Robust and mobile

New low-vibration jaw crusher increases performance of crushing plants

Summary: Crushing plants are used in size reduction and material processing around the world. Both in stationary and in mobile either semi-mobile plants, crushers are installed on tall steel structures. These have to withstand not just the static weight loads of the crusher but also dynamic crushing loads and out-of-balance loads. In particular the cyclic out-of-balance loads can lead to fatigue and excite resonance in the steel structure. To reduce the loads on the surrounding structure, increase the performance of crushing plants and save costs, engineers at thyssenkrupp have developed a new low-vibration jaw crusher. It features an innovative balancing technology that largely eliminates out-of-balance and minimizes operating vibrations particularly in the case of installation in a steel building or in semi-mobile and fully mobile crushing plants.

Motivation

In the past crushers were often installed on massive concrete foundations stretching in some cases over several floors to absorb and dampen vibrations and machine loads. To install crushers in semi-mobile and mobile plants, massive steel structures were needed. These structures had to be extensively tested for natural resonances. If the natural frequencies were the same as the frequency of the out-of-balance vibrations of the machine, there was a risk of the steel structure collapsing. In such cases the speed of the machine had to be shifted or the stiffness/mass of the steel...

Order the printed issue

Related articles:

03/2010

BHS-Sonthofen GmbH

The BHS vertical shaft impact crushers and mills are operating to the great satisfaction of many aggregate producers worldwide in order to improve the shape of the final product, to produce crushed...

more
03/2010

Pilot Crushtec (SA) (Pty) Ltd.

Twister VSI crushers of the South African based Pilot Crushtec use two variations of crushing. The first involves vertical shaft impact crushing, with rock being fed into a table type rotor which then...

more

Metso's Lokomo celebrates 100 years

Metso's Tampere unit, better known locally as Lokomo, is celebrating its one hundredth year of industrial existence in May in Tampere/Finland. Oy Lokomo Ab started operating in Tampere in April 1915....

more
04/2012

Metso to supply crushing equipment to Venezuela

Metso has signed a contract with Camargo Corrêa and Hydro­logic Company to supply equipment to the new crushing and screening plant in Venezuela. The new plant is part of the TUY-IV project, which...

more
05/2009

Global competence

Sandvik recently announced the creation of a worldwide center of excellence based in the UK and Northern Ireland for its mobile crushing and screening product lines. The establishment of the center...

more