Functions of Speed Reducers in Gearboxes

Tuesday - 02/01/2018 21:14

Functions of Speed Reducers in Gearboxes

When power transmitting mechanical systems need more torque, it doesn't manifest by magic. Energy conservation takes over and the necessary torque is delivered by reducing the speed of an input power source.

That's how the fundamental laws of physics work when mechanical systems interact, with speed reducers multiplying torque while simultaneously attenuating the velocity of the meshing gears. Horsepower or torque, radial velocity or rotational speed, the goal in this engineering scenario is to alter key power transmitting characteristics by interlocking differently sized gearing components.

How Do Speed Reducers Work?

A series of efficient gearing modules line up to manipulate input energy. A smaller gear locks against larger wheels and turns them, forming the backbone of a powerful drive chain. It doesn't require much imagination to figure out what happens next. The small wheel retains its high-speed rotational properties, but it takes a longer period of time for the bigger wheels to complete a full turn. Speed reduction is taking place.

This is the primary function, the core purpose of these gearboxes. They interface with wildly energetic mill wheels or briskly rotating turbine shafts, with any form of rapidly rotating prime mover, and they scale back input velocity by introducing mechanical power manipulators, the pinions, gears, and torque converting innards that define contemporary gearboxes.

Defining Functions

As with most mechanical processes, if changes are made to one engineering variable, a subsequent effect takes place elsewhere. For example, these variably sized gears are designed to reduce input radial velocity. Input speed drops as drive sections interact inside gearboxes.

And, as the speed falls, torque increases. It's basically a proportionally inverse relationship, one that's generated inside the housing. Speed is dropping but energy cannot be lost, so the force rushing through the gears is amplified. We now have two desirable functions, the manipulation of speed and the ability to regulate just how much force is applied to an output shaft. Imagine a slow moving conveyor system using the former asset.


Meanwhile, a high-capacity crane or warehouse hoist leverages brute muscle from the system, taking pure torque from that initial fast-moving input stage by placing speed reducers inside the gearing equipment. Auxiliary parts in the gear train include special ratio altering sections and helical components, specially engineered sliding teeth that handle torque with superior mechanical aptitude.

Speed regulation and torque manipulation work in tandem, converting raw rotational force into intelligently managed output speeds while applying the necessary brute force to power any mechanical process.

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