Anti-Reverse Coupling

About Anti-Reverse Couplings

In some applications, equipment must be restrained from rotating in the reverse direction. This is typically known as an anti-reverse rotation device. A clutch or brake can be used for this purpose, but they might be too complicated or expensive for the system. CCA can offer a simple anti-reverse rotation solution that keeps the equipment operating in the correct direction.

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  Integrated anti-rotation device in the FLEXXOR coupling

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  Anti-rotation pawl interacting with the floor-mounted backstop.

Integrated Anti-Reverse Feature

Coupling Corp has developed an integrated anti-reverse feature available in its FLEXXOR couplings that will allow equipment to turn in its normal direction while preventing reverse rotation. The coupling uses centrifugally actuated ratcheting pawls that extend and retract at specifically designed rotational speeds. At low speeds, the extended pawls contact a floor-mounted backstop. If the rotating assembly attempts to rotate backwards, the pawls lock into place and keep the equipment from moving.

There are several applications where this type of anti-rotation device is commonly used. The most common are in fan or pump systems where there may be back pressure against the fan blades or pump impeller, causing them to rotate when not under power. This small movement can become a problem if the system attempts to start while slowly spinning backwards because the large torque spike could easily break a system component.

Coupling Corp has the ability to customize the design to meet certain speed and geometry requirements. There may be a reason to design backstop geometry that fits with existing baseplates or other physical limitations. Coupling Corp can work with you to optimize the system. This feature can also be added to vertical couplings in cases where a motor anti-rotation device can’t be added.

The Coupling Corp anti-rotation coupling helps ensure that the equipment can run successfully when it is needed most.