Wanakbori Thermal Power Station of Gujarat Electricity
Board is situated near Baroda in India. The plant runs
round the clock to constantly feed electricity to the
neighboring areas and the National
Coal is brought from different collieries and forms the
basic fuel to operate the steam generators.
Four COAL CRUSHERS of Elecon make were installed
around the middle of 80's on five storeyed high steel
structures
Despite segregation, hard objects, such as stones, rock
ores and metal pieces find their way to the CRUSHERS
generating very high transient SHOCK FORCES.
In 1995, major damages were noticed on the steel
structure supporting the crushers. Welding at critical
places were found to have given away.
RESISTOFLEX were contracted to provide a solution
including Finite Element Analysis & RCC foundation.
A complete Vibration Isolation System (including
Analysis) was engineered in LONDON in association
with their collaborators CHRISTIE & GREY.
The units were manufactured and tested at
RESISTOFLEX plant in INDIA.
The COAL CRUSHER was reinstalled using a concrete
foundation on STEEL SPRINGS AND VISCOUS
DAMPERS. The same steel structure was used.
Vibration measurements taken at various points on the
crusher were only 80 microns under no load, and 290
microns under full load. On the supporting structure only
4 microns were measured.
This is drastic reduction from 1265 microns observed on
the CRUSHER and 297 microns on supporting structure
of the adjoining CRUSHER installed in the conventional
manner without any Vibration Isolation System.
In the interest of continual development and improvement, the company reserves the right to make modifications to these details without notice