vibrations on a gearless mill motor

Dynamical processes in a multi-motor gear drive of heavy ...

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 …

Extracting potential - ABB

found in a conventional mill drive system, such as the ring-gear, pinion, gearbox, coupling, motor shaft and motor bearings. In ABB GMDs, the rotor poles are mounted directly onto the mill, which effectively becomes the rotor of the gearless motor. The motor is fed by a fuse-less cyclo-converter connected

High Voltage Motors | Siemens Electric Motors SIMOTICS ...

Aug 10, 2021· We even supply SIMOTICS HV motors for use in temperatures as low as -55° C and for applications with rigorous vibration quality requirements in line with the API standard. With its compact, modular, high-power, specialized and ANEMA series, SIMOTICS HV is the perfect fit for every large drive application in the medium voltage range.

BALL MILL GEARBOX PROBLEM - Vibration

GEARBOX (Between Motor & Ball Mill) NB FTF BSF 2X BSF BPFO BPFI INPUT BRGS, SKF#22330 15 491 3,192 6,384 7,358 10,507 OUTPUT BRGS, SKF#22240 19 97 783 1,566 1,848 2,446 ... • The presence and absence of vibration at the ball mill gear-mesh frequency and multiples explain most of this difference between loaded & unloaded levels. 0 0.5 1 1.5 2 ...

Gearless Elevator Motor, Hoisting Machine, Elevator Geared ...

Elevator Component (Total 39 Products) Product categories of Elevator Component, we are specialized manufacturers from China, Gearless Motor, Elevator Gearless Motor suppliers/factory, wholesale high-quality products of Gearless Elevator Motor R & D and manufacturing, we have the perfect after-sales service and technical support.

Motor Power Requirements By Ball Mill

Motor Power Requirements By Ball Mill. Ball Mill Motor Power The following equation is used to determine the power that wet grinding overflow ball mills should draw For mills larger than 33 meters 10 feet diameter inside liners the top size of the balls used affects the power drawn by the mill This is called the ball size factor S Rod and Ball Mills by CA Rowland and DM Kjos AllisChalmers

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

Vibration limits on motors - Electric motors & generators ...

Oct 01, 2007· At low frequency (below about 1000cpm), displacement is more suitable to judging severity than velocity. NEMA MG-1 limits for vibration on new motors shop tested on a rigid base: displacement 2 mils pk/pk (Limiting below ~ 1000 cpm) velocity 0.12 ips pk/0 (limiting ~1000cpm - 24000cpm) acceleratio 0.8 g's pk/0 (limiting >24,000 cpm)

Sag Mill Syncronis Motor high axial vibration non drive ...

Nov 01, 2014· Sag Mill Syncronis Motor high axial vibration non drive end bearing Robbie59 (Mining) (OP) 1 Nov 14 09:17. On site we have a Sag Mill Driven by a 5500KW Motor. We have a vibration issue right across the Mill. The highest vibration is 30mm/sec RMS axial on the motor non drive end bearing.(White metal Bearing)

(PDF) Transient Torsional Vibrations Control in the Geared ...

However, these methods are applicable for only two masses gearless drive systems (motor and rolls) and are not quite suitable for parallel electrical drives control in slabbing mill ...

Vibration Analysis & Vibration Monitoring | Dynapar

Vibration data can reveal when equipment has broken welds or bolts, whether the rotor bars in a motor are intact, if the air gap between rotor and stator in the motor is non-concentric, etc. Vibration data can alert maintenance teams to structural or rotating looseness or the presence of resonance.

Cooling Tower - EMF Motor - gearless geared motor

EMF Motor presents the world's most efficient torque motor with patented PM technology wich offers perfect solutions for cooling tower application. Our patented motor technology enables us to produce gearless, high pole number (66-88-110) and very efficienct motors. It offers reliable speed control, reduced maintenance, quieter operation and unbeatable high energy saving.

Low-speed Gearless Converter Drive - 911 Metallurgist

Apr 06, 2019· In the case of the gearless drives so far installed in cement factories, the mill and motor were in most cases combined to form a unit. With most of these installations, the motor is "wrapped around" the mill, a method which affords the following advantages: The overall length of the installation, and thus the building costs are reduced

Gearless conveyor drives (GCD) for medium power | ABB ...

