ACMI Cement Industry Gear Boxes

For more than 20 years our teams realize gear boxes under the brand name ACMI. Many cement plant equipments are driven by ACMI gearboxes.

The practiced technologies rely on traditions of Quality and High Precision, in particular concerning the tooth flank corrections. All internal calculation programs have been developed and cross check with experience, and compared to external programs.

Toothing

The optimization is achieved through a computerized calculation process based upon AGMA, ISO, DIN or AFNOR standards.

The single helical gear technology relies on tooth longitudinal and profile corrections. It leads to ratios up to 6 to 1 per stage and a grinding accuracy reaching ISO level 3 (AGMA 13).

Bearings

Thanks to a close collaboration with the biggest bearings manufacturers, the MAAG Frances specials designed their gearboxes with bearings up to very high torque’s. The design staff has a specific computer program for these applications.

Casings

Welded steel casing technology allows optimization of the center distance from 100 to 1600 mm, and leads to gearboxes strictly adapted to customer requirements. In particular the casing may include the oil tank or may be integrated to the driving or the driven machine.

In special cases a Finite Element Calculation can be performed.

Lubrication

Lube oil supply is provided by a separate lube oil system. Lube oil pump can be mechanically driven and fitted on to the gearbox or driven by a seperate electric motor. Oil supply is used to lubricate the tooting and bearings and to evacuate calories through a cooling system.

Standards

All gearboxes designed to comply with the most stringent rules and standards depending on specific customer requirements.

Vibrations-Noise

The use of lateral and torsional Critical Speed Analysis software enables to avoid resonances and to minimize the sound level generated by the tooting. The guaranty of performances is achieved by the most stringent is achieved by the most stringent requirements at all stages of engineering and manufacturing.

Quality Assurance System

A quality assurance system based on the requirements of the ISO 9001 standard embraces all activities. It relies on the experience acquired thanks to military and space activities.

Tests

As all ACMI gearboxes, the increasing gears are tested on our test beds. The tests are made, if necessary, under API standard. Our facilities are equipped with cooling system, oil filtration and safety oil tank. Vibrations are analyzed on each shaft with a specific report. Sound is measured with Bruel et Kjaer device. Oil flows at nominal pressure are recorded.

Efficiency can also be measured by using a torque meter or by calibration of the electric motor and accessories. Carrying out the necessary tests needs well known and field approved measuring equipments such as vibration probes and temperature detectors. The accuracy of the manufacturing and the quality of the engineering and assembly lead to high efficiency close to 99% per stage.

Applications

ACMI gear boxes are well adapted to all sensitive equipment drives, mainly when a gear box failure brings the plant to standstill.