Overrunning Alternator Pulley And How It Works

Overrunning Alternator Pulley And How It Works

Article Outline:

  1. What is overrunning alternator pulley?

  2. Where are overrunning alternator pulley used?

  3. Why should we use overrunning alternator pulley?

  4. The structure of overrunning alternator pulley

  5. The working principle of overrunning alternator pulley

What is overrunning alternator pulley(OAP)?

The overrunning alternator pulley is a one-way alternator pulley, in other words, a pulley that can only rotate in one direction between the shell (the outer ring of the bearing) and the core shaft (the inner ring of the bearing).

Where are overrunning alternator pulley used?

Where are overrunning alternator pulley used?
Where are overrunning alternator pulley used?

The OAP is mainly connected by the internal thread of the mandrel and the external thread of the automobile generator in the form of a threaded connection, and at the same time, the axial positioning is performed through the limit ring.

Why should we use overrunning alternator pulley?

Improve the service life of generators

The traditional automobile generator pulley runs synchronously with the rotation speed of the automobile engine. Therefore, when the automobile is started, there is a gap between the transmission sleeve and the transmission shaft cylinder. When the transmission shaft cylinder is instantaneously started, the external transmission shaft is sleeved. The drum is easy to bounce and vibrate, and even produces a reverse spin. At this moment, it also drives the transmission belt to slightly reverse rotation. Although it is a short round, and then switched back to normal rotation, such repeated electrode alternation will reduce the life of the generator. After using OAP, because OAP rotates in one direction, when the transmission shaft bounces and shakes, even if the transmission belt rotates in the opposite direction, the motor rotor will not rotate, which avoids the phenomenon of negative electrode current and effectively protects the generator.

Increase the life of the belt

With the increase of automotive electronics and electrical equipment, the power of automotive generators continues to increase, so that the weight of the generator rotor must be increased. During the acceleration and deceleration of the car, the influence of the rotational inertia of the engine rotor on the belt will follow. Increase. The traditional generator pulley and the rotor operate synchronously. When the car is accelerating and decelerating, the moment of inertia of the generator rotor directly acts on the belt, reducing the service life of the belt. After the OAP pulley is used, the unidirectionality of OPA avoids the reverse stretching force of the belt after the generator rotor stops rotating, which increases the service life of the belt.

Reduce vibration, reduce noise, and reduce fuel consumption.

After the OAP pulley is used, the reverse stretching force of the generator rotor after the belt stops rotating is avoided, and the instantaneous tension change of the belt is effectively alleviated. This not only controls the generation of vibration and noise, but also effectively protects the entire The belt rotation system also reduces fuel consumption by utilizing the reverse rotation energy of the generator.

The structure of overrunning alternator pulley

The structure of overrunning alternator pulley

The working principle of overrunning alternator pulley

OAP, through the unidirectional nature of its one-way bearing, is that the shell and the core shaft of the pulley can only rotate in one direction.

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