1975 Schenck H4V

Manufacturer: Schenck 

Model: H4V

Year of Manufacture: 1975

Machine Type : Balancing Machine

Technical Data

Rotor Weight Range: 4 to 750 kg

Machine Capacity with Symmetrical Loading: Up to 1000 kg

Maximum per Bearing Stand: 500 kg

Machine can be underloaded at lower requirements on balancing quality

Maximum Rotor Diameter Above Machine Bed: 1420 mm

Bearing Journal Diameter: 12 to 200 mm

Balancing Speed: The balance speed n is dependent on mass moment of inertia (Gr squared) of rotor, to be selected so that specified values of drive are not exceeded

Position of Balance Planes: In relation to bearing planes any position (including cantilevered)

Drive Data

Balance Speeds: Approximately 180/320/565/950 rpm

These speeds based on medium motor speed 950 rpm (50 Hz mains frequency). At 60 Hz the balance speeds are 20% higher.

With consideration to adjustability of measuring device corresponding to geometric dimensions of rotors, the value G n squared equals 450 x 10 to the 6th power kgm squared per min squared should not be exceeded. This limit applies approximately symmetrically between bearing stands for rigid rotors. For dynamic alignment of elastic rotors and for stiffness control, this value can be increased.

Maximum Display Sensitivity: Per bearing plane 1 mm pointer deflection per 2.5 gmm unbalance

Achievable Balancing Quality: Depending on nature of rotors (elasticity, plasticity) and their bearing; in borderline cases down to 1 mm pointer deflection at full utilization of display sensitivity, up to limit of unavoidable drive element error (approximately 0.5 gmm per kg rotor weight)

Performance

Average Setup Time: 3 minutes

Average Setting Time for Measuring Device: 2 minutes

(Above mentioned times only of interest for individual balancing)

Average Measuring Time per Measuring Device: See description of measuring device

Achievable unbalance in one step with exact balance up to 95% of unbalance present before balancing

Size display normally directly in grams. Calibration to other scale values possible.

Drive Motor: Three-Phase Slip Ring Motor

Power: Approximately 7.5 kW Speed: Approximately 950 rpm

With this drive the balance speed n is dependent on mass moment of inertia (Gr squared) so selected that the value (Gr squared) n squared equals max. 110 x 10 to the 6th power kgm squared per min squared is not exceeded (without consideration of air resistance and friction losses).

At this limit value, 3 cycles (runs) per hour permissible. For smaller (Gr squared) n squared values, cycle count increases proportionally.

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