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Air Blower Rotors Threaten Mine Site

When managing a mine which produces 6 million tonnes of bauxite a year a nightmare becomes reality when a critical part of production machinery breaks and there are no spares. In this particular case 3 blower rotors went  down one after another in quick succession. Each assembly had two 3 lobe blower rotors weighing  490kg each.  The situation became critical so the site put the entire blower rotor assembly weighing 1500kg on an aeroplane  and flew it 1800km to Perth Western Australia where they quickly ended up at VEEM Ltd. The airfreight alone cost $50,000.

VEEM immediately inspected the damaged rotors. Both the rotors had broken drive shafts. The engineer tasked with defining the cause, analysed the design of the rotors. These particular blower rotors were manufactured in India. The engineer discovered that the rotors had no radii in the shafts change in section (stepdown) which is a fundamental design flaw. VEEM also analysed the shaft material using their spectrometer in the foundry laboratory.

A redesigned shaft including radii at the changes in section and fitting tolerances measured against the existing shaft diameters was quickly drafted up and manufactured. VEEM used a better quality material for the shaft and stress relieved it via heat treatment.

Finally the shaft was meticulously fitted. To do this liquid nitrogen is used to shrink the shaft for a perfect fit. It is then dynamically balanced to ISO specifications and NDT analysis was performed to crack test the new rotors and NATA certified. Having machining, welding, balancing, NDT and a foundry in house enables VEEM to very quickly turnaround urgent jobs. By working 2 shifts the rotor assembly  was soon back on an aeroplane and flown back to the mine.

VEEM Ltd have since fixed 8 of these blower rotors which all have the same inherent flaw. For more information visit www.veem247.com    email   sales@veem.com.au  or call  +61 08 9455 9307

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VEEM At Motorvation

VEEM’s Driveshaft Division showcased their high performance driveshaft components at Motorvation hosted by Perth Motorplex in Kwinana Beach. The annual event drew motoring enthusiasts from around the country in record numbers. Motorvation is the biggest car event on the Perth calendar and features not just amazing display cars, but the full gambit of car competitions including The Slalom, The Megaskid, The Burnout and Miss Motorvation.

Elite-DFoxMany punters wandered through the VEEM stand in traders alley to view the diffs and drive shafts on display and asked questions about their own modified vehicles at home. Many had increased the engine size or power output and wanted information about the 9″ diff assemblies and the compatible drive shaft options. The 9″ diffs are one of the strongest differential setups for cars and are the preferred solution for modified cars. VEEM have been doing drive shafts for over 40 years and have been at Motorvation since the inception. They have a wealth of experience in custom and performance shafts.

Another common vein of enquiry was about the high failure rate of drive shafts in late model high performance Falcons and Commodores namely the BA BF FG and VR VS VT VY VZ VE series. Most had premature failure of CV Joints or centre bearings. VEEM staff were able to suggest better alternate solutions using high performance components which are designed to cope with the torque that these shafts operate under.

Motorvation @ Perth MotorplexAnother recurring question is “How can I tell if the driveshaft is the problem?” An easy test is to get the vehicle up to the speed that the vibration or noise is most apparent and then put the vehicle in to neutral. If the noise or vibration stops then the problem is not likely to be drive shaft related. This test should be done in a safe flat environment taking into consideration the loss of engine braking.

Like all good things Motorvation has come to an end for this year. If you can’t wait until next year to get some drive shaft advice contact VEEM at sales@veem.com.au or call 94559372.

 

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VEEM Work Helps Find the Higgs Boson

The Large Hadron Collider (LHC), part of the large accelerator complex at CERN laboratory in Switzerland is in operation and recently scientists have made announcements regarding experiment results.  The research into sub-atomic particles is an international collaboration investigating a wide range of physics.  One of the objectives of the LHC is to search for a theoretical particle that may provide answers to verify the accuracy of the Standard Model.  The elusive Higgs Boson is thought to explain how particles were given mass when they came into contact with an invisible force field called the ‘Higgs Field’ at the earliest moments in the formation of the universe.

The components VEEM manufactured were made from a lead bronze alloy and were cast, machined, tested and trial assembled prior to delivery for installation. The components make up key elements of a radiation shield (Plug 1 segments and Plugs 2 and 3) to protect instrumentation used in the ATLAS experiments.

VEEM is proud to have produced very large castings that may assist in finding some of the smallest particles in the universe.

europe

European Organisation for Nuclear Research

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