visszaforgatása

Visszaforgatása is a Hungarian term that denotes the act or process of rotating in the opposite direction to the intended drive, i.e., reverse rotation or backspin. The concept is primarily used in engineering and technical contexts to describe a rotor, shaft, gear, or other rotating component that begins to turn backward relative to the primary drive.

In mechanical systems, visszaforgatása can occur when the driving torque is removed or reduced while the moving parts retain inertia, or when external forces (such as loads, wind, or back-driving through gears) impose a reverse torque. It can be undesirable, potentially causing mechanical damage, increased wear, misalignment, or safety concerns. On the other hand, reverse rotation can be exploited for braking or safety functions in some designs.

Common mitigation methods include the use of overrunning clutches or one-way bearings, freewheeling devices, mechanical stops, or braking systems that limit unwanted backward motion. In electrical machines, back-rotation can occur when a running motor is driven by external torque or during faults, producing back-EMF; protections and braking strategies are used to manage such conditions.

The term appears in technical manuals, maintenance guides, and standards dealing with rotor dynamics, gear trains, turbines, and other rotating equipment. Understanding visszaforgatása is important for reliability, safety, and the proper design of drive systems and protective measures.