Hansen Industrial Transmissions (HIT) has recently introduced a hydraulic brake system for its M4 ACC (Air Cooled Condenser) industrial gearboxes, which allows the user to safely slow down the gear unit and condenser fan and keep them at standstill during maintenance activities in dry cooling towers.
With this hydraulic brake system, HIT is now equipped with a tool that avoids the risk of maintenance personnel being injured due to windmilling (an idle fan which starts rotating due to airflow and thus driving the gear unit). The system is unique in that the braking force not only holds the fan and gear unit when at a standstill, but is capable of decelerating it to a safe stop within a limited braking time.
It consists of two hydraulic brake cylinders with brake shoes and a hand pump with hose. The brake cylinders are built onto the motor lantern and brake on the coupling between the motor and gear unit. The system also allows demounting of the motor for maintenance, because the shoes only work on the bottom half of the coupling.
Hansen Transmissions SA
+27 11 397 2495
Hansen M4ACC Hydraulic Brake jpg: The Hansen M4ACC hydraulic brake system has a patent pending.