Transmission Types And Gearbox Repairs

For power sources to produce useful work, their energy necessarily must be transmitted to a working implement of some sort. A transforming of rotational forces produced by a motor or engine, through modifying the speed, torque or rotational direction can produce an optimum force required for the work. Eventually all these mechanical devices will require Gearbox repairs.

A device, also known as a reducer, is required if the working machine has to run at output speeds which vary from engine speeds. Using gears of different ratios will produce needed changes in torque and speed.

By meshing the rotating drive or input gear with an output gear that is of larger size and having more teeth, rotational speed is slowed. Torque is also increased, producing a mechanical advantage. The automobile is one application where this can be seen. Its engine, to run smoothly, must produce many times the rotation per minute than can be used where the wheel meets the road.

Some applications such as large wind turbines will have the opposite requirements. Their structural and design requirements make it necessary that the blades of the turbine turn a slower speed than the several revolutions per minute required for generators to produce electricity. Here the gearbox increases speed.

The transmission device can be quite complex, with multiple choices of output speeds supplied by gears of several different sizes. An automobile transmission is an example of this. When the car is first put into motion the engine’s rotational power must be slowed considerably and the torque or mechanical advantage increased, so that inertia may be overcome. A larger output gear will accomplish this.

As the vehicle’s speed and momentum increase, there is less demand for torque and more for speed. Faster rotation of the wheels results when output gears of successively smaller size are utilized. An overdrive gear may even be available for cruising at high speed.

When steep hills are encountered the car’s momentum will again be slowed by the increased work demands of overcoming increased gravitational forces. Now it becomes necessary to gear down once again producing more torque, until the hill is climbed. Trucks carrying or pulling heavy loads will have the same demands. Those same trucks climbing hills will need gearing different from that of economy or cruising vehicles.

A change of rotational angle or direction is necessary with some applications. The helicopter rotor is an prime example of this. The rotating vertical shaft transmits the engine’s energy, but drives a rotor, which turns at a right angle to the shaft.

Wear and eventual failure of the gearbox and its components will occur over time, necessitating Gearbox repairs. In that event the causes of failure can be determined by skilled technicians through inspection and analysis of parts. Those damaged parts may be repaired or refurbished. If needed they will be replace with fabricated or manufactured parts. This unit should work exactly the same as a new one, or with some adjustments, possibly with extended life or improved performance.

Learn more about the different types of gear reducers and gearbox repairs now in our super guide to common gearbox problems