Optimal selection and installation of backstops for conveyor systems
If freewheels are deployed as backstops, they are entirely devoted to operational and work safety. In the drive systems of conveyor systems, they prevent the reverse movement of conveyor belts when maintenance work is being carried out, in emergency-stop situations or during power failures. In this specialist article, the different types of backstops available and what you need to take into consideration when selecting and installing them are discussed by someone who knows what he is talking about. Author Thomas Heubach was not only chairman of the Forschungsvereinigung Antriebstechnik (FVA) research team for more than 15 years, he is also the division head at RINGSPANN, the worldwide leading manufacturer of industrial freewheels.
When the drive systems of conveyor belt systems or bucket conveyors are in operation, they are usually being used to quickly and safely transport bulk goods upwards. All plant operators are understandably united in their desire for problem-free 24/7 continuous operation. The only reasons these systems should be brought to a halt are for maintenance purposes or in emergencies. In such cases, backstops (or brakes) prevent the reverse movement of the conveyor belts – if the power fails or the motor is switched off. The installation location of the backstops (BS) depends on the design of a conveyor system. In small and medium-sized systems it is common to place them directly on the motors or in the gearboxes. In large conveyor systems, large BS are often mounted onto the conveying shaft between the pedestal bearing and the output shaft of the gearbox.
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