Balancing and Diagnostic System for Complete Passenger Vehicle Engine Cooling Fans
EJR | EJS | EJU | EJH

Range of application
Performance and objective noise tests in the production of complete passenger vehicle engine cooling fans.

Measurement of dynamic and static unbalance in the fan plane for optimum unbalance correction.

Design
One or two-station machine with manual or fully automatic loading, automatic test sequence and manual unbalance correction.

Machine frame with unbalance measurement and test equipment, protective housing with wide loading or maintenance doors, measurement and control cabinet with test computer and power unit for the test object.

Clamping of the fan to the casement or motor is possible, position of the motor either vertical or horizontal.

The work-pieces can be delivered to the machine on pallets, by transfer conveyor, or in boxes.

Measuring systems built into the control cabinet, essentially consisting of industrial PC with signal processor, TFT touch-screen and test software.

The modular design of the EJE/EJS system as single or double station allows free positioning of the test object. Testing in the actual mounting position and direct clamping in the casement ensures true and exact results. System adaptation to the requirements of the objective noise test such as structural isolation of the test equipment is possible. The sensors are designed to achieve high repeatability measurements specifically for this application. The horizontal arrangement of the test object in this semi-automatic machine is ergonomically designed for manual handling of the fan. Test requirements such as workload, complexity and cost are reduced by using trainable and adaptive test software. The system delivers an objective diagnosis based on pre-classified data and identification of statistical distribution in an interactive learning process. The experience of the user in detecting typical manufacturing errors can have some influence on the learning process. Through optimization of the tolerance limits the precision of the diagnostic evaluation can be improved.

In this fully automatic diagnostic test stand with direct linking to the manufacturing line fan, motors are tested with respect to their mechanical and electrical properties. A special feature is the non-contacting noise measurement by laser for vibro-acoustic diagnosis.