Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Efficient, integrated vertical mill drive with high performance

16.03.2010
With the Flender EMPP vertical mill drive the Siemens Drive Technologies Division has developed a drive concept that prevents load surges arising from short power supply interruptions and optimizes the transfer of forces between the drive and the mill. At the same time the number of components that may be susceptible to faults is reduced. This in turn increases plant availability, and enables the power range to be expanded to 15 MW.

Vertical mills are used, for example, to crush raw material and cement in the building materials industry or coal in coal preparation. The trend on the vertical mill market is toward larger production facilities.


The EMPP vertical mill enables drive applications involving power ratings from 500 kW to 15 MW to be operated with high plant availability. This is made possible by an integral, permanent-magnet synchronous motor supplied by a frequency converter. The omission of the bevel gear stage and the coupling enables the high forces to be optimally transferred, with the result that less complex components are required, which increases the efficiency of the mechanical system.

The grinding plate can be precisely controlled via the closed-loop speed control of the frequency converter. This means that although different grinding materials are involved, the grinding process becomes more even and can be optimized locally. Load surges resulting from short interruptions in the power supply are avoided by means of the electrical decoupling of the drive system, thus ruling out damage to the mechanical components. Rotary oscillations excited by the grinding process can be actively dampened via the drive. As it is often difficult to transport large components, from a certain size the EMPP drive can be delivered in two parts and assembled on site. The mill drive meets the requirements of the ATEX Directive that is of particular importance for coal mills with flammable coal dust.

The Siemens Industry Sector (Erlangen, Germany) is the worldwide leading supplier of environmentally friendly production, transportation, building and lighting technologies. With integrated automation technologies and comprehensive industry-specific solutions, Siemens increases the productivity, efficiency and flexibility of its customers in the fields of industry and infrastructure. The Sector consists of six divisions: Building Technologies, Drive Technologies, Industry Automation, Industry Solutions, Mobility and Osram. With around 207,000 employees worldwide (September 30), Siemens Industry achieved in fiscal year 2009 total sales of approximately €35 billion.

The Siemens Drive Technologies Division (Nuremberg, Germany) is the world's leading supplier of products and services for production machinery and machine tools. This includes standard products but also encompasses industry-specific control and drive solutions. Integrated technologies along the entire drive train with electrical and mechanical components offer highest potential to reduce energy consumption in industrial plants. The services provided by the Division include mechatronics support in addition to online services for web-based fault management and preventive maintenance. With around 36,000 employees worldwide (September 30), Siemens Drive Technologies achieved total sales of €7.5 billion in fiscal year 2009.

Reference Number: IDT2010032313e

Julia Kauppert | Siemens Industry
Further information:
http://www.siemens.com/flenderempp
http://www.siemens.com/industry
http://www.siemens.com/drivetechnologies

More articles from Machine Engineering:

nachricht Scientists from Hannover develop a novel lightweight production process
27.09.2017 | IPH - Institut für Integrierte Produktion Hannover gGmbH

nachricht PRESTO – Highly Dynamic Powerhouses
15.05.2017 | JULABO GmbH

All articles from Machine Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

3rd Symposium on Driving Simulation

23.10.2017 | Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

 
Latest News

Taming 'wild' electrons in graphene

23.10.2017 | Physics and Astronomy

Mountain glaciers shrinking across the West

23.10.2017 | Earth Sciences

Scientists track ovarian cancers to site of origin: Fallopian tubes

23.10.2017 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>