Gearless mill drives are a well established solution for grinding applications in the minerals and mining industries. The paper describes the functionality and technical features of such...
[randpic] push button operation on gearless mill drives and . push button operation on gearless mill drives and motors . push button operation on gearless mill drives and motors [ 47 5867 Ratings ] The Gulin product line, consisting of more than 30 machines, sets the standard for our industry We plan to help you meet your needs with our …
push button operation on gearless mill drives and motors. ... Chain Drive: Motor: 5/7.5 KW x 4 P1 / 140: Speed: 3.5 m / Min: Drive: Geared Motor With Brake: Electric Power: Main - AC 415V, 3 PH, 50 Hz, Lighting - AC 220V, 1 PH, 50 Hz: Operation: Push Button Type: Control System: PLC: Safety devices - Emergency stop switch on operation panel ...
Technologies for extraction and processing, including gearless mill drives (GMDs) and gearless conveyor drives (GCDs), help operators save energy and achieve greater …
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 …
between the motor speed and frequency, as determined by the number of motor poles, is correct. This is one of the most important concepts when programming a variable-frequency drive, but is generally not familiar with most mechanics prior to first installation. For example, a 97-rpm, 16-pole PM gearless motor will have a rated frequency of
World's largest geared drive – 2x8500kW – Wushan, China (operating) Among the many reasons that geared drives on large SAG mills are not favoured, is due to not having an efficient variable speed drive option (60 to 80% critical speed), which …
The gearless conveyor drive (GCD) system eliminates the gearbox from the drive and is one of the most energy efficient means of transportation for bulk material. It uses electric energy and allows almost …
Gearless drives are preferable here. Gearless drives using the principle converters (Fig. 7.7) or dc link converters may also be used. As the price of thyristors is becoming less, these thyristorized drives are becoming very popular. Kiln Drives: The rotary kiln drives depend upon the type of Cement Mill Process (wet or dry).
Abstract— Mining operations are facing the challenge of competitiveness because of low metal prices and operating ... Fig. 1, General scheme of a Gearless Mill Motor drive [24].
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. ... A motor in ongoing operation, for example, was caused to vibrate with the aid of a ...
between the motor speed and frequency, as determined by the number of motor poles, is correct. This is one of the most important concepts when programming a variable …
Our input includes twin 5.5 MW gearless drives operating at a design tonnage of almost 11,000 t/h as well as the e-house with MV and LV power distribution plus a cooling system for the motors and e-house. The automation of the conveyor system will use our process control system Simatic PCS-7.
Electric Motors The standard inching drive motor is a NEMA or IEC frame typically foot mounted to a motor scoop or base plate. Typical motor speeds are either 4 or 6 pole, …
The stator of the gearless motor is then wrapped around the mill. With this innovative concept the gearless mill drive eliminates all critical mechanical components inherent within a conventional mill drive system, such as ring gear, pinion, gearbox, coupling or air clutch, motor shaft and motor bearings.
Gearless conveyor drives - Crushing and conveying | ABB Gearless conveyor drives Do more with less - go gearless Mine operators are challenged with moving more material on conveyors that may cover distances in the tens of kilometers and ascend steep gradients.
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 …
A couple of standard drive options are available for controlling the speed of a grinding mill, the gearless mill drive (wrap-around motor) with cycloconverter drive, and the...
With successful operation of 2 x 6.5MW (Phu Kham, Laos) and three 2 x 7MW units under manufacture (Pascu Lama) and a further 40 projects worldwide, energy efficient Hyper Synchronous SER drives are now mature and ready for use on 2 X 10MW dual drive mills. Speed variation required is in the range of +/- 15% of synchronous motor speeds.
All-in-one unit with drive, encoder, motor and screw; Quiet, high efficiency operation. ... Gearless motion solution; Up to 6Nm torque output; ... No external control panel required; Direction and motion control inputs; …
Siemens
mill and gearless mill with a ringmo-tor are shown in Figs. 1 and 2. Early SAG mill designs using gear drives were limited in the amount of power that could be applied to the pin-ions, 3.7 MPa (5000 hp). The exception to this design was the Hibbing taconite operation. It used two4.47 MPa (6000 hp) motors to drive a 1I-m-diam x 4.5-m long (36-ft ...
With this innovative concept the gearless mill drive eliminates all critical mechanical components inherent within a conventional mill drive system, such as ring gear, pinion, …
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 …
Less Equipment with Gearless Conveyor Drives Conventional Drive Configuration Tail: 0 kW Head: 2 x 2500 kW New Drive Configuration Tail: 0 kW Head: 1 x 5000 kW New Drive Configuration allows a component reduction of 50%, means only one:
The gearless conveyor drive (GCD) system eliminates the gearbox from the drive and is one of the most energy efficient means of transportation for bulk material. It uses electric energy and allows almost …
Traditional ring-geared mill drives have a ring-shaped gear that encircles the mill and drives it through one or two pinions followed by conventional motors. GMDs mount rotor poles directly to the mill body and surround it with …
The new gearless solution was installed on a high capacity (15,000t/h) discharge conveyor of a bucket chain excavator in parallel with the existing geared drive. Both drives connect to the same pulley shaft to allow for exact benchmarking. The gearless solution has performed better in regard to dynamic accuracy and overall efficiency than …
Many Siemens Mill Drives have been in operation over decades. While motors easily achieve this lifetime, the situation with electronic controls can be different: Rapid advancements in electronics and computer technologies have allowed significant progress in the control technology of mill drive systems. Nearly all electronic systems
rated mill speed into the speed of the motor, ω ratedasHz, which for a Gearless Mill Drive is simply ⌽ RPM ÷ 60. For a gear driven mill, the motor speed is a function of the mill …
Maintenance of "Gearless Drive" Mill The lubrication system. This depended on gravity feed of oil to the bearing pads. There has been no mechanical trouble due to this. This system is being revised for better …
It enables gear driven mill power all the way up to 32 MW, territory that could previously only be filled with a gearless drive. This is because it is a quad, not a standard dual pinion solution. In the mining industry there are no installations yet, but the fundamental open gear design philosophy is unchanged from that of a dual pinion drive.
ABB continuously extends technical and performance frontiers of ring-geared mill drive (RMD) technology to fit your site requirements. We provide optimized mill drive solutions for all types of ring-geared mills: low and high speed, single and dual pinion, with and without a gearbox — all designed for reliable, long life and low maintenance ...
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.
A modernization concept for a gearless mill drive that retains most of the existing electrical equipment Solution: • PLC system upgrade from SIMATIC S5 to SIMATIC S7 • Specially manufactured I/O adapters from S5 to S7 I/O boards that obviated the need for rewiring any I/O • Upgrade of HMI from COROS LS-B to SIMATIC PCS7
operation under full production Le Havre GMD was controlled by the last generation of mercury rectifiers Since successfully beginning operation at the end of 1969, this first GMD in the world, operating with a cycloconverter fed synchronous motor, has been followed by much more such drives-firm confirmation that BBC are on the right path
New Drive Configuration Tail: 0 kW Head: 1 x 5000 kW. New Drive Configuration allows a component reduction of 50%, means only one: Driven Motor shaft per pulley Motor, Frequency Converter, Transformer, MV-breaker in case of single drives per pulley or smaller Multidrive system. Max. belt tension might be higher (to be checked …
Grinding mill drives play an important role in the mining industry. Almost 60% of the electrical energy consumed by modern concentrator plants goes to grinding mill drives. Different technologies ...