ABB's innovation, the gearless conveyor drive (GCD) for medium power is based on permanent magnet motor (PMM) technology. Rated from 1 to 3 MW motor power, it removes the need for a gearbox, thereby lowering maintenance costs while improving overall reliability leading to greater uptime.

Sentinel: Siemens Gearless Mill Drives - YouTube

Jan 19, 2016· The mills at Sentinel in Zambia are amongst the world's biggest, with 2 off 40 ft SAG mills complete with 28 MW drives, and 2 off 28 foot-ball mills with 22 ...

Vibrations On Tube Ball Mill Pinion Gear Bearings

Vibrations on tube ball mill pinion gear bearings. coal mill ring gear pinion vibration amo-plastbiz, in a coal hammer mill vibrations on tube ball mill pinion gear bearings a gearless mill motor,plantscoal mill ring gear pinion vibration grinding mill . Gears And Pinion For Ball Mill …

Siemens expands mining portfolio to include gearless drive ...

Aug 28, 2010· The 42-foot ring motor is the centerpiece of the gearless drive and wrapped around the tube mill. An increase in tube diameter means that the mass of the ore being ground rises dramatically, and hence also the strain on structural elements and the motor. ... vibrations or material fatigue. In this way it is possible to ensure even at the design ...

M&C installs motors at Cobre Panamá - Mining Magazine

Jan 15, 2018· M&C installs motors at Cobre Panamá. Marthinusen & Coutts, a division of Actom, recently executed the sub-assembly of six gearless mill drives for Minera Panamá's remotely situated Cobre Panamá project in record time. The Marthinusen & Coutts team that successfully executed the sub-assembly of the six gearless mill drives.

Literature Review: Gearless Motor Failures – A Mill ...

Sep 10, 2014· No mill or motor vendor, mill design company or independent consultant can truthfully claim this advantage. So let's look at the observations in Svalbonas' paper on gearless drives in [1]. The structural design of mills is much simpler than the structural design of ring motors. Most of the complexity in a mill is related to bearing design.

like taking pole sag mill abb engine

— Leading the gearless mill drive evolution The ABB gearless mill drive (GMD) is the most powerful get price. Motor Vibration Analysis Keeping it Simple EC&M. Take the correct direction of measurement. You should take housing vibration measurements in three planes (vertical, horizontal, and axial) on both bearing housings, as shown in the ...

Go gearless with ABB's mill and conveyor drives for more ...

May 25, 2021· ABB's state-of-the-art gearless mill drives (GMD) and gearless conveyor drives (GCD) have already become differentiators when combined with advanced digital services. These two technologies have become an ideal and futureproof solution for our industrial customers. We delivered the world's first gearless mill drive to Lafarge Cement in ...

Hot rolling mill drive train dynamics: torsional vibration ...

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 ...

Gearless mill drives - Grinding | ABB

Our GMD eliminates all mechanical components of a conventional mill drive system, such as ring-gear, pinion, gearbox, coupling, motor shaft and motor bearings: By mounting the rotor poles directly onto the mill, the mill itself becomes the rotor of the gearless motor.

The Siemens 42ft gearless mill drive, still an ...

• Motor behavior during normal operation with a loaded mill The result is the design of a Gearless Mill Drive motor for a 42ft Grinding Mill providing up to 35MW of power. Evolution is still the main GMD design philosophy, but realistic and proven computer models help to look beyond experience, where testing is impossible.

VSM Rotor pole shortcircuit gear teeth monitoring mining

A 15 MW gearless ball mill, with an internal stator core of 11.1m; and a gear ball mill, weighing approximately 54.000 kg and with a crown diameter of 6.7m. Figure 1. GEARLESS BALL MILL The measuring chains installed on the gearless ball mill are for the monitoring of air gap, end-winding vibration,

Gearless Drives for Ore Conveying and Grinding - Cmms ...

Siemens, the company that introduced Gearless Mill Drives (GMD) to mining industry started up its first GMD on a ball mill in Norway in 1980. The mill and its drive system are still in service. Today, GMDs are mainly used for SAG mills between 36 and 40 feet (10.7 to …

Anti-Vibration Adaptor For Milling With Long Overhangs ...

Aug 16, 2006· The new DD200 DirectDrive Rotary system from Hardinge Inc. () is a gearless high-speed, high-torque model with precision positioning and repeatability.The company said these features make it well suited for parts that require accurate angular positioning, as well as for high-speed, high-accuracy contouring applications.

Dynamical processes in a multi-motor gear drive of heavy ...

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.