VTM-72 double-strut cardan balancing machine
The VTM-72 specializes in balancing two propshafts and is designed for use in railroad repair depots. However, it is also capable of handling other types of universal joint shafts up to 80 kg in weight and length up to 1600 mm.
The machine has an accuracy of 10 g/kg, which makes it possible to balance driveshafts for heavy special equipment and industry. Thanks to this feature it is very popular in various production sectors. The versatility of the equipment makes it possible to work with a variety of products, which makes it in demand in repair services and workshops. High productivity allows to work with serial parts, which is especially useful for producers of special equipment and units, such as cardan shafts.
The equipment includes resonance-type vibration mounts with vibration sensors and spindle assemblies, as well as frames and a set of protective brackets. The rear support can move relative to the bed to work with gimbals of different lengths. The machine is controlled by a control panel, which is part of a separate control cabinet. The cabinet also contains a frequency converter for stepless speed control of the motor and optimal speed setting to bypass “resonance frequencies” that can affect the quality of balancing.
Unbalance detection is performed by converting the vibrations of the supports into a digital signal by means of vibration sensors and reading the speed of the driveshaft by a photoresistive speed sensor, which converts it into electronic pulses. Signals from the sensors go to the computing unit of the balancing system and are displayed on the screen of the microprocessor balancing device located on the control panel in a convenient form for the operator’s perception.
The machine works on the basis of balancing system PB-02M. It has long proven itself as a reliable system for production environment. Some machines equipped with this balancing system are over 20 years old, and they continue to operate without failure. Although the PB-02M balancing system was developed quite a long time ago, it is up-to-date due to the introduction of new functions facilitating the work with the machine.