearless drive for a 38-foot SAG mill...

gearless mill drives Archives

Gearless mill drives GMDs are the grinding solution of choice in challenging environments By eliminating bolt-on mechanical components such as ring-gears pinions couplings and gearboxes GMDs offer ore producers unrivalled availability efficiency and durability while reducing operating expenditure according to GMD provider ABB...

Vibration Analysis of Wind Turbines

Vibration Analysis If you asked the average vibration analyst what type of situations they least like to deal with their checklist might contain 1Variable speed and load from one test to the next 2Variable speed and load during the actual test 3Difficult and limited machine accessibility 4Complex gearboxes - planetary gearboxes being the...

drive motor selection for vibrating screen

Motor Mounting on Vibrating Screens - bulk-online Forums i have seen a lot of pictures of vibrating screens and in many of them i have select the forum that you want to visit from the selection below an electric motor connected by V belts driving an eccentric weight in an orbit...

gearless ball mill india

Gearless mill drives - Grinding ABB in Mining - ABB Group ABB s Gearless mill drive system is the most powerful mill drive system in the market to power...

SIMINE Gearless mill drives

The gearless concept The gearless drive avoids any contact between the rotating mill and the static parts of the motor This allows for contin-uous workflow without maintenance on the gears or the pinions What used to be downtime is now productive time Vibration-free low-weight short-circuit- proof design with high stiffness...

starting current gearless mill drive

Instability in gearless mill drive motors Instability in gearless mill drive motors by peter warner anglo american technical division in anglo platinum ordered two foot ball mills from ffe minerals vecor and two mw gearless mill drives gmds from abb for the kilo tonne per month concentrator for the potgietersrust platinum north expansion project...

Vibration measurement on SAG mill drive motor IEEE DataPort

Vibration measurement on SAG mill drive motor for Energy harvesting or predictive maintenance Vibration measurement on SAG mill drive motor for Energy harvesting or predictive maintenance Vibration measurement on SAG mill drive motor for Energy harvesting or predictive maintenance...

Instability in gearless mill drive motors

speed due to severe vibrations 7 mm and >300 mm/s at some 7 Hz This movement represents 50 of the air gap between Instability in gearless mill drive motors by Peter Warner Anglo American Technical Division...

PDF Transient Torsional Vibrations Control in the Geared

A real case study is represented of abrupt failures in a new multi-motor gear drive of vertical rolls in the heavy slabbing mill Modal analysis is conducted and the lowest torsional vibration...

Design review of Gearless Mill Drives

Comparing this Gearless mill with motor typically used in power generation running at 1500 rpm but at significantly higher power outputs shows that the gearless mill is basically equivalent to a 66 Giga Watt machine running at 1500 rpm The largest motor running at 1500 rpm is currently about 12 Giga Watt The catch is that the Gearless mill...

GENERAL MOTORS CORPORATION VIBRATION

The GENERAL MOTORS CORPORATION VIBRATION STANDARD FOR NEW AND REBUILT MACHINERY AND Table 92A Maximum Allowable Vibration Levels for Gearless Type Spindles 600 to 12 000 RPM...

SIMINE MILL GD

The Gearless Concept The Gearless Drive avoids any contact between the rotating mill and the static parts of the motor This enables a contin-uous workflow without maintenance on the gears or the pinions What used to be downtime is now productive time Vibration-free low-weight short-circuit- proof design with high stiffness...

Dynamical processes in a multi

D YNAMICAL PROCESSES IN A MULTI-MOTOR GEAR DRIVE OF HEAVY SLABBING MILL P AVLO V K ROT ISSN P RINT 1392-8716 ISSN O NLINE 2538-8460 K AUNAS L ITHUANIA 2065 1 Introduction Multi-motor split path power or so-called summatio n drives are used in large-scale machines and rotating aggregates when the technologica l capabilities of equipment manufacturers...

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